diff -urN linux-5.15/MAINTAINERS linux-5.15-lrng/MAINTAINERS
--- linux-5.15/MAINTAINERS 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/MAINTAINERS 2021-11-29 12:36:52.113279174 +1100
@@ -10830,6 +10830,13 @@
F: Documentation/memory-barriers.txt
F: tools/memory-model/
+LINUX RANDOM NUMBER GENERATOR (LRNG) DRIVER
+M: Stephan Mueller <smueller@chronox.de>
+S: Maintained
+W: https://www.chronox.de/lrng.html
+F: drivers/char/lrng/*
+F: include/linux/lrng.h
+
LIS3LV02D ACCELEROMETER DRIVER
M: Eric Piel <eric.piel@tremplin-utc.net>
S: Maintained
diff -urN linux-5.15/MAINTAINERS.orig linux-5.15-lrng/MAINTAINERS.orig
--- linux-5.15/MAINTAINERS.orig 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/MAINTAINERS.orig 2021-11-29 12:32:21.653280206 +1100
@@ -0,0 +1,20816 @@
+List of maintainers and how to submit kernel changes
+====================================================
+
+Please try to follow the guidelines below. This will make things
+easier on the maintainers. Not all of these guidelines matter for every
+trivial patch so apply some common sense.
+
+Tips for patch submitters
+-------------------------
+
+1. Always *test* your changes, however small, on at least 4 or
+ 5 people, preferably many more.
+
+2. Try to release a few ALPHA test versions to the net. Announce
+ them onto the kernel channel and await results. This is especially
+ important for device drivers, because often that's the only way
+ you will find things like the fact version 3 firmware needs
+ a magic fix you didn't know about, or some clown changed the
+ chips on a board and not its name. (Don't laugh! Look at the
+ SMC etherpower for that.)
+
+3. Make sure your changes compile correctly in multiple
+ configurations. In particular check that changes work both as a
+ module and built into the kernel.
+
+4. When you are happy with a change make it generally available for
+ testing and await feedback.
+
+5. Make a patch available to the relevant maintainer in the list. Use
+ ``diff -u`` to make the patch easy to merge. Be prepared to get your
+ changes sent back with seemingly silly requests about formatting
+ and variable names. These aren't as silly as they seem. One
+ job the maintainers (and especially Linus) do is to keep things
+ looking the same. Sometimes this means that the clever hack in
+ your driver to get around a problem actually needs to become a
+ generalized kernel feature ready for next time.
+
+ PLEASE check your patch with the automated style checker
+ (scripts/checkpatch.pl) to catch trivial style violations.
+ See Documentation/process/coding-style.rst for guidance here.
+
+ PLEASE CC: the maintainers and mailing lists that are generated
+ by ``scripts/get_maintainer.pl.`` The results returned by the
+ script will be best if you have git installed and are making
+ your changes in a branch derived from Linus' latest git tree.
+ See Documentation/process/submitting-patches.rst for details.
+
+ PLEASE try to include any credit lines you want added with the
+ patch. It avoids people being missed off by mistake and makes
+ it easier to know who wants adding and who doesn't.
+
+ PLEASE document known bugs. If it doesn't work for everything
+ or does something very odd once a month document it.
+
+ PLEASE remember that submissions must be made under the terms
+ of the Linux Foundation certificate of contribution and should
+ include a Signed-off-by: line. The current version of this
+ "Developer's Certificate of Origin" (DCO) is listed in the file
+ Documentation/process/submitting-patches.rst.
+
+6. Make sure you have the right to send any changes you make. If you
+ do changes at work you may find your employer owns the patch
+ not you.
+
+7. When sending security related changes or reports to a maintainer
+ please Cc: security@kernel.org, especially if the maintainer
+ does not respond. Please keep in mind that the security team is
+ a small set of people who can be efficient only when working on
+ verified bugs. Please only Cc: this list when you have identified
+ that the bug would present a short-term risk to other users if it
+ were publicly disclosed. For example, reports of address leaks do
+ not represent an immediate threat and are better handled publicly,
+ and ideally, should come with a patch proposal. Please do not send
+ automated reports to this list either. Such bugs will be handled
+ better and faster in the usual public places. See
+ Documentation/admin-guide/security-bugs.rst for details.
+
+8. Happy hacking.
+
+Descriptions of section entries and preferred order
+---------------------------------------------------
+
+ M: *Mail* patches to: FullName <address@domain>
+ R: Designated *Reviewer*: FullName <address@domain>
+ These reviewers should be CCed on patches.
+ L: *Mailing list* that is relevant to this area
+ S: *Status*, one of the following:
+ Supported: Someone is actually paid to look after this.
+ Maintained: Someone actually looks after it.
+ Odd Fixes: It has a maintainer but they don't have time to do
+ much other than throw the odd patch in. See below..
+ Orphan: No current maintainer [but maybe you could take the
+ role as you write your new code].
+ Obsolete: Old code. Something tagged obsolete generally means
+ it has been replaced by a better system and you
+ should be using that.
+ W: *Web-page* with status/info
+ Q: *Patchwork* web based patch tracking system site
+ B: URI for where to file *bugs*. A web-page with detailed bug
+ filing info, a direct bug tracker link, or a mailto: URI.
+ C: URI for *chat* protocol, server and channel where developers
+ usually hang out, for example irc://server/channel.
+ P: Subsystem Profile document for more details submitting
+ patches to the given subsystem. This is either an in-tree file,
+ or a URI. See Documentation/maintainer/maintainer-entry-profile.rst
+ for details.
+ T: *SCM* tree type and location.
+ Type is one of: git, hg, quilt, stgit, topgit
+ F: *Files* and directories wildcard patterns.
+ A trailing slash includes all files and subdirectory files.
+ F: drivers/net/ all files in and below drivers/net
+ F: drivers/net/* all files in drivers/net, but not below
+ F: */net/* all files in "any top level directory"/net
+ One pattern per line. Multiple F: lines acceptable.
+ X: *Excluded* files and directories that are NOT maintained, same
+ rules as F:. Files exclusions are tested before file matches.
+ Can be useful for excluding a specific subdirectory, for instance:
+ F: net/
+ X: net/ipv6/
+ matches all files in and below net excluding net/ipv6/
+ N: Files and directories *Regex* patterns.
+ N: [^a-z]tegra all files whose path contains tegra
+ (not including files like integrator)
+ One pattern per line. Multiple N: lines acceptable.
+ scripts/get_maintainer.pl has different behavior for files that
+ match F: pattern and matches of N: patterns. By default,
+ get_maintainer will not look at git log history when an F: pattern
+ match occurs. When an N: match occurs, git log history is used
+ to also notify the people that have git commit signatures.
+ K: *Content regex* (perl extended) pattern match in a patch or file.
+ For instance:
+ K: of_get_profile
+ matches patches or files that contain "of_get_profile"
+ K: \b(printk|pr_(info|err))\b
+ matches patches or files that contain one or more of the words
+ printk, pr_info or pr_err
+ One regex pattern per line. Multiple K: lines acceptable.
+
+Maintainers List
+----------------
+
+.. note:: When reading this list, please look for the most precise areas
+ first. When adding to this list, please keep the entries in
+ alphabetical order.
+
+3C59X NETWORK DRIVER
+M: Steffen Klassert <klassert@kernel.org>
+L: netdev@vger.kernel.org
+S: Odd Fixes
+F: Documentation/networking/device_drivers/ethernet/3com/vortex.rst
+F: drivers/net/ethernet/3com/3c59x.c
+
+3CR990 NETWORK DRIVER
+M: David Dillow <dave@thedillows.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/3com/typhoon*
+
+3WARE SAS/SATA-RAID SCSI DRIVERS (3W-XXXX, 3W-9XXX, 3W-SAS)
+M: Adam Radford <aradford@gmail.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.lsi.com
+F: drivers/scsi/3w-*
+
+53C700 AND 53C700-66 SCSI DRIVER
+M: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/53c700*
+
+6LOWPAN GENERIC (BTLE/IEEE 802.15.4)
+M: Alexander Aring <alex.aring@gmail.com>
+M: Jukka Rissanen <jukka.rissanen@linux.intel.com>
+L: linux-bluetooth@vger.kernel.org
+L: linux-wpan@vger.kernel.org
+S: Maintained
+F: Documentation/networking/6lowpan.rst
+F: include/net/6lowpan.h
+F: net/6lowpan/
+
+6PACK NETWORK DRIVER FOR AX.25
+M: Andreas Koensgen <ajk@comnets.uni-bremen.de>
+L: linux-hams@vger.kernel.org
+S: Maintained
+F: drivers/net/hamradio/6pack.c
+
+802.11 (including CFG80211/NL80211)
+M: Johannes Berg <johannes@sipsolutions.net>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
+F: Documentation/driver-api/80211/cfg80211.rst
+F: Documentation/networking/regulatory.rst
+F: include/linux/ieee80211.h
+F: include/net/cfg80211.h
+F: include/net/ieee80211_radiotap.h
+F: include/net/iw_handler.h
+F: include/net/wext.h
+F: include/uapi/linux/nl80211.h
+F: net/wireless/
+
+8169 10/100/1000 GIGABIT ETHERNET DRIVER
+M: Heiner Kallweit <hkallweit1@gmail.com>
+M: nic_swsd@realtek.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/realtek/r8169*
+
+8250/16?50 (AND CLONE UARTS) SERIAL DRIVER
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-serial@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
+F: drivers/tty/serial/8250*
+F: include/linux/serial_8250.h
+
+8390 NETWORK DRIVERS [WD80x3/SMC-ELITE, SMC-ULTRA, NE2000, 3C503, etc.]
+L: netdev@vger.kernel.org
+S: Orphan / Obsolete
+F: drivers/net/ethernet/8390/
+
+9P FILE SYSTEM
+M: Eric Van Hensbergen <ericvh@gmail.com>
+M: Latchesar Ionkov <lucho@ionkov.net>
+M: Dominique Martinet <asmadeus@codewreck.org>
+L: v9fs-developer@lists.sourceforge.net
+S: Maintained
+W: http://swik.net/v9fs
+Q: http://patchwork.kernel.org/project/v9fs-devel/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs.git
+T: git git://github.com/martinetd/linux.git
+F: Documentation/filesystems/9p.rst
+F: fs/9p/
+F: include/net/9p/
+F: include/trace/events/9p.h
+F: include/uapi/linux/virtio_9p.h
+F: net/9p/
+
+A8293 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/a8293*
+
+AACRAID SCSI RAID DRIVER
+M: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.adaptec.com/
+F: Documentation/scsi/aacraid.rst
+F: drivers/scsi/aacraid/
+
+ABI/API
+L: linux-api@vger.kernel.org
+F: include/linux/syscalls.h
+F: kernel/sys_ni.c
+X: include/uapi/
+X: arch/*/include/uapi/
+
+ABIT UGURU 1,2 HARDWARE MONITOR DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/abituguru.c
+
+ABIT UGURU 3 HARDWARE MONITOR DRIVER
+M: Alistair John Strachan <alistair@devzero.co.uk>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/abituguru3.c
+
+ACCES 104-DIO-48E GPIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-104-dio-48e.c
+
+ACCES 104-IDI-48 GPIO DRIVER
+M: "William Breathitt Gray" <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-104-idi-48.c
+
+ACCES 104-IDIO-16 GPIO DRIVER
+M: "William Breathitt Gray" <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-104-idio-16.c
+
+ACCES 104-QUAD-8 DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+M: Syed Nayyar Waris <syednwaris@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/counter/104-quad-8.c
+
+ACCES PCI-IDIO-16 GPIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-pci-idio-16.c
+
+ACCES PCIe-IDIO-24 GPIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-pcie-idio-24.c
+
+ACENIC DRIVER
+M: Jes Sorensen <jes@trained-monkey.org>
+L: linux-acenic@sunsite.dk
+S: Maintained
+F: drivers/net/ethernet/alteon/acenic*
+
+ACER ASPIRE ONE TEMPERATURE AND FAN DRIVER
+M: Peter Kaestle <peter@piie.net>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://piie.net/?section=acerhdf
+F: drivers/platform/x86/acerhdf.c
+
+ACER WMI LAPTOP EXTRAS
+M: "Lee, Chun-Yi" <jlee@suse.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/acer-wmi.c
+
+ACPI
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Len Brown <lenb@kernel.org>
+L: linux-acpi@vger.kernel.org
+S: Supported
+W: https://01.org/linux-acpi
+Q: https://patchwork.kernel.org/project/linux-acpi/list/
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: Documentation/ABI/testing/configfs-acpi
+F: Documentation/ABI/testing/sysfs-bus-acpi
+F: Documentation/firmware-guide/acpi/
+F: drivers/acpi/
+F: drivers/pci/*/*acpi*
+F: drivers/pci/*acpi*
+F: drivers/pnp/pnpacpi/
+F: include/acpi/
+F: include/linux/acpi.h
+F: include/linux/fwnode.h
+F: tools/power/acpi/
+
+ACPI APEI
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Len Brown <lenb@kernel.org>
+R: James Morse <james.morse@arm.com>
+R: Tony Luck <tony.luck@intel.com>
+R: Borislav Petkov <bp@alien8.de>
+L: linux-acpi@vger.kernel.org
+F: drivers/acpi/apei/
+
+ACPI COMPONENT ARCHITECTURE (ACPICA)
+M: Robert Moore <robert.moore@intel.com>
+M: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
+L: linux-acpi@vger.kernel.org
+L: devel@acpica.org
+S: Supported
+W: https://acpica.org/
+W: https://github.com/acpica/acpica/
+Q: https://patchwork.kernel.org/project/linux-acpi/list/
+B: https://bugzilla.kernel.org
+B: https://bugs.acpica.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: drivers/acpi/acpica/
+F: include/acpi/
+F: tools/power/acpi/
+
+ACPI FAN DRIVER
+M: Zhang Rui <rui.zhang@intel.com>
+L: linux-acpi@vger.kernel.org
+S: Supported
+W: https://01.org/linux-acpi
+B: https://bugzilla.kernel.org
+F: drivers/acpi/fan.c
+
+ACPI FOR ARM64 (ACPI/arm64)
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+M: Hanjun Guo <guohanjun@huawei.com>
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-acpi@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/acpi/arm64
+
+ACPI I2C MULTI INSTANTIATE DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/i2c-multi-instantiate.c
+
+ACPI PMIC DRIVERS
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Len Brown <lenb@kernel.org>
+R: Andy Shevchenko <andy@kernel.org>
+R: Mika Westerberg <mika.westerberg@linux.intel.com>
+L: linux-acpi@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-acpi/list/
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: drivers/acpi/pmic/
+
+ACPI THERMAL DRIVER
+M: Rafael J. Wysocki <rafael@kernel.org>
+R: Zhang Rui <rui.zhang@intel.com>
+L: linux-acpi@vger.kernel.org
+S: Supported
+W: https://01.org/linux-acpi
+B: https://bugzilla.kernel.org
+F: drivers/acpi/*thermal*
+
+ACPI VIDEO DRIVER
+M: Zhang Rui <rui.zhang@intel.com>
+L: linux-acpi@vger.kernel.org
+S: Supported
+W: https://01.org/linux-acpi
+B: https://bugzilla.kernel.org
+F: drivers/acpi/acpi_video.c
+
+ACPI VIOT DRIVER
+M: Jean-Philippe Brucker <jean-philippe@linaro.org>
+L: linux-acpi@vger.kernel.org
+L: iommu@lists.linux-foundation.org
+S: Maintained
+F: drivers/acpi/viot.c
+F: include/linux/acpi_viot.h
+
+ACPI WMI DRIVER
+L: platform-driver-x86@vger.kernel.org
+S: Orphan
+F: drivers/platform/x86/wmi.c
+F: include/uapi/linux/wmi.h
+
+ACRN HYPERVISOR SERVICE MODULE
+M: Fei Li <fei1.li@intel.com>
+L: acrn-dev@lists.projectacrn.org (subscribers-only)
+S: Supported
+W: https://projectacrn.org
+F: Documentation/virt/acrn/
+F: drivers/virt/acrn/
+F: include/uapi/linux/acrn.h
+
+AD1889 ALSA SOUND DRIVER
+L: linux-parisc@vger.kernel.org
+S: Maintained
+W: https://parisc.wiki.kernel.org/index.php/AD1889
+F: sound/pci/ad1889.*
+
+AD5110 ANALOG DEVICES DIGITAL POTENTIOMETERS DRIVER
+M: Mugilraj Dhavachelvan <dmugil2000@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: drivers/iio/potentiometer/ad5110.c
+
+AD525X ANALOG DEVICES DIGITAL POTENTIOMETERS DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/AD5254
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/misc/ad525x_dpot.c
+
+AD5398 CURRENT REGULATOR DRIVER (AD5398/AD5821)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/AD5398
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/regulator/ad5398.c
+
+AD714X CAPACITANCE TOUCH SENSOR DRIVER (AD7142/3/7/8/7A)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/AD7142
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/input/misc/ad714x.c
+
+AD7877 TOUCHSCREEN DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/AD7877
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/input/touchscreen/ad7877.c
+
+AD7879 TOUCHSCREEN DRIVER (AD7879/AD7889)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/AD7879
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/input/touchscreen/ad7879.c
+
+ADDRESS SPACE LAYOUT RANDOMIZATION (ASLR)
+M: Jiri Kosina <jikos@kernel.org>
+S: Maintained
+
+ADF7242 IEEE 802.15.4 RADIO DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+L: linux-wpan@vger.kernel.org
+S: Supported
+W: https://wiki.analog.com/ADF7242
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/net/ieee802154/adf7242.txt
+F: drivers/net/ieee802154/adf7242.c
+
+ADM1025 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/adm1025.rst
+F: drivers/hwmon/adm1025.c
+
+ADM1029 HARDWARE MONITOR DRIVER
+M: Corentin Labbe <clabbe.montjoie@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/adm1029.c
+
+ADM8211 WIRELESS DRIVER
+L: linux-wireless@vger.kernel.org
+S: Orphan
+W: https://wireless.wiki.kernel.org/
+F: drivers/net/wireless/admtek/adm8211.*
+
+ADP1653 FLASH CONTROLLER DRIVER
+M: Sakari Ailus <sakari.ailus@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/adp1653.c
+F: include/media/i2c/adp1653.h
+
+ADP5520 BACKLIGHT DRIVER WITH IO EXPANDER (ADP5520/ADP5501)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/ADP5520
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/gpio/gpio-adp5520.c
+F: drivers/input/keyboard/adp5520-keys.c
+F: drivers/leds/leds-adp5520.c
+F: drivers/mfd/adp5520.c
+F: drivers/video/backlight/adp5520_bl.c
+
+ADP5588 QWERTY KEYPAD AND IO EXPANDER DRIVER (ADP5588/ADP5587)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/ADP5588
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/gpio/gpio-adp5588.c
+F: drivers/input/keyboard/adp5588-keys.c
+
+ADP8860 BACKLIGHT DRIVER (ADP8860/ADP8861/ADP8863)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/ADP8860
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/video/backlight/adp8860_bl.c
+
+ADT746X FAN DRIVER
+M: Colin Leroy <colin@colino.net>
+S: Maintained
+F: drivers/macintosh/therm_adt746x.c
+
+ADT7475 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/adt7475.rst
+F: drivers/hwmon/adt7475.c
+
+ADVANSYS SCSI DRIVER
+M: Matthew Wilcox <willy@infradead.org>
+M: Hannes Reinecke <hare@suse.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: Documentation/scsi/advansys.rst
+F: drivers/scsi/advansys.c
+
+ADVANTECH SWBTN DRIVER
+M: Andrea Ho <Andrea.Ho@advantech.com.tw>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/adv_swbutton.c
+
+ADXL34X THREE-AXIS DIGITAL ACCELEROMETER DRIVER (ADXL345/ADXL346)
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/ADXL345
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml
+F: drivers/input/misc/adxl34x.c
+
+ADXL372 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/accel/adi,adxl372.yaml
+F: drivers/iio/accel/adxl372.c
+F: drivers/iio/accel/adxl372_i2c.c
+F: drivers/iio/accel/adxl372_spi.c
+
+AF9013 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/af9013*
+
+AF9033 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/af9033*
+
+AFFS FILE SYSTEM
+M: David Sterba <dsterba@suse.com>
+L: linux-fsdevel@vger.kernel.org
+S: Odd Fixes
+F: Documentation/filesystems/affs.rst
+F: fs/affs/
+
+AFS FILESYSTEM
+M: David Howells <dhowells@redhat.com>
+M: Marc Dionne <marc.dionne@auristor.com>
+L: linux-afs@lists.infradead.org
+S: Supported
+W: https://www.infradead.org/~dhowells/kafs/
+F: Documentation/filesystems/afs.rst
+F: fs/afs/
+F: include/trace/events/afs.h
+
+AGPGART DRIVER
+M: David Airlie <airlied@linux.ie>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm
+F: drivers/char/agp/
+F: include/linux/agp*
+F: include/uapi/linux/agp*
+
+AHA152X SCSI DRIVER
+M: "Juergen E. Fischer" <fischer@norbit.de>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/aha152x*
+F: drivers/scsi/pcmcia/aha152x*
+
+AIC7XXX / AIC79XX SCSI DRIVER
+M: Hannes Reinecke <hare@suse.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/aic7xxx/
+
+AIMSLAB FM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-aimslab*
+
+AIO
+M: Benjamin LaHaise <bcrl@kvack.org>
+L: linux-aio@kvack.org
+S: Supported
+F: fs/aio.c
+F: include/linux/*aio*.h
+
+AIRSPY MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/airspy/
+
+ALACRITECH GIGABIT ETHERNET DRIVER
+M: Lino Sanfilippo <LinoSanfilippo@gmx.de>
+S: Maintained
+F: drivers/net/ethernet/alacritech/*
+
+ALCATEL SPEEDTOUCH USB DRIVER
+M: Duncan Sands <duncan.sands@free.fr>
+L: linux-usb@vger.kernel.org
+S: Maintained
+W: http://www.linux-usb.org/SpeedTouch/
+F: drivers/usb/atm/speedtch.c
+F: drivers/usb/atm/usbatm.c
+
+ALCHEMY AU1XX0 MMC DRIVER
+M: Manuel Lauss <manuel.lauss@gmail.com>
+S: Maintained
+F: drivers/mmc/host/au1xmmc.c
+
+ALI1563 I2C DRIVER
+M: Rudolf Marek <r.marek@assembler.cz>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/i2c/busses/i2c-ali1563.rst
+F: drivers/i2c/busses/i2c-ali1563.c
+
+ALIENWARE WMI DRIVER
+L: Dell.Client.Kernel@dell.com
+S: Maintained
+F: drivers/platform/x86/dell/alienware-wmi.c
+
+ALL SENSORS DLH SERIES PRESSURE SENSORS DRIVER
+M: Tomislav Denis <tomislav.denis@avl.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+W: http://www.allsensors.com/
+F: Documentation/devicetree/bindings/iio/pressure/asc,dlhl60d.yaml
+F: drivers/iio/pressure/dlhl60d.c
+
+ALLEGRO DVT VIDEO IP CORE DRIVER
+M: Michael Tretter <m.tretter@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/allegro,al5e.yaml
+F: drivers/media/platform/allegro-dvt/
+
+ALLWINNER A10 CSI DRIVER
+M: Maxime Ripard <mripard@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml
+F: drivers/media/platform/sunxi/sun4i-csi/
+
+ALLWINNER CPUFREQ DRIVER
+M: Yangtao Li <tiny.windzz@gmail.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml
+F: drivers/cpufreq/sun50i-cpufreq-nvmem.c
+
+ALLWINNER CRYPTO DRIVERS
+M: Corentin Labbe <clabbe.montjoie@gmail.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/allwinner/
+
+ALLWINNER HARDWARE SPINLOCK SUPPORT
+M: Wilken Gottwalt <wilken.gottwalt@posteo.net>
+S: Maintained
+F: Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml
+F: drivers/hwspinlock/sun6i_hwspinlock.c
+
+ALLWINNER THERMAL DRIVER
+M: Vasily Khoruzhick <anarsoul@gmail.com>
+M: Yangtao Li <tiny.windzz@gmail.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/thermal/allwinner,sun8i-a83t-ths.yaml
+F: drivers/thermal/sun8i_thermal.c
+
+ALLWINNER VPU DRIVER
+M: Maxime Ripard <mripard@kernel.org>
+M: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/staging/media/sunxi/cedrus/
+
+ALPHA PORT
+M: Richard Henderson <rth@twiddle.net>
+M: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
+M: Matt Turner <mattst88@gmail.com>
+L: linux-alpha@vger.kernel.org
+S: Odd Fixes
+F: arch/alpha/
+
+ALPS PS/2 TOUCHPAD DRIVER
+R: Pali Rohár <pali@kernel.org>
+F: drivers/input/mouse/alps.*
+
+ALTERA I2C CONTROLLER DRIVER
+M: Thor Thayer <thor.thayer@linux.intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-altera.txt
+F: drivers/i2c/busses/i2c-altera.c
+
+ALTERA MAILBOX DRIVER
+M: Joyce Ooi <joyce.ooi@intel.com>
+S: Maintained
+F: drivers/mailbox/mailbox-altera.c
+
+ALTERA MSGDMA IP CORE DRIVER
+M: Olivier Dautricourt <olivier.dautricourt@orolia.com>
+R: Stefan Roese <sr@denx.de>
+L: dmaengine@vger.kernel.org
+S: Odd Fixes
+F: Documentation/devicetree/bindings/dma/altr,msgdma.yaml
+F: drivers/dma/altera-msgdma.c
+
+ALTERA PIO DRIVER
+M: Mun Yew Tham <mun.yew.tham@intel.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-altera.c
+
+ALTERA SYSTEM MANAGER DRIVER
+M: Thor Thayer <thor.thayer@linux.intel.com>
+S: Maintained
+F: drivers/mfd/altera-sysmgr.c
+F: include/linux/mfd/altera-sysmgr.h
+
+ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
+M: Thor Thayer <thor.thayer@linux.intel.com>
+S: Maintained
+F: drivers/gpio/gpio-altera-a10sr.c
+F: drivers/mfd/altera-a10sr.c
+F: drivers/reset/reset-a10sr.c
+F: include/dt-bindings/reset/altr,rst-mgr-a10sr.h
+F: include/linux/mfd/altera-a10sr.h
+
+ALTERA TRIPLE SPEED ETHERNET DRIVER
+M: Joyce Ooi <joyce.ooi@intel.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/altera/
+
+ALTERA UART/JTAG UART SERIAL DRIVERS
+M: Tobias Klauser <tklauser@distanz.ch>
+L: linux-serial@vger.kernel.org
+S: Maintained
+F: drivers/tty/serial/altera_jtaguart.c
+F: drivers/tty/serial/altera_uart.c
+F: include/linux/altera_jtaguart.h
+F: include/linux/altera_uart.h
+
+AMAZON ANNAPURNA LABS FIC DRIVER
+M: Talel Shenhar <talel@amazon.com>
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/amazon,al-fic.txt
+F: drivers/irqchip/irq-al-fic.c
+
+AMAZON ANNAPURNA LABS MEMORY CONTROLLER EDAC
+M: Talel Shenhar <talel@amazon.com>
+M: Talel Shenhar <talelshenhar@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml
+F: drivers/edac/al_mc_edac.c
+
+AMAZON ANNAPURNA LABS THERMAL MMIO DRIVER
+M: Talel Shenhar <talel@amazon.com>
+S: Maintained
+F: Documentation/devicetree/bindings/thermal/amazon,al-thermal.txt
+F: drivers/thermal/thermal_mmio.c
+
+AMAZON ETHERNET DRIVERS
+M: Netanel Belgazal <netanel@amazon.com>
+M: Arthur Kiyanovski <akiyano@amazon.com>
+R: Guy Tzalik <gtzalik@amazon.com>
+R: Saeed Bishara <saeedb@amazon.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/ethernet/amazon/ena.rst
+F: drivers/net/ethernet/amazon/
+
+AMAZON RDMA EFA DRIVER
+M: Gal Pressman <galpress@amazon.com>
+R: Yossi Leybovich <sleybo@amazon.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/hw/efa/
+F: include/uapi/rdma/efa-abi.h
+
+AMD CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER
+M: Tom Lendacky <thomas.lendacky@amd.com>
+M: John Allen <john.allen@amd.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+F: drivers/crypto/ccp/
+F: include/linux/ccp.h
+
+AMD CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER - SEV SUPPORT
+M: Brijesh Singh <brijesh.singh@amd.com>
+M: Tom Lendacky <thomas.lendacky@amd.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+F: drivers/crypto/ccp/sev*
+F: include/uapi/linux/psp-sev.h
+
+AMD DISPLAY CORE
+M: Harry Wentland <harry.wentland@amd.com>
+M: Leo Li <sunpeng.li@amd.com>
+L: amd-gfx@lists.freedesktop.org
+S: Supported
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
+F: drivers/gpu/drm/amd/display/
+
+AMD FAM15H PROCESSOR POWER MONITORING DRIVER
+M: Huang Rui <ray.huang@amd.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+F: Documentation/hwmon/fam15h_power.rst
+F: drivers/hwmon/fam15h_power.c
+
+AMD FCH GPIO DRIVER
+M: Enrico Weigelt, metux IT consult <info@metux.net>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-amd-fch.c
+F: include/linux/platform_data/gpio/gpio-amd-fch.h
+
+AMD GEODE CS5536 USB DEVICE CONTROLLER DRIVER
+L: linux-geode@lists.infradead.org (moderated for non-subscribers)
+S: Orphan
+F: drivers/usb/gadget/udc/amd5536udc.*
+
+AMD GEODE PROCESSOR/CHIPSET SUPPORT
+M: Andres Salomon <dilinger@queued.net>
+L: linux-geode@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+W: http://www.amd.com/us-en/ConnectivitySolutions/TechnicalResources/0,,50_2334_2452_11363,00.html
+F: arch/x86/include/asm/geode.h
+F: drivers/char/hw_random/geode-rng.c
+F: drivers/crypto/geode*
+F: drivers/video/fbdev/geode/
+
+AMD IOMMU (AMD-VI)
+M: Joerg Roedel <joro@8bytes.org>
+R: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
+L: iommu@lists.linux-foundation.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
+F: drivers/iommu/amd/
+F: include/linux/amd-iommu.h
+
+AMD KFD
+M: Felix Kuehling <Felix.Kuehling@amd.com>
+L: amd-gfx@lists.freedesktop.org
+S: Supported
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
+F: drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd*.[ch]
+F: drivers/gpu/drm/amd/amdkfd/
+F: drivers/gpu/drm/amd/include/cik_structs.h
+F: drivers/gpu/drm/amd/include/kgd_kfd_interface.h
+F: drivers/gpu/drm/amd/include/v9_structs.h
+F: drivers/gpu/drm/amd/include/vi_structs.h
+F: include/uapi/linux/kfd_ioctl.h
+
+AMD SPI DRIVER
+M: Sanjay R Mehta <sanju.mehta@amd.com>
+S: Maintained
+F: drivers/spi/spi-amd.c
+
+AMD MP2 I2C DRIVER
+M: Elie Morisse <syniurge@gmail.com>
+M: Nehal Shah <nehal-bakulchandra.shah@amd.com>
+M: Shyam Sundar S K <shyam-sundar.s-k@amd.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-amd-mp2*
+
+AMD PMC DRIVER
+M: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/amd-pmc.*
+
+AMD POWERPLAY AND SWSMU
+M: Evan Quan <evan.quan@amd.com>
+L: amd-gfx@lists.freedesktop.org
+S: Supported
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
+F: drivers/gpu/drm/amd/pm/
+
+AMD PTDMA DRIVER
+M: Sanjay R Mehta <sanju.mehta@amd.com>
+L: dmaengine@vger.kernel.org
+S: Maintained
+F: drivers/dma/ptdma/
+
+AMD SEATTLE DEVICE TREE SUPPORT
+M: Brijesh Singh <brijeshkumar.singh@amd.com>
+M: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
+M: Tom Lendacky <thomas.lendacky@amd.com>
+S: Supported
+F: arch/arm64/boot/dts/amd/
+
+AMD XGBE DRIVER
+M: Tom Lendacky <thomas.lendacky@amd.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: arch/arm64/boot/dts/amd/amd-seattle-xgbe*.dtsi
+F: drivers/net/ethernet/amd/xgbe/
+
+AMD SENSOR FUSION HUB DRIVER
+M: Nehal Shah <nehal-bakulchandra.shah@amd.com>
+M: Basavaraj Natikar <basavaraj.natikar@amd.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/hid/amd-sfh*
+F: drivers/hid/amd-sfh-hid/
+
+AMS AS73211 DRIVER
+M: Christian Eggers <ceggers@arri.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/light/ams,as73211.yaml
+F: drivers/iio/light/as73211.c
+
+ANALOG DEVICES INC AD7192 DRIVER
+M: Alexandru Tachici <alexandru.tachici@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
+F: drivers/iio/adc/ad7192.c
+
+ANALOG DEVICES INC AD7292 DRIVER
+M: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
+F: drivers/iio/adc/ad7292.c
+
+ANALOG DEVICES INC AD7768-1 DRIVER
+M: Michael Hennerich <Michael.Hennerich@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
+F: drivers/iio/adc/ad7768-1.c
+
+ANALOG DEVICES INC AD7780 DRIVER
+M: Michael Hennerich <Michael.Hennerich@analog.com>
+M: Renato Lui Geh <renatogeh@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
+F: drivers/iio/adc/ad7780.c
+
+ANALOG DEVICES INC AD9389B DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/ad9389b*
+
+ANALOG DEVICES INC ADGS1408 DRIVER
+M: Mircea Caprioru <mircea.caprioru@analog.com>
+S: Supported
+F: Documentation/devicetree/bindings/mux/adi,adgs1408.txt
+F: drivers/mux/adgs1408.c
+
+ANALOG DEVICES INC ADIN DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/net/adi,adin.yaml
+F: drivers/net/phy/adin.c
+
+ANALOG DEVICES INC ADIS DRIVER LIBRARY
+M: Nuno Sa <nuno.sa@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: drivers/iio/imu/adis.c
+F: include/linux/iio/imu/adis.h
+
+ANALOG DEVICES INC ADIS16460 DRIVER
+M: Dragos Bogdan <dragos.bogdan@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
+F: drivers/iio/imu/adis16460.c
+
+ANALOG DEVICES INC ADIS16475 DRIVER
+M: Nuno Sa <nuno.sa@analog.com>
+L: linux-iio@vger.kernel.org
+W: http://ez.analog.com/community/linux-device-drivers
+S: Supported
+F: drivers/iio/imu/adis16475.c
+F: Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml
+
+ANALOG DEVICES INC ADM1177 DRIVER
+M: Michael Hennerich <Michael.Hennerich@analog.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/hwmon/adi,adm1177.yaml
+F: drivers/hwmon/adm1177.c
+
+ANALOG DEVICES INC ADP5061 DRIVER
+M: Michael Hennerich <Michael.Hennerich@analog.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/power/supply/adp5061.c
+
+ANALOG DEVICES INC ADV7180 DRIVER
+M: Lars-Peter Clausen <lars@metafoo.de>
+L: linux-media@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/media/i2c/adv7180.c
+F: Documentation/devicetree/bindings/media/i2c/adv7180.yaml
+
+ANALOG DEVICES INC ADV748X DRIVER
+M: Kieran Bingham <kieran.bingham@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/adv748x/*
+
+ANALOG DEVICES INC ADV7511 DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/adv7511*
+
+ANALOG DEVICES INC ADV7604 DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/adv7604*
+F: Documentation/devicetree/bindings/media/i2c/adv7604.yaml
+
+ANALOG DEVICES INC ADV7842 DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/adv7842*
+
+ANALOG DEVICES INC ADXRS290 DRIVER
+M: Nishant Malpani <nish.malpani25@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: drivers/iio/gyro/adxrs290.c
+F: Documentation/devicetree/bindings/iio/gyroscope/adi,adxrs290.yaml
+
+ANALOG DEVICES INC ASOC CODEC DRIVERS
+M: Lars-Peter Clausen <lars@metafoo.de>
+M: Nuno Sá <nuno.sa@analog.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+W: http://wiki.analog.com/
+W: http://ez.analog.com/community/linux-device-drivers
+F: sound/soc/codecs/ad1*
+F: sound/soc/codecs/ad7*
+F: sound/soc/codecs/adau*
+F: sound/soc/codecs/adav*
+F: sound/soc/codecs/sigmadsp.*
+F: sound/soc/codecs/ssm*
+
+ANALOG DEVICES INC DMA DRIVERS
+M: Lars-Peter Clausen <lars@metafoo.de>
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: drivers/dma/dma-axi-dmac.c
+
+ANALOG DEVICES INC IIO DRIVERS
+M: Lars-Peter Clausen <lars@metafoo.de>
+M: Michael Hennerich <Michael.Hennerich@analog.com>
+S: Supported
+W: http://wiki.analog.com/
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523
+F: Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350
+F: Documentation/devicetree/bindings/iio/*/adi,*
+F: Documentation/devicetree/bindings/iio/dac/adi,ad5758.yaml
+F: drivers/iio/*/ad*
+F: drivers/iio/adc/ltc249*
+F: drivers/iio/amplifiers/hmc425a.c
+F: drivers/staging/iio/*/ad*
+X: drivers/iio/*/adjd*
+
+ANALOGBITS PLL LIBRARIES
+M: Paul Walmsley <paul.walmsley@sifive.com>
+S: Supported
+F: drivers/clk/analogbits/*
+F: include/linux/clk/analogbits*
+
+ANDES ARCHITECTURE
+M: Nick Hu <nickhu@andestech.com>
+M: Greentime Hu <green.hu@gmail.com>
+M: Vincent Chen <deanbo422@gmail.com>
+S: Supported
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux.git
+F: Documentation/devicetree/bindings/interrupt-controller/andestech,ativic32.txt
+F: Documentation/devicetree/bindings/nds32/
+F: arch/nds32/
+N: nds32
+K: nds32
+
+ANDROID CONFIG FRAGMENTS
+M: Rob Herring <robh@kernel.org>
+S: Supported
+F: kernel/configs/android*
+
+ANDROID DRIVERS
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+M: Arve Hjønnevåg <arve@android.com>
+M: Todd Kjos <tkjos@android.com>
+M: Martijn Coenen <maco@android.com>
+M: Joel Fernandes <joel@joelfernandes.org>
+M: Christian Brauner <christian@brauner.io>
+M: Hridya Valsaraju <hridya@google.com>
+M: Suren Baghdasaryan <surenb@google.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
+F: drivers/android/
+F: drivers/staging/android/
+
+ANDROID GOLDFISH PIC DRIVER
+M: Miodrag Dinic <miodrag.dinic@mips.com>
+S: Supported
+F: Documentation/devicetree/bindings/interrupt-controller/google,goldfish-pic.txt
+F: drivers/irqchip/irq-goldfish-pic.c
+
+ANDROID GOLDFISH RTC DRIVER
+M: Jiaxun Yang <jiaxun.yang@flygoat.com>
+S: Supported
+F: Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt
+F: drivers/rtc/rtc-goldfish.c
+
+AOA (Apple Onboard Audio) ALSA DRIVER
+M: Johannes Berg <johannes@sipsolutions.net>
+L: linuxppc-dev@lists.ozlabs.org
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: sound/aoa/
+
+APEX EMBEDDED SYSTEMS STX104 IIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/iio/adc/stx104.c
+
+APM DRIVER
+M: Jiri Kosina <jikos@kernel.org>
+S: Odd fixes
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jikos/apm.git
+F: arch/x86/kernel/apm_32.c
+F: drivers/char/apm-emulation.c
+F: include/linux/apm_bios.h
+F: include/uapi/linux/apm_bios.h
+
+APPARMOR SECURITY MODULE
+M: John Johansen <john.johansen@canonical.com>
+L: apparmor@lists.ubuntu.com (subscribers-only, general discussion)
+S: Supported
+W: wiki.apparmor.net
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor
+F: Documentation/admin-guide/LSM/apparmor.rst
+F: security/apparmor/
+
+APPLE BCM5974 MULTITOUCH DRIVER
+M: Henrik Rydberg <rydberg@bitmath.org>
+L: linux-input@vger.kernel.org
+S: Odd fixes
+F: drivers/input/mouse/bcm5974.c
+
+APPLE DART IOMMU DRIVER
+M: Sven Peter <sven@svenpeter.dev>
+R: Alyssa Rosenzweig <alyssa@rosenzweig.io>
+L: iommu@lists.linux-foundation.org
+S: Maintained
+F: Documentation/devicetree/bindings/iommu/apple,dart.yaml
+F: drivers/iommu/apple-dart.c
+
+APPLE SMC DRIVER
+M: Henrik Rydberg <rydberg@bitmath.org>
+L: linux-hwmon@vger.kernel.org
+S: Odd fixes
+F: drivers/hwmon/applesmc.c
+
+APPLETALK NETWORK LAYER
+L: netdev@vger.kernel.org
+S: Odd fixes
+F: drivers/net/appletalk/
+F: include/linux/atalk.h
+F: include/uapi/linux/atalk.h
+F: net/appletalk/
+
+APPLIED MICRO (APM) X-GENE DEVICE TREE SUPPORT
+M: Khuong Dinh <khuong@os.amperecomputing.com>
+S: Supported
+F: arch/arm64/boot/dts/apm/
+
+APPLIED MICRO (APM) X-GENE SOC EDAC
+M: Khuong Dinh <khuong@os.amperecomputing.com>
+S: Supported
+F: Documentation/devicetree/bindings/edac/apm-xgene-edac.txt
+F: drivers/edac/xgene_edac.c
+
+APPLIED MICRO (APM) X-GENE SOC ETHERNET (V2) DRIVER
+M: Iyappan Subramanian <iyappan@os.amperecomputing.com>
+M: Keyur Chudgar <keyur@os.amperecomputing.com>
+S: Supported
+F: drivers/net/ethernet/apm/xgene-v2/
+
+APPLIED MICRO (APM) X-GENE SOC ETHERNET DRIVER
+M: Iyappan Subramanian <iyappan@os.amperecomputing.com>
+M: Keyur Chudgar <keyur@os.amperecomputing.com>
+M: Quan Nguyen <quan@os.amperecomputing.com>
+S: Supported
+F: Documentation/devicetree/bindings/net/apm-xgene-enet.txt
+F: Documentation/devicetree/bindings/net/apm-xgene-mdio.txt
+F: drivers/net/ethernet/apm/xgene/
+F: drivers/net/mdio/mdio-xgene.c
+
+APPLIED MICRO (APM) X-GENE SOC PMU
+M: Khuong Dinh <khuong@os.amperecomputing.com>
+S: Supported
+F: Documentation/admin-guide/perf/xgene-pmu.rst
+F: Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt
+F: drivers/perf/xgene_pmu.c
+
+APTINA CAMERA SENSOR PLL
+M: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/aptina-pll.*
+
+AQUACOMPUTER D5 NEXT PUMP SENSOR DRIVER
+M: Aleksa Savic <savicaleksa83@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/aquacomputer_d5next.rst
+F: drivers/hwmon/aquacomputer_d5next.c
+
+AQUANTIA ETHERNET DRIVER (atlantic)
+M: Igor Russkikh <irusskikh@marvell.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: https://www.marvell.com/
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: Documentation/networking/device_drivers/ethernet/aquantia/atlantic.rst
+F: drivers/net/ethernet/aquantia/atlantic/
+
+AQUANTIA ETHERNET DRIVER PTP SUBSYSTEM
+M: Egor Pomozov <epomozov@marvell.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.aquantia.com
+F: drivers/net/ethernet/aquantia/atlantic/aq_ptp*
+
+ARASAN NAND CONTROLLER DRIVER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+M: Naga Sureshkumar Relli <nagasure@xilinx.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mtd/arasan,nand-controller.yaml
+F: drivers/mtd/nand/raw/arasan-nand-controller.c
+
+ARC FRAMEBUFFER DRIVER
+M: Jaya Kumar <jayalk@intworks.biz>
+S: Maintained
+F: drivers/video/fbdev/arcfb.c
+F: drivers/video/fbdev/core/fb_defio.c
+
+ARC PGU DRM DRIVER
+M: Alexey Brodkin <abrodkin@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/display/snps,arcpgu.txt
+F: drivers/gpu/drm/tiny/arcpgu.c
+
+ARCNET NETWORK LAYER
+M: Michael Grzeschik <m.grzeschik@pengutronix.de>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/arcnet/
+F: include/uapi/linux/if_arcnet.h
+
+ARM ARCHITECTED TIMER DRIVER
+M: Mark Rutland <mark.rutland@arm.com>
+M: Marc Zyngier <maz@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/include/asm/arch_timer.h
+F: arch/arm64/include/asm/arch_timer.h
+F: drivers/clocksource/arm_arch_timer.c
+
+ARM HDLCD DRM DRIVER
+M: Liviu Dudau <liviu.dudau@arm.com>
+S: Supported
+F: Documentation/devicetree/bindings/display/arm,hdlcd.txt
+F: drivers/gpu/drm/arm/hdlcd_*
+
+ARM INTEGRATOR, VERSATILE AND REALVIEW SUPPORT
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/arm,integrator.yaml
+F: Documentation/devicetree/bindings/arm/arm,realview.yaml
+F: Documentation/devicetree/bindings/arm/arm,versatile.yaml
+F: Documentation/devicetree/bindings/arm/arm,vexpress-juno.yaml
+F: Documentation/devicetree/bindings/auxdisplay/arm,versatile-lcd.yaml
+F: Documentation/devicetree/bindings/clock/arm,syscon-icst.yaml
+F: Documentation/devicetree/bindings/i2c/i2c-versatile.txt
+F: Documentation/devicetree/bindings/interrupt-controller/arm,versatile-fpga-irq.txt
+F: Documentation/devicetree/bindings/mtd/arm-versatile.txt
+F: arch/arm/boot/dts/arm-realview-*
+F: arch/arm/boot/dts/integrator*
+F: arch/arm/boot/dts/versatile*
+F: arch/arm/mach-integrator/
+F: arch/arm/mach-realview/
+F: arch/arm/mach-versatile/
+F: arch/arm/plat-versatile/
+F: drivers/bus/arm-integrator-lm.c
+F: drivers/clk/versatile/
+F: drivers/i2c/busses/i2c-versatile.c
+F: drivers/irqchip/irq-versatile-fpga.c
+F: drivers/mtd/maps/physmap-versatile.*
+F: drivers/power/reset/arm-versatile-reboot.c
+F: drivers/soc/versatile/
+
+ARM KOMEDA DRM-KMS DRIVER
+M: James (Qian) Wang <james.qian.wang@arm.com>
+M: Liviu Dudau <liviu.dudau@arm.com>
+M: Mihail Atanassov <mihail.atanassov@arm.com>
+L: Mali DP Maintainers <malidp@foss.arm.com>
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/arm,komeda.txt
+F: Documentation/gpu/komeda-kms.rst
+F: drivers/gpu/drm/arm/display/include/
+F: drivers/gpu/drm/arm/display/komeda/
+
+ARM MALI PANFROST DRM DRIVER
+M: Rob Herring <robh@kernel.org>
+M: Tomeu Vizoso <tomeu.vizoso@collabora.com>
+R: Steven Price <steven.price@arm.com>
+R: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/panfrost/
+F: include/uapi/drm/panfrost_drm.h
+
+ARM MALI-DP DRM DRIVER
+M: Liviu Dudau <liviu.dudau@arm.com>
+M: Brian Starkey <brian.starkey@arm.com>
+L: Mali DP Maintainers <malidp@foss.arm.com>
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/arm,malidp.txt
+F: Documentation/gpu/afbc.rst
+F: drivers/gpu/drm/arm/
+
+ARM MFM AND FLOPPY DRIVERS
+M: Ian Molton <spyro@f2s.com>
+S: Maintained
+F: arch/arm/include/asm/floppy.h
+F: arch/arm/mach-rpc/floppydma.S
+
+ARM PMU PROFILING AND DEBUGGING
+M: Will Deacon <will@kernel.org>
+M: Mark Rutland <mark.rutland@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/pmu.yaml
+F: Documentation/devicetree/bindings/perf/
+F: arch/arm*/include/asm/hw_breakpoint.h
+F: arch/arm*/include/asm/perf_event.h
+F: arch/arm*/kernel/hw_breakpoint.c
+F: arch/arm*/kernel/perf_*
+F: drivers/perf/
+F: include/linux/perf/arm_pmu.h
+
+ARM PORT
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Odd Fixes
+W: http://www.armlinux.org.uk/
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git
+F: arch/arm/
+X: arch/arm/boot/dts/
+
+ARM PRIMECELL AACI PL041 DRIVER
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: sound/arm/aaci.*
+
+ARM PRIMECELL BUS SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: drivers/amba/
+F: include/linux/amba/bus.h
+
+ARM PRIMECELL PL35X NAND CONTROLLER DRIVER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+M: Naga Sureshkumar Relli <nagasure@xilinx.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml
+F: drivers/mtd/nand/raw/pl35x-nand-controller.c
+
+ARM PRIMECELL PL35X SMC DRIVER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+M: Naga Sureshkumar Relli <nagasure@xilinx.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/memory-controllers/arm,pl353-smc.yaml
+F: drivers/memory/pl353-smc.c
+
+ARM PRIMECELL CLCD PL110 DRIVER
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: drivers/video/fbdev/amba-clcd.*
+
+ARM PRIMECELL KMI PL050 DRIVER
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: drivers/input/serio/ambakmi.*
+F: include/linux/amba/kmi.h
+
+ARM PRIMECELL MMCI PL180/1 DRIVER
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: drivers/mmc/host/mmci.*
+F: include/linux/amba/mmci.h
+
+ARM PRIMECELL SSP PL022 SPI DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/spi/spi-pl022.yaml
+F: drivers/spi/spi-pl022.c
+
+ARM PRIMECELL UART PL010 AND PL011 DRIVERS
+M: Russell King <linux@armlinux.org.uk>
+S: Odd Fixes
+F: drivers/tty/serial/amba-pl01*.c
+F: include/linux/amba/serial.h
+
+ARM PRIMECELL VIC PL190/PL192 DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt
+F: drivers/irqchip/irq-vic.c
+
+ARM SMC WATCHDOG DRIVER
+M: Julius Werner <jwerner@chromium.org>
+R: Evan Benn <evanbenn@chromium.org>
+S: Maintained
+F: Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
+F: drivers/watchdog/arm_smc_wdt.c
+
+ARM SMMU DRIVERS
+M: Will Deacon <will@kernel.org>
+R: Robin Murphy <robin.murphy@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/iommu/arm,smmu*
+F: drivers/iommu/arm/
+F: drivers/iommu/io-pgtable-arm*
+
+ARM AND ARM64 SoC SUB-ARCHITECTURES (COMMON PARTS)
+M: Arnd Bergmann <arnd@arndb.de>
+M: Olof Johansson <olof@lixom.net>
+M: soc@kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git
+F: arch/arm/boot/dts/Makefile
+F: arch/arm64/boot/dts/Makefile
+
+ARM SUB-ARCHITECTURES
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git
+F: arch/arm/mach-*/
+F: arch/arm/plat-*/
+
+ARM/ACTIONS SEMI ARCHITECTURE
+M: Andreas Färber <afaerber@suse.de>
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-actions@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/actions.yaml
+F: Documentation/devicetree/bindings/clock/actions,owl-cmu.txt
+F: Documentation/devicetree/bindings/dma/owl-dma.yaml
+F: Documentation/devicetree/bindings/i2c/i2c-owl.yaml
+F: Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.yaml
+F: Documentation/devicetree/bindings/mmc/owl-mmc.yaml
+F: Documentation/devicetree/bindings/net/actions,owl-emac.yaml
+F: Documentation/devicetree/bindings/pinctrl/actions,*
+F: Documentation/devicetree/bindings/power/actions,owl-sps.txt
+F: Documentation/devicetree/bindings/timer/actions,owl-timer.txt
+F: arch/arm/boot/dts/owl-*
+F: arch/arm/mach-actions/
+F: arch/arm64/boot/dts/actions/
+F: drivers/clk/actions/
+F: drivers/clocksource/timer-owl*
+F: drivers/dma/owl-dma.c
+F: drivers/i2c/busses/i2c-owl.c
+F: drivers/irqchip/irq-owl-sirq.c
+F: drivers/mmc/host/owl-mmc.c
+F: drivers/net/ethernet/actions/
+F: drivers/pinctrl/actions/*
+F: drivers/soc/actions/
+F: include/dt-bindings/power/owl-*
+F: include/dt-bindings/reset/actions,*
+F: include/linux/soc/actions/
+N: owl
+
+ARM/ADS SPHERE MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/AFEB9260 MACHINE SUPPORT
+M: Sergey Lapin <slapin@ossfans.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/AJECO 1ARM MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/Allwinner SoC Clock Support
+M: Emilio López <emilio@elopez.com.ar>
+S: Maintained
+F: drivers/clk/sunxi/
+
+ARM/Allwinner sunXi SoC support
+M: Maxime Ripard <mripard@kernel.org>
+M: Chen-Yu Tsai <wens@csie.org>
+R: Jernej Skrabec <jernej.skrabec@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git
+L: linux-sunxi@lists.linux.dev
+F: arch/arm/mach-sunxi/
+F: arch/arm64/boot/dts/allwinner/
+F: drivers/clk/sunxi-ng/
+F: drivers/pinctrl/sunxi/
+F: drivers/soc/sunxi/
+N: allwinner
+N: sun[x456789]i
+N: sun50i
+
+ARM/Amlogic Meson SoC CLOCK FRAMEWORK
+M: Neil Armstrong <narmstrong@baylibre.com>
+M: Jerome Brunet <jbrunet@baylibre.com>
+L: linux-amlogic@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/clock/amlogic*
+F: drivers/clk/meson/
+F: include/dt-bindings/clock/gxbb*
+F: include/dt-bindings/clock/meson*
+
+ARM/Amlogic Meson SoC Crypto Drivers
+M: Corentin Labbe <clabbe@baylibre.com>
+L: linux-crypto@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/crypto/amlogic*
+F: drivers/crypto/amlogic/
+
+ARM/Amlogic Meson SoC Sound Drivers
+M: Jerome Brunet <jbrunet@baylibre.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/amlogic*
+F: sound/soc/meson/
+
+ARM/Amlogic Meson SoC support
+M: Neil Armstrong <narmstrong@baylibre.com>
+M: Kevin Hilman <khilman@baylibre.com>
+R: Jerome Brunet <jbrunet@baylibre.com>
+R: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-amlogic@lists.infradead.org
+S: Maintained
+W: http://linux-meson.com/
+F: arch/arm/boot/dts/meson*
+F: arch/arm/mach-meson/
+F: arch/arm64/boot/dts/amlogic/
+F: drivers/mmc/host/meson*
+F: drivers/pinctrl/meson/
+F: drivers/rtc/rtc-meson*
+F: drivers/soc/amlogic/
+N: meson
+
+ARM/Annapurna Labs ALPINE ARCHITECTURE
+M: Tsahee Zidenberg <tsahee@annapurnalabs.com>
+M: Antoine Tenart <atenart@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/alpine*
+F: arch/arm/mach-alpine/
+F: arch/arm64/boot/dts/amazon/
+F: drivers/*/*alpine*
+
+ARM/APPLE MACHINE SUPPORT
+M: Hector Martin <marcan@marcan.st>
+M: Sven Peter <sven@svenpeter.dev>
+R: Alyssa Rosenzweig <alyssa@rosenzweig.io>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: https://asahilinux.org
+B: https://github.com/AsahiLinux/linux/issues
+C: irc://irc.oftc.net/asahi-dev
+T: git https://github.com/AsahiLinux/linux.git
+F: Documentation/devicetree/bindings/arm/apple.yaml
+F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
+F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
+F: arch/arm64/boot/dts/apple/
+F: drivers/irqchip/irq-apple-aic.c
+F: include/dt-bindings/interrupt-controller/apple-aic.h
+F: include/dt-bindings/pinctrl/apple.h
+
+ARM/ARTPEC MACHINE SUPPORT
+M: Jesper Nilsson <jesper.nilsson@axis.com>
+M: Lars Persson <lars.persson@axis.com>
+L: linux-arm-kernel@axis.com
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
+F: arch/arm/boot/dts/artpec6*
+F: arch/arm/mach-artpec
+F: drivers/clk/axis
+F: drivers/crypto/axis
+F: drivers/mmc/host/usdhi6rol0.c
+F: drivers/pinctrl/pinctrl-artpec*
+
+ARM/ASPEED I2C DRIVER
+M: Brendan Higgins <brendanhiggins@google.com>
+R: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+R: Joel Stanley <joel@jms.id.au>
+L: linux-i2c@vger.kernel.org
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
+F: Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2400-i2c-ic.txt
+F: drivers/i2c/busses/i2c-aspeed.c
+F: drivers/irqchip/irq-aspeed-i2c-ic.c
+
+ARM/ASPEED MACHINE SUPPORT
+M: Joel Stanley <joel@jms.id.au>
+R: Andrew Jeffery <andrew@aj.id.au>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+S: Supported
+Q: https://patchwork.ozlabs.org/project/linux-aspeed/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joel/aspeed.git
+F: arch/arm/boot/dts/aspeed-*
+F: arch/arm/mach-aspeed/
+N: aspeed
+
+ARM/BITMAIN ARCHITECTURE
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/bitmain.yaml
+F: Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml
+F: Documentation/devicetree/bindings/pinctrl/bitmain,bm1880-pinctrl.txt
+F: arch/arm64/boot/dts/bitmain/
+F: drivers/clk/clk-bm1880.c
+F: drivers/pinctrl/pinctrl-bm1880.c
+
+ARM/CALXEDA HIGHBANK ARCHITECTURE
+M: Andre Przywara <andre.przywara@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/ecx-*.dts*
+F: arch/arm/boot/dts/highbank.dts
+F: arch/arm/mach-highbank/
+
+ARM/CAVIUM NETWORKS CNS3XXX MACHINE SUPPORT
+M: Krzysztof Halasa <khalasa@piap.pl>
+S: Maintained
+F: arch/arm/mach-cns3xxx/
+
+ARM/CAVIUM THUNDER NETWORK DRIVER
+M: Sunil Goutham <sgoutham@marvell.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/net/ethernet/cavium/thunder/
+
+ARM/CIRRUS LOGIC BK3 MACHINE SUPPORT
+M: Lukasz Majewski <lukma@denx.de>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-ep93xx/ts72xx.c
+
+ARM/CIRRUS LOGIC CLPS711X ARM ARCHITECTURE
+M: Alexander Shiyan <shc_work@mail.ru>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Odd Fixes
+N: clps711x
+
+ARM/CIRRUS LOGIC EDB9315A MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/CIRRUS LOGIC EP93XX ARM ARCHITECTURE
+M: Hartley Sweeten <hsweeten@visionengravers.com>
+M: Alexander Sverdlin <alexander.sverdlin@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-ep93xx/
+F: arch/arm/mach-ep93xx/include/mach/
+
+ARM/CLKDEV SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git clkdev
+F: drivers/clk/clkdev.c
+
+ARM/CONEXANT DIGICOLOR MACHINE SUPPORT
+M: Baruch Siach <baruch@tkos.co.il>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/cx92755*
+N: digicolor
+
+ARM/CONTEC MICRO9 MACHINE SUPPORT
+M: Hubert Feurstein <hubert.feurstein@contec.at>
+S: Maintained
+F: arch/arm/mach-ep93xx/micro9.c
+
+ARM/CORESIGHT FRAMEWORK AND DRIVERS
+M: Mathieu Poirier <mathieu.poirier@linaro.org>
+M: Suzuki K Poulose <suzuki.poulose@arm.com>
+R: Mike Leach <mike.leach@linaro.org>
+R: Leo Yan <leo.yan@linaro.org>
+L: coresight@lists.linaro.org (moderated for non-subscribers)
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git
+F: Documentation/ABI/testing/sysfs-bus-coresight-devices-*
+F: Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt
+F: Documentation/devicetree/bindings/arm/coresight-cti.yaml
+F: Documentation/devicetree/bindings/arm/coresight.txt
+F: Documentation/devicetree/bindings/arm/ete.yaml
+F: Documentation/devicetree/bindings/arm/trbe.yaml
+F: Documentation/trace/coresight/*
+F: drivers/hwtracing/coresight/*
+F: include/dt-bindings/arm/coresight-cti-dt.h
+F: include/linux/coresight*
+F: tools/perf/arch/arm/util/auxtrace.c
+F: tools/perf/arch/arm/util/cs-etm.c
+F: tools/perf/arch/arm/util/cs-etm.h
+F: tools/perf/arch/arm/util/pmu.c
+F: tools/perf/util/cs-etm-decoder/*
+F: tools/perf/util/cs-etm.*
+
+ARM/CORGI MACHINE SUPPORT
+M: Richard Purdie <rpurdie@rpsys.net>
+S: Maintained
+
+ARM/CORTINA SYSTEMS GEMINI ARM ARCHITECTURE
+M: Hans Ulli Kroll <ulli.kroll@googlemail.com>
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/ulli-kroll/linux.git
+F: Documentation/devicetree/bindings/arm/gemini.txt
+F: Documentation/devicetree/bindings/net/cortina,gemini-ethernet.txt
+F: Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt
+F: Documentation/devicetree/bindings/rtc/faraday,ftrtc010.txt
+F: arch/arm/boot/dts/gemini*
+F: arch/arm/mach-gemini/
+F: drivers/crypto/gemini/
+F: drivers/net/ethernet/cortina/
+F: drivers/pinctrl/pinctrl-gemini.c
+F: drivers/rtc/rtc-ftrtc010.c
+
+ARM/CZ.NIC TURRIS SUPPORT
+M: Marek Behún <kabel@kernel.org>
+S: Maintained
+W: https://www.turris.cz/
+F: Documentation/ABI/testing/debugfs-moxtet
+F: Documentation/ABI/testing/sysfs-bus-moxtet-devices
+F: Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm
+F: Documentation/devicetree/bindings/bus/moxtet.txt
+F: Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt
+F: Documentation/devicetree/bindings/gpio/gpio-moxtet.txt
+F: Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml
+F: Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
+F: drivers/bus/moxtet.c
+F: drivers/firmware/turris-mox-rwtm.c
+F: drivers/leds/leds-turris-omnia.c
+F: drivers/mailbox/armada-37xx-rwtm-mailbox.c
+F: drivers/gpio/gpio-moxtet.c
+F: drivers/watchdog/armada_37xx_wdt.c
+F: include/dt-bindings/bus/moxtet.h
+F: include/linux/armada-37xx-rwtm-mailbox.h
+F: include/linux/moxtet.h
+
+ARM/EZX SMARTPHONES (A780, A910, A1200, E680, ROKR E2 and ROKR E6)
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/ezx.c
+
+ARM/FARADAY FA526 PORT
+M: Hans Ulli Kroll <ulli.kroll@googlemail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.berlios.de/gemini-board
+F: arch/arm/mm/*-fa*
+
+ARM/FOOTBRIDGE ARCHITECTURE
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.armlinux.org.uk/
+F: arch/arm/include/asm/hardware/dec21285.h
+F: arch/arm/mach-footbridge/
+
+ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
+M: Shawn Guo <shawnguo@kernel.org>
+M: Sascha Hauer <s.hauer@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+R: Fabio Estevam <festevam@gmail.com>
+R: NXP Linux Team <linux-imx@nxp.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git
+X: drivers/media/i2c/
+N: imx
+N: mxs
+
+ARM/FREESCALE LAYERSCAPE ARM ARCHITECTURE
+M: Shawn Guo <shawnguo@kernel.org>
+M: Li Yang <leoyang.li@nxp.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git
+F: arch/arm/boot/dts/ls1021a*
+F: arch/arm64/boot/dts/freescale/fsl-*
+F: arch/arm64/boot/dts/freescale/qoriq-*
+
+ARM/FREESCALE VYBRID ARM ARCHITECTURE
+M: Shawn Guo <shawnguo@kernel.org>
+M: Sascha Hauer <s.hauer@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+R: Stefan Agner <stefan@agner.ch>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git
+F: arch/arm/boot/dts/vf*
+F: arch/arm/mach-imx/*vf610*
+
+ARM/GLOMATION GESBC9312SX MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/GUMSTIX MACHINE SUPPORT
+M: Steve Sakoman <sakoman@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/H4700 (HP IPAQ HX4700) MACHINE SUPPORT
+M: Philipp Zabel <philipp.zabel@gmail.com>
+M: Paul Parsons <lost.distance@yahoo.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/hx4700.c
+F: arch/arm/mach-pxa/include/mach/hx4700.h
+F: sound/soc/pxa/hx4700.c
+
+ARM/HISILICON SOC SUPPORT
+M: Wei Xu <xuwei5@hisilicon.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+W: http://www.hisilicon.com
+T: git git://github.com/hisilicon/linux-hisi.git
+F: arch/arm/boot/dts/hi3*
+F: arch/arm/boot/dts/hip*
+F: arch/arm/boot/dts/hisi*
+F: arch/arm/mach-hisi/
+F: arch/arm64/boot/dts/hisilicon/
+
+ARM/HP JORNADA 7XX MACHINE SUPPORT
+M: Kristoffer Ericson <kristoffer.ericson@gmail.com>
+S: Maintained
+W: www.jlime.com
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kristoffer/linux-hpc.git
+F: arch/arm/mach-sa1100/include/mach/jornada720.h
+F: arch/arm/mach-sa1100/jornada720.c
+
+ARM/IGEP MACHINE SUPPORT
+M: Enric Balletbo i Serra <eballetbo@gmail.com>
+M: Javier Martinez Canillas <javier@dowhile0.org>
+L: linux-omap@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/omap3-igep*
+
+ARM/INCOME PXA270 SUPPORT
+M: Marek Vasut <marek.vasut@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/colibri-pxa270-income.c
+
+ARM/INTEL IOP32X ARM ARCHITECTURE
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/INTEL IQ81342EX MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/INTEL IXDP2850 MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/INTEL IXP4XX ARM ARCHITECTURE
+M: Linus Walleij <linusw@kernel.org>
+M: Imre Kaloz <kaloz@openwrt.org>
+M: Krzysztof Halasa <khalasa@piap.pl>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/intel-ixp4xx.yaml
+F: Documentation/devicetree/bindings/bus/intel,ixp4xx-expansion-bus-controller.yaml
+F: Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt
+F: Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.yaml
+F: Documentation/devicetree/bindings/timer/intel,ixp4xx-timer.yaml
+F: arch/arm/mach-ixp4xx/
+F: drivers/bus/intel-ixp4xx-eb.c
+F: drivers/clocksource/timer-ixp4xx.c
+F: drivers/crypto/ixp4xx_crypto.c
+F: drivers/gpio/gpio-ixp4xx.c
+F: drivers/irqchip/irq-ixp4xx.c
+F: include/linux/irqchip/irq-ixp4xx.h
+F: include/linux/platform_data/timer-ixp4xx.h
+
+ARM/INTEL KEEMBAY ARCHITECTURE
+M: Paul J. Murphy <paul.j.murphy@intel.com>
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/arm/intel,keembay.yaml
+F: arch/arm64/boot/dts/intel/keembay-evm.dts
+F: arch/arm64/boot/dts/intel/keembay-soc.dtsi
+
+ARM/INTEL RESEARCH IMOTE/STARGATE 2 MACHINE SUPPORT
+M: Jonathan Cameron <jic23@cam.ac.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/stargate2.c
+F: drivers/pcmcia/pxa2xx_stargate2.c
+
+ARM/INTEL XSC3 (MANZANO) ARM CORE
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/IP FABRICS DOUBLE ESPRESSO MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/LG1K ARCHITECTURE
+M: Chanho Min <chanho.min@lge.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm64/boot/dts/lg/
+
+ARM/LOGICPD PXA270 MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/LPC18XX ARCHITECTURE
+M: Vladimir Zapolskiy <vz@mleia.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt
+F: arch/arm/boot/dts/lpc43*
+F: drivers/i2c/busses/i2c-lpc2k.c
+F: drivers/memory/pl172.c
+F: drivers/mtd/spi-nor/controllers/nxp-spifi.c
+F: drivers/rtc/rtc-lpc24xx.c
+N: lpc18xx
+
+ARM/LPC32XX SOC SUPPORT
+M: Vladimir Zapolskiy <vz@mleia.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/vzapolskiy/linux-lpc32xx.git
+F: Documentation/devicetree/bindings/i2c/i2c-pnx.txt
+F: arch/arm/boot/dts/lpc32*
+F: arch/arm/mach-lpc32xx/
+F: drivers/i2c/busses/i2c-pnx.c
+F: drivers/net/ethernet/nxp/lpc_eth.c
+F: drivers/usb/host/ohci-nxp.c
+F: drivers/watchdog/pnx4008_wdt.c
+N: lpc32xx
+
+ARM/MAGICIAN MACHINE SUPPORT
+M: Philipp Zabel <philipp.zabel@gmail.com>
+S: Maintained
+
+ARM/Marvell Dove/MV78xx0/Orion SOC support
+M: Andrew Lunn <andrew@lunn.ch>
+M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+M: Gregory Clement <gregory.clement@bootlin.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu.git
+F: Documentation/devicetree/bindings/soc/dove/
+F: arch/arm/boot/dts/dove*
+F: arch/arm/boot/dts/orion5x*
+F: arch/arm/mach-dove/
+F: arch/arm/mach-mv78xx0/
+F: arch/arm/mach-orion5x/
+F: arch/arm/plat-orion/
+F: drivers/soc/dove/
+
+ARM/Marvell Kirkwood and Armada 370, 375, 38x, 39x, XP, 3700, 7K/8K, CN9130 SOC support
+M: Andrew Lunn <andrew@lunn.ch>
+M: Gregory Clement <gregory.clement@bootlin.com>
+M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu.git
+F: arch/arm/boot/dts/armada*
+F: arch/arm/boot/dts/kirkwood*
+F: arch/arm/configs/mvebu_*_defconfig
+F: arch/arm/mach-mvebu/
+F: arch/arm64/boot/dts/marvell/armada*
+F: arch/arm64/boot/dts/marvell/cn913*
+F: drivers/cpufreq/armada-37xx-cpufreq.c
+F: drivers/cpufreq/armada-8k-cpufreq.c
+F: drivers/cpufreq/mvebu-cpufreq.c
+F: drivers/irqchip/irq-armada-370-xp.c
+F: drivers/irqchip/irq-mvebu-*
+F: drivers/pinctrl/mvebu/
+F: drivers/rtc/rtc-armada38x.c
+
+ARM/Mediatek RTC DRIVER
+M: Eddie Huang <eddie.huang@mediatek.com>
+M: Sean Wang <sean.wang@mediatek.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/rtc/rtc-mt2712.txt
+F: Documentation/devicetree/bindings/rtc/rtc-mt7622.txt
+F: drivers/rtc/rtc-mt2712.c
+F: drivers/rtc/rtc-mt6397.c
+F: drivers/rtc/rtc-mt7622.c
+
+ARM/Mediatek SoC support
+M: Matthias Brugger <matthias.bgg@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: https://mtk.wiki.kernel.org/
+C: irc://chat.freenode.net/linux-mediatek
+F: arch/arm/boot/dts/mt6*
+F: arch/arm/boot/dts/mt7*
+F: arch/arm/boot/dts/mt8*
+F: arch/arm/mach-mediatek/
+F: arch/arm64/boot/dts/mediatek/
+F: drivers/soc/mediatek/
+N: mtk
+N: mt[678]
+K: mediatek
+
+ARM/Mediatek USB3 PHY DRIVER
+M: Chunfeng Yun <chunfeng.yun@mediatek.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/phy/mediatek,*
+F: drivers/phy/mediatek/
+
+ARM/Microchip (AT91) SoC support
+M: Nicolas Ferre <nicolas.ferre@microchip.com>
+M: Alexandre Belloni <alexandre.belloni@bootlin.com>
+M: Ludovic Desroches <ludovic.desroches@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+W: http://www.linux4sam.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux.git
+F: arch/arm/boot/dts/at91*.dts
+F: arch/arm/boot/dts/at91*.dtsi
+F: arch/arm/boot/dts/sama*.dts
+F: arch/arm/boot/dts/sama*.dtsi
+F: arch/arm/include/debug/at91.S
+F: arch/arm/mach-at91/
+F: drivers/memory/atmel*
+F: drivers/watchdog/sama5d4_wdt.c
+F: include/soc/at91/
+X: drivers/input/touchscreen/atmel_mxt_ts.c
+X: drivers/net/wireless/atmel/
+N: at91
+N: atmel
+
+ARM/Microchip Sparx5 SoC support
+M: Lars Povlsen <lars.povlsen@microchip.com>
+M: Steen Hegelund <Steen.Hegelund@microchip.com>
+M: UNGLinuxDriver@microchip.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+T: git git://github.com/microchip-ung/linux-upstream.git
+F: arch/arm64/boot/dts/microchip/
+F: drivers/pinctrl/pinctrl-microchip-sgpio.c
+N: sparx5
+
+Microchip Timer Counter Block (TCB) Capture Driver
+M: Kamel Bouhara <kamel.bouhara@bootlin.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/counter/microchip-tcb-capture.c
+
+ARM/MIOA701 MACHINE SUPPORT
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/mioa701.c
+
+ARM/MStar/Sigmastar Armv7 SoC support
+M: Daniel Palmer <daniel@thingy.jp>
+M: Romain Perier <romain.perier@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://linux-chenxing.org/
+T: git git://github.com/linux-chenxing/linux.git
+F: Documentation/devicetree/bindings/arm/mstar/*
+F: Documentation/devicetree/bindings/clock/mstar,msc313-mpll.yaml
+F: Documentation/devicetree/bindings/gpio/mstar,msc313-gpio.yaml
+F: arch/arm/boot/dts/mstar-*
+F: arch/arm/mach-mstar/
+F: drivers/clk/mstar/
+F: drivers/gpio/gpio-msc313.c
+F: drivers/watchdog/msc313e_wdt.c
+F: include/dt-bindings/clock/mstar-*
+F: include/dt-bindings/gpio/msc313-gpio.h
+
+ARM/NEC MOBILEPRO 900/c MACHINE SUPPORT
+M: Michael Petchkovsky <mkpetch@internode.on.net>
+S: Maintained
+
+ARM/NOMADIK/Ux500 ARCHITECTURES
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git
+F: Documentation/devicetree/bindings/arm/ste-*
+F: Documentation/devicetree/bindings/arm/ux500.yaml
+F: Documentation/devicetree/bindings/arm/ux500/
+F: Documentation/devicetree/bindings/i2c/i2c-nomadik.txt
+F: arch/arm/boot/dts/ste-*
+F: arch/arm/mach-nomadik/
+F: arch/arm/mach-ux500/
+F: drivers/clk/clk-nomadik.c
+F: drivers/clocksource/clksrc-dbx500-prcmu.c
+F: drivers/dma/ste_dma40*
+F: drivers/hwspinlock/u8500_hsem.c
+F: drivers/i2c/busses/i2c-nomadik.c
+F: drivers/iio/adc/ab8500-gpadc.c
+F: drivers/mfd/ab8500*
+F: drivers/mfd/abx500*
+F: drivers/mfd/db8500*
+F: drivers/pinctrl/nomadik/
+F: drivers/rtc/rtc-ab8500.c
+F: drivers/rtc/rtc-pl031.c
+F: drivers/soc/ux500/
+
+ARM/NUVOTON NPCM ARCHITECTURE
+M: Avi Fishman <avifishman70@gmail.com>
+M: Tomer Maimon <tmaimon77@gmail.com>
+M: Tali Perry <tali.perry1@gmail.com>
+R: Patrick Venture <venture@google.com>
+R: Nancy Yuen <yuenn@google.com>
+R: Benjamin Fair <benjaminfair@google.com>
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/*/*/*npcm*
+F: Documentation/devicetree/bindings/*/*npcm*
+F: arch/arm/boot/dts/nuvoton-npcm*
+F: arch/arm/mach-npcm/
+F: drivers/*/*npcm*
+F: drivers/*/*/*npcm*
+F: include/dt-bindings/clock/nuvoton,npcm7xx-clock.h
+
+ARM/NUVOTON WPCM450 ARCHITECTURE
+M: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/*/*wpcm*
+F: arch/arm/boot/dts/nuvoton-wpcm450*
+F: arch/arm/mach-npcm/wpcm450.c
+F: drivers/*/*wpcm*
+
+ARM/OPENMOKO NEO FREERUNNER (GTA02) MACHINE SUPPORT
+L: openmoko-kernel@lists.openmoko.org (subscribers-only)
+S: Orphan
+W: http://wiki.openmoko.org/wiki/Neo_FreeRunner
+F: arch/arm/mach-s3c/gta02.h
+F: arch/arm/mach-s3c/mach-gta02.c
+
+ARM/Orion SoC/Technologic Systems TS-78xx platform support
+M: Alexander Clouter <alex@digriz.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.digriz.org.uk/ts78xx/kernel
+F: arch/arm/mach-orion5x/ts78xx-*
+
+ARM/OXNAS platform support
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-oxnas@groups.io (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/ox8*.dts*
+F: arch/arm/mach-oxnas/
+F: drivers/power/reset/oxnas-restart.c
+N: oxnas
+
+ARM/PALM TREO SUPPORT
+M: Tomas Cech <sleep_walker@suse.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://hackndev.com
+F: arch/arm/mach-pxa/palmtreo.*
+
+ARM/PALMTX,PALMT5,PALMLD,PALMTE2,PALMTC SUPPORT
+M: Marek Vasut <marek.vasut@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://hackndev.com
+F: arch/arm/mach-pxa/include/mach/palmld.h
+F: arch/arm/mach-pxa/include/mach/palmtc.h
+F: arch/arm/mach-pxa/include/mach/palmtx.h
+F: arch/arm/mach-pxa/palmld.c
+F: arch/arm/mach-pxa/palmt5.*
+F: arch/arm/mach-pxa/palmtc.c
+F: arch/arm/mach-pxa/palmte2.*
+F: arch/arm/mach-pxa/palmtx.c
+
+ARM/PALMZ72 SUPPORT
+M: Sergey Lapin <slapin@ossfans.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://hackndev.com
+F: arch/arm/mach-pxa/palmz72.*
+
+ARM/PLEB SUPPORT
+M: Peter Chubb <pleb@gelato.unsw.edu.au>
+S: Maintained
+W: http://www.disy.cse.unsw.edu.au/Hardware/PLEB
+
+ARM/PT DIGITAL BOARD PORT
+M: Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.armlinux.org.uk/
+
+ARM/QUALCOMM SUPPORT
+M: Andy Gross <agross@kernel.org>
+M: Bjorn Andersson <bjorn.andersson@linaro.org>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git
+F: Documentation/devicetree/bindings/*/qcom*
+F: Documentation/devicetree/bindings/soc/qcom/
+F: arch/arm/boot/dts/qcom-*.dts
+F: arch/arm/boot/dts/qcom-*.dtsi
+F: arch/arm/mach-qcom/
+F: arch/arm64/boot/dts/qcom/
+F: drivers/*/*/qcom*
+F: drivers/*/*/qcom/
+F: drivers/*/pm8???-*
+F: drivers/*/qcom*
+F: drivers/*/qcom/
+F: drivers/bluetooth/btqcomsmd.c
+F: drivers/clocksource/timer-qcom.c
+F: drivers/cpuidle/cpuidle-qcom-spm.c
+F: drivers/extcon/extcon-qcom*
+F: drivers/i2c/busses/i2c-qcom-geni.c
+F: drivers/i2c/busses/i2c-qup.c
+F: drivers/iommu/msm*
+F: drivers/mfd/ssbi.c
+F: drivers/mmc/host/mmci_qcom*
+F: drivers/mmc/host/sdhci-msm.c
+F: drivers/pci/controller/dwc/pcie-qcom.c
+F: drivers/phy/qualcomm/
+F: drivers/power/*/msm*
+F: drivers/reset/reset-qcom-*
+F: drivers/scsi/ufs/ufs-qcom*
+F: drivers/spi/spi-geni-qcom.c
+F: drivers/spi/spi-qcom-qspi.c
+F: drivers/spi/spi-qup.c
+F: drivers/tty/serial/msm_serial.c
+F: drivers/usb/dwc3/dwc3-qcom.c
+F: include/dt-bindings/*/qcom*
+F: include/linux/*/qcom*
+F: include/linux/soc/qcom/
+
+ARM/RADISYS ENP2611 MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/RDA MICRO ARCHITECTURE
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-unisoc@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/rda.yaml
+F: Documentation/devicetree/bindings/gpio/gpio-rda.yaml
+F: Documentation/devicetree/bindings/interrupt-controller/rda,8810pl-intc.txt
+F: Documentation/devicetree/bindings/serial/rda,8810pl-uart.txt
+F: Documentation/devicetree/bindings/timer/rda,8810pl-timer.txt
+F: arch/arm/boot/dts/rda8810pl-*
+F: drivers/clocksource/timer-rda.c
+F: drivers/gpio/gpio-rda.c
+F: drivers/irqchip/irq-rda-intc.c
+F: drivers/tty/serial/rda-uart.c
+
+ARM/REALTEK ARCHITECTURE
+M: Andreas Färber <afaerber@suse.de>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-realtek-soc@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/realtek.yaml
+F: arch/arm/boot/dts/rtd*
+F: arch/arm/mach-realtek/
+F: arch/arm64/boot/dts/realtek/
+
+ARM/RENESAS ARM64 ARCHITECTURE
+M: Geert Uytterhoeven <geert+renesas@glider.be>
+M: Magnus Damm <magnus.damm@gmail.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+Q: http://patchwork.kernel.org/project/linux-renesas-soc/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git next
+F: Documentation/devicetree/bindings/arm/renesas.yaml
+F: arch/arm64/boot/dts/renesas/
+F: drivers/soc/renesas/
+F: include/linux/soc/renesas/
+
+ARM/RISCPC ARCHITECTURE
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.armlinux.org.uk/
+F: arch/arm/include/asm/hardware/entry-macro-iomd.S
+F: arch/arm/include/asm/hardware/ioc.h
+F: arch/arm/include/asm/hardware/iomd.h
+F: arch/arm/include/asm/hardware/memc.h
+F: arch/arm/mach-rpc/
+F: drivers/net/ethernet/8390/etherh.c
+F: drivers/net/ethernet/i825xx/ether1*
+F: drivers/net/ethernet/seeq/ether3*
+F: drivers/scsi/arm/
+
+ARM/Rockchip SoC support
+M: Heiko Stuebner <heiko@sntech.de>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git
+F: Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml
+F: Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml
+F: Documentation/devicetree/bindings/spi/spi-rockchip.yaml
+F: arch/arm/boot/dts/rk3*
+F: arch/arm/boot/dts/rv1108*
+F: arch/arm/mach-rockchip/
+F: drivers/*/*/*rockchip*
+F: drivers/*/*rockchip*
+F: drivers/clk/rockchip/
+F: drivers/i2c/busses/i2c-rk3x.c
+F: sound/soc/rockchip/
+N: rockchip
+
+ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-samsung-soc/list/
+F: Documentation/arm/samsung/
+F: Documentation/devicetree/bindings/arm/samsung/
+F: Documentation/devicetree/bindings/power/pd-samsung.yaml
+F: arch/arm/boot/dts/exynos*
+F: arch/arm/boot/dts/s3c*
+F: arch/arm/boot/dts/s5p*
+F: arch/arm/mach-exynos*/
+F: arch/arm/mach-s3c/
+F: arch/arm/mach-s5p*/
+F: arch/arm64/boot/dts/exynos/
+F: drivers/*/*/*s3c24*
+F: drivers/*/*s3c24*
+F: drivers/*/*s3c64xx*
+F: drivers/*/*s5pv210*
+F: drivers/clocksource/samsung_pwm_timer.c
+F: drivers/memory/samsung/
+F: drivers/pwm/pwm-samsung.c
+F: drivers/soc/samsung/
+F: drivers/tty/serial/samsung*
+F: include/clocksource/samsung_pwm.h
+F: include/linux/platform_data/*s3c*
+F: include/linux/serial_s3c.h
+F: include/linux/soc/samsung/
+N: exynos
+N: s3c2410
+N: s3c64xx
+N: s5pv210
+
+ARM/SAMSUNG S5P SERIES 2D GRAPHICS ACCELERATION (G2D) SUPPORT
+M: Andrzej Hajda <a.hajda@samsung.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/s5p-g2d/
+
+ARM/SAMSUNG S5P SERIES HDMI CEC SUBSYSTEM SUPPORT
+M: Marek Szyprowski <m.szyprowski@samsung.com>
+L: linux-samsung-soc@vger.kernel.org
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/s5p-cec.txt
+F: drivers/media/cec/platform/s5p/
+
+ARM/SAMSUNG S5P SERIES JPEG CODEC SUPPORT
+M: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
+M: Jacek Anaszewski <jacek.anaszewski@gmail.com>
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/s5p-jpeg/
+
+ARM/SAMSUNG S5P SERIES Multi Format Codec (MFC) SUPPORT
+M: Andrzej Hajda <a.hajda@samsung.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/s5p-mfc/
+
+ARM/SHMOBILE ARM ARCHITECTURE
+M: Geert Uytterhoeven <geert+renesas@glider.be>
+M: Magnus Damm <magnus.damm@gmail.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+Q: http://patchwork.kernel.org/project/linux-renesas-soc/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git next
+F: Documentation/devicetree/bindings/arm/renesas.yaml
+F: arch/arm/boot/dts/emev2*
+F: arch/arm/boot/dts/gr-peach*
+F: arch/arm/boot/dts/iwg20d-q7*
+F: arch/arm/boot/dts/r7s*
+F: arch/arm/boot/dts/r8a*
+F: arch/arm/boot/dts/r9a*
+F: arch/arm/boot/dts/sh*
+F: arch/arm/configs/shmobile_defconfig
+F: arch/arm/include/debug/renesas-scif.S
+F: arch/arm/mach-shmobile/
+F: drivers/soc/renesas/
+F: include/linux/soc/renesas/
+
+ARM/SOCFPGA ARCHITECTURE
+M: Dinh Nguyen <dinguyen@kernel.org>
+S: Maintained
+W: http://www.rocketboards.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git
+F: arch/arm/boot/dts/socfpga*
+F: arch/arm/configs/socfpga_defconfig
+F: arch/arm/mach-socfpga/
+F: arch/arm64/boot/dts/altera/
+F: arch/arm64/boot/dts/intel/
+
+ARM/SOCFPGA CLOCK FRAMEWORK SUPPORT
+M: Dinh Nguyen <dinguyen@kernel.org>
+S: Maintained
+F: drivers/clk/socfpga/
+
+ARM/SOCFPGA EDAC SUPPORT
+M: Dinh Nguyen <dinguyen@kernel.org>
+S: Maintained
+F: drivers/edac/altera_edac.[ch]
+
+ARM/SPREADTRUM SoC SUPPORT
+M: Orson Zhai <orsonzhai@gmail.com>
+M: Baolin Wang <baolin.wang7@gmail.com>
+M: Chunyan Zhang <zhang.lyra@gmail.com>
+S: Maintained
+F: arch/arm64/boot/dts/sprd
+N: sprd
+N: sc27xx
+N: sc2731
+
+ARM/STI ARCHITECTURE
+M: Patrice Chotard <patrice.chotard@foss.st.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.stlinux.com
+F: Documentation/devicetree/bindings/i2c/i2c-st.txt
+F: arch/arm/boot/dts/sti*
+F: arch/arm/mach-sti/
+F: drivers/ata/ahci_st.c
+F: drivers/char/hw_random/st-rng.c
+F: drivers/clocksource/arm_global_timer.c
+F: drivers/clocksource/clksrc_st_lpc.c
+F: drivers/cpufreq/sti-cpufreq.c
+F: drivers/dma/st_fdma*
+F: drivers/i2c/busses/i2c-st.c
+F: drivers/media/platform/sti/c8sectpfe/
+F: drivers/media/rc/st_rc.c
+F: drivers/mmc/host/sdhci-st.c
+F: drivers/phy/st/phy-miphy28lp.c
+F: drivers/phy/st/phy-stih407-usb.c
+F: drivers/pinctrl/pinctrl-st.c
+F: drivers/remoteproc/st_remoteproc.c
+F: drivers/remoteproc/st_slim_rproc.c
+F: drivers/reset/sti/
+F: drivers/rtc/rtc-st-lpc.c
+F: drivers/tty/serial/st-asc.c
+F: drivers/usb/dwc3/dwc3-st.c
+F: drivers/usb/host/ehci-st.c
+F: drivers/usb/host/ohci-st.c
+F: drivers/watchdog/st_lpc_wdt.c
+F: include/linux/remoteproc/st_slim_rproc.h
+
+ARM/STM32 ARCHITECTURE
+M: Maxime Coquelin <mcoquelin.stm32@gmail.com>
+M: Alexandre Torgue <alexandre.torgue@foss.st.com>
+L: linux-stm32@st-md-mailman.stormreply.com (moderated for non-subscribers)
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next
+F: arch/arm/boot/dts/stm32*
+F: arch/arm/mach-stm32/
+F: drivers/clocksource/armv7m_systick.c
+N: stm32
+N: stm
+
+ARM/Synaptics SoC support
+M: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
+M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/berlin*
+F: arch/arm/mach-berlin/
+F: arch/arm64/boot/dts/synaptics/
+
+ARM/TECHNOLOGIC SYSTEMS TS7250 MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/TEGRA HDMI CEC SUBSYSTEM SUPPORT
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-tegra@vger.kernel.org
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/tegra-cec.txt
+F: drivers/media/cec/platform/tegra/
+
+ARM/TETON BGA MACHINE SUPPORT
+M: "Mark F. Brown" <mark.brown314@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/TEXAS INSTRUMENT AEMIF/EMIF DRIVERS
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/memory/*emif*
+
+ARM/TEXAS INSTRUMENT KEYSTONE ARCHITECTURE
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone.git
+F: arch/arm/boot/dts/keystone-*
+F: arch/arm/mach-keystone/
+
+ARM/TEXAS INSTRUMENT KEYSTONE CLOCK FRAMEWORK
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/clk/keystone/
+
+ARM/TEXAS INSTRUMENT KEYSTONE CLOCKSOURCE
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/clocksource/timer-keystone.c
+
+ARM/TEXAS INSTRUMENT KEYSTONE RESET DRIVER
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/power/reset/keystone-reset.c
+
+ARM/TEXAS INSTRUMENTS K3 ARCHITECTURE
+M: Nishanth Menon <nm@ti.com>
+M: Vignesh Raghavendra <vigneshr@ti.com>
+M: Tero Kristo <kristo@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/arm/ti/k3.yaml
+F: arch/arm64/boot/dts/ti/Makefile
+F: arch/arm64/boot/dts/ti/k3-*
+F: include/dt-bindings/pinctrl/k3.h
+
+ARM/THECUS N2100 MACHINE SUPPORT
+M: Lennert Buytenhek <kernel@wantstofly.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
+ARM/TOSA MACHINE SUPPORT
+M: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+M: Dirk Opfer <dirk@opfer-online.de>
+S: Maintained
+
+ARM/TOSHIBA VISCONTI ARCHITECTURE
+M: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/iwamatsu/linux-visconti.git
+F: Documentation/devicetree/bindings/arm/toshiba.yaml
+F: Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
+F: Documentation/devicetree/bindings/gpio/toshiba,gpio-visconti.yaml
+F: Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
+F: Documentation/devicetree/bindings/pinctrl/toshiba,tmpv7700-pinctrl.yaml
+F: Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
+F: arch/arm64/boot/dts/toshiba/
+F: drivers/net/ethernet/stmicro/stmmac/dwmac-visconti.c
+F: drivers/gpio/gpio-visconti.c
+F: drivers/pci/controller/dwc/pcie-visconti.c
+F: drivers/pinctrl/visconti/
+F: drivers/watchdog/visconti_wdt.c
+N: visconti
+
+ARM/UNIPHIER ARCHITECTURE
+M: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+M: Masami Hiramatsu <mhiramat@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/socionext/uniphier.yaml
+F: Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.yaml
+F: Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yaml
+F: arch/arm/boot/dts/uniphier*
+F: arch/arm/include/asm/hardware/cache-uniphier.h
+F: arch/arm/mach-uniphier/
+F: arch/arm/mm/cache-uniphier.c
+F: arch/arm64/boot/dts/socionext/uniphier*
+F: drivers/bus/uniphier-system-bus.c
+F: drivers/clk/uniphier/
+F: drivers/dma/uniphier-mdmac.c
+F: drivers/gpio/gpio-uniphier.c
+F: drivers/i2c/busses/i2c-uniphier*
+F: drivers/irqchip/irq-uniphier-aidet.c
+F: drivers/mmc/host/uniphier-sd.c
+F: drivers/pinctrl/uniphier/
+F: drivers/reset/reset-uniphier.c
+F: drivers/tty/serial/8250/8250_uniphier.c
+N: uniphier
+
+ARM/VERSATILE EXPRESS PLATFORM
+M: Liviu Dudau <liviu.dudau@arm.com>
+M: Sudeep Holla <sudeep.holla@arm.com>
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: */*/*/vexpress*
+F: */*/vexpress*
+F: arch/arm/boot/dts/vexpress*
+F: arch/arm/mach-vexpress/
+F: arch/arm64/boot/dts/arm/
+F: drivers/clk/versatile/clk-vexpress-osc.c
+F: drivers/clocksource/timer-versatile.c
+N: mps2
+
+ARM/VFP SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.armlinux.org.uk/
+F: arch/arm/vfp/
+
+ARM/VOIPAC PXA270 SUPPORT
+M: Marek Vasut <marek.vasut@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/include/mach/vpac270.h
+F: arch/arm/mach-pxa/vpac270.c
+
+ARM/VT8500 ARM ARCHITECTURE
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Orphan
+F: Documentation/devicetree/bindings/i2c/i2c-wmt.txt
+F: arch/arm/mach-vt8500/
+F: drivers/clocksource/timer-vt8500.c
+F: drivers/i2c/busses/i2c-wmt.c
+F: drivers/mmc/host/wmt-sdmmc.c
+F: drivers/pwm/pwm-vt8500.c
+F: drivers/rtc/rtc-vt8500.c
+F: drivers/tty/serial/vt8500_serial.c
+F: drivers/usb/host/ehci-platform.c
+F: drivers/usb/host/uhci-platform.c
+F: drivers/video/fbdev/vt8500lcdfb.*
+F: drivers/video/fbdev/wm8505fb*
+F: drivers/video/fbdev/wmt_ge_rops.*
+
+ARM/ZIPIT Z2 SUPPORT
+M: Marek Vasut <marek.vasut@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/mach-pxa/include/mach/z2.h
+F: arch/arm/mach-pxa/z2.c
+
+ARM/ZYNQ ARCHITECTURE
+M: Michal Simek <michal.simek@xilinx.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+W: http://wiki.xilinx.com
+T: git https://github.com/Xilinx/linux-xlnx.git
+F: Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml
+F: Documentation/devicetree/bindings/i2c/xlnx,xps-iic-2.00.a.yaml
+F: Documentation/devicetree/bindings/spi/xlnx,zynq-qspi.yaml
+F: arch/arm/mach-zynq/
+F: drivers/clocksource/timer-cadence-ttc.c
+F: drivers/cpuidle/cpuidle-zynq.c
+F: drivers/edac/synopsys_edac.c
+F: drivers/i2c/busses/i2c-cadence.c
+F: drivers/i2c/busses/i2c-xiic.c
+F: drivers/mmc/host/sdhci-of-arasan.c
+N: zynq
+N: xilinx
+
+ARM64 PORT (AARCH64 ARCHITECTURE)
+M: Catalin Marinas <catalin.marinas@arm.com>
+M: Will Deacon <will@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
+F: Documentation/arm64/
+F: arch/arm64/
+F: tools/testing/selftests/arm64/
+X: arch/arm64/boot/dts/
+
+ARROW SPEEDCHIPS XRS7000 SERIES ETHERNET SWITCH DRIVER
+M: George McCollister <george.mccollister@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
+F: drivers/net/dsa/xrs700x/*
+F: net/dsa/tag_xrs700x.c
+
+AS3645A LED FLASH CONTROLLER DRIVER
+M: Sakari Ailus <sakari.ailus@iki.fi>
+L: linux-leds@vger.kernel.org
+S: Maintained
+F: drivers/leds/flash/leds-as3645a.c
+
+ASAHI KASEI AK7375 LENS VOICE COIL DRIVER
+M: Tianshu Qiu <tian.shu.qiu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ak7375.txt
+F: drivers/media/i2c/ak7375.c
+
+ASAHI KASEI AK8974 DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://www.akm.com/
+F: drivers/iio/magnetometer/ak8974.c
+
+ASC7621 HARDWARE MONITOR DRIVER
+M: George Joseph <george.joseph@fairview5.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/asc7621.rst
+F: drivers/hwmon/asc7621.c
+
+ASPEED PINCTRL DRIVERS
+M: Andrew Jeffery <andrew@aj.id.au>
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/aspeed,*
+F: drivers/pinctrl/aspeed/
+
+ASPEED SCU INTERRUPT CONTROLLER DRIVER
+M: Eddie James <eajames@linux.ibm.com>
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
+F: drivers/irqchip/irq-aspeed-scu-ic.c
+F: include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
+
+ASPEED SD/MMC DRIVER
+M: Andrew Jeffery <andrew@aj.id.au>
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/mmc/aspeed,sdhci.yaml
+F: drivers/mmc/host/sdhci-of-aspeed*
+
+ASPEED VIDEO ENGINE DRIVER
+M: Eddie James <eajames@linux.ibm.com>
+L: linux-media@vger.kernel.org
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/media/aspeed-video.txt
+F: drivers/media/platform/aspeed-video.c
+
+ASUS NOTEBOOKS AND EEEPC ACPI/WMI EXTRAS DRIVERS
+M: Corentin Chary <corentin.chary@gmail.com>
+L: acpi4asus-user@lists.sourceforge.net
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://acpi4asus.sf.net
+F: drivers/platform/x86/asus*.c
+F: drivers/platform/x86/eeepc*.c
+
+ASUS WIRELESS RADIO CONTROL DRIVER
+M: João Paulo Rechi Vita <jprvita@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/asus-wireless.c
+
+ASYMMETRIC KEYS
+M: David Howells <dhowells@redhat.com>
+L: keyrings@vger.kernel.org
+S: Maintained
+F: Documentation/crypto/asymmetric-keys.rst
+F: crypto/asymmetric_keys/
+F: include/crypto/pkcs7.h
+F: include/crypto/public_key.h
+F: include/linux/verification.h
+
+ASYNCHRONOUS TRANSFERS/TRANSFORMS (IOAT) API
+R: Dan Williams <dan.j.williams@intel.com>
+S: Odd fixes
+W: http://sourceforge.net/projects/xscaleiop
+F: Documentation/crypto/async-tx-api.rst
+F: crypto/async_tx/
+F: include/linux/async_tx.h
+
+AT24 EEPROM DRIVER
+M: Bartosz Golaszewski <brgl@bgdev.pl>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
+F: Documentation/devicetree/bindings/eeprom/at24.yaml
+F: drivers/misc/eeprom/at24.c
+
+ATA OVER ETHERNET (AOE) DRIVER
+M: "Justin Sanders" <justin@coraid.com>
+S: Supported
+W: http://www.openaoe.org/
+F: Documentation/admin-guide/aoe/
+F: drivers/block/aoe/
+
+ATC260X PMIC MFD DRIVER
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+M: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
+L: linux-actions@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/actions,atc260x.yaml
+F: drivers/input/misc/atc260x-onkey.c
+F: drivers/mfd/atc260*
+F: drivers/power/reset/atc260x-poweroff.c
+F: drivers/regulator/atc260x-regulator.c
+F: include/linux/mfd/atc260x/*
+
+ATHEROS 71XX/9XXX GPIO DRIVER
+M: Alban Bedel <albeu@free.fr>
+S: Maintained
+W: https://github.com/AlbanBedel/linux
+T: git git://github.com/AlbanBedel/linux
+F: Documentation/devicetree/bindings/gpio/gpio-ath79.txt
+F: drivers/gpio/gpio-ath79.c
+
+ATHEROS 71XX/9XXX USB PHY DRIVER
+M: Alban Bedel <albeu@free.fr>
+S: Maintained
+W: https://github.com/AlbanBedel/linux
+T: git git://github.com/AlbanBedel/linux
+F: Documentation/devicetree/bindings/phy/phy-ath79-usb.txt
+F: drivers/phy/qualcomm/phy-ath79-usb.c
+
+ATHEROS ATH GENERIC UTILITIES
+M: Kalle Valo <kvalo@codeaurora.org>
+L: linux-wireless@vger.kernel.org
+S: Supported
+F: drivers/net/wireless/ath/*
+
+ATHEROS ATH5K WIRELESS DRIVER
+M: Jiri Slaby <jirislaby@kernel.org>
+M: Nick Kossifidis <mickflemm@gmail.com>
+M: Luis Chamberlain <mcgrof@kernel.org>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/en/users/Drivers/ath5k
+F: drivers/net/wireless/ath/ath5k/
+
+ATHEROS ATH6KL WIRELESS DRIVER
+M: Kalle Valo <kvalo@codeaurora.org>
+L: linux-wireless@vger.kernel.org
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/ath6kl
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
+F: drivers/net/wireless/ath/ath6kl/
+
+ATI_REMOTE2 DRIVER
+M: Ville Syrjala <syrjala@sci.fi>
+S: Maintained
+F: drivers/input/misc/ati_remote2.c
+
+ATK0110 HWMON DRIVER
+M: Luca Tettamanti <kronos.it@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/asus_atk0110.c
+
+ATLX ETHERNET DRIVERS
+M: Chris Snook <chris.snook@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://sourceforge.net/projects/atl1
+W: http://atl1.sourceforge.net
+F: drivers/net/ethernet/atheros/
+
+ATM
+M: Chas Williams <3chas3@gmail.com>
+L: linux-atm-general@lists.sourceforge.net (moderated for non-subscribers)
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://linux-atm.sourceforge.net
+F: drivers/atm/
+F: include/linux/atm*
+F: include/uapi/linux/atm*
+
+ATMEL MACB ETHERNET DRIVER
+M: Nicolas Ferre <nicolas.ferre@microchip.com>
+M: Claudiu Beznea <claudiu.beznea@microchip.com>
+S: Supported
+F: drivers/net/ethernet/cadence/
+
+ATMEL MAXTOUCH DRIVER
+M: Nick Dyer <nick@shmanahar.org>
+S: Maintained
+T: git git://github.com/ndyer/linux.git
+F: Documentation/devicetree/bindings/input/atmel,maxtouch.yaml
+F: drivers/input/touchscreen/atmel_mxt_ts.c
+
+ATMEL WIRELESS DRIVER
+M: Simon Kelley <simon@thekelleys.org.uk>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: http://www.thekelleys.org.uk/atmel
+W: http://atmelwlandriver.sourceforge.net/
+F: drivers/net/wireless/atmel/atmel*
+
+ATOMIC INFRASTRUCTURE
+M: Will Deacon <will@kernel.org>
+M: Peter Zijlstra <peterz@infradead.org>
+R: Boqun Feng <boqun.feng@gmail.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: arch/*/include/asm/atomic*.h
+F: include/*/atomic*.h
+F: include/linux/refcount.h
+F: Documentation/atomic_*.txt
+F: scripts/atomic/
+
+ATTO EXPRESSSAS SAS/SATA RAID SCSI DRIVER
+M: Bradley Grove <linuxdrivers@attotech.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.attotech.com
+F: drivers/scsi/esas2r
+
+ATUSB IEEE 802.15.4 RADIO DRIVER
+M: Stefan Schmidt <stefan@datenfreihafen.org>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+F: drivers/net/ieee802154/at86rf230.h
+F: drivers/net/ieee802154/atusb.c
+F: drivers/net/ieee802154/atusb.h
+
+AUDIT SUBSYSTEM
+M: Paul Moore <paul@paul-moore.com>
+M: Eric Paris <eparis@redhat.com>
+L: linux-audit@redhat.com (moderated for non-subscribers)
+S: Supported
+W: https://github.com/linux-audit
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit.git
+F: include/asm-generic/audit_*.h
+F: include/linux/audit.h
+F: include/uapi/linux/audit.h
+F: kernel/audit*
+F: lib/*audit.c
+
+AUXILIARY DISPLAY DRIVERS
+M: Miguel Ojeda <ojeda@kernel.org>
+S: Maintained
+F: drivers/auxdisplay/
+F: include/linux/cfag12864b.h
+
+AVIA HX711 ANALOG DIGITAL CONVERTER IIO DRIVER
+M: Andreas Klinger <ak@it-klinger.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml
+F: drivers/iio/adc/hx711.c
+
+AX.25 NETWORK LAYER
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://www.linux-ax25.org/
+F: include/net/ax25.h
+F: include/uapi/linux/ax25.h
+F: net/ax25/
+
+AXENTIA ARM DEVICES
+M: Peter Rosin <peda@axentia.se>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/at91-linea.dtsi
+F: arch/arm/boot/dts/at91-natte.dtsi
+F: arch/arm/boot/dts/at91-nattis-2-natte-2.dts
+F: arch/arm/boot/dts/at91-tse850-3.dts
+
+AXENTIA ASOC DRIVERS
+M: Peter Rosin <peda@axentia.se>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/axentia,*
+F: sound/soc/atmel/tse850-pcm5142.c
+
+AXI-FAN-CONTROL HARDWARE MONITOR DRIVER
+M: Nuno Sá <nuno.sa@analog.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/hwmon/adi,axi-fan-control.yaml
+F: drivers/hwmon/axi-fan-control.c
+
+AXXIA I2C CONTROLLER
+M: Krzysztof Adamski <krzysztof.adamski@nokia.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-axxia.txt
+F: drivers/i2c/busses/i2c-axxia.c
+
+AZ6007 DVB DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/az6007.c
+
+AZTECH FM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-aztech*
+
+B43 WIRELESS DRIVER
+L: linux-wireless@vger.kernel.org
+L: b43-dev@lists.infradead.org
+S: Odd Fixes
+W: https://wireless.wiki.kernel.org/en/users/Drivers/b43
+F: drivers/net/wireless/broadcom/b43/
+
+B43LEGACY WIRELESS DRIVER
+M: Larry Finger <Larry.Finger@lwfinger.net>
+L: linux-wireless@vger.kernel.org
+L: b43-dev@lists.infradead.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/en/users/Drivers/b43
+F: drivers/net/wireless/broadcom/b43legacy/
+
+BACKLIGHT CLASS/SUBSYSTEM
+M: Lee Jones <lee.jones@linaro.org>
+M: Daniel Thompson <daniel.thompson@linaro.org>
+M: Jingoo Han <jingoohan1@gmail.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git
+F: Documentation/ABI/stable/sysfs-class-backlight
+F: Documentation/ABI/testing/sysfs-class-backlight
+F: Documentation/devicetree/bindings/leds/backlight
+F: drivers/video/backlight/
+F: include/linux/backlight.h
+F: include/linux/pwm_backlight.h
+
+BATMAN ADVANCED
+M: Marek Lindner <mareklindner@neomailbox.ch>
+M: Simon Wunderlich <sw@simonwunderlich.de>
+M: Antonio Quartulli <a@unstable.cc>
+M: Sven Eckelmann <sven@narfation.org>
+L: b.a.t.m.a.n@lists.open-mesh.org (moderated for non-subscribers)
+S: Maintained
+W: https://www.open-mesh.org/
+Q: https://patchwork.open-mesh.org/project/batman/list/
+B: https://www.open-mesh.org/projects/batman-adv/issues
+C: ircs://irc.hackint.org/batadv
+T: git https://git.open-mesh.org/linux-merge.git
+F: Documentation/networking/batman-adv.rst
+F: include/uapi/linux/batadv_packet.h
+F: include/uapi/linux/batman_adv.h
+F: net/batman-adv/
+
+BAYCOM/HDLCDRV DRIVERS FOR AX.25
+M: Thomas Sailer <t.sailer@alumni.ethz.ch>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://www.baycom.org/~tom/ham/ham.html
+F: drivers/net/hamradio/baycom*
+
+BCACHE (BLOCK LAYER CACHE)
+M: Coly Li <colyli@suse.de>
+M: Kent Overstreet <kent.overstreet@gmail.com>
+L: linux-bcache@vger.kernel.org
+S: Maintained
+W: http://bcache.evilpiepirate.org
+C: irc://irc.oftc.net/bcache
+F: drivers/md/bcache/
+
+BDISP ST MEDIA DRIVER
+M: Fabien Dessenne <fabien.dessenne@foss.st.com>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/platform/sti/bdisp
+
+BECKHOFF CX5020 ETHERCAT MASTER DRIVER
+M: Dariusz Marcinkiewicz <reksio@newterm.pl>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/ec_bhf.c
+
+BEFS FILE SYSTEM
+M: Luis de Bethencourt <luisbg@kernel.org>
+M: Salah Triki <salah.triki@gmail.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/luisbg/linux-befs.git
+F: Documentation/filesystems/befs.rst
+F: fs/befs/
+
+BFQ I/O SCHEDULER
+M: Paolo Valente <paolo.valente@linaro.org>
+M: Jens Axboe <axboe@kernel.dk>
+L: linux-block@vger.kernel.org
+S: Maintained
+F: Documentation/block/bfq-iosched.rst
+F: block/bfq-*
+
+BFS FILE SYSTEM
+M: "Tigran A. Aivazian" <aivazian.tigran@gmail.com>
+S: Maintained
+F: Documentation/filesystems/bfs.rst
+F: fs/bfs/
+F: include/uapi/linux/bfs_fs.h
+
+BITMAP API
+M: Yury Norov <yury.norov@gmail.com>
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+R: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+S: Maintained
+F: include/asm-generic/bitops/find.h
+F: include/linux/bitmap.h
+F: lib/bitmap.c
+F: lib/find_bit.c
+F: lib/find_bit_benchmark.c
+F: lib/test_bitmap.c
+F: tools/include/asm-generic/bitops/find.h
+F: tools/include/linux/bitmap.h
+F: tools/lib/bitmap.c
+F: tools/lib/find_bit.c
+
+BLINKM RGB LED DRIVER
+M: Jan-Simon Moeller <jansimon.moeller@gmx.de>
+S: Maintained
+F: drivers/leds/leds-blinkm.c
+
+BLOCK LAYER
+M: Jens Axboe <axboe@kernel.dk>
+L: linux-block@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
+F: block/
+F: drivers/block/
+F: include/linux/blk*
+F: kernel/trace/blktrace.c
+F: lib/sbitmap.c
+
+BLOCK2MTD DRIVER
+M: Joern Engel <joern@lazybastard.org>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/devices/block2mtd.c
+
+BLUETOOTH DRIVERS
+M: Marcel Holtmann <marcel@holtmann.org>
+M: Johan Hedberg <johan.hedberg@gmail.com>
+M: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
+L: linux-bluetooth@vger.kernel.org
+S: Supported
+W: http://www.bluez.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
+F: drivers/bluetooth/
+
+BLUETOOTH SUBSYSTEM
+M: Marcel Holtmann <marcel@holtmann.org>
+M: Johan Hedberg <johan.hedberg@gmail.com>
+M: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
+L: linux-bluetooth@vger.kernel.org
+S: Supported
+W: http://www.bluez.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
+F: include/net/bluetooth/
+F: net/bluetooth/
+
+BONDING DRIVER
+M: Jay Vosburgh <j.vosburgh@gmail.com>
+M: Veaceslav Falico <vfalico@gmail.com>
+M: Andy Gospodarek <andy@greyhouse.net>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://sourceforge.net/projects/bonding/
+F: drivers/net/bonding/
+F: include/net/bonding.h
+F: include/uapi/linux/if_bonding.h
+
+BOSCH SENSORTEC BMA400 ACCELEROMETER IIO DRIVER
+M: Dan Robertson <dan@dlrobertson.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml
+F: drivers/iio/accel/bma400*
+
+BPF (Safe dynamic programs and tools)
+M: Alexei Starovoitov <ast@kernel.org>
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: Andrii Nakryiko <andrii@kernel.org>
+R: Martin KaFai Lau <kafai@fb.com>
+R: Song Liu <songliubraving@fb.com>
+R: Yonghong Song <yhs@fb.com>
+R: John Fastabend <john.fastabend@gmail.com>
+R: KP Singh <kpsingh@kernel.org>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Supported
+W: https://bpf.io/
+Q: https://patchwork.kernel.org/project/netdevbpf/list/?delegate=121173
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
+F: Documentation/bpf/
+F: Documentation/networking/filter.rst
+F: Documentation/userspace-api/ebpf/
+F: arch/*/net/*
+F: include/linux/bpf*
+F: include/linux/btf*
+F: include/linux/filter.h
+F: include/trace/events/xdp.h
+F: include/uapi/linux/bpf*
+F: include/uapi/linux/btf*
+F: include/uapi/linux/filter.h
+F: kernel/bpf/
+F: kernel/trace/bpf_trace.c
+F: lib/test_bpf.c
+F: net/bpf/
+F: net/core/filter.c
+F: net/sched/act_bpf.c
+F: net/sched/cls_bpf.c
+F: samples/bpf/
+F: scripts/bpf_doc.py
+F: tools/bpf/
+F: tools/lib/bpf/
+F: tools/testing/selftests/bpf/
+N: bpf
+K: bpf
+
+BPF JIT for ARM
+M: Shubham Bansal <illusionist.neo@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/arm/net/
+
+BPF JIT for ARM64
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: Alexei Starovoitov <ast@kernel.org>
+M: Zi Shen Lim <zlim.lnx@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Supported
+F: arch/arm64/net/
+
+BPF JIT for MIPS (32-BIT AND 64-BIT)
+M: Paul Burton <paulburton@kernel.org>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/mips/net/
+
+BPF JIT for NFP NICs
+M: Jakub Kicinski <kuba@kernel.org>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/netronome/nfp/bpf/
+
+BPF JIT for POWERPC (32-BIT AND 64-BIT)
+M: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/powerpc/net/
+
+BPF JIT for RISC-V (32-bit)
+M: Luke Nelson <luke.r.nels@gmail.com>
+M: Xi Wang <xi.wang@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/riscv/net/
+X: arch/riscv/net/bpf_jit_comp64.c
+
+BPF JIT for RISC-V (64-bit)
+M: Björn Töpel <bjorn@kernel.org>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/riscv/net/
+X: arch/riscv/net/bpf_jit_comp32.c
+
+BPF JIT for S390
+M: Ilya Leoshkevich <iii@linux.ibm.com>
+M: Heiko Carstens <hca@linux.ibm.com>
+M: Vasily Gorbik <gor@linux.ibm.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/s390/net/
+X: arch/s390/net/pnet.c
+
+BPF JIT for SPARC (32-BIT AND 64-BIT)
+M: David S. Miller <davem@davemloft.net>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/sparc/net/
+
+BPF JIT for X86 32-BIT
+M: Wang YanQing <udknight@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: arch/x86/net/bpf_jit_comp32.c
+
+BPF JIT for X86 64-BIT
+M: Alexei Starovoitov <ast@kernel.org>
+M: Daniel Borkmann <daniel@iogearbox.net>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Supported
+F: arch/x86/net/
+X: arch/x86/net/bpf_jit_comp32.c
+
+BPF LSM (Security Audit and Enforcement using BPF)
+M: KP Singh <kpsingh@kernel.org>
+R: Florent Revest <revest@chromium.org>
+R: Brendan Jackman <jackmanb@chromium.org>
+L: bpf@vger.kernel.org
+S: Maintained
+F: Documentation/bpf/bpf_lsm.rst
+F: include/linux/bpf_lsm.h
+F: kernel/bpf/bpf_lsm.c
+F: security/bpf/
+
+BROADCOM B44 10/100 ETHERNET DRIVER
+M: Michael Chan <michael.chan@broadcom.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/b44.*
+
+BROADCOM B53 ETHERNET SWITCH DRIVER
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: netdev@vger.kernel.org
+L: openwrt-devel@lists.openwrt.org (subscribers-only)
+S: Supported
+F: Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
+F: drivers/net/dsa/b53/*
+F: include/linux/dsa/brcm.h
+F: include/linux/platform_data/b53.h
+
+BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE
+M: Nicolas Saenz Julienne <nsaenz@kernel.org>
+L: bcm-kernel-feedback-list@broadcom.com
+L: linux-rpi-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nsaenz/linux-rpi.git
+F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F: drivers/pci/controller/pcie-brcmstb.c
+F: drivers/staging/vc04_services
+N: bcm2711
+N: bcm283*
+
+BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITECTURE
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: Ray Jui <rjui@broadcom.com>
+M: Scott Branden <sbranden@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+T: git git://github.com/broadcom/mach-bcm
+F: arch/arm/mach-bcm/
+N: bcm281*
+N: bcm113*
+N: bcm216*
+N: kona
+
+BROADCOM BCM47XX MIPS ARCHITECTURE
+M: Hauke Mehrtens <hauke@hauke-m.de>
+M: Rafał Miłecki <zajec5@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/mips/brcm/
+F: arch/mips/bcm47xx/*
+F: arch/mips/include/asm/mach-bcm47xx/*
+
+BROADCOM BCM4908 ETHERNET DRIVER
+M: Rafał Miłecki <rafal@milecki.pl>
+M: bcm-kernel-feedback-list@broadcom.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml
+F: drivers/net/ethernet/broadcom/bcm4908_enet.*
+F: drivers/net/ethernet/broadcom/unimac.h
+
+BROADCOM BCM5301X ARM ARCHITECTURE
+M: Hauke Mehrtens <hauke@hauke-m.de>
+M: Rafał Miłecki <zajec5@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/bcm470*
+F: arch/arm/boot/dts/bcm5301*
+F: arch/arm/boot/dts/bcm953012*
+F: arch/arm/mach-bcm/bcm_5301x.c
+
+BROADCOM BCM53573 ARM ARCHITECTURE
+M: Rafał Miłecki <rafal@milecki.pl>
+L: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/boot/dts/bcm47189*
+F: arch/arm/boot/dts/bcm53573*
+
+BROADCOM BCM63XX ARM ARCHITECTURE
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/broadcom/stblinux.git
+N: bcm63xx
+
+BROADCOM BCM63XX/BCM33XX UDC DRIVER
+M: Kevin Cernekee <cernekee@gmail.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/gadget/udc/bcm63xx_udc.*
+
+BROADCOM BCM7XXX ARM ARCHITECTURE
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/broadcom/stblinux.git
+F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F: arch/arm/boot/dts/bcm7*.dts*
+F: arch/arm/include/asm/hardware/cache-b15-rac.h
+F: arch/arm/mach-bcm/*brcmstb*
+F: arch/arm/mm/cache-b15-rac.c
+F: drivers/bus/brcmstb_gisb.c
+F: drivers/pci/controller/pcie-brcmstb.c
+N: brcmstb
+
+BROADCOM BDC DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-usb@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: Documentation/devicetree/bindings/usb/brcm,bdc.txt
+F: drivers/usb/gadget/udc/bdc/
+
+BROADCOM BMIPS CPUFREQ DRIVER
+M: Markus Mayer <mmayer@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: drivers/cpufreq/bmips-cpufreq.c
+
+BROADCOM BMIPS MIPS ARCHITECTURE
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: bcm-kernel-feedback-list@broadcom.com
+L: linux-mips@vger.kernel.org
+S: Maintained
+T: git git://github.com/broadcom/stblinux.git
+F: arch/mips/bmips/*
+F: arch/mips/boot/dts/brcm/bcm*.dts*
+F: arch/mips/include/asm/mach-bmips/*
+F: arch/mips/kernel/*bmips*
+F: drivers/soc/bcm/bcm63xx
+F: drivers/irqchip/irq-bcm63*
+F: drivers/irqchip/irq-bcm7*
+F: drivers/irqchip/irq-brcmstb*
+F: include/linux/bcm963xx_nvram.h
+F: include/linux/bcm963xx_tag.h
+
+BROADCOM BNX2 GIGABIT ETHERNET DRIVER
+M: Rasesh Mody <rmody@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/bnx2.*
+F: drivers/net/ethernet/broadcom/bnx2_*
+
+BROADCOM BNX2FC 10 GIGABIT FCOE DRIVER
+M: Saurav Kashyap <skashyap@marvell.com>
+M: Javed Hasan <jhasan@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/bnx2fc/
+
+BROADCOM BNX2I 1/10 GIGABIT iSCSI DRIVER
+M: Nilesh Javali <njavali@marvell.com>
+M: Manish Rangankar <mrangankar@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/bnx2i/
+
+BROADCOM BNX2X 10 GIGABIT ETHERNET DRIVER
+M: Ariel Elior <aelior@marvell.com>
+M: Sudarsana Kalluru <skalluru@marvell.com>
+M: GR-everest-linux-l2@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/bnx2x/
+
+BROADCOM BNXT_EN 50 GIGABIT ETHERNET DRIVER
+M: Michael Chan <michael.chan@broadcom.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/bnxt/
+
+BROADCOM BRCM80211 IEEE802.11n WIRELESS DRIVER
+M: Arend van Spriel <aspriel@gmail.com>
+M: Franky Lin <franky.lin@broadcom.com>
+M: Hante Meuleman <hante.meuleman@broadcom.com>
+M: Chi-hsien Lin <chi-hsien.lin@infineon.com>
+M: Wright Feng <wright.feng@infineon.com>
+M: Chung-hsien Hsu <chung-hsien.hsu@infineon.com>
+L: linux-wireless@vger.kernel.org
+L: brcm80211-dev-list.pdl@broadcom.com
+L: SHA-cyfmac-dev-list@infineon.com
+S: Supported
+F: drivers/net/wireless/broadcom/brcm80211/
+
+BROADCOM BRCMSTB GPIO DRIVER
+M: Gregory Fong <gregory.0xf0@gmail.com>
+L: bcm-kernel-feedback-list@broadcom.com
+S: Supported
+F: Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
+F: drivers/gpio/gpio-brcmstb.c
+
+BROADCOM BRCMSTB I2C DRIVER
+M: Kamal Dasu <kdasu.kdev@gmail.com>
+L: linux-i2c@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Supported
+F: Documentation/devicetree/bindings/i2c/brcm,brcmstb-i2c.yaml
+F: drivers/i2c/busses/i2c-brcmstb.c
+
+BROADCOM BRCMSTB UART DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-serial@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml
+F: drivers/tty/serial/8250/8250_bcm7271.c
+
+BROADCOM BRCMSTB USB EHCI DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-usb@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.yaml
+F: drivers/usb/host/ehci-brcm.*
+
+BROADCOM BRCMSTB USB PIN MAP DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-usb@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: Documentation/devicetree/bindings/usb/brcm,usb-pinmap.yaml
+F: drivers/usb/misc/brcmstb-usb-pinmap.c
+
+BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-kernel@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: drivers/phy/broadcom/phy-brcm-usb*
+
+BROADCOM ETHERNET PHY DRIVERS
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: bcm-kernel-feedback-list@broadcom.com
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/net/broadcom-bcm87xx.txt
+F: drivers/net/phy/bcm*.[ch]
+F: drivers/net/phy/broadcom.c
+F: include/linux/brcmphy.h
+
+BROADCOM GENET ETHERNET DRIVER
+M: Doug Berger <opendmb@gmail.com>
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: bcm-kernel-feedback-list@broadcom.com
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/net/brcm,bcmgenet.txt
+F: Documentation/devicetree/bindings/net/brcm,unimac-mdio.txt
+F: drivers/net/ethernet/broadcom/genet/
+F: drivers/net/ethernet/broadcom/unimac.h
+F: drivers/net/mdio/mdio-bcm-unimac.c
+F: include/linux/platform_data/bcmgenet.h
+F: include/linux/platform_data/mdio-bcm-unimac.h
+
+BROADCOM IPROC ARM ARCHITECTURE
+M: Ray Jui <rjui@broadcom.com>
+M: Scott Branden <sbranden@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/broadcom/cygnus-linux.git
+F: arch/arm64/boot/dts/broadcom/northstar2/*
+F: arch/arm64/boot/dts/broadcom/stingray/*
+F: drivers/clk/bcm/clk-ns*
+F: drivers/clk/bcm/clk-sr*
+F: drivers/pinctrl/bcm/pinctrl-ns*
+F: include/dt-bindings/clock/bcm-sr*
+N: iproc
+N: cygnus
+N: bcm[-_]nsp
+N: bcm9113*
+N: bcm9583*
+N: bcm9585*
+N: bcm9586*
+N: bcm988312
+N: bcm113*
+N: bcm583*
+N: bcm585*
+N: bcm586*
+N: bcm88312
+N: hr2
+N: stingray
+
+BROADCOM IPROC GBIT ETHERNET DRIVER
+M: Rafał Miłecki <rafal@milecki.pl>
+M: bcm-kernel-feedback-list@broadcom.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/brcm,amac.txt
+F: drivers/net/ethernet/broadcom/bgmac*
+F: drivers/net/ethernet/broadcom/unimac.h
+
+BROADCOM KONA GPIO DRIVER
+M: Ray Jui <rjui@broadcom.com>
+L: bcm-kernel-feedback-list@broadcom.com
+S: Supported
+F: Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt
+F: drivers/gpio/gpio-bcm-kona.c
+
+BROADCOM MPI3 STORAGE CONTROLLER DRIVER
+M: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
+M: Kashyap Desai <kashyap.desai@broadcom.com>
+M: Sumit Saxena <sumit.saxena@broadcom.com>
+M: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
+L: mpi3mr-linuxdrv.pdl@broadcom.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: https://www.broadcom.com/support/storage
+F: drivers/scsi/mpi3mr/
+
+BROADCOM NETXTREME-E ROCE DRIVER
+M: Selvin Xavier <selvin.xavier@broadcom.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.broadcom.com
+F: drivers/infiniband/hw/bnxt_re/
+F: include/uapi/rdma/bnxt_re-abi.h
+
+BROADCOM NVRAM DRIVER
+M: Rafał Miłecki <zajec5@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: drivers/firmware/broadcom/*
+
+BROADCOM PMB (POWER MANAGEMENT BUS) DRIVER
+M: Rafał Miłecki <rafal@milecki.pl>
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://github.com/broadcom/stblinux.git
+F: drivers/soc/bcm/bcm63xx/bcm-pmb.c
+F: include/dt-bindings/soc/bcm-pmb.h
+
+BROADCOM SPECIFIC AMBA DRIVER (BCMA)
+M: Rafał Miłecki <zajec5@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/bcma/
+F: include/linux/bcma/
+
+BROADCOM SPI DRIVER
+M: Kamal Dasu <kdasu.kdev@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.yaml
+F: drivers/spi/spi-bcm-qspi.*
+F: drivers/spi/spi-brcmstb-qspi.c
+F: drivers/spi/spi-iproc-qspi.c
+
+BROADCOM STB AVS CPUFREQ DRIVER
+M: Markus Mayer <mmayer@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt
+F: drivers/cpufreq/brcmstb*
+
+BROADCOM STB AVS TMON DRIVER
+M: Markus Mayer <mmayer@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt
+F: drivers/thermal/broadcom/brcmstb*
+
+BROADCOM STB DPFE DRIVER
+M: Markus Mayer <mmayer@broadcom.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.yaml
+F: drivers/memory/brcmstb_dpfe.c
+
+BROADCOM STB NAND FLASH DRIVER
+M: Brian Norris <computersforpeace@gmail.com>
+M: Kamal Dasu <kdasu.kdev@gmail.com>
+L: linux-mtd@lists.infradead.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: drivers/mtd/nand/raw/brcmnand/
+
+BROADCOM STB PCIE DRIVER
+M: Jim Quinlan <jim2101024@gmail.com>
+M: Nicolas Saenz Julienne <nsaenz@kernel.org>
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: bcm-kernel-feedback-list@broadcom.com
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+F: drivers/pci/controller/pcie-brcmstb.c
+
+BROADCOM SYSTEMPORT ETHERNET DRIVER
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: bcm-kernel-feedback-list@broadcom.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/bcmsysport.*
+F: drivers/net/ethernet/broadcom/unimac.h
+
+BROADCOM TG3 GIGABIT ETHERNET DRIVER
+M: Siva Reddy Kallam <siva.kallam@broadcom.com>
+M: Prashant Sreedharan <prashant@broadcom.com>
+M: Michael Chan <mchan@broadcom.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/broadcom/tg3.*
+
+BROADCOM VK DRIVER
+M: Scott Branden <scott.branden@broadcom.com>
+L: bcm-kernel-feedback-list@broadcom.com
+S: Supported
+F: drivers/misc/bcm-vk/
+F: include/uapi/linux/misc/bcm_vk.h
+
+BROCADE BFA FC SCSI DRIVER
+M: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
+M: Sudarsana Kalluru <sudarsana.kalluru@qlogic.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/bfa/
+
+BROCADE BNA 10 GIGABIT ETHERNET DRIVER
+M: Rasesh Mody <rmody@marvell.com>
+M: Sudarsana Kalluru <skalluru@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/brocade/bna/
+
+BSG (block layer generic sg v4 driver)
+M: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: block/bsg.c
+F: include/linux/bsg.h
+F: include/uapi/linux/bsg.h
+
+BT87X AUDIO DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: Documentation/sound/cards/bt87x.rst
+F: sound/pci/bt87x.c
+
+BT8XXGPIO DRIVER
+M: Michael Buesch <m@bues.ch>
+S: Maintained
+W: http://bu3sch.de/btgpio.php
+F: drivers/gpio/gpio-bt8xx.c
+
+BTRFS FILE SYSTEM
+M: Chris Mason <clm@fb.com>
+M: Josef Bacik <josef@toxicpanda.com>
+M: David Sterba <dsterba@suse.com>
+L: linux-btrfs@vger.kernel.org
+S: Maintained
+W: http://btrfs.wiki.kernel.org/
+Q: http://patchwork.kernel.org/project/linux-btrfs/list/
+C: irc://irc.libera.chat/btrfs
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git
+F: Documentation/filesystems/btrfs.rst
+F: fs/btrfs/
+F: include/linux/btrfs*
+F: include/uapi/linux/btrfs*
+
+BTTV VIDEO4LINUX DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/driver-api/media/drivers/bttv*
+F: drivers/media/pci/bt8xx/bttv*
+
+BUS FREQUENCY DRIVER FOR SAMSUNG EXYNOS
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-pm@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
+F: Documentation/devicetree/bindings/devfreq/exynos-bus.txt
+F: drivers/devfreq/exynos-bus.c
+
+BUSLOGIC SCSI DRIVER
+M: Khalid Aziz <khalid@gonehiking.org>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/BusLogic.*
+F: drivers/scsi/FlashPoint.*
+
+C-MEDIA CMI8788 DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: sound/pci/oxygen/
+
+C-SKY ARCHITECTURE
+M: Guo Ren <guoren@kernel.org>
+L: linux-csky@vger.kernel.org
+S: Supported
+T: git https://github.com/c-sky/csky-linux.git
+F: Documentation/devicetree/bindings/csky/
+F: Documentation/devicetree/bindings/interrupt-controller/csky,*
+F: Documentation/devicetree/bindings/timer/csky,*
+F: arch/csky/
+F: drivers/clocksource/timer-gx6605s.c
+F: drivers/clocksource/timer-mp-csky.c
+F: drivers/irqchip/irq-csky-*
+N: csky
+K: csky
+
+CA8210 IEEE-802.15.4 RADIO DRIVER
+M: Harry Morris <h.morris@cascoda.com>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+W: https://github.com/Cascoda/ca8210-linux.git
+F: Documentation/devicetree/bindings/net/ieee802154/ca8210.txt
+F: drivers/net/ieee802154/ca8210.c
+
+CANAAN/KENDRYTE K210 SOC FPIOA DRIVER
+M: Damien Le Moal <damien.lemoal@wdc.com>
+L: linux-riscv@lists.infradead.org
+L: linux-gpio@vger.kernel.org (pinctrl driver)
+F: Documentation/devicetree/bindings/pinctrl/canaan,k210-fpioa.yaml
+F: drivers/pinctrl/pinctrl-k210.c
+
+CANAAN/KENDRYTE K210 SOC RESET CONTROLLER DRIVER
+M: Damien Le Moal <damien.lemoal@wdc.com>
+L: linux-kernel@vger.kernel.org
+L: linux-riscv@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/reset/canaan,k210-rst.yaml
+F: drivers/reset/reset-k210.c
+
+CANAAN/KENDRYTE K210 SOC SYSTEM CONTROLLER DRIVER
+M: Damien Le Moal <damien.lemoal@wdc.com>
+L: linux-riscv@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/canaan,k210-sysctl.yaml
+F: drivers/soc/canaan/
+F: include/soc/canaan/
+
+CACHEFILES: FS-CACHE BACKEND FOR CACHING ON MOUNTED FILESYSTEMS
+M: David Howells <dhowells@redhat.com>
+L: linux-cachefs@redhat.com (moderated for non-subscribers)
+S: Supported
+F: Documentation/filesystems/caching/cachefiles.rst
+F: fs/cachefiles/
+
+CADENCE MIPI-CSI2 BRIDGES
+M: Maxime Ripard <mripard@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/cdns,*.txt
+F: drivers/media/platform/cadence/cdns-csi2*
+
+CADENCE NAND DRIVER
+L: linux-mtd@lists.infradead.org
+S: Orphan
+F: Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
+F: drivers/mtd/nand/raw/cadence-nand-controller.c
+
+CADENCE USB3 DRD IP DRIVER
+M: Peter Chen <peter.chen@kernel.org>
+M: Pawel Laszczak <pawell@cadence.com>
+R: Roger Quadros <rogerq@kernel.org>
+R: Aswath Govindraju <a-govindraju@ti.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F: Documentation/devicetree/bindings/usb/cdns,usb3.yaml
+F: drivers/usb/cdns3/
+X: drivers/usb/cdns3/cdnsp*
+
+CADENCE USBSSP DRD IP DRIVER
+M: Pawel Laszczak <pawell@cadence.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F: drivers/usb/cdns3/
+X: drivers/usb/cdns3/cdns3*
+
+CADET FM/AM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-cadet*
+
+CAFE CMOS INTEGRATED CAMERA CONTROLLER DRIVER
+L: linux-media@vger.kernel.org
+S: Orphan
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/cafe_ccic*
+F: drivers/media/platform/marvell-ccic/
+
+CAIF NETWORK LAYER
+L: netdev@vger.kernel.org
+S: Orphan
+F: Documentation/networking/caif/
+F: drivers/net/caif/
+F: include/net/caif/
+F: include/uapi/linux/caif/
+F: net/caif/
+
+CAKE QDISC
+M: Toke Høiland-Jørgensen <toke@toke.dk>
+L: cake@lists.bufferbloat.net (moderated for non-subscribers)
+S: Maintained
+F: net/sched/sch_cake.c
+
+CAN NETWORK DRIVERS
+M: Wolfgang Grandegger <wg@grandegger.com>
+M: Marc Kleine-Budde <mkl@pengutronix.de>
+L: linux-can@vger.kernel.org
+S: Maintained
+W: https://github.com/linux-can
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
+F: Documentation/devicetree/bindings/net/can/
+F: Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml
+F: drivers/net/can/
+F: drivers/phy/phy-can-transceiver.c
+F: include/linux/can/bittiming.h
+F: include/linux/can/dev.h
+F: include/linux/can/led.h
+F: include/linux/can/length.h
+F: include/linux/can/platform/
+F: include/linux/can/rx-offload.h
+F: include/uapi/linux/can/error.h
+F: include/uapi/linux/can/netlink.h
+F: include/uapi/linux/can/vxcan.h
+
+CAN NETWORK LAYER
+M: Oliver Hartkopp <socketcan@hartkopp.net>
+M: Marc Kleine-Budde <mkl@pengutronix.de>
+L: linux-can@vger.kernel.org
+S: Maintained
+W: https://github.com/linux-can
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
+F: Documentation/networking/can.rst
+F: include/linux/can/can-ml.h
+F: include/linux/can/core.h
+F: include/linux/can/skb.h
+F: include/net/netns/can.h
+F: include/uapi/linux/can.h
+F: include/uapi/linux/can/bcm.h
+F: include/uapi/linux/can/gw.h
+F: include/uapi/linux/can/isotp.h
+F: include/uapi/linux/can/raw.h
+F: net/can/
+
+CAN-J1939 NETWORK LAYER
+M: Robin van der Gracht <robin@protonic.nl>
+M: Oleksij Rempel <o.rempel@pengutronix.de>
+R: kernel@pengutronix.de
+L: linux-can@vger.kernel.org
+S: Maintained
+F: Documentation/networking/j1939.rst
+F: include/uapi/linux/can/j1939.h
+F: net/can/j1939/
+
+CAPABILITIES
+M: Serge Hallyn <serge@hallyn.com>
+L: linux-security-module@vger.kernel.org
+S: Supported
+F: include/linux/capability.h
+F: include/uapi/linux/capability.h
+F: kernel/capability.c
+F: security/commoncap.c
+
+CAPELLA MICROSYSTEMS LIGHT SENSOR DRIVER
+M: Kevin Tsai <ktsai@capellamicro.com>
+S: Maintained
+F: drivers/iio/light/cm*
+
+CARL9170 LINUX COMMUNITY WIRELESS DRIVER
+M: Christian Lamparter <chunkeey@googlemail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/en/users/Drivers/carl9170
+F: drivers/net/wireless/ath/carl9170/
+
+CAVIUM I2C DRIVER
+M: Robert Richter <rric@kernel.org>
+S: Odd Fixes
+W: http://www.marvell.com
+F: drivers/i2c/busses/i2c-octeon*
+F: drivers/i2c/busses/i2c-thunderx*
+
+CAVIUM LIQUIDIO NETWORK DRIVER
+M: Derek Chickles <dchickles@marvell.com>
+M: Satanand Burla <sburla@marvell.com>
+M: Felix Manlunas <fmanlunas@marvell.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.marvell.com
+F: drivers/net/ethernet/cavium/liquidio/
+
+CAVIUM MMC DRIVER
+M: Robert Richter <rric@kernel.org>
+S: Odd Fixes
+W: http://www.marvell.com
+F: drivers/mmc/host/cavium*
+
+CAVIUM OCTEON-TX CRYPTO DRIVER
+M: George Cherian <gcherian@marvell.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+W: http://www.marvell.com
+F: drivers/crypto/cavium/cpt/
+
+CAVIUM THUNDERX2 ARM64 SOC
+M: Robert Richter <rric@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Odd Fixes
+F: Documentation/devicetree/bindings/arm/cavium-thunder2.txt
+F: arch/arm64/boot/dts/cavium/thunder2-99xx*
+
+CBS/ETF/TAPRIO QDISCS
+M: Vinicius Costa Gomes <vinicius.gomes@intel.com>
+S: Maintained
+L: netdev@vger.kernel.org
+F: net/sched/sch_cbs.c
+F: net/sched/sch_etf.c
+F: net/sched/sch_taprio.c
+
+CC2520 IEEE-802.15.4 RADIO DRIVER
+M: Varka Bhadram <varkabhadram@gmail.com>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
+F: drivers/net/ieee802154/cc2520.c
+F: include/linux/spi/cc2520.h
+
+CCREE ARM TRUSTZONE CRYPTOCELL REE DRIVER
+M: Gilad Ben-Yossef <gilad@benyossef.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+W: https://developer.arm.com/products/system-ip/trustzone-cryptocell/cryptocell-700-family
+F: drivers/crypto/ccree/
+
+CCTRNG ARM TRUSTZONE CRYPTOCELL TRUE RANDOM NUMBER GENERATOR (TRNG) DRIVER
+M: Hadar Gat <hadar.gat@arm.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+F: drivers/char/hw_random/cctrng.c
+F: drivers/char/hw_random/cctrng.h
+F: Documentation/devicetree/bindings/rng/arm-cctrng.yaml
+W: https://developer.arm.com/products/system-ip/trustzone-cryptocell/cryptocell-700-family
+
+CEC FRAMEWORK
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Supported
+W: http://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/ABI/testing/debugfs-cec-error-inj
+F: Documentation/devicetree/bindings/media/cec.txt
+F: Documentation/driver-api/media/cec-core.rst
+F: Documentation/userspace-api/media/cec
+F: drivers/media/cec/
+F: drivers/media/rc/keymaps/rc-cec.c
+F: include/media/cec-notifier.h
+F: include/media/cec.h
+F: include/uapi/linux/cec-funcs.h
+F: include/uapi/linux/cec.h
+
+CEC GPIO DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Supported
+W: http://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/cec-gpio.txt
+F: drivers/media/cec/platform/cec-gpio/
+
+CELL BROADBAND ENGINE ARCHITECTURE
+M: Arnd Bergmann <arnd@arndb.de>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+W: http://www.ibm.com/developerworks/power/cell/
+F: arch/powerpc/include/asm/cell*.h
+F: arch/powerpc/include/asm/spu*.h
+F: arch/powerpc/include/uapi/asm/spu*.h
+F: arch/powerpc/platforms/cell/
+
+CELLWISE CW2015 BATTERY DRIVER
+M: Tobias Schrammm <t.schramm@manjaro.org>
+S: Maintained
+F: Documentation/devicetree/bindings/power/supply/cw2015_battery.yaml
+F: drivers/power/supply/cw2015_battery.c
+
+CEPH COMMON CODE (LIBCEPH)
+M: Ilya Dryomov <idryomov@gmail.com>
+M: Jeff Layton <jlayton@kernel.org>
+L: ceph-devel@vger.kernel.org
+S: Supported
+W: http://ceph.com/
+T: git git://github.com/ceph/ceph-client.git
+F: include/linux/ceph/
+F: include/linux/crush/
+F: net/ceph/
+
+CEPH DISTRIBUTED FILE SYSTEM CLIENT (CEPH)
+M: Jeff Layton <jlayton@kernel.org>
+M: Ilya Dryomov <idryomov@gmail.com>
+L: ceph-devel@vger.kernel.org
+S: Supported
+W: http://ceph.com/
+T: git git://github.com/ceph/ceph-client.git
+F: Documentation/filesystems/ceph.rst
+F: fs/ceph/
+
+CERTIFICATE HANDLING
+M: David Howells <dhowells@redhat.com>
+M: David Woodhouse <dwmw2@infradead.org>
+L: keyrings@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/module-signing.rst
+F: certs/
+F: scripts/extract-cert.c
+F: scripts/sign-file.c
+
+CFAG12864B LCD DRIVER
+M: Miguel Ojeda <ojeda@kernel.org>
+S: Maintained
+F: drivers/auxdisplay/cfag12864b.c
+F: include/linux/cfag12864b.h
+
+CFAG12864BFB LCD FRAMEBUFFER DRIVER
+M: Miguel Ojeda <ojeda@kernel.org>
+S: Maintained
+F: drivers/auxdisplay/cfag12864bfb.c
+F: include/linux/cfag12864b.h
+
+CHAR and MISC DRIVERS
+M: Arnd Bergmann <arnd@arndb.de>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
+F: drivers/char/
+F: drivers/misc/
+F: include/linux/miscdevice.h
+X: drivers/char/agp/
+X: drivers/char/hw_random/
+X: drivers/char/ipmi/
+X: drivers/char/random.c
+X: drivers/char/tpm/
+
+CHECKPATCH
+M: Andy Whitcroft <apw@canonical.com>
+M: Joe Perches <joe@perches.com>
+R: Dwaipayan Ray <dwaipayanray1@gmail.com>
+R: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+S: Maintained
+F: scripts/checkpatch.pl
+
+CHECKPATCH DOCUMENTATION
+M: Dwaipayan Ray <dwaipayanray1@gmail.com>
+M: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+R: Joe Perches <joe@perches.com>
+S: Maintained
+F: Documentation/dev-tools/checkpatch.rst
+
+CHINESE DOCUMENTATION
+M: Alex Shi <alexs@kernel.org>
+S: Maintained
+F: Documentation/translations/zh_CN/
+
+CHIPIDEA USB HIGH SPEED DUAL ROLE CONTROLLER
+M: Peter Chen <peter.chen@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F: drivers/usb/chipidea/
+
+CHIPONE ICN8318 I2C TOUCHSCREEN DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/input/touchscreen/chipone_icn8318.txt
+F: drivers/input/touchscreen/chipone_icn8318.c
+
+CHIPONE ICN8505 I2C TOUCHSCREEN DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/chipone_icn8505.c
+
+CHROME HARDWARE PLATFORM SUPPORT
+M: Benson Leung <bleung@chromium.org>
+M: Enric Balletbo i Serra <enric.balletbo@collabora.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git
+F: drivers/platform/chrome/
+
+CHROMEOS EC CODEC DRIVER
+M: Cheng-Yi Chiang <cychiang@chromium.org>
+R: Enric Balletbo i Serra <enric.balletbo@collabora.com>
+R: Guenter Roeck <groeck@chromium.org>
+S: Maintained
+F: Documentation/devicetree/bindings/sound/google,cros-ec-codec.yaml
+F: sound/soc/codecs/cros_ec_codec.*
+
+CHROMEOS EC SUBDRIVERS
+M: Benson Leung <bleung@chromium.org>
+M: Enric Balletbo i Serra <enric.balletbo@collabora.com>
+R: Guenter Roeck <groeck@chromium.org>
+S: Maintained
+F: drivers/power/supply/cros_usbpd-charger.c
+N: cros_ec
+N: cros-ec
+
+CHRONTEL CH7322 CEC DRIVER
+M: Jeff Chase <jnchase@google.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/chrontel,ch7322.yaml
+F: drivers/media/cec/i2c/ch7322.c
+
+CIRRUS LOGIC AUDIO CODEC DRIVERS
+M: James Schulman <james.schulman@cirrus.com>
+M: David Rhodes <david.rhodes@cirrus.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+L: patches@opensource.cirrus.com
+S: Maintained
+F: sound/soc/codecs/cs*
+
+CIRRUS LOGIC EP93XX ETHERNET DRIVER
+M: Hartley Sweeten <hsweeten@visionengravers.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/cirrus/ep93xx_eth.c
+
+CIRRUS LOGIC LOCHNAGAR DRIVER
+M: Charles Keepax <ckeepax@opensource.cirrus.com>
+M: Richard Fitzgerald <rf@opensource.cirrus.com>
+L: patches@opensource.cirrus.com
+S: Supported
+F: Documentation/devicetree/bindings/clock/cirrus,lochnagar.yaml
+F: Documentation/devicetree/bindings/hwmon/cirrus,lochnagar.yaml
+F: Documentation/devicetree/bindings/mfd/cirrus,lochnagar.yaml
+F: Documentation/devicetree/bindings/pinctrl/cirrus,lochnagar.yaml
+F: Documentation/devicetree/bindings/sound/cirrus,lochnagar.yaml
+F: Documentation/hwmon/lochnagar.rst
+F: drivers/clk/clk-lochnagar.c
+F: drivers/hwmon/lochnagar-hwmon.c
+F: drivers/mfd/lochnagar-i2c.c
+F: drivers/pinctrl/cirrus/pinctrl-lochnagar.c
+F: drivers/regulator/lochnagar-regulator.c
+F: include/dt-bindings/clk/lochnagar.h
+F: include/dt-bindings/pinctrl/lochnagar.h
+F: include/linux/mfd/lochnagar*
+F: sound/soc/codecs/lochnagar-sc.c
+
+CIRRUS LOGIC MADERA CODEC DRIVERS
+M: Charles Keepax <ckeepax@opensource.cirrus.com>
+M: Richard Fitzgerald <rf@opensource.cirrus.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+L: patches@opensource.cirrus.com
+S: Supported
+W: https://github.com/CirrusLogic/linux-drivers/wiki
+T: git https://github.com/CirrusLogic/linux-drivers.git
+F: Documentation/devicetree/bindings/mfd/cirrus,madera.yaml
+F: Documentation/devicetree/bindings/pinctrl/cirrus,madera.yaml
+F: Documentation/devicetree/bindings/sound/cirrus,madera.yaml
+F: drivers/gpio/gpio-madera*
+F: drivers/irqchip/irq-madera*
+F: drivers/mfd/cs47l*
+F: drivers/mfd/madera*
+F: drivers/pinctrl/cirrus/*
+F: include/dt-bindings/sound/madera*
+F: include/linux/irqchip/irq-madera*
+F: include/linux/mfd/madera/*
+F: include/sound/madera*
+F: sound/soc/codecs/cs47l*
+F: sound/soc/codecs/madera*
+
+CISCO FCOE HBA DRIVER
+M: Satish Kharat <satishkh@cisco.com>
+M: Sesidhar Baddela <sebaddel@cisco.com>
+M: Karan Tilak Kumar <kartilak@cisco.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/fnic/
+
+CISCO SCSI HBA DRIVER
+M: Karan Tilak Kumar <kartilak@cisco.com>
+M: Sesidhar Baddela <sebaddel@cisco.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/snic/
+
+CISCO VIC ETHERNET NIC DRIVER
+M: Christian Benvenuti <benve@cisco.com>
+M: Govindarajulu Varadarajan <_govind@gmx.com>
+S: Supported
+F: drivers/net/ethernet/cisco/enic/
+
+CISCO VIC LOW LATENCY NIC DRIVER
+M: Christian Benvenuti <benve@cisco.com>
+M: Nelson Escobar <neescoba@cisco.com>
+S: Supported
+F: drivers/infiniband/hw/usnic/
+
+CLANG-FORMAT FILE
+M: Miguel Ojeda <ojeda@kernel.org>
+S: Maintained
+F: .clang-format
+
+CLANG/LLVM BUILD SUPPORT
+M: Nathan Chancellor <nathan@kernel.org>
+M: Nick Desaulniers <ndesaulniers@google.com>
+L: llvm@lists.linux.dev
+S: Supported
+W: https://clangbuiltlinux.github.io/
+B: https://github.com/ClangBuiltLinux/linux/issues
+C: irc://irc.libera.chat/clangbuiltlinux
+F: Documentation/kbuild/llvm.rst
+F: include/linux/compiler-clang.h
+F: scripts/Makefile.clang
+F: scripts/clang-tools/
+K: \b(?i:clang|llvm)\b
+
+CLANG CONTROL FLOW INTEGRITY SUPPORT
+M: Sami Tolvanen <samitolvanen@google.com>
+M: Kees Cook <keescook@chromium.org>
+R: Nathan Chancellor <nathan@kernel.org>
+R: Nick Desaulniers <ndesaulniers@google.com>
+L: llvm@lists.linux.dev
+S: Supported
+B: https://github.com/ClangBuiltLinux/linux/issues
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/clang/features
+F: include/linux/cfi.h
+F: kernel/cfi.c
+
+CLEANCACHE API
+M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: include/linux/cleancache.h
+F: mm/cleancache.c
+
+CLK API
+M: Russell King <linux@armlinux.org.uk>
+L: linux-clk@vger.kernel.org
+S: Maintained
+F: include/linux/clk.h
+
+CLOCKSOURCE, CLOCKEVENT DRIVERS
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+M: Thomas Gleixner <tglx@linutronix.de>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
+F: Documentation/devicetree/bindings/timer/
+F: drivers/clocksource/
+
+CMPC ACPI DRIVER
+M: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
+M: Daniel Oliveira Nascimento <don@syst.com.br>
+L: platform-driver-x86@vger.kernel.org
+S: Supported
+F: drivers/platform/x86/classmate-laptop.c
+
+COBALT MEDIA DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/cobalt/
+
+COCCINELLE/Semantic Patches (SmPL)
+M: Julia Lawall <Julia.Lawall@inria.fr>
+M: Gilles Muller <Gilles.Muller@inria.fr>
+M: Nicolas Palix <nicolas.palix@imag.fr>
+M: Michal Marek <michal.lkml@markovi.net>
+L: cocci@systeme.lip6.fr (moderated for non-subscribers)
+S: Supported
+W: http://coccinelle.lip6.fr/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild.git misc
+F: Documentation/dev-tools/coccinelle.rst
+F: scripts/coccicheck
+F: scripts/coccinelle/
+
+CODA FILE SYSTEM
+M: Jan Harkes <jaharkes@cs.cmu.edu>
+M: coda@cs.cmu.edu
+L: codalist@coda.cs.cmu.edu
+S: Maintained
+W: http://www.coda.cs.cmu.edu/
+F: Documentation/filesystems/coda.rst
+F: fs/coda/
+F: include/linux/coda*.h
+F: include/uapi/linux/coda*.h
+
+CODA V4L2 MEM2MEM DRIVER
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/coda.yaml
+F: drivers/media/platform/coda/
+
+CODE OF CONDUCT
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S: Supported
+F: Documentation/process/code-of-conduct-interpretation.rst
+F: Documentation/process/code-of-conduct.rst
+
+COMEDI DRIVERS
+M: Ian Abbott <abbotti@mev.co.uk>
+M: H Hartley Sweeten <hsweeten@visionengravers.com>
+S: Odd Fixes
+F: drivers/comedi/
+
+COMMON CLK FRAMEWORK
+M: Michael Turquette <mturquette@baylibre.com>
+M: Stephen Boyd <sboyd@kernel.org>
+L: linux-clk@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-clk/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
+F: Documentation/devicetree/bindings/clock/
+F: drivers/clk/
+F: include/linux/clk-pr*
+F: include/linux/clk/
+F: include/linux/of_clk.h
+X: drivers/clk/clkdev.c
+
+COMMON INTERNET FILE SYSTEM CLIENT (CIFS)
+M: Steve French <sfrench@samba.org>
+L: linux-cifs@vger.kernel.org
+L: samba-technical@lists.samba.org (moderated for non-subscribers)
+S: Supported
+W: http://linux-cifs.samba.org/
+T: git git://git.samba.org/sfrench/cifs-2.6.git
+F: Documentation/admin-guide/cifs/
+F: fs/cifs/
+F: fs/smbfs_common/
+
+COMPACTPCI HOTPLUG CORE
+M: Scott Murray <scott@spiteful.org>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: drivers/pci/hotplug/cpci_hotplug*
+
+COMPACTPCI HOTPLUG GENERIC DRIVER
+M: Scott Murray <scott@spiteful.org>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: drivers/pci/hotplug/cpcihp_generic.c
+
+COMPACTPCI HOTPLUG ZIATECH ZT5550 DRIVER
+M: Scott Murray <scott@spiteful.org>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: drivers/pci/hotplug/cpcihp_zt5550.*
+
+COMPAL LAPTOP SUPPORT
+M: Cezary Jackiewicz <cezary.jackiewicz@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/compal-laptop.c
+
+COMPILER ATTRIBUTES
+M: Miguel Ojeda <ojeda@kernel.org>
+R: Nick Desaulniers <ndesaulniers@google.com>
+S: Maintained
+F: include/linux/compiler_attributes.h
+
+COMPUTE EXPRESS LINK (CXL)
+M: Alison Schofield <alison.schofield@intel.com>
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Ira Weiny <ira.weiny@intel.com>
+M: Ben Widawsky <ben.widawsky@intel.com>
+M: Dan Williams <dan.j.williams@intel.com>
+L: linux-cxl@vger.kernel.org
+S: Maintained
+F: drivers/cxl/
+F: include/uapi/linux/cxl_mem.h
+
+CONEXANT ACCESSRUNNER USB DRIVER
+L: accessrunner-general@lists.sourceforge.net
+S: Orphan
+W: http://accessrunner.sourceforge.net/
+F: drivers/usb/atm/cxacru.c
+
+CONFIGFS
+M: Joel Becker <jlbec@evilplan.org>
+M: Christoph Hellwig <hch@lst.de>
+S: Supported
+T: git git://git.infradead.org/users/hch/configfs.git
+F: fs/configfs/
+F: include/linux/configfs.h
+F: samples/configfs/
+
+CONSOLE SUBSYSTEM
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S: Supported
+F: drivers/video/console/
+F: include/linux/console*
+
+CONTEXT TRACKING
+M: Frederic Weisbecker <frederic@kernel.org>
+S: Maintained
+F: kernel/context_tracking.c
+F: include/linux/context_tracking*
+
+CONTROL GROUP (CGROUP)
+M: Tejun Heo <tj@kernel.org>
+M: Zefan Li <lizefan.x@bytedance.com>
+M: Johannes Weiner <hannes@cmpxchg.org>
+L: cgroups@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git
+F: Documentation/admin-guide/cgroup-v1/
+F: Documentation/admin-guide/cgroup-v2.rst
+F: include/linux/cgroup*
+F: kernel/cgroup/
+
+CONTROL GROUP - BLOCK IO CONTROLLER (BLKIO)
+M: Tejun Heo <tj@kernel.org>
+M: Jens Axboe <axboe@kernel.dk>
+L: cgroups@vger.kernel.org
+L: linux-block@vger.kernel.org
+T: git git://git.kernel.dk/linux-block
+F: Documentation/admin-guide/cgroup-v1/blkio-controller.rst
+F: block/bfq-cgroup.c
+F: block/blk-cgroup.c
+F: block/blk-iolatency.c
+F: block/blk-throttle.c
+F: include/linux/blk-cgroup.h
+
+CONTROL GROUP - CPUSET
+M: Zefan Li <lizefan.x@bytedance.com>
+L: cgroups@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git
+F: Documentation/admin-guide/cgroup-v1/cpusets.rst
+F: include/linux/cpuset.h
+F: kernel/cgroup/cpuset.c
+
+CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)
+M: Johannes Weiner <hannes@cmpxchg.org>
+M: Michal Hocko <mhocko@kernel.org>
+M: Vladimir Davydov <vdavydov.dev@gmail.com>
+L: cgroups@vger.kernel.org
+L: linux-mm@kvack.org
+S: Maintained
+F: mm/memcontrol.c
+F: mm/swap_cgroup.c
+
+CORETEMP HARDWARE MONITORING DRIVER
+M: Fenghua Yu <fenghua.yu@intel.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/coretemp.rst
+F: drivers/hwmon/coretemp.c
+
+CORSAIR-CPRO HARDWARE MONITOR DRIVER
+M: Marius Zachmann <mail@mariuszachmann.de>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/corsair-cpro.c
+
+CORSAIR-PSU HARDWARE MONITOR DRIVER
+M: Wilken Gottwalt <wilken.gottwalt@posteo.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/corsair-psu.rst
+F: drivers/hwmon/corsair-psu.c
+
+COSA/SRP SYNC SERIAL DRIVER
+M: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
+S: Maintained
+W: http://www.fi.muni.cz/~kas/cosa/
+F: drivers/net/wan/cosa*
+
+COUNTER SUBSYSTEM
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-counter
+F: Documentation/driver-api/generic-counter.rst
+F: drivers/counter/
+F: include/linux/counter.h
+F: include/linux/counter_enum.h
+
+CP2615 I2C DRIVER
+M: Bence Csókás <bence98@sch.bme.hu>
+S: Maintained
+F: drivers/i2c/busses/i2c-cp2615.c
+
+CPMAC ETHERNET DRIVER
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/ti/cpmac.c
+
+CPU FREQUENCY DRIVERS - VEXPRESS SPC ARM BIG LITTLE
+M: Viresh Kumar <viresh.kumar@linaro.org>
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
+F: drivers/cpufreq/vexpress-spc-cpufreq.c
+
+CPU FREQUENCY SCALING FRAMEWORK
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Viresh Kumar <viresh.kumar@linaro.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git (For ARM Updates)
+F: Documentation/admin-guide/pm/cpufreq.rst
+F: Documentation/admin-guide/pm/intel_pstate.rst
+F: Documentation/cpu-freq/
+F: Documentation/devicetree/bindings/cpufreq/
+F: drivers/cpufreq/
+F: include/linux/cpufreq.h
+F: include/linux/sched/cpufreq.h
+F: kernel/sched/cpufreq*.c
+F: tools/testing/selftests/cpufreq/
+
+CPU IDLE TIME MANAGEMENT FRAMEWORK
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
+F: Documentation/admin-guide/pm/cpuidle.rst
+F: Documentation/driver-api/pm/cpuidle.rst
+F: drivers/cpuidle/
+F: include/linux/cpuidle.h
+
+CPU POWER MONITORING SUBSYSTEM
+M: Thomas Renninger <trenn@suse.com>
+M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: tools/power/cpupower/
+
+CPUID/MSR DRIVER
+M: "H. Peter Anvin" <hpa@zytor.com>
+S: Maintained
+F: arch/x86/kernel/cpuid.c
+F: arch/x86/kernel/msr.c
+
+CPUIDLE DRIVER - ARM BIG LITTLE
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+L: linux-pm@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
+F: drivers/cpuidle/cpuidle-big_little.c
+
+CPUIDLE DRIVER - ARM EXYNOS
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+M: Kukjin Kim <kgene@kernel.org>
+L: linux-pm@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Supported
+F: arch/arm/mach-exynos/pm.c
+F: drivers/cpuidle/cpuidle-exynos.c
+F: include/linux/platform_data/cpuidle-exynos.h
+
+CPUIDLE DRIVER - ARM PSCI
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-pm@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/cpuidle/cpuidle-psci.c
+
+CPUIDLE DRIVER - ARM PSCI PM DOMAIN
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-pm@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/cpuidle/cpuidle-psci.h
+F: drivers/cpuidle/cpuidle-psci-domain.c
+
+CRAMFS FILESYSTEM
+M: Nicolas Pitre <nico@fluxnic.net>
+S: Maintained
+F: Documentation/filesystems/cramfs.rst
+F: fs/cramfs/
+
+CREATIVE SB0540
+M: Bastien Nocera <hadess@hadess.net>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-creative-sb0540.c
+
+CRYPTO API
+M: Herbert Xu <herbert@gondor.apana.org.au>
+M: "David S. Miller" <davem@davemloft.net>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git
+F: Documentation/crypto/
+F: Documentation/devicetree/bindings/crypto/
+F: arch/*/crypto/
+F: crypto/
+F: drivers/crypto/
+F: include/crypto/
+F: include/linux/crypto*
+F: lib/crypto/
+
+CRYPTOGRAPHIC RANDOM NUMBER GENERATOR
+M: Neil Horman <nhorman@tuxdriver.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: crypto/ansi_cprng.c
+F: crypto/rng.c
+
+CS3308 MEDIA DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: http://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/cs3308.c
+
+CS5535 Audio ALSA driver
+M: Jaya Kumar <jayakumar.alsa@gmail.com>
+S: Maintained
+F: sound/pci/cs5535audio/
+
+CSI DRIVERS FOR ALLWINNER V3s
+M: Yong Deng <yong.deng@magewell.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
+F: drivers/media/platform/sunxi/sun6i-csi/
+
+CW1200 WLAN driver
+M: Solomon Peachy <pizza@shaftnet.org>
+S: Maintained
+F: drivers/net/wireless/st/cw1200/
+
+CX18 VIDEO4LINUX DRIVER
+M: Andy Walls <awalls@md.metrocast.net>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/cx18/
+F: include/uapi/linux/ivtv*
+
+CX2341X MPEG ENCODER HELPER MODULE
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/common/cx2341x*
+F: include/media/drv-intf/cx2341x.h
+
+CX24120 MEDIA DRIVER
+M: Jemma Denson <jdenson@gmail.com>
+M: Patrick Boettcher <patrick.boettcher@posteo.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/cx24120*
+
+CX88 VIDEO4LINUX DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/driver-api/media/drivers/cx88*
+F: drivers/media/pci/cx88/
+
+CXD2820R MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/cxd2820r*
+
+CXGB3 ETHERNET DRIVER (CXGB3)
+M: Raju Rangoju <rajur@chelsio.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/net/ethernet/chelsio/cxgb3/
+
+CXGB3 ISCSI DRIVER (CXGB3I)
+M: Karen Xie <kxie@chelsio.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/scsi/cxgbi/cxgb3i
+
+CXGB4 CRYPTO DRIVER (chcr)
+M: Ayush Sawal <ayush.sawal@chelsio.com>
+M: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
+M: Rohit Maheshwari <rohitm@chelsio.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/crypto/chelsio
+
+CXGB4 INLINE CRYPTO DRIVER
+M: Ayush Sawal <ayush.sawal@chelsio.com>
+M: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
+M: Rohit Maheshwari <rohitm@chelsio.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/net/ethernet/chelsio/inline_crypto/
+
+CXGB4 ETHERNET DRIVER (CXGB4)
+M: Raju Rangoju <rajur@chelsio.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/net/ethernet/chelsio/cxgb4/
+
+CXGB4 ISCSI DRIVER (CXGB4I)
+M: Karen Xie <kxie@chelsio.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/scsi/cxgbi/cxgb4i
+
+CXGB4 IWARP RNIC DRIVER (IW_CXGB4)
+M: Potnuri Bharat Teja <bharat@chelsio.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.openfabrics.org
+F: drivers/infiniband/hw/cxgb4/
+F: include/uapi/rdma/cxgb4-abi.h
+
+CXGB4VF ETHERNET DRIVER (CXGB4VF)
+M: Raju Rangoju <rajur@chelsio.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.chelsio.com
+F: drivers/net/ethernet/chelsio/cxgb4vf/
+
+CXL (IBM Coherent Accelerator Processor Interface CAPI) DRIVER
+M: Frederic Barrat <fbarrat@linux.ibm.com>
+M: Andrew Donnellan <ajd@linux.ibm.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: Documentation/ABI/testing/sysfs-class-cxl
+F: Documentation/powerpc/cxl.rst
+F: arch/powerpc/platforms/powernv/pci-cxl.c
+F: drivers/misc/cxl/
+F: include/misc/cxl*
+F: include/uapi/misc/cxl.h
+
+CXLFLASH (IBM Coherent Accelerator Processor Interface CAPI Flash) SCSI DRIVER
+M: Manoj N. Kumar <manoj@linux.ibm.com>
+M: Matthew R. Ochs <mrochs@linux.ibm.com>
+M: Uma Krishnan <ukrishn@linux.ibm.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: Documentation/powerpc/cxlflash.rst
+F: drivers/scsi/cxlflash/
+F: include/uapi/scsi/cxlflash_ioctl.h
+
+CYBERPRO FB DRIVER
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.armlinux.org.uk/
+F: drivers/video/fbdev/cyber2000fb.*
+
+CYCLADES PC300 DRIVER
+S: Orphan
+F: drivers/net/wan/pc300*
+
+CYPRESS_FIRMWARE MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/common/cypress_firmware*
+
+CYPRESS CY8CTMA140 TOUCHSCREEN DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/cy8ctma140.c
+
+CYTTSP TOUCHSCREEN DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/cyttsp*
+
+D-LINK DIR-685 TOUCHKEYS DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-input@vger.kernel.org
+S: Supported
+F: drivers/input/keyboard/dlink-dir685-touchkeys.c
+
+DALLAS/MAXIM DS1685-FAMILY REAL TIME CLOCK
+M: Joshua Kinard <kumba@gentoo.org>
+S: Maintained
+F: drivers/rtc/rtc-ds1685.c
+F: include/linux/rtc/ds1685.h
+
+DAMA SLAVE for AX.25
+M: Joerg Reuter <jreuter@yaina.de>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://yaina.de/jreuter/
+W: http://www.qsl.net/dl1bke/
+F: net/ax25/af_ax25.c
+F: net/ax25/ax25_dev.c
+F: net/ax25/ax25_ds_*
+F: net/ax25/ax25_in.c
+F: net/ax25/ax25_out.c
+F: net/ax25/ax25_timer.c
+F: net/ax25/sysctl_net_ax25.c
+
+DATA ACCESS MONITOR
+M: SeongJae Park <sjpark@amazon.de>
+L: linux-mm@kvack.org
+S: Maintained
+F: Documentation/admin-guide/mm/damon/
+F: Documentation/vm/damon/
+F: include/linux/damon.h
+F: include/trace/events/damon.h
+F: mm/damon/
+F: tools/testing/selftests/damon/
+
+DAVICOM FAST ETHERNET (DMFE) NETWORK DRIVER
+L: netdev@vger.kernel.org
+S: Orphan
+F: Documentation/networking/device_drivers/ethernet/dec/dmfe.rst
+F: drivers/net/ethernet/dec/tulip/dmfe.c
+
+DC390/AM53C974 SCSI driver
+M: Hannes Reinecke <hare@suse.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/am53c974.c
+
+DC395x SCSI driver
+M: Oliver Neukum <oliver@neukum.org>
+M: Ali Akcaagac <aliakc@web.de>
+M: Jamie Lenehan <lenehan@twibble.org>
+L: dc395x@twibble.org
+S: Maintained
+W: http://twibble.org/dist/dc395x/
+W: http://lists.twibble.org/mailman/listinfo/dc395x/
+F: Documentation/scsi/dc395x.rst
+F: drivers/scsi/dc395x.*
+
+DCCP PROTOCOL
+L: dccp@vger.kernel.org
+S: Orphan
+W: http://www.linuxfoundation.org/collaborate/workgroups/networking/dccp
+F: include/linux/dccp.h
+F: include/linux/tfrc.h
+F: include/uapi/linux/dccp.h
+F: net/dccp/
+
+DECnet NETWORK LAYER
+L: linux-decnet-user@lists.sourceforge.net
+S: Orphan
+W: http://linux-decnet.sourceforge.net
+F: Documentation/networking/decnet.rst
+F: net/decnet/
+
+DECSTATION PLATFORM SUPPORT
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+L: linux-mips@vger.kernel.org
+S: Maintained
+W: http://www.linux-mips.org/wiki/DECstation
+F: arch/mips/dec/
+F: arch/mips/include/asm/dec/
+F: arch/mips/include/asm/mach-dec/
+
+DEFXX FDDI NETWORK DRIVER
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+S: Maintained
+F: drivers/net/fddi/defxx.*
+
+DEFZA FDDI NETWORK DRIVER
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+S: Maintained
+F: drivers/net/fddi/defza.*
+
+DEINTERLACE DRIVERS FOR ALLWINNER H3
+M: Jernej Skrabec <jernej.skrabec@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun8i-h3-deinterlace.yaml
+F: drivers/media/platform/sunxi/sun8i-di/
+
+DELL LAPTOP DRIVER
+M: Matthew Garrett <mjg59@srcf.ucam.org>
+M: Pali Rohár <pali@kernel.org>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell-laptop.c
+
+DELL LAPTOP FREEFALL DRIVER
+M: Pali Rohár <pali@kernel.org>
+S: Maintained
+F: drivers/platform/x86/dell/dell-smo8800.c
+
+DELL LAPTOP RBTN DRIVER
+M: Pali Rohár <pali@kernel.org>
+S: Maintained
+F: drivers/platform/x86/dell/dell-rbtn.*
+
+DELL LAPTOP SMM DRIVER
+M: Pali Rohár <pali@kernel.org>
+S: Maintained
+F: drivers/hwmon/dell-smm-hwmon.c
+F: include/uapi/linux/i8k.h
+
+DELL REMOTE BIOS UPDATE DRIVER
+M: Stuart Hayes <stuart.w.hayes@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell_rbu.c
+
+DELL SMBIOS DRIVER
+M: Pali Rohár <pali@kernel.org>
+L: Dell.Client.Kernel@dell.com
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell-smbios.*
+
+DELL SMBIOS SMM DRIVER
+L: Dell.Client.Kernel@dell.com
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell-smbios-smm.c
+
+DELL SMBIOS WMI DRIVER
+L: Dell.Client.Kernel@dell.com
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell-smbios-wmi.c
+F: tools/wmi/dell-smbios-example.c
+
+DELL SYSTEMS MANAGEMENT BASE DRIVER (dcdbas)
+M: Stuart Hayes <stuart.w.hayes@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/driver-api/dcdbas.rst
+F: drivers/platform/x86/dell/dcdbas.*
+
+DELL WMI DESCRIPTOR DRIVER
+L: Dell.Client.Kernel@dell.com
+S: Maintained
+F: drivers/platform/x86/dell/dell-wmi-descriptor.c
+
+DELL WMI SYSMAN DRIVER
+M: Divya Bharathi <divya.bharathi@dell.com>
+M: Prasanth Ksr <prasanth.ksr@dell.com>
+L: Dell.Client.Kernel@dell.com
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-firmware-attributes
+F: drivers/platform/x86/dell/dell-wmi-sysman/
+
+DELL WMI NOTIFICATIONS DRIVER
+M: Matthew Garrett <mjg59@srcf.ucam.org>
+M: Pali Rohár <pali@kernel.org>
+S: Maintained
+F: drivers/platform/x86/dell/dell-wmi-base.c
+
+DELL WMI HARDWARE PRIVACY SUPPORT
+M: Perry Yuan <Perry.Yuan@dell.com>
+L: Dell.Client.Kernel@dell.com
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/dell/dell-wmi-privacy.c
+
+DELTA ST MEDIA DRIVER
+M: Hugues Fruchet <hugues.fruchet@foss.st.com>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/platform/sti/delta
+
+DELTA DPS920AB PSU DRIVER
+M: Robert Marko <robert.marko@sartura.hr>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/dps920ab.rst
+F: drivers/hwmon/pmbus/dps920ab.c
+
+DENALI NAND DRIVER
+L: linux-mtd@lists.infradead.org
+S: Orphan
+F: drivers/mtd/nand/raw/denali*
+
+DESIGNWARE EDMA CORE IP DRIVER
+M: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
+L: dmaengine@vger.kernel.org
+S: Maintained
+F: drivers/dma/dw-edma/
+F: include/linux/dma/edma.h
+
+DESIGNWARE XDATA IP DRIVER
+M: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/misc-devices/dw-xdata-pcie.rst
+F: drivers/misc/dw-xdata-pcie.c
+
+DESIGNWARE USB2 DRD IP DRIVER
+M: Minas Harutyunyan <hminas@synopsys.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
+F: drivers/usb/dwc2/
+
+DESIGNWARE USB3 DRD IP DRIVER
+M: Felipe Balbi <balbi@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
+F: drivers/usb/dwc3/
+
+DEVANTECH SRF ULTRASONIC RANGER IIO DRIVER
+M: Andreas Klinger <ak@it-klinger.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-iio-distance-srf08
+F: drivers/iio/proximity/srf*.c
+
+DEVICE COREDUMP (DEV_COREDUMP)
+M: Johannes Berg <johannes@sipsolutions.net>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/base/devcoredump.c
+F: include/linux/devcoredump.h
+
+DEVICE DEPENDENCY HELPER SCRIPT
+M: Saravana Kannan <saravanak@google.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: scripts/dev-needs.sh
+
+DEVICE DIRECT ACCESS (DAX)
+M: Dan Williams <dan.j.williams@intel.com>
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Dave Jiang <dave.jiang@intel.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+F: drivers/dax/
+
+DEVICE FREQUENCY (DEVFREQ)
+M: MyungJoo Ham <myungjoo.ham@samsung.com>
+M: Kyungmin Park <kyungmin.park@samsung.com>
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
+F: Documentation/devicetree/bindings/devfreq/
+F: drivers/devfreq/
+F: include/linux/devfreq.h
+F: include/trace/events/devfreq.h
+
+DEVICE FREQUENCY EVENT (DEVFREQ-EVENT)
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
+F: Documentation/devicetree/bindings/devfreq/event/
+F: drivers/devfreq/devfreq-event.c
+F: drivers/devfreq/event/
+F: include/dt-bindings/pmu/exynos_ppmu.h
+F: include/linux/devfreq-event.h
+
+DEVICE NUMBER REGISTRY
+M: Torben Mathiasen <device@lanana.org>
+S: Maintained
+W: http://lanana.org/docs/device-list/index.html
+
+DEVICE RESOURCE MANAGEMENT HELPERS
+M: Hans de Goede <hdegoede@redhat.com>
+R: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
+S: Maintained
+F: include/linux/devm-helpers.h
+
+DEVICE-MAPPER (LVM)
+M: Alasdair Kergon <agk@redhat.com>
+M: Mike Snitzer <snitzer@redhat.com>
+M: dm-devel@redhat.com
+L: dm-devel@redhat.com
+S: Maintained
+W: http://sources.redhat.com/dm
+Q: http://patchwork.kernel.org/project/dm-devel/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git
+T: quilt http://people.redhat.com/agk/patches/linux/editing/
+F: Documentation/admin-guide/device-mapper/
+F: drivers/md/Kconfig
+F: drivers/md/Makefile
+F: drivers/md/dm*
+F: drivers/md/persistent-data/
+F: include/linux/device-mapper.h
+F: include/linux/dm-*.h
+F: include/uapi/linux/dm-*.h
+
+DEVLINK
+M: Jiri Pirko <jiri@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/devlink
+F: include/net/devlink.h
+F: include/uapi/linux/devlink.h
+F: net/core/devlink.c
+
+DH ELECTRONICS IMX6 DHCOM BOARD SUPPORT
+M: Christoph Niedermaier <cniedermaier@dh-electronics.com>
+L: kernel@dh-electronics.com
+S: Maintained
+F: arch/arm/boot/dts/imx6*-dhcom-*
+
+DH ELECTRONICS STM32MP1 DHCOM/DHCOR BOARD SUPPORT
+M: Marek Vasut <marex@denx.de>
+L: kernel@dh-electronics.com
+S: Maintained
+F: arch/arm/boot/dts/stm32mp1*-dhcom-*
+F: arch/arm/boot/dts/stm32mp1*-dhcor-*
+
+DIALOG SEMICONDUCTOR DRIVERS
+M: Support Opensource <support.opensource@diasemi.com>
+S: Supported
+W: http://www.dialog-semiconductor.com/products
+F: Documentation/devicetree/bindings/input/da90??-onkey.txt
+F: Documentation/devicetree/bindings/input/dlg,da72??.txt
+F: Documentation/devicetree/bindings/mfd/da90*.txt
+F: Documentation/devicetree/bindings/regulator/dlg,da9*.yaml
+F: Documentation/devicetree/bindings/regulator/da92*.txt
+F: Documentation/devicetree/bindings/regulator/slg51000.txt
+F: Documentation/devicetree/bindings/sound/da[79]*.txt
+F: Documentation/devicetree/bindings/thermal/da90??-thermal.txt
+F: Documentation/devicetree/bindings/watchdog/da90??-wdt.txt
+F: Documentation/hwmon/da90??.rst
+F: drivers/gpio/gpio-da90??.c
+F: drivers/hwmon/da90??-hwmon.c
+F: drivers/iio/adc/da91??-*.c
+F: drivers/input/misc/da72??.[ch]
+F: drivers/input/misc/da90??_onkey.c
+F: drivers/input/touchscreen/da9052_tsi.c
+F: drivers/leds/leds-da90??.c
+F: drivers/mfd/da903x.c
+F: drivers/mfd/da90??-*.c
+F: drivers/mfd/da91??-*.c
+F: drivers/pinctrl/pinctrl-da90??.c
+F: drivers/power/supply/da9052-battery.c
+F: drivers/power/supply/da91??-*.c
+F: drivers/regulator/da9???-regulator.[ch]
+F: drivers/regulator/slg51000-regulator.[ch]
+F: drivers/rtc/rtc-da90??.c
+F: drivers/thermal/da90??-thermal.c
+F: drivers/video/backlight/da90??_bl.c
+F: drivers/watchdog/da90??_wdt.c
+F: include/dt-bindings/regulator/dlg,da9*-regulator.h
+F: include/linux/mfd/da903x.h
+F: include/linux/mfd/da9052/
+F: include/linux/mfd/da9055/
+F: include/linux/mfd/da9062/
+F: include/linux/mfd/da9063/
+F: include/linux/mfd/da9150/
+F: include/linux/regulator/da9211.h
+F: include/sound/da[79]*.h
+F: sound/soc/codecs/da[79]*.[ch]
+
+DIAMOND SYSTEMS GPIO-MM GPIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-gpio-mm.c
+
+DIOLAN U2C-12 I2C DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-diolan-u2c.c
+
+DIRECTORY NOTIFICATION (DNOTIFY)
+M: Jan Kara <jack@suse.cz>
+R: Amir Goldstein <amir73il@gmail.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: Documentation/filesystems/dnotify.rst
+F: fs/notify/dnotify/
+F: include/linux/dnotify.h
+
+DISK GEOMETRY AND PARTITION HANDLING
+M: Andries Brouwer <aeb@cwi.nl>
+S: Maintained
+W: http://www.win.tue.nl/~aeb/linux/Large-Disk.html
+W: http://www.win.tue.nl/~aeb/linux/zip/zip-1.html
+W: http://www.win.tue.nl/~aeb/partitions/partition_types-1.html
+
+DISKQUOTA
+M: Jan Kara <jack@suse.com>
+S: Maintained
+F: Documentation/filesystems/quota.rst
+F: fs/quota/
+F: include/linux/quota*.h
+F: include/uapi/linux/quota*.h
+
+DISPLAYLINK USB 2.0 FRAMEBUFFER DRIVER (UDLFB)
+M: Bernie Thompson <bernie@plugable.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+W: http://plugable.com/category/projects/udlfb/
+F: Documentation/fb/udlfb.rst
+F: drivers/video/fbdev/udlfb.c
+F: include/video/udlfb.h
+
+DISTRIBUTED LOCK MANAGER (DLM)
+M: Christine Caulfield <ccaulfie@redhat.com>
+M: David Teigland <teigland@redhat.com>
+L: cluster-devel@redhat.com
+S: Supported
+W: http://sources.redhat.com/cluster/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm.git
+F: fs/dlm/
+
+DMA BUFFER SHARING FRAMEWORK
+M: Sumit Semwal <sumit.semwal@linaro.org>
+M: Christian König <christian.koenig@amd.com>
+L: linux-media@vger.kernel.org
+L: dri-devel@lists.freedesktop.org
+L: linaro-mm-sig@lists.linaro.org (moderated for non-subscribers)
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/driver-api/dma-buf.rst
+F: drivers/dma-buf/
+F: include/linux/*fence.h
+F: include/linux/dma-buf*
+F: include/linux/dma-resv.h
+K: \bdma_(?:buf|fence|resv)\b
+
+DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
+M: Vinod Koul <vkoul@kernel.org>
+L: dmaengine@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-dmaengine/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git
+F: Documentation/devicetree/bindings/dma/
+F: Documentation/driver-api/dmaengine/
+F: drivers/dma/
+F: include/linux/dma/
+F: include/linux/dmaengine.h
+F: include/linux/of_dma.h
+
+DMA MAPPING HELPERS
+M: Christoph Hellwig <hch@lst.de>
+M: Marek Szyprowski <m.szyprowski@samsung.com>
+R: Robin Murphy <robin.murphy@arm.com>
+L: iommu@lists.linux-foundation.org
+S: Supported
+W: http://git.infradead.org/users/hch/dma-mapping.git
+T: git git://git.infradead.org/users/hch/dma-mapping.git
+F: include/asm-generic/dma-mapping.h
+F: include/linux/dma-direct.h
+F: include/linux/dma-mapping.h
+F: include/linux/dma-map-ops.h
+F: kernel/dma/
+
+DMA MAPPING BENCHMARK
+M: Barry Song <song.bao.hua@hisilicon.com>
+L: iommu@lists.linux-foundation.org
+F: kernel/dma/map_benchmark.c
+F: tools/testing/selftests/dma/
+
+DMA-BUF HEAPS FRAMEWORK
+M: Sumit Semwal <sumit.semwal@linaro.org>
+R: Benjamin Gaignard <benjamin.gaignard@linaro.org>
+R: Liam Mark <lmark@codeaurora.org>
+R: Laura Abbott <labbott@redhat.com>
+R: Brian Starkey <Brian.Starkey@arm.com>
+R: John Stultz <john.stultz@linaro.org>
+L: linux-media@vger.kernel.org
+L: dri-devel@lists.freedesktop.org
+L: linaro-mm-sig@lists.linaro.org (moderated for non-subscribers)
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/dma-buf/dma-heap.c
+F: drivers/dma-buf/heaps/*
+F: include/linux/dma-heap.h
+F: include/uapi/linux/dma-heap.h
+
+DMC FREQUENCY DRIVER FOR SAMSUNG EXYNOS5422
+M: Lukasz Luba <lukasz.luba@arm.com>
+L: linux-pm@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/memory-controllers/samsung,exynos5422-dmc.yaml
+F: drivers/memory/samsung/exynos5422-dmc.c
+
+DME1737 HARDWARE MONITOR DRIVER
+M: Juerg Haefliger <juergh@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/dme1737.rst
+F: drivers/hwmon/dme1737.c
+
+DMI/SMBIOS SUPPORT
+M: Jean Delvare <jdelvare@suse.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging.git dmi-for-next
+F: Documentation/ABI/testing/sysfs-firmware-dmi-tables
+F: drivers/firmware/dmi-id.c
+F: drivers/firmware/dmi_scan.c
+F: include/linux/dmi.h
+
+DOCUMENTATION
+M: Jonathan Corbet <corbet@lwn.net>
+L: linux-doc@vger.kernel.org
+S: Maintained
+P: Documentation/doc-guide/maintainer-profile.rst
+T: git git://git.lwn.net/linux.git docs-next
+F: Documentation/
+F: scripts/documentation-file-ref-check
+F: scripts/kernel-doc
+F: scripts/sphinx-pre-install
+X: Documentation/ABI/
+X: Documentation/admin-guide/media/
+X: Documentation/devicetree/
+X: Documentation/driver-api/media/
+X: Documentation/firmware-guide/acpi/
+X: Documentation/i2c/
+X: Documentation/power/
+X: Documentation/spi/
+X: Documentation/userspace-api/media/
+
+DOCUMENTATION REPORTING ISSUES
+M: Thorsten Leemhuis <linux@leemhuis.info>
+L: linux-doc@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/reporting-issues.rst
+
+DOCUMENTATION SCRIPTS
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-doc@vger.kernel.org
+S: Maintained
+F: Documentation/sphinx/parse-headers.pl
+F: scripts/documentation-file-ref-check
+F: scripts/sphinx-pre-install
+
+DOCUMENTATION/ITALIAN
+M: Federico Vaga <federico.vaga@vaga.pv.it>
+L: linux-doc@vger.kernel.org
+S: Maintained
+F: Documentation/translations/it_IT
+
+DONGWOON DW9714 LENS VOICE COIL DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.txt
+F: drivers/media/i2c/dw9714.c
+
+DONGWOON DW9768 LENS VOICE COIL DRIVER
+M: Dongchun Zhu <dongchun.zhu@mediatek.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9768.yaml
+F: drivers/media/i2c/dw9768.c
+
+DONGWOON DW9807 LENS VOICE COIL DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/dongwoon,dw9807-vcm.txt
+F: drivers/media/i2c/dw9807-vcm.c
+
+DOUBLETALK DRIVER
+M: "James R. Van Zandt" <jrv@vanzandt.mv.com>
+L: blinux-list@redhat.com
+S: Maintained
+F: drivers/char/dtlk.c
+F: include/linux/dtlk.h
+
+DPAA2 DATAPATH I/O (DPIO) DRIVER
+M: Roy Pledge <Roy.Pledge@nxp.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/soc/fsl/dpio
+
+DPAA2 ETHERNET DRIVER
+M: Ioana Ciornei <ioana.ciornei@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/networking/device_drivers/ethernet/freescale/dpaa2/ethernet-driver.rst
+F: Documentation/networking/device_drivers/ethernet/freescale/dpaa2/mac-phy-support.rst
+F: drivers/net/ethernet/freescale/dpaa2/Kconfig
+F: drivers/net/ethernet/freescale/dpaa2/Makefile
+F: drivers/net/ethernet/freescale/dpaa2/dpaa2-eth*
+F: drivers/net/ethernet/freescale/dpaa2/dpaa2-mac*
+F: drivers/net/ethernet/freescale/dpaa2/dpkg.h
+F: drivers/net/ethernet/freescale/dpaa2/dpmac*
+F: drivers/net/ethernet/freescale/dpaa2/dpni*
+
+DPAA2 ETHERNET SWITCH DRIVER
+M: Ioana Ciornei <ioana.ciornei@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/networking/device_drivers/ethernet/freescale/dpaa2/switch-driver.rst
+F: drivers/net/ethernet/freescale/dpaa2/dpaa2-switch*
+F: drivers/net/ethernet/freescale/dpaa2/dpsw*
+
+DPT_I2O SCSI RAID DRIVER
+M: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+W: http://www.adaptec.com/
+F: drivers/scsi/dpt*
+F: drivers/scsi/dpt/
+
+DRBD DRIVER
+M: Philipp Reisner <philipp.reisner@linbit.com>
+M: Lars Ellenberg <lars.ellenberg@linbit.com>
+L: drbd-dev@lists.linbit.com
+S: Supported
+W: http://www.drbd.org
+T: git git://git.linbit.com/linux-drbd.git
+T: git git://git.linbit.com/drbd-8.4.git
+F: Documentation/admin-guide/blockdev/
+F: drivers/block/drbd/
+F: lib/lru_cache.c
+
+DRIVER COMPONENT FRAMEWORK
+L: dri-devel@lists.freedesktop.org
+F: drivers/base/component.c
+F: include/linux/component.h
+
+DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+R: "Rafael J. Wysocki" <rafael@kernel.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
+F: Documentation/core-api/kobject.rst
+F: drivers/base/
+F: fs/debugfs/
+F: fs/sysfs/
+F: include/linux/debugfs.h
+F: include/linux/kobj*
+F: lib/kobj*
+
+DRIVERS FOR OMAP ADAPTIVE VOLTAGE SCALING (AVS)
+M: Nishanth Menon <nm@ti.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: drivers/soc/ti/smartreflex.c
+F: include/linux/power/smartreflex.h
+
+DRM DRIVER FOR ALLWINNER DE2 AND DE3 ENGINE
+M: Maxime Ripard <mripard@kernel.org>
+M: Chen-Yu Tsai <wens@csie.org>
+R: Jernej Skrabec <jernej.skrabec@gmail.com>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/sun4i/sun8i*
+
+DRM DRIVER FOR ARM PL111 CLCD
+M: Emma Anholt <emma@anholt.net>
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/pl111/
+
+DRM DRIVER FOR ARM VERSATILE TFT PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/arm,versatile-tft-panel.yaml
+F: drivers/gpu/drm/panel/panel-arm-versatile.c
+
+DRM DRIVER FOR ASPEED BMC GFX
+M: Joel Stanley <joel@jms.id.au>
+L: linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/gpu/aspeed-gfx.txt
+F: drivers/gpu/drm/aspeed/
+
+DRM DRIVER FOR AST SERVER GRAPHICS CHIPS
+M: Dave Airlie <airlied@redhat.com>
+R: Thomas Zimmermann <tzimmermann@suse.de>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/ast/
+
+DRM DRIVER FOR BOCHS VIRTUAL GPU
+M: Gerd Hoffmann <kraxel@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tiny/bochs.c
+
+DRM DRIVER FOR BOE HIMAX8279D PANELS
+M: Jerry Han <hanxu5@huaqin.corp-partner.google.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml
+F: drivers/gpu/drm/panel/panel-boe-himax8279d.c
+
+DRM DRIVER FOR CHIPONE ICN6211 MIPI-DSI to RGB CONVERTER BRIDGE
+M: Jagan Teki <jagan@amarulasolutions.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/bridge/chipone,icn6211.yaml
+F: drivers/gpu/drm/bridge/chipone-icn6211.c
+
+DRM DRIVER FOR FARADAY TVE200 TV ENCODER
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tve200/
+
+DRM DRIVER FOR FEIXIN K101 IM2BA02 MIPI-DSI LCD PANELS
+M: Icenowy Zheng <icenowy@aosc.io>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml
+F: drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
+
+DRM DRIVER FOR FEIYANG FY07024DI26A30-D MIPI-DSI LCD PANELS
+M: Jagan Teki <jagan@amarulasolutions.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/feiyang,fy07024di26a30d.yaml
+F: drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
+
+DRM DRIVER FOR GENERIC USB DISPLAY
+M: Noralf Trønnes <noralf@tronnes.org>
+S: Maintained
+W: https://github.com/notro/gud/wiki
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/gud/
+F: include/drm/gud.h
+
+DRM DRIVER FOR GRAIN MEDIA GM12U320 PROJECTORS
+M: Hans de Goede <hdegoede@redhat.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tiny/gm12u320.c
+
+DRM DRIVER FOR HX8357D PANELS
+M: Emma Anholt <emma@anholt.net>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/himax,hx8357d.txt
+F: drivers/gpu/drm/tiny/hx8357d.c
+
+DRM DRIVER FOR ILITEK ILI9225 PANELS
+M: David Lechner <david@lechnology.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/ilitek,ili9225.txt
+F: drivers/gpu/drm/tiny/ili9225.c
+
+DRM DRIVER FOR ILITEK ILI9486 PANELS
+M: Kamlesh Gurudasani <kamlesh.gurudasani@gmail.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/ilitek,ili9486.yaml
+F: drivers/gpu/drm/tiny/ili9486.c
+
+DRM DRIVER FOR INTEL I810 VIDEO CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/i810/
+F: include/uapi/drm/i810_drm.h
+
+DRM DRIVER FOR LVDS PANELS
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: dri-devel@lists.freedesktop.org
+T: git git://anongit.freedesktop.org/drm/drm-misc
+S: Maintained
+F: drivers/gpu/drm/panel/panel-lvds.c
+F: Documentation/devicetree/bindings/display/panel/lvds.yaml
+
+DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
+M: Guido Günther <agx@sigxcpu.org>
+R: Purism Kernel Team <kernel@puri.sm>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
+F: drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
+
+DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/mga/
+F: include/uapi/drm/mga_drm.h
+
+DRM DRIVER FOR MGA G200 GRAPHICS CHIPS
+M: Dave Airlie <airlied@redhat.com>
+R: Thomas Zimmermann <tzimmermann@suse.de>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/mgag200/
+
+DRM DRIVER FOR MI0283QT
+M: Noralf Trønnes <noralf@tronnes.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/multi-inno,mi0283qt.txt
+F: drivers/gpu/drm/tiny/mi0283qt.c
+
+DRM DRIVER FOR MSM ADRENO GPU
+M: Rob Clark <robdclark@gmail.com>
+M: Sean Paul <sean@poorly.run>
+L: linux-arm-msm@vger.kernel.org
+L: dri-devel@lists.freedesktop.org
+L: freedreno@lists.freedesktop.org
+S: Maintained
+T: git https://gitlab.freedesktop.org/drm/msm.git
+F: Documentation/devicetree/bindings/display/msm/
+F: drivers/gpu/drm/msm/
+F: include/uapi/drm/msm_drm.h
+
+DRM DRIVER FOR NOVATEK NT35510 PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/novatek,nt35510.yaml
+F: drivers/gpu/drm/panel/panel-novatek-nt35510.c
+
+DRM DRIVER FOR NOVATEK NT36672A PANELS
+M: Sumit Semwal <sumit.semwal@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/novatek,nt36672a.yaml
+F: drivers/gpu/drm/panel/panel-novatek-nt36672a.c
+
+DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS
+M: Ben Skeggs <bskeggs@redhat.com>
+L: dri-devel@lists.freedesktop.org
+L: nouveau@lists.freedesktop.org
+S: Supported
+T: git git://github.com/skeggsb/linux
+F: drivers/gpu/drm/nouveau/
+F: include/uapi/drm/nouveau_drm.h
+
+DRM DRIVER FOR OLIMEX LCD-OLINUXINO PANELS
+M: Stefan Mavrodiev <stefan@olimex.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/olimex,lcd-olinuxino.yaml
+F: drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c
+
+DRM DRIVER FOR PERVASIVE DISPLAYS REPAPER PANELS
+M: Noralf Trønnes <noralf@tronnes.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/repaper.txt
+F: drivers/gpu/drm/tiny/repaper.c
+
+DRM DRIVER FOR QEMU'S CIRRUS DEVICE
+M: Dave Airlie <airlied@redhat.com>
+M: Gerd Hoffmann <kraxel@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Obsolete
+W: https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tiny/cirrus.c
+
+DRM DRIVER FOR QXL VIRTUAL GPU
+M: Dave Airlie <airlied@redhat.com>
+M: Gerd Hoffmann <kraxel@redhat.com>
+L: virtualization@lists.linux-foundation.org
+L: spice-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/qxl/
+F: include/uapi/drm/qxl_drm.h
+
+DRM DRIVER FOR RAGE 128 VIDEO CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/r128/
+F: include/uapi/drm/r128_drm.h
+
+DRM DRIVER FOR RAYDIUM RM67191 PANELS
+M: Robert Chiras <robert.chiras@nxp.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml
+F: drivers/gpu/drm/panel/panel-raydium-rm67191.c
+
+DRM DRIVER FOR SAMSUNG DB7430 PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
+F: drivers/gpu/drm/panel/panel-samsung-db7430.c
+
+DRM DRIVER FOR SITRONIX ST7703 PANELS
+M: Guido Günther <agx@sigxcpu.org>
+R: Purism Kernel Team <kernel@puri.sm>
+R: Ondrej Jirman <megous@megous.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.yaml
+F: drivers/gpu/drm/panel/panel-sitronix-st7703.c
+
+DRM DRIVER FOR SAVAGE VIDEO CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/savage/
+F: include/uapi/drm/savage_drm.h
+
+DRM DRIVER FOR SIMPLE FRAMEBUFFERS
+M: Thomas Zimmermann <tzimmermann@suse.de>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tiny/simpledrm.c
+
+DRM DRIVER FOR SIS VIDEO CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/sis/
+F: include/uapi/drm/sis_drm.h
+
+DRM DRIVER FOR SITRONIX ST7586 PANELS
+M: David Lechner <david@lechnology.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/sitronix,st7586.txt
+F: drivers/gpu/drm/tiny/st7586.c
+
+DRM DRIVER FOR SITRONIX ST7701 PANELS
+M: Jagan Teki <jagan@amarulasolutions.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml
+F: drivers/gpu/drm/panel/panel-sitronix-st7701.c
+
+DRM DRIVER FOR SITRONIX ST7735R PANELS
+M: David Lechner <david@lechnology.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
+F: drivers/gpu/drm/tiny/st7735r.c
+
+DRM DRIVER FOR SONY ACX424AKP PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/panel/panel-sony-acx424akp.c
+
+DRM DRIVER FOR ST-ERICSSON MCDE
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/ste,mcde.yaml
+F: drivers/gpu/drm/mcde/
+
+DRM DRIVER FOR TDFX VIDEO CARDS
+S: Orphan / Obsolete
+F: drivers/gpu/drm/tdfx/
+
+DRM DRIVER FOR TPO TPG110 PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml
+F: drivers/gpu/drm/panel/panel-tpo-tpg110.c
+
+DRM DRIVER FOR USB DISPLAYLINK VIDEO ADAPTERS
+M: Dave Airlie <airlied@redhat.com>
+R: Sean Paul <sean@poorly.run>
+R: Thomas Zimmermann <tzimmermann@suse.de>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/udl/
+
+DRM DRIVER FOR VIRTUAL KERNEL MODESETTING (VKMS)
+M: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
+M: Melissa Wen <melissa.srw@gmail.com>
+R: Haneen Mohammed <hamohammed.sa@gmail.com>
+R: Daniel Vetter <daniel@ffwll.ch>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/gpu/vkms.rst
+F: drivers/gpu/drm/vkms/
+
+DRM DRIVER FOR VIRTUALBOX VIRTUAL GPU
+M: Hans de Goede <hdegoede@redhat.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/vboxvideo/
+
+DRM DRIVER FOR VMWARE VIRTUAL GPU
+M: "VMware Graphics" <linux-graphics-maintainer@vmware.com>
+M: Zack Rusin <zackr@vmware.com>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/vmwgfx/
+F: include/uapi/drm/vmwgfx_drm.h
+
+DRM DRIVER FOR WIDECHIPS WS2401 PANELS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/samsung,lms380kf01.yaml
+F: drivers/gpu/drm/panel/panel-widechips-ws2401.c
+
+DRM DRIVERS
+M: David Airlie <airlied@linux.ie>
+M: Daniel Vetter <daniel@ffwll.ch>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+B: https://gitlab.freedesktop.org/drm
+C: irc://irc.oftc.net/dri-devel
+T: git git://anongit.freedesktop.org/drm/drm
+F: Documentation/devicetree/bindings/display/
+F: Documentation/devicetree/bindings/gpu/
+F: Documentation/gpu/
+F: drivers/gpu/
+F: include/drm/
+F: include/linux/vga*
+F: include/uapi/drm/
+
+DRM DRIVERS AND MISC GPU PATCHES
+M: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
+M: Maxime Ripard <mripard@kernel.org>
+M: Thomas Zimmermann <tzimmermann@suse.de>
+S: Maintained
+W: https://01.org/linuxgraphics/gfx-docs/maintainer-tools/drm-misc.html
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/gpu/
+F: drivers/gpu/drm/*
+F: drivers/gpu/vga/
+F: include/drm/drm*
+F: include/linux/vga*
+F: include/uapi/drm/drm*
+
+DRM DRIVERS FOR ALLWINNER A10
+M: Maxime Ripard <mripard@kernel.org>
+M: Chen-Yu Tsai <wens@csie.org>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/allwinner*
+F: drivers/gpu/drm/sun4i/
+
+DRM DRIVERS FOR AMLOGIC SOCS
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: dri-devel@lists.freedesktop.org
+L: linux-amlogic@lists.infradead.org
+S: Supported
+W: http://linux-meson.com/
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
+F: Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml
+F: Documentation/gpu/meson.rst
+F: drivers/gpu/drm/meson/
+
+DRM DRIVERS FOR ATMEL HLCDC
+M: Sam Ravnborg <sam@ravnborg.org>
+M: Boris Brezillon <bbrezillon@kernel.org>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/atmel/
+F: drivers/gpu/drm/atmel-hlcdc/
+
+DRM DRIVERS FOR BRIDGE CHIPS
+M: Andrzej Hajda <a.hajda@samsung.com>
+M: Neil Armstrong <narmstrong@baylibre.com>
+M: Robert Foss <robert.foss@linaro.org>
+R: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
+R: Jonas Karlman <jonas@kwiboo.se>
+R: Jernej Skrabec <jernej.skrabec@gmail.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/bridge/
+
+DRM DRIVERS FOR EXYNOS
+M: Inki Dae <inki.dae@samsung.com>
+M: Joonyoung Shim <jy0922.shim@samsung.com>
+M: Seung-Woo Kim <sw0312.kim@samsung.com>
+M: Kyungmin Park <kyungmin.park@samsung.com>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git
+F: Documentation/devicetree/bindings/display/exynos/
+F: drivers/gpu/drm/exynos/
+F: include/uapi/drm/exynos_drm.h
+
+DRM DRIVERS FOR FREESCALE DCU
+M: Stefan Agner <stefan@agner.ch>
+M: Alison Wang <alison.wang@nxp.com>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/fsl,dcu.txt
+F: Documentation/devicetree/bindings/display/fsl,tcon.txt
+F: drivers/gpu/drm/fsl-dcu/
+
+DRM DRIVERS FOR FREESCALE IMX
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/imx/
+F: drivers/gpu/drm/imx/
+F: drivers/gpu/ipu-v3/
+
+DRM DRIVERS FOR GMA500 (Poulsbo, Moorestown and derivative chipsets)
+M: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://github.com/patjak/drm-gma500
+F: drivers/gpu/drm/gma500/
+
+DRM DRIVERS FOR HISILICON
+M: Xinliang Liu <xinliang.liu@linaro.org>
+M: Tian Tao <tiantao6@hisilicon.com>
+R: John Stultz <john.stultz@linaro.org>
+R: Xinwei Kong <kong.kongxinwei@hisilicon.com>
+R: Chen Feng <puck.chen@hisilicon.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/hisilicon/
+F: drivers/gpu/drm/hisilicon/
+
+DRM DRIVER FOR HYPERV SYNTHETIC VIDEO DEVICE
+M: Deepak Rawat <drawat.floss@gmail.com>
+L: linux-hyperv@vger.kernel.org
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/hyperv
+
+DRM DRIVERS FOR LIMA
+M: Qiang Yu <yuq825@gmail.com>
+L: dri-devel@lists.freedesktop.org
+L: lima@lists.freedesktop.org (moderated for non-subscribers)
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/lima/
+F: include/uapi/drm/lima_drm.h
+
+DRM DRIVERS FOR MEDIATEK
+M: Chun-Kuang Hu <chunkuang.hu@kernel.org>
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: dri-devel@lists.freedesktop.org
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/display/mediatek/
+F: drivers/gpu/drm/mediatek/
+F: drivers/phy/mediatek/phy-mtk-hdmi*
+F: drivers/phy/mediatek/phy-mtk-mipi*
+
+DRM DRIVERS FOR NVIDIA TEGRA
+M: Thierry Reding <thierry.reding@gmail.com>
+L: dri-devel@lists.freedesktop.org
+L: linux-tegra@vger.kernel.org
+S: Supported
+T: git git://anongit.freedesktop.org/tegra/linux.git
+F: Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
+F: drivers/gpu/drm/tegra/
+F: drivers/gpu/host1x/
+F: include/linux/host1x.h
+F: include/uapi/drm/tegra_drm.h
+
+DRM DRIVERS FOR RENESAS
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+L: dri-devel@lists.freedesktop.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/pinchartl/media drm/du/next
+F: Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
+F: Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml
+F: Documentation/devicetree/bindings/display/renesas,du.yaml
+F: drivers/gpu/drm/rcar-du/
+F: drivers/gpu/drm/shmobile/
+F: include/linux/platform_data/shmob_drm.h
+
+DRM DRIVERS FOR ROCKCHIP
+M: Sandy Huang <hjc@rock-chips.com>
+M: Heiko Stübner <heiko@sntech.de>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/rockchip/
+F: drivers/gpu/drm/rockchip/
+
+DRM DRIVERS FOR STI
+M: Benjamin Gaignard <benjamin.gaignard@linaro.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/st,stih4xx.txt
+F: drivers/gpu/drm/sti
+
+DRM DRIVERS FOR STM
+M: Yannick Fertre <yannick.fertre@foss.st.com>
+M: Philippe Cornu <philippe.cornu@foss.st.com>
+M: Benjamin Gaignard <benjamin.gaignard@linaro.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
+F: drivers/gpu/drm/stm
+
+DRM DRIVERS FOR TI KEYSTONE
+M: Jyri Sarha <jyri.sarha@iki.fi>
+M: Tomi Valkeinen <tomba@kernel.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
+F: Documentation/devicetree/bindings/display/ti/ti,j721e-dss.yaml
+F: Documentation/devicetree/bindings/display/ti/ti,k2g-dss.yaml
+F: drivers/gpu/drm/tidss/
+
+DRM DRIVERS FOR TI LCDC
+M: Jyri Sarha <jyri.sarha@iki.fi>
+R: Tomi Valkeinen <tomba@kernel.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/tilcdc/
+F: drivers/gpu/drm/tilcdc/
+
+DRM DRIVERS FOR TI OMAP
+M: Tomi Valkeinen <tomba@kernel.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/ti/
+F: drivers/gpu/drm/omapdrm/
+
+DRM DRIVERS FOR V3D
+M: Emma Anholt <emma@anholt.net>
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
+F: drivers/gpu/drm/v3d/
+F: include/uapi/drm/v3d_drm.h
+
+DRM DRIVERS FOR VC4
+M: Emma Anholt <emma@anholt.net>
+M: Maxime Ripard <mripard@kernel.org>
+S: Supported
+T: git git://github.com/anholt/linux
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/brcm,bcm2835-*.yaml
+F: drivers/gpu/drm/vc4/
+F: include/uapi/drm/vc4_drm.h
+
+DRM DRIVERS FOR VIVANTE GPU IP
+M: Lucas Stach <l.stach@pengutronix.de>
+R: Russell King <linux+etnaviv@armlinux.org.uk>
+R: Christian Gmeiner <christian.gmeiner@gmail.com>
+L: etnaviv@lists.freedesktop.org (moderated for non-subscribers)
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: Documentation/devicetree/bindings/gpu/vivante,gc.yaml
+F: drivers/gpu/drm/etnaviv/
+F: include/uapi/drm/etnaviv_drm.h
+
+DRM DRIVERS FOR XEN
+M: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
+L: dri-devel@lists.freedesktop.org
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/gpu/xen-front.rst
+F: drivers/gpu/drm/xen/
+
+DRM DRIVERS FOR XILINX
+M: Hyun Kwon <hyun.kwon@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/xlnx/
+F: drivers/gpu/drm/xlnx/
+
+DRM PANEL DRIVERS
+M: Thierry Reding <thierry.reding@gmail.com>
+R: Sam Ravnborg <sam@ravnborg.org>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/panel/
+F: drivers/gpu/drm/drm_panel.c
+F: drivers/gpu/drm/panel/
+F: include/drm/drm_panel.h
+
+DRM TTM SUBSYSTEM
+M: Christian Koenig <christian.koenig@amd.com>
+M: Huang Rui <ray.huang@amd.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/ttm/
+F: include/drm/ttm/
+
+DSBR100 USB FM RADIO DRIVER
+M: Alexey Klimov <klimov.linux@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/dsbr100.c
+
+DT3155 MEDIA DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/dt3155/
+
+DVB_USB_AF9015 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/af9015*
+
+DVB_USB_AF9035 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/af9035*
+
+DVB_USB_ANYSEE MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/anysee*
+
+DVB_USB_AU6610 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/au6610*
+
+DVB_USB_CE6230 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/ce6230*
+
+DVB_USB_CXUSB MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/dvb-usb/cxusb*
+
+DVB_USB_EC168 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/ec168*
+
+DVB_USB_GL861 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/gl861*
+
+DVB_USB_MXL111SF MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/mxl111sf.git
+F: drivers/media/usb/dvb-usb-v2/mxl111sf*
+
+DVB_USB_RTL28XXU MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/rtl28xxu*
+
+DVB_USB_V2 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/dvb-usb-v2/dvb_usb*
+F: drivers/media/usb/dvb-usb-v2/usb_urb.c
+
+DYNAMIC DEBUG
+M: Jason Baron <jbaron@akamai.com>
+S: Maintained
+F: include/linux/dynamic_debug.h
+F: lib/dynamic_debug.c
+
+DYNAMIC INTERRUPT MODERATION
+M: Tal Gilboa <talgi@nvidia.com>
+S: Maintained
+F: Documentation/networking/net_dim.rst
+F: include/linux/dim.h
+F: lib/dim/
+
+DZ DECSTATION DZ11 SERIAL DRIVER
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+S: Maintained
+F: drivers/tty/serial/dz.*
+
+E3X0 POWER BUTTON DRIVER
+M: Moritz Fischer <moritz.fischer@ettus.com>
+L: usrp-users@lists.ettus.com
+S: Supported
+W: http://www.ettus.com
+F: Documentation/devicetree/bindings/input/e3x0-button.txt
+F: drivers/input/misc/e3x0-button.c
+
+E4000 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/e4000*
+
+EARTH_PT1 MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/pci/pt1/
+
+EARTH_PT3 MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/pci/pt3/
+
+EC100 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/ec100*
+
+ECRYPT FILE SYSTEM
+M: Tyler Hicks <code@tyhicks.com>
+L: ecryptfs@vger.kernel.org
+S: Odd Fixes
+W: http://ecryptfs.org
+W: https://launchpad.net/ecryptfs
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs.git
+F: Documentation/filesystems/ecryptfs.rst
+F: fs/ecryptfs/
+
+EDAC-AMD64
+M: Yazen Ghannam <yazen.ghannam@amd.com>
+L: linux-edac@vger.kernel.org
+S: Supported
+F: drivers/edac/amd64_edac*
+F: drivers/edac/mce_amd*
+
+EDAC-ARMADA
+M: Jan Luebbe <jlu@pengutronix.de>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/memory-controllers/marvell,mvebu-sdram-controller.yaml
+F: drivers/edac/armada_xp_*
+
+EDAC-AST2500
+M: Stefan Schaeckeler <sschaeck@cisco.com>
+S: Supported
+F: Documentation/devicetree/bindings/edac/aspeed-sdram-edac.txt
+F: drivers/edac/aspeed_edac.c
+
+EDAC-BLUEFIELD
+M: Shravan Kumar Ramani <shravankr@nvidia.com>
+S: Supported
+F: drivers/edac/bluefield_edac.c
+
+EDAC-CALXEDA
+M: Andre Przywara <andre.przywara@arm.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/highbank*
+
+EDAC-CAVIUM OCTEON
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-edac@vger.kernel.org
+L: linux-mips@vger.kernel.org
+S: Supported
+F: drivers/edac/octeon_edac*
+
+EDAC-CAVIUM THUNDERX
+M: Robert Richter <rric@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Odd Fixes
+F: drivers/edac/thunderx_edac*
+
+EDAC-CORE
+M: Borislav Petkov <bp@alien8.de>
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+M: Tony Luck <tony.luck@intel.com>
+R: James Morse <james.morse@arm.com>
+R: Robert Richter <rric@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git edac-for-next
+F: Documentation/admin-guide/ras.rst
+F: Documentation/driver-api/edac.rst
+F: drivers/edac/
+F: include/linux/edac.h
+
+EDAC-DMC520
+M: Lei Wang <lewan@microsoft.com>
+L: linux-edac@vger.kernel.org
+S: Supported
+F: drivers/edac/dmc520_edac.c
+
+EDAC-E752X
+M: Mark Gross <mark.gross@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/e752x_edac.c
+
+EDAC-E7XXX
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/e7xxx_edac.c
+
+EDAC-FSL_DDR
+M: York Sun <york.sun@nxp.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/fsl_ddr_edac.*
+
+EDAC-GHES
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/ghes_edac.c
+
+EDAC-I10NM
+M: Tony Luck <tony.luck@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i10nm_base.c
+
+EDAC-I3000
+L: linux-edac@vger.kernel.org
+S: Orphan
+F: drivers/edac/i3000_edac.c
+
+EDAC-I5000
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i5000_edac.c
+
+EDAC-I5400
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i5400_edac.c
+
+EDAC-I7300
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i7300_edac.c
+
+EDAC-I7CORE
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i7core_edac.c
+
+EDAC-I82443BXGX
+M: Tim Small <tim@buttersideup.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i82443bxgx_edac.c
+
+EDAC-I82975X
+M: "Arvind R." <arvino55@gmail.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/i82975x_edac.c
+
+EDAC-IE31200
+M: Jason Baron <jbaron@akamai.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/ie31200_edac.c
+
+EDAC-IGEN6
+M: Tony Luck <tony.luck@intel.com>
+R: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/igen6_edac.c
+
+EDAC-MPC85XX
+M: Johannes Thumshirn <morbidrsa@gmail.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/mpc85xx_edac.[ch]
+
+EDAC-PASEMI
+M: Egor Martovetsky <egor@pasemi.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/pasemi_edac.c
+
+EDAC-PND2
+M: Tony Luck <tony.luck@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/pnd2_edac.[ch]
+
+EDAC-QCOM
+M: Channagoud Kadabi <ckadabi@codeaurora.org>
+M: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
+L: linux-arm-msm@vger.kernel.org
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/qcom_edac.c
+
+EDAC-R82600
+M: Tim Small <tim@buttersideup.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/r82600_edac.c
+
+EDAC-SBRIDGE
+M: Tony Luck <tony.luck@intel.com>
+R: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/sb_edac.c
+
+EDAC-SIFIVE
+M: Yash Shah <yash.shah@sifive.com>
+L: linux-edac@vger.kernel.org
+S: Supported
+F: drivers/edac/sifive_edac.c
+
+EDAC-SKYLAKE
+M: Tony Luck <tony.luck@intel.com>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/skx_*.[ch]
+
+EDAC-TI
+M: Tero Kristo <kristo@kernel.org>
+L: linux-edac@vger.kernel.org
+S: Odd Fixes
+F: drivers/edac/ti_edac.c
+
+EDIROL UA-101/UA-1000 DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: sound/usb/misc/ua101.c
+
+EFI TEST DRIVER
+M: Ivan Hu <ivan.hu@canonical.com>
+M: Ard Biesheuvel <ardb@kernel.org>
+L: linux-efi@vger.kernel.org
+S: Maintained
+F: drivers/firmware/efi/test/
+
+EFI VARIABLE FILESYSTEM
+M: Matthew Garrett <matthew.garrett@nebula.com>
+M: Jeremy Kerr <jk@ozlabs.org>
+M: Ard Biesheuvel <ardb@kernel.org>
+L: linux-efi@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
+F: fs/efivarfs/
+
+EFIFB FRAMEBUFFER DRIVER
+M: Peter Jones <pjones@redhat.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/efifb.c
+
+EFS FILESYSTEM
+S: Orphan
+W: http://aeschi.ch.eu.org/efs/
+F: fs/efs/
+
+EHEA (IBM pSeries eHEA 10Gb ethernet adapter) DRIVER
+M: Douglas Miller <dougmill@linux.ibm.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/ibm/ehea/
+
+EM28XX VIDEO4LINUX DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/em28xx*
+F: drivers/media/usb/em28xx/
+
+EMBEDDED LINUX
+M: Matt Mackall <mpm@selenic.com>
+M: David Woodhouse <dwmw2@infradead.org>
+L: linux-embedded@vger.kernel.org
+S: Maintained
+
+EMMC CMDQ HOST CONTROLLER INTERFACE (CQHCI) DRIVER
+M: Adrian Hunter <adrian.hunter@intel.com>
+M: Ritesh Harjani <riteshh@codeaurora.org>
+M: Asutosh Das <asutoshd@codeaurora.org>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/cqhci*
+
+EMULEX 10Gbps iSCSI - OneConnect DRIVER
+M: Subbu Seetharaman <subbu.seetharaman@broadcom.com>
+M: Ketan Mukadam <ketan.mukadam@broadcom.com>
+M: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.broadcom.com
+F: drivers/scsi/be2iscsi/
+
+EMULEX 10Gbps NIC BE2, BE3-R, Lancer, Skyhawk-R DRIVER (be2net)
+M: Ajit Khaparde <ajit.khaparde@broadcom.com>
+M: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
+M: Somnath Kotur <somnath.kotur@broadcom.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.emulex.com
+F: drivers/net/ethernet/emulex/benet/
+
+EMULEX ONECONNECT ROCE DRIVER
+M: Selvin Xavier <selvin.xavier@broadcom.com>
+L: linux-rdma@vger.kernel.org
+S: Odd Fixes
+W: http://www.broadcom.com
+F: drivers/infiniband/hw/ocrdma/
+F: include/uapi/rdma/ocrdma-abi.h
+
+EMULEX/BROADCOM LPFC FC/FCOE SCSI DRIVER
+M: James Smart <james.smart@broadcom.com>
+M: Dick Kennedy <dick.kennedy@broadcom.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.broadcom.com
+F: drivers/scsi/lpfc/
+
+EMULEX/BROADCOM EFCT FC/FCOE SCSI TARGET DRIVER
+M: James Smart <james.smart@broadcom.com>
+M: Ram Vegesna <ram.vegesna@broadcom.com>
+L: linux-scsi@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+W: http://www.broadcom.com
+F: drivers/scsi/elx/
+
+ENE CB710 FLASH CARD READER DRIVER
+M: Michał Mirosław <mirq-linux@rere.qmqm.pl>
+S: Maintained
+F: drivers/misc/cb710/
+F: drivers/mmc/host/cb710-mmc.*
+F: include/linux/cb710.h
+
+ENE KB2426 (ENE0100/ENE020XX) INFRARED RECEIVER
+M: Maxim Levitsky <maximlevitsky@gmail.com>
+S: Maintained
+F: drivers/media/rc/ene_ir.*
+
+EPAPR HYPERVISOR BYTE CHANNEL DEVICE DRIVER
+M: Laurentiu Tudor <laurentiu.tudor@nxp.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/tty/ehv_bytechan.c
+
+EPSON S1D13XXX FRAMEBUFFER DRIVER
+M: Kristoffer Ericson <kristoffer.ericson@gmail.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kristoffer/linux-hpc.git
+F: drivers/video/fbdev/s1d13xxxfb.c
+F: include/video/s1d13xxxfb.h
+
+EROFS FILE SYSTEM
+M: Gao Xiang <xiang@kernel.org>
+M: Chao Yu <chao@kernel.org>
+L: linux-erofs@lists.ozlabs.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
+F: Documentation/filesystems/erofs.rst
+F: fs/erofs/
+F: include/trace/events/erofs.h
+
+ERRSEQ ERROR TRACKING INFRASTRUCTURE
+M: Jeff Layton <jlayton@kernel.org>
+S: Maintained
+F: include/linux/errseq.h
+F: lib/errseq.c
+
+ET131X NETWORK DRIVER
+M: Mark Einon <mark.einon@gmail.com>
+S: Odd Fixes
+F: drivers/net/ethernet/agere/
+
+ETAS ES58X CAN/USB DRIVER
+M: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
+L: linux-can@vger.kernel.org
+S: Maintained
+F: drivers/net/can/usb/etas_es58x/
+
+ETHERNET BRIDGE
+M: Roopa Prabhu <roopa@nvidia.com>
+M: Nikolay Aleksandrov <nikolay@nvidia.com>
+L: bridge@lists.linux-foundation.org (moderated for non-subscribers)
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.linuxfoundation.org/en/Net:Bridge
+F: include/linux/netfilter_bridge/
+F: net/bridge/
+
+ETHERNET PHY LIBRARY
+M: Andrew Lunn <andrew@lunn.ch>
+M: Heiner Kallweit <hkallweit1@gmail.com>
+R: Russell King <linux@armlinux.org.uk>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-net-phydev
+F: Documentation/devicetree/bindings/net/ethernet-phy.yaml
+F: Documentation/devicetree/bindings/net/mdio*
+F: Documentation/devicetree/bindings/net/qca,ar803x.yaml
+F: Documentation/networking/phy.rst
+F: drivers/net/mdio/
+F: drivers/net/mdio/acpi_mdio.c
+F: drivers/net/mdio/fwnode_mdio.c
+F: drivers/net/mdio/of_mdio.c
+F: drivers/net/pcs/
+F: drivers/net/phy/
+F: drivers/of/of_net.c
+F: include/dt-bindings/net/qca-ar803x.h
+F: include/linux/*mdio*.h
+F: include/linux/mdio/*.h
+F: include/linux/of_net.h
+F: include/linux/phy.h
+F: include/linux/phy_fixed.h
+F: include/linux/platform_data/mdio-bcm-unimac.h
+F: include/linux/platform_data/mdio-gpio.h
+F: include/trace/events/mdio.h
+F: include/uapi/linux/mdio.h
+F: include/uapi/linux/mii.h
+
+EXFAT FILE SYSTEM
+M: Namjae Jeon <linkinjeon@kernel.org>
+M: Sungjong Seo <sj1557.seo@samsung.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/exfat/
+
+EXT2 FILE SYSTEM
+M: Jan Kara <jack@suse.com>
+L: linux-ext4@vger.kernel.org
+S: Maintained
+F: Documentation/filesystems/ext2.rst
+F: fs/ext2/
+F: include/linux/ext2*
+
+EXT4 FILE SYSTEM
+M: "Theodore Ts'o" <tytso@mit.edu>
+M: Andreas Dilger <adilger.kernel@dilger.ca>
+L: linux-ext4@vger.kernel.org
+S: Maintained
+W: http://ext4.wiki.kernel.org
+Q: http://patchwork.ozlabs.org/project/linux-ext4/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
+F: Documentation/filesystems/ext4/
+F: fs/ext4/
+F: include/trace/events/ext4.h
+
+Extended Verification Module (EVM)
+M: Mimi Zohar <zohar@linux.ibm.com>
+L: linux-integrity@vger.kernel.org
+S: Supported
+F: security/integrity/evm/
+
+EXTENSIBLE FIRMWARE INTERFACE (EFI)
+M: Ard Biesheuvel <ardb@kernel.org>
+L: linux-efi@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
+F: Documentation/admin-guide/efi-stub.rst
+F: arch/*/include/asm/efi.h
+F: arch/*/kernel/efi.c
+F: arch/arm/boot/compressed/efi-header.S
+F: arch/arm64/kernel/efi-entry.S
+F: arch/x86/platform/efi/
+F: drivers/firmware/efi/
+F: include/linux/efi*.h
+
+EXTERNAL CONNECTOR SUBSYSTEM (EXTCON)
+M: MyungJoo Ham <myungjoo.ham@samsung.com>
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon.git
+F: Documentation/devicetree/bindings/extcon/
+F: Documentation/firmware-guide/acpi/extcon-intel-int3496.rst
+F: drivers/extcon/
+F: include/linux/extcon.h
+F: include/linux/extcon/
+
+EXTRA BOOT CONFIG
+M: Masami Hiramatsu <mhiramat@kernel.org>
+S: Maintained
+F: Documentation/admin-guide/bootconfig.rst
+F: fs/proc/bootconfig.c
+F: include/linux/bootconfig.h
+F: lib/bootconfig.c
+F: tools/bootconfig/*
+F: tools/bootconfig/scripts/*
+
+EXYNOS DP DRIVER
+M: Jingoo Han <jingoohan1@gmail.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: drivers/gpu/drm/exynos/exynos_dp*
+
+EXYNOS SYSMMU (IOMMU) driver
+M: Marek Szyprowski <m.szyprowski@samsung.com>
+L: iommu@lists.linux-foundation.org
+S: Maintained
+F: drivers/iommu/exynos-iommu.c
+
+F2FS FILE SYSTEM
+M: Jaegeuk Kim <jaegeuk@kernel.org>
+M: Chao Yu <chao@kernel.org>
+L: linux-f2fs-devel@lists.sourceforge.net
+S: Maintained
+W: https://f2fs.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git
+F: Documentation/ABI/testing/sysfs-fs-f2fs
+F: Documentation/filesystems/f2fs.rst
+F: fs/f2fs/
+F: include/linux/f2fs_fs.h
+F: include/trace/events/f2fs.h
+F: include/uapi/linux/f2fs.h
+
+F71805F HARDWARE MONITORING DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/f71805f.rst
+F: drivers/hwmon/f71805f.c
+
+FADDR2LINE
+M: Josh Poimboeuf <jpoimboe@redhat.com>
+S: Maintained
+F: scripts/faddr2line
+
+FAILOVER MODULE
+M: Sridhar Samudrala <sridhar.samudrala@intel.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/failover.rst
+F: include/net/failover.h
+F: net/core/failover.c
+
+FANOTIFY
+M: Jan Kara <jack@suse.cz>
+R: Amir Goldstein <amir73il@gmail.com>
+R: Matthew Bobrowski <repnop@google.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/notify/fanotify/
+F: include/linux/fanotify.h
+F: include/uapi/linux/fanotify.h
+
+FARSYNC SYNCHRONOUS DRIVER
+M: Kevin Curtis <kevin.curtis@farsite.co.uk>
+S: Supported
+W: http://www.farsite.co.uk/
+F: drivers/net/wan/farsync.*
+
+FAULT INJECTION SUPPORT
+M: Akinobu Mita <akinobu.mita@gmail.com>
+S: Supported
+F: Documentation/fault-injection/
+F: lib/fault-inject.c
+
+FBTFT Framebuffer drivers
+L: dri-devel@lists.freedesktop.org
+L: linux-fbdev@vger.kernel.org
+S: Orphan
+F: drivers/staging/fbtft/
+
+FC0011 TUNER DRIVER
+M: Michael Buesch <m@bues.ch>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/tuners/fc0011.c
+F: drivers/media/tuners/fc0011.h
+
+FC2580 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/fc2580*
+
+FCOE SUBSYSTEM (libfc, libfcoe, fcoe)
+M: Hannes Reinecke <hare@suse.de>
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: www.Open-FCoE.org
+F: drivers/scsi/fcoe/
+F: drivers/scsi/libfc/
+F: include/scsi/fc/
+F: include/scsi/libfc.h
+F: include/scsi/libfcoe.h
+F: include/uapi/scsi/fc/
+
+FILE LOCKING (flock() and fcntl()/lockf())
+M: Jeff Layton <jlayton@kernel.org>
+M: "J. Bruce Fields" <bfields@fieldses.org>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/fcntl.c
+F: fs/locks.c
+F: include/linux/fcntl.h
+F: include/uapi/linux/fcntl.h
+
+FILESYSTEM DIRECT ACCESS (DAX)
+M: Dan Williams <dan.j.williams@intel.com>
+R: Matthew Wilcox <willy@infradead.org>
+R: Jan Kara <jack@suse.cz>
+L: linux-fsdevel@vger.kernel.org
+L: nvdimm@lists.linux.dev
+S: Supported
+F: fs/dax.c
+F: include/linux/dax.h
+F: include/trace/events/fs_dax.h
+
+FILESYSTEMS (VFS and infrastructure)
+M: Alexander Viro <viro@zeniv.linux.org.uk>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/*
+F: include/linux/fs.h
+F: include/linux/fs_types.h
+F: include/uapi/linux/fs.h
+F: include/uapi/linux/openat2.h
+X: fs/io-wq.c
+X: fs/io-wq.h
+X: fs/io_uring.c
+
+FINTEK F75375S HARDWARE MONITOR AND FAN CONTROLLER DRIVER
+M: Riku Voipio <riku.voipio@iki.fi>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/f75375s.c
+F: include/linux/f75375s.h
+
+FIREWIRE AUDIO DRIVERS and IEC 61883-1/6 PACKET STREAMING ENGINE
+M: Clemens Ladisch <clemens@ladisch.de>
+M: Takashi Sakamoto <o-takashi@sakamocchi.jp>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: include/uapi/sound/firewire.h
+F: sound/firewire/
+
+FIREWIRE MEDIA DRIVERS (firedtv)
+M: Stefan Richter <stefanr@s5r6.in-berlin.de>
+L: linux-media@vger.kernel.org
+L: linux1394-devel@lists.sourceforge.net
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git
+F: drivers/media/firewire/
+
+FIREWIRE SBP-2 TARGET
+M: Chris Boot <bootc@bootc.net>
+L: linux-scsi@vger.kernel.org
+L: target-devel@vger.kernel.org
+L: linux1394-devel@lists.sourceforge.net
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core-2.6.git master
+F: drivers/target/sbp/
+
+FIREWIRE SUBSYSTEM
+M: Stefan Richter <stefanr@s5r6.in-berlin.de>
+L: linux1394-devel@lists.sourceforge.net
+S: Maintained
+W: http://ieee1394.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394.git
+F: drivers/firewire/
+F: include/linux/firewire.h
+F: include/uapi/linux/firewire*.h
+F: tools/firewire/
+
+FIRMWARE FRAMEWORK FOR ARMV8-A
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/firmware/arm_ffa/
+F: include/linux/arm_ffa.h
+
+FIRMWARE LOADER (request_firmware)
+M: Luis Chamberlain <mcgrof@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/firmware_class/
+F: drivers/base/firmware_loader/
+F: include/linux/firmware.h
+
+FLASH ADAPTER DRIVER (IBM Flash Adapter 900GB Full Height PCI Flash Card)
+M: Joshua Morris <josh.h.morris@us.ibm.com>
+M: Philip Kelleher <pjk1939@linux.ibm.com>
+S: Maintained
+F: drivers/block/rsxx/
+
+FLEXTIMER FTM-QUADDEC DRIVER
+M: Patrick Havelange <patrick.havelange@essensium.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/counter/ftm-quaddec.txt
+F: drivers/counter/ftm-quaddec.c
+
+FLOPPY DRIVER
+M: Denis Efremov <efremov@linux.com>
+L: linux-block@vger.kernel.org
+S: Odd Fixes
+F: drivers/block/floppy.c
+
+FLYSKY FSIA6B RC RECEIVER
+M: Markus Koch <markus@notsyncing.net>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/joystick/fsia6b.c
+
+FOCUSRITE SCARLETT GEN 2/3 MIXER DRIVER
+M: Geoffrey D. Bennett <g@b4.vu>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: sound/usb/mixer_scarlett_gen2.c
+
+FORCEDETH GIGABIT ETHERNET DRIVER
+M: Rain River <rain.1986.08.12@gmail.com>
+M: Zhu Yanjun <zyjzyj2000@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/nvidia/*
+
+FPGA DFL DRIVERS
+M: Wu Hao <hao.wu@intel.com>
+R: Tom Rix <trix@redhat.com>
+L: linux-fpga@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-dfl*
+F: Documentation/fpga/dfl.rst
+F: drivers/fpga/dfl*
+F: drivers/uio/uio_dfl.c
+F: include/linux/dfl.h
+F: include/uapi/linux/fpga-dfl.h
+
+FPGA MANAGER FRAMEWORK
+M: Moritz Fischer <mdf@kernel.org>
+M: Wu Hao <hao.wu@intel.com>
+M: Xu Yilun <yilun.xu@intel.com>
+R: Tom Rix <trix@redhat.com>
+L: linux-fpga@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-fpga/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga.git
+F: Documentation/devicetree/bindings/fpga/
+F: Documentation/driver-api/fpga/
+F: Documentation/fpga/
+F: drivers/fpga/
+F: include/linux/fpga/
+
+FPU EMULATOR
+M: Bill Metzenthen <billm@melbpc.org.au>
+S: Maintained
+W: http://floatingpoint.sourceforge.net/emulator/index.html
+F: arch/x86/math-emu/
+
+FRAMEBUFFER LAYER
+L: dri-devel@lists.freedesktop.org
+L: linux-fbdev@vger.kernel.org
+S: Orphan
+Q: http://patchwork.kernel.org/project/linux-fbdev/list/
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/fb/
+F: drivers/video/
+F: include/linux/fb.h
+F: include/uapi/linux/fb.h
+F: include/uapi/video/
+F: include/video/
+
+FREESCALE CAAM (Cryptographic Acceleration and Assurance Module) DRIVER
+M: Horia Geantă <horia.geanta@nxp.com>
+M: Pankaj Gupta <pankaj.gupta@nxp.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/crypto/fsl-sec4.txt
+F: drivers/crypto/caam/
+
+FREESCALE COLDFIRE M5441X MMC DRIVER
+M: Angelo Dureghello <angelo.dureghello@timesys.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci-esdhc-mcf.c
+F: include/linux/platform_data/mmc-esdhc-mcf.h
+
+FREESCALE DIU FRAMEBUFFER DRIVER
+M: Timur Tabi <timur@kernel.org>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/fsl-diu-fb.*
+
+FREESCALE DMA DRIVER
+M: Li Yang <leoyang.li@nxp.com>
+M: Zhang Wei <zw@zh-kernel.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/dma/fsldma.*
+
+FREESCALE DSPI DRIVER
+M: Vladimir Oltean <olteanv@gmail.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
+F: drivers/spi/spi-fsl-dspi.c
+F: include/linux/spi/spi-fsl-dspi.h
+
+FREESCALE ENETC ETHERNET DRIVERS
+M: Claudiu Manoil <claudiu.manoil@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/freescale/enetc/
+
+FREESCALE eTSEC ETHERNET DRIVER (GIANFAR)
+M: Claudiu Manoil <claudiu.manoil@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
+F: drivers/net/ethernet/freescale/gianfar*
+
+FREESCALE GPMI NAND DRIVER
+M: Han Xu <han.xu@nxp.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/nand/raw/gpmi-nand/*
+
+FREESCALE I2C CPM DRIVER
+M: Jochen Friedrich <jochen@scram.de>
+L: linuxppc-dev@lists.ozlabs.org
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-cpm.c
+
+FREESCALE IMX / MXC FEC DRIVER
+M: Joakim Zhang <qiangqing.zhang@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/fsl,fec.yaml
+F: drivers/net/ethernet/freescale/fec.h
+F: drivers/net/ethernet/freescale/fec_main.c
+F: drivers/net/ethernet/freescale/fec_ptp.c
+
+FREESCALE IMX / MXC FRAMEBUFFER DRIVER
+M: Sascha Hauer <s.hauer@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+L: linux-fbdev@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/video/fbdev/imxfb.c
+F: include/linux/platform_data/video-imxfb.h
+
+FREESCALE IMX DDR PMU DRIVER
+M: Frank Li <Frank.li@nxp.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/admin-guide/perf/imx-ddr.rst
+F: Documentation/devicetree/bindings/perf/fsl-imx-ddr.yaml
+F: drivers/perf/fsl_imx8_ddr_perf.c
+
+FREESCALE IMX I2C DRIVER
+M: Oleksij Rempel <o.rempel@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-imx.yaml
+F: drivers/i2c/busses/i2c-imx.c
+
+FREESCALE IMX LPI2C DRIVER
+M: Dong Aisheng <aisheng.dong@nxp.com>
+L: linux-i2c@vger.kernel.org
+L: linux-imx@nxp.com
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-imx-lpi2c.yaml
+F: drivers/i2c/busses/i2c-imx-lpi2c.c
+
+FREESCALE MPC I2C DRIVER
+M: Chris Packham <chris.packham@alliedtelesis.co.nz>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-mpc.yaml
+F: drivers/i2c/busses/i2c-mpc.c
+
+FREESCALE QORIQ DPAA ETHERNET DRIVER
+M: Madalin Bucur <madalin.bucur@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/freescale/dpaa
+
+FREESCALE QORIQ DPAA FMAN DRIVER
+M: Madalin Bucur <madalin.bucur@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/fsl-fman.txt
+F: drivers/net/ethernet/freescale/fman
+
+FREESCALE QORIQ PTP CLOCK DRIVER
+M: Yangbo Lu <yangbo.lu@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
+F: drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp*
+F: drivers/net/ethernet/freescale/dpaa2/dprtc*
+F: drivers/net/ethernet/freescale/enetc/enetc_ptp.c
+F: drivers/ptp/ptp_qoriq.c
+F: drivers/ptp/ptp_qoriq_debugfs.c
+F: include/linux/fsl/ptp_qoriq.h
+
+FREESCALE QUAD SPI DRIVER
+M: Han Xu <han.xu@nxp.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/fsl,spi-fsl-qspi.yaml
+F: drivers/spi/spi-fsl-qspi.c
+
+FREESCALE QUICC ENGINE LIBRARY
+M: Qiang Zhao <qiang.zhao@nxp.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/soc/fsl/qe/
+F: include/soc/fsl/*qe*.h
+F: include/soc/fsl/*ucc*.h
+
+FREESCALE QUICC ENGINE UCC ETHERNET DRIVER
+M: Li Yang <leoyang.li@nxp.com>
+L: netdev@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/net/ethernet/freescale/ucc_geth*
+
+FREESCALE QUICC ENGINE UCC HDLC DRIVER
+M: Zhao Qiang <qiang.zhao@nxp.com>
+L: netdev@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/net/wan/fsl_ucc_hdlc*
+
+FREESCALE QUICC ENGINE UCC UART DRIVER
+M: Timur Tabi <timur@kernel.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/tty/serial/ucc_uart.c
+
+FREESCALE SOC DRIVERS
+M: Li Yang <leoyang.li@nxp.com>
+L: linuxppc-dev@lists.ozlabs.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml
+F: Documentation/devicetree/bindings/soc/fsl/
+F: drivers/soc/fsl/
+F: include/linux/fsl/
+
+FREESCALE SOC FS_ENET DRIVER
+M: Pantelis Antoniou <pantelis.antoniou@gmail.com>
+L: linuxppc-dev@lists.ozlabs.org
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/freescale/fs_enet/
+F: include/linux/fs_enet_pd.h
+
+FREESCALE SOC SOUND DRIVERS
+M: Nicolin Chen <nicoleotsuka@gmail.com>
+M: Xiubo Li <Xiubo.Lee@gmail.com>
+R: Fabio Estevam <festevam@gmail.com>
+R: Shengjiu Wang <shengjiu.wang@gmail.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: sound/soc/fsl/fsl*
+F: sound/soc/fsl/imx*
+F: sound/soc/fsl/mpc8610_hpcd.c
+
+FREESCALE USB PERIPHERAL DRIVERS
+M: Li Yang <leoyang.li@nxp.com>
+L: linux-usb@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/usb/gadget/udc/fsl*
+
+FREESCALE USB PHY DRIVER
+M: Ran Wang <ran.wang_1@nxp.com>
+L: linux-usb@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/usb/phy/phy-fsl-usb*
+
+FREEVXFS FILESYSTEM
+M: Christoph Hellwig <hch@infradead.org>
+S: Maintained
+W: ftp://ftp.openlinux.org/pub/people/hch/vxfs
+F: fs/freevxfs/
+
+FREEZER
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Pavel Machek <pavel@ucw.cz>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: Documentation/power/freezing-of-tasks.rst
+F: include/linux/freezer.h
+F: kernel/freezer.c
+
+FRONTSWAP API
+M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: include/linux/frontswap.h
+F: mm/frontswap.c
+
+FS-CACHE: LOCAL CACHING FOR NETWORK FILESYSTEMS
+M: David Howells <dhowells@redhat.com>
+L: linux-cachefs@redhat.com (moderated for non-subscribers)
+S: Supported
+F: Documentation/filesystems/caching/
+F: fs/fscache/
+F: include/linux/fscache*.h
+
+FSCRYPT: FILE SYSTEM LEVEL ENCRYPTION SUPPORT
+M: Theodore Y. Ts'o <tytso@mit.edu>
+M: Jaegeuk Kim <jaegeuk@kernel.org>
+M: Eric Biggers <ebiggers@kernel.org>
+L: linux-fscrypt@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-fscrypt/list/
+T: git git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
+F: Documentation/filesystems/fscrypt.rst
+F: fs/crypto/
+F: include/linux/fscrypt*.h
+F: include/uapi/linux/fscrypt.h
+
+FSI SUBSYSTEM
+M: Jeremy Kerr <jk@ozlabs.org>
+M: Joel Stanley <joel@jms.id.au>
+R: Alistar Popple <alistair@popple.id.au>
+R: Eddie James <eajames@linux.ibm.com>
+L: linux-fsi@lists.ozlabs.org
+S: Supported
+Q: http://patchwork.ozlabs.org/project/linux-fsi/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joel/fsi.git
+F: drivers/fsi/
+F: include/linux/fsi*.h
+F: include/trace/events/fsi*.h
+
+FSI-ATTACHED I2C DRIVER
+M: Eddie James <eajames@linux.ibm.com>
+L: linux-i2c@vger.kernel.org
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-fsi.txt
+F: drivers/i2c/busses/i2c-fsi.c
+
+FSI-ATTACHED SPI DRIVER
+M: Eddie James <eajames@linux.ibm.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml
+F: drivers/spi/spi-fsi.c
+
+FSNOTIFY: FILESYSTEM NOTIFICATION INFRASTRUCTURE
+M: Jan Kara <jack@suse.cz>
+R: Amir Goldstein <amir73il@gmail.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify
+F: fs/notify/
+F: include/linux/fsnotify*.h
+
+FSVERITY: READ-ONLY FILE-BASED AUTHENTICITY PROTECTION
+M: Eric Biggers <ebiggers@kernel.org>
+M: Theodore Y. Ts'o <tytso@mit.edu>
+L: linux-fscrypt@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-fscrypt/list/
+T: git git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git fsverity
+F: Documentation/filesystems/fsverity.rst
+F: fs/verity/
+F: include/linux/fsverity.h
+F: include/uapi/linux/fsverity.h
+
+FT260 FTDI USB-HID TO I2C BRIDGE DRIVER
+M: Michael Zaidman <michael.zaidman@gmail.com>
+L: linux-i2c@vger.kernel.org
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-ft260.c
+
+FUJITSU LAPTOP EXTRAS
+M: Jonathan Woithe <jwoithe@just42.net>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/fujitsu-laptop.c
+
+FUJITSU M-5MO LS CAMERA ISP DRIVER
+M: Kyungmin Park <kyungmin.park@samsung.com>
+M: Heungjun Kim <riverful.kim@samsung.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/m5mols/
+F: include/media/i2c/m5mols.h
+
+FUJITSU TABLET EXTRAS
+M: Robert Gerlach <khnz@gmx.de>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/fujitsu-tablet.c
+
+FUSE: FILESYSTEM IN USERSPACE
+M: Miklos Szeredi <miklos@szeredi.hu>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+W: https://github.com/libfuse/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
+F: Documentation/filesystems/fuse.rst
+F: fs/fuse/
+F: include/uapi/linux/fuse.h
+
+FUTEX SUBSYSTEM
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Ingo Molnar <mingo@redhat.com>
+R: Peter Zijlstra <peterz@infradead.org>
+R: Darren Hart <dvhart@infradead.org>
+R: Davidlohr Bueso <dave@stgolabs.net>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
+F: Documentation/locking/*futex*
+F: include/asm-generic/futex.h
+F: include/linux/futex.h
+F: include/uapi/linux/futex.h
+F: kernel/futex.c
+F: tools/perf/bench/futex*
+F: tools/testing/selftests/futex/
+
+GATEWORKS SYSTEM CONTROLLER (GSC) DRIVER
+M: Tim Harvey <tharvey@gateworks.com>
+M: Robert Jones <rjones@gateworks.com>
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/gateworks-gsc.yaml
+F: drivers/mfd/gateworks-gsc.c
+F: include/linux/mfd/gsc.h
+F: Documentation/hwmon/gsc-hwmon.rst
+F: drivers/hwmon/gsc-hwmon.c
+F: include/linux/platform_data/gsc_hwmon.h
+
+GCC PLUGINS
+M: Kees Cook <keescook@chromium.org>
+L: linux-hardening@vger.kernel.org
+S: Maintained
+F: Documentation/kbuild/gcc-plugins.rst
+F: scripts/Makefile.gcc-plugins
+F: scripts/gcc-plugins/
+
+GCOV BASED KERNEL PROFILING
+M: Peter Oberparleiter <oberpar@linux.ibm.com>
+S: Maintained
+F: Documentation/dev-tools/gcov.rst
+F: kernel/gcov/
+
+GDB KERNEL DEBUGGING HELPER SCRIPTS
+M: Jan Kiszka <jan.kiszka@siemens.com>
+M: Kieran Bingham <kbingham@kernel.org>
+S: Supported
+F: scripts/gdb/
+
+GEMINI CRYPTO DRIVER
+M: Corentin Labbe <clabbe@baylibre.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/gemini/
+
+GEMTEK FM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-gemtek*
+
+GENERIC ARCHITECTURE TOPOLOGY
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/base/arch_topology.c
+F: include/linux/arch_topology.h
+
+GENERIC ENTRY CODE
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Peter Zijlstra <peterz@infradead.org>
+M: Andy Lutomirski <luto@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core/entry
+F: include/linux/entry-common.h
+F: include/linux/entry-kvm.h
+F: kernel/entry/
+
+GENERIC GPIO I2C DRIVER
+M: Wolfram Sang <wsa+renesas@sang-engineering.com>
+S: Supported
+F: drivers/i2c/busses/i2c-gpio.c
+F: include/linux/platform_data/i2c-gpio.h
+
+GENERIC GPIO I2C MULTIPLEXER DRIVER
+M: Peter Korsgaard <peter.korsgaard@barco.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+F: Documentation/i2c/muxes/i2c-mux-gpio.rst
+F: drivers/i2c/muxes/i2c-mux-gpio.c
+F: include/linux/platform_data/i2c-mux-gpio.h
+
+GENERIC HDLC (WAN) DRIVERS
+M: Krzysztof Halasa <khc@pm.waw.pl>
+S: Maintained
+W: http://www.kernel.org/pub/linux/utils/net/hdlc/
+F: drivers/net/wan/c101.c
+F: drivers/net/wan/hd6457*
+F: drivers/net/wan/hdlc*
+F: drivers/net/wan/n2.c
+F: drivers/net/wan/pc300too.c
+F: drivers/net/wan/pci200syn.c
+F: drivers/net/wan/wanxl*
+
+GENERIC INCLUDE/ASM HEADER FILES
+M: Arnd Bergmann <arnd@arndb.de>
+L: linux-arch@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git
+F: include/asm-generic/
+F: include/uapi/asm-generic/
+
+GENERIC PHY FRAMEWORK
+M: Kishon Vijay Abraham I <kishon@ti.com>
+M: Vinod Koul <vkoul@kernel.org>
+L: linux-phy@lists.infradead.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-phy/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git
+F: Documentation/devicetree/bindings/phy/
+F: drivers/phy/
+F: include/linux/phy/
+
+GENERIC PINCTRL I2C DEMULTIPLEXER DRIVER
+M: Wolfram Sang <wsa+renesas@sang-engineering.com>
+S: Supported
+F: drivers/i2c/muxes/i2c-demux-pinctrl.c
+
+GENERIC PM DOMAINS
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Kevin Hilman <khilman@kernel.org>
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/power/power?domain*
+F: drivers/base/power/domain*.c
+F: include/linux/pm_domain.h
+
+GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
+M: Eugen Hristev <eugen.hristev@microchip.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/resistive-adc-touch.c
+
+GENERIC STRING LIBRARY
+R: Andy Shevchenko <andy@kernel.org>
+S: Maintained
+F: lib/string.c
+F: lib/string_helpers.c
+F: lib/test_string.c
+F: lib/test-string_helpers.c
+
+GENERIC UIO DRIVER FOR PCI DEVICES
+M: "Michael S. Tsirkin" <mst@redhat.com>
+L: kvm@vger.kernel.org
+S: Supported
+F: drivers/uio/uio_pci_generic.c
+
+GENERIC VDSO LIBRARY
+M: Andy Lutomirski <luto@kernel.org>
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Vincenzo Frascino <vincenzo.frascino@arm.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso
+F: include/asm-generic/vdso/vsyscall.h
+F: include/vdso/
+F: kernel/time/vsyscall.c
+F: lib/vdso/
+
+GENWQE (IBM Generic Workqueue Card)
+M: Frank Haverkamp <haver@linux.ibm.com>
+S: Supported
+F: drivers/misc/genwqe/
+
+GET_MAINTAINER SCRIPT
+M: Joe Perches <joe@perches.com>
+S: Maintained
+F: scripts/get_maintainer.pl
+
+GFS2 FILE SYSTEM
+M: Bob Peterson <rpeterso@redhat.com>
+M: Andreas Gruenbacher <agruenba@redhat.com>
+L: cluster-devel@redhat.com
+S: Supported
+B: https://bugzilla.kernel.org/enter_bug.cgi?product=File%20System&component=gfs2
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
+F: Documentation/filesystems/gfs2*
+F: fs/gfs2/
+F: include/uapi/linux/gfs2_ondisk.h
+
+GIGABYTE WMI DRIVER
+M: Thomas Weißschuh <thomas@weissschuh.net>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/gigabyte-wmi.c
+
+GNSS SUBSYSTEM
+M: Johan Hovold <johan@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/johan/gnss.git
+F: Documentation/ABI/testing/sysfs-class-gnss
+F: Documentation/devicetree/bindings/gnss/
+F: drivers/gnss/
+F: include/linux/gnss.h
+
+GO7007 MPEG CODEC
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/usb/go7007/
+
+GOODIX TOUCHSCREEN
+M: Bastien Nocera <hadess@hadess.net>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/goodix.c
+
+GOOGLE ETHERNET DRIVERS
+M: Jeroen de Borst <jeroendb@google.com>
+R: Catherine Sullivan <csully@google.com>
+R: David Awogbemila <awogbemila@google.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/ethernet/google/gve.rst
+F: drivers/net/ethernet/google
+
+GPD POCKET FAN DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/gpd-pocket-fan.c
+
+GPIO ACPI SUPPORT
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+M: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+L: linux-gpio@vger.kernel.org
+L: linux-acpi@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
+F: Documentation/firmware-guide/acpi/gpio-properties.rst
+F: drivers/gpio/gpiolib-acpi.c
+F: drivers/gpio/gpiolib-acpi.h
+
+GPIO AGGREGATOR
+M: Geert Uytterhoeven <geert+renesas@glider.be>
+L: linux-gpio@vger.kernel.org
+S: Supported
+F: Documentation/admin-guide/gpio/gpio-aggregator.rst
+F: drivers/gpio/gpio-aggregator.c
+
+GPIO IR Transmitter
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/gpio-ir-tx.c
+
+GPIO MOCKUP DRIVER
+M: Bamvor Jian Zhang <bamv2005@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-mockup.c
+F: tools/testing/selftests/gpio/
+
+GPIO REGMAP
+R: Michael Walle <michael@walle.cc>
+S: Maintained
+F: drivers/gpio/gpio-regmap.c
+F: include/linux/gpio/regmap.h
+
+GPIO SUBSYSTEM
+M: Linus Walleij <linus.walleij@linaro.org>
+M: Bartosz Golaszewski <brgl@bgdev.pl>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git
+F: Documentation/ABI/obsolete/sysfs-gpio
+F: Documentation/ABI/testing/gpio-cdev
+F: Documentation/admin-guide/gpio/
+F: Documentation/devicetree/bindings/gpio/
+F: Documentation/driver-api/gpio/
+F: drivers/gpio/
+F: include/asm-generic/gpio.h
+F: include/linux/gpio.h
+F: include/linux/gpio/
+F: include/linux/of_gpio.h
+F: include/uapi/linux/gpio.h
+F: tools/gpio/
+
+GRE DEMULTIPLEXER DRIVER
+M: Dmitry Kozlov <xeb@mail.ru>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/net/gre.h
+F: net/ipv4/gre_demux.c
+F: net/ipv4/gre_offload.c
+
+GRETH 10/100/1G Ethernet MAC device driver
+M: Andreas Larsson <andreas@gaisler.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/aeroflex/
+
+GREYBUS AUDIO PROTOCOLS DRIVERS
+M: Vaibhav Agarwal <vaibhav.sr@gmail.com>
+M: Mark Greer <mgreer@animalcreek.com>
+S: Maintained
+F: drivers/staging/greybus/audio_apbridgea.c
+F: drivers/staging/greybus/audio_apbridgea.h
+F: drivers/staging/greybus/audio_codec.c
+F: drivers/staging/greybus/audio_codec.h
+F: drivers/staging/greybus/audio_gb.c
+F: drivers/staging/greybus/audio_manager.c
+F: drivers/staging/greybus/audio_manager.h
+F: drivers/staging/greybus/audio_manager_module.c
+F: drivers/staging/greybus/audio_manager_private.h
+F: drivers/staging/greybus/audio_manager_sysfs.c
+F: drivers/staging/greybus/audio_module.c
+F: drivers/staging/greybus/audio_topology.c
+
+GREYBUS FW/HID/SPI PROTOCOLS DRIVERS
+M: Viresh Kumar <vireshk@kernel.org>
+S: Maintained
+F: drivers/staging/greybus/authentication.c
+F: drivers/staging/greybus/bootrom.c
+F: drivers/staging/greybus/firmware.h
+F: drivers/staging/greybus/fw-core.c
+F: drivers/staging/greybus/fw-download.c
+F: drivers/staging/greybus/fw-management.c
+F: drivers/staging/greybus/greybus_authentication.h
+F: drivers/staging/greybus/greybus_firmware.h
+F: drivers/staging/greybus/hid.c
+F: drivers/staging/greybus/i2c.c
+F: drivers/staging/greybus/spi.c
+F: drivers/staging/greybus/spilib.c
+F: drivers/staging/greybus/spilib.h
+
+GREYBUS LOOPBACK DRIVER
+M: Bryan O'Donoghue <pure.logic@nexus-software.ie>
+S: Maintained
+F: drivers/staging/greybus/loopback.c
+
+GREYBUS PLATFORM DRIVERS
+M: Vaibhav Hiremath <hvaibhav.linux@gmail.com>
+S: Maintained
+F: drivers/staging/greybus/arche-apb-ctrl.c
+F: drivers/staging/greybus/arche-platform.c
+F: drivers/staging/greybus/arche_platform.h
+
+GREYBUS SDIO/GPIO/SPI PROTOCOLS DRIVERS
+M: Rui Miguel Silva <rmfrfs@gmail.com>
+S: Maintained
+F: drivers/staging/greybus/gpio.c
+F: drivers/staging/greybus/light.c
+F: drivers/staging/greybus/power_supply.c
+F: drivers/staging/greybus/sdio.c
+F: drivers/staging/greybus/spi.c
+F: drivers/staging/greybus/spilib.c
+
+GREYBUS SUBSYSTEM
+M: Johan Hovold <johan@kernel.org>
+M: Alex Elder <elder@kernel.org>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: greybus-dev@lists.linaro.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/greybus/
+F: drivers/staging/greybus/
+F: include/linux/greybus.h
+F: include/linux/greybus/
+
+GREYBUS UART PROTOCOLS DRIVERS
+M: David Lin <dtwlin@gmail.com>
+S: Maintained
+F: drivers/staging/greybus/log.c
+F: drivers/staging/greybus/uart.c
+
+GS1662 VIDEO SERIALIZER
+M: Charles-Antoine Couret <charles-antoine.couret@nexvision.fr>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/spi/gs1662.c
+
+GSPCA FINEPIX SUBDRIVER
+M: Frank Zago <frank@zago.net>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/finepix.c
+
+GSPCA GL860 SUBDRIVER
+M: Olivier Lorin <o.lorin@laposte.net>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/gl860/
+
+GSPCA M5602 SUBDRIVER
+M: Erik Andren <erik.andren@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/m5602/
+
+GSPCA PAC207 SONIXB SUBDRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/pac207.c
+
+GSPCA SN9C20X SUBDRIVER
+M: Brian Johnson <brijohn@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/sn9c20x.c
+
+GSPCA T613 SUBDRIVER
+M: Leandro Costantino <lcostantino@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/t613.c
+
+GSPCA USB WEBCAM DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/gspca/
+
+GTP (GPRS Tunneling Protocol)
+M: Pablo Neira Ayuso <pablo@netfilter.org>
+M: Harald Welte <laforge@gnumonks.org>
+L: osmocom-net-gprs@lists.osmocom.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git
+F: drivers/net/gtp.c
+
+GUID PARTITION TABLE (GPT)
+M: Davidlohr Bueso <dave@stgolabs.net>
+L: linux-efi@vger.kernel.org
+S: Maintained
+F: block/partitions/efi.*
+
+H8/300 ARCHITECTURE
+M: Yoshinori Sato <ysato@users.sourceforge.jp>
+L: uclinux-h8-devel@lists.sourceforge.jp (moderated for non-subscribers)
+S: Maintained
+W: http://uclinux-h8.sourceforge.jp
+T: git git://git.sourceforge.jp/gitroot/uclinux-h8/linux.git
+F: arch/h8300/
+F: drivers/clk/h8300/
+F: drivers/clocksource/h8300_*.c
+F: drivers/irqchip/irq-renesas-h8*.c
+
+HABANALABS PCI DRIVER
+M: Oded Gabbay <ogabbay@kernel.org>
+S: Supported
+T: git https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/linux.git
+F: Documentation/ABI/testing/debugfs-driver-habanalabs
+F: Documentation/ABI/testing/sysfs-driver-habanalabs
+F: drivers/misc/habanalabs/
+F: include/uapi/misc/habanalabs.h
+
+HACKRF MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/hackrf/
+
+HANTRO VPU CODEC DRIVER
+M: Ezequiel Garcia <ezequiel@collabora.com>
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: linux-media@vger.kernel.org
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
+F: Documentation/devicetree/bindings/media/rockchip-vpu.yaml
+F: drivers/staging/media/hantro/
+
+HARD DRIVE ACTIVE PROTECTION SYSTEM (HDAPS) DRIVER
+M: Frank Seidel <frank@f-seidel.de>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://www.kernel.org/pub/linux/kernel/people/fseidel/hdaps/
+F: drivers/platform/x86/hdaps.c
+
+HARDWARE MONITORING
+M: Jean Delvare <jdelvare@suse.com>
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+W: http://hwmon.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git
+F: Documentation/devicetree/bindings/hwmon/
+F: Documentation/hwmon/
+F: drivers/hwmon/
+F: include/linux/hwmon*.h
+F: include/trace/events/hwmon*.h
+K: (devm_)?hwmon_device_(un)?register(|_with_groups|_with_info)
+
+HARDWARE RANDOM NUMBER GENERATOR CORE
+M: Matt Mackall <mpm@selenic.com>
+M: Herbert Xu <herbert@gondor.apana.org.au>
+L: linux-crypto@vger.kernel.org
+S: Odd fixes
+F: Documentation/admin-guide/hw_random.rst
+F: Documentation/devicetree/bindings/rng/
+F: drivers/char/hw_random/
+F: include/linux/hw_random.h
+
+HARDWARE SPINLOCK CORE
+M: Ohad Ben-Cohen <ohad@wizery.com>
+M: Bjorn Andersson <bjorn.andersson@linaro.org>
+R: Baolin Wang <baolin.wang7@gmail.com>
+L: linux-remoteproc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git hwspinlock-next
+F: Documentation/devicetree/bindings/hwlock/
+F: Documentation/locking/hwspinlock.rst
+F: drivers/hwspinlock/
+F: include/linux/hwspinlock.h
+
+HARDWARE TRACING FACILITIES
+M: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+S: Maintained
+F: drivers/hwtracing/
+
+HARMONY SOUND DRIVER
+L: linux-parisc@vger.kernel.org
+S: Maintained
+F: sound/parisc/harmony.*
+
+HDPVR USB VIDEO ENCODER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/hdpvr/
+
+HEWLETT PACKARD ENTERPRISE ILO CHIF DRIVER
+M: Matt Hsiao <matt.hsiao@hpe.com>
+S: Supported
+F: drivers/misc/hpilo.[ch]
+
+HEWLETT PACKARD ENTERPRISE ILO NMI WATCHDOG DRIVER
+M: Jerry Hoemann <jerry.hoemann@hpe.com>
+S: Supported
+F: Documentation/watchdog/hpwdt.rst
+F: drivers/watchdog/hpwdt.c
+
+HEWLETT-PACKARD SMART ARRAY RAID DRIVER (hpsa)
+M: Don Brace <don.brace@microchip.com>
+L: storagedev@microchip.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: Documentation/scsi/hpsa.rst
+F: drivers/scsi/hpsa*.[ch]
+F: include/linux/cciss*.h
+F: include/uapi/linux/cciss*.h
+
+HFI1 DRIVER
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/hw/hfi1
+
+HFS FILESYSTEM
+L: linux-fsdevel@vger.kernel.org
+S: Orphan
+F: Documentation/filesystems/hfs.rst
+F: fs/hfs/
+
+HFSPLUS FILESYSTEM
+L: linux-fsdevel@vger.kernel.org
+S: Orphan
+F: Documentation/filesystems/hfsplus.rst
+F: fs/hfsplus/
+
+HGA FRAMEBUFFER DRIVER
+M: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
+L: linux-nvidia@lists.surfsouth.com
+S: Maintained
+W: http://drama.obuda.kando.hu/~fero/cgi-bin/hgafb.shtml
+F: drivers/video/fbdev/hgafb.c
+
+HIBERNATION (aka Software Suspend, aka swsusp)
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Pavel Machek <pavel@ucw.cz>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+F: arch/*/include/asm/suspend*.h
+F: arch/x86/power/
+F: drivers/base/power/
+F: include/linux/freezer.h
+F: include/linux/pm.h
+F: include/linux/suspend.h
+F: kernel/power/
+
+HID CORE LAYER
+M: Jiri Kosina <jikos@kernel.org>
+M: Benjamin Tissoires <benjamin.tissoires@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git
+F: drivers/hid/
+F: include/linux/hid*
+F: include/uapi/linux/hid*
+
+HID PLAYSTATION DRIVER
+M: Roderick Colenbrander <roderick.colenbrander@sony.com>
+L: linux-input@vger.kernel.org
+S: Supported
+F: drivers/hid/hid-playstation.c
+
+HID SENSOR HUB DRIVERS
+M: Jiri Kosina <jikos@kernel.org>
+M: Jonathan Cameron <jic23@kernel.org>
+M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
+L: linux-input@vger.kernel.org
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/hid/hid-sensor*
+F: drivers/hid/hid-sensor-*
+F: drivers/iio/*/hid-*
+F: include/linux/hid-sensor-*
+
+HIGH-RESOLUTION TIMERS, CLOCKEVENTS
+M: Thomas Gleixner <tglx@linutronix.de>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
+F: Documentation/timers/
+F: include/linux/clockchips.h
+F: include/linux/hrtimer.h
+F: kernel/time/clockevents.c
+F: kernel/time/hrtimer.c
+F: kernel/time/timer_*.c
+
+HIGH-SPEED SCC DRIVER FOR AX.25
+L: linux-hams@vger.kernel.org
+S: Orphan
+F: drivers/net/hamradio/dmascc.c
+F: drivers/net/hamradio/scc.c
+
+HIGHPOINT ROCKETRAID 3xxx RAID DRIVER
+M: HighPoint Linux Team <linux@highpoint-tech.com>
+S: Supported
+W: http://www.highpoint-tech.com
+F: Documentation/scsi/hptiop.rst
+F: drivers/scsi/hptiop.c
+
+HIPPI
+M: Jes Sorensen <jes@trained-monkey.org>
+L: linux-hippi@sunsite.dk
+S: Maintained
+F: drivers/net/hippi/
+F: include/linux/hippidevice.h
+F: include/uapi/linux/if_hippi.h
+F: net/802/hippi.c
+
+HIRSCHMANN HELLCREEK ETHERNET SWITCH DRIVER
+M: Kurt Kanzenbach <kurt@linutronix.de>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
+F: drivers/net/dsa/hirschmann/*
+F: include/linux/platform_data/hirschmann-hellcreek.h
+F: net/dsa/tag_hellcreek.c
+
+HISILICON DMA DRIVER
+M: Zhou Wang <wangzhou1@hisilicon.com>
+L: dmaengine@vger.kernel.org
+S: Maintained
+F: drivers/dma/hisi_dma.c
+
+HISILICON GPIO DRIVER
+M: Luo Jiaxing <luojiaxing@huawei.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-hisi.c
+
+HISILICON HIGH PERFORMANCE RSA ENGINE DRIVER (HPRE)
+M: Zaibo Xu <xuzaibo@huawei.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/debugfs-hisi-hpre
+F: drivers/crypto/hisilicon/hpre/hpre.h
+F: drivers/crypto/hisilicon/hpre/hpre_crypto.c
+F: drivers/crypto/hisilicon/hpre/hpre_main.c
+
+HISILICON I2C CONTROLLER DRIVER
+M: Yicong Yang <yangyicong@hisilicon.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+W: https://www.hisilicon.com
+F: drivers/i2c/busses/i2c-hisi.c
+
+HISILICON LPC BUS DRIVER
+M: john.garry@huawei.com
+S: Maintained
+W: http://www.hisilicon.com
+F: Documentation/devicetree/bindings/arm/hisilicon/low-pin-count.yaml
+F: drivers/bus/hisi_lpc.c
+
+HISILICON NETWORK SUBSYSTEM 3 DRIVER (HNS3)
+M: Yisen Zhuang <yisen.zhuang@huawei.com>
+M: Salil Mehta <salil.mehta@huawei.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.hisilicon.com
+F: drivers/net/ethernet/hisilicon/hns3/
+
+HISILICON NETWORK SUBSYSTEM DRIVER
+M: Yisen Zhuang <yisen.zhuang@huawei.com>
+M: Salil Mehta <salil.mehta@huawei.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.hisilicon.com
+F: Documentation/devicetree/bindings/net/hisilicon*.txt
+F: drivers/net/ethernet/hisilicon/
+
+HIKEY960 ONBOARD USB GPIO HUB DRIVER
+M: John Stultz <john.stultz@linaro.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/misc/hisi_hikey_usb.c
+F: Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml
+
+HISILICON PMU DRIVER
+M: Shaokun Zhang <zhangshaokun@hisilicon.com>
+S: Supported
+W: http://www.hisilicon.com
+F: Documentation/admin-guide/perf/hisi-pmu.rst
+F: drivers/perf/hisilicon
+
+HISILICON QM AND ZIP Controller DRIVER
+M: Zhou Wang <wangzhou1@hisilicon.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/debugfs-hisi-zip
+F: drivers/crypto/hisilicon/qm.c
+F: drivers/crypto/hisilicon/qm.h
+F: drivers/crypto/hisilicon/sgl.c
+F: drivers/crypto/hisilicon/zip/
+
+HISILICON ROCE DRIVER
+M: Wenpeng Liang <liangwenpeng@huawei.com>
+M: Weihang Li <liweihang@huawei.com>
+L: linux-rdma@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/infiniband/hisilicon-hns-roce.txt
+F: drivers/infiniband/hw/hns/
+
+HISILICON SAS Controller
+M: John Garry <john.garry@huawei.com>
+S: Supported
+W: http://www.hisilicon.com
+F: Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
+F: drivers/scsi/hisi_sas/
+
+HISILICON SECURITY ENGINE V2 DRIVER (SEC2)
+M: Zaibo Xu <xuzaibo@huawei.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/debugfs-hisi-sec
+F: drivers/crypto/hisilicon/sec2/sec.h
+F: drivers/crypto/hisilicon/sec2/sec_crypto.c
+F: drivers/crypto/hisilicon/sec2/sec_crypto.h
+F: drivers/crypto/hisilicon/sec2/sec_main.c
+
+HISILICON SPI Controller DRIVER FOR KUNPENG SOCS
+M: Jay Fang <f.fangjian@huawei.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+W: http://www.hisilicon.com
+F: drivers/spi/spi-hisi-kunpeng.c
+
+HISILICON SPMI CONTROLLER DRIVER FOR HIKEY 970
+M: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spmi/hisilicon,hisi-spmi-controller.yaml
+F: drivers/spmi/hisi-spmi-controller.c
+
+HISILICON SPMI PMIC DRIVER FOR HIKEY 6421v600
+M: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/hisilicon,hi6421-spmi-pmic.yaml
+F: drivers/mfd/hi6421-spmi-pmic.c
+
+HISILICON TRUE RANDOM NUMBER GENERATOR V2 SUPPORT
+M: Zaibo Xu <xuzaibo@huawei.com>
+S: Maintained
+F: drivers/crypto/hisilicon/trng/trng.c
+
+HISILICON V3XX SPI NOR FLASH Controller Driver
+M: John Garry <john.garry@huawei.com>
+S: Maintained
+W: http://www.hisilicon.com
+F: drivers/spi/spi-hisi-sfc-v3xx.c
+
+HMM - Heterogeneous Memory Management
+M: Jérôme Glisse <jglisse@redhat.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: Documentation/vm/hmm.rst
+F: include/linux/hmm*
+F: lib/test_hmm*
+F: mm/hmm*
+F: tools/testing/selftests/vm/*hmm*
+
+HOST AP DRIVER
+M: Jouni Malinen <j@w1.fi>
+L: linux-wireless@vger.kernel.org
+S: Obsolete
+W: http://w1.fi/hostap-driver.html
+F: drivers/net/wireless/intersil/hostap/
+
+HP COMPAQ TC1100 TABLET WMI EXTRAS DRIVER
+L: platform-driver-x86@vger.kernel.org
+S: Orphan
+F: drivers/platform/x86/tc1100-wmi.c
+
+HPET: High Precision Event Timers driver
+M: Clemens Ladisch <clemens@ladisch.de>
+S: Maintained
+F: Documentation/timers/hpet.rst
+F: drivers/char/hpet.c
+F: include/linux/hpet.h
+F: include/uapi/linux/hpet.h
+
+HPET: x86
+S: Orphan
+F: arch/x86/include/asm/hpet.h
+F: arch/x86/kernel/hpet.c
+
+HPFS FILESYSTEM
+M: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
+S: Maintained
+W: http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi
+F: fs/hpfs/
+
+HSI SUBSYSTEM
+M: Sebastian Reichel <sre@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi.git
+F: Documentation/ABI/testing/sysfs-bus-hsi
+F: Documentation/driver-api/hsi.rst
+F: drivers/hsi/
+F: include/linux/hsi/
+F: include/uapi/linux/hsi/
+
+HSO 3G MODEM DRIVER
+L: linux-usb@vger.kernel.org
+S: Orphan
+F: drivers/net/usb/hso.c
+
+HSR NETWORK PROTOCOL
+L: netdev@vger.kernel.org
+S: Orphan
+F: net/hsr/
+
+HT16K33 LED CONTROLLER DRIVER
+M: Robin van der Gracht <robin@protonic.nl>
+S: Maintained
+F: Documentation/devicetree/bindings/auxdisplay/holtek,ht16k33.yaml
+F: drivers/auxdisplay/ht16k33.c
+
+HTCPEN TOUCHSCREEN DRIVER
+M: Pau Oliva Fora <pof@eslack.org>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/htcpen.c
+
+HTS221 TEMPERATURE-HUMIDITY IIO DRIVER
+M: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+W: http://www.st.com/
+F: Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml
+F: drivers/iio/humidity/hts221*
+
+HUAWEI ETHERNET DRIVER
+L: netdev@vger.kernel.org
+S: Orphan
+F: Documentation/networking/device_drivers/ethernet/huawei/hinic.rst
+F: drivers/net/ethernet/huawei/hinic/
+
+HUGETLB FILESYSTEM
+M: Mike Kravetz <mike.kravetz@oracle.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-kernel-mm-hugepages
+F: Documentation/admin-guide/mm/hugetlbpage.rst
+F: Documentation/vm/hugetlbfs_reserv.rst
+F: fs/hugetlbfs/
+F: include/linux/hugetlb.h
+F: mm/hugetlb.c
+
+HVA ST MEDIA DRIVER
+M: Jean-Christophe Trotin <jean-christophe.trotin@foss.st.com>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/platform/sti/hva
+
+HWPOISON MEMORY FAILURE HANDLING
+M: Naoya Horiguchi <naoya.horiguchi@nec.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: mm/hwpoison-inject.c
+F: mm/memory-failure.c
+
+HYCON HY46XX TOUCHSCREEN SUPPORT
+M: Giulio Benetti <giulio.benetti@benettiengineering.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/input/touchscreen/hycon,hy46xx.yaml
+F: drivers/input/touchscreen/hycon-hy46xx.c
+
+HYGON PROCESSOR SUPPORT
+M: Pu Wen <puwen@hygon.cn>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: arch/x86/kernel/cpu/hygon.c
+
+HYNIX HI556 SENSOR DRIVER
+M: Shawn Tu <shawnx.tu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/hi556.c
+
+Hyper-V/Azure CORE AND DRIVERS
+M: "K. Y. Srinivasan" <kys@microsoft.com>
+M: Haiyang Zhang <haiyangz@microsoft.com>
+M: Stephen Hemminger <sthemmin@microsoft.com>
+M: Wei Liu <wei.liu@kernel.org>
+M: Dexuan Cui <decui@microsoft.com>
+L: linux-hyperv@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
+F: Documentation/ABI/stable/sysfs-bus-vmbus
+F: Documentation/ABI/testing/debugfs-hyperv
+F: Documentation/networking/device_drivers/ethernet/microsoft/netvsc.rst
+F: arch/arm64/hyperv
+F: arch/arm64/include/asm/hyperv-tlfs.h
+F: arch/arm64/include/asm/mshyperv.h
+F: arch/x86/hyperv
+F: arch/x86/include/asm/hyperv-tlfs.h
+F: arch/x86/include/asm/mshyperv.h
+F: arch/x86/include/asm/trace/hyperv.h
+F: arch/x86/kernel/cpu/mshyperv.c
+F: drivers/clocksource/hyperv_timer.c
+F: drivers/hid/hid-hyperv.c
+F: drivers/hv/
+F: drivers/input/serio/hyperv-keyboard.c
+F: drivers/iommu/hyperv-iommu.c
+F: drivers/net/ethernet/microsoft/
+F: drivers/net/hyperv/
+F: drivers/pci/controller/pci-hyperv-intf.c
+F: drivers/pci/controller/pci-hyperv.c
+F: drivers/scsi/storvsc_drv.c
+F: drivers/uio/uio_hv_generic.c
+F: drivers/video/fbdev/hyperv_fb.c
+F: include/asm-generic/hyperv-tlfs.h
+F: include/asm-generic/mshyperv.h
+F: include/clocksource/hyperv_timer.h
+F: include/linux/hyperv.h
+F: include/uapi/linux/hyperv.h
+F: net/vmw_vsock/hyperv_transport.c
+F: tools/hv/
+
+HYPERBUS SUPPORT
+M: Vignesh Raghavendra <vigneshr@ti.com>
+L: linux-mtd@lists.infradead.org
+S: Supported
+Q: http://patchwork.ozlabs.org/project/linux-mtd/list/
+C: irc://irc.oftc.net/mtd
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git cfi/next
+F: Documentation/devicetree/bindings/mtd/cypress,hyperflash.txt
+F: Documentation/devicetree/bindings/mtd/ti,am654-hbmc.txt
+F: drivers/mtd/hyperbus/
+F: include/linux/mtd/hyperbus.h
+
+HYPERVISOR VIRTUAL CONSOLE DRIVER
+L: linuxppc-dev@lists.ozlabs.org
+S: Odd Fixes
+F: drivers/tty/hvc/
+
+I2C ACPI SUPPORT
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+L: linux-i2c@vger.kernel.org
+L: linux-acpi@vger.kernel.org
+S: Maintained
+F: drivers/i2c/i2c-core-acpi.c
+
+I2C CONTROLLER DRIVER FOR NVIDIA GPU
+M: Ajay Gupta <ajayg@nvidia.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/i2c/busses/i2c-nvidia-gpu.rst
+F: drivers/i2c/busses/i2c-nvidia-gpu.c
+
+I2C MUXES
+M: Peter Rosin <peda@axentia.se>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-arb*
+F: Documentation/devicetree/bindings/i2c/i2c-gate*
+F: Documentation/devicetree/bindings/i2c/i2c-mux*
+F: Documentation/i2c/i2c-topology.rst
+F: Documentation/i2c/muxes/
+F: drivers/i2c/i2c-mux.c
+F: drivers/i2c/muxes/
+F: include/linux/i2c-mux.h
+
+I2C MV64XXX MARVELL AND ALLWINNER DRIVER
+M: Gregory CLEMENT <gregory.clement@bootlin.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+F: drivers/i2c/busses/i2c-mv64xxx.c
+
+I2C OVER PARALLEL PORT
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/i2c/busses/i2c-parport.rst
+F: drivers/i2c/busses/i2c-parport.c
+
+I2C SUBSYSTEM
+M: Wolfram Sang <wsa@kernel.org>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+W: https://i2c.wiki.kernel.org/
+Q: https://patchwork.ozlabs.org/project/linux-i2c/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
+F: Documentation/devicetree/bindings/i2c/i2c.txt
+F: Documentation/i2c/
+F: drivers/i2c/*
+F: include/linux/i2c-dev.h
+F: include/linux/i2c-smbus.h
+F: include/linux/i2c.h
+F: include/uapi/linux/i2c-*.h
+F: include/uapi/linux/i2c.h
+
+I2C SUBSYSTEM HOST DRIVERS
+L: linux-i2c@vger.kernel.org
+S: Odd Fixes
+W: https://i2c.wiki.kernel.org/
+Q: https://patchwork.ozlabs.org/project/linux-i2c/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
+F: Documentation/devicetree/bindings/i2c/
+F: drivers/i2c/algos/
+F: drivers/i2c/busses/
+
+I2C-TAOS-EVM DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/i2c/busses/i2c-taos-evm.rst
+F: drivers/i2c/busses/i2c-taos-evm.c
+
+I2C-TINY-USB DRIVER
+M: Till Harbaum <till@harbaum.org>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+W: http://www.harbaum.org/till/i2c_tiny_usb
+F: drivers/i2c/busses/i2c-tiny-usb.c
+
+I2C/SMBUS CONTROLLER DRIVERS FOR PC
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/i2c/busses/i2c-ali1535.rst
+F: Documentation/i2c/busses/i2c-ali1563.rst
+F: Documentation/i2c/busses/i2c-ali15x3.rst
+F: Documentation/i2c/busses/i2c-amd756.rst
+F: Documentation/i2c/busses/i2c-amd8111.rst
+F: Documentation/i2c/busses/i2c-i801.rst
+F: Documentation/i2c/busses/i2c-nforce2.rst
+F: Documentation/i2c/busses/i2c-piix4.rst
+F: Documentation/i2c/busses/i2c-sis5595.rst
+F: Documentation/i2c/busses/i2c-sis630.rst
+F: Documentation/i2c/busses/i2c-sis96x.rst
+F: Documentation/i2c/busses/i2c-via.rst
+F: Documentation/i2c/busses/i2c-viapro.rst
+F: drivers/i2c/busses/i2c-ali1535.c
+F: drivers/i2c/busses/i2c-ali1563.c
+F: drivers/i2c/busses/i2c-ali15x3.c
+F: drivers/i2c/busses/i2c-amd756-s4882.c
+F: drivers/i2c/busses/i2c-amd756.c
+F: drivers/i2c/busses/i2c-amd8111.c
+F: drivers/i2c/busses/i2c-i801.c
+F: drivers/i2c/busses/i2c-isch.c
+F: drivers/i2c/busses/i2c-nforce2-s4985.c
+F: drivers/i2c/busses/i2c-nforce2.c
+F: drivers/i2c/busses/i2c-piix4.c
+F: drivers/i2c/busses/i2c-sis5595.c
+F: drivers/i2c/busses/i2c-sis630.c
+F: drivers/i2c/busses/i2c-sis96x.c
+F: drivers/i2c/busses/i2c-via.c
+F: drivers/i2c/busses/i2c-viapro.c
+
+I2C/SMBUS INTEL CHT WHISKEY COVE PMIC DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-cht-wc.c
+
+I2C/SMBUS ISMT DRIVER
+M: Seth Heasley <seth.heasley@intel.com>
+M: Neil Horman <nhorman@tuxdriver.com>
+L: linux-i2c@vger.kernel.org
+F: Documentation/i2c/busses/i2c-ismt.rst
+F: drivers/i2c/busses/i2c-ismt.c
+
+I2C/SMBUS STUB DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/i2c-stub.c
+
+I3C DRIVER FOR CADENCE I3C MASTER IP
+M: Przemysław Gaj <pgaj@cadence.com>
+S: Maintained
+F: Documentation/devicetree/bindings/i3c/cdns,i3c-master.txt
+F: drivers/i3c/master/i3c-master-cdns.c
+
+I3C DRIVER FOR SYNOPSYS DESIGNWARE
+M: Vitor Soares <vitor.soares@synopsys.com>
+S: Maintained
+F: Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.txt
+F: drivers/i3c/master/dw*
+
+I3C SUBSYSTEM
+M: Alexandre Belloni <alexandre.belloni@bootlin.com>
+L: linux-i3c@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+C: irc://chat.freenode.net/linux-i3c
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux.git
+F: Documentation/ABI/testing/sysfs-bus-i3c
+F: Documentation/devicetree/bindings/i3c/
+F: Documentation/driver-api/i3c
+F: drivers/i3c/
+F: include/linux/i3c/
+
+IA64 (Itanium) PLATFORM
+L: linux-ia64@vger.kernel.org
+S: Orphan
+F: Documentation/ia64/
+F: arch/ia64/
+
+IBM Power 842 compression accelerator
+M: Haren Myneni <haren@us.ibm.com>
+S: Supported
+F: crypto/842.c
+F: drivers/crypto/nx/Kconfig
+F: drivers/crypto/nx/Makefile
+F: drivers/crypto/nx/nx-842*
+F: include/linux/sw842.h
+F: lib/842/
+
+IBM Power in-Nest Crypto Acceleration
+M: Breno Leitão <leitao@debian.org>
+M: Nayna Jain <nayna@linux.ibm.com>
+M: Paulo Flabiano Smorigo <pfsmorigo@gmail.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+F: drivers/crypto/nx/Kconfig
+F: drivers/crypto/nx/Makefile
+F: drivers/crypto/nx/nx-aes*
+F: drivers/crypto/nx/nx-sha*
+F: drivers/crypto/nx/nx.*
+F: drivers/crypto/nx/nx_csbcpb.h
+F: drivers/crypto/nx/nx_debugfs.c
+
+IBM Power IO DLPAR Driver for RPA-compliant PPC64 platform
+M: Tyrel Datwyler <tyreld@linux.ibm.com>
+L: linux-pci@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: drivers/pci/hotplug/rpadlpar*
+
+IBM Power Linux RAID adapter
+M: Brian King <brking@us.ibm.com>
+S: Supported
+F: drivers/scsi/ipr.*
+
+IBM Power PCI Hotplug Driver for RPA-compliant PPC64 platform
+M: Tyrel Datwyler <tyreld@linux.ibm.com>
+L: linux-pci@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: drivers/pci/hotplug/rpaphp*
+
+IBM Power SRIOV Virtual NIC Device Driver
+M: Dany Madden <drt@linux.ibm.com>
+M: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
+R: Thomas Falcon <tlfalcon@linux.ibm.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/ibm/ibmvnic.*
+
+IBM Power Virtual Accelerator Switchboard
+M: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: arch/powerpc/include/asm/vas.h
+F: arch/powerpc/platforms/powernv/copy-paste.h
+F: arch/powerpc/platforms/powernv/vas*
+
+IBM Power Virtual Ethernet Device Driver
+M: Cristobal Forno <cforno12@linux.ibm.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/ibm/ibmveth.*
+
+IBM Power Virtual FC Device Drivers
+M: Tyrel Datwyler <tyreld@linux.ibm.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/ibmvscsi/ibmvfc*
+
+IBM Power Virtual Management Channel Driver
+M: Brad Warrum <bwarrum@linux.ibm.com>
+M: Ritu Agarwal <rituagar@linux.ibm.com>
+S: Supported
+F: drivers/misc/ibmvmc.*
+
+IBM Power Virtual SCSI Device Drivers
+M: Tyrel Datwyler <tyreld@linux.ibm.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/ibmvscsi/ibmvscsi*
+F: include/scsi/viosrp.h
+
+IBM Power Virtual SCSI Device Target Driver
+M: Michael Cyr <mikecyr@linux.ibm.com>
+L: linux-scsi@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+F: drivers/scsi/ibmvscsi_tgt/
+
+IBM Power VMX Cryptographic instructions
+M: Breno Leitão <leitao@debian.org>
+M: Nayna Jain <nayna@linux.ibm.com>
+M: Paulo Flabiano Smorigo <pfsmorigo@gmail.com>
+L: linux-crypto@vger.kernel.org
+S: Supported
+F: drivers/crypto/vmx/Kconfig
+F: drivers/crypto/vmx/Makefile
+F: drivers/crypto/vmx/aes*
+F: drivers/crypto/vmx/ghash*
+F: drivers/crypto/vmx/ppc-xlate.pl
+F: drivers/crypto/vmx/vmx.c
+
+IBM ServeRAID RAID DRIVER
+S: Orphan
+F: drivers/scsi/ips.*
+
+ICH LPC AND GPIO DRIVER
+M: Peter Tyser <ptyser@xes-inc.com>
+S: Maintained
+F: drivers/gpio/gpio-ich.c
+F: drivers/mfd/lpc_ich.c
+
+ICY I2C DRIVER
+M: Max Staudt <max@enpas.org>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-icy.c
+
+IDEAPAD LAPTOP EXTRAS DRIVER
+M: Ike Panhc <ike.pan@canonical.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://launchpad.net/ideapad-laptop
+F: drivers/platform/x86/ideapad-laptop.c
+
+IDEAPAD LAPTOP SLIDEBAR DRIVER
+M: Andrey Moiseev <o2g.org.ru@gmail.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+W: https://github.com/o2genum/ideapad-slidebar
+F: drivers/input/misc/ideapad_slidebar.c
+
+IDT VersaClock 5 CLOCK DRIVER
+M: Luca Ceresoli <luca@lucaceresoli.net>
+S: Maintained
+F: Documentation/devicetree/bindings/clock/idt,versaclock5.yaml
+F: drivers/clk/clk-versaclock5.c
+
+IEEE 802.15.4 SUBSYSTEM
+M: Alexander Aring <alex.aring@gmail.com>
+M: Stefan Schmidt <stefan@datenfreihafen.org>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+W: https://linux-wpan.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next.git
+F: Documentation/networking/ieee802154.rst
+F: drivers/net/ieee802154/
+F: include/linux/ieee802154.h
+F: include/linux/nl802154.h
+F: include/net/af_ieee802154.h
+F: include/net/cfg802154.h
+F: include/net/ieee802154_netdev.h
+F: include/net/mac802154.h
+F: include/net/nl802154.h
+F: net/ieee802154/
+F: net/mac802154/
+
+IFE PROTOCOL
+M: Yotam Gigi <yotam.gi@gmail.com>
+M: Jamal Hadi Salim <jhs@mojatatu.com>
+F: include/net/ife.h
+F: include/uapi/linux/ife.h
+F: net/ife
+
+IGORPLUG-USB IR RECEIVER
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/igorplugusb.c
+
+IGUANAWORKS USB IR TRANSCEIVER
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/iguanair.c
+
+IIO DIGITAL POTENTIOMETER DAC
+M: Peter Rosin <peda@axentia.se>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac
+F: Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml
+F: drivers/iio/dac/dpot-dac.c
+
+IIO ENVELOPE DETECTOR
+M: Peter Rosin <peda@axentia.se>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector
+F: Documentation/devicetree/bindings/iio/adc/envelope-detector.yaml
+F: drivers/iio/adc/envelope-detector.c
+
+IIO MULTIPLEXER
+M: Peter Rosin <peda@axentia.se>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.yaml
+F: drivers/iio/multiplexer/iio-mux.c
+
+IIO SCMI BASED DRIVER
+M: Jyoti Bhayana <jbhayana@google.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/iio/common/scmi_sensors/scmi_iio.c
+
+IIO SUBSYSTEM AND DRIVERS
+M: Jonathan Cameron <jic23@kernel.org>
+R: Lars-Peter Clausen <lars@metafoo.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
+F: Documentation/ABI/testing/configfs-iio*
+F: Documentation/ABI/testing/sysfs-bus-iio*
+F: Documentation/devicetree/bindings/iio/
+F: drivers/iio/
+F: drivers/staging/iio/
+F: include/linux/iio/
+F: tools/iio/
+
+IIO UNIT CONVERTER
+M: Peter Rosin <peda@axentia.se>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.yaml
+F: Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml
+F: Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
+F: drivers/iio/afe/iio-rescale.c
+
+IKANOS/ADI EAGLE ADSL USB DRIVER
+M: Matthieu Castet <castet.matthieu@free.fr>
+M: Stanislaw Gruszka <stf_xl@wp.pl>
+S: Maintained
+F: drivers/usb/atm/ueagle-atm.c
+
+IMGTEC ASCII LCD DRIVER
+M: Paul Burton <paulburton@kernel.org>
+S: Maintained
+F: Documentation/devicetree/bindings/auxdisplay/img,ascii-lcd.yaml
+F: drivers/auxdisplay/img-ascii-lcd.c
+
+IMGTEC IR DECODER DRIVER
+S: Orphan
+F: drivers/media/rc/img-ir/
+
+IMON SOUNDGRAPH USB IR RECEIVER
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/imon.c
+F: drivers/media/rc/imon_raw.c
+
+IMS TWINTURBO FRAMEBUFFER DRIVER
+L: linux-fbdev@vger.kernel.org
+S: Orphan
+F: drivers/video/fbdev/imsttfb.c
+
+INA209 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml
+F: Documentation/hwmon/ina209.rst
+F: drivers/hwmon/ina209.c
+
+INA2XX HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/ina2xx.rst
+F: drivers/hwmon/ina2xx.c
+F: include/linux/platform_data/ina2xx.h
+
+INDUSTRY PACK SUBSYSTEM (IPACK)
+M: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
+M: Jens Taprogge <jens.taprogge@taprogge.org>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: industrypack-devel@lists.sourceforge.net
+S: Maintained
+W: http://industrypack.sourceforge.net
+F: drivers/ipack/
+
+INFINEON DPS310 Driver
+M: Eddie James <eajames@linux.ibm.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/iio/pressure/dps310.c
+
+INFINIBAND SUBSYSTEM
+M: Doug Ledford <dledford@redhat.com>
+M: Jason Gunthorpe <jgg@nvidia.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: https://github.com/linux-rdma/rdma-core
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git
+F: Documentation/devicetree/bindings/infiniband/
+F: Documentation/infiniband/
+F: drivers/infiniband/
+F: include/rdma/
+F: include/trace/events/ib_mad.h
+F: include/trace/events/ib_umad.h
+F: include/uapi/linux/if_infiniband.h
+F: include/uapi/rdma/
+F: samples/bpf/ibumad_kern.c
+F: samples/bpf/ibumad_user.c
+
+INGENIC JZ4780 NAND DRIVER
+M: Harvey Hunt <harveyhuntnexus@gmail.com>
+L: linux-mtd@lists.infradead.org
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: drivers/mtd/nand/raw/ingenic/
+
+INGENIC JZ47xx SoCs
+M: Paul Cercueil <paul@crapouillou.net>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/boot/dts/ingenic/
+F: arch/mips/generic/board-ingenic.c
+F: arch/mips/include/asm/mach-ingenic/
+F: arch/mips/ingenic/Kconfig
+F: drivers/clk/ingenic/
+F: drivers/dma/dma-jz4780.c
+F: drivers/gpu/drm/ingenic/
+F: drivers/i2c/busses/i2c-jz4780.c
+F: drivers/iio/adc/ingenic-adc.c
+F: drivers/irqchip/irq-ingenic.c
+F: drivers/memory/jz4780-nemc.c
+F: drivers/mmc/host/jz4740_mmc.c
+F: drivers/mtd/nand/raw/ingenic/
+F: drivers/pinctrl/pinctrl-ingenic.c
+F: drivers/power/supply/ingenic-battery.c
+F: drivers/pwm/pwm-jz4740.c
+F: drivers/remoteproc/ingenic_rproc.c
+F: drivers/rtc/rtc-jz4740.c
+F: drivers/tty/serial/8250/8250_ingenic.c
+F: drivers/usb/musb/jz4740.c
+F: drivers/watchdog/jz4740_wdt.c
+F: include/dt-bindings/iio/adc/ingenic,adc.h
+F: include/linux/mfd/ingenic-tcu.h
+F: sound/soc/codecs/jz47*
+F: sound/soc/jz4740/
+
+INOTIFY
+M: Jan Kara <jack@suse.cz>
+R: Amir Goldstein <amir73il@gmail.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: Documentation/filesystems/inotify.rst
+F: fs/notify/inotify/
+F: include/linux/inotify.h
+F: include/uapi/linux/inotify.h
+
+INPUT (KEYBOARD, MOUSE, JOYSTICK, TOUCHSCREEN) DRIVERS
+M: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-input/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git
+F: Documentation/devicetree/bindings/input/
+F: Documentation/devicetree/bindings/serio/
+F: Documentation/input/
+F: drivers/input/
+F: include/linux/input.h
+F: include/linux/input/
+F: include/uapi/linux/input-event-codes.h
+F: include/uapi/linux/input.h
+
+INPUT MULTITOUCH (MT) PROTOCOL
+M: Henrik Rydberg <rydberg@bitmath.org>
+L: linux-input@vger.kernel.org
+S: Odd fixes
+F: Documentation/input/multi-touch-protocol.rst
+F: drivers/input/input-mt.c
+K: \b(ABS|SYN)_MT_
+
+INSIDE SECURE CRYPTO DRIVER
+M: Antoine Tenart <atenart@kernel.org>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/inside-secure/
+
+INTEGRITY MEASUREMENT ARCHITECTURE (IMA)
+M: Mimi Zohar <zohar@linux.ibm.com>
+M: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
+L: linux-integrity@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git
+F: security/integrity/ima/
+
+INTEL 810/815 FRAMEBUFFER DRIVER
+M: Antonino Daplas <adaplas@gmail.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/i810/
+
+INTEL ASoC DRIVERS
+M: Cezary Rojewski <cezary.rojewski@intel.com>
+M: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
+M: Liam Girdwood <liam.r.girdwood@linux.intel.com>
+M: Jie Yang <yang.jie@linux.intel.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+F: sound/soc/intel/
+
+INTEL ATOMISP2 DUMMY / POWER-MANAGEMENT DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/atomisp2/pm.c
+
+INTEL ATOMISP2 LED DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/atomisp2/led.c
+
+INTEL BIOS SAR INT1092 DRIVER
+M: Shravan Sudhakar <s.shravan@intel.com>
+M: Intel Corporation <linuxwwan@intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/int1092/
+
+INTEL BROXTON PMC DRIVER
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+M: Zha Qipeng <qipeng.zha@intel.com>
+S: Maintained
+F: drivers/mfd/intel_pmc_bxt.c
+F: include/linux/mfd/intel_pmc_bxt.h
+
+INTEL C600 SERIES SAS CONTROLLER DRIVER
+M: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+T: git git://git.code.sf.net/p/intel-sas/isci
+F: drivers/scsi/isci/
+
+INTEL CPU family model numbers
+M: Tony Luck <tony.luck@intel.com>
+M: x86@kernel.org
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: arch/x86/include/asm/intel-family.h
+
+INTEL DRM DRIVERS (excluding Poulsbo, Moorestown and derivative chipsets)
+M: Jani Nikula <jani.nikula@linux.intel.com>
+M: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
+M: Rodrigo Vivi <rodrigo.vivi@intel.com>
+L: intel-gfx@lists.freedesktop.org
+S: Supported
+W: https://01.org/linuxgraphics/
+Q: http://patchwork.freedesktop.org/project/intel-gfx/
+B: https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs
+C: irc://irc.oftc.net/intel-gfx
+T: git git://anongit.freedesktop.org/drm-intel
+F: Documentation/gpu/i915.rst
+F: drivers/gpu/drm/i915/
+F: include/drm/i915*
+F: include/uapi/drm/i915_drm.h
+
+INTEL ETHERNET DRIVERS
+M: Jesse Brandeburg <jesse.brandeburg@intel.com>
+M: Tony Nguyen <anthony.l.nguyen@intel.com>
+L: intel-wired-lan@lists.osuosl.org (moderated for non-subscribers)
+S: Supported
+W: http://www.intel.com/support/feedback.htm
+W: http://e1000.sourceforge.net/
+Q: http://patchwork.ozlabs.org/project/intel-wired-lan/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git
+F: Documentation/networking/device_drivers/ethernet/intel/
+F: drivers/net/ethernet/intel/
+F: drivers/net/ethernet/intel/*/
+F: include/linux/avf/virtchnl.h
+F: include/linux/net/intel/iidc.h
+
+INTEL ETHERNET PROTOCOL DRIVER FOR RDMA
+M: Mustafa Ismail <mustafa.ismail@intel.com>
+M: Shiraz Saleem <shiraz.saleem@intel.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/hw/irdma/
+F: include/uapi/rdma/irdma-abi.h
+
+INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
+M: Maik Broemme <mbroemme@libmpq.org>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: Documentation/fb/intelfb.rst
+F: drivers/video/fbdev/intelfb/
+
+INTEL GPIO DRIVERS
+M: Andy Shevchenko <andy@kernel.org>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
+F: drivers/gpio/gpio-ich.c
+F: drivers/gpio/gpio-merrifield.c
+F: drivers/gpio/gpio-ml-ioh.c
+F: drivers/gpio/gpio-pch.c
+F: drivers/gpio/gpio-sch.c
+F: drivers/gpio/gpio-sodaville.c
+
+INTEL GVT-g DRIVERS (Intel GPU Virtualization)
+M: Zhenyu Wang <zhenyuw@linux.intel.com>
+M: Zhi Wang <zhi.a.wang@intel.com>
+L: intel-gvt-dev@lists.freedesktop.org
+L: intel-gfx@lists.freedesktop.org
+S: Supported
+W: https://01.org/igvt-g
+T: git https://github.com/intel/gvt-linux.git
+F: drivers/gpu/drm/i915/gvt/
+
+INTEL HID EVENT DRIVER
+M: Alex Hung <alex.hung@canonical.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/hid.c
+
+INTEL I/OAT DMA DRIVER
+M: Dave Jiang <dave.jiang@intel.com>
+R: Dan Williams <dan.j.williams@intel.com>
+L: dmaengine@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-dmaengine/list/
+F: drivers/dma/ioat*
+
+INTEL IADX DRIVER
+M: Dave Jiang <dave.jiang@intel.com>
+L: dmaengine@vger.kernel.org
+S: Supported
+F: drivers/dma/idxd/*
+F: include/uapi/linux/idxd.h
+
+INTEL IDLE DRIVER
+M: Jacob Pan <jacob.jun.pan@linux.intel.com>
+M: Len Brown <lenb@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git
+F: drivers/idle/intel_idle.c
+
+INTEL INTEGRATED SENSOR HUB DRIVER
+M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
+M: Jiri Kosina <jikos@kernel.org>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/intel-ish-hid/
+
+INTEL IOMMU (VT-d)
+M: David Woodhouse <dwmw2@infradead.org>
+M: Lu Baolu <baolu.lu@linux.intel.com>
+L: iommu@lists.linux-foundation.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
+F: drivers/iommu/intel/
+F: include/linux/intel-iommu.h
+F: include/linux/intel-svm.h
+
+INTEL IOP-ADMA DMA DRIVER
+R: Dan Williams <dan.j.williams@intel.com>
+S: Odd fixes
+F: drivers/dma/iop-adma.c
+
+INTEL IPU3 CSI-2 CIO2 DRIVER
+M: Yong Zhi <yong.zhi@intel.com>
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+M: Bingbu Cao <bingbu.cao@intel.com>
+M: Dan Scally <djrscally@gmail.com>
+R: Tianshu Qiu <tian.shu.qiu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst
+F: drivers/media/pci/intel/ipu3/
+
+INTEL IPU3 CSI-2 IMGU DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+R: Bingbu Cao <bingbu.cao@intel.com>
+R: Tianshu Qiu <tian.shu.qiu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/media/ipu3.rst
+F: Documentation/admin-guide/media/ipu3_rcb.svg
+F: Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst
+F: drivers/staging/media/ipu3/
+
+INTEL IXP4XX CRYPTO SUPPORT
+M: Corentin Labbe <clabbe@baylibre.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/ixp4xx_crypto.c
+
+INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
+M: Krzysztof Halasa <khalasa@piap.pl>
+S: Maintained
+F: drivers/net/ethernet/xscale/ixp4xx_eth.c
+F: drivers/net/wan/ixp4xx_hss.c
+F: drivers/soc/ixp4xx/ixp4xx-npe.c
+F: drivers/soc/ixp4xx/ixp4xx-qmgr.c
+F: include/linux/soc/ixp4xx/npe.h
+F: include/linux/soc/ixp4xx/qmgr.h
+
+INTEL IXP4XX RANDOM NUMBER GENERATOR SUPPORT
+M: Deepak Saxena <dsaxena@plexity.net>
+S: Maintained
+F: Documentation/devicetree/bindings/display/intel,ixp46x-rng.yaml
+F: drivers/char/hw_random/ixp4xx-rng.c
+
+INTEL KEEM BAY DRM DRIVER
+M: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
+M: Edmund Dea <edmund.j.dea@intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/intel,kmb_display.yaml
+F: drivers/gpu/drm/kmb/
+
+INTEL KEEM BAY OCS AES/SM4 CRYPTO DRIVER
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/crypto/intel,keembay-ocs-aes.yaml
+F: drivers/crypto/keembay/Kconfig
+F: drivers/crypto/keembay/Makefile
+F: drivers/crypto/keembay/keembay-ocs-aes-core.c
+F: drivers/crypto/keembay/ocs-aes.c
+F: drivers/crypto/keembay/ocs-aes.h
+
+INTEL KEEM BAY OCS HCU CRYPTO DRIVER
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+M: Declan Murphy <declan.murphy@intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/crypto/intel,keembay-ocs-hcu.yaml
+F: drivers/crypto/keembay/Kconfig
+F: drivers/crypto/keembay/Makefile
+F: drivers/crypto/keembay/keembay-ocs-hcu-core.c
+F: drivers/crypto/keembay/ocs-hcu.c
+F: drivers/crypto/keembay/ocs-hcu.h
+
+INTEL MANAGEMENT ENGINE (mei)
+M: Tomas Winkler <tomas.winkler@intel.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/driver-api/mei/*
+F: drivers/misc/mei/
+F: drivers/watchdog/mei_wdt.c
+F: include/linux/mei_cl_bus.h
+F: include/uapi/linux/mei.h
+F: samples/mei/*
+
+INTEL MAX 10 BMC MFD DRIVER
+M: Xu Yilun <yilun.xu@intel.com>
+R: Tom Rix <trix@redhat.com>
+S: Maintained
+F: Documentation/ABI/testing/sysfs-driver-intel-m10-bmc
+F: Documentation/hwmon/intel-m10-bmc-hwmon.rst
+F: drivers/hwmon/intel-m10-bmc-hwmon.c
+F: drivers/mfd/intel-m10-bmc.c
+F: include/linux/mfd/intel-m10-bmc.h
+
+INTEL MENLOW THERMAL DRIVER
+M: Sujith Thomas <sujith.thomas@intel.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+W: https://01.org/linux-acpi
+F: drivers/thermal/intel/intel_menlow.c
+
+INTEL P-Unit IPC DRIVER
+M: Zha Qipeng <qipeng.zha@intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: arch/x86/include/asm/intel_punit_ipc.h
+F: drivers/platform/x86/intel/punit_ipc.c
+
+INTEL PMC CORE DRIVER
+M: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
+M: David E Box <david.e.box@intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-platform-intel-pmc
+F: drivers/platform/x86/intel/pmc/
+
+INTEL PMIC GPIO DRIVERS
+M: Andy Shevchenko <andy@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
+F: drivers/gpio/gpio-*cove.c
+
+INTEL PMIC MULTIFUNCTION DEVICE DRIVERS
+M: Andy Shevchenko <andy@kernel.org>
+S: Maintained
+F: drivers/mfd/intel_soc_pmic*
+F: include/linux/mfd/intel_soc_pmic*
+
+INTEL PMT DRIVER
+M: "David E. Box" <david.e.box@linux.intel.com>
+S: Maintained
+F: drivers/mfd/intel_pmt.c
+F: drivers/platform/x86/intel/pmt/
+
+INTEL PRO/WIRELESS 2100, 2200BG, 2915ABG NETWORK CONNECTION SUPPORT
+M: Stanislav Yakovlev <stas.yakovlev@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: Documentation/networking/device_drivers/wifi/intel/ipw2100.rst
+F: Documentation/networking/device_drivers/wifi/intel/ipw2200.rst
+F: drivers/net/wireless/intel/ipw2x00/
+
+INTEL PSTATE DRIVER
+M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
+M: Len Brown <lenb@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: drivers/cpufreq/intel_pstate.c
+
+INTEL QUADRATURE ENCODER PERIPHERAL DRIVER
+M: Jarkko Nikula <jarkko.nikula@linux.intel.com>
+L: linux-iio@vger.kernel.org
+F: drivers/counter/intel-qep.c
+
+INTEL SCU DRIVERS
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+S: Maintained
+F: arch/x86/include/asm/intel_scu_ipc.h
+F: drivers/platform/x86/intel_scu_*
+
+INTEL SKYLAKE INT3472 ACPI DEVICE DRIVER
+M: Daniel Scally <djrscally@gmail.com>
+S: Maintained
+F: drivers/platform/x86/intel/int3472/
+
+INTEL SPEED SELECT TECHNOLOGY
+M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/speed_select_if/
+F: include/uapi/linux/isst_if.h
+F: tools/power/x86/intel-speed-select/
+
+INTEL STRATIX10 FIRMWARE DRIVERS
+M: Dinh Nguyen <dinguyen@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-devices-platform-stratix10-rsu
+F: Documentation/devicetree/bindings/firmware/intel,stratix10-svc.txt
+F: drivers/firmware/stratix10-rsu.c
+F: drivers/firmware/stratix10-svc.c
+F: include/linux/firmware/intel/stratix10-smc.h
+F: include/linux/firmware/intel/stratix10-svc-client.h
+
+INTEL TELEMETRY DRIVER
+M: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
+M: "David E. Box" <david.e.box@linux.intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: arch/x86/include/asm/intel_telemetry.h
+F: drivers/platform/x86/intel/telemetry/
+
+INTEL UNCORE FREQUENCY CONTROL
+M: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/uncore-frequency.c
+
+INTEL VIRTUAL BUTTON DRIVER
+M: AceLan Kao <acelan.kao@canonical.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/intel/vbtn.c
+
+INTEL WIRELESS 3945ABG/BG, 4965AGN (iwlegacy)
+M: Stanislaw Gruszka <stf_xl@wp.pl>
+L: linux-wireless@vger.kernel.org
+S: Supported
+F: drivers/net/wireless/intel/iwlegacy/
+
+INTEL WIRELESS WIFI LINK (iwlwifi)
+M: Luca Coelho <luciano.coelho@intel.com>
+L: linux-wireless@vger.kernel.org
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi.git
+F: drivers/net/wireless/intel/iwlwifi/
+
+INTEL WMI SLIM BOOTLOADER (SBL) FIRMWARE UPDATE DRIVER
+M: Jithu Joseph <jithu.joseph@intel.com>
+R: Maurice Ma <maurice.ma@intel.com>
+S: Maintained
+W: https://slimbootloader.github.io/security/firmware-update.html
+F: drivers/platform/x86/intel/wmi/sbl-fw-update.c
+
+INTEL WMI THUNDERBOLT FORCE POWER DRIVER
+L: Dell.Client.Kernel@dell.com
+S: Maintained
+F: drivers/platform/x86/intel/wmi/thunderbolt.c
+
+INTEL WWAN IOSM DRIVER
+M: M Chetan Kumar <m.chetan.kumar@intel.com>
+M: Intel Corporation <linuxwwan@intel.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/wwan/iosm/
+
+INTEL(R) TRACE HUB
+M: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+S: Supported
+F: Documentation/trace/intel_th.rst
+F: drivers/hwtracing/intel_th/
+F: include/linux/intel_th.h
+
+INTEL(R) TRUSTED EXECUTION TECHNOLOGY (TXT)
+M: Ning Sun <ning.sun@intel.com>
+L: tboot-devel@lists.sourceforge.net
+S: Supported
+W: http://tboot.sourceforge.net
+T: hg http://tboot.hg.sourceforge.net:8000/hgroot/tboot/tboot
+F: Documentation/x86/intel_txt.rst
+F: arch/x86/kernel/tboot.c
+F: include/linux/tboot.h
+
+INTEL SGX
+M: Jarkko Sakkinen <jarkko@kernel.org>
+R: Dave Hansen <dave.hansen@linux.intel.com>
+L: linux-sgx@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/intel-sgx/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/sgx
+F: Documentation/x86/sgx.rst
+F: arch/x86/entry/vdso/vsgx.S
+F: arch/x86/include/asm/sgx.h
+F: arch/x86/include/uapi/asm/sgx.h
+F: arch/x86/kernel/cpu/sgx/*
+F: tools/testing/selftests/sgx/*
+K: \bSGX_
+
+INTERCONNECT API
+M: Georgi Djakov <djakov@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/djakov/icc.git
+F: Documentation/devicetree/bindings/interconnect/
+F: Documentation/driver-api/interconnect.rst
+F: drivers/interconnect/
+F: include/dt-bindings/interconnect/
+F: include/linux/interconnect-provider.h
+F: include/linux/interconnect.h
+
+INTERRUPT COUNTER DRIVER
+M: Oleksij Rempel <o.rempel@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+L: linux-iio@vger.kernel.org
+F: Documentation/devicetree/bindings/counter/interrupt-counter.yaml
+F: drivers/counter/interrupt-cnt.c
+
+INVENSENSE ICM-426xx IMU DRIVER
+M: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+W: https://invensense.tdk.com/
+F: Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml
+F: drivers/iio/imu/inv_icm42600/
+
+INVENSENSE MPU-3050 GYROSCOPE DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml
+F: drivers/iio/gyro/mpu3050*
+
+IOC3 ETHERNET DRIVER
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/sgi/ioc3-eth.c
+
+IOMAP FILESYSTEM LIBRARY
+M: Christoph Hellwig <hch@infradead.org>
+M: Darrick J. Wong <djwong@kernel.org>
+M: linux-xfs@vger.kernel.org
+M: linux-fsdevel@vger.kernel.org
+L: linux-xfs@vger.kernel.org
+L: linux-fsdevel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git
+F: fs/iomap/
+F: include/linux/iomap.h
+
+IOMMU DRIVERS
+M: Joerg Roedel <joro@8bytes.org>
+M: Will Deacon <will@kernel.org>
+L: iommu@lists.linux-foundation.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
+F: Documentation/devicetree/bindings/iommu/
+F: Documentation/userspace-api/iommu.rst
+F: drivers/iommu/
+F: include/linux/iommu.h
+F: include/linux/iova.h
+F: include/linux/of_iommu.h
+F: include/uapi/linux/iommu.h
+
+IO_URING
+M: Jens Axboe <axboe@kernel.dk>
+R: Pavel Begunkov <asml.silence@gmail.com>
+L: io-uring@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.dk/linux-block
+T: git git://git.kernel.dk/liburing
+F: fs/io-wq.c
+F: fs/io-wq.h
+F: fs/io_uring.c
+F: include/linux/io_uring.h
+F: include/uapi/linux/io_uring.h
+F: tools/io_uring/
+
+IPMI SUBSYSTEM
+M: Corey Minyard <minyard@acm.org>
+L: openipmi-developer@lists.sourceforge.net (moderated for non-subscribers)
+S: Supported
+W: http://openipmi.sourceforge.net/
+F: Documentation/driver-api/ipmi.rst
+F: Documentation/devicetree/bindings/ipmi/
+F: drivers/char/ipmi/
+F: include/linux/ipmi*
+F: include/uapi/linux/ipmi*
+
+IPS SCSI RAID DRIVER
+M: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+W: http://www.adaptec.com/
+F: drivers/scsi/ips*
+
+IPVS
+M: Simon Horman <horms@verge.net.au>
+M: Julian Anastasov <ja@ssi.bg>
+L: netdev@vger.kernel.org
+L: lvs-devel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs-next.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs.git
+F: Documentation/networking/ipvs-sysctl.rst
+F: include/net/ip_vs.h
+F: include/uapi/linux/ip_vs.h
+F: net/netfilter/ipvs/
+
+IPWIRELESS DRIVER
+M: Jiri Kosina <jikos@kernel.org>
+M: David Sterba <dsterba@suse.com>
+S: Odd Fixes
+F: drivers/tty/ipwireless/
+
+IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY)
+M: Marc Zyngier <maz@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
+F: Documentation/core-api/irq/irq-domain.rst
+F: include/linux/irqdomain.h
+F: kernel/irq/irqdomain.c
+F: kernel/irq/msi.c
+
+IRQ SUBSYSTEM
+M: Thomas Gleixner <tglx@linutronix.de>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
+F: kernel/irq/
+
+IRQCHIP DRIVERS
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Marc Zyngier <maz@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
+F: Documentation/devicetree/bindings/interrupt-controller/
+F: drivers/irqchip/
+
+ISA
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+S: Maintained
+F: Documentation/driver-api/isa.rst
+F: drivers/base/isa.c
+F: include/linux/isa.h
+
+ISA RADIO MODULE
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-isa*
+
+ISAPNP
+M: Jaroslav Kysela <perex@perex.cz>
+S: Maintained
+F: Documentation/driver-api/isapnp.rst
+F: drivers/pnp/isapnp/
+F: include/linux/isapnp.h
+
+ISCSI
+M: Lee Duncan <lduncan@suse.com>
+M: Chris Leech <cleech@redhat.com>
+L: open-iscsi@googlegroups.com
+L: linux-scsi@vger.kernel.org
+S: Maintained
+W: www.open-iscsi.com
+F: drivers/scsi/*iscsi*
+F: include/scsi/*iscsi*
+
+iSCSI BOOT FIRMWARE TABLE (iBFT) DRIVER
+M: Peter Jones <pjones@redhat.com>
+M: Konrad Rzeszutek Wilk <konrad@kernel.org>
+S: Maintained
+F: drivers/firmware/iscsi_ibft*
+
+ISCSI EXTENSIONS FOR RDMA (ISER) INITIATOR
+M: Sagi Grimberg <sagi@grimberg.me>
+M: Max Gurtovoy <mgurtovoy@nvidia.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.openfabrics.org
+W: www.open-iscsi.org
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/ulp/iser/
+
+ISCSI EXTENSIONS FOR RDMA (ISER) TARGET
+M: Sagi Grimberg <sagi@grimberg.me>
+L: linux-rdma@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+W: http://www.linux-iscsi.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git master
+F: drivers/infiniband/ulp/isert
+
+ISDN/CMTP OVER BLUETOOTH
+M: Karsten Keil <isdn@linux-pingi.de>
+L: isdn4linux@listserv.isdn4linux.de (subscribers-only)
+L: netdev@vger.kernel.org
+S: Odd Fixes
+W: http://www.isdn4linux.de
+F: Documentation/isdn/
+F: drivers/isdn/capi/
+F: include/linux/isdn/
+F: include/uapi/linux/isdn/
+F: net/bluetooth/cmtp/
+
+ISDN/mISDN SUBSYSTEM
+M: Karsten Keil <isdn@linux-pingi.de>
+L: isdn4linux@listserv.isdn4linux.de (subscribers-only)
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.isdn4linux.de
+F: drivers/isdn/Kconfig
+F: drivers/isdn/Makefile
+F: drivers/isdn/hardware/
+F: drivers/isdn/mISDN/
+
+IT87 HARDWARE MONITORING DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/it87.rst
+F: drivers/hwmon/it87.c
+
+IT913X MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/it913x*
+
+ITE IT66121 HDMI BRIDGE DRIVER
+M: Phong LE <ple@baylibre.com>
+M: Neil Armstrong <narmstrong@baylibre.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml
+F: drivers/gpu/drm/bridge/ite-it66121.c
+
+IVTV VIDEO4LINUX DRIVER
+M: Andy Walls <awalls@md.metrocast.net>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/ivtv*
+F: drivers/media/pci/ivtv/
+F: include/uapi/linux/ivtv*
+
+IX2505V MEDIA DRIVER
+M: Malcolm Priestley <tvboxspy@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/ix2505v*
+
+JAILHOUSE HYPERVISOR INTERFACE
+M: Jan Kiszka <jan.kiszka@siemens.com>
+L: jailhouse-dev@googlegroups.com
+S: Maintained
+F: arch/x86/include/asm/jailhouse_para.h
+F: arch/x86/kernel/jailhouse.c
+
+JC42.4 TEMPERATURE SENSOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/jc42.rst
+F: drivers/hwmon/jc42.c
+
+JFS FILESYSTEM
+M: Dave Kleikamp <shaggy@kernel.org>
+L: jfs-discussion@lists.sourceforge.net
+S: Maintained
+W: http://jfs.sourceforge.net/
+T: git git://github.com/kleikamp/linux-shaggy.git
+F: Documentation/admin-guide/jfs.rst
+F: fs/jfs/
+
+JME NETWORK DRIVER
+M: Guo-Fu Tseng <cooldavid@cooldavid.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/jme.*
+
+JOURNALLING FLASH FILE SYSTEM V2 (JFFS2)
+M: David Woodhouse <dwmw2@infradead.org>
+M: Richard Weinberger <richard@nod.at>
+L: linux-mtd@lists.infradead.org
+S: Odd Fixes
+W: http://www.linux-mtd.infradead.org/doc/jffs2.html
+T: git git://git.infradead.org/ubifs-2.6.git
+F: fs/jffs2/
+F: include/uapi/linux/jffs2.h
+
+JOURNALLING LAYER FOR BLOCK DEVICES (JBD2)
+M: "Theodore Ts'o" <tytso@mit.edu>
+M: Jan Kara <jack@suse.com>
+L: linux-ext4@vger.kernel.org
+S: Maintained
+F: fs/jbd2/
+F: include/linux/jbd2.h
+
+JPU V4L2 MEM2MEM DRIVER FOR RENESAS
+M: Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/rcar_jpu.c
+
+JSM Neo PCI based serial card
+L: linux-serial@vger.kernel.org
+S: Orphan
+F: drivers/tty/serial/jsm/
+
+K10TEMP HARDWARE MONITORING DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/k10temp.rst
+F: drivers/hwmon/k10temp.c
+
+K8TEMP HARDWARE MONITORING DRIVER
+M: Rudolf Marek <r.marek@assembler.cz>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/k8temp.rst
+F: drivers/hwmon/k8temp.c
+
+KASAN
+M: Andrey Ryabinin <ryabinin.a.a@gmail.com>
+R: Alexander Potapenko <glider@google.com>
+R: Andrey Konovalov <andreyknvl@gmail.com>
+R: Dmitry Vyukov <dvyukov@google.com>
+L: kasan-dev@googlegroups.com
+S: Maintained
+F: Documentation/dev-tools/kasan.rst
+F: arch/*/include/asm/*kasan.h
+F: arch/*/mm/kasan_init*
+F: include/linux/kasan*.h
+F: lib/Kconfig.kasan
+F: lib/test_kasan*.c
+F: mm/kasan/
+F: scripts/Makefile.kasan
+
+KCONFIG
+M: Masahiro Yamada <masahiroy@kernel.org>
+L: linux-kbuild@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git kconfig
+F: Documentation/kbuild/kconfig*
+F: scripts/Kconfig.include
+F: scripts/kconfig/
+
+KCOV
+R: Dmitry Vyukov <dvyukov@google.com>
+R: Andrey Konovalov <andreyknvl@gmail.com>
+L: kasan-dev@googlegroups.com
+S: Maintained
+F: Documentation/dev-tools/kcov.rst
+F: include/linux/kcov.h
+F: include/uapi/linux/kcov.h
+F: kernel/kcov.c
+F: scripts/Makefile.kcov
+
+KCSAN
+M: Marco Elver <elver@google.com>
+R: Dmitry Vyukov <dvyukov@google.com>
+L: kasan-dev@googlegroups.com
+S: Maintained
+F: Documentation/dev-tools/kcsan.rst
+F: include/linux/kcsan*.h
+F: kernel/kcsan/
+F: lib/Kconfig.kcsan
+F: scripts/Makefile.kcsan
+
+KDUMP
+M: Dave Young <dyoung@redhat.com>
+M: Baoquan He <bhe@redhat.com>
+R: Vivek Goyal <vgoyal@redhat.com>
+L: kexec@lists.infradead.org
+S: Maintained
+W: http://lse.sourceforge.net/kdump/
+F: Documentation/admin-guide/kdump/
+F: fs/proc/vmcore.c
+F: include/linux/crash_core.h
+F: include/linux/crash_dump.h
+F: include/uapi/linux/vmcore.h
+F: kernel/crash_*.c
+
+KEENE FM RADIO TRANSMITTER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-keene*
+
+KERNEL AUTOMOUNTER
+M: Ian Kent <raven@themaw.net>
+L: autofs@vger.kernel.org
+S: Maintained
+F: fs/autofs/
+
+KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
+M: Masahiro Yamada <masahiroy@kernel.org>
+M: Michal Marek <michal.lkml@markovi.net>
+R: Nick Desaulniers <ndesaulniers@google.com>
+L: linux-kbuild@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
+F: Documentation/kbuild/
+F: Makefile
+F: scripts/*vmlinux*
+F: scripts/Kbuild*
+F: scripts/Makefile*
+F: scripts/basic/
+F: scripts/dummy-tools/
+F: scripts/mk*
+F: scripts/mod/
+F: scripts/package/
+
+KERNEL JANITORS
+L: kernel-janitors@vger.kernel.org
+S: Odd Fixes
+W: http://kernelnewbies.org/KernelJanitors
+
+KERNEL NFSD, SUNRPC, AND LOCKD SERVERS
+M: "J. Bruce Fields" <bfields@fieldses.org>
+M: Chuck Lever <chuck.lever@oracle.com>
+L: linux-nfs@vger.kernel.org
+S: Supported
+W: http://nfs.sourceforge.net/
+T: git git://linux-nfs.org/~bfields/linux.git
+F: fs/lockd/
+F: fs/nfs_common/
+F: fs/nfsd/
+F: include/linux/lockd/
+F: include/linux/sunrpc/
+F: include/uapi/linux/nfsd/
+F: include/uapi/linux/sunrpc/
+F: net/sunrpc/
+F: Documentation/filesystems/nfs/
+
+KERNEL REGRESSIONS
+M: Thorsten Leemhuis <linux@leemhuis.info>
+L: regressions@lists.linux.dev
+S: Supported
+
+KERNEL SELFTEST FRAMEWORK
+M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
+L: linux-kselftest@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-kselftest/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
+F: Documentation/dev-tools/kselftest*
+F: tools/testing/selftests/
+
+KERNEL SMB3 SERVER (KSMBD)
+M: Namjae Jeon <linkinjeon@kernel.org>
+M: Sergey Senozhatsky <senozhatsky@chromium.org>
+M: Steve French <sfrench@samba.org>
+M: Hyunchul Lee <hyc.lee@gmail.com>
+L: linux-cifs@vger.kernel.org
+S: Maintained
+T: git git://git.samba.org/ksmbd.git
+F: fs/ksmbd/
+F: fs/smbfs_common/
+
+KERNEL UNIT TESTING FRAMEWORK (KUnit)
+M: Brendan Higgins <brendanhiggins@google.com>
+L: linux-kselftest@vger.kernel.org
+L: kunit-dev@googlegroups.com
+S: Maintained
+W: https://google.github.io/kunit-docs/third_party/kernel/docs/
+F: Documentation/dev-tools/kunit/
+F: include/kunit/
+F: lib/kunit/
+F: tools/testing/kunit/
+
+KERNEL USERMODE HELPER
+M: Luis Chamberlain <mcgrof@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: include/linux/umh.h
+F: kernel/umh.c
+
+KERNEL VIRTUAL MACHINE (KVM)
+M: Paolo Bonzini <pbonzini@redhat.com>
+L: kvm@vger.kernel.org
+S: Supported
+W: http://www.linux-kvm.org
+T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
+F: Documentation/virt/kvm/
+F: include/asm-generic/kvm*
+F: include/kvm/iodev.h
+F: include/linux/kvm*
+F: include/trace/events/kvm.h
+F: include/uapi/asm-generic/kvm*
+F: include/uapi/linux/kvm*
+F: tools/kvm/
+F: tools/testing/selftests/kvm/
+F: virt/kvm/*
+
+KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)
+M: Marc Zyngier <maz@kernel.org>
+R: James Morse <james.morse@arm.com>
+R: Alexandru Elisei <alexandru.elisei@arm.com>
+R: Suzuki K Poulose <suzuki.poulose@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: kvmarm@lists.cs.columbia.edu (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git
+F: arch/arm64/include/asm/kvm*
+F: arch/arm64/include/uapi/asm/kvm*
+F: arch/arm64/kvm/
+F: include/kvm/arm_*
+F: tools/testing/selftests/kvm/*/aarch64/
+F: tools/testing/selftests/kvm/aarch64/
+
+KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)
+M: Huacai Chen <chenhuacai@kernel.org>
+M: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
+L: linux-mips@vger.kernel.org
+L: kvm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
+F: arch/mips/include/asm/kvm*
+F: arch/mips/include/uapi/asm/kvm*
+F: arch/mips/kvm/
+
+KERNEL VIRTUAL MACHINE FOR POWERPC (KVM/powerpc)
+M: Paul Mackerras <paulus@ozlabs.org>
+L: kvm-ppc@vger.kernel.org
+S: Supported
+W: http://www.linux-kvm.org/
+T: git git://github.com/agraf/linux-2.6.git
+F: arch/powerpc/include/asm/kvm*
+F: arch/powerpc/include/uapi/asm/kvm*
+F: arch/powerpc/kernel/kvm*
+F: arch/powerpc/kvm/
+
+KERNEL VIRTUAL MACHINE for s390 (KVM/s390)
+M: Christian Borntraeger <borntraeger@de.ibm.com>
+M: Janosch Frank <frankja@linux.ibm.com>
+R: David Hildenbrand <david@redhat.com>
+R: Claudio Imbrenda <imbrenda@linux.ibm.com>
+L: kvm@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git
+F: Documentation/virt/kvm/s390*
+F: arch/s390/include/asm/gmap.h
+F: arch/s390/include/asm/kvm*
+F: arch/s390/include/uapi/asm/kvm*
+F: arch/s390/kernel/uv.c
+F: arch/s390/kvm/
+F: arch/s390/mm/gmap.c
+F: tools/testing/selftests/kvm/*/s390x/
+F: tools/testing/selftests/kvm/s390x/
+
+KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)
+M: Paolo Bonzini <pbonzini@redhat.com>
+R: Sean Christopherson <seanjc@google.com>
+R: Vitaly Kuznetsov <vkuznets@redhat.com>
+R: Wanpeng Li <wanpengli@tencent.com>
+R: Jim Mattson <jmattson@google.com>
+R: Joerg Roedel <joro@8bytes.org>
+L: kvm@vger.kernel.org
+S: Supported
+W: http://www.linux-kvm.org
+T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
+F: arch/x86/include/asm/kvm*
+F: arch/x86/include/asm/pvclock-abi.h
+F: arch/x86/include/asm/svm.h
+F: arch/x86/include/asm/vmx*.h
+F: arch/x86/include/uapi/asm/kvm*
+F: arch/x86/include/uapi/asm/svm.h
+F: arch/x86/include/uapi/asm/vmx.h
+F: arch/x86/kernel/kvm.c
+F: arch/x86/kernel/kvmclock.c
+F: arch/x86/kvm/
+F: arch/x86/kvm/*/
+
+KERNFS
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+M: Tejun Heo <tj@kernel.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
+F: fs/kernfs/
+F: include/linux/kernfs.h
+
+KEXEC
+M: Eric Biederman <ebiederm@xmission.com>
+L: kexec@lists.infradead.org
+S: Maintained
+W: http://kernel.org/pub/linux/utils/kernel/kexec/
+F: include/linux/kexec.h
+F: include/uapi/linux/kexec.h
+F: kernel/kexec*
+
+KEYS-ENCRYPTED
+M: Mimi Zohar <zohar@linux.ibm.com>
+L: linux-integrity@vger.kernel.org
+L: keyrings@vger.kernel.org
+S: Supported
+F: Documentation/security/keys/trusted-encrypted.rst
+F: include/keys/encrypted-type.h
+F: security/keys/encrypted-keys/
+
+KEYS-TRUSTED
+M: James Bottomley <jejb@linux.ibm.com>
+M: Jarkko Sakkinen <jarkko@kernel.org>
+M: Mimi Zohar <zohar@linux.ibm.com>
+L: linux-integrity@vger.kernel.org
+L: keyrings@vger.kernel.org
+S: Supported
+F: Documentation/security/keys/trusted-encrypted.rst
+F: include/keys/trusted-type.h
+F: include/keys/trusted_tpm.h
+F: security/keys/trusted-keys/
+
+KEYS-TRUSTED-TEE
+M: Sumit Garg <sumit.garg@linaro.org>
+L: linux-integrity@vger.kernel.org
+L: keyrings@vger.kernel.org
+S: Supported
+F: include/keys/trusted_tee.h
+F: security/keys/trusted-keys/trusted_tee.c
+
+KEYS/KEYRINGS
+M: David Howells <dhowells@redhat.com>
+M: Jarkko Sakkinen <jarkko@kernel.org>
+L: keyrings@vger.kernel.org
+S: Maintained
+F: Documentation/security/keys/core.rst
+F: include/keys/
+F: include/linux/key-type.h
+F: include/linux/key.h
+F: include/linux/keyctl.h
+F: include/uapi/linux/keyctl.h
+F: security/keys/
+
+KFENCE
+M: Alexander Potapenko <glider@google.com>
+M: Marco Elver <elver@google.com>
+R: Dmitry Vyukov <dvyukov@google.com>
+L: kasan-dev@googlegroups.com
+S: Maintained
+F: Documentation/dev-tools/kfence.rst
+F: arch/*/include/asm/kfence.h
+F: include/linux/kfence.h
+F: lib/Kconfig.kfence
+F: mm/kfence/
+
+KFIFO
+M: Stefani Seibold <stefani@seibold.net>
+S: Maintained
+F: include/linux/kfifo.h
+F: lib/kfifo.c
+F: samples/kfifo/
+
+KGDB / KDB /debug_core
+M: Jason Wessel <jason.wessel@windriver.com>
+M: Daniel Thompson <daniel.thompson@linaro.org>
+R: Douglas Anderson <dianders@chromium.org>
+L: kgdb-bugreport@lists.sourceforge.net
+S: Maintained
+W: http://kgdb.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb.git
+F: Documentation/dev-tools/kgdb.rst
+F: drivers/misc/kgdbts.c
+F: drivers/tty/serial/kgdboc.c
+F: include/linux/kdb.h
+F: include/linux/kgdb.h
+F: kernel/debug/
+
+KHADAS MCU MFD DRIVER
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: linux-amlogic@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
+F: drivers/mfd/khadas-mcu.c
+F: include/linux/mfd/khadas-mcu.h
+F: drivers/thermal/khadas_mcu_fan.c
+
+KMEMLEAK
+M: Catalin Marinas <catalin.marinas@arm.com>
+S: Maintained
+F: Documentation/dev-tools/kmemleak.rst
+F: include/linux/kmemleak.h
+F: mm/kmemleak.c
+F: samples/kmemleak/kmemleak-test.c
+
+KMOD KERNEL MODULE LOADER - USERMODE HELPER
+M: Luis Chamberlain <mcgrof@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: include/linux/kmod.h
+F: kernel/kmod.c
+F: lib/test_kmod.c
+F: tools/testing/selftests/kmod/
+
+KPROBES
+M: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
+M: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
+M: "David S. Miller" <davem@davemloft.net>
+M: Masami Hiramatsu <mhiramat@kernel.org>
+S: Maintained
+F: Documentation/trace/kprobes.rst
+F: include/asm-generic/kprobes.h
+F: include/linux/kprobes.h
+F: kernel/kprobes.c
+
+KS0108 LCD CONTROLLER DRIVER
+M: Miguel Ojeda <ojeda@kernel.org>
+S: Maintained
+F: Documentation/admin-guide/auxdisplay/ks0108.rst
+F: drivers/auxdisplay/ks0108.c
+F: include/linux/ks0108.h
+
+KTD253 BACKLIGHT DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+F: Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
+F: drivers/video/backlight/ktd253-backlight.c
+
+KTEST
+M: Steven Rostedt <rostedt@goodmis.org>
+M: John Hawley <warthog9@eaglescrag.net>
+S: Maintained
+F: tools/testing/ktest
+
+L3MDEV
+M: David Ahern <dsahern@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/net/l3mdev.h
+F: net/l3mdev
+
+L7 BPF FRAMEWORK
+M: John Fastabend <john.fastabend@gmail.com>
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: Jakub Sitnicki <jakub@cloudflare.com>
+M: Lorenz Bauer <lmb@cloudflare.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: include/linux/skmsg.h
+F: net/core/skmsg.c
+F: net/core/sock_map.c
+F: net/ipv4/tcp_bpf.c
+F: net/ipv4/udp_bpf.c
+F: net/unix/unix_bpf.c
+
+LANDLOCK SECURITY MODULE
+M: Mickaël Salaün <mic@digikod.net>
+L: linux-security-module@vger.kernel.org
+S: Supported
+W: https://landlock.io
+T: git https://github.com/landlock-lsm/linux.git
+F: Documentation/security/landlock.rst
+F: Documentation/userspace-api/landlock.rst
+F: include/uapi/linux/landlock.h
+F: samples/landlock/
+F: security/landlock/
+F: tools/testing/selftests/landlock/
+K: landlock
+K: LANDLOCK
+
+LANTIQ / INTEL Ethernet drivers
+M: Hauke Mehrtens <hauke@hauke-m.de>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/dsa/lantiq_gswip.c
+F: drivers/net/dsa/lantiq_pce.h
+F: drivers/net/ethernet/lantiq_xrx200.c
+F: net/dsa/tag_gswip.c
+
+LANTIQ MIPS ARCHITECTURE
+M: John Crispin <john@phrozen.org>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/lantiq
+F: drivers/soc/lantiq
+
+LASI 53c700 driver for PARISC
+M: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: Documentation/scsi/53c700.rst
+F: drivers/scsi/53c700*
+
+LEAKING_ADDRESSES
+M: Tobin C. Harding <me@tobin.cc>
+M: Tycho Andersen <tycho@tycho.pizza>
+L: linux-hardening@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tobin/leaks.git
+F: scripts/leaking_addresses.pl
+
+LED SUBSYSTEM
+M: Pavel Machek <pavel@ucw.cz>
+L: linux-leds@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git
+F: Documentation/devicetree/bindings/leds/
+F: drivers/leds/
+F: include/linux/leds.h
+
+LEGACY EEPROM DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+S: Maintained
+F: Documentation/misc-devices/eeprom.rst
+F: drivers/misc/eeprom/eeprom.c
+
+LEGO MINDSTORMS EV3
+R: David Lechner <david@lechnology.com>
+S: Maintained
+F: Documentation/devicetree/bindings/power/supply/lego,ev3-battery.yaml
+F: arch/arm/boot/dts/da850-lego-ev3.dts
+F: drivers/power/supply/lego_ev3_battery.c
+
+LEGO USB Tower driver
+M: Juergen Stuber <starblue@users.sourceforge.net>
+L: legousb-devel@lists.sourceforge.net
+S: Maintained
+W: http://legousb.sourceforge.net/
+F: drivers/usb/misc/legousbtower.c
+
+LG LAPTOP EXTRAS
+M: Matan Ziv-Av <matan@svgalib.org>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-platform-lg-laptop
+F: Documentation/admin-guide/laptops/lg-laptop.rst
+F: drivers/platform/x86/lg-laptop.c
+
+LG2160 MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/dvb-frontends/lg2160.*
+
+LGDT3305 MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/dvb-frontends/lgdt3305.*
+
+LIBATA PATA ARASAN COMPACT FLASH CONTROLLER
+M: Viresh Kumar <vireshk@kernel.org>
+L: linux-ide@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
+F: drivers/ata/pata_arasan_cf.c
+F: include/linux/pata_arasan_cf_data.h
+
+LIBATA PATA FARADAY FTIDE010 AND GEMINI SATA BRIDGE DRIVERS
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-ide@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
+F: drivers/ata/pata_ftide010.c
+F: drivers/ata/sata_gemini.c
+F: drivers/ata/sata_gemini.h
+
+LIBATA SATA AHCI PLATFORM devices support
+M: Hans de Goede <hdegoede@redhat.com>
+M: Jens Axboe <axboe@kernel.dk>
+L: linux-ide@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
+F: drivers/ata/ahci_platform.c
+F: drivers/ata/libahci_platform.c
+F: include/linux/ahci_platform.h
+
+LIBATA SATA PROMISE TX2/TX4 CONTROLLER DRIVER
+M: Mikael Pettersson <mikpelinux@gmail.com>
+L: linux-ide@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
+F: drivers/ata/sata_promise.*
+
+LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)
+M: Damien Le Moal <damien.lemoal@opensource.wdc.com>
+L: linux-ide@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata.git
+F: Documentation/devicetree/bindings/ata/
+F: drivers/ata/
+F: include/linux/ata.h
+F: include/linux/libata.h
+
+LIBLOCKDEP
+M: Sasha Levin <alexander.levin@microsoft.com>
+S: Maintained
+F: tools/lib/lockdep/
+
+LIBNVDIMM BLK: MMIO-APERTURE DRIVER
+M: Dan Williams <dan.j.williams@intel.com>
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Dave Jiang <dave.jiang@intel.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
+P: Documentation/nvdimm/maintainer-entry-profile.rst
+F: drivers/nvdimm/blk.c
+F: drivers/nvdimm/region_devs.c
+
+LIBNVDIMM BTT: BLOCK TRANSLATION TABLE
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Dan Williams <dan.j.williams@intel.com>
+M: Dave Jiang <dave.jiang@intel.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
+P: Documentation/nvdimm/maintainer-entry-profile.rst
+F: drivers/nvdimm/btt*
+
+LIBNVDIMM PMEM: PERSISTENT MEMORY DRIVER
+M: Dan Williams <dan.j.williams@intel.com>
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Dave Jiang <dave.jiang@intel.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
+P: Documentation/nvdimm/maintainer-entry-profile.rst
+F: drivers/nvdimm/pmem*
+
+LIBNVDIMM: DEVICETREE BINDINGS
+M: Oliver O'Halloran <oohall@gmail.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
+F: Documentation/devicetree/bindings/pmem/pmem-region.txt
+F: drivers/nvdimm/of_pmem.c
+
+LIBNVDIMM: NON-VOLATILE MEMORY DEVICE SUBSYSTEM
+M: Dan Williams <dan.j.williams@intel.com>
+M: Vishal Verma <vishal.l.verma@intel.com>
+M: Dave Jiang <dave.jiang@intel.com>
+M: Ira Weiny <ira.weiny@intel.com>
+L: nvdimm@lists.linux.dev
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
+P: Documentation/nvdimm/maintainer-entry-profile.rst
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git
+F: drivers/acpi/nfit/*
+F: drivers/nvdimm/*
+F: include/linux/libnvdimm.h
+F: include/linux/nd.h
+F: include/uapi/linux/ndctl.h
+F: tools/testing/nvdimm/
+
+LICENSES and SPDX stuff
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-spdx@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx.git
+F: COPYING
+F: Documentation/process/license-rules.rst
+F: LICENSES/
+F: scripts/spdxcheck-test.sh
+F: scripts/spdxcheck.py
+
+LINEAR RANGES HELPERS
+M: Mark Brown <broonie@kernel.org>
+R: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
+F: lib/linear_ranges.c
+F: lib/test_linear_ranges.c
+F: include/linux/linear_range.h
+
+LINUX FOR POWER MACINTOSH
+M: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Odd Fixes
+F: arch/powerpc/platforms/powermac/
+F: drivers/macintosh/
+
+LINUX FOR POWERPC (32-BIT AND 64-BIT)
+M: Michael Ellerman <mpe@ellerman.id.au>
+R: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+R: Paul Mackerras <paulus@samba.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+W: https://github.com/linuxppc/wiki/wiki
+Q: http://patchwork.ozlabs.org/project/linuxppc-dev/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
+F: Documentation/ABI/stable/sysfs-firmware-opal-*
+F: Documentation/devicetree/bindings/i2c/i2c-opal.txt
+F: Documentation/devicetree/bindings/powerpc/
+F: Documentation/devicetree/bindings/rtc/rtc-opal.txt
+F: Documentation/powerpc/
+F: arch/powerpc/
+F: drivers/*/*/*pasemi*
+F: drivers/*/*pasemi*
+F: drivers/char/tpm/tpm_ibmvtpm*
+F: drivers/crypto/nx/
+F: drivers/crypto/vmx/
+F: drivers/i2c/busses/i2c-opal.c
+F: drivers/net/ethernet/ibm/ibmveth.*
+F: drivers/net/ethernet/ibm/ibmvnic.*
+F: drivers/pci/hotplug/pnv_php.c
+F: drivers/pci/hotplug/rpa*
+F: drivers/rtc/rtc-opal.c
+F: drivers/scsi/ibmvscsi/
+F: drivers/tty/hvc/hvc_opal.c
+F: drivers/watchdog/wdrtas.c
+F: tools/testing/selftests/powerpc
+N: /pmac
+N: powermac
+N: powernv
+N: [^a-z0-9]ps3
+N: pseries
+
+LINUX FOR POWERPC EMBEDDED MPC5XXX
+M: Anatolij Gustschin <agust@denx.de>
+L: linuxppc-dev@lists.ozlabs.org
+S: Odd Fixes
+F: arch/powerpc/platforms/512x/
+F: arch/powerpc/platforms/52xx/
+
+LINUX FOR POWERPC EMBEDDED PPC4XX
+L: linuxppc-dev@lists.ozlabs.org
+S: Orphan
+F: arch/powerpc/platforms/40x/
+F: arch/powerpc/platforms/44x/
+
+LINUX FOR POWERPC EMBEDDED PPC83XX AND PPC85XX
+M: Scott Wood <oss@buserror.net>
+L: linuxppc-dev@lists.ozlabs.org
+S: Odd fixes
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux.git
+F: Documentation/devicetree/bindings/powerpc/fsl/
+F: arch/powerpc/platforms/83xx/
+F: arch/powerpc/platforms/85xx/
+
+LINUX FOR POWERPC EMBEDDED PPC8XX
+M: Christophe Leroy <christophe.leroy@csgroup.eu>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: arch/powerpc/platforms/8xx/
+
+LINUX KERNEL DUMP TEST MODULE (LKDTM)
+M: Kees Cook <keescook@chromium.org>
+S: Maintained
+F: drivers/misc/lkdtm/*
+F: tools/testing/selftests/lkdtm/*
+
+LINUX KERNEL MEMORY CONSISTENCY MODEL (LKMM)
+M: Alan Stern <stern@rowland.harvard.edu>
+M: Andrea Parri <parri.andrea@gmail.com>
+M: Will Deacon <will@kernel.org>
+M: Peter Zijlstra <peterz@infradead.org>
+M: Boqun Feng <boqun.feng@gmail.com>
+M: Nicholas Piggin <npiggin@gmail.com>
+M: David Howells <dhowells@redhat.com>
+M: Jade Alglave <j.alglave@ucl.ac.uk>
+M: Luc Maranget <luc.maranget@inria.fr>
+M: "Paul E. McKenney" <paulmck@kernel.org>
+R: Akira Yokosawa <akiyks@gmail.com>
+R: Daniel Lustig <dlustig@nvidia.com>
+R: Joel Fernandes <joel@joelfernandes.org>
+L: linux-kernel@vger.kernel.org
+L: linux-arch@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
+F: Documentation/atomic_bitops.txt
+F: Documentation/atomic_t.txt
+F: Documentation/core-api/refcount-vs-atomic.rst
+F: Documentation/litmus-tests/
+F: Documentation/memory-barriers.txt
+F: tools/memory-model/
+
+LIS3LV02D ACCELEROMETER DRIVER
+M: Eric Piel <eric.piel@tremplin-utc.net>
+S: Maintained
+F: Documentation/misc-devices/lis3lv02d.rst
+F: drivers/misc/lis3lv02d/
+F: drivers/platform/x86/hp_accel.c
+
+LIST KUNIT TEST
+M: David Gow <davidgow@google.com>
+L: linux-kselftest@vger.kernel.org
+L: kunit-dev@googlegroups.com
+S: Maintained
+F: lib/list-test.c
+
+LITEX PLATFORM
+M: Karol Gugala <kgugala@antmicro.com>
+M: Mateusz Holenko <mholenko@antmicro.com>
+S: Maintained
+F: Documentation/devicetree/bindings/*/litex,*.yaml
+F: arch/openrisc/boot/dts/or1klitex.dts
+F: drivers/soc/litex/litex_soc_ctrl.c
+F: drivers/tty/serial/liteuart.c
+F: include/linux/litex.h
+
+LIVE PATCHING
+M: Josh Poimboeuf <jpoimboe@redhat.com>
+M: Jiri Kosina <jikos@kernel.org>
+M: Miroslav Benes <mbenes@suse.cz>
+M: Petr Mladek <pmladek@suse.com>
+R: Joe Lawrence <joe.lawrence@redhat.com>
+L: live-patching@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching.git
+F: Documentation/ABI/testing/sysfs-kernel-livepatch
+F: Documentation/livepatch/
+F: arch/powerpc/include/asm/livepatch.h
+F: arch/s390/include/asm/livepatch.h
+F: arch/x86/include/asm/livepatch.h
+F: include/linux/livepatch.h
+F: kernel/livepatch/
+F: lib/livepatch/
+F: samples/livepatch/
+F: tools/testing/selftests/livepatch/
+
+LLC (802.2)
+L: netdev@vger.kernel.org
+S: Odd fixes
+F: include/linux/llc.h
+F: include/net/llc*
+F: include/uapi/linux/llc.h
+F: net/llc/
+
+LM73 HARDWARE MONITOR DRIVER
+M: Guillaume Ligneul <guillaume.ligneul@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/lm73.c
+
+LM78 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/lm78.rst
+F: drivers/hwmon/lm78.c
+
+LM83 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/lm83.rst
+F: drivers/hwmon/lm83.c
+
+LM90 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/hwmon/lm90.txt
+F: Documentation/hwmon/lm90.rst
+F: drivers/hwmon/lm90.c
+F: include/dt-bindings/thermal/lm90.h
+
+LM95234 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/lm95234.rst
+F: drivers/hwmon/lm95234.c
+
+LME2510 MEDIA DRIVER
+M: Malcolm Priestley <tvboxspy@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/usb/dvb-usb-v2/lmedm04*
+
+LOADPIN SECURITY MODULE
+M: Kees Cook <keescook@chromium.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git lsm/loadpin
+F: Documentation/admin-guide/LSM/LoadPin.rst
+F: security/loadpin/
+
+LOCKING PRIMITIVES
+M: Peter Zijlstra <peterz@infradead.org>
+M: Ingo Molnar <mingo@redhat.com>
+M: Will Deacon <will@kernel.org>
+R: Waiman Long <longman@redhat.com>
+R: Boqun Feng <boqun.feng@gmail.com> (LOCKDEP)
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core
+F: Documentation/locking/
+F: arch/*/include/asm/spinlock*.h
+F: include/linux/lockdep.h
+F: include/linux/mutex*.h
+F: include/linux/rwlock*.h
+F: include/linux/rwsem*.h
+F: include/linux/seqlock.h
+F: include/linux/spinlock*.h
+F: kernel/locking/
+F: lib/locking*.[ch]
+X: kernel/locking/locktorture.c
+
+LOGICAL DISK MANAGER SUPPORT (LDM, Windows 2000/XP/Vista Dynamic Disks)
+M: "Richard Russon (FlatCap)" <ldm@flatcap.org>
+L: linux-ntfs-dev@lists.sourceforge.net
+S: Maintained
+W: http://www.linux-ntfs.org/content/view/19/37/
+F: Documentation/admin-guide/ldm.rst
+F: block/partitions/ldm.*
+
+LOGITECH HID GAMING KEYBOARDS
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git
+F: drivers/hid/hid-lg-g15.c
+
+LONTIUM LT8912B MIPI TO HDMI BRIDGE
+M: Adrien Grassein <adrien.grassein@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
+F: drivers/gpu/drm/bridge/lontium-lt8912b.c
+
+LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
+M: Sathya Prakash <sathya.prakash@broadcom.com>
+M: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
+M: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
+L: MPT-FusionLinux.pdl@broadcom.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+W: http://www.avagotech.com/support/
+F: drivers/message/fusion/
+F: drivers/scsi/mpt3sas/
+
+LSILOGIC/SYMBIOS/NCR 53C8XX and 53C1010 PCI-SCSI drivers
+M: Matthew Wilcox <willy@infradead.org>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/sym53c8xx_2/
+
+LTC1660 DAC DRIVER
+M: Marcus Folkesson <marcus.folkesson@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
+F: drivers/iio/dac/ltc1660.c
+
+LTC2947 HARDWARE MONITOR DRIVER
+M: Nuno Sá <nuno.sa@analog.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml
+F: drivers/hwmon/ltc2947-core.c
+F: drivers/hwmon/ltc2947-i2c.c
+F: drivers/hwmon/ltc2947-spi.c
+F: drivers/hwmon/ltc2947.h
+
+LTC2983 IIO TEMPERATURE DRIVER
+M: Nuno Sá <nuno.sa@analog.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+F: drivers/iio/temperature/ltc2983.c
+
+LTC4261 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/ltc4261.rst
+F: drivers/hwmon/ltc4261.c
+
+LTC4306 I2C MULTIPLEXER DRIVER
+M: Michael Hennerich <michael.hennerich@analog.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+W: http://ez.analog.com/community/linux-device-drivers
+F: Documentation/devicetree/bindings/i2c/i2c-mux-ltc4306.txt
+F: drivers/i2c/muxes/i2c-mux-ltc4306.c
+
+LTP (Linux Test Project)
+M: Mike Frysinger <vapier@gentoo.org>
+M: Cyril Hrubis <chrubis@suse.cz>
+M: Wanlong Gao <wanlong.gao@gmail.com>
+M: Jan Stancek <jstancek@redhat.com>
+M: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
+M: Alexey Kodanev <alexey.kodanev@oracle.com>
+L: ltp@lists.linux.it (subscribers-only)
+S: Maintained
+W: http://linux-test-project.github.io/
+T: git git://github.com/linux-test-project/ltp.git
+
+LYNX PCS MODULE
+M: Ioana Ciornei <ioana.ciornei@nxp.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/pcs/pcs-lynx.c
+F: include/linux/pcs-lynx.h
+
+M68K ARCHITECTURE
+M: Geert Uytterhoeven <geert@linux-m68k.org>
+L: linux-m68k@lists.linux-m68k.org
+S: Maintained
+W: http://www.linux-m68k.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git
+F: arch/m68k/
+F: drivers/zorro/
+
+M68K ON APPLE MACINTOSH
+M: Joshua Thompson <funaho@jurai.org>
+L: linux-m68k@lists.linux-m68k.org
+S: Maintained
+W: http://www.mac.linux-m68k.org/
+F: arch/m68k/mac/
+F: drivers/macintosh/adb-iop.c
+F: drivers/macintosh/via-macii.c
+
+M68K ON HP9000/300
+M: Philip Blundell <philb@gnu.org>
+S: Maintained
+W: http://www.tazenda.demon.co.uk/phil/linux-hp
+F: arch/m68k/hp300/
+
+M88DS3103 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/m88ds3103*
+
+M88RS2000 MEDIA DRIVER
+M: Malcolm Priestley <tvboxspy@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/m88rs2000*
+
+MA901 MASTERKIT USB FM RADIO DRIVER
+M: Alexey Klimov <klimov.linux@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-ma901.c
+
+MAC80211
+M: Johannes Berg <johannes@sipsolutions.net>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
+F: Documentation/networking/mac80211-injection.rst
+F: Documentation/networking/mac80211_hwsim/mac80211_hwsim.rst
+F: drivers/net/wireless/mac80211_hwsim.[ch]
+F: include/net/mac80211.h
+F: net/mac80211/
+
+MAILBOX API
+M: Jassi Brar <jassisinghbrar@gmail.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/mailbox/
+F: include/linux/mailbox_client.h
+F: include/linux/mailbox_controller.h
+F: include/dt-bindings/mailbox/
+F: Documentation/devicetree/bindings/mailbox/
+
+MAILBOX ARM MHUv2
+M: Viresh Kumar <viresh.kumar@linaro.org>
+M: Tushar Khandelwal <Tushar.Khandelwal@arm.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/mailbox/arm_mhuv2.c
+F: include/linux/mailbox/arm_mhuv2_message.h
+F: Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml
+
+MANAGEMENT COMPONENT TRANSPORT PROTOCOL (MCTP)
+M: Jeremy Kerr <jk@codeconstruct.com.au>
+M: Matt Johnston <matt@codeconstruct.com.au>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/networking/mctp.rst
+F: drivers/net/mctp/
+F: include/net/mctp.h
+F: include/net/mctpdevice.h
+F: include/net/netns/mctp.h
+F: net/mctp/
+
+MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
+M: Michael Kerrisk <mtk.manpages@gmail.com>
+L: linux-man@vger.kernel.org
+S: Maintained
+W: http://www.kernel.org/doc/man-pages
+
+MARDUK (CREATOR CI40) DEVICE TREE SUPPORT
+M: Rahul Bedarkar <rahulbedarkar89@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/boot/dts/img/pistachio*
+
+MARVELL 88E6XXX ETHERNET SWITCH FABRIC DRIVER
+M: Andrew Lunn <andrew@lunn.ch>
+M: Vivien Didelot <vivien.didelot@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/marvell.txt
+F: Documentation/networking/devlink/mv88e6xxx.rst
+F: drivers/net/dsa/mv88e6xxx/
+F: include/linux/dsa/mv88e6xxx.h
+F: include/linux/platform_data/mv88e6xxx.h
+
+MARVELL ARMADA 3700 PHY DRIVERS
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+S: Maintained
+F: Documentation/devicetree/bindings/phy/phy-mvebu-comphy.txt
+F: Documentation/devicetree/bindings/phy/marvell,armada-3700-utmi-phy.yaml
+F: drivers/phy/marvell/phy-mvebu-a3700-comphy.c
+F: drivers/phy/marvell/phy-mvebu-a3700-utmi.c
+
+MARVELL ARMADA DRM SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+S: Maintained
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git drm-armada-devel
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git drm-armada-fixes
+F: Documentation/devicetree/bindings/display/armada/
+F: drivers/gpu/drm/armada/
+F: include/uapi/drm/armada_drm.h
+
+MARVELL CRYPTO DRIVER
+M: Boris Brezillon <bbrezillon@kernel.org>
+M: Arnaud Ebalard <arno@natisbad.org>
+M: Srujana Challa <schalla@marvell.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/marvell/
+F: include/linux/soc/marvell/octeontx2/
+
+MARVELL GIGABIT ETHERNET DRIVERS (skge/sky2)
+M: Mirko Lindner <mlindner@marvell.com>
+M: Stephen Hemminger <stephen@networkplumber.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/marvell/sk*
+
+MARVELL LIBERTAS WIRELESS DRIVER
+L: libertas-dev@lists.infradead.org
+S: Orphan
+F: drivers/net/wireless/marvell/libertas/
+
+MARVELL MACCHIATOBIN SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts
+
+MARVELL MV643XX ETHERNET DRIVER
+M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/marvell/mv643xx_eth.*
+F: include/linux/mv643xx.h
+
+MARVELL MV88X3310 PHY DRIVER
+M: Russell King <linux@armlinux.org.uk>
+M: Marek Behún <kabel@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/phy/marvell10g.c
+
+MARVELL MVEBU THERMAL DRIVER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+S: Maintained
+F: drivers/thermal/armada_thermal.c
+
+MARVELL MVNETA ETHERNET DRIVER
+M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/marvell/mvneta.*
+
+MARVELL MVPP2 ETHERNET DRIVER
+M: Marcin Wojtas <mw@semihalf.com>
+M: Russell King <linux@armlinux.org.uk>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/marvell-pp2.txt
+F: drivers/net/ethernet/marvell/mvpp2/
+
+MARVELL MWIFIEX WIRELESS DRIVER
+M: Amitkumar Karwar <amitkarwar@gmail.com>
+M: Ganapathi Bhat <ganapathi017@gmail.com>
+M: Sharvari Harisangam <sharvari.harisangam@nxp.com>
+M: Xinming Hu <huxinming820@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/marvell/mwifiex/
+
+MARVELL MWL8K WIRELESS DRIVER
+M: Lennert Buytenhek <buytenh@wantstofly.org>
+L: linux-wireless@vger.kernel.org
+S: Odd Fixes
+F: drivers/net/wireless/marvell/mwl8k.c
+
+MARVELL NAND CONTROLLER DRIVER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mtd/marvell-nand.txt
+F: drivers/mtd/nand/raw/marvell_nand.c
+
+MARVELL OCTEONTX2 PHYSICAL FUNCTION DRIVER
+M: Sunil Goutham <sgoutham@marvell.com>
+M: Geetha sowjanya <gakula@marvell.com>
+M: Subbaraya Sundeep <sbhatta@marvell.com>
+M: hariprasad <hkelam@marvell.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/marvell/octeontx2/nic/
+F: include/linux/soc/marvell/octeontx2/
+
+MARVELL OCTEONTX2 RVU ADMIN FUNCTION DRIVER
+M: Sunil Goutham <sgoutham@marvell.com>
+M: Linu Cherian <lcherian@marvell.com>
+M: Geetha sowjanya <gakula@marvell.com>
+M: Jerin Jacob <jerinj@marvell.com>
+M: hariprasad <hkelam@marvell.com>
+M: Subbaraya Sundeep <sbhatta@marvell.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst
+F: drivers/net/ethernet/marvell/octeontx2/af/
+
+MARVELL PRESTERA ETHERNET SWITCH DRIVER
+M: Taras Chornyi <tchornyi@marvell.com>
+S: Supported
+W: https://github.com/Marvell-switching/switchdev-prestera
+F: drivers/net/ethernet/marvell/prestera/
+
+MARVELL SOC MMC/SD/SDIO CONTROLLER DRIVER
+M: Nicolas Pitre <nico@fluxnic.net>
+S: Odd Fixes
+F: drivers/mmc/host/mvsdio.*
+
+MARVELL USB MDIO CONTROLLER DRIVER
+M: Tobias Waldekranz <tobias@waldekranz.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/marvell,mvusb.yaml
+F: drivers/net/mdio/mdio-mvusb.c
+
+MARVELL XENON MMC/SD/SDIO HOST CONTROLLER DRIVER
+M: Hu Ziji <huziji@marvell.com>
+L: linux-mmc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mmc/marvell,xenon-sdhci.txt
+F: drivers/mmc/host/sdhci-xenon*
+
+MATROX FRAMEBUFFER DRIVER
+L: linux-fbdev@vger.kernel.org
+S: Orphan
+F: drivers/video/fbdev/matrox/matroxfb_*
+F: include/uapi/linux/matroxfb.h
+
+MAX15301 DRIVER
+M: Daniel Nilsson <daniel.nilsson@flex.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/max15301.rst
+F: drivers/hwmon/pmbus/max15301.c
+
+MAX16065 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/max16065.rst
+F: drivers/hwmon/max16065.c
+
+MAX2175 SDR TUNER DRIVER
+M: Ramesh Shanmugasundaram <rashanmu@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/max2175.txt
+F: Documentation/userspace-api/media/drivers/max2175.rst
+F: drivers/media/i2c/max2175*
+F: include/uapi/linux/max2175.h
+
+MAX6650 HARDWARE MONITOR AND FAN CONTROLLER DRIVER
+L: linux-hwmon@vger.kernel.org
+S: Orphan
+F: Documentation/hwmon/max6650.rst
+F: drivers/hwmon/max6650.c
+
+MAX6697 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/hwmon/max6697.txt
+F: Documentation/hwmon/max6697.rst
+F: drivers/hwmon/max6697.c
+F: include/linux/platform_data/max6697.h
+
+MAX9286 QUAD GMSL DESERIALIZER DRIVER
+M: Jacopo Mondi <jacopo+renesas@jmondi.org>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+M: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+M: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
+F: drivers/media/i2c/max9286.c
+
+MAX9860 MONO AUDIO VOICE CODEC DRIVER
+M: Peter Rosin <peda@axentia.se>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/max9860.txt
+F: sound/soc/codecs/max9860.*
+
+MAXBOTIX ULTRASONIC RANGER IIO DRIVER
+M: Andreas Klinger <ak@it-klinger.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/proximity/maxbotix,mb1232.yaml
+F: drivers/iio/proximity/mb1232.c
+
+MAXIM MAX77650 PMIC MFD DRIVER
+M: Bartosz Golaszewski <brgl@bgdev.pl>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/*/*max77650.yaml
+F: Documentation/devicetree/bindings/*/max77650*.yaml
+F: drivers/gpio/gpio-max77650.c
+F: drivers/input/misc/max77650-onkey.c
+F: drivers/leds/leds-max77650.c
+F: drivers/mfd/max77650.c
+F: drivers/power/supply/max77650-charger.c
+F: drivers/regulator/max77650-regulator.c
+F: include/linux/mfd/max77650.h
+
+MAXIM MAX77802 PMIC REGULATOR DEVICE DRIVER
+M: Javier Martinez Canillas <javier@dowhile0.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/*/*max77802.txt
+F: drivers/regulator/max77802-regulator.c
+F: include/dt-bindings/*/*max77802.h
+
+MAXIM MUIC CHARGER DRIVERS FOR EXYNOS BASED BOARDS
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: drivers/power/supply/max14577_charger.c
+F: drivers/power/supply/max77693_charger.c
+
+MAXIM PMIC AND MUIC DRIVERS FOR EXYNOS BASED BOARDS
+M: Chanwoo Choi <cw00.choi@samsung.com>
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/*/max77686.txt
+F: Documentation/devicetree/bindings/clock/maxim,max77686.txt
+F: Documentation/devicetree/bindings/mfd/max14577.txt
+F: Documentation/devicetree/bindings/mfd/max77693.txt
+F: drivers/*/max14577*.c
+F: drivers/*/max77686*.c
+F: drivers/*/max77693*.c
+F: drivers/clk/clk-max77686.c
+F: drivers/extcon/extcon-max14577.c
+F: drivers/extcon/extcon-max77693.c
+F: drivers/rtc/rtc-max77686.c
+F: include/linux/mfd/max14577*.h
+F: include/linux/mfd/max77686*.h
+F: include/linux/mfd/max77693*.h
+
+MAXIRADIO FM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-maxiradio*
+
+MAXLINEAR ETHERNET PHY DRIVER
+M: Xu Liang <lxu@maxlinear.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/phy/mxl-gpy.c
+
+MCBA MICROCHIP CAN BUS ANALYZER TOOL DRIVER
+R: Yasushi SHOJI <yashi@spacecubics.com>
+L: linux-can@vger.kernel.org
+S: Maintained
+F: drivers/net/can/usb/mcba_usb.c
+
+MCAN MMIO DEVICE DRIVER
+M: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
+L: linux-can@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+F: drivers/net/can/m_can/m_can.c
+F: drivers/net/can/m_can/m_can.h
+F: drivers/net/can/m_can/m_can_platform.c
+
+MCP2221A MICROCHIP USB-HID TO I2C BRIDGE DRIVER
+M: Rishi Gupta <gupt21@gmail.com>
+L: linux-i2c@vger.kernel.org
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-mcp2221.c
+
+MCP251XFD SPI-CAN NETWORK DRIVER
+M: Marc Kleine-Budde <mkl@pengutronix.de>
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+R: Thomas Kopp <thomas.kopp@microchip.com>
+L: linux-can@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/can/microchip,mcp251xfd.yaml
+F: drivers/net/can/spi/mcp251xfd/
+
+MCP4018 AND MCP4531 MICROCHIP DIGITAL POTENTIOMETER DRIVERS
+M: Peter Rosin <peda@axentia.se>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-iio-potentiometer-mcp4531
+F: drivers/iio/potentiometer/mcp4018.c
+F: drivers/iio/potentiometer/mcp4531.c
+
+MCR20A IEEE-802.15.4 RADIO DRIVER
+M: Xue Liu <liuxuenetmail@gmail.com>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+W: https://github.com/xueliu/mcr20a-linux
+F: Documentation/devicetree/bindings/net/ieee802154/mcr20a.txt
+F: drivers/net/ieee802154/mcr20a.c
+F: drivers/net/ieee802154/mcr20a.h
+
+MEASUREMENT COMPUTING CIO-DAC IIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: drivers/iio/dac/cio-dac.c
+
+MEDIA CONTROLLER FRAMEWORK
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://www.linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/mc/
+F: include/media/media-*.h
+F: include/uapi/linux/media.h
+
+MEDIA DRIVER FOR FREESCALE IMX PXP
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/platform/imx-pxp.[ch]
+
+MEDIA DRIVERS FOR ASCOT2E
+M: Sergey Kozlov <serjk@netup.ru>
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/ascot2e*
+
+MEDIA DRIVERS FOR CXD2099AR CI CONTROLLERS
+M: Jasmin Jessich <jasmin@anw.at>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/cxd2099*
+
+MEDIA DRIVERS FOR CXD2841ER
+M: Sergey Kozlov <serjk@netup.ru>
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/cxd2841er*
+
+MEDIA DRIVERS FOR CXD2880
+M: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
+L: linux-media@vger.kernel.org
+S: Supported
+W: http://linuxtv.org/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/cxd2880/*
+F: drivers/media/spi/cxd2880*
+
+MEDIA DRIVERS FOR DIGITAL DEVICES PCIE DEVICES
+L: linux-media@vger.kernel.org
+S: Orphan
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/ddbridge/*
+
+MEDIA DRIVERS FOR FREESCALE IMX
+M: Steve Longerbeam <slongerbeam@gmail.com>
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/imx.rst
+F: Documentation/devicetree/bindings/media/imx.txt
+F: drivers/staging/media/imx/
+F: include/linux/imx-media.h
+F: include/media/imx.h
+
+MEDIA DRIVERS FOR FREESCALE IMX7
+M: Rui Miguel Silva <rmfrfs@gmail.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/imx7.rst
+F: Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
+F: Documentation/devicetree/bindings/media/nxp,imx7-mipi-csi2.yaml
+F: drivers/staging/media/imx/imx7-media-csi.c
+F: drivers/staging/media/imx/imx7-mipi-csis.c
+
+MEDIA DRIVERS FOR HELENE
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/helene*
+
+MEDIA DRIVERS FOR HORUS3A
+M: Sergey Kozlov <serjk@netup.ru>
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/horus3a*
+
+MEDIA DRIVERS FOR LNBH25
+M: Sergey Kozlov <serjk@netup.ru>
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/lnbh25*
+
+MEDIA DRIVERS FOR MXL5XX TUNER DEMODULATORS
+L: linux-media@vger.kernel.org
+S: Orphan
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/mxl5xx*
+
+MEDIA DRIVERS FOR NETUP PCI UNIVERSAL DVB devices
+M: Sergey Kozlov <serjk@netup.ru>
+M: Abylay Ospan <aospan@netup.ru>
+L: linux-media@vger.kernel.org
+S: Supported
+W: https://linuxtv.org
+W: http://netup.tv/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/netup_unidvb/*
+
+MEDIA DRIVERS FOR NVIDIA TEGRA - VDE
+M: Dmitry Osipenko <digetx@gmail.com>
+L: linux-media@vger.kernel.org
+L: linux-tegra@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/nvidia,tegra-vde.txt
+F: drivers/staging/media/tegra-vde/
+
+MEDIA DRIVERS FOR RENESAS - CEU
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,ceu.yaml
+F: drivers/media/platform/renesas-ceu.c
+F: include/media/drv-intf/renesas-ceu.h
+
+MEDIA DRIVERS FOR RENESAS - DRIF
+M: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,drif.yaml
+F: drivers/media/platform/rcar_drif.c
+
+MEDIA DRIVERS FOR RENESAS - FCP
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,fcp.yaml
+F: drivers/media/platform/rcar-fcp.c
+F: include/media/rcar-fcp.h
+
+MEDIA DRIVERS FOR RENESAS - FDP1
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,fdp1.yaml
+F: drivers/media/platform/rcar_fdp1.c
+
+MEDIA DRIVERS FOR RENESAS - VIN
+M: Niklas Söderlund <niklas.soderlund@ragnatech.se>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,csi2.yaml
+F: Documentation/devicetree/bindings/media/renesas,isp.yaml
+F: Documentation/devicetree/bindings/media/renesas,vin.yaml
+F: drivers/media/platform/rcar-vin/
+
+MEDIA DRIVERS FOR RENESAS - VSP1
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+L: linux-media@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/renesas,vsp1.yaml
+F: drivers/media/platform/vsp1/
+
+MEDIA DRIVERS FOR ST STV0910 DEMODULATOR ICs
+L: linux-media@vger.kernel.org
+S: Orphan
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/stv0910*
+
+MEDIA DRIVERS FOR ST STV6111 TUNER ICs
+L: linux-media@vger.kernel.org
+S: Orphan
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/dvb-frontends/stv6111*
+
+MEDIA DRIVERS FOR STM32 - DCMI
+M: Hugues Fruchet <hugues.fruchet@foss.st.com>
+L: linux-media@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml
+F: drivers/media/platform/stm32/stm32-dcmi.c
+
+MEDIA INPUT INFRASTRUCTURE (V4L/DVB)
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.kernel.org/project/linux-media/list/
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/
+F: Documentation/devicetree/bindings/media/
+F: Documentation/driver-api/media/
+F: Documentation/userspace-api/media/
+F: drivers/media/
+F: drivers/staging/media/
+F: include/linux/platform_data/media/
+F: include/media/
+F: include/uapi/linux/dvb/
+F: include/uapi/linux/ivtv*
+F: include/uapi/linux/media.h
+F: include/uapi/linux/meye.h
+F: include/uapi/linux/uvcvideo.h
+F: include/uapi/linux/v4l2-*
+F: include/uapi/linux/videodev2.h
+
+MEDIATEK BLUETOOTH DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+L: linux-bluetooth@vger.kernel.org
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
+F: drivers/bluetooth/btmtkuart.c
+
+MEDIATEK BOARD LEVEL SHUTDOWN DRIVERS
+M: Sean Wang <sean.wang@mediatek.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
+F: drivers/power/reset/mt6323-poweroff.c
+
+MEDIATEK CIR DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+S: Maintained
+F: drivers/media/rc/mtk-cir.c
+
+MEDIATEK DMA DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+L: dmaengine@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/dma/mtk-*
+F: drivers/dma/mediatek/
+
+MEDIATEK ETHERNET DRIVER
+M: Felix Fietkau <nbd@nbd.name>
+M: John Crispin <john@phrozen.org>
+M: Sean Wang <sean.wang@mediatek.com>
+M: Mark Lee <Mark-MC.Lee@mediatek.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/mediatek/
+
+MEDIATEK I2C CONTROLLER DRIVER
+M: Qii Wang <qii.wang@mediatek.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt
+F: drivers/i2c/busses/i2c-mt65xx.c
+
+MEDIATEK IOMMU DRIVER
+M: Yong Wu <yong.wu@mediatek.com>
+L: iommu@lists.linux-foundation.org
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/iommu/mediatek*
+F: drivers/iommu/mtk_iommu*
+F: include/dt-bindings/memory/mt*-port.h
+
+MEDIATEK JPEG DRIVER
+M: Rick Chang <rick.chang@mediatek.com>
+M: Bin Liu <bin.liu@mediatek.com>
+S: Supported
+F: Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.txt
+F: drivers/media/platform/mtk-jpeg/
+
+MEDIATEK MDP DRIVER
+M: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
+M: Houlong Wei <houlong.wei@mediatek.com>
+M: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
+S: Supported
+F: Documentation/devicetree/bindings/media/mediatek-mdp.txt
+F: drivers/media/platform/mtk-mdp/
+F: drivers/media/platform/mtk-vpu/
+
+MEDIATEK MEDIA DRIVER
+M: Tiffany Lin <tiffany.lin@mediatek.com>
+M: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
+S: Supported
+F: Documentation/devicetree/bindings/media/mediatek-vcodec.txt
+F: Documentation/devicetree/bindings/media/mediatek-vpu.txt
+F: drivers/media/platform/mtk-vcodec/
+F: drivers/media/platform/mtk-vpu/
+
+MEDIATEK MMC/SD/SDIO DRIVER
+M: Chaotian Jing <chaotian.jing@mediatek.com>
+S: Maintained
+F: Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+F: drivers/mmc/host/mtk-sd.c
+
+MEDIATEK MT76 WIRELESS LAN DRIVER
+M: Felix Fietkau <nbd@nbd.name>
+M: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+R: Ryder Lee <ryder.lee@mediatek.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/mediatek/mt76/
+
+MEDIATEK MT7601U WIRELESS LAN DRIVER
+M: Jakub Kicinski <kubakici@wp.pl>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/mediatek/mt7601u/
+
+MEDIATEK MT7621 CLOCK DRIVER
+M: Sergio Paracuellos <sergio.paracuellos@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/clock/mediatek,mt7621-sysc.yaml
+F: drivers/clk/ralink/clk-mt7621.c
+
+MEDIATEK MT7621/28/88 I2C DRIVER
+M: Stefan Roese <sr@denx.de>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-mt7621.txt
+F: drivers/i2c/busses/i2c-mt7621.c
+
+MEDIATEK MT7621 PHY PCI DRIVER
+M: Sergio Paracuellos <sergio.paracuellos@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/phy/mediatek,mt7621-pci-phy.yaml
+F: drivers/phy/ralink/phy-mt7621-pci.c
+
+MEDIATEK NAND CONTROLLER DRIVER
+L: linux-mtd@lists.infradead.org
+S: Orphan
+F: Documentation/devicetree/bindings/mtd/mtk-nand.txt
+F: drivers/mtd/nand/raw/mtk_*
+
+MEDIATEK PMIC LED DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+S: Maintained
+F: Documentation/devicetree/bindings/leds/leds-mt6323.txt
+F: drivers/leds/leds-mt6323.c
+
+MEDIATEK RANDOM NUMBER GENERATOR SUPPORT
+M: Sean Wang <sean.wang@mediatek.com>
+S: Maintained
+F: drivers/char/hw_random/mtk-rng.c
+
+MEDIATEK SWITCH DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+M: Landen Chao <Landen.Chao@mediatek.com>
+M: DENG Qingfang <dqfext@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/dsa/mt7530.*
+F: net/dsa/tag_mtk.c
+
+MEDIATEK USB3 DRD IP DRIVER
+M: Chunfeng Yun <chunfeng.yun@mediatek.com>
+L: linux-usb@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/usb/mediatek,*
+F: drivers/usb/host/xhci-mtk*
+F: drivers/usb/mtu3/
+
+MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
+M: Peter Senna Tschudin <peter.senna@gmail.com>
+M: Martin Donnelly <martin.donnelly@ge.com>
+M: Martyn Welch <martyn.welch@collabora.co.uk>
+S: Maintained
+F: Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
+F: drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
+
+MEGARAID SCSI/SAS DRIVERS
+M: Kashyap Desai <kashyap.desai@broadcom.com>
+M: Sumit Saxena <sumit.saxena@broadcom.com>
+M: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
+L: megaraidlinux.pdl@broadcom.com
+L: linux-scsi@vger.kernel.org
+S: Maintained
+W: http://www.avagotech.com/support/
+F: Documentation/scsi/megaraid.rst
+F: drivers/scsi/megaraid.*
+F: drivers/scsi/megaraid/
+
+MELEXIS MLX90614 DRIVER
+M: Crt Mori <cmo@melexis.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://www.melexis.com
+F: drivers/iio/temperature/mlx90614.c
+
+MELEXIS MLX90632 DRIVER
+M: Crt Mori <cmo@melexis.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+W: http://www.melexis.com
+F: drivers/iio/temperature/mlx90632.c
+
+MELFAS MIP4 TOUCHSCREEN DRIVER
+M: Sangwon Jee <jeesw@melfas.com>
+S: Supported
+W: http://www.melfas.com
+F: Documentation/devicetree/bindings/input/touchscreen/melfas_mip4.txt
+F: drivers/input/touchscreen/melfas_mip4.c
+
+MELLANOX BLUEFIELD I2C DRIVER
+M: Khalil Blaiech <kblaiech@nvidia.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/i2c/mellanox,i2c-mlxbf.yaml
+F: drivers/i2c/busses/i2c-mlxbf.c
+
+MELLANOX ETHERNET DRIVER (mlx4_en)
+M: Tariq Toukan <tariqt@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlx4/en_*
+
+MELLANOX ETHERNET DRIVER (mlx5e)
+M: Saeed Mahameed <saeedm@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlx5/core/en_*
+
+MELLANOX ETHERNET INNOVA DRIVERS
+R: Boris Pismenny <borisp@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlx5/core/accel/*
+F: drivers/net/ethernet/mellanox/mlx5/core/en_accel/*
+F: drivers/net/ethernet/mellanox/mlx5/core/fpga/*
+F: include/linux/mlx5/mlx5_ifc_fpga.h
+
+MELLANOX ETHERNET SWITCH DRIVERS
+M: Jiri Pirko <jiri@nvidia.com>
+M: Ido Schimmel <idosch@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlxsw/
+F: tools/testing/selftests/drivers/net/mlxsw/
+
+MELLANOX FIRMWARE FLASH LIBRARY (mlxfw)
+M: mlxsw@nvidia.com
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlxfw/
+
+MELLANOX HARDWARE PLATFORM SUPPORT
+M: Hans de Goede <hdegoede@redhat.com>
+M: Mark Gross <mgross@linux.intel.com>
+M: Vadim Pasternak <vadimp@nvidia.com>
+L: platform-driver-x86@vger.kernel.org
+S: Supported
+F: Documentation/ABI/testing/sysfs-platform-mellanox-bootctl
+F: drivers/platform/mellanox/
+F: include/linux/platform_data/mlxreg.h
+
+MELLANOX MLX4 core VPI driver
+M: Tariq Toukan <tariqt@nvidia.com>
+L: netdev@vger.kernel.org
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: drivers/net/ethernet/mellanox/mlx4/
+F: include/linux/mlx4/
+
+MELLANOX MLX4 IB driver
+M: Yishai Hadas <yishaih@nvidia.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/hw/mlx4/
+F: include/linux/mlx4/
+F: include/uapi/rdma/mlx4-abi.h
+
+MELLANOX MLX5 core VPI driver
+M: Saeed Mahameed <saeedm@nvidia.com>
+M: Leon Romanovsky <leonro@nvidia.com>
+L: netdev@vger.kernel.org
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+F: Documentation/networking/device_drivers/ethernet/mellanox/
+F: drivers/net/ethernet/mellanox/mlx5/core/
+F: include/linux/mlx5/
+
+MELLANOX MLX5 IB driver
+M: Leon Romanovsky <leonro@nvidia.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+W: http://www.mellanox.com
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/hw/mlx5/
+F: include/linux/mlx5/
+F: include/uapi/rdma/mlx5-abi.h
+
+MELLANOX MLXCPLD I2C AND MUX DRIVER
+M: Vadim Pasternak <vadimp@nvidia.com>
+M: Michael Shych <michaelsh@nvidia.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+F: Documentation/i2c/busses/i2c-mlxcpld.rst
+F: drivers/i2c/busses/i2c-mlxcpld.c
+F: drivers/i2c/muxes/i2c-mux-mlxcpld.c
+
+MELLANOX MLXCPLD LED DRIVER
+M: Vadim Pasternak <vadimp@nvidia.com>
+L: linux-leds@vger.kernel.org
+S: Supported
+F: Documentation/leds/leds-mlxcpld.rst
+F: drivers/leds/leds-mlxcpld.c
+F: drivers/leds/leds-mlxreg.c
+
+MELLANOX PLATFORM DRIVER
+M: Vadim Pasternak <vadimp@nvidia.com>
+L: platform-driver-x86@vger.kernel.org
+S: Supported
+F: drivers/platform/x86/mlx-platform.c
+
+MEMBARRIER SUPPORT
+M: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+M: "Paul E. McKenney" <paulmck@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: arch/powerpc/include/asm/membarrier.h
+F: include/uapi/linux/membarrier.h
+F: kernel/sched/membarrier.c
+
+MEMBLOCK
+M: Mike Rapoport <rppt@linux.ibm.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: Documentation/core-api/boot-time-mm.rst
+F: include/linux/memblock.h
+F: mm/memblock.c
+
+MEMORY CONTROLLER DRIVERS
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl.git
+F: Documentation/devicetree/bindings/memory-controllers/
+F: drivers/memory/
+F: include/dt-bindings/memory/
+F: include/memory/
+
+MEMORY FREQUENCY SCALING DRIVERS FOR NVIDIA TEGRA
+M: Dmitry Osipenko <digetx@gmail.com>
+L: linux-pm@vger.kernel.org
+L: linux-tegra@vger.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
+S: Maintained
+F: drivers/devfreq/tegra30-devfreq.c
+
+MEMORY MANAGEMENT
+M: Andrew Morton <akpm@linux-foundation.org>
+L: linux-mm@kvack.org
+S: Maintained
+W: http://www.linux-mm.org
+T: quilt https://ozlabs.org/~akpm/mmotm/
+T: quilt https://ozlabs.org/~akpm/mmots/
+T: git git://github.com/hnaz/linux-mm.git
+F: include/linux/gfp.h
+F: include/linux/memory_hotplug.h
+F: include/linux/mm.h
+F: include/linux/mmzone.h
+F: include/linux/pagewalk.h
+F: include/linux/vmalloc.h
+F: mm/
+F: tools/testing/selftests/vm/
+
+MEMORY TECHNOLOGY DEVICES (MTD)
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+M: Richard Weinberger <richard@nod.at>
+M: Vignesh Raghavendra <vigneshr@ti.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+W: http://www.linux-mtd.infradead.org/
+Q: http://patchwork.ozlabs.org/project/linux-mtd/list/
+C: irc://irc.oftc.net/mtd
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/fixes
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next
+F: Documentation/devicetree/bindings/mtd/
+F: drivers/mtd/
+F: include/linux/mtd/
+F: include/uapi/mtd/
+
+MEN A21 WATCHDOG DRIVER
+M: Johannes Thumshirn <morbidrsa@gmail.com>
+L: linux-watchdog@vger.kernel.org
+S: Maintained
+F: drivers/watchdog/mena21_wdt.c
+
+MEN CHAMELEON BUS (mcb)
+M: Johannes Thumshirn <morbidrsa@gmail.com>
+S: Maintained
+F: Documentation/driver-api/men-chameleon-bus.rst
+F: drivers/mcb/
+F: include/linux/mcb.h
+
+MEN F21BMC (Board Management Controller)
+M: Andreas Werner <andreas.werner@men.de>
+S: Supported
+F: Documentation/hwmon/menf21bmc.rst
+F: drivers/hwmon/menf21bmc_hwmon.c
+F: drivers/leds/leds-menf21bmc.c
+F: drivers/mfd/menf21bmc.c
+F: drivers/watchdog/menf21bmc_wdt.c
+
+MEN Z069 WATCHDOG DRIVER
+M: Johannes Thumshirn <jth@kernel.org>
+L: linux-watchdog@vger.kernel.org
+S: Maintained
+F: drivers/watchdog/menz69_wdt.c
+
+MESON AO CEC DRIVER FOR AMLOGIC SOCS
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: linux-media@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Supported
+W: http://linux-meson.com/
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/amlogic,meson-gx-ao-cec.yaml
+F: drivers/media/cec/platform/meson/ao-cec-g12a.c
+F: drivers/media/cec/platform/meson/ao-cec.c
+
+MESON GE2D DRIVER FOR AMLOGIC SOCS
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: linux-media@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/amlogic,axg-ge2d.yaml
+F: drivers/media/platform/meson/ge2d/
+
+MESON NAND CONTROLLER DRIVER FOR AMLOGIC SOCS
+M: Liang Yang <liang.yang@amlogic.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/mtd/amlogic,meson-nand.txt
+F: drivers/mtd/nand/raw/meson_*
+
+MESON VIDEO DECODER DRIVER FOR AMLOGIC SOCS
+M: Neil Armstrong <narmstrong@baylibre.com>
+L: linux-media@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/amlogic,gx-vdec.yaml
+F: drivers/staging/media/meson/vdec/
+
+METHODE UDPU SUPPORT
+M: Vladimir Vid <vladimir.vid@sartura.hr>
+S: Maintained
+F: arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+
+MHI BUS
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+M: Hemant Kumar <hemantk@codeaurora.org>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git
+F: Documentation/ABI/stable/sysfs-bus-mhi
+F: Documentation/mhi/
+F: drivers/bus/mhi/
+F: include/linux/mhi.h
+
+MICROBLAZE ARCHITECTURE
+M: Michal Simek <monstr@monstr.eu>
+S: Supported
+W: http://www.monstr.eu/fdt/
+T: git git://git.monstr.eu/linux-2.6-microblaze.git
+F: arch/microblaze/
+
+MICROCHIP AT91 DMA DRIVERS
+M: Ludovic Desroches <ludovic.desroches@microchip.com>
+M: Tudor Ambarus <tudor.ambarus@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: dmaengine@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/dma/atmel-dma.txt
+F: drivers/dma/at_hdmac.c
+F: drivers/dma/at_hdmac_regs.h
+F: drivers/dma/at_xdmac.c
+F: include/dt-bindings/dma/at91.h
+
+MICROCHIP AT91 SERIAL DRIVER
+M: Richard Genoud <richard.genoud@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/atmel-usart.txt
+F: drivers/tty/serial/atmel_serial.c
+F: drivers/tty/serial/atmel_serial.h
+
+MICROCHIP AT91 USART MFD DRIVER
+M: Radu Pirea <radu_nicolae.pirea@upb.ro>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mfd/atmel-usart.txt
+F: drivers/mfd/at91-usart.c
+F: include/dt-bindings/mfd/at91-usart.h
+
+MICROCHIP AT91 USART SPI DRIVER
+M: Radu Pirea <radu_nicolae.pirea@upb.ro>
+L: linux-spi@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mfd/atmel-usart.txt
+F: drivers/spi/spi-at91-usart.c
+
+MICROCHIP AUDIO ASOC DRIVERS
+M: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+F: sound/soc/atmel
+
+MICROCHIP ECC DRIVER
+M: Tudor Ambarus <tudor.ambarus@microchip.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/atmel-ecc.*
+
+MICROCHIP I2C DRIVER
+M: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+F: drivers/i2c/busses/i2c-at91-*.c
+F: drivers/i2c/busses/i2c-at91.h
+
+MICROCHIP ISC DRIVER
+M: Eugen Hristev <eugen.hristev@microchip.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/media/atmel,isc.yaml
+F: Documentation/devicetree/bindings/media/microchip,xisc.yaml
+F: drivers/media/platform/atmel/atmel-isc-base.c
+F: drivers/media/platform/atmel/atmel-isc-regs.h
+F: drivers/media/platform/atmel/atmel-isc.h
+F: drivers/media/platform/atmel/atmel-sama5d2-isc.c
+F: drivers/media/platform/atmel/atmel-sama7g5-isc.c
+F: include/linux/atmel-isc-media.h
+
+MICROCHIP ISI DRIVER
+M: Eugen Hristev <eugen.hristev@microchip.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/platform/atmel/atmel-isi.c
+F: drivers/media/platform/atmel/atmel-isi.h
+
+MICROCHIP KSZ SERIES ETHERNET SWITCH DRIVER
+M: Woojung Huh <woojung.huh@microchip.com>
+M: UNGLinuxDriver@microchip.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+F: drivers/net/dsa/microchip/*
+F: include/linux/platform_data/microchip-ksz.h
+F: net/dsa/tag_ksz.c
+
+MICROCHIP LAN743X ETHERNET DRIVER
+M: Bryan Whitehead <bryan.whitehead@microchip.com>
+M: UNGLinuxDriver@microchip.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/microchip/lan743x_*
+
+MICROCHIP LCDFB DRIVER
+M: Nicolas Ferre <nicolas.ferre@microchip.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/atmel_lcdfb.c
+F: include/video/atmel_lcdc.h
+
+MICROCHIP MCP16502 PMIC DRIVER
+M: Claudiu Beznea <claudiu.beznea@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt
+F: drivers/regulator/mcp16502.c
+
+MICROCHIP MCP3911 ADC DRIVER
+M: Marcus Folkesson <marcus.folkesson@gmail.com>
+M: Kent Gustavsson <kent@minoris.se>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
+F: drivers/iio/adc/mcp3911.c
+
+MICROCHIP MMC/SD/SDIO MCI DRIVER
+M: Ludovic Desroches <ludovic.desroches@microchip.com>
+S: Maintained
+F: drivers/mmc/host/atmel-mci.c
+
+MICROCHIP NAND DRIVER
+M: Tudor Ambarus <tudor.ambarus@microchip.com>
+L: linux-mtd@lists.infradead.org
+S: Supported
+F: Documentation/devicetree/bindings/mtd/atmel-nand.txt
+F: drivers/mtd/nand/raw/atmel/*
+
+MICROCHIP PWM DRIVER
+M: Claudiu Beznea <claudiu.beznea@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-pwm@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pwm/atmel-pwm.txt
+F: drivers/pwm/pwm-atmel.c
+
+MICROCHIP SAMA5D2-COMPATIBLE ADC DRIVER
+M: Eugen Hristev <eugen.hristev@microchip.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/adc/atmel,sama5d2-adc.yaml
+F: drivers/iio/adc/at91-sama5d2_adc.c
+F: include/dt-bindings/iio/adc/at91-sama5d2_adc.h
+
+MICROCHIP SAMA5D2-COMPATIBLE SHUTDOWN CONTROLLER
+M: Claudiu Beznea <claudiu.beznea@microchip.com>
+S: Supported
+F: drivers/power/reset/at91-sama5d2_shdwc.c
+
+MICROCHIP SPI DRIVER
+M: Tudor Ambarus <tudor.ambarus@microchip.com>
+S: Supported
+F: drivers/spi/spi-atmel.*
+
+MICROCHIP SSC DRIVER
+M: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/misc/atmel-ssc.c
+F: include/linux/atmel-ssc.h
+
+MICROCHIP USB251XB DRIVER
+M: Richard Leitner <richard.leitner@skidata.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/usb/usb251xb.txt
+F: drivers/usb/misc/usb251xb.c
+
+MICROCHIP USBA UDC DRIVER
+M: Cristian Birsan <cristian.birsan@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/usb/gadget/udc/atmel_usba_udc.*
+
+MICROCHIP WILC1000 WIFI DRIVER
+M: Ajay Singh <ajay.kathat@microchip.com>
+M: Claudiu Beznea <claudiu.beznea@microchip.com>
+L: linux-wireless@vger.kernel.org
+S: Supported
+F: drivers/net/wireless/microchip/wilc1000/
+
+MICROSEMI MIPS SOCS
+M: Alexandre Belloni <alexandre.belloni@bootlin.com>
+M: UNGLinuxDriver@microchip.com
+L: linux-mips@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mips/mscc.txt
+F: Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
+F: arch/mips/boot/dts/mscc/
+F: arch/mips/configs/generic/board-ocelot.config
+F: arch/mips/generic/board-ocelot.c
+
+MICROSEMI SMART ARRAY SMARTPQI DRIVER (smartpqi)
+M: Don Brace <don.brace@microchip.com>
+L: storagedev@microchip.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: Documentation/scsi/smartpqi.rst
+F: drivers/scsi/smartpqi/Kconfig
+F: drivers/scsi/smartpqi/Makefile
+F: drivers/scsi/smartpqi/smartpqi*.[ch]
+F: include/linux/cciss*.h
+F: include/uapi/linux/cciss*.h
+
+MICROSOFT SURFACE BATTERY AND AC DRIVERS
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: linux-pm@vger.kernel.org
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/power/supply/surface_battery.c
+F: drivers/power/supply/surface_charger.c
+
+MICROSOFT SURFACE DTX DRIVER
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/driver-api/surface_aggregator/clients/dtx.rst
+F: drivers/platform/surface/surface_dtx.c
+F: include/uapi/linux/surface_aggregator/dtx.h
+
+MICROSOFT SURFACE GPE LID SUPPORT DRIVER
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/surface/surface_gpe.c
+
+MICROSOFT SURFACE HARDWARE PLATFORM SUPPORT
+M: Hans de Goede <hdegoede@redhat.com>
+M: Mark Gross <mgross@linux.intel.com>
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
+F: drivers/platform/surface/
+
+MICROSOFT SURFACE HID TRANSPORT DRIVER
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: linux-input@vger.kernel.org
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/hid/surface-hid/
+
+MICROSOFT SURFACE HOT-PLUG DRIVER
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/surface/surface_hotplug.c
+
+MICROSOFT SURFACE PLATFORM PROFILE DRIVER
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/surface/surface_platform_profile.c
+
+MICROSOFT SURFACE PRO 3 BUTTON DRIVER
+M: Chen Yu <yu.c.chen@intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Supported
+F: drivers/platform/surface/surfacepro3_button.c
+
+MICROSOFT SURFACE SYSTEM AGGREGATOR SUBSYSTEM
+M: Maximilian Luz <luzmaximilian@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: https://github.com/linux-surface/surface-aggregator-module
+C: irc://irc.libera.chat/linux-surface
+F: Documentation/driver-api/surface_aggregator/
+F: drivers/platform/surface/aggregator/
+F: drivers/platform/surface/surface_acpi_notify.c
+F: drivers/platform/surface/surface_aggregator_cdev.c
+F: drivers/platform/surface/surface_aggregator_registry.c
+F: include/linux/surface_acpi_notify.h
+F: include/linux/surface_aggregator/
+F: include/uapi/linux/surface_aggregator/
+
+MICROTEK X6 SCANNER
+M: Oliver Neukum <oliver@neukum.org>
+S: Maintained
+F: drivers/usb/image/microtek.*
+
+MIKROTIK CRS3XX 98DX3236 BOARD SUPPORT
+M: Luka Kovacic <luka.kovacic@sartura.hr>
+M: Luka Perkov <luka.perkov@sartura.hr>
+S: Maintained
+F: arch/arm/boot/dts/armada-xp-crs305-1g-4s-bit.dts
+F: arch/arm/boot/dts/armada-xp-crs305-1g-4s.dts
+F: arch/arm/boot/dts/armada-xp-crs326-24g-2s-bit.dts
+F: arch/arm/boot/dts/armada-xp-crs326-24g-2s.dts
+F: arch/arm/boot/dts/armada-xp-crs328-4c-20s-4s-bit.dts
+F: arch/arm/boot/dts/armada-xp-crs328-4c-20s-4s.dts
+
+MIPI CCS, SMIA AND SMIA++ IMAGE SENSOR DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/mipi-ccs.yaml
+F: Documentation/driver-api/media/drivers/ccs/
+F: Documentation/userspace-api/media/drivers/ccs.rst
+F: drivers/media/i2c/ccs-pll.c
+F: drivers/media/i2c/ccs-pll.h
+F: drivers/media/i2c/ccs/
+F: include/uapi/linux/ccs.h
+F: include/uapi/linux/smiapp.h
+
+MIPS
+M: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+L: linux-mips@vger.kernel.org
+S: Maintained
+W: http://www.linux-mips.org/
+Q: https://patchwork.kernel.org/project/linux-mips/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
+F: Documentation/devicetree/bindings/mips/
+F: Documentation/mips/
+F: arch/mips/
+F: drivers/platform/mips/
+
+MIPS BOSTON DEVELOPMENT BOARD
+M: Paul Burton <paulburton@kernel.org>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/clock/img,boston-clock.txt
+F: arch/mips/boot/dts/img/boston.dts
+F: arch/mips/configs/generic/board-boston.config
+F: drivers/clk/imgtec/clk-boston.c
+F: include/dt-bindings/clock/boston-clock.h
+
+MIPS CORE DRIVERS
+M: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+M: Serge Semin <fancer.lancer@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Supported
+F: drivers/bus/mips_cdmm.c
+F: drivers/clocksource/mips-gic-timer.c
+F: drivers/cpuidle/cpuidle-cps.c
+F: drivers/irqchip/irq-mips-cpu.c
+F: drivers/irqchip/irq-mips-gic.c
+
+MIPS GENERIC PLATFORM
+M: Paul Burton <paulburton@kernel.org>
+L: linux-mips@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/power/mti,mips-cpc.yaml
+F: arch/mips/generic/
+F: arch/mips/tools/generic-board-config.sh
+
+MIPS RINT INSTRUCTION EMULATION
+M: Aleksandar Markovic <aleksandar.markovic@mips.com>
+L: linux-mips@vger.kernel.org
+S: Supported
+F: arch/mips/math-emu/dp_rint.c
+F: arch/mips/math-emu/sp_rint.c
+
+MIPS/LOONGSON1 ARCHITECTURE
+M: Keguang Zhang <keguang.zhang@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/include/asm/mach-loongson32/
+F: arch/mips/loongson32/
+F: drivers/*/*/*loongson1*
+F: drivers/*/*loongson1*
+
+MIPS/LOONGSON2EF ARCHITECTURE
+M: Jiaxun Yang <jiaxun.yang@flygoat.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/include/asm/mach-loongson2ef/
+F: arch/mips/loongson2ef/
+F: drivers/cpufreq/loongson2_cpufreq.c
+
+MIPS/LOONGSON64 ARCHITECTURE
+M: Huacai Chen <chenhuacai@kernel.org>
+M: Jiaxun Yang <jiaxun.yang@flygoat.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/include/asm/mach-loongson64/
+F: arch/mips/loongson64/
+F: drivers/irqchip/irq-loongson*
+F: drivers/platform/mips/cpu_hwmon.c
+
+MIROSOUND PCM20 FM RADIO RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-miropcm20*
+
+MMP SUPPORT
+R: Lubomir Rintel <lkundrak@v3.sk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Odd Fixes
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux-mmp.git
+F: arch/arm/boot/dts/mmp*
+F: arch/arm/mach-mmp/
+F: include/linux/soc/mmp/
+
+MMP USB PHY DRIVERS
+R: Lubomir Rintel <lkundrak@v3.sk>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/phy/marvell/phy-mmp3-usb.c
+F: drivers/phy/marvell/phy-pxa-usb.c
+
+MMU GATHER AND TLB INVALIDATION
+M: Will Deacon <will@kernel.org>
+M: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
+M: Andrew Morton <akpm@linux-foundation.org>
+M: Nick Piggin <npiggin@gmail.com>
+M: Peter Zijlstra <peterz@infradead.org>
+L: linux-arch@vger.kernel.org
+L: linux-mm@kvack.org
+S: Maintained
+F: arch/*/include/asm/tlb.h
+F: include/asm-generic/tlb.h
+F: mm/mmu_gather.c
+
+MN88472 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/mn88472*
+
+MN88473 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/mn88473*
+
+MODULE SUPPORT
+M: Luis Chamberlain <mcgrof@kernel.org>
+M: Jessica Yu <jeyu@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git modules-next
+F: include/linux/module.h
+F: kernel/module.c
+
+MONOLITHIC POWER SYSTEM PMIC DRIVER
+M: Saravanan Sekar <sravanhome@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/mps,mp2629.yaml
+F: Documentation/devicetree/bindings/regulator/mps,mp*.yaml
+F: drivers/iio/adc/mp2629_adc.c
+F: drivers/mfd/mp2629.c
+F: drivers/power/supply/mp2629_charger.c
+F: drivers/regulator/mp5416.c
+F: drivers/regulator/mpq7920.c
+F: drivers/regulator/mpq7920.h
+F: include/linux/mfd/mp2629.h
+
+MOTION EYE VAIO PICTUREBOOK CAMERA DRIVER
+S: Orphan
+W: http://popies.net/meye/
+F: Documentation/userspace-api/media/drivers/meye*
+F: drivers/media/pci/meye/
+F: include/uapi/linux/meye.h
+
+MOTORCOMM PHY DRIVER
+M: Peter Geis <pgwipeout@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/phy/motorcomm.c
+
+MOXA SMARTIO/INDUSTIO/INTELLIO SERIAL CARD
+M: Jiri Slaby <jirislaby@kernel.org>
+S: Maintained
+F: Documentation/driver-api/serial/moxa-smartio.rst
+F: drivers/tty/mxser.*
+
+MR800 AVERMEDIA USB FM RADIO DRIVER
+M: Alexey Klimov <klimov.linux@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-mr800.c
+
+MRF24J40 IEEE 802.15.4 RADIO DRIVER
+M: Alan Ott <alan@signal11.us>
+L: linux-wpan@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/ieee802154/mrf24j40.txt
+F: drivers/net/ieee802154/mrf24j40.c
+
+MSI LAPTOP SUPPORT
+M: "Lee, Chun-Yi" <jlee@suse.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/msi-laptop.c
+
+MSI WMI SUPPORT
+L: platform-driver-x86@vger.kernel.org
+S: Orphan
+F: drivers/platform/x86/msi-wmi.c
+
+MSI001 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/msi001*
+
+MSI2500 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/usb/msi2500/
+
+MSTAR INTERRUPT CONTROLLER DRIVER
+M: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
+M: Daniel Palmer <daniel@thingy.jp>
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml
+F: drivers/irqchip/irq-mst-intc.c
+
+MSYSTEMS DISKONCHIP G3 MTD DRIVER
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/devices/docg3*
+
+MT9M032 APTINA SENSOR DRIVER
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/mt9m032.c
+F: include/media/i2c/mt9m032.h
+
+MT9P031 APTINA CAMERA SENSOR
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/mt9p031.c
+F: include/media/i2c/mt9p031.h
+
+MT9T001 APTINA CAMERA SENSOR
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/mt9t001.c
+F: include/media/i2c/mt9t001.h
+
+MT9T112 APTINA CAMERA SENSOR
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/mt9t112.c
+F: include/media/i2c/mt9t112.h
+
+MT9V032 APTINA CAMERA SENSOR
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/mt9v032.txt
+F: drivers/media/i2c/mt9v032.c
+F: include/media/i2c/mt9v032.h
+
+MT9V111 APTINA CAMERA SENSOR
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/aptina,mt9v111.yaml
+F: drivers/media/i2c/mt9v111.c
+
+MULTIFUNCTION DEVICES (MFD)
+M: Lee Jones <lee.jones@linaro.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git
+F: Documentation/devicetree/bindings/mfd/
+F: drivers/mfd/
+F: include/dt-bindings/mfd/
+F: include/linux/mfd/
+
+MULTIMEDIA CARD (MMC) ETC. OVER SPI
+S: Orphan
+F: drivers/mmc/host/mmc_spi.c
+F: include/linux/spi/mmc_spi.h
+
+MULTIMEDIA CARD (MMC), SECURE DIGITAL (SD) AND SDIO SUBSYSTEM
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git
+F: Documentation/devicetree/bindings/mmc/
+F: drivers/mmc/
+F: include/linux/mmc/
+F: include/uapi/linux/mmc/
+
+MULTIPLEXER SUBSYSTEM
+M: Peter Rosin <peda@axentia.se>
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-mux*
+F: Documentation/devicetree/bindings/mux/
+F: drivers/mux/
+F: include/dt-bindings/mux/
+F: include/linux/mux/
+
+MUSB MULTIPOINT HIGH SPEED DUAL-ROLE CONTROLLER
+M: Bin Liu <b-liu@ti.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/musb/
+
+MXL301RF MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/tuners/mxl301rf*
+
+MXL5007T MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/tuners/mxl5007t.*
+
+MXSFB DRM DRIVER
+M: Marek Vasut <marex@denx.de>
+M: Stefan Agner <stefan@agner.ch>
+L: dri-devel@lists.freedesktop.org
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/fsl,lcdif.yaml
+F: drivers/gpu/drm/mxsfb/
+
+MYLEX DAC960 PCI RAID Controller
+M: Hannes Reinecke <hare@kernel.org>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/myrb.*
+F: drivers/scsi/myrs.*
+
+MYRICOM MYRI-10G 10GbE DRIVER (MYRI10GE)
+M: Chris Lee <christopher.lee@cspi.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: https://www.cspi.com/ethernet-products/support/downloads/
+F: drivers/net/ethernet/myricom/myri10ge/
+
+NAND FLASH SUBSYSTEM
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+R: Richard Weinberger <richard@nod.at>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+W: http://www.linux-mtd.infradead.org/
+Q: http://patchwork.ozlabs.org/project/linux-mtd/list/
+C: irc://irc.oftc.net/mtd
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
+F: drivers/mtd/nand/
+F: include/linux/mtd/*nand*.h
+
+NATIVE INSTRUMENTS USB SOUND INTERFACE DRIVER
+M: Daniel Mack <zonque@gmail.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.native-instruments.com
+F: sound/usb/caiaq/
+
+NATSEMI ETHERNET DRIVER (DP8381x)
+S: Orphan
+F: drivers/net/ethernet/natsemi/natsemi.c
+
+NCR 5380 SCSI DRIVERS
+M: Finn Thain <fthain@linux-m68k.org>
+M: Michael Schmitz <schmitzmic@gmail.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: Documentation/scsi/g_NCR5380.rst
+F: drivers/scsi/NCR5380.*
+F: drivers/scsi/arm/cumana_1.c
+F: drivers/scsi/arm/oak.c
+F: drivers/scsi/atari_scsi.*
+F: drivers/scsi/dmx3191d.c
+F: drivers/scsi/g_NCR5380.*
+F: drivers/scsi/mac_scsi.*
+F: drivers/scsi/sun3_scsi.*
+F: drivers/scsi/sun3_scsi_vme.c
+
+NCSI LIBRARY
+M: Samuel Mendoza-Jonas <sam@mendozajonas.com>
+S: Maintained
+F: net/ncsi/
+
+NCT6775 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/nct6775.rst
+F: drivers/hwmon/nct6775.c
+
+NETDEVSIM
+M: Jakub Kicinski <kuba@kernel.org>
+S: Maintained
+F: drivers/net/netdevsim/*
+
+NETEM NETWORK EMULATOR
+M: Stephen Hemminger <stephen@networkplumber.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: net/sched/sch_netem.c
+
+NETERION 10GbE DRIVERS (s2io/vxge)
+M: Jon Mason <jdmason@kudzu.us>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/ethernet/neterion/s2io.rst
+F: Documentation/networking/device_drivers/ethernet/neterion/vxge.rst
+F: drivers/net/ethernet/neterion/
+
+NETFILTER
+M: Pablo Neira Ayuso <pablo@netfilter.org>
+M: Jozsef Kadlecsik <kadlec@netfilter.org>
+M: Florian Westphal <fw@strlen.de>
+L: netfilter-devel@vger.kernel.org
+L: coreteam@netfilter.org
+S: Maintained
+W: http://www.netfilter.org/
+W: http://www.iptables.org/
+W: http://www.nftables.org/
+Q: http://patchwork.ozlabs.org/project/netfilter-devel/list/
+C: irc://irc.libera.chat/netfilter
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git
+F: include/linux/netfilter*
+F: include/linux/netfilter/
+F: include/net/netfilter/
+F: include/uapi/linux/netfilter*
+F: include/uapi/linux/netfilter/
+F: net/*/netfilter.c
+F: net/*/netfilter/
+F: net/bridge/br_netfilter*.c
+F: net/netfilter/
+
+NETROM NETWORK LAYER
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://www.linux-ax25.org/
+F: include/net/netrom.h
+F: include/uapi/linux/netrom.h
+F: net/netrom/
+
+NETRONIX EMBEDDED CONTROLLER
+M: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+S: Maintained
+F: Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
+F: drivers/mfd/ntxec.c
+F: drivers/pwm/pwm-ntxec.c
+F: drivers/rtc/rtc-ntxec.c
+F: include/linux/mfd/ntxec.h
+
+NETRONOME ETHERNET DRIVERS
+M: Simon Horman <simon.horman@corigine.com>
+R: Jakub Kicinski <kuba@kernel.org>
+L: oss-drivers@corigine.com
+S: Maintained
+F: drivers/net/ethernet/netronome/
+
+NETWORK BLOCK DEVICE (NBD)
+M: Josef Bacik <josef@toxicpanda.com>
+L: linux-block@vger.kernel.org
+L: nbd@other.debian.org
+S: Maintained
+F: Documentation/admin-guide/blockdev/nbd.rst
+F: drivers/block/nbd.c
+F: include/trace/events/nbd.h
+F: include/uapi/linux/nbd.h
+
+NETWORK DROP MONITOR
+M: Neil Horman <nhorman@tuxdriver.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: https://fedorahosted.org/dropwatch/
+F: include/uapi/linux/net_dropmon.h
+F: net/core/drop_monitor.c
+
+NETWORKING DRIVERS
+M: "David S. Miller" <davem@davemloft.net>
+M: Jakub Kicinski <kuba@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git
+F: Documentation/devicetree/bindings/net/
+F: drivers/connector/
+F: drivers/net/
+F: include/linux/etherdevice.h
+F: include/linux/fcdevice.h
+F: include/linux/fddidevice.h
+F: include/linux/hippidevice.h
+F: include/linux/if_*
+F: include/linux/inetdevice.h
+F: include/linux/netdevice.h
+F: include/uapi/linux/if_*
+F: include/uapi/linux/netdevice.h
+
+NETWORKING DRIVERS (WIRELESS)
+M: Kalle Valo <kvalo@codeaurora.org>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-wireless/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git
+F: Documentation/devicetree/bindings/net/wireless/
+F: drivers/net/wireless/
+
+NETWORKING [DSA]
+M: Andrew Lunn <andrew@lunn.ch>
+M: Vivien Didelot <vivien.didelot@gmail.com>
+M: Florian Fainelli <f.fainelli@gmail.com>
+M: Vladimir Oltean <olteanv@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/
+F: drivers/net/dsa/
+F: include/linux/dsa/
+F: include/linux/platform_data/dsa.h
+F: include/net/dsa.h
+F: net/dsa/
+
+NETWORKING [GENERAL]
+M: "David S. Miller" <davem@davemloft.net>
+M: Jakub Kicinski <kuba@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/netdevbpf/list/
+B: mailto:netdev@vger.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git
+F: Documentation/networking/
+F: include/linux/in.h
+F: include/linux/net.h
+F: include/linux/netdevice.h
+F: include/net/
+F: include/uapi/linux/in.h
+F: include/uapi/linux/net.h
+F: include/uapi/linux/net_namespace.h
+F: include/uapi/linux/netdevice.h
+F: lib/net_utils.c
+F: lib/random32.c
+F: net/
+F: tools/testing/selftests/net/
+
+NETWORKING [IPSEC]
+M: Steffen Klassert <steffen.klassert@secunet.com>
+M: Herbert Xu <herbert@gondor.apana.org.au>
+M: "David S. Miller" <davem@davemloft.net>
+L: netdev@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git
+F: include/net/xfrm.h
+F: include/uapi/linux/xfrm.h
+F: net/ipv4/ah4.c
+F: net/ipv4/esp4*
+F: net/ipv4/ip_vti.c
+F: net/ipv4/ipcomp.c
+F: net/ipv4/xfrm*
+F: net/ipv6/ah6.c
+F: net/ipv6/esp6*
+F: net/ipv6/ip6_vti.c
+F: net/ipv6/ipcomp6.c
+F: net/ipv6/xfrm*
+F: net/key/
+F: net/xfrm/
+F: tools/testing/selftests/net/ipsec.c
+
+NETWORKING [IPv4/IPv6]
+M: "David S. Miller" <davem@davemloft.net>
+M: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
+M: David Ahern <dsahern@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
+F: arch/x86/net/*
+F: include/net/ip*
+F: net/ipv4/
+F: net/ipv6/
+
+NETWORKING [LABELED] (NetLabel, Labeled IPsec, SECMARK)
+M: Paul Moore <paul@paul-moore.com>
+L: netdev@vger.kernel.org
+L: linux-security-module@vger.kernel.org
+S: Maintained
+W: https://github.com/netlabel
+F: Documentation/netlabel/
+F: include/net/calipso.h
+F: include/net/cipso_ipv4.h
+F: include/net/netlabel.h
+F: include/uapi/linux/netfilter/xt_CONNSECMARK.h
+F: include/uapi/linux/netfilter/xt_SECMARK.h
+F: net/ipv4/cipso_ipv4.c
+F: net/ipv6/calipso.c
+F: net/netfilter/xt_CONNSECMARK.c
+F: net/netfilter/xt_SECMARK.c
+F: net/netlabel/
+
+NETWORKING [MPTCP]
+M: Mat Martineau <mathew.j.martineau@linux.intel.com>
+M: Matthieu Baerts <matthieu.baerts@tessares.net>
+L: netdev@vger.kernel.org
+L: mptcp@lists.linux.dev
+S: Maintained
+W: https://github.com/multipath-tcp/mptcp_net-next/wiki
+B: https://github.com/multipath-tcp/mptcp_net-next/issues
+F: Documentation/networking/mptcp-sysctl.rst
+F: include/net/mptcp.h
+F: include/trace/events/mptcp.h
+F: include/uapi/linux/mptcp.h
+F: net/mptcp/
+F: tools/testing/selftests/net/mptcp/
+
+NETWORKING [TCP]
+M: Eric Dumazet <edumazet@google.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/linux/tcp.h
+F: include/net/tcp.h
+F: include/trace/events/tcp.h
+F: include/uapi/linux/tcp.h
+F: net/ipv4/syncookies.c
+F: net/ipv4/tcp*.c
+F: net/ipv6/syncookies.c
+F: net/ipv6/tcp*.c
+
+NETWORKING [TLS]
+M: Boris Pismenny <borisp@nvidia.com>
+M: John Fastabend <john.fastabend@gmail.com>
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: Jakub Kicinski <kuba@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/net/tls.h
+F: include/uapi/linux/tls.h
+F: net/tls/*
+
+NETWORKING [WIRELESS]
+L: linux-wireless@vger.kernel.org
+Q: http://patchwork.kernel.org/project/linux-wireless/list/
+
+NETXEN (1/10) GbE SUPPORT
+M: Manish Chopra <manishc@marvell.com>
+M: Rahul Verma <rahulv@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/qlogic/netxen/
+
+NET_FAILOVER MODULE
+M: Sridhar Samudrala <sridhar.samudrala@intel.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/net_failover.rst
+F: drivers/net/net_failover.c
+F: include/net/net_failover.h
+
+NEXTHOP
+M: David Ahern <dsahern@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/net/netns/nexthop.h
+F: include/net/nexthop.h
+F: include/uapi/linux/nexthop.h
+F: net/ipv4/nexthop.c
+
+NFC SUBSYSTEM
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-nfc@lists.01.org (subscribers-only)
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/nfc/
+F: drivers/nfc/
+F: include/linux/platform_data/nfcmrvl.h
+F: include/net/nfc/
+F: include/uapi/linux/nfc.h
+F: net/nfc/
+
+NFC VIRTUAL NCI DEVICE DRIVER
+M: Bongsu Jeon <bongsu.jeon@samsung.com>
+L: netdev@vger.kernel.org
+L: linux-nfc@lists.01.org (subscribers-only)
+S: Supported
+F: drivers/nfc/virtual_ncidev.c
+F: tools/testing/selftests/nci/
+
+NFS, SUNRPC, AND LOCKD CLIENTS
+M: Trond Myklebust <trond.myklebust@hammerspace.com>
+M: Anna Schumaker <anna.schumaker@netapp.com>
+L: linux-nfs@vger.kernel.org
+S: Maintained
+W: http://client.linux-nfs.org
+T: git git://git.linux-nfs.org/projects/trondmy/linux-nfs.git
+F: fs/lockd/
+F: fs/nfs/
+F: fs/nfs_common/
+F: include/linux/lockd/
+F: include/linux/nfs*
+F: include/linux/sunrpc/
+F: include/uapi/linux/nfs*
+F: include/uapi/linux/sunrpc/
+F: net/sunrpc/
+F: Documentation/filesystems/nfs/
+
+NILFS2 FILESYSTEM
+M: Ryusuke Konishi <konishi.ryusuke@gmail.com>
+L: linux-nilfs@vger.kernel.org
+S: Supported
+W: https://nilfs.sourceforge.io/
+W: https://nilfs.osdn.jp/
+T: git git://github.com/konis/nilfs2.git
+F: Documentation/filesystems/nilfs2.rst
+F: fs/nilfs2/
+F: include/trace/events/nilfs2.h
+F: include/uapi/linux/nilfs2_api.h
+F: include/uapi/linux/nilfs2_ondisk.h
+
+NINJA SCSI-3 / NINJA SCSI-32Bi (16bit/CardBus) PCMCIA SCSI HOST ADAPTER DRIVER
+M: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
+S: Maintained
+W: http://www.netlab.is.tsukuba.ac.jp/~yokota/izumi/ninja/
+F: Documentation/scsi/NinjaSCSI.rst
+F: drivers/scsi/pcmcia/nsp_*
+
+NINJA SCSI-32Bi/UDE PCI/CARDBUS SCSI HOST ADAPTER DRIVER
+M: GOTO Masanori <gotom@debian.or.jp>
+M: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
+S: Maintained
+W: http://www.netlab.is.tsukuba.ac.jp/~yokota/izumi/ninja/
+F: Documentation/scsi/NinjaSCSI.rst
+F: drivers/scsi/nsp32*
+
+NIOS2 ARCHITECTURE
+M: Dinh Nguyen <dinguyen@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git
+F: arch/nios2/
+
+NITRO ENCLAVES (NE)
+M: Andra Paraschiv <andraprs@amazon.com>
+M: Alexandru Vasile <lexnv@amazon.com>
+M: Alexandru Ciobotaru <alcioa@amazon.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+W: https://aws.amazon.com/ec2/nitro/nitro-enclaves/
+F: Documentation/virt/ne_overview.rst
+F: drivers/virt/nitro_enclaves/
+F: include/linux/nitro_enclaves.h
+F: include/uapi/linux/nitro_enclaves.h
+F: samples/nitro_enclaves/
+
+NOHZ, DYNTICKS SUPPORT
+M: Frederic Weisbecker <fweisbec@gmail.com>
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Ingo Molnar <mingo@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/nohz
+F: include/linux/sched/nohz.h
+F: include/linux/tick.h
+F: kernel/time/tick*.*
+
+NOKIA N900 CAMERA SUPPORT (ET8EK8 SENSOR, AD5820 FOCUS)
+M: Pavel Machek <pavel@ucw.cz>
+M: Sakari Ailus <sakari.ailus@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/ad5820.c
+F: drivers/media/i2c/et8ek8
+
+NOKIA N900 POWER SUPPLY DRIVERS
+R: Pali Rohár <pali@kernel.org>
+F: drivers/power/supply/bq2415x_charger.c
+F: drivers/power/supply/bq27xxx_battery.c
+F: drivers/power/supply/bq27xxx_battery_i2c.c
+F: drivers/power/supply/isp1704_charger.c
+F: drivers/power/supply/rx51_battery.c
+F: include/linux/power/bq2415x_charger.h
+F: include/linux/power/bq27xxx_battery.h
+
+NOLIBC HEADER FILE
+M: Willy Tarreau <w@1wt.eu>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
+F: tools/include/nolibc/
+
+NSDEPS
+M: Matthias Maennich <maennich@google.com>
+S: Maintained
+F: Documentation/core-api/symbol-namespaces.rst
+F: scripts/nsdeps
+
+NTB AMD DRIVER
+M: Sanjay R Mehta <sanju.mehta@amd.com>
+M: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+L: linux-ntb@googlegroups.com
+S: Supported
+F: drivers/ntb/hw/amd/
+
+NTB DRIVER CORE
+M: Jon Mason <jdmason@kudzu.us>
+M: Dave Jiang <dave.jiang@intel.com>
+M: Allen Hubbe <allenbh@gmail.com>
+L: linux-ntb@googlegroups.com
+S: Supported
+W: https://github.com/jonmason/ntb/wiki
+T: git git://github.com/jonmason/ntb.git
+F: drivers/net/ntb_netdev.c
+F: drivers/ntb/
+F: include/linux/ntb.h
+F: include/linux/ntb_transport.h
+F: tools/testing/selftests/ntb/
+
+NTB IDT DRIVER
+M: Serge Semin <fancer.lancer@gmail.com>
+L: linux-ntb@googlegroups.com
+S: Supported
+F: drivers/ntb/hw/idt/
+
+NTB INTEL DRIVER
+M: Dave Jiang <dave.jiang@intel.com>
+L: linux-ntb@googlegroups.com
+S: Supported
+W: https://github.com/davejiang/linux/wiki
+T: git https://github.com/davejiang/linux.git
+F: drivers/ntb/hw/intel/
+
+NTFS FILESYSTEM
+M: Anton Altaparmakov <anton@tuxera.com>
+L: linux-ntfs-dev@lists.sourceforge.net
+S: Supported
+W: http://www.tuxera.com/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/aia21/ntfs.git
+F: Documentation/filesystems/ntfs.rst
+F: fs/ntfs/
+
+NTFS3 FILESYSTEM
+M: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
+L: ntfs3@lists.linux.dev
+S: Supported
+W: http://www.paragon-software.com/
+T: git https://github.com/Paragon-Software-Group/linux-ntfs3.git
+F: Documentation/filesystems/ntfs3.rst
+F: fs/ntfs3/
+
+NUBUS SUBSYSTEM
+M: Finn Thain <fthain@linux-m68k.org>
+L: linux-m68k@lists.linux-m68k.org
+S: Maintained
+F: arch/*/include/asm/nubus.h
+F: drivers/nubus/
+F: include/linux/nubus.h
+F: include/uapi/linux/nubus.h
+
+NVIDIA (rivafb and nvidiafb) FRAMEBUFFER DRIVER
+M: Antonino Daplas <adaplas@gmail.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/nvidia/
+F: drivers/video/fbdev/riva/
+
+NVM EXPRESS DRIVER
+M: Keith Busch <kbusch@kernel.org>
+M: Jens Axboe <axboe@fb.com>
+M: Christoph Hellwig <hch@lst.de>
+M: Sagi Grimberg <sagi@grimberg.me>
+L: linux-nvme@lists.infradead.org
+S: Supported
+W: http://git.infradead.org/nvme.git
+T: git://git.infradead.org/nvme.git
+F: drivers/nvme/host/
+F: include/linux/nvme.h
+F: include/uapi/linux/nvme_ioctl.h
+
+NVM EXPRESS FC TRANSPORT DRIVERS
+M: James Smart <james.smart@broadcom.com>
+L: linux-nvme@lists.infradead.org
+S: Supported
+F: drivers/nvme/host/fc.c
+F: drivers/nvme/target/fc.c
+F: drivers/nvme/target/fcloop.c
+F: include/linux/nvme-fc-driver.h
+F: include/linux/nvme-fc.h
+
+NVM EXPRESS TARGET DRIVER
+M: Christoph Hellwig <hch@lst.de>
+M: Sagi Grimberg <sagi@grimberg.me>
+M: Chaitanya Kulkarni <kch@nvidia.com>
+L: linux-nvme@lists.infradead.org
+S: Supported
+W: http://git.infradead.org/nvme.git
+T: git://git.infradead.org/nvme.git
+F: drivers/nvme/target/
+
+NVMEM FRAMEWORK
+M: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/srini/nvmem.git
+F: Documentation/ABI/stable/sysfs-bus-nvmem
+F: Documentation/devicetree/bindings/nvmem/
+F: drivers/nvmem/
+F: include/linux/nvmem-consumer.h
+F: include/linux/nvmem-provider.h
+
+NXP C45 TJA11XX PHY DRIVER
+M: Radu Pirea <radu-nicolae.pirea@oss.nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/phy/nxp-c45-tja11xx.c
+
+NXP FSPI DRIVER
+M: Ashish Kumar <ashish.kumar@nxp.com>
+R: Yogesh Gaur <yogeshgaur.83@gmail.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
+F: drivers/spi/spi-nxp-fspi.c
+
+NXP FXAS21002C DRIVER
+M: Rui Miguel Silva <rmfrfs@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/gyroscope/nxp,fxas21002c.yaml
+F: drivers/iio/gyro/fxas21002c.h
+F: drivers/iio/gyro/fxas21002c_core.c
+F: drivers/iio/gyro/fxas21002c_i2c.c
+F: drivers/iio/gyro/fxas21002c_spi.c
+
+NXP i.MX CLOCK DRIVERS
+M: Abel Vesa <abel.vesa@nxp.com>
+L: linux-clk@vger.kernel.org
+L: linux-imx@nxp.com
+S: Maintained
+F: drivers/clk/imx/
+
+NXP i.MX 8MQ DCSS DRIVER
+M: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
+R: Lucas Stach <l.stach@pengutronix.de>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/imx/nxp,imx8mq-dcss.yaml
+F: drivers/gpu/drm/imx/dcss/
+
+NXP PF8100/PF8121A/PF8200 PMIC REGULATOR DEVICE DRIVER
+M: Jagan Teki <jagan@amarulasolutions.com>
+S: Maintained
+F: Documentation/devicetree/bindings/regulator/nxp,pf8x00-regulator.yaml
+F: drivers/regulator/pf8x00-regulator.c
+
+NXP PTN5150A CC LOGIC AND EXTCON DRIVER
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/extcon/extcon-ptn5150.yaml
+F: drivers/extcon/extcon-ptn5150.c
+
+NXP SGTL5000 DRIVER
+M: Fabio Estevam <festevam@gmail.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/sgtl5000.yaml
+F: sound/soc/codecs/sgtl5000*
+
+NXP SJA1105 ETHERNET SWITCH DRIVER
+M: Vladimir Oltean <olteanv@gmail.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/net/dsa/sja1105
+F: drivers/net/pcs/pcs-xpcs-nxp.c
+
+NXP TDA998X DRM DRIVER
+M: Russell King <linux@armlinux.org.uk>
+S: Maintained
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git drm-tda998x-devel
+T: git git://git.armlinux.org.uk/~rmk/linux-arm.git drm-tda998x-fixes
+F: drivers/gpu/drm/i2c/tda998x_drv.c
+F: include/drm/i2c/tda998x.h
+F: include/dt-bindings/display/tda998x.h
+K: "nxp,tda998x"
+
+NXP TFA9879 DRIVER
+M: Peter Rosin <peda@axentia.se>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/tfa9879.txt
+F: sound/soc/codecs/tfa9879*
+
+NXP/Goodix TFA989X (TFA1) DRIVER
+M: Stephan Gerhold <stephan@gerhold.net>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/nxp,tfa989x.yaml
+F: sound/soc/codecs/tfa989x.c
+
+NXP-NCI NFC DRIVER
+R: Charles Gorand <charles.gorand@effinnov.com>
+L: linux-nfc@lists.01.org (subscribers-only)
+S: Supported
+F: drivers/nfc/nxp-nci
+
+NXP i.MX 8QXP/8QM JPEG V4L2 DRIVER
+M: Mirela Rabulea <mirela.rabulea@nxp.com>
+R: NXP Linux Team <linux-imx@nxp.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/imx8-jpeg.yaml
+F: drivers/media/platform/imx-jpeg
+
+NZXT-KRAKEN2 HARDWARE MONITORING DRIVER
+M: Jonas Malaco <jonas@protocubo.io>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/nzxt-kraken2.rst
+F: drivers/hwmon/nzxt-kraken2.c
+
+OBJAGG
+M: Jiri Pirko <jiri@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: include/linux/objagg.h
+F: lib/objagg.c
+F: lib/test_objagg.c
+
+OBJTOOL
+M: Josh Poimboeuf <jpoimboe@redhat.com>
+M: Peter Zijlstra <peterz@infradead.org>
+S: Supported
+F: tools/objtool/
+F: include/linux/objtool.h
+
+OCELOT ETHERNET SWITCH DRIVER
+M: Vladimir Oltean <vladimir.oltean@nxp.com>
+M: Claudiu Manoil <claudiu.manoil@nxp.com>
+M: Alexandre Belloni <alexandre.belloni@bootlin.com>
+M: UNGLinuxDriver@microchip.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/dsa/ocelot/*
+F: drivers/net/ethernet/mscc/
+F: include/soc/mscc/ocelot*
+F: net/dsa/tag_ocelot.c
+F: net/dsa/tag_ocelot_8021q.c
+F: tools/testing/selftests/drivers/net/ocelot/*
+
+OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER
+M: Frederic Barrat <fbarrat@linux.ibm.com>
+M: Andrew Donnellan <ajd@linux.ibm.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: Documentation/userspace-api/accelerators/ocxl.rst
+F: arch/powerpc/include/asm/pnv-ocxl.h
+F: arch/powerpc/platforms/powernv/ocxl.c
+F: drivers/misc/ocxl/
+F: include/misc/ocxl*
+F: include/uapi/misc/ocxl.h
+
+OMAP AUDIO SUPPORT
+M: Peter Ujfalusi <peter.ujfalusi@gmail.com>
+M: Jarkko Nikula <jarkko.nikula@bitmer.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: sound/soc/ti/n810.c
+F: sound/soc/ti/omap*
+F: sound/soc/ti/rx51.c
+F: sound/soc/ti/sdma-pcm.*
+
+OMAP CLOCK FRAMEWORK SUPPORT
+M: Paul Walmsley <paul@pwsan.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/*omap*/*clock*
+
+OMAP DEVICE TREE SUPPORT
+M: Benoît Cousson <bcousson@baylibre.com>
+M: Tony Lindgren <tony@atomide.com>
+L: linux-omap@vger.kernel.org
+L: devicetree@vger.kernel.org
+S: Maintained
+F: arch/arm/boot/dts/*am3*
+F: arch/arm/boot/dts/*am4*
+F: arch/arm/boot/dts/*am5*
+F: arch/arm/boot/dts/*dra7*
+F: arch/arm/boot/dts/*omap*
+F: arch/arm/boot/dts/logicpd-som-lv*
+F: arch/arm/boot/dts/logicpd-torpedo*
+
+OMAP DISPLAY SUBSYSTEM and FRAMEBUFFER SUPPORT (DSS2)
+L: linux-omap@vger.kernel.org
+L: linux-fbdev@vger.kernel.org
+S: Orphan
+F: Documentation/arm/omap/dss.rst
+F: drivers/video/fbdev/omap2/
+
+OMAP FRAMEBUFFER SUPPORT
+L: linux-fbdev@vger.kernel.org
+L: linux-omap@vger.kernel.org
+S: Orphan
+F: drivers/video/fbdev/omap/
+
+OMAP GENERAL PURPOSE MEMORY CONTROLLER SUPPORT
+M: Roger Quadros <rogerq@kernel.org>
+M: Tony Lindgren <tony@atomide.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/mach-omap2/*gpmc*
+F: drivers/memory/omap-gpmc.c
+
+OMAP GPIO DRIVER
+M: Grygorii Strashko <grygorii.strashko@ti.com>
+M: Santosh Shilimkar <ssantosh@kernel.org>
+M: Kevin Hilman <khilman@kernel.org>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/ti,omap-gpio.yaml
+F: drivers/gpio/gpio-omap.c
+
+OMAP HARDWARE SPINLOCK SUPPORT
+M: Ohad Ben-Cohen <ohad@wizery.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: drivers/hwspinlock/omap_hwspinlock.c
+
+OMAP HS MMC SUPPORT
+L: linux-mmc@vger.kernel.org
+L: linux-omap@vger.kernel.org
+S: Orphan
+F: drivers/mmc/host/omap_hsmmc.c
+
+OMAP HWMOD DATA
+M: Paul Walmsley <paul@pwsan.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/mach-omap2/omap_hwmod*data*
+
+OMAP HWMOD SUPPORT
+M: Benoît Cousson <bcousson@baylibre.com>
+M: Paul Walmsley <paul@pwsan.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/mach-omap2/omap_hwmod.*
+
+OMAP I2C DRIVER
+M: Vignesh R <vigneshr@ti.com>
+L: linux-omap@vger.kernel.org
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/ti,omap4-i2c.yaml
+F: drivers/i2c/busses/i2c-omap.c
+
+OMAP IMAGING SUBSYSTEM (OMAP3 ISP and OMAP4 ISS)
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/ti,omap3isp.txt
+F: drivers/media/platform/omap3isp/
+F: drivers/staging/media/omap4iss/
+
+OMAP MMC SUPPORT
+M: Aaro Koskinen <aaro.koskinen@iki.fi>
+L: linux-omap@vger.kernel.org
+S: Odd Fixes
+F: drivers/mmc/host/omap.c
+
+OMAP POWER MANAGEMENT SUPPORT
+M: Kevin Hilman <khilman@kernel.org>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/*omap*/*pm*
+F: drivers/cpufreq/omap-cpufreq.c
+
+OMAP POWERDOMAIN SOC ADAPTATION LAYER SUPPORT
+M: Rajendra Nayak <rnayak@codeaurora.org>
+M: Paul Walmsley <paul@pwsan.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/mach-omap2/prm*
+
+OMAP RANDOM NUMBER GENERATOR SUPPORT
+M: Deepak Saxena <dsaxena@plexity.net>
+S: Maintained
+F: drivers/char/hw_random/omap-rng.c
+
+OMAP USB SUPPORT
+L: linux-usb@vger.kernel.org
+L: linux-omap@vger.kernel.org
+S: Orphan
+F: arch/arm/*omap*/usb*
+F: drivers/usb/*/*omap*
+
+OMAP/NEWFLOW NANOBONE MACHINE SUPPORT
+M: Mark Jackson <mpfj@newflow.co.uk>
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: arch/arm/boot/dts/am335x-nano.dts
+
+OMAP1 SUPPORT
+M: Aaro Koskinen <aaro.koskinen@iki.fi>
+M: Tony Lindgren <tony@atomide.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-omap/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git
+F: arch/arm/configs/omap1_defconfig
+F: arch/arm/mach-omap1/
+F: arch/arm/plat-omap/
+F: drivers/i2c/busses/i2c-omap.c
+F: include/linux/platform_data/ams-delta-fiq.h
+F: include/linux/platform_data/i2c-omap.h
+
+OMAP2+ SUPPORT
+M: Tony Lindgren <tony@atomide.com>
+L: linux-omap@vger.kernel.org
+S: Maintained
+W: http://www.muru.com/linux/omap/
+W: http://linux.omap.com/
+Q: http://patchwork.kernel.org/project/linux-omap/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git
+F: arch/arm/configs/omap2plus_defconfig
+F: arch/arm/mach-omap2/
+F: arch/arm/plat-omap/
+F: drivers/bus/ti-sysc.c
+F: drivers/i2c/busses/i2c-omap.c
+F: drivers/irqchip/irq-omap-intc.c
+F: drivers/mfd/*omap*.c
+F: drivers/mfd/menelaus.c
+F: drivers/mfd/palmas.c
+F: drivers/mfd/tps65217.c
+F: drivers/mfd/tps65218.c
+F: drivers/mfd/tps65910.c
+F: drivers/mfd/twl-core.[ch]
+F: drivers/mfd/twl4030*.c
+F: drivers/mfd/twl6030*.c
+F: drivers/mfd/twl6040*.c
+F: drivers/regulator/palmas-regulator*.c
+F: drivers/regulator/pbias-regulator.c
+F: drivers/regulator/tps65217-regulator.c
+F: drivers/regulator/tps65218-regulator.c
+F: drivers/regulator/tps65910-regulator.c
+F: drivers/regulator/twl-regulator.c
+F: drivers/regulator/twl6030-regulator.c
+F: include/linux/platform_data/i2c-omap.h
+F: include/linux/platform_data/ti-sysc.h
+
+OMFS FILESYSTEM
+M: Bob Copeland <me@bobcopeland.com>
+L: linux-karma-devel@lists.sourceforge.net
+S: Maintained
+F: Documentation/filesystems/omfs.rst
+F: fs/omfs/
+
+OMNIKEY CARDMAN 4000 DRIVER
+M: Harald Welte <laforge@gnumonks.org>
+S: Maintained
+F: drivers/char/pcmcia/cm4000_cs.c
+F: include/linux/cm4000_cs.h
+F: include/uapi/linux/cm4000_cs.h
+
+OMNIKEY CARDMAN 4040 DRIVER
+M: Harald Welte <laforge@gnumonks.org>
+S: Maintained
+F: drivers/char/pcmcia/cm4040_cs.*
+
+OMNIVISION OV02A10 SENSOR DRIVER
+M: Dongchun Zhu <dongchun.zhu@mediatek.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov02a10.yaml
+F: drivers/media/i2c/ov02a10.c
+
+OMNIVISION OV13858 SENSOR DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov13858.c
+
+OMNIVISION OV2680 SENSOR DRIVER
+M: Rui Miguel Silva <rmfrfs@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov2680.yaml
+F: drivers/media/i2c/ov2680.c
+
+OMNIVISION OV2685 SENSOR DRIVER
+M: Shunqian Zheng <zhengsq@rock-chips.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov2685.c
+
+OMNIVISION OV2740 SENSOR DRIVER
+M: Tianshu Qiu <tian.shu.qiu@intel.com>
+R: Shawn Tu <shawnx.tu@intel.com>
+R: Bingbu Cao <bingbu.cao@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov2740.c
+
+OMNIVISION OV5640 SENSOR DRIVER
+M: Steve Longerbeam <slongerbeam@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov5640.c
+
+OMNIVISION OV5647 SENSOR DRIVER
+M: Dave Stevenson <dave.stevenson@raspberrypi.com>
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov5647.yaml
+F: drivers/media/i2c/ov5647.c
+
+OMNIVISION OV5670 SENSOR DRIVER
+M: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
+M: Hyungwoo Yang <hyungwoo.yang@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov5670.c
+
+OMNIVISION OV5675 SENSOR DRIVER
+M: Shawn Tu <shawnx.tu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov5675.c
+
+OMNIVISION OV5695 SENSOR DRIVER
+M: Shunqian Zheng <zhengsq@rock-chips.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov5695.c
+
+OMNIVISION OV7670 SENSOR DRIVER
+L: linux-media@vger.kernel.org
+S: Orphan
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ov7670.txt
+F: drivers/media/i2c/ov7670.c
+
+OMNIVISION OV772x SENSOR DRIVER
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov772x.yaml
+F: drivers/media/i2c/ov772x.c
+F: include/media/i2c/ov772x.h
+
+OMNIVISION OV7740 SENSOR DRIVER
+M: Wenyou Yang <wenyou.yang@microchip.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ov7740.txt
+F: drivers/media/i2c/ov7740.c
+
+OMNIVISION OV8856 SENSOR DRIVER
+M: Dongchun Zhu <dongchun.zhu@mediatek.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ov8856.yaml
+F: drivers/media/i2c/ov8856.c
+
+OMNIVISION OV9282 SENSOR DRIVER
+M: Paul J. Murphy <paul.j.murphy@intel.com>
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ovti,ov9282.yaml
+F: drivers/media/i2c/ov9282.c
+
+OMNIVISION OV9640 SENSOR DRIVER
+M: Petr Cvek <petrcvekcz@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/ov9640.*
+
+OMNIVISION OV9650 SENSOR DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+R: Akinobu Mita <akinobu.mita@gmail.com>
+R: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ov9650.txt
+F: drivers/media/i2c/ov9650.c
+
+OMNIVISION OV9734 SENSOR DRIVER
+M: Tianshu Qiu <tian.shu.qiu@intel.com>
+R: Bingbu Cao <bingbu.cao@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/ov9734.c
+
+ONENAND FLASH DRIVER
+M: Kyungmin Park <kyungmin.park@samsung.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/nand/onenand/
+F: include/linux/mtd/onenand*.h
+
+ONION OMEGA2+ BOARD
+M: Harvey Hunt <harveyhuntnexus@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/boot/dts/ralink/omega2p.dts
+
+OP-TEE DRIVER
+M: Jens Wiklander <jens.wiklander@linaro.org>
+L: op-tee@lists.trustedfirmware.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-optee-devices
+F: drivers/tee/optee/
+
+OP-TEE RANDOM NUMBER GENERATOR (RNG) DRIVER
+M: Sumit Garg <sumit.garg@linaro.org>
+L: op-tee@lists.trustedfirmware.org
+S: Maintained
+F: drivers/char/hw_random/optee-rng.c
+
+OPA-VNIC DRIVER
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/ulp/opa_vnic
+
+OPEN FIRMWARE AND DEVICE TREE OVERLAYS
+M: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+M: Frank Rowand <frowand.list@gmail.com>
+L: devicetree@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/dynamic-resolution-notes.rst
+F: Documentation/devicetree/overlay-notes.rst
+F: drivers/of/overlay.c
+F: drivers/of/resolver.c
+K: of_overlay_notifier_
+
+OPEN FIRMWARE AND FLATTENED DEVICE TREE
+M: Rob Herring <robh+dt@kernel.org>
+M: Frank Rowand <frowand.list@gmail.com>
+L: devicetree@vger.kernel.org
+S: Maintained
+W: http://www.devicetree.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
+F: Documentation/ABI/testing/sysfs-firmware-ofw
+F: drivers/of/
+F: include/linux/of*.h
+F: scripts/dtc/
+
+OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
+M: Rob Herring <robh+dt@kernel.org>
+L: devicetree@vger.kernel.org
+S: Maintained
+Q: http://patchwork.ozlabs.org/project/devicetree-bindings/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
+F: Documentation/devicetree/
+F: arch/*/boot/dts/
+F: include/dt-bindings/
+
+OPENCOMPUTE PTP CLOCK DRIVER
+M: Jonathan Lemon <jonathan.lemon@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/ptp/ptp_ocp.c
+
+OPENCORES I2C BUS DRIVER
+M: Peter Korsgaard <peter@korsgaard.com>
+M: Andrew Lunn <andrew@lunn.ch>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-ocores.txt
+F: Documentation/i2c/busses/i2c-ocores.rst
+F: drivers/i2c/busses/i2c-ocores.c
+F: include/linux/platform_data/i2c-ocores.h
+
+OPENRISC ARCHITECTURE
+M: Jonas Bonn <jonas@southpole.se>
+M: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
+M: Stafford Horne <shorne@gmail.com>
+L: openrisc@lists.librecores.org
+S: Maintained
+W: http://openrisc.io
+T: git git://github.com/openrisc/linux.git
+F: Documentation/devicetree/bindings/openrisc/
+F: Documentation/openrisc/
+F: arch/openrisc/
+F: drivers/irqchip/irq-ompic.c
+F: drivers/irqchip/irq-or1k-*
+
+OPENVSWITCH
+M: Pravin B Shelar <pshelar@ovn.org>
+L: netdev@vger.kernel.org
+L: dev@openvswitch.org
+S: Maintained
+W: http://openvswitch.org
+F: include/uapi/linux/openvswitch.h
+F: net/openvswitch/
+
+OPERATING PERFORMANCE POINTS (OPP)
+M: Viresh Kumar <vireshk@kernel.org>
+M: Nishanth Menon <nm@ti.com>
+M: Stephen Boyd <sboyd@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git
+F: Documentation/devicetree/bindings/opp/
+F: Documentation/power/opp.rst
+F: drivers/opp/
+F: include/linux/pm_opp.h
+
+OPL4 DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: sound/drivers/opl4/
+
+ORACLE CLUSTER FILESYSTEM 2 (OCFS2)
+M: Mark Fasheh <mark@fasheh.com>
+M: Joel Becker <jlbec@evilplan.org>
+M: Joseph Qi <joseph.qi@linux.alibaba.com>
+L: ocfs2-devel@oss.oracle.com (moderated for non-subscribers)
+S: Supported
+W: http://ocfs2.wiki.kernel.org
+F: Documentation/filesystems/dlmfs.rst
+F: Documentation/filesystems/ocfs2.rst
+F: fs/ocfs2/
+
+ORANGEFS FILESYSTEM
+M: Mike Marshall <hubcap@omnibond.com>
+R: Martin Brandenburg <martin@omnibond.com>
+L: devel@lists.orangefs.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux.git
+F: Documentation/filesystems/orangefs.rst
+F: fs/orangefs/
+
+ORINOCO DRIVER
+L: linux-wireless@vger.kernel.org
+S: Orphan
+W: https://wireless.wiki.kernel.org/en/users/Drivers/orinoco
+W: http://www.nongnu.org/orinoco/
+F: drivers/net/wireless/intersil/orinoco/
+
+OV2659 OMNIVISION SENSOR DRIVER
+M: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
+F: drivers/media/i2c/ov2659.c
+F: include/media/i2c/ov2659.h
+
+OVERLAY FILESYSTEM
+M: Miklos Szeredi <miklos@szeredi.hu>
+L: linux-unionfs@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git
+F: Documentation/filesystems/overlayfs.rst
+F: fs/overlayfs/
+
+P54 WIRELESS DRIVER
+M: Christian Lamparter <chunkeey@googlemail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/en/users/Drivers/p54
+F: drivers/net/wireless/intersil/p54/
+
+PACKING
+M: Vladimir Oltean <olteanv@gmail.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/core-api/packing.rst
+F: include/linux/packing.h
+F: lib/packing.c
+
+PADATA PARALLEL EXECUTION MECHANISM
+M: Steffen Klassert <steffen.klassert@secunet.com>
+M: Daniel Jordan <daniel.m.jordan@oracle.com>
+L: linux-crypto@vger.kernel.org
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/core-api/padata.rst
+F: include/linux/padata.h
+F: kernel/padata.c
+
+PAGE POOL
+M: Jesper Dangaard Brouer <hawk@kernel.org>
+M: Ilias Apalodimas <ilias.apalodimas@linaro.org>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/page_pool.rst
+F: include/net/page_pool.h
+F: include/trace/events/page_pool.h
+F: net/core/page_pool.c
+
+PANASONIC LAPTOP ACPI EXTRAS DRIVER
+M: Kenneth Chan <kenneth.t.chan@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/panasonic-laptop.c
+
+PARALLAX PING IIO SENSOR DRIVER
+M: Andreas Klinger <ak@it-klinger.de>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
+F: drivers/iio/proximity/ping.c
+
+PARALLEL LCD/KEYPAD PANEL DRIVER
+M: Willy Tarreau <willy@haproxy.com>
+M: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
+S: Odd Fixes
+F: Documentation/admin-guide/lcd-panel-cgram.rst
+F: drivers/auxdisplay/panel.c
+
+PARALLEL PORT SUBSYSTEM
+M: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
+M: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
+L: linux-parport@lists.infradead.org (subscribers-only)
+S: Maintained
+F: Documentation/driver-api/parport*.rst
+F: drivers/char/ppdev.c
+F: drivers/parport/
+F: include/linux/parport*.h
+F: include/uapi/linux/ppdev.h
+
+PARAVIRT_OPS INTERFACE
+M: Juergen Gross <jgross@suse.com>
+M: Deep Shah <sdeep@vmware.com>
+M: "VMware, Inc." <pv-drivers@vmware.com>
+L: virtualization@lists.linux-foundation.org
+S: Supported
+F: Documentation/virt/paravirt_ops.rst
+F: arch/*/include/asm/paravirt*.h
+F: arch/*/kernel/paravirt*
+F: include/linux/hypervisor.h
+
+PARIDE DRIVERS FOR PARALLEL PORT IDE DEVICES
+M: Tim Waugh <tim@cyberelk.net>
+L: linux-parport@lists.infradead.org (subscribers-only)
+S: Maintained
+F: Documentation/admin-guide/blockdev/paride.rst
+F: drivers/block/paride/
+
+PARISC ARCHITECTURE
+M: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
+M: Helge Deller <deller@gmx.de>
+L: linux-parisc@vger.kernel.org
+S: Maintained
+W: https://parisc.wiki.kernel.org
+Q: http://patchwork.kernel.org/project/linux-parisc/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git
+F: Documentation/parisc/
+F: arch/parisc/
+F: drivers/char/agp/parisc-agp.c
+F: drivers/input/misc/hp_sdc_rtc.c
+F: drivers/input/serio/gscps2.c
+F: drivers/input/serio/hp_sdc*
+F: drivers/parisc/
+F: drivers/parport/parport_gsc.*
+F: drivers/tty/serial/8250/8250_gsc.c
+F: drivers/video/console/sti*
+F: drivers/video/fbdev/sti*
+F: drivers/video/logo/logo_parisc*
+F: include/linux/hp_sdc.h
+
+PARMAN
+M: Jiri Pirko <jiri@nvidia.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: include/linux/parman.h
+F: lib/parman.c
+F: lib/test_parman.c
+
+PC ENGINES APU BOARD DRIVER
+M: Enrico Weigelt, metux IT consult <info@metux.net>
+S: Maintained
+F: drivers/platform/x86/pcengines-apuv2.c
+
+PC87360 HARDWARE MONITORING DRIVER
+M: Jim Cromie <jim.cromie@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/pc87360.rst
+F: drivers/hwmon/pc87360.c
+
+PC8736x GPIO DRIVER
+M: Jim Cromie <jim.cromie@gmail.com>
+S: Maintained
+F: drivers/char/pc8736x_gpio.c
+
+PC87427 HARDWARE MONITORING DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/pc87427.rst
+F: drivers/hwmon/pc87427.c
+
+PCA9532 LED DRIVER
+M: Riku Voipio <riku.voipio@iki.fi>
+S: Maintained
+F: drivers/leds/leds-pca9532.c
+F: include/linux/leds-pca9532.h
+
+PCA9541 I2C BUS MASTER SELECTOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/muxes/i2c-mux-pca9541.c
+
+PCDP - PRIMARY CONSOLE AND DEBUG PORT
+M: Khalid Aziz <khalid@gonehiking.org>
+S: Maintained
+F: drivers/firmware/pcdp.*
+
+PCI DRIVER FOR AARDVARK (Marvell Armada 3700)
+M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+M: Pali Rohár <pali@kernel.org>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/aardvark-pci.txt
+F: drivers/pci/controller/pci-aardvark.c
+
+PCI DRIVER FOR ALTERA PCIE IP
+M: Joyce Ooi <joyce.ooi@intel.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/altera-pcie.txt
+F: drivers/pci/controller/pcie-altera.c
+
+PCI DRIVER FOR APPLIEDMICRO XGENE
+M: Toan Le <toan@os.amperecomputing.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/xgene-pci.txt
+F: drivers/pci/controller/pci-xgene.c
+
+PCI DRIVER FOR ARM VERSATILE PLATFORM
+M: Rob Herring <robh@kernel.org>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/versatile.yaml
+F: drivers/pci/controller/pci-versatile.c
+
+PCI DRIVER FOR ARMADA 8K
+M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/pci-armada8k.txt
+F: drivers/pci/controller/dwc/pcie-armada8k.c
+
+PCI DRIVER FOR CADENCE PCIE IP
+M: Tom Joseph <tjoseph@cadence.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/cdns,*
+F: drivers/pci/controller/cadence/
+
+PCI DRIVER FOR FREESCALE LAYERSCAPE
+M: Minghuan Lian <minghuan.Lian@nxp.com>
+M: Mingkai Hu <mingkai.hu@nxp.com>
+M: Roy Zang <roy.zang@nxp.com>
+L: linuxppc-dev@lists.ozlabs.org
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/pci/controller/dwc/*layerscape*
+
+PCI DRIVER FOR GENERIC OF HOSTS
+M: Will Deacon <will@kernel.org>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/host-generic-pci.yaml
+F: drivers/pci/controller/pci-host-common.c
+F: drivers/pci/controller/pci-host-generic.c
+
+PCI DRIVER FOR IMX6
+M: Richard Zhu <hongxing.zhu@nxp.com>
+M: Lucas Stach <l.stach@pengutronix.de>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
+F: drivers/pci/controller/dwc/*imx6*
+
+PCI DRIVER FOR FU740
+M: Paul Walmsley <paul.walmsley@sifive.com>
+M: Greentime Hu <greentime.hu@sifive.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml
+F: drivers/pci/controller/dwc/pcie-fu740.c
+
+PCI DRIVER FOR INTEL IXP4XX
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+F: Documentation/devicetree/bindings/pci/intel,ixp4xx-pci.yaml
+F: drivers/pci/controller/pci-ixp4xx.c
+
+PCI DRIVER FOR INTEL VOLUME MANAGEMENT DEVICE (VMD)
+M: Nirmal Patel <nirmal.patel@linux.intel.com>
+R: Jonathan Derrick <jonathan.derrick@linux.dev>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: drivers/pci/controller/vmd.c
+
+PCI DRIVER FOR MICROSEMI SWITCHTEC
+M: Kurt Schwemmer <kurt.schwemmer@microsemi.com>
+M: Logan Gunthorpe <logang@deltatee.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-switchtec
+F: Documentation/driver-api/switchtec.rst
+F: drivers/ntb/hw/mscc/
+F: drivers/pci/switch/switchtec*
+F: include/linux/switchtec.h
+F: include/uapi/linux/switchtec_ioctl.h
+
+PCI DRIVER FOR MOBIVEIL PCIE IP
+M: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in>
+M: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
+F: drivers/pci/controller/mobiveil/pcie-mobiveil*
+
+PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
+M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/pci/controller/*mvebu*
+
+PCI DRIVER FOR NVIDIA TEGRA
+M: Thierry Reding <thierry.reding@gmail.com>
+L: linux-tegra@vger.kernel.org
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
+F: drivers/pci/controller/pci-tegra.c
+
+PCI DRIVER FOR NXP LAYERSCAPE GEN4 CONTROLLER
+M: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/layerscape-pcie-gen4.txt
+F: drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
+
+PCI DRIVER FOR RENESAS R-CAR
+M: Marek Vasut <marek.vasut+renesas@gmail.com>
+M: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
+L: linux-pci@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/*rcar*
+F: drivers/pci/controller/*rcar*
+
+PCI DRIVER FOR SAMSUNG EXYNOS
+M: Jingoo Han <jingoohan1@gmail.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: drivers/pci/controller/dwc/pci-exynos.c
+
+PCI DRIVER FOR SYNOPSYS DESIGNWARE
+M: Jingoo Han <jingoohan1@gmail.com>
+M: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
+F: Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
+F: drivers/pci/controller/dwc/*designware*
+
+PCI DRIVER FOR TI DRA7XX/J721E
+M: Kishon Vijay Abraham I <kishon@ti.com>
+L: linux-omap@vger.kernel.org
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/pci/ti-pci.txt
+F: drivers/pci/controller/cadence/pci-j721e.c
+F: drivers/pci/controller/dwc/pci-dra7xx.c
+
+PCI DRIVER FOR V3 SEMICONDUCTOR V360EPC
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/v3-v360epc-pci.txt
+F: drivers/pci/controller/pci-v3-semi.c
+
+PCI ENDPOINT SUBSYSTEM
+M: Kishon Vijay Abraham I <kishon@ti.com>
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+R: Krzysztof Wilczyński <kw@linux.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/PCI/endpoint/*
+F: Documentation/misc-devices/pci-endpoint-test.rst
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kishon/pci-endpoint.git
+F: drivers/misc/pci_endpoint_test.c
+F: drivers/pci/endpoint/
+F: tools/pci/
+
+PCI ENHANCED ERROR HANDLING (EEH) FOR POWERPC
+M: Russell Currey <ruscur@russell.cc>
+M: Oliver O'Halloran <oohall@gmail.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+F: Documentation/PCI/pci-error-recovery.rst
+F: Documentation/powerpc/eeh-pci-error-recovery.rst
+F: arch/powerpc/include/*/eeh*.h
+F: arch/powerpc/kernel/eeh*.c
+F: arch/powerpc/platforms/*/eeh*.c
+F: drivers/pci/pcie/aer.c
+F: drivers/pci/pcie/dpc.c
+F: drivers/pci/pcie/err.c
+
+PCI ERROR RECOVERY
+M: Linas Vepstas <linasvepstas@gmail.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/PCI/pci-error-recovery.rst
+
+PCI MSI DRIVER FOR ALTERA MSI IP
+M: Joyce Ooi <joyce.ooi@intel.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/altera-pcie-msi.txt
+F: drivers/pci/controller/pcie-altera-msi.c
+
+PCI MSI DRIVER FOR APPLIEDMICRO XGENE
+M: Toan Le <toan@os.amperecomputing.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pci/xgene-pci-msi.txt
+F: drivers/pci/controller/pci-xgene-msi.c
+
+PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+R: Rob Herring <robh@kernel.org>
+R: Krzysztof Wilczyński <kw@linux.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+Q: http://patchwork.ozlabs.org/project/linux-pci/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git/
+F: drivers/pci/controller/
+
+PCI SUBSYSTEM
+M: Bjorn Helgaas <bhelgaas@google.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+Q: http://patchwork.ozlabs.org/project/linux-pci/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git
+F: Documentation/PCI/
+F: Documentation/devicetree/bindings/pci/
+F: arch/x86/kernel/early-quirks.c
+F: arch/x86/kernel/quirks.c
+F: arch/x86/pci/
+F: drivers/acpi/pci*
+F: drivers/pci/
+F: include/asm-generic/pci*
+F: include/linux/of_pci.h
+F: include/linux/pci*
+F: include/uapi/linux/pci*
+F: lib/pci*
+
+PCIE DRIVER FOR AMAZON ANNAPURNA LABS
+M: Jonathan Chocron <jonnyc@amazon.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/pcie-al.txt
+F: drivers/pci/controller/dwc/pcie-al.c
+
+PCIE DRIVER FOR AMLOGIC MESON
+M: Yue Wang <yue.wang@Amlogic.com>
+L: linux-pci@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Maintained
+F: drivers/pci/controller/dwc/pci-meson.c
+
+PCIE DRIVER FOR AXIS ARTPEC
+M: Jesper Nilsson <jesper.nilsson@axis.com>
+L: linux-arm-kernel@axis.com
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/axis,artpec*
+F: drivers/pci/controller/dwc/*artpec*
+
+PCIE DRIVER FOR CAVIUM THUNDERX
+M: Robert Richter <rric@kernel.org>
+L: linux-pci@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Odd Fixes
+F: drivers/pci/controller/pci-thunder-*
+
+PCIE DRIVER FOR HISILICON
+M: Zhou Wang <wangzhou1@hisilicon.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: drivers/pci/controller/dwc/pcie-hisi.c
+
+PCIE DRIVER FOR HISILICON KIRIN
+M: Xiaowei Song <songxiaowei@hisilicon.com>
+M: Binghui Wang <wangbinghui@hisilicon.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
+F: drivers/pci/controller/dwc/pcie-kirin.c
+
+PCIE DRIVER FOR HISILICON STB
+M: Shawn Guo <shawn.guo@linaro.org>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/hisilicon-histb-pcie.txt
+F: drivers/pci/controller/dwc/pcie-histb.c
+
+PCIE DRIVER FOR INTEL KEEM BAY
+M: Srikanth Thokala <srikanth.thokala@intel.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/intel,keembay-pcie*
+F: drivers/pci/controller/dwc/pcie-keembay.c
+
+PCIE DRIVER FOR INTEL LGM GW SOC
+M: Rahul Tanwar <rtanwar@maxlinear.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
+F: drivers/pci/controller/dwc/pcie-intel-gw.c
+
+PCIE DRIVER FOR MEDIATEK
+M: Ryder Lee <ryder.lee@mediatek.com>
+M: Jianjun Wang <jianjun.wang@mediatek.com>
+L: linux-pci@vger.kernel.org
+L: linux-mediatek@lists.infradead.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/mediatek*
+F: drivers/pci/controller/*mediatek*
+
+PCIE DRIVER FOR MICROCHIP
+M: Daire McNamara <daire.mcnamara@microchip.com>
+L: linux-pci@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/pci/microchip*
+F: drivers/pci/controller/*microchip*
+
+PCIE DRIVER FOR QUALCOMM MSM
+M: Stanimir Varbanov <svarbanov@mm-sol.com>
+L: linux-pci@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: drivers/pci/controller/dwc/*qcom*
+
+PCIE DRIVER FOR ROCKCHIP
+M: Shawn Lin <shawn.lin@rock-chips.com>
+L: linux-pci@vger.kernel.org
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/rockchip-pcie*
+F: drivers/pci/controller/pcie-rockchip*
+
+PCIE DRIVER FOR SOCIONEXT UNIPHIER
+M: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/uniphier-pcie*
+F: drivers/pci/controller/dwc/pcie-uniphier*
+
+PCIE DRIVER FOR ST SPEAR13XX
+M: Pratyush Anand <pratyush.anand@gmail.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: drivers/pci/controller/dwc/*spear*
+
+PCMCIA SUBSYSTEM
+M: Dominik Brodowski <linux@dominikbrodowski.net>
+S: Odd Fixes
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia.git
+F: Documentation/pcmcia/
+F: drivers/pcmcia/
+F: include/pcmcia/
+F: tools/pcmcia/
+
+PCNET32 NETWORK DRIVER
+M: Don Fry <pcnet32@frontier.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/amd/pcnet32.c
+
+PCRYPT PARALLEL CRYPTO ENGINE
+M: Steffen Klassert <steffen.klassert@secunet.com>
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: crypto/pcrypt.c
+F: include/crypto/pcrypt.h
+
+PEAQ WMI HOTKEYS DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/peaq-wmi.c
+
+PENSANDO ETHERNET DRIVERS
+M: Shannon Nelson <snelson@pensando.io>
+M: drivers@pensando.io
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/ethernet/pensando/ionic.rst
+F: drivers/net/ethernet/pensando/
+
+PER-CPU MEMORY ALLOCATOR
+M: Dennis Zhou <dennis@kernel.org>
+M: Tejun Heo <tj@kernel.org>
+M: Christoph Lameter <cl@linux.com>
+L: linux-mm@kvack.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git
+F: arch/*/include/asm/percpu.h
+F: include/linux/percpu*.h
+F: lib/percpu*.c
+F: mm/percpu*.c
+
+PER-TASK DELAY ACCOUNTING
+M: Balbir Singh <bsingharora@gmail.com>
+S: Maintained
+F: include/linux/delayacct.h
+F: kernel/delayacct.c
+
+PERFORMANCE EVENTS SUBSYSTEM
+M: Peter Zijlstra <peterz@infradead.org>
+M: Ingo Molnar <mingo@redhat.com>
+M: Arnaldo Carvalho de Melo <acme@kernel.org>
+R: Mark Rutland <mark.rutland@arm.com>
+R: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+R: Jiri Olsa <jolsa@redhat.com>
+R: Namhyung Kim <namhyung@kernel.org>
+L: linux-perf-users@vger.kernel.org
+L: linux-kernel@vger.kernel.org
+S: Supported
+W: https://perf.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core
+F: arch/*/events/*
+F: arch/*/events/*/*
+F: arch/*/include/asm/perf_event.h
+F: arch/*/kernel/*/*/perf_event*.c
+F: arch/*/kernel/*/perf_event*.c
+F: arch/*/kernel/perf_callchain.c
+F: arch/*/kernel/perf_event*.c
+F: include/linux/perf_event.h
+F: include/uapi/linux/perf_event.h
+F: kernel/events/*
+F: tools/lib/perf/
+F: tools/perf/
+
+PERFORMANCE EVENTS TOOLING ARM64
+R: John Garry <john.garry@huawei.com>
+R: Will Deacon <will@kernel.org>
+R: Mathieu Poirier <mathieu.poirier@linaro.org>
+R: Leo Yan <leo.yan@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: tools/build/feature/test-libopencsd.c
+F: tools/perf/arch/arm*/
+F: tools/perf/pmu-events/arch/arm64/
+F: tools/perf/util/arm-spe*
+F: tools/perf/util/cs-etm*
+
+PERSONALITY HANDLING
+M: Christoph Hellwig <hch@infradead.org>
+L: linux-abi-devel@lists.sourceforge.net
+S: Maintained
+F: include/linux/personality.h
+F: include/uapi/linux/personality.h
+
+PHOENIX RC FLIGHT CONTROLLER ADAPTER
+M: Marcus Folkesson <marcus.folkesson@gmail.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/input/devices/pxrc.rst
+F: drivers/input/joystick/pxrc.c
+
+PHONET PROTOCOL
+M: Remi Denis-Courmont <courmisch@gmail.com>
+S: Supported
+F: Documentation/networking/phonet.rst
+F: include/linux/phonet.h
+F: include/net/phonet/
+F: include/uapi/linux/phonet.h
+F: net/phonet/
+
+PHRAM MTD DRIVER
+M: Joern Engel <joern@lazybastard.org>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/devices/phram.c
+
+PICOLCD HID DRIVER
+M: Bruno Prémont <bonbons@linux-vserver.org>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-picolcd*
+
+PIDFD API
+M: Christian Brauner <christian@brauner.io>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git
+F: samples/pidfd/
+F: tools/testing/selftests/clone3/
+F: tools/testing/selftests/pid_namespace/
+F: tools/testing/selftests/pidfd/
+K: (?i)pidfd
+K: (?i)clone3
+K: \b(clone_args|kernel_clone_args)\b
+
+PIN CONTROL SUBSYSTEM
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git
+F: Documentation/devicetree/bindings/pinctrl/
+F: Documentation/driver-api/pin-control.rst
+F: drivers/pinctrl/
+F: include/linux/pinctrl/
+
+PIN CONTROLLER - AMD
+M: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
+M: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+S: Maintained
+F: drivers/pinctrl/pinctrl-amd.c
+
+PIN CONTROLLER - FREESCALE
+M: Dong Aisheng <aisheng.dong@nxp.com>
+M: Fabio Estevam <festevam@gmail.com>
+M: Shawn Guo <shawnguo@kernel.org>
+M: Stefan Agner <stefan@agner.ch>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/fsl,*
+F: drivers/pinctrl/freescale/
+
+PIN CONTROLLER - INTEL
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+M: Andy Shevchenko <andy@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git
+F: drivers/pinctrl/intel/
+
+PIN CONTROLLER - KEEMBAY
+M: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
+S: Supported
+F: drivers/pinctrl/pinctrl-keembay*
+
+PIN CONTROLLER - MEDIATEK
+M: Sean Wang <sean.wang@kernel.org>
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/mediatek,mt65xx-pinctrl.yaml
+F: Documentation/devicetree/bindings/pinctrl/mediatek,mt6797-pinctrl.yaml
+F: Documentation/devicetree/bindings/pinctrl/mediatek,mt7622-pinctrl.yaml
+F: Documentation/devicetree/bindings/pinctrl/mediatek,mt8183-pinctrl.yaml
+F: drivers/pinctrl/mediatek/
+
+PIN CONTROLLER - MICROCHIP AT91
+M: Ludovic Desroches <ludovic.desroches@microchip.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-gpio@vger.kernel.org
+S: Supported
+F: drivers/gpio/gpio-sama5d2-piobu.c
+F: drivers/pinctrl/pinctrl-at91*
+
+PIN CONTROLLER - QUALCOMM
+M: Bjorn Andersson <bjorn.andersson@linaro.org>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/qcom,*.txt
+F: drivers/pinctrl/qcom/
+
+PIN CONTROLLER - RENESAS
+M: Geert Uytterhoeven <geert+renesas@glider.be>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git renesas-pinctrl
+F: Documentation/devicetree/bindings/pinctrl/renesas,*
+F: drivers/pinctrl/renesas/
+
+PIN CONTROLLER - SAMSUNG
+M: Tomasz Figa <tomasz.figa@gmail.com>
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-samsung-soc/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung.git
+F: Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
+F: drivers/pinctrl/samsung/
+F: include/dt-bindings/pinctrl/samsung.h
+
+PIN CONTROLLER - SINGLE
+M: Tony Lindgren <tony@atomide.com>
+M: Haojian Zhuang <haojian.zhuang@linaro.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: drivers/pinctrl/pinctrl-single.c
+
+PIN CONTROLLER - ST SPEAR
+M: Viresh Kumar <vireshk@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.st.com/spear
+F: drivers/pinctrl/spear/
+
+PKTCDVD DRIVER
+M: linux-block@vger.kernel.org
+S: Orphan
+F: drivers/block/pktcdvd.c
+F: include/linux/pktcdvd.h
+F: include/uapi/linux/pktcdvd.h
+
+PLANTOWER PMS7003 AIR POLLUTION SENSOR DRIVER
+M: Tomasz Duszynski <tduszyns@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml
+F: drivers/iio/chemical/pms7003.c
+
+PLDMFW LIBRARY
+M: Jacob Keller <jacob.e.keller@intel.com>
+S: Maintained
+F: Documentation/driver-api/pldmfw/
+F: include/linux/pldmfw.h
+F: lib/pldmfw/
+
+PLX DMA DRIVER
+M: Logan Gunthorpe <logang@deltatee.com>
+S: Maintained
+F: drivers/dma/plx_dma.c
+
+PM6764TR DRIVER
+M: Charles Hsu <hsu.yungteng@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/pm6764tr.rst
+F: drivers/hwmon/pmbus/pm6764tr.c
+
+PM-GRAPH UTILITY
+M: "Todd E Brandt" <todd.e.brandt@linux.intel.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+W: https://01.org/pm-graph
+B: https://bugzilla.kernel.org/buglist.cgi?component=pm-graph&product=Tools
+T: git git://github.com/intel/pm-graph
+F: tools/power/pm-graph
+
+PMBUS HARDWARE MONITORING DRIVERS
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+W: http://hwmon.wiki.kernel.org/
+W: http://www.roeck-us.net/linux/drivers/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git
+F: Documentation/devicetree/bindings/hwmon/ibm,cffps1.txt
+F: Documentation/devicetree/bindings/hwmon/ltc2978.txt
+F: Documentation/devicetree/bindings/hwmon/max31785.txt
+F: Documentation/hwmon/adm1275.rst
+F: Documentation/hwmon/ibm-cffps.rst
+F: Documentation/hwmon/ir35221.rst
+F: Documentation/hwmon/lm25066.rst
+F: Documentation/hwmon/ltc2978.rst
+F: Documentation/hwmon/ltc3815.rst
+F: Documentation/hwmon/max16064.rst
+F: Documentation/hwmon/max20751.rst
+F: Documentation/hwmon/max31785.rst
+F: Documentation/hwmon/max34440.rst
+F: Documentation/hwmon/max8688.rst
+F: Documentation/hwmon/pmbus-core.rst
+F: Documentation/hwmon/pmbus.rst
+F: Documentation/hwmon/tps40422.rst
+F: Documentation/hwmon/ucd9000.rst
+F: Documentation/hwmon/ucd9200.rst
+F: Documentation/hwmon/zl6100.rst
+F: drivers/hwmon/pmbus/
+F: include/linux/pmbus.h
+
+PMC SIERRA MaxRAID DRIVER
+L: linux-scsi@vger.kernel.org
+S: Orphan
+W: http://www.pmc-sierra.com/
+F: drivers/scsi/pmcraid.*
+
+PMC SIERRA PM8001 DRIVER
+M: Jack Wang <jinpu.wang@cloud.ionos.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/pm8001/
+
+PNI RM3100 IIO DRIVER
+M: Song Qiang <songqiang1304521@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.yaml
+F: drivers/iio/magnetometer/rm3100*
+
+PNP SUPPORT
+M: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
+L: linux-acpi@vger.kernel.org
+S: Maintained
+F: drivers/pnp/
+F: include/linux/pnp.h
+
+POSIX CLOCKS and TIMERS
+M: Thomas Gleixner <tglx@linutronix.de>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
+F: fs/timerfd.c
+F: include/linux/time_namespace.h
+F: include/linux/timer*
+F: kernel/time/*timer*
+F: kernel/time/namespace.c
+
+POWER MANAGEMENT CORE
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: drivers/base/power/
+F: drivers/powercap/
+F: include/linux/intel_rapl.h
+F: include/linux/pm.h
+F: include/linux/pm_*
+F: include/linux/powercap.h
+F: kernel/configs/nopm.config
+
+DYNAMIC THERMAL POWER MANAGEMENT (DTPM)
+M: Daniel Lezcano <daniel.lezcano@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: drivers/powercap/dtpm*
+F: include/linux/dtpm.h
+
+POWER STATE COORDINATION INTERFACE (PSCI)
+M: Mark Rutland <mark.rutland@arm.com>
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/firmware/psci/
+F: include/linux/psci.h
+F: include/uapi/linux/psci.h
+
+POWER SUPPLY CLASS/SUBSYSTEM and DRIVERS
+M: Sebastian Reichel <sre@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git
+F: Documentation/ABI/testing/sysfs-class-power
+F: Documentation/devicetree/bindings/power/supply/
+F: drivers/power/supply/
+F: include/linux/power/
+F: include/linux/power_supply.h
+
+POWERNV OPERATOR PANEL LCD DISPLAY DRIVER
+M: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/char/powernv-op-panel.c
+
+PPP OVER ATM (RFC 2364)
+M: Mitchell Blank Jr <mitch@sfgoth.com>
+S: Maintained
+F: include/uapi/linux/atmppp.h
+F: net/atm/pppoatm.c
+
+PPP OVER ETHERNET
+M: Michal Ostrowski <mostrows@earthlink.net>
+S: Maintained
+F: drivers/net/ppp/pppoe.c
+F: drivers/net/ppp/pppox.c
+
+PPP OVER L2TP
+M: James Chapman <jchapman@katalix.com>
+S: Maintained
+F: include/linux/if_pppol2tp.h
+F: include/uapi/linux/if_pppol2tp.h
+F: net/l2tp/l2tp_ppp.c
+
+PPP PROTOCOL DRIVERS AND COMPRESSORS
+M: Paul Mackerras <paulus@samba.org>
+L: linux-ppp@vger.kernel.org
+S: Maintained
+F: drivers/net/ppp/ppp_*
+
+PPS SUPPORT
+M: Rodolfo Giometti <giometti@enneenne.com>
+L: linuxpps@ml.enneenne.com (subscribers-only)
+S: Maintained
+W: http://wiki.enneenne.com/index.php/LinuxPPS_support
+F: Documentation/ABI/testing/sysfs-pps
+F: Documentation/devicetree/bindings/pps/pps-gpio.txt
+F: Documentation/driver-api/pps.rst
+F: drivers/pps/
+F: include/linux/pps*.h
+F: include/uapi/linux/pps.h
+
+PPTP DRIVER
+M: Dmitry Kozlov <xeb@mail.ru>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://sourceforge.net/projects/accel-pptp
+F: drivers/net/ppp/pptp.c
+
+PRESSURE STALL INFORMATION (PSI)
+M: Johannes Weiner <hannes@cmpxchg.org>
+S: Maintained
+F: include/linux/psi*
+F: kernel/sched/psi.c
+
+PRINTK
+M: Petr Mladek <pmladek@suse.com>
+M: Sergey Senozhatsky <senozhatsky@chromium.org>
+R: Steven Rostedt <rostedt@goodmis.org>
+R: John Ogness <john.ogness@linutronix.de>
+S: Maintained
+F: include/linux/printk.h
+F: kernel/printk/
+
+PRINTK INDEXING
+R: Chris Down <chris@chrisdown.name>
+S: Maintained
+F: kernel/printk/index.c
+
+PROC FILESYSTEM
+L: linux-kernel@vger.kernel.org
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: Documentation/filesystems/proc.rst
+F: fs/proc/
+F: include/linux/proc_fs.h
+F: tools/testing/selftests/proc/
+
+PROC SYSCTL
+M: Luis Chamberlain <mcgrof@kernel.org>
+M: Kees Cook <keescook@chromium.org>
+M: Iurii Zaikin <yzaikin@google.com>
+L: linux-kernel@vger.kernel.org
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/proc/proc_sysctl.c
+F: include/linux/sysctl.h
+F: kernel/sysctl-test.c
+F: kernel/sysctl.c
+F: tools/testing/selftests/sysctl/
+
+PS3 NETWORK SUPPORT
+M: Geoff Levand <geoff@infradead.org>
+L: netdev@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/net/ethernet/toshiba/ps3_gelic_net.*
+
+PS3 PLATFORM SUPPORT
+M: Geoff Levand <geoff@infradead.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: arch/powerpc/boot/ps3*
+F: arch/powerpc/include/asm/lv1call.h
+F: arch/powerpc/include/asm/ps3*.h
+F: arch/powerpc/platforms/ps3/
+F: drivers/*/ps3*
+F: drivers/ps3/
+F: drivers/rtc/rtc-ps3.c
+F: drivers/usb/host/*ps3.c
+F: sound/ppc/snd_ps3*
+
+PS3VRAM DRIVER
+M: Jim Paris <jim@jtan.com>
+M: Geoff Levand <geoff@infradead.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/block/ps3vram.c
+
+PSAMPLE PACKET SAMPLING SUPPORT
+M: Yotam Gigi <yotam.gi@gmail.com>
+S: Maintained
+F: include/net/psample.h
+F: include/uapi/linux/psample.h
+F: net/psample
+
+PSTORE FILESYSTEM
+M: Kees Cook <keescook@chromium.org>
+M: Anton Vorontsov <anton@enomsg.org>
+M: Colin Cross <ccross@android.com>
+M: Tony Luck <tony.luck@intel.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore
+F: Documentation/admin-guide/ramoops.rst
+F: Documentation/admin-guide/pstore-blk.rst
+F: Documentation/devicetree/bindings/reserved-memory/ramoops.txt
+F: drivers/acpi/apei/erst.c
+F: drivers/firmware/efi/efi-pstore.c
+F: fs/pstore/
+F: include/linux/pstore*
+K: \b(pstore|ramoops)
+
+PTP HARDWARE CLOCK SUPPORT
+M: Richard Cochran <richardcochran@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://linuxptp.sourceforge.net/
+F: Documentation/ABI/testing/sysfs-ptp
+F: Documentation/driver-api/ptp.rst
+F: drivers/net/phy/dp83640*
+F: drivers/ptp/*
+F: include/linux/ptp_cl*
+
+PTP VIRTUAL CLOCK SUPPORT
+M: Yangbo Lu <yangbo.lu@nxp.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/ptp/ptp_vclock.c
+F: net/ethtool/phc_vclocks.c
+
+PTRACE SUPPORT
+M: Oleg Nesterov <oleg@redhat.com>
+S: Maintained
+F: arch/*/*/ptrace*.c
+F: arch/*/include/asm/ptrace*.h
+F: arch/*/ptrace*.c
+F: include/asm-generic/syscall.h
+F: include/linux/ptrace.h
+F: include/linux/regset.h
+F: include/linux/tracehook.h
+F: include/uapi/linux/ptrace.h
+F: include/uapi/linux/ptrace.h
+F: kernel/ptrace.c
+
+PULSE8-CEC DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/pulse8-cec.rst
+F: drivers/media/cec/usb/pulse8/
+
+PVRUSB2 VIDEO4LINUX DRIVER
+M: Mike Isely <isely@pobox.com>
+L: pvrusb2@isely.net (subscribers-only)
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://www.isely.net/pvrusb2/
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/driver-api/media/drivers/pvrusb2*
+F: drivers/media/usb/pvrusb2/
+
+PWC WEBCAM DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/pwc/*
+F: include/trace/events/pwc.h
+
+PWM FAN DRIVER
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/hwmon/pwm-fan.txt
+F: Documentation/hwmon/pwm-fan.rst
+F: drivers/hwmon/pwm-fan.c
+
+PWM IR Transmitter
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/pwm-ir-tx.c
+
+PWM SUBSYSTEM
+M: Thierry Reding <thierry.reding@gmail.com>
+R: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+M: Lee Jones <lee.jones@linaro.org>
+L: linux-pwm@vger.kernel.org
+S: Maintained
+Q: https://patchwork.ozlabs.org/project/linux-pwm/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm.git
+F: Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
+F: Documentation/devicetree/bindings/pwm/
+F: Documentation/driver-api/pwm.rst
+F: drivers/gpio/gpio-mvebu.c
+F: drivers/pwm/
+F: drivers/video/backlight/pwm_bl.c
+F: include/linux/pwm.h
+F: include/linux/pwm_backlight.h
+K: pwm_(config|apply_state|ops)
+
+PXA GPIO DRIVER
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-pxa.c
+
+PXA MMCI DRIVER
+S: Orphan
+
+PXA RTC DRIVER
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-rtc@vger.kernel.org
+S: Maintained
+
+PXA2xx/PXA3xx SUPPORT
+M: Daniel Mack <daniel@zonque.org>
+M: Haojian Zhuang <haojian.zhuang@gmail.com>
+M: Robert Jarzmik <robert.jarzmik@free.fr>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://github.com/hzhuang1/linux.git
+T: git git://github.com/rjarzmik/linux.git
+F: arch/arm/boot/dts/pxa*
+F: arch/arm/mach-pxa/
+F: drivers/dma/pxa*
+F: drivers/pcmcia/pxa2xx*
+F: drivers/pinctrl/pxa/
+F: drivers/spi/spi-pxa2xx*
+F: drivers/usb/gadget/udc/pxa2*
+F: include/sound/pxa2xx-lib.h
+F: sound/arm/pxa*
+F: sound/soc/pxa/
+
+QAT DRIVER
+M: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
+L: qat-linux@intel.com
+S: Supported
+F: drivers/crypto/qat/
+
+QCOM AUDIO (ASoC) DRIVERS
+M: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+M: Banajit Goswami <bgoswami@codeaurora.org>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+F: sound/soc/codecs/lpass-va-macro.c
+F: sound/soc/codecs/lpass-wsa-macro.*
+F: sound/soc/codecs/msm8916-wcd-analog.c
+F: sound/soc/codecs/msm8916-wcd-digital.c
+F: sound/soc/codecs/wcd9335.*
+F: sound/soc/codecs/wcd934x.c
+F: sound/soc/codecs/wcd-clsh-v2.*
+F: sound/soc/codecs/wsa881x.c
+F: sound/soc/qcom/
+
+QCOM IPA DRIVER
+M: Alex Elder <elder@kernel.org>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ipa/
+
+QEMU MACHINE EMULATOR AND VIRTUALIZER SUPPORT
+M: Gabriel Somlo <somlo@cmu.edu>
+M: "Michael S. Tsirkin" <mst@redhat.com>
+L: qemu-devel@nongnu.org
+S: Maintained
+F: drivers/firmware/qemu_fw_cfg.c
+F: include/uapi/linux/qemu_fw_cfg.h
+
+QIB DRIVER
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/hw/qib/
+
+QLOGIC QL41xxx FCOE DRIVER
+M: Saurav Kashyap <skashyap@marvell.com>
+M: Javed Hasan <jhasan@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/qedf/
+
+QLOGIC QL41xxx ISCSI DRIVER
+M: Nilesh Javali <njavali@marvell.com>
+M: Manish Rangankar <mrangankar@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/qedi/
+
+QLOGIC QL4xxx ETHERNET DRIVER
+M: Ariel Elior <aelior@marvell.com>
+M: GR-everest-linux-l2@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/qlogic/qed/
+F: drivers/net/ethernet/qlogic/qede/
+F: include/linux/qed/
+
+QLOGIC QL4xxx RDMA DRIVER
+M: Michal Kalderon <mkalderon@marvell.com>
+M: Ariel Elior <aelior@marvell.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/hw/qedr/
+F: include/uapi/rdma/qedr-abi.h
+
+QLOGIC QLA1280 SCSI DRIVER
+M: Michael Reed <mdr@sgi.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/qla1280.[ch]
+
+QLOGIC QLA2XXX FC-SCSI DRIVER
+M: Nilesh Javali <njavali@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/qla2xxx/
+
+QLOGIC QLA3XXX NETWORK DRIVER
+M: GR-Linux-NIC-Dev@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/qlogic/qla3xxx.*
+
+QLOGIC QLA4XXX iSCSI DRIVER
+M: Nilesh Javali <njavali@marvell.com>
+M: Manish Rangankar <mrangankar@marvell.com>
+M: GR-QLogic-Storage-Upstream@marvell.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/qla4xxx/
+
+QLOGIC QLCNIC (1/10)Gb ETHERNET DRIVER
+M: Shahed Shaikh <shshaikh@marvell.com>
+M: Manish Chopra <manishc@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/qlogic/qlcnic/
+
+QLOGIC QLGE 10Gb ETHERNET DRIVER
+M: Manish Chopra <manishc@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
+M: Coiby Xu <coiby.xu@gmail.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: Documentation/networking/device_drivers/qlogic/qlge.rst
+F: drivers/staging/qlge/
+
+QM1D1B0004 MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/tuners/qm1d1b0004*
+
+QM1D1C0042 MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/tuners/qm1d1c0042*
+
+QNX4 FILESYSTEM
+M: Anders Larsen <al@alarsen.net>
+S: Maintained
+W: http://www.alarsen.net/linux/qnx4fs/
+F: fs/qnx4/
+F: include/uapi/linux/qnx4_fs.h
+F: include/uapi/linux/qnxtypes.h
+
+QORIQ DPAA2 FSL-MC BUS DRIVER
+M: Stuart Yoder <stuyoder@gmail.com>
+M: Laurentiu Tudor <laurentiu.tudor@nxp.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/stable/sysfs-bus-fsl-mc
+F: Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
+F: Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
+F: drivers/bus/fsl-mc/
+F: include/uapi/linux/fsl_mc.h
+
+QT1010 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/qt1010*
+
+QUALCOMM ATHEROS ATH10K WIRELESS DRIVER
+M: Kalle Valo <kvalo@codeaurora.org>
+L: ath10k@lists.infradead.org
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/ath10k
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
+F: drivers/net/wireless/ath/ath10k/
+
+QUALCOMM ATHEROS ATH11K WIRELESS DRIVER
+M: Kalle Valo <kvalo@codeaurora.org>
+L: ath11k@lists.infradead.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
+F: drivers/net/wireless/ath/ath11k/
+
+QUALCOMM ATHEROS ATH9K WIRELESS DRIVER
+M: ath9k-devel@qca.qualcomm.com
+L: linux-wireless@vger.kernel.org
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/ath9k
+F: drivers/net/wireless/ath/ath9k/
+
+QUALCOMM CAMERA SUBSYSTEM DRIVER
+M: Robert Foss <robert.foss@linaro.org>
+M: Todor Tomov <todor.too@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/media/qcom_camss.rst
+F: Documentation/devicetree/bindings/media/*camss*
+F: drivers/media/platform/qcom/camss/
+
+QUALCOMM CORE POWER REDUCTION (CPR) AVS DRIVER
+M: Niklas Cassel <nks@flawful.org>
+L: linux-pm@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/power/avs/qcom,cpr.txt
+F: drivers/soc/qcom/cpr.c
+
+QUALCOMM CPUFREQ DRIVER MSM8996/APQ8096
+M: Ilia Lin <ilia.lin@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/opp/qcom-nvmem-cpufreq.txt
+F: drivers/cpufreq/qcom-cpufreq-nvmem.c
+
+QUALCOMM CRYPTO DRIVERS
+M: Thara Gopinath <thara.gopinath@linaro.org>
+L: linux-crypto@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: drivers/crypto/qce/
+
+QUALCOMM EMAC GIGABIT ETHERNET DRIVER
+M: Timur Tabi <timur@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/qualcomm/emac/
+
+QUALCOMM ETHQOS ETHERNET DRIVER
+M: Vinod Koul <vkoul@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/qcom,ethqos.txt
+F: drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+
+QUALCOMM GENERIC INTERFACE I2C DRIVER
+M: Akash Asthana <akashast@codeaurora.org>
+M: Mukesh Savaliya <msavaliy@codeaurora.org>
+L: linux-i2c@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Supported
+F: drivers/i2c/busses/i2c-qcom-geni.c
+
+QUALCOMM HEXAGON ARCHITECTURE
+M: Brian Cain <bcain@codeaurora.org>
+L: linux-hexagon@vger.kernel.org
+S: Supported
+F: arch/hexagon/
+
+QUALCOMM HIDMA DRIVER
+M: Sinan Kaya <okaya@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L: linux-arm-msm@vger.kernel.org
+L: dmaengine@vger.kernel.org
+S: Supported
+F: drivers/dma/qcom/hidma*
+
+QUALCOMM I2C CCI DRIVER
+M: Loic Poulain <loic.poulain@linaro.org>
+M: Robert Foss <robert.foss@linaro.org>
+L: linux-i2c@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-qcom-cci.txt
+F: drivers/i2c/busses/i2c-qcom-cci.c
+
+QUALCOMM IOMMU
+M: Rob Clark <robdclark@gmail.com>
+L: iommu@lists.linux-foundation.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: drivers/iommu/arm/arm-smmu/qcom_iommu.c
+
+QUALCOMM IPC ROUTER (QRTR) DRIVER
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: include/trace/events/qrtr.h
+F: include/uapi/linux/qrtr.h
+F: net/qrtr/
+
+QUALCOMM IPCC MAILBOX DRIVER
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-arm-msm@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml
+F: drivers/mailbox/qcom-ipcc.c
+F: include/dt-bindings/mailbox/qcom-ipcc.h
+
+QUALCOMM IPQ4019 USB PHY DRIVER
+M: Robert Marko <robert.marko@sartura.hr>
+M: Luka Perkov <luka.perkov@sartura.hr>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/phy/qcom-usb-ipq4019-phy.yaml
+F: drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c
+
+QUALCOMM IPQ4019 VQMMC REGULATOR DRIVER
+M: Robert Marko <robert.marko@sartura.hr>
+M: Luka Perkov <luka.perkov@sartura.hr>
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/regulator/vqmmc-ipq4019-regulator.yaml
+F: drivers/regulator/vqmmc-ipq4019-regulator.c
+
+QUALCOMM RMNET DRIVER
+M: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
+M: Sean Tranchetti <stranche@codeaurora.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/networking/device_drivers/cellular/qualcomm/rmnet.rst
+F: drivers/net/ethernet/qualcomm/rmnet/
+F: include/linux/if_rmnet.h
+
+QUALCOMM TSENS THERMAL DRIVER
+M: Amit Kucheria <amitk@kernel.org>
+M: Thara Gopinath <thara.gopinath@linaro.org>
+L: linux-pm@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
+F: drivers/thermal/qcom/
+
+QUALCOMM VENUS VIDEO ACCELERATOR DRIVER
+M: Stanimir Varbanov <stanimir.varbanov@linaro.org>
+L: linux-media@vger.kernel.org
+L: linux-arm-msm@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/*venus*
+F: drivers/media/platform/qcom/venus/
+
+QUALCOMM WCN36XX WIRELESS DRIVER
+M: Kalle Valo <kvalo@codeaurora.org>
+L: wcn36xx@lists.infradead.org
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/wcn36xx
+T: git git://github.com/KrasnikovEugene/wcn36xx.git
+F: drivers/net/wireless/ath/wcn36xx/
+
+QUANTENNA QTNFMAC WIRELESS DRIVER
+M: Igor Mitsyanko <imitsyanko@quantenna.com>
+R: Sergey Matyukevich <geomatsi@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/quantenna
+
+RADEON and AMDGPU DRM DRIVERS
+M: Alex Deucher <alexander.deucher@amd.com>
+M: Christian König <christian.koenig@amd.com>
+M: Pan, Xinhui <Xinhui.Pan@amd.com>
+L: amd-gfx@lists.freedesktop.org
+S: Supported
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
+B: https://gitlab.freedesktop.org/drm/amd/-/issues
+C: irc://irc.oftc.net/radeon
+F: drivers/gpu/drm/amd/
+F: drivers/gpu/drm/radeon/
+F: include/uapi/drm/amdgpu_drm.h
+F: include/uapi/drm/radeon_drm.h
+
+RADEON FRAMEBUFFER DISPLAY DRIVER
+M: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/aty/radeon*
+F: include/uapi/linux/radeonfb.h
+
+RADIOSHARK RADIO DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-shark.c
+
+RADIOSHARK2 RADIO DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-shark2.c
+F: drivers/media/radio/radio-tea5777.c
+
+RADOS BLOCK DEVICE (RBD)
+M: Ilya Dryomov <idryomov@gmail.com>
+R: Dongsheng Yang <dongsheng.yang@easystack.cn>
+L: ceph-devel@vger.kernel.org
+S: Supported
+W: http://ceph.com/
+T: git git://github.com/ceph/ceph-client.git
+F: Documentation/ABI/testing/sysfs-bus-rbd
+F: drivers/block/rbd.c
+F: drivers/block/rbd_types.h
+
+RAGE128 FRAMEBUFFER DISPLAY DRIVER
+M: Paul Mackerras <paulus@samba.org>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/aty/aty128fb.c
+
+RAINSHADOW-CEC DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/cec/usb/rainshadow/
+
+RALINK MIPS ARCHITECTURE
+M: John Crispin <john@phrozen.org>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/ralink
+
+RALINK RT2X00 WIRELESS LAN DRIVER
+M: Stanislaw Gruszka <stf_xl@wp.pl>
+M: Helmut Schaa <helmut.schaa@googlemail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/ralink/rt2x00/
+
+RAMDISK RAM BLOCK DEVICE DRIVER
+M: Jens Axboe <axboe@kernel.dk>
+S: Maintained
+F: Documentation/admin-guide/blockdev/ramdisk.rst
+F: drivers/block/brd.c
+
+RANCHU VIRTUAL BOARD FOR MIPS
+M: Miodrag Dinic <miodrag.dinic@mips.com>
+L: linux-mips@vger.kernel.org
+S: Supported
+F: arch/mips/configs/generic/board-ranchu.config
+F: arch/mips/generic/board-ranchu.c
+
+RANDOM NUMBER DRIVER
+M: "Theodore Ts'o" <tytso@mit.edu>
+S: Maintained
+F: drivers/char/random.c
+
+RAPIDIO SUBSYSTEM
+M: Matt Porter <mporter@kernel.crashing.org>
+M: Alexandre Bounine <alex.bou9@gmail.com>
+S: Maintained
+F: drivers/rapidio/
+
+RAS INFRASTRUCTURE
+M: Tony Luck <tony.luck@intel.com>
+M: Borislav Petkov <bp@alien8.de>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/ras.rst
+F: drivers/ras/
+F: include/linux/ras.h
+F: include/ras/ras_event.h
+
+RAYLINK/WEBGEAR 802.11 WIRELESS LAN DRIVER
+L: linux-wireless@vger.kernel.org
+S: Orphan
+F: drivers/net/wireless/ray*
+
+RC-CORE / LIRC FRAMEWORK
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/driver-api/media/rc-core.rst
+F: Documentation/userspace-api/media/rc/
+F: drivers/media/rc/
+F: include/media/rc-map.h
+F: include/media/rc-core.h
+F: include/uapi/linux/lirc.h
+
+RCMM REMOTE CONTROLS DECODER
+M: Patrick Lerda <patrick9876@free.fr>
+S: Maintained
+F: drivers/media/rc/ir-rcmm-decoder.c
+
+RCUTORTURE TEST FRAMEWORK
+M: "Paul E. McKenney" <paulmck@kernel.org>
+M: Josh Triplett <josh@joshtriplett.org>
+R: Steven Rostedt <rostedt@goodmis.org>
+R: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+R: Lai Jiangshan <jiangshanlai@gmail.com>
+L: rcu@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
+F: tools/testing/selftests/rcutorture
+
+RDACM20 Camera Sensor
+M: Jacopo Mondi <jacopo+renesas@jmondi.org>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+M: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+M: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/imi,rdacm2x-gmsl.yaml
+F: drivers/media/i2c/max9271.c
+F: drivers/media/i2c/max9271.h
+F: drivers/media/i2c/rdacm20.c
+
+RDACM21 Camera Sensor
+M: Jacopo Mondi <jacopo+renesas@jmondi.org>
+M: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+M: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+M: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/imi,rdacm2x-gmsl.yaml
+F: drivers/media/i2c/max9271.c
+F: drivers/media/i2c/max9271.h
+F: drivers/media/i2c/rdacm21.c
+
+RDC R-321X SoC
+M: Florian Fainelli <florian@openwrt.org>
+S: Maintained
+
+RDC R6040 FAST ETHERNET DRIVER
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/rdc/r6040.c
+
+RDMAVT - RDMA verbs software
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/sw/rdmavt
+
+RDS - RELIABLE DATAGRAM SOCKETS
+M: Santosh Shilimkar <santosh.shilimkar@oracle.com>
+L: netdev@vger.kernel.org
+L: linux-rdma@vger.kernel.org
+L: rds-devel@oss.oracle.com (moderated for non-subscribers)
+S: Supported
+W: https://oss.oracle.com/projects/rds/
+F: Documentation/networking/rds.rst
+F: net/rds/
+
+RDT - RESOURCE ALLOCATION
+M: Fenghua Yu <fenghua.yu@intel.com>
+M: Reinette Chatre <reinette.chatre@intel.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/x86/resctrl*
+F: arch/x86/include/asm/resctrl.h
+F: arch/x86/kernel/cpu/resctrl/
+F: tools/testing/selftests/resctrl/
+
+READ-COPY UPDATE (RCU)
+M: "Paul E. McKenney" <paulmck@kernel.org>
+M: Josh Triplett <josh@joshtriplett.org>
+R: Steven Rostedt <rostedt@goodmis.org>
+R: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+R: Lai Jiangshan <jiangshanlai@gmail.com>
+R: Joel Fernandes <joel@joelfernandes.org>
+L: rcu@vger.kernel.org
+S: Supported
+W: http://www.rdrop.com/users/paulmck/RCU/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
+F: Documentation/RCU/
+F: include/linux/rcu*
+F: kernel/rcu/
+X: Documentation/RCU/torture.rst
+X: include/linux/srcu*.h
+X: kernel/rcu/srcu*.c
+
+REAL TIME CLOCK (RTC) SUBSYSTEM
+M: Alessandro Zummo <a.zummo@towertech.it>
+M: Alexandre Belloni <alexandre.belloni@bootlin.com>
+L: linux-rtc@vger.kernel.org
+S: Maintained
+Q: http://patchwork.ozlabs.org/project/rtc-linux/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git
+F: Documentation/admin-guide/rtc.rst
+F: Documentation/devicetree/bindings/rtc/
+F: drivers/rtc/
+F: include/linux/platform_data/rtc-*
+F: include/linux/rtc.h
+F: include/linux/rtc/
+F: include/uapi/linux/rtc.h
+F: tools/testing/selftests/rtc/
+
+REALTEK AUDIO CODECS
+M: Oder Chiou <oder_chiou@realtek.com>
+S: Maintained
+F: include/sound/rt*.h
+F: sound/soc/codecs/rt*
+
+REALTEK RTL83xx SMI DSA ROUTER CHIPS
+M: Linus Walleij <linus.walleij@linaro.org>
+S: Maintained
+F: Documentation/devicetree/bindings/net/dsa/realtek-smi.txt
+F: drivers/net/dsa/realtek-smi*
+F: drivers/net/dsa/rtl83*
+
+REALTEK WIRELESS DRIVER (rtlwifi family)
+M: Ping-Ke Shih <pkshih@realtek.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
+F: drivers/net/wireless/realtek/rtlwifi/
+
+REALTEK WIRELESS DRIVER (rtw88)
+M: Yan-Hsuan Chuang <tony0620emma@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/realtek/rtw88/
+
+REDPINE WIRELESS DRIVER
+M: Amitkumar Karwar <amitkarwar@gmail.com>
+M: Siva Rebbagondla <siva8118@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/rsi/
+
+REGISTER MAP ABSTRACTION
+M: Mark Brown <broonie@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
+F: Documentation/devicetree/bindings/regmap/
+F: drivers/base/regmap/
+F: include/linux/regmap.h
+
+REISERFS FILE SYSTEM
+L: reiserfs-devel@vger.kernel.org
+S: Supported
+F: fs/reiserfs/
+
+REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM
+M: Ohad Ben-Cohen <ohad@wizery.com>
+M: Bjorn Andersson <bjorn.andersson@linaro.org>
+M: Mathieu Poirier <mathieu.poirier@linaro.org>
+L: linux-remoteproc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git rproc-next
+F: Documentation/ABI/testing/sysfs-class-remoteproc
+F: Documentation/devicetree/bindings/remoteproc/
+F: Documentation/staging/remoteproc.rst
+F: drivers/remoteproc/
+F: include/linux/remoteproc.h
+F: include/linux/remoteproc/
+
+REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
+M: Ohad Ben-Cohen <ohad@wizery.com>
+M: Bjorn Andersson <bjorn.andersson@linaro.org>
+M: Mathieu Poirier <mathieu.poirier@linaro.org>
+L: linux-remoteproc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git rpmsg-next
+F: Documentation/ABI/testing/sysfs-bus-rpmsg
+F: Documentation/staging/rpmsg.rst
+F: drivers/rpmsg/
+F: include/linux/rpmsg.h
+F: include/linux/rpmsg/
+F: include/uapi/linux/rpmsg.h
+F: samples/rpmsg/
+
+REMOTE PROCESSOR MESSAGING (RPMSG) WWAN CONTROL DRIVER
+M: Stephan Gerhold <stephan@gerhold.net>
+L: netdev@vger.kernel.org
+L: linux-remoteproc@vger.kernel.org
+S: Maintained
+F: drivers/net/wwan/rpmsg_wwan_ctrl.c
+
+RENESAS CLOCK DRIVERS
+M: Geert Uytterhoeven <geert+renesas@glider.be>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git renesas-clk
+F: Documentation/devicetree/bindings/clock/renesas,*
+F: drivers/clk/renesas/
+
+RENESAS EMEV2 I2C DRIVER
+M: Wolfram Sang <wsa+renesas@sang-engineering.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/i2c/renesas,iic-emev2.yaml
+F: drivers/i2c/busses/i2c-emev2.c
+
+RENESAS ETHERNET DRIVERS
+R: Sergey Shtylyov <s.shtylyov@omp.ru>
+L: netdev@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+F: Documentation/devicetree/bindings/net/renesas,*.yaml
+F: drivers/net/ethernet/renesas/
+F: include/linux/sh_eth.h
+
+RENESAS R-CAR GYROADC DRIVER
+M: Marek Vasut <marek.vasut@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/adc/renesas,rcar-gyroadc.yaml
+F: drivers/iio/adc/rcar-gyroadc.c
+
+RENESAS R-CAR I2C DRIVERS
+M: Wolfram Sang <wsa+renesas@sang-engineering.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/i2c/renesas,rcar-i2c.yaml
+F: Documentation/devicetree/bindings/i2c/renesas,rmobile-iic.yaml
+F: drivers/i2c/busses/i2c-rcar.c
+F: drivers/i2c/busses/i2c-sh_mobile.c
+
+RENESAS R-CAR THERMAL DRIVERS
+M: Niklas Söderlund <niklas.soderlund@ragnatech.se>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.yaml
+F: Documentation/devicetree/bindings/thermal/rcar-thermal.yaml
+F: drivers/thermal/rcar_gen3_thermal.c
+F: drivers/thermal/rcar_thermal.c
+
+RENESAS RIIC DRIVER
+M: Chris Brandt <chris.brandt@renesas.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/i2c/renesas,riic.yaml
+F: drivers/i2c/busses/i2c-riic.c
+
+RENESAS USB PHY DRIVER
+M: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
+L: linux-renesas-soc@vger.kernel.org
+S: Maintained
+F: drivers/phy/renesas/phy-rcar-gen3-usb*.c
+
+RENESAS RZ/G2L A/D DRIVER
+M: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
+L: linux-iio@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/adc/renesas,rzg2l-adc.yaml
+F: drivers/iio/adc/rzg2l_adc.c
+
+RESET CONTROLLER FRAMEWORK
+M: Philipp Zabel <p.zabel@pengutronix.de>
+S: Maintained
+T: git git://git.pengutronix.de/git/pza/linux
+F: Documentation/devicetree/bindings/reset/
+F: Documentation/driver-api/reset.rst
+F: drivers/reset/
+F: include/dt-bindings/reset/
+F: include/linux/reset-controller.h
+F: include/linux/reset.h
+F: include/linux/reset/
+K: \b(?:devm_|of_)?reset_control(?:ler_[a-z]+|_[a-z_]+)?\b
+
+RESTARTABLE SEQUENCES SUPPORT
+M: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+M: Peter Zijlstra <peterz@infradead.org>
+M: "Paul E. McKenney" <paulmck@kernel.org>
+M: Boqun Feng <boqun.feng@gmail.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: include/trace/events/rseq.h
+F: include/uapi/linux/rseq.h
+F: kernel/rseq.c
+F: tools/testing/selftests/rseq/
+
+RFKILL
+M: Johannes Berg <johannes@sipsolutions.net>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
+F: Documentation/ABI/stable/sysfs-class-rfkill
+F: Documentation/driver-api/rfkill.rst
+F: include/linux/rfkill.h
+F: include/uapi/linux/rfkill.h
+F: net/rfkill/
+
+RHASHTABLE
+M: Thomas Graf <tgraf@suug.ch>
+M: Herbert Xu <herbert@gondor.apana.org.au>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/linux/rhashtable-types.h
+F: include/linux/rhashtable.h
+F: lib/rhashtable.c
+F: lib/test_rhashtable.c
+
+RICOH R5C592 MEMORYSTICK DRIVER
+M: Maxim Levitsky <maximlevitsky@gmail.com>
+S: Maintained
+F: drivers/memstick/host/r592.*
+
+RICOH SMARTMEDIA/XD DRIVER
+M: Maxim Levitsky <maximlevitsky@gmail.com>
+S: Maintained
+F: drivers/mtd/nand/raw/r852.c
+F: drivers/mtd/nand/raw/r852.h
+
+RISC-V ARCHITECTURE
+M: Paul Walmsley <paul.walmsley@sifive.com>
+M: Palmer Dabbelt <palmer@dabbelt.com>
+M: Albert Ou <aou@eecs.berkeley.edu>
+L: linux-riscv@lists.infradead.org
+S: Supported
+P: Documentation/riscv/patch-acceptance.rst
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git
+F: arch/riscv/
+N: riscv
+K: riscv
+
+RISC-V/MICROCHIP POLARFIRE SOC SUPPORT
+M: Lewis Hanly <lewis.hanly@microchip.com>
+L: linux-riscv@lists.infradead.org
+S: Supported
+F: drivers/mailbox/mailbox-mpfs.c
+F: drivers/soc/microchip/
+F: include/soc/microchip/mpfs.h
+
+RNBD BLOCK DRIVERS
+M: Md. Haris Iqbal <haris.iqbal@ionos.com>
+M: Jack Wang <jinpu.wang@ionos.com>
+L: linux-block@vger.kernel.org
+S: Maintained
+F: drivers/block/rnbd/
+
+ROCCAT DRIVERS
+M: Stefan Achatz <erazor_de@users.sourceforge.net>
+S: Maintained
+W: http://sourceforge.net/projects/roccat/
+F: Documentation/ABI/*/sysfs-driver-hid-roccat*
+F: drivers/hid/hid-roccat*
+F: include/linux/hid-roccat*
+
+ROCKCHIP ISP V1 DRIVER
+M: Helen Koike <helen.koike@collabora.com>
+M: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
+L: linux-media@vger.kernel.org
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+F: Documentation/admin-guide/media/rkisp1.rst
+F: Documentation/devicetree/bindings/media/rockchip-isp1.yaml
+F: Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst
+F: drivers/media/platform/rockchip/rkisp1
+F: include/uapi/linux/rkisp1-config.h
+
+ROCKCHIP RASTER 2D GRAPHIC ACCELERATION UNIT DRIVER
+M: Jacob Chen <jacob-chen@iotwrt.com>
+M: Ezequiel Garcia <ezequiel@collabora.com>
+L: linux-media@vger.kernel.org
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/rockchip-rga.yaml
+F: drivers/media/platform/rockchip/rga/
+
+ROCKCHIP VIDEO DECODER DRIVER
+M: Ezequiel Garcia <ezequiel@collabora.com>
+L: linux-media@vger.kernel.org
+L: linux-rockchip@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/media/rockchip,vdec.yaml
+F: drivers/staging/media/rkvdec/
+
+ROCKER DRIVER
+M: Jiri Pirko <jiri@resnulli.us>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/rocker/
+
+ROCKETPORT EXPRESS/INFINITY DRIVER
+M: Kevin Cernekee <cernekee@gmail.com>
+L: linux-serial@vger.kernel.org
+S: Odd Fixes
+F: drivers/tty/serial/rp2.*
+
+ROHM BD99954 CHARGER IC
+R: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
+L: linux-power@fi.rohmeurope.com
+S: Supported
+F: drivers/power/supply/bd99954-charger.c
+F: drivers/power/supply/bd99954-charger.h
+
+ROHM BH1750 AMBIENT LIGHT SENSOR DRIVER
+M: Tomasz Duszynski <tduszyns@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/iio/light/bh1750.yaml
+F: drivers/iio/light/bh1750.c
+
+ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS
+M: Marek Vasut <marek.vasut+renesas@gmail.com>
+L: linux-kernel@vger.kernel.org
+L: linux-renesas-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/mfd/bd9571mwv.txt
+F: drivers/gpio/gpio-bd9571mwv.c
+F: drivers/mfd/bd9571mwv.c
+F: drivers/regulator/bd9571mwv-regulator.c
+F: include/linux/mfd/bd9571mwv.h
+
+ROHM POWER MANAGEMENT IC DEVICE DRIVERS
+R: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
+L: linux-power@fi.rohmeurope.com
+S: Supported
+F: Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt
+F: Documentation/devicetree/bindings/regulator/rohm,bd70528-regulator.txt
+F: drivers/clk/clk-bd718x7.c
+F: drivers/gpio/gpio-bd70528.c
+F: drivers/gpio/gpio-bd71815.c
+F: drivers/gpio/gpio-bd71828.c
+F: drivers/mfd/rohm-bd70528.c
+F: drivers/mfd/rohm-bd71828.c
+F: drivers/mfd/rohm-bd718x7.c
+F: drivers/mfd/rohm-bd9576.c
+F: drivers/power/supply/bd70528-charger.c
+F: drivers/regulator/bd70528-regulator.c
+F: drivers/regulator/bd71815-regulator.c
+F: drivers/regulator/bd71828-regulator.c
+F: drivers/regulator/bd718x7-regulator.c
+F: drivers/regulator/bd9576-regulator.c
+F: drivers/regulator/rohm-regulator.c
+F: drivers/rtc/rtc-bd70528.c
+F: drivers/watchdog/bd70528_wdt.c
+F: drivers/watchdog/bd9576_wdt.c
+F: include/linux/mfd/rohm-bd70528.h
+F: include/linux/mfd/rohm-bd71815.h
+F: include/linux/mfd/rohm-bd71828.h
+F: include/linux/mfd/rohm-bd718x7.h
+F: include/linux/mfd/rohm-bd957x.h
+F: include/linux/mfd/rohm-generic.h
+F: include/linux/mfd/rohm-shared.h
+
+ROSE NETWORK LAYER
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://www.linux-ax25.org/
+F: include/net/rose.h
+F: include/uapi/linux/rose.h
+F: net/rose/
+
+ROTATION DRIVER FOR ALLWINNER A83T
+M: Jernej Skrabec <jernej.skrabec@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/allwinner,sun8i-a83t-de2-rotate.yaml
+F: drivers/media/platform/sunxi/sun8i-rotate/
+
+RTL2830 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/rtl2830*
+
+RTL2832 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/rtl2832*
+
+RTL2832_SDR MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/rtl2832_sdr*
+
+RTL8180 WIRELESS DRIVER
+L: linux-wireless@vger.kernel.org
+S: Orphan
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
+F: drivers/net/wireless/realtek/rtl818x/rtl8180/
+
+RTL8187 WIRELESS DRIVER
+M: Herton Ronaldo Krzesinski <herton@canonical.com>
+M: Hin-Tak Leung <htl10@users.sourceforge.net>
+M: Larry Finger <Larry.Finger@lwfinger.net>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+W: https://wireless.wiki.kernel.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
+F: drivers/net/wireless/realtek/rtl818x/rtl8187/
+
+RTL8XXXU WIRELESS DRIVER (rtl8xxxu)
+M: Jes Sorensen <Jes.Sorensen@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jes/linux.git rtl8xxxu-devel
+F: drivers/net/wireless/realtek/rtl8xxxu/
+
+RTRS TRANSPORT DRIVERS
+M: Md. Haris Iqbal <haris.iqbal@ionos.com>
+M: Jack Wang <jinpu.wang@ionos.com>
+L: linux-rdma@vger.kernel.org
+S: Maintained
+F: drivers/infiniband/ulp/rtrs/
+
+RXRPC SOCKETS (AF_RXRPC)
+M: David Howells <dhowells@redhat.com>
+M: Marc Dionne <marc.dionne@auristor.com>
+L: linux-afs@lists.infradead.org
+S: Supported
+W: https://www.infradead.org/~dhowells/kafs/
+F: Documentation/networking/rxrpc.rst
+F: include/keys/rxrpc-type.h
+F: include/net/af_rxrpc.h
+F: include/trace/events/rxrpc.h
+F: include/uapi/linux/rxrpc.h
+F: net/rxrpc/
+
+S3 SAVAGE FRAMEBUFFER DRIVER
+M: Antonino Daplas <adaplas@gmail.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/savage/
+
+S390
+M: Heiko Carstens <hca@linux.ibm.com>
+M: Vasily Gorbik <gor@linux.ibm.com>
+M: Christian Borntraeger <borntraeger@de.ibm.com>
+R: Alexander Gordeev <agordeev@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git
+F: Documentation/driver-api/s390-drivers.rst
+F: Documentation/s390/
+F: arch/s390/
+F: drivers/s390/
+
+S390 COMMON I/O LAYER
+M: Vineeth Vijayan <vneethv@linux.ibm.com>
+M: Peter Oberparleiter <oberpar@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/s390/cio/
+
+S390 DASD DRIVER
+M: Stefan Haberland <sth@linux.ibm.com>
+M: Jan Hoeppner <hoeppner@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: block/partitions/ibm.c
+F: drivers/s390/block/dasd*
+F: include/linux/dasd_mod.h
+
+S390 IOMMU (PCI)
+M: Matthew Rosato <mjrosato@linux.ibm.com>
+M: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/iommu/s390-iommu.c
+
+S390 IUCV NETWORK LAYER
+M: Julian Wiedmann <jwi@linux.ibm.com>
+M: Karsten Graul <kgraul@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/s390/net/*iucv*
+F: include/net/iucv/
+F: net/iucv/
+
+S390 NETWORK DRIVERS
+M: Julian Wiedmann <jwi@linux.ibm.com>
+M: Karsten Graul <kgraul@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/s390/net/
+
+S390 PCI SUBSYSTEM
+M: Niklas Schnelle <schnelle@linux.ibm.com>
+M: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: arch/s390/pci/
+F: drivers/pci/hotplug/s390_pci_hpc.c
+F: Documentation/s390/pci.rst
+
+S390 VFIO AP DRIVER
+M: Tony Krowiak <akrowiak@linux.ibm.com>
+M: Halil Pasic <pasic@linux.ibm.com>
+M: Jason Herne <jjherne@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: Documentation/s390/vfio-ap.rst
+F: drivers/s390/crypto/vfio_ap_drv.c
+F: drivers/s390/crypto/vfio_ap_ops.c
+F: drivers/s390/crypto/vfio_ap_private.h
+
+S390 VFIO-CCW DRIVER
+M: Eric Farman <farman@linux.ibm.com>
+M: Matthew Rosato <mjrosato@linux.ibm.com>
+R: Halil Pasic <pasic@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+L: kvm@vger.kernel.org
+S: Supported
+F: Documentation/s390/vfio-ccw.rst
+F: drivers/s390/cio/vfio_ccw*
+F: include/uapi/linux/vfio_ccw.h
+
+S390 VFIO-PCI DRIVER
+M: Matthew Rosato <mjrosato@linux.ibm.com>
+M: Eric Farman <farman@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+L: kvm@vger.kernel.org
+S: Supported
+F: drivers/vfio/pci/vfio_pci_zdev.c
+F: include/uapi/linux/vfio_zdev.h
+
+S390 ZCRYPT DRIVER
+M: Harald Freudenberger <freude@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/s390/crypto/
+
+S390 ZFCP DRIVER
+M: Steffen Maier <maier@linux.ibm.com>
+M: Benjamin Block <bblock@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: drivers/s390/scsi/zfcp_*
+
+S3C ADC BATTERY DRIVER
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-samsung-soc@vger.kernel.org
+S: Odd Fixes
+F: drivers/power/supply/s3c_adc_battery.c
+F: include/linux/s3c_adc_battery.h
+
+S3C24XX SD/MMC Driver
+M: Ben Dooks <ben-linux@fluff.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+F: drivers/mmc/host/s3cmci.*
+
+SAA6588 RDS RECEIVER DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/saa6588*
+
+SAA7134 VIDEO4LINUX DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/driver-api/media/drivers/saa7134*
+F: drivers/media/pci/saa7134/
+
+SAA7146 VIDEO4LINUX-2 DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/common/saa7146/
+F: drivers/media/pci/saa7146/
+F: include/media/drv-intf/saa7146*
+
+SAFESETID SECURITY MODULE
+M: Micah Morton <mortonm@chromium.org>
+S: Supported
+F: Documentation/admin-guide/LSM/SafeSetID.rst
+F: security/safesetid/
+
+SAMSUNG AUDIO (ASoC) DRIVERS
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+F: Documentation/devicetree/bindings/sound/samsung*
+F: sound/soc/samsung/
+
+SAMSUNG EXYNOS PSEUDO RANDOM NUMBER GENERATOR (RNG) DRIVER
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+L: linux-crypto@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/rng/samsung,exynos4-rng.yaml
+F: drivers/crypto/exynos-rng.c
+
+SAMSUNG EXYNOS TRUE RANDOM NUMBER GENERATOR (TRNG) DRIVER
+M: Łukasz Stelmach <l.stelmach@samsung.com>
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
+F: drivers/char/hw_random/exynos-trng.c
+
+SAMSUNG FRAMEBUFFER DRIVER
+M: Jingoo Han <jingoohan1@gmail.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/s3c-fb.c
+
+SAMSUNG INTERCONNECT DRIVERS
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+M: Artur Świgoń <a.swigon@samsung.com>
+L: linux-pm@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Supported
+F: drivers/interconnect/samsung/
+
+SAMSUNG LAPTOP DRIVER
+M: Corentin Chary <corentin.chary@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/samsung-laptop.c
+
+SAMSUNG MULTIFUNCTION PMIC DEVICE DRIVERS
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+L: linux-kernel@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/clock/samsung,s2mps11.txt
+F: Documentation/devicetree/bindings/mfd/samsung,sec-core.txt
+F: Documentation/devicetree/bindings/regulator/samsung,s2m*.txt
+F: Documentation/devicetree/bindings/regulator/samsung,s5m*.txt
+F: drivers/clk/clk-s2mps11.c
+F: drivers/mfd/sec*.c
+F: drivers/regulator/s2m*.c
+F: drivers/regulator/s5m*.c
+F: drivers/rtc/rtc-s5m.c
+F: include/linux/mfd/samsung/
+
+SAMSUNG S3C24XX/S3C64XX SOC SERIES CAMIF DRIVER
+M: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+L: linux-media@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/s3c-camif/
+F: include/media/drv-intf/s3c_camif.h
+
+SAMSUNG S3FWRN5 NFC DRIVER
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Krzysztof Opasiak <k.opasiak@samsung.com>
+L: linux-nfc@lists.01.org (subscribers-only)
+S: Maintained
+F: Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
+F: drivers/nfc/s3fwrn5
+
+SAMSUNG S5C73M3 CAMERA DRIVER
+M: Andrzej Hajda <a.hajda@samsung.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/i2c/s5c73m3/*
+
+SAMSUNG S5K5BAF CAMERA DRIVER
+M: Andrzej Hajda <a.hajda@samsung.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/i2c/s5k5baf.c
+
+SAMSUNG S5P Security SubSystem (SSS) DRIVER
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Vladimir Zapolskiy <vz@mleia.com>
+L: linux-crypto@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/crypto/samsung-slimsss.yaml
+F: Documentation/devicetree/bindings/crypto/samsung-sss.yaml
+F: drivers/crypto/s5p-sss.c
+
+SAMSUNG S5P/EXYNOS4 SOC SERIES CAMERA SUBSYSTEM DRIVERS
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: linux-media@vger.kernel.org
+S: Supported
+Q: https://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/platform/exynos4-is/
+
+SAMSUNG SOC CLOCK DRIVERS
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+M: Tomasz Figa <tomasz.figa@gmail.com>
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-samsung-soc@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/snawrocki/clk.git
+F: Documentation/devicetree/bindings/clock/exynos*.txt
+F: Documentation/devicetree/bindings/clock/samsung,*.yaml
+F: Documentation/devicetree/bindings/clock/samsung,s3c*
+F: Documentation/devicetree/bindings/clock/samsung,s5p*
+F: drivers/clk/samsung/
+F: include/dt-bindings/clock/exynos*.h
+F: include/dt-bindings/clock/s3c*.h
+F: include/dt-bindings/clock/s5p*.h
+F: include/dt-bindings/clock/samsung,*.h
+F: include/linux/clk/samsung.h
+F: include/linux/platform_data/clk-s3c2410.h
+
+SAMSUNG SPI DRIVERS
+M: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+M: Andi Shyti <andi@etezian.org>
+L: linux-spi@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/spi-samsung.txt
+F: drivers/spi/spi-s3c*
+F: include/linux/platform_data/spi-s3c64xx.h
+F: include/linux/spi/s3c24xx-fiq.h
+
+SAMSUNG SXGBE DRIVERS
+M: Byungho An <bh74.an@samsung.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/samsung/sxgbe/
+
+SAMSUNG THERMAL DRIVER
+M: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
+L: linux-pm@vger.kernel.org
+L: linux-samsung-soc@vger.kernel.org
+S: Supported
+T: git https://github.com/lmajewski/linux-samsung-thermal.git
+F: drivers/thermal/samsung/
+
+SAMSUNG USB2 PHY DRIVER
+M: Sylwester Nawrocki <s.nawrocki@samsung.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/phy/samsung-phy.txt
+F: Documentation/driver-api/phy/samsung-usb2.rst
+F: drivers/phy/samsung/phy-exynos4210-usb2.c
+F: drivers/phy/samsung/phy-exynos4x12-usb2.c
+F: drivers/phy/samsung/phy-exynos5250-usb2.c
+F: drivers/phy/samsung/phy-s5pv210-usb2.c
+F: drivers/phy/samsung/phy-samsung-usb2.c
+F: drivers/phy/samsung/phy-samsung-usb2.h
+
+SANCLOUD BEAGLEBONE ENHANCED DEVICE TREE
+M: Paul Barker <paul.barker@sancloud.com>
+R: Marc Murphy <marc.murphy@sancloud.com>
+S: Supported
+F: arch/arm/boot/dts/am335x-sancloud*
+
+SC1200 WDT DRIVER
+M: Zwane Mwaikambo <zwanem@gmail.com>
+S: Maintained
+F: drivers/watchdog/sc1200wdt.c
+
+SCHEDULER
+M: Ingo Molnar <mingo@redhat.com>
+M: Peter Zijlstra <peterz@infradead.org>
+M: Juri Lelli <juri.lelli@redhat.com> (SCHED_DEADLINE)
+M: Vincent Guittot <vincent.guittot@linaro.org> (SCHED_NORMAL)
+R: Dietmar Eggemann <dietmar.eggemann@arm.com> (SCHED_NORMAL)
+R: Steven Rostedt <rostedt@goodmis.org> (SCHED_FIFO/SCHED_RR)
+R: Ben Segall <bsegall@google.com> (CONFIG_CFS_BANDWIDTH)
+R: Mel Gorman <mgorman@suse.de> (CONFIG_NUMA_BALANCING)
+R: Daniel Bristot de Oliveira <bristot@redhat.com> (SCHED_DEADLINE)
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
+F: include/linux/preempt.h
+F: include/linux/sched.h
+F: include/linux/wait.h
+F: include/uapi/linux/sched.h
+F: kernel/sched/
+
+SCR24X CHIP CARD INTERFACE DRIVER
+M: Lubomir Rintel <lkundrak@v3.sk>
+S: Supported
+F: drivers/char/pcmcia/scr24x_cs.c
+
+SCSI RDMA PROTOCOL (SRP) INITIATOR
+M: Bart Van Assche <bvanassche@acm.org>
+L: linux-rdma@vger.kernel.org
+S: Supported
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/ulp/srp/
+F: include/scsi/srp.h
+
+SCSI RDMA PROTOCOL (SRP) TARGET
+M: Bart Van Assche <bvanassche@acm.org>
+L: linux-rdma@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+Q: http://patchwork.kernel.org/project/linux-rdma/list/
+F: drivers/infiniband/ulp/srpt/
+
+SCSI SG DRIVER
+M: Doug Gilbert <dgilbert@interlog.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+W: http://sg.danny.cz/sg
+F: Documentation/scsi/scsi-generic.rst
+F: drivers/scsi/sg.c
+F: include/scsi/sg.h
+
+SCSI SUBSYSTEM
+M: "James E.J. Bottomley" <jejb@linux.ibm.com>
+M: "Martin K. Petersen" <martin.petersen@oracle.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+Q: https://patchwork.kernel.org/project/linux-scsi/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git
+F: Documentation/devicetree/bindings/scsi/
+F: drivers/scsi/
+F: include/scsi/
+
+SCSI TAPE DRIVER
+M: Kai Mäkisara <Kai.Makisara@kolumbus.fi>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: Documentation/scsi/st.rst
+F: drivers/scsi/st.*
+F: drivers/scsi/st_*.h
+
+SCSI TARGET CORE USER DRIVER
+M: Bodo Stroesser <bostroesser@gmail.com>
+L: linux-scsi@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+F: Documentation/target/tcmu-design.rst
+F: drivers/target/target_core_user.c
+F: include/uapi/linux/target_core_user.h
+
+SCSI TARGET SUBSYSTEM
+M: "Martin K. Petersen" <martin.petersen@oracle.com>
+L: linux-scsi@vger.kernel.org
+L: target-devel@vger.kernel.org
+S: Supported
+W: http://www.linux-iscsi.org
+Q: https://patchwork.kernel.org/project/target-devel/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git
+F: Documentation/target/
+F: drivers/target/
+F: include/target/
+
+SCTP PROTOCOL
+M: Vlad Yasevich <vyasevich@gmail.com>
+M: Neil Horman <nhorman@tuxdriver.com>
+M: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
+L: linux-sctp@vger.kernel.org
+S: Maintained
+W: http://lksctp.sourceforge.net
+F: Documentation/networking/sctp.rst
+F: include/linux/sctp.h
+F: include/net/sctp/
+F: include/uapi/linux/sctp.h
+F: net/sctp/
+
+SCx200 CPU SUPPORT
+M: Jim Cromie <jim.cromie@gmail.com>
+S: Odd Fixes
+F: Documentation/i2c/busses/scx200_acb.rst
+F: arch/x86/platform/scx200/
+F: drivers/i2c/busses/scx200*
+F: drivers/mtd/maps/scx200_docflash.c
+F: drivers/watchdog/scx200_wdt.c
+F: include/linux/scx200.h
+
+SCx200 GPIO DRIVER
+M: Jim Cromie <jim.cromie@gmail.com>
+S: Maintained
+F: drivers/char/scx200_gpio.c
+F: include/linux/scx200_gpio.h
+
+SCx200 HRT CLOCKSOURCE DRIVER
+M: Jim Cromie <jim.cromie@gmail.com>
+S: Maintained
+F: drivers/clocksource/scx200_hrt.c
+
+SDRICOH_CS MMC/SD HOST CONTROLLER INTERFACE DRIVER
+M: Sascha Sommer <saschasommer@freenet.de>
+L: sdricohcs-devel@lists.sourceforge.net (subscribers-only)
+S: Maintained
+F: drivers/mmc/host/sdricoh_cs.c
+
+SECO BOARDS CEC DRIVER
+M: Ettore Chimenti <ek5.chimenti@gmail.com>
+S: Maintained
+F: drivers/media/cec/platform/seco/seco-cec.c
+F: drivers/media/cec/platform/seco/seco-cec.h
+
+SECURE COMPUTING
+M: Kees Cook <keescook@chromium.org>
+R: Andy Lutomirski <luto@amacapital.net>
+R: Will Drewry <wad@chromium.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git seccomp
+F: Documentation/userspace-api/seccomp_filter.rst
+F: include/linux/seccomp.h
+F: include/uapi/linux/seccomp.h
+F: kernel/seccomp.c
+F: tools/testing/selftests/kselftest_harness.h
+F: tools/testing/selftests/seccomp/*
+K: \bsecure_computing
+K: \bTIF_SECCOMP\b
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) Broadcom BRCMSTB DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-mmc@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: drivers/mmc/host/sdhci-brcmstb*
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) DRIVER
+M: Adrian Hunter <adrian.hunter@intel.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci*
+F: include/linux/mmc/sdhci*
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) MICROCHIP DRIVER
+M: Eugen Hristev <eugen.hristev@microchip.com>
+L: linux-mmc@vger.kernel.org
+S: Supported
+F: drivers/mmc/host/sdhci-of-at91.c
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) SAMSUNG DRIVER
+M: Ben Dooks <ben-linux@fluff.org>
+M: Jaehoon Chung <jh80.chung@samsung.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci-s3c*
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) ST SPEAR DRIVER
+M: Viresh Kumar <vireshk@kernel.org>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci-spear.c
+
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) TI OMAP DRIVER
+M: Kishon Vijay Abraham I <kishon@ti.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci-omap.c
+
+SECURE ENCRYPTING DEVICE (SED) OPAL DRIVER
+M: Jonathan Derrick <jonathan.derrick@intel.com>
+M: Revanth Rajashekar <revanth.rajashekar@intel.com>
+L: linux-block@vger.kernel.org
+S: Supported
+F: block/opal_proto.h
+F: block/sed*
+F: include/linux/sed*
+F: include/uapi/linux/sed*
+
+SECURITY CONTACT
+M: Security Officers <security@kernel.org>
+S: Supported
+F: Documentation/admin-guide/security-bugs.rst
+
+SECURITY SUBSYSTEM
+M: James Morris <jmorris@namei.org>
+M: "Serge E. Hallyn" <serge@hallyn.com>
+L: linux-security-module@vger.kernel.org (suggested Cc:)
+S: Supported
+W: http://kernsec.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git
+F: security/
+X: security/selinux/
+
+SELINUX SECURITY MODULE
+M: Paul Moore <paul@paul-moore.com>
+M: Stephen Smalley <stephen.smalley.work@gmail.com>
+M: Eric Paris <eparis@parisplace.org>
+L: selinux@vger.kernel.org
+S: Supported
+W: https://selinuxproject.org
+W: https://github.com/SELinuxProject
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git
+F: Documentation/ABI/obsolete/sysfs-selinux-checkreqprot
+F: Documentation/ABI/obsolete/sysfs-selinux-disable
+F: Documentation/admin-guide/LSM/SELinux.rst
+F: include/trace/events/avc.h
+F: include/uapi/linux/selinux_netlink.h
+F: scripts/selinux/
+F: security/selinux/
+
+SENSABLE PHANTOM
+M: Jiri Slaby <jirislaby@kernel.org>
+S: Maintained
+F: drivers/misc/phantom.c
+F: include/uapi/linux/phantom.h
+
+SENSIRION SCD30 CARBON DIOXIDE SENSOR DRIVER
+M: Tomasz Duszynski <tomasz.duszynski@octakon.com>
+S: Maintained
+F: Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml
+F: drivers/iio/chemical/scd30.h
+F: drivers/iio/chemical/scd30_core.c
+F: drivers/iio/chemical/scd30_i2c.c
+F: drivers/iio/chemical/scd30_serial.c
+
+SENSIRION SGP40 GAS SENSOR DRIVER
+M: Andreas Klinger <ak@it-klinger.de>
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-iio-chemical-sgp40
+F: drivers/iio/chemical/sgp40.c
+
+SENSIRION SPS30 AIR POLLUTION SENSOR DRIVER
+M: Tomasz Duszynski <tduszyns@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/iio/chemical/sensirion,sps30.yaml
+F: drivers/iio/chemical/sps30.c
+F: drivers/iio/chemical/sps30_i2c.c
+F: drivers/iio/chemical/sps30_serial.c
+
+SERIAL DEVICE BUS
+M: Rob Herring <robh@kernel.org>
+L: linux-serial@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/serial/serial.yaml
+F: drivers/tty/serdev/
+F: include/linux/serdev.h
+
+SERIAL DRIVERS
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-serial@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/serial/
+F: drivers/tty/serial/
+
+SERIAL IR RECEIVER
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/serial_ir.c
+
+SERIAL LOW-POWER INTER-CHIP MEDIA BUS (SLIMbus)
+M: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/slimbus/
+F: drivers/slimbus/
+F: include/linux/slimbus.h
+
+SFC NETWORK DRIVER
+M: Edward Cree <ecree.xilinx@gmail.com>
+M: Martin Habets <habetsm.xilinx@gmail.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/sfc/
+
+SFF/SFP/SFP+ MODULE SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/phy/phylink.c
+F: drivers/net/phy/sfp*
+F: include/linux/mdio/mdio-i2c.h
+F: include/linux/phylink.h
+F: include/linux/sfp.h
+K: phylink\.h|struct\s+phylink|\.phylink|>phylink_|phylink_(autoneg|clear|connect|create|destroy|disconnect|ethtool|helper|mac|mii|of|set|start|stop|test|validate)
+
+SGI GRU DRIVER
+M: Dimitri Sivanich <dimitri.sivanich@hpe.com>
+S: Maintained
+F: drivers/misc/sgi-gru/
+
+SGI XP/XPC/XPNET DRIVER
+M: Robin Holt <robinmholt@gmail.com>
+M: Steve Wahl <steve.wahl@hpe.com>
+R: Mike Travis <mike.travis@hpe.com>
+S: Maintained
+F: drivers/misc/sgi-xp/
+
+SHARED MEMORY COMMUNICATIONS (SMC) SOCKETS
+M: Karsten Graul <kgraul@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+S: Supported
+W: http://www.ibm.com/developerworks/linux/linux390/
+F: net/smc/
+
+SHARP GP2AP002A00F/GP2AP002S00F SENSOR DRIVER
+M: Linus Walleij <linus.walleij@linaro.org>
+L: linux-iio@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
+F: Documentation/devicetree/bindings/iio/light/sharp,gp2ap002.yaml
+F: drivers/iio/light/gp2ap002.c
+
+SHARP RJ54N1CB0C SENSOR DRIVER
+M: Jacopo Mondi <jacopo@jmondi.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/rj54n1cb0c.c
+F: include/media/i2c/rj54n1cb0c.h
+
+SH_VOU V4L2 OUTPUT DRIVER
+L: linux-media@vger.kernel.org
+S: Orphan
+F: drivers/media/platform/sh_vou.c
+F: include/media/drv-intf/sh_vou.h
+
+SI2157 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/si2157*
+
+SI2165 MEDIA DRIVER
+M: Matthias Schwarzott <zzam@gentoo.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/si2165*
+
+SI2168 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/si2168*
+
+SI470X FM RADIO RECEIVER I2C DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/si470x/radio-si470x-i2c.c
+
+SI470X FM RADIO RECEIVER USB DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/si470x/radio-si470x-common.c
+F: drivers/media/radio/si470x/radio-si470x-usb.c
+F: drivers/media/radio/si470x/radio-si470x.h
+
+SI4713 FM RADIO TRANSMITTER I2C DRIVER
+M: Eduardo Valentin <edubezval@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/si4713/si4713.?
+
+SI4713 FM RADIO TRANSMITTER PLATFORM DRIVER
+M: Eduardo Valentin <edubezval@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/si4713/radio-platform-si4713.c
+
+SI4713 FM RADIO TRANSMITTER USB DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/si4713/radio-usb-si4713.c
+
+SIANO DVB DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/common/siano/
+F: drivers/media/mmc/siano/
+F: drivers/media/usb/siano/
+F: drivers/media/usb/siano/
+
+SIFIVE DRIVERS
+M: Palmer Dabbelt <palmer@dabbelt.com>
+M: Paul Walmsley <paul.walmsley@sifive.com>
+L: linux-riscv@lists.infradead.org
+S: Supported
+T: git git://github.com/sifive/riscv-linux.git
+N: sifive
+K: [^@]sifive
+
+SIFIVE FU540 SYSTEM-ON-CHIP
+M: Paul Walmsley <paul.walmsley@sifive.com>
+M: Palmer Dabbelt <palmer@dabbelt.com>
+L: linux-riscv@lists.infradead.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pjw/sifive.git
+N: fu540
+K: fu540
+
+SIFIVE PDMA DRIVER
+M: Green Wan <green.wan@sifive.com>
+S: Maintained
+F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+F: drivers/dma/sf-pdma/
+
+SILEAD TOUCHSCREEN DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/input/touchscreen/silead.c
+F: drivers/platform/x86/touchscreen_dmi.c
+
+SILICON LABS WIRELESS DRIVERS (for WFxxx series)
+M: Jérôme Pouiller <jerome.pouiller@silabs.com>
+S: Supported
+F: drivers/staging/wfx/
+
+SILICON MOTION SM712 FRAME BUFFER DRIVER
+M: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
+M: Teddy Wang <teddy.wang@siliconmotion.com>
+M: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: Documentation/fb/sm712fb.rst
+F: drivers/video/fbdev/sm712*
+
+SILVACO I3C DUAL-ROLE MASTER
+M: Miquel Raynal <miquel.raynal@bootlin.com>
+M: Conor Culhane <conor.culhane@silvaco.com>
+L: linux-i3c@lists.infradead.org
+S: Maintained
+F: Documentation/devicetree/bindings/i3c/silvaco,i3c-master.yaml
+F: drivers/i3c/master/svc-i3c-master.c
+
+SIMPLEFB FB DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/simple-framebuffer.yaml
+F: drivers/video/fbdev/simplefb.c
+F: include/linux/platform_data/simplefb.h
+
+SIMTEC EB110ATX (Chalice CATS)
+M: Simtec Linux Team <linux@simtec.co.uk>
+S: Supported
+W: http://www.simtec.co.uk/products/EB110ATX/
+
+SIMTEC EB2410ITX (BAST)
+M: Simtec Linux Team <linux@simtec.co.uk>
+S: Supported
+W: http://www.simtec.co.uk/products/EB2410ITX/
+F: arch/arm/mach-s3c/bast-ide.c
+F: arch/arm/mach-s3c/bast-irq.c
+F: arch/arm/mach-s3c/mach-bast.c
+
+SIOX
+M: Thorsten Scherer <t.scherer@eckelmann.de>
+M: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+R: Pengutronix Kernel Team <kernel@pengutronix.de>
+S: Supported
+F: drivers/gpio/gpio-siox.c
+F: drivers/siox/*
+F: include/trace/events/siox.h
+
+SIPHASH PRF ROUTINES
+M: Jason A. Donenfeld <Jason@zx2c4.com>
+S: Maintained
+F: include/linux/siphash.h
+F: lib/siphash.c
+F: lib/test_siphash.c
+
+SIS 190 ETHERNET DRIVER
+M: Francois Romieu <romieu@fr.zoreil.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/sis/sis190.c
+
+SIS 900/7016 FAST ETHERNET DRIVER
+M: Daniele Venzano <venza@brownhat.org>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.brownhat.org/sis900.html
+F: drivers/net/ethernet/sis/sis900.*
+
+SIS FRAMEBUFFER DRIVER
+M: Thomas Winischhofer <thomas@winischhofer.net>
+S: Maintained
+W: http://www.winischhofer.net/linuxsisvga.shtml
+F: Documentation/fb/sisfb.rst
+F: drivers/video/fbdev/sis/
+F: include/video/sisfb.h
+
+SIS I2C TOUCHSCREEN DRIVER
+M: Mika Penttilä <mika.penttila@nextfour.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt
+F: drivers/input/touchscreen/sis_i2c.c
+
+SIS USB2VGA DRIVER
+M: Thomas Winischhofer <thomas@winischhofer.net>
+S: Maintained
+W: http://www.winischhofer.at/linuxsisusbvga.shtml
+F: drivers/usb/misc/sisusbvga/
+
+SLAB ALLOCATOR
+M: Christoph Lameter <cl@linux.com>
+M: Pekka Enberg <penberg@kernel.org>
+M: David Rientjes <rientjes@google.com>
+M: Joonsoo Kim <iamjoonsoo.kim@lge.com>
+M: Andrew Morton <akpm@linux-foundation.org>
+M: Vlastimil Babka <vbabka@suse.cz>
+L: linux-mm@kvack.org
+S: Maintained
+F: include/linux/sl?b*.h
+F: mm/sl?b*
+
+SLEEPABLE READ-COPY UPDATE (SRCU)
+M: Lai Jiangshan <jiangshanlai@gmail.com>
+M: "Paul E. McKenney" <paulmck@kernel.org>
+M: Josh Triplett <josh@joshtriplett.org>
+R: Steven Rostedt <rostedt@goodmis.org>
+R: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+L: rcu@vger.kernel.org
+S: Supported
+W: http://www.rdrop.com/users/paulmck/RCU/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
+F: include/linux/srcu*.h
+F: kernel/rcu/srcu*.c
+
+SMACK SECURITY MODULE
+M: Casey Schaufler <casey@schaufler-ca.com>
+L: linux-security-module@vger.kernel.org
+S: Maintained
+W: http://schaufler-ca.com
+T: git git://github.com/cschaufler/smack-next
+F: Documentation/admin-guide/LSM/Smack.rst
+F: security/smack/
+
+SMC91x ETHERNET DRIVER
+M: Nicolas Pitre <nico@fluxnic.net>
+S: Odd Fixes
+F: drivers/net/ethernet/smsc/smc91x.*
+
+SECURE MONITOR CALL(SMC) CALLING CONVENTION (SMCCC)
+M: Mark Rutland <mark.rutland@arm.com>
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/firmware/smccc/
+F: include/linux/arm-smccc.h
+
+SMM665 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/smm665.rst
+F: drivers/hwmon/smm665.c
+
+SMSC EMC2103 HARDWARE MONITOR DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/emc2103.rst
+F: drivers/hwmon/emc2103.c
+
+SMSC SCH5627 HARDWARE MONITOR DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-hwmon@vger.kernel.org
+S: Supported
+F: Documentation/hwmon/sch5627.rst
+F: drivers/hwmon/sch5627.c
+
+SMSC UFX6000 and UFX7000 USB to VGA DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/smscufx.c
+
+SMSC47B397 HARDWARE MONITOR DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/smsc47b397.rst
+F: drivers/hwmon/smsc47b397.c
+
+SMSC911x ETHERNET DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/smsc/smsc911x.*
+F: include/linux/smsc911x.h
+
+SMSC9420 PCI ETHERNET DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/smsc/smsc9420.*
+
+SOCIONEXT (SNI) AVE NETWORK DRIVER
+M: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/socionext,uniphier-ave4.yaml
+F: drivers/net/ethernet/socionext/sni_ave.c
+
+SOCIONEXT (SNI) NETSEC NETWORK DRIVER
+M: Jassi Brar <jaswinder.singh@linaro.org>
+M: Ilias Apalodimas <ilias.apalodimas@linaro.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/socionext-netsec.txt
+F: drivers/net/ethernet/socionext/netsec.c
+
+SOCIONEXT (SNI) Synquacer SPI DRIVER
+M: Masahisa Kojima <masahisa.kojima@linaro.org>
+M: Jassi Brar <jaswinder.singh@linaro.org>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/spi/spi-synquacer.txt
+F: drivers/spi/spi-synquacer.c
+
+SOCIONEXT SYNQUACER I2C DRIVER
+M: Ard Biesheuvel <ardb@kernel.org>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/i2c/i2c-synquacer.txt
+F: drivers/i2c/busses/i2c-synquacer.c
+
+SOCIONEXT UNIPHIER SOUND DRIVER
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Orphan
+F: sound/soc/uniphier/
+
+SOEKRIS NET48XX LED SUPPORT
+M: Chris Boot <bootc@bootc.net>
+S: Maintained
+F: drivers/leds/leds-net48xx.c
+
+SOFT-IWARP DRIVER (siw)
+M: Bernard Metzler <bmt@zurich.ibm.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/sw/siw/
+F: include/uapi/rdma/siw-abi.h
+
+SOFT-ROCE DRIVER (rxe)
+M: Zhu Yanjun <zyjzyj2000@gmail.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/infiniband/sw/rxe/
+F: include/uapi/rdma/rdma_user_rxe.h
+
+SOFTLOGIC 6x10 MPEG CODEC
+M: Bluecherry Maintainers <maintainers@bluecherrydvr.com>
+M: Anton Sviridenko <anton@corp.bluecherry.net>
+M: Andrey Utkin <andrey_utkin@fastmail.com>
+M: Ismael Luceno <ismael@iodev.co.uk>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/pci/solo6x10/
+
+SOFTWARE DELEGATED EXCEPTION INTERFACE (SDEI)
+M: James Morse <james.morse@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/firmware/sdei.txt
+F: drivers/firmware/arm_sdei.c
+F: include/linux/arm_sdei.h
+F: include/uapi/linux/arm_sdei.h
+
+SOFTWARE NODES
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+R: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+L: linux-acpi@vger.kernel.org
+S: Maintained
+F: drivers/base/swnode.c
+
+SOFTWARE RAID (Multiple Disks) SUPPORT
+M: Song Liu <song@kernel.org>
+L: linux-raid@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/song/md.git
+F: drivers/md/Kconfig
+F: drivers/md/Makefile
+F: drivers/md/md*
+F: drivers/md/raid*
+F: include/linux/raid/
+F: include/uapi/linux/raid/
+
+SOLIDRUN CLEARFOG SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+S: Maintained
+F: arch/arm/boot/dts/armada-388-clearfog*
+F: arch/arm/boot/dts/armada-38x-solidrun-*
+
+SOLIDRUN CUBOX-I/HUMMINGBOARD SUPPORT
+M: Russell King <linux@armlinux.org.uk>
+S: Maintained
+F: arch/arm/boot/dts/imx6*-cubox-i*
+F: arch/arm/boot/dts/imx6*-hummingboard*
+F: arch/arm/boot/dts/imx6*-sr-*
+
+SONIC NETWORK DRIVER
+M: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/natsemi/sonic.*
+
+SONICS SILICON BACKPLANE DRIVER (SSB)
+M: Michael Buesch <m@bues.ch>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/ssb/
+F: include/linux/ssb/
+
+SONY IMX208 SENSOR DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/imx208.c
+
+SONY IMX214 SENSOR DRIVER
+M: Ricardo Ribalda <ribalda@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/sony,imx214.yaml
+F: drivers/media/i2c/imx214.c
+
+SONY IMX219 SENSOR DRIVER
+M: Dave Stevenson <dave.stevenson@raspberrypi.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/imx219.yaml
+F: drivers/media/i2c/imx219.c
+
+SONY IMX258 SENSOR DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/imx258.yaml
+F: drivers/media/i2c/imx258.c
+
+SONY IMX274 SENSOR DRIVER
+M: Leon Luo <leonl@leopardimaging.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/sony,imx274.yaml
+F: drivers/media/i2c/imx274.c
+
+SONY IMX290 SENSOR DRIVER
+M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/imx290.txt
+F: drivers/media/i2c/imx290.c
+
+SONY IMX319 SENSOR DRIVER
+M: Bingbu Cao <bingbu.cao@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/imx319.c
+
+SONY IMX334 SENSOR DRIVER
+M: Paul J. Murphy <paul.j.murphy@intel.com>
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/sony,imx334.yaml
+F: drivers/media/i2c/imx334.c
+
+SONY IMX335 SENSOR DRIVER
+M: Paul J. Murphy <paul.j.murphy@intel.com>
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml
+F: drivers/media/i2c/imx335.c
+
+SONY IMX355 SENSOR DRIVER
+M: Tianshu Qiu <tian.shu.qiu@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/imx355.c
+
+SONY IMX412 SENSOR DRIVER
+M: Paul J. Murphy <paul.j.murphy@intel.com>
+M: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/sony,imx412.yaml
+F: drivers/media/i2c/imx412.c
+
+SONY MEMORYSTICK SUBSYSTEM
+M: Maxim Levitsky <maximlevitsky@gmail.com>
+M: Alex Dubov <oakad@yahoo.com>
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git
+F: drivers/memstick/
+F: include/linux/memstick.h
+
+SONY VAIO CONTROL DEVICE DRIVER
+M: Mattia Dongili <malattia@linux.it>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://www.linux.it/~malattia/wiki/index.php/Sony_drivers
+F: Documentation/admin-guide/laptops/sony-laptop.rst
+F: drivers/char/sonypi.c
+F: drivers/platform/x86/sony-laptop.c
+F: include/linux/sony-laptop.h
+
+SOUND
+M: Jaroslav Kysela <perex@perex.cz>
+M: Takashi Iwai <tiwai@suse.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.alsa-project.org/
+Q: http://patchwork.kernel.org/project/alsa-devel/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: Documentation/sound/
+F: include/sound/
+F: include/uapi/sound/
+F: sound/
+
+SOUND - COMPRESSED AUDIO
+M: Vinod Koul <vkoul@kernel.org>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: Documentation/sound/designs/compress-offload.rst
+F: include/sound/compress_driver.h
+F: include/uapi/sound/compress_*
+F: sound/core/compress_offload.c
+F: sound/soc/soc-compress.c
+
+SOUND - DMAENGINE HELPERS
+M: Lars-Peter Clausen <lars@metafoo.de>
+S: Supported
+F: include/sound/dmaengine_pcm.h
+F: sound/core/pcm_dmaengine.c
+F: sound/soc/soc-generic-dmaengine-pcm.c
+
+SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEMENT (ASoC)
+M: Liam Girdwood <lgirdwood@gmail.com>
+M: Mark Brown <broonie@kernel.org>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+W: http://alsa-project.org/main/index.php/ASoC
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
+F: Documentation/devicetree/bindings/sound/
+F: Documentation/sound/soc/
+F: include/dt-bindings/sound/
+F: include/sound/soc*
+F: sound/soc/
+
+SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS
+M: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
+M: Liam Girdwood <lgirdwood@gmail.com>
+M: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
+M: Kai Vehmanen <kai.vehmanen@linux.intel.com>
+M: Daniel Baluta <daniel.baluta@nxp.com>
+L: sound-open-firmware@alsa-project.org (moderated for non-subscribers)
+S: Supported
+W: https://github.com/thesofproject/linux/
+F: sound/soc/sof/
+
+SOUNDWIRE SUBSYSTEM
+M: Vinod Koul <vkoul@kernel.org>
+M: Bard Liao <yung-chuan.liao@linux.intel.com>
+R: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
+R: Sanyog Kale <sanyog.r.kale@intel.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire.git
+F: Documentation/driver-api/soundwire/
+F: drivers/soundwire/
+F: include/linux/soundwire/
+
+SP2 MEDIA DRIVER
+M: Olli Salonen <olli.salonen@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/sp2*
+
+SPARC + UltraSPARC (sparc/sparc64)
+M: "David S. Miller" <davem@davemloft.net>
+L: sparclinux@vger.kernel.org
+S: Maintained
+Q: http://patchwork.ozlabs.org/project/sparclinux/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git
+F: arch/sparc/
+F: drivers/sbus/
+
+SPARC SERIAL DRIVERS
+M: "David S. Miller" <davem@davemloft.net>
+L: sparclinux@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git
+F: drivers/tty/serial/suncore.c
+F: drivers/tty/serial/sunhv.c
+F: drivers/tty/serial/sunsab.c
+F: drivers/tty/serial/sunsab.h
+F: drivers/tty/serial/sunsu.c
+F: drivers/tty/serial/sunzilog.c
+F: drivers/tty/serial/sunzilog.h
+F: drivers/tty/vcc.c
+F: include/linux/sunserialcore.h
+
+SPARSE CHECKER
+M: "Luc Van Oostenryck" <luc.vanoostenryck@gmail.com>
+L: linux-sparse@vger.kernel.org
+S: Maintained
+W: https://sparse.docs.kernel.org/
+T: git git://git.kernel.org/pub/scm/devel/sparse/sparse.git
+Q: https://patchwork.kernel.org/project/linux-sparse/list/
+B: https://bugzilla.kernel.org/enter_bug.cgi?component=Sparse&product=Tools
+F: include/linux/compiler.h
+
+SPEAKUP CONSOLE SPEECH DRIVER
+M: William Hubbs <w.d.hubbs@gmail.com>
+M: Chris Brannon <chris@the-brannons.com>
+M: Kirk Reiser <kirk@reisers.ca>
+M: Samuel Thibault <samuel.thibault@ens-lyon.org>
+L: speakup@linux-speakup.org
+S: Odd Fixes
+W: http://www.linux-speakup.org/
+W: https://github.com/linux-speakup/speakup
+B: https://github.com/linux-speakup/speakup/issues
+F: drivers/accessibility/speakup/
+
+SPEAR CLOCK FRAMEWORK SUPPORT
+M: Viresh Kumar <vireshk@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.st.com/spear
+F: drivers/clk/spear/
+
+SPEAR PLATFORM SUPPORT
+M: Viresh Kumar <vireshk@kernel.org>
+M: Shiraz Hashim <shiraz.linux.kernel@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+W: http://www.st.com/spear
+F: arch/arm/boot/dts/spear*
+F: arch/arm/mach-spear/
+
+SPI NOR SUBSYSTEM
+M: Tudor Ambarus <tudor.ambarus@microchip.com>
+R: Michael Walle <michael@walle.cc>
+R: Pratyush Yadav <p.yadav@ti.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+W: http://www.linux-mtd.infradead.org/
+Q: http://patchwork.ozlabs.org/project/linux-mtd/list/
+C: irc://irc.oftc.net/mtd
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-nor/next
+F: drivers/mtd/spi-nor/
+F: include/linux/mtd/spi-nor.h
+
+SPI SUBSYSTEM
+M: Mark Brown <broonie@kernel.org>
+L: linux-spi@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/spi-devel-general/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
+F: Documentation/devicetree/bindings/spi/
+F: Documentation/spi/
+F: drivers/spi/
+F: include/linux/spi/
+F: include/uapi/linux/spi/
+F: tools/spi/
+
+SPIDERNET NETWORK DRIVER for CELL
+M: Ishizaki Kou <kou.ishizaki@toshiba.co.jp>
+M: Geoff Levand <geoff@infradead.org>
+L: netdev@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: Documentation/networking/device_drivers/ethernet/toshiba/spider_net.rst
+F: drivers/net/ethernet/toshiba/spider_net*
+
+SPMI SUBSYSTEM
+M: Stephen Boyd <sboyd@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git
+F: Documentation/devicetree/bindings/spmi/
+F: drivers/spmi/
+F: include/dt-bindings/spmi/spmi.h
+F: include/linux/spmi.h
+F: include/trace/events/spmi.h
+
+SPU FILE SYSTEM
+M: Jeremy Kerr <jk@ozlabs.org>
+L: linuxppc-dev@lists.ozlabs.org
+S: Supported
+W: http://www.ibm.com/developerworks/power/cell/
+F: Documentation/filesystems/spufs/spufs.rst
+F: arch/powerpc/platforms/cell/spufs/
+
+SQUASHFS FILE SYSTEM
+M: Phillip Lougher <phillip@squashfs.org.uk>
+L: squashfs-devel@lists.sourceforge.net (subscribers-only)
+S: Maintained
+W: http://squashfs.org.uk
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next.git
+F: Documentation/filesystems/squashfs.rst
+F: fs/squashfs/
+
+SRM (Alpha) environment access
+M: Jan-Benedict Glaw <jbglaw@lug-owl.de>
+S: Maintained
+F: arch/alpha/kernel/srm_env.c
+
+ST LSM6DSx IMU IIO DRIVER
+M: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+W: http://www.st.com/
+F: Documentation/devicetree/bindings/iio/imu/st,lsm6dsx.yaml
+F: drivers/iio/imu/st_lsm6dsx/
+
+ST MIPID02 CSI-2 TO PARALLEL BRIDGE DRIVER
+M: Mickael Guene <mickael.guene@st.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt
+F: drivers/media/i2c/st-mipid02.c
+
+ST STM32 I2C/SMBUS DRIVER
+M: Pierre-Yves MORDRET <pierre-yves.mordret@foss.st.com>
+M: Alain Volmat <alain.volmat@foss.st.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-stm32*
+
+ST STM32 SPI DRIVER
+M: Alain Volmat <alain.volmat@foss.st.com>
+L: linux-spi@vger.kernel.org
+S: Maintained
+F: drivers/spi/spi-stm32.c
+
+ST STPDDC60 DRIVER
+M: Daniel Nilsson <daniel.nilsson@flex.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/stpddc60.rst
+F: drivers/hwmon/pmbus/stpddc60.c
+
+ST VL53L0X ToF RANGER(I2C) IIO DRIVER
+M: Song Qiang <songqiang1304521@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/proximity/st,vl53l0x.yaml
+F: drivers/iio/proximity/vl53l0x-i2c.c
+
+STABLE BRANCH
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+M: Sasha Levin <sashal@kernel.org>
+L: stable@vger.kernel.org
+S: Supported
+F: Documentation/process/stable-kernel-rules.rst
+
+STAGING - ATOMISP DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+R: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/staging/media/atomisp/
+
+STAGING - FIELDBUS SUBSYSTEM
+M: Sven Van Asbroeck <TheSven73@gmail.com>
+S: Maintained
+F: drivers/staging/fieldbus/*
+F: drivers/staging/fieldbus/Documentation/
+
+STAGING - HMS ANYBUS-S BUS
+M: Sven Van Asbroeck <TheSven73@gmail.com>
+S: Maintained
+F: drivers/staging/fieldbus/anybuss/
+
+STAGING - INDUSTRIAL IO
+M: Jonathan Cameron <jic23@kernel.org>
+L: linux-iio@vger.kernel.org
+S: Odd Fixes
+F: Documentation/devicetree/bindings/staging/iio/
+F: drivers/staging/iio/
+
+STAGING - NVIDIA COMPLIANT EMBEDDED CONTROLLER INTERFACE (nvec)
+M: Marc Dietrich <marvin24@gmx.de>
+L: ac100@lists.launchpad.net (moderated for non-subscribers)
+L: linux-tegra@vger.kernel.org
+S: Maintained
+F: drivers/staging/nvec/
+
+STAGING - OLPC SECONDARY DISPLAY CONTROLLER (DCON)
+M: Jens Frederich <jfrederich@gmail.com>
+M: Jon Nettleton <jon.nettleton@gmail.com>
+S: Maintained
+W: http://wiki.laptop.org/go/DCON
+F: drivers/staging/olpc_dcon/
+
+STAGING - REALTEK RTL8188EU DRIVERS
+M: Larry Finger <Larry.Finger@lwfinger.net>
+M: Phillip Potter <phil@philpotter.co.uk>
+S: Supported
+F: drivers/staging/r8188eu/
+
+STAGING - REALTEK RTL8712U DRIVERS
+M: Larry Finger <Larry.Finger@lwfinger.net>
+M: Florian Schilhabel <florian.c.schilhabel@googlemail.com>.
+S: Odd Fixes
+F: drivers/staging/rtl8712/
+
+STAGING - SEPS525 LCD CONTROLLER DRIVERS
+M: Michael Hennerich <michael.hennerich@analog.com>
+L: linux-fbdev@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
+F: drivers/staging/fbtft/fb_seps525.c
+
+STAGING - SILICON MOTION SM750 FRAME BUFFER DRIVER
+M: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
+M: Teddy Wang <teddy.wang@siliconmotion.com>
+M: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/staging/sm750fb/
+
+STAGING - VIA VT665X DRIVERS
+M: Forest Bond <forest@alittletooquiet.net>
+S: Odd Fixes
+F: drivers/staging/vt665?/
+
+STAGING SUBSYSTEM
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-staging@lists.linux.dev
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
+F: drivers/staging/
+
+STARFIRE/DURALAN NETWORK DRIVER
+M: Ion Badulescu <ionut@badula.org>
+S: Odd Fixes
+F: drivers/net/ethernet/adaptec/starfire*
+
+STATIC BRANCH/CALL
+M: Peter Zijlstra <peterz@infradead.org>
+M: Josh Poimboeuf <jpoimboe@redhat.com>
+M: Jason Baron <jbaron@akamai.com>
+R: Steven Rostedt <rostedt@goodmis.org>
+R: Ard Biesheuvel <ardb@kernel.org>
+S: Supported
+F: arch/*/include/asm/jump_label*.h
+F: arch/*/include/asm/static_call*.h
+F: arch/*/kernel/jump_label.c
+F: arch/*/kernel/static_call.c
+F: include/linux/jump_label*.h
+F: include/linux/static_call*.h
+F: kernel/jump_label.c
+F: kernel/static_call.c
+
+STI AUDIO (ASoC) DRIVERS
+M: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt
+F: sound/soc/sti/
+
+STI CEC DRIVER
+M: Benjamin Gaignard <benjamin.gaignard@linaro.org>
+S: Maintained
+F: Documentation/devicetree/bindings/media/stih-cec.txt
+F: drivers/media/cec/platform/sti/
+
+STK1160 USB VIDEO CAPTURE DRIVER
+M: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
+L: linux-media@vger.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/stk1160/
+
+STM32 AUDIO (ASoC) DRIVERS
+M: Olivier Moysan <olivier.moysan@foss.st.com>
+M: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/iio/adc/st,stm32-dfsdm-adc.yaml
+F: Documentation/devicetree/bindings/sound/st,stm32-*.yaml
+F: sound/soc/stm/
+
+STM32 TIMER/LPTIMER DRIVERS
+M: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+S: Maintained
+F: Documentation/ABI/testing/*timer-stm32
+F: Documentation/devicetree/bindings/*/*stm32-*timer*
+F: drivers/*/stm32-*timer*
+F: drivers/pwm/pwm-stm32*
+F: include/linux/*/stm32-*tim*
+
+STMMAC ETHERNET DRIVER
+M: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+M: Alexandre Torgue <alexandre.torgue@foss.st.com>
+M: Jose Abreu <joabreu@synopsys.com>
+L: netdev@vger.kernel.org
+S: Supported
+W: http://www.stlinux.com
+F: Documentation/networking/device_drivers/ethernet/stmicro/
+F: drivers/net/ethernet/stmicro/stmmac/
+
+SUN3/3X
+M: Sam Creasey <sammy@sammy.net>
+S: Maintained
+W: http://sammy.net/sun3/
+F: arch/m68k/include/asm/sun3*
+F: arch/m68k/kernel/*sun3*
+F: arch/m68k/sun3*/
+F: drivers/net/ethernet/i825xx/sun3*
+
+SUN4I LOW RES ADC ATTACHED TABLET KEYS DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml
+F: drivers/input/keyboard/sun4i-lradc-keys.c
+
+SUNDANCE NETWORK DRIVER
+M: Denis Kirjanov <kda@linux-powerpc.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/dlink/sundance.c
+
+SUPERH
+M: Yoshinori Sato <ysato@users.sourceforge.jp>
+M: Rich Felker <dalias@libc.org>
+L: linux-sh@vger.kernel.org
+S: Maintained
+Q: http://patchwork.kernel.org/project/linux-sh/list/
+F: Documentation/sh/
+F: arch/sh/
+F: drivers/sh/
+
+SUSPEND TO RAM
+M: "Rafael J. Wysocki" <rafael@kernel.org>
+M: Len Brown <len.brown@intel.com>
+M: Pavel Machek <pavel@ucw.cz>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+F: Documentation/power/
+F: arch/x86/kernel/acpi/
+F: drivers/base/power/
+F: include/linux/freezer.h
+F: include/linux/pm.h
+F: include/linux/suspend.h
+F: kernel/power/
+
+SVGA HANDLING
+M: Martin Mares <mj@ucw.cz>
+L: linux-video@atrey.karlin.mff.cuni.cz
+S: Maintained
+F: Documentation/admin-guide/svga.rst
+F: arch/x86/boot/video*
+
+SWIOTLB SUBSYSTEM
+M: Christoph Hellwig <hch@infradead.org>
+L: iommu@lists.linux-foundation.org
+S: Supported
+W: http://git.infradead.org/users/hch/dma-mapping.git
+T: git git://git.infradead.org/users/hch/dma-mapping.git
+F: arch/*/kernel/pci-swiotlb.c
+F: include/linux/swiotlb.h
+F: kernel/dma/swiotlb.c
+
+SWITCHDEV
+M: Jiri Pirko <jiri@resnulli.us>
+M: Ivan Vecera <ivecera@redhat.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: include/net/switchdev.h
+F: net/switchdev/
+
+SY8106A REGULATOR DRIVER
+M: Icenowy Zheng <icenowy@aosc.io>
+S: Maintained
+F: Documentation/devicetree/bindings/regulator/silergy,sy8106a.yaml
+F: drivers/regulator/sy8106a-regulator.c
+
+SYNC FILE FRAMEWORK
+M: Sumit Semwal <sumit.semwal@linaro.org>
+R: Gustavo Padovan <gustavo@padovan.org>
+L: linux-media@vger.kernel.org
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/driver-api/sync_file.rst
+F: drivers/dma-buf/dma-fence*
+F: drivers/dma-buf/sw_sync.c
+F: drivers/dma-buf/sync_*
+F: include/linux/sync_file.h
+F: include/uapi/linux/sync_file.h
+
+SYNOPSYS ARC ARCHITECTURE
+M: Vineet Gupta <vgupta@kernel.org>
+L: linux-snps-arc@lists.infradead.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git
+F: Documentation/devicetree/bindings/arc/*
+F: Documentation/devicetree/bindings/interrupt-controller/snps,arc*
+F: arch/arc/
+F: drivers/clocksource/arc_timer.c
+F: drivers/tty/serial/arc_uart.c
+
+SYNOPSYS ARC HSDK SDP pll clock driver
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/clock/snps,hsdk-pll-clock.txt
+F: drivers/clk/clk-hsdk-pll.c
+
+SYNOPSYS ARC SDP clock driver
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/clock/snps,pll-clock.txt
+F: drivers/clk/axs10x/*
+
+SYNOPSYS ARC SDP platform support
+M: Alexey Brodkin <abrodkin@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/arc/axs10*
+F: arch/arc/boot/dts/ax*
+F: arch/arc/plat-axs10x
+
+SYNOPSYS AXS10x RESET CONTROLLER DRIVER
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/reset/snps,axs10x-reset.txt
+F: drivers/reset/reset-axs10x.c
+
+SYNOPSYS CREG GPIO DRIVER
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt
+F: drivers/gpio/gpio-creg-snps.c
+
+SYNOPSYS DESIGNWARE 8250 UART DRIVER
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+S: Maintained
+F: drivers/tty/serial/8250/8250_dw.c
+F: drivers/tty/serial/8250/8250_dwlib.*
+F: drivers/tty/serial/8250/8250_lpss.c
+
+SYNOPSYS DESIGNWARE APB GPIO DRIVER
+M: Hoan Tran <hoan@os.amperecomputing.com>
+M: Serge Semin <fancer.lancer@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml
+F: drivers/gpio/gpio-dwapb.c
+
+SYNOPSYS DESIGNWARE APB SSI DRIVER
+M: Serge Semin <fancer.lancer@gmail.com>
+L: linux-spi@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+F: drivers/spi/spi-dw*
+
+SYNOPSYS DESIGNWARE AXI DMAC DRIVER
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Maintained
+F: Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
+F: drivers/dma/dw-axi-dmac/
+
+SYNOPSYS DESIGNWARE DMAC DRIVER
+M: Viresh Kumar <vireshk@kernel.org>
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
+F: drivers/dma/dw/
+F: include/dt-bindings/dma/dw-dmac.h
+F: include/linux/dma/dw.h
+F: include/linux/platform_data/dma-dw.h
+
+SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
+M: Jose Abreu <Jose.Abreu@synopsys.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/synopsys/
+
+SYNOPSYS DESIGNWARE ETHERNET XPCS DRIVER
+M: Jose Abreu <Jose.Abreu@synopsys.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/pcs/pcs-xpcs.c
+F: drivers/net/pcs/pcs-xpcs.h
+F: include/linux/pcs/pcs-xpcs.h
+
+SYNOPSYS DESIGNWARE I2C DRIVER
+M: Jarkko Nikula <jarkko.nikula@linux.intel.com>
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+R: Mika Westerberg <mika.westerberg@linux.intel.com>
+L: linux-i2c@vger.kernel.org
+S: Maintained
+F: drivers/i2c/busses/i2c-designware-*
+
+SYNOPSYS DESIGNWARE MMC/SD/SDIO DRIVER
+M: Jaehoon Chung <jh80.chung@samsung.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/dw_mmc*
+
+SYNOPSYS HSDK RESET CONTROLLER DRIVER
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: Documentation/devicetree/bindings/reset/snps,hsdk-reset.txt
+F: drivers/reset/reset-hsdk.c
+F: include/dt-bindings/reset/snps,hsdk-reset.h
+
+SYNOPSYS SDHCI COMPLIANT DWC MSHC DRIVER
+M: Prabu Thangamuthu <prabu.t@synopsys.com>
+M: Manjunath M B <manjumb@synopsys.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sdhci-pci-dwc-mshc.c
+
+SYSTEM CONFIGURATION (SYSCON)
+M: Lee Jones <lee.jones@linaro.org>
+M: Arnd Bergmann <arnd@arndb.de>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git
+F: drivers/mfd/syscon.c
+
+SYSTEM CONTROL & POWER/MANAGEMENT INTERFACE (SCPI/SCMI) Message Protocol drivers
+M: Sudeep Holla <sudeep.holla@arm.com>
+R: Cristian Marussi <cristian.marussi@arm.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/firmware/arm,sc[mp]i.yaml
+F: drivers/clk/clk-sc[mp]i.c
+F: drivers/cpufreq/sc[mp]i-cpufreq.c
+F: drivers/firmware/arm_scmi/
+F: drivers/firmware/arm_scpi.c
+F: drivers/regulator/scmi-regulator.c
+F: drivers/reset/reset-scmi.c
+F: include/linux/sc[mp]i_protocol.h
+F: include/trace/events/scmi.h
+F: include/uapi/linux/virtio_scmi.h
+
+SYSTEM RESET/SHUTDOWN DRIVERS
+M: Sebastian Reichel <sre@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git
+F: Documentation/devicetree/bindings/power/reset/
+F: drivers/power/reset/
+
+SYSTEM TRACE MODULE CLASS
+M: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ash/stm.git
+F: Documentation/trace/stm.rst
+F: drivers/hwtracing/stm/
+F: include/linux/stm.h
+F: include/uapi/linux/stm.h
+
+SYSTEM76 ACPI DRIVER
+M: Jeremy Soller <jeremy@system76.com>
+M: System76 Product Development <productdev@system76.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/system76_acpi.c
+
+SYSV FILESYSTEM
+M: Christoph Hellwig <hch@infradead.org>
+S: Maintained
+F: Documentation/filesystems/sysv-fs.rst
+F: fs/sysv/
+F: include/linux/sysv_fs.h
+
+TASKSTATS STATISTICS INTERFACE
+M: Balbir Singh <bsingharora@gmail.com>
+S: Maintained
+F: Documentation/accounting/taskstats*
+F: include/linux/taskstats*
+F: kernel/taskstats.c
+
+TC subsystem
+M: Jamal Hadi Salim <jhs@mojatatu.com>
+M: Cong Wang <xiyou.wangcong@gmail.com>
+M: Jiri Pirko <jiri@resnulli.us>
+L: netdev@vger.kernel.org
+S: Maintained
+F: include/net/pkt_cls.h
+F: include/net/pkt_sched.h
+F: include/net/tc_act/
+F: include/uapi/linux/pkt_cls.h
+F: include/uapi/linux/pkt_sched.h
+F: include/uapi/linux/tc_act/
+F: include/uapi/linux/tc_ematch/
+F: net/sched/
+
+TC90522 MEDIA DRIVER
+M: Akihiro Tsukada <tskd08@gmail.com>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+F: drivers/media/dvb-frontends/tc90522*
+
+TCP LOW PRIORITY MODULE
+M: "Wong Hoi Sing, Edison" <hswong3i@gmail.com>
+M: "Hung Hing Lun, Mike" <hlhung3i@gmail.com>
+S: Maintained
+W: http://tcp-lp-mod.sourceforge.net/
+F: net/ipv4/tcp_lp.c
+
+TDA10071 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/dvb-frontends/tda10071*
+
+TDA18212 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/tda18212*
+
+TDA18218 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/tda18218*
+
+TDA18250 MEDIA DRIVER
+M: Olli Salonen <olli.salonen@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/tuners/tda18250*
+
+TDA18271 MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/tuners/tda18271*
+
+TDA1997x MEDIA DRIVER
+M: Tim Harvey <tharvey@gateworks.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/i2c/tda1997x.*
+
+TDA827x MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/tuners/tda8290.*
+
+TDA8290 MEDIA DRIVER
+M: Michael Krufky <mkrufky@linuxtv.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://github.com/mkrufky
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mkrufky/tuners.git
+F: drivers/media/tuners/tda8290.*
+
+TDA9840 MEDIA DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/tda9840*
+
+TEA5761 TUNER DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/tuners/tea5761.*
+
+TEA5767 TUNER DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/tuners/tea5767.*
+
+TEA6415C MEDIA DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/tea6415c*
+
+TEA6420 MEDIA DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/tea6420*
+
+TEAM DRIVER
+M: Jiri Pirko <jiri@resnulli.us>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/team/
+F: include/linux/if_team.h
+F: include/uapi/linux/if_team.h
+
+TECHNOLOGIC SYSTEMS TS-5500 PLATFORM SUPPORT
+M: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com>
+S: Maintained
+F: arch/x86/platform/ts5500/
+
+TECHNOTREND USB IR RECEIVER
+M: Sean Young <sean@mess.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/rc/ttusbir.c
+
+TECHWELL TW9910 VIDEO DECODER
+L: linux-media@vger.kernel.org
+S: Orphan
+F: drivers/media/i2c/tw9910.c
+F: include/media/i2c/tw9910.h
+
+TEE SUBSYSTEM
+M: Jens Wiklander <jens.wiklander@linaro.org>
+R: Sumit Garg <sumit.garg@linaro.org>
+L: op-tee@lists.trustedfirmware.org
+S: Maintained
+F: Documentation/staging/tee.rst
+F: drivers/tee/
+F: include/linux/tee_drv.h
+F: include/uapi/linux/tee.h
+
+TEGRA ARCHITECTURE SUPPORT
+M: Thierry Reding <thierry.reding@gmail.com>
+M: Jonathan Hunter <jonathanh@nvidia.com>
+L: linux-tegra@vger.kernel.org
+S: Supported
+Q: http://patchwork.ozlabs.org/project/linux-tegra/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git
+N: [^a-z]tegra
+
+TEGRA CLOCK DRIVER
+M: Peter De Schrijver <pdeschrijver@nvidia.com>
+M: Prashant Gaikwad <pgaikwad@nvidia.com>
+S: Supported
+F: drivers/clk/tegra/
+
+TEGRA DMA DRIVERS
+M: Laxman Dewangan <ldewangan@nvidia.com>
+M: Jon Hunter <jonathanh@nvidia.com>
+S: Supported
+F: drivers/dma/tegra*
+
+TEGRA I2C DRIVER
+M: Laxman Dewangan <ldewangan@nvidia.com>
+R: Dmitry Osipenko <digetx@gmail.com>
+S: Supported
+F: drivers/i2c/busses/i2c-tegra.c
+
+TEGRA IOMMU DRIVERS
+M: Thierry Reding <thierry.reding@gmail.com>
+R: Krishna Reddy <vdumpa@nvidia.com>
+L: linux-tegra@vger.kernel.org
+S: Supported
+F: drivers/iommu/arm/arm-smmu/arm-smmu-nvidia.c
+F: drivers/iommu/tegra*
+
+TEGRA KBC DRIVER
+M: Laxman Dewangan <ldewangan@nvidia.com>
+S: Supported
+F: drivers/input/keyboard/tegra-kbc.c
+
+TEGRA NAND DRIVER
+M: Stefan Agner <stefan@agner.ch>
+M: Lucas Stach <dev@lynxeye.de>
+S: Maintained
+F: Documentation/devicetree/bindings/mtd/nvidia-tegra20-nand.txt
+F: drivers/mtd/nand/raw/tegra_nand.c
+
+TEGRA PWM DRIVER
+M: Thierry Reding <thierry.reding@gmail.com>
+S: Supported
+F: drivers/pwm/pwm-tegra.c
+
+TEGRA SERIAL DRIVER
+M: Laxman Dewangan <ldewangan@nvidia.com>
+S: Supported
+F: drivers/tty/serial/serial-tegra.c
+
+TEGRA SPI DRIVER
+M: Laxman Dewangan <ldewangan@nvidia.com>
+S: Supported
+F: drivers/spi/spi-tegra*
+
+TEGRA QUAD SPI DRIVER
+M: Thierry Reding <thierry.reding@gmail.com>
+M: Jonathan Hunter <jonathanh@nvidia.com>
+M: Sowjanya Komatineni <skomatineni@nvidia.com>
+L: linux-tegra@vger.kernel.org
+S: Maintained
+F: drivers/spi/spi-tegra210-quad.c
+
+TEGRA VIDEO DRIVER
+M: Thierry Reding <thierry.reding@gmail.com>
+M: Jonathan Hunter <jonathanh@nvidia.com>
+M: Sowjanya Komatineni <skomatineni@nvidia.com>
+L: linux-media@vger.kernel.org
+L: linux-tegra@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
+F: drivers/staging/media/tegra-video/
+
+TEGRA XUSB PADCTL DRIVER
+M: JC Kuo <jckuo@nvidia.com>
+S: Supported
+F: drivers/phy/tegra/xusb*
+
+TEHUTI ETHERNET DRIVER
+M: Andy Gospodarek <andy@greyhouse.net>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/ethernet/tehuti/*
+
+TELECOM CLOCK DRIVER FOR MCPL0010
+M: Mark Gross <mark.gross@intel.com>
+S: Supported
+F: drivers/char/tlclk.c
+
+TEMPO SEMICONDUCTOR DRIVERS
+M: Steven Eckhoff <steven.eckhoff.opensource@gmail.com>
+S: Maintained
+F: Documentation/devicetree/bindings/sound/tscs*.txt
+F: sound/soc/codecs/tscs*.c
+F: sound/soc/codecs/tscs*.h
+
+TENSILICA XTENSA PORT (xtensa)
+M: Chris Zankel <chris@zankel.net>
+M: Max Filippov <jcmvbkbc@gmail.com>
+L: linux-xtensa@linux-xtensa.org
+S: Maintained
+T: git git://github.com/czankel/xtensa-linux.git
+F: arch/xtensa/
+F: drivers/irqchip/irq-xtensa-*
+
+TEXAS INSTRUMENTS ASoC DRIVERS
+M: Peter Ujfalusi <peter.ujfalusi@gmail.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: sound/soc/ti/
+
+TEXAS INSTRUMENTS' DAC7612 DAC DRIVER
+M: Ricardo Ribalda <ribalda@kernel.org>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/dac/ti,dac7612.yaml
+F: drivers/iio/dac/ti-dac7612.c
+
+TEXAS INSTRUMENTS DMA DRIVERS
+M: Peter Ujfalusi <peter.ujfalusi@gmail.com>
+L: dmaengine@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/dma/ti-dma-crossbar.txt
+F: Documentation/devicetree/bindings/dma/ti-edma.txt
+F: Documentation/devicetree/bindings/dma/ti/
+F: drivers/dma/ti/
+X: drivers/dma/ti/cppi41.c
+F: include/linux/dma/k3-udma-glue.h
+F: include/linux/dma/ti-cppi5.h
+F: include/linux/dma/k3-psil.h
+
+TEXAS INSTRUMENTS' SYSTEM CONTROL INTERFACE (TISCI) PROTOCOL DRIVER
+M: Nishanth Menon <nm@ti.com>
+M: Tero Kristo <kristo@kernel.org>
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/arm/keystone/ti,k3-sci-common.yaml
+F: Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
+F: Documentation/devicetree/bindings/clock/ti,sci-clk.yaml
+F: Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml
+F: Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
+F: Documentation/devicetree/bindings/reset/ti,sci-reset.yaml
+F: Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
+F: drivers/clk/keystone/sci-clk.c
+F: drivers/firmware/ti_sci*
+F: drivers/irqchip/irq-ti-sci-inta.c
+F: drivers/irqchip/irq-ti-sci-intr.c
+F: drivers/reset/reset-ti-sci.c
+F: drivers/soc/ti/ti_sci_inta_msi.c
+F: drivers/soc/ti/ti_sci_pm_domains.c
+F: include/dt-bindings/soc/ti,sci_pm_domain.h
+F: include/linux/soc/ti/ti_sci_inta_msi.h
+F: include/linux/soc/ti/ti_sci_protocol.h
+
+TEXAS INSTRUMENTS TPS23861 PoE PSE DRIVER
+M: Robert Marko <robert.marko@sartura.hr>
+M: Luka Perkov <luka.perkov@sartura.hr>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/hwmon/ti,tps23861.yaml
+F: Documentation/hwmon/tps23861.rst
+F: drivers/hwmon/tps23861.c
+
+TEXAS INSTRUMENTS' TMP117 TEMPERATURE SENSOR DRIVER
+M: Puranjay Mohan <puranjay12@gmail.com>
+L: linux-iio@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
+F: drivers/iio/temperature/tmp117.c
+
+THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/radio/radio-raremono.c
+
+THERMAL
+M: Rafael J. Wysocki <rafael@kernel.org>
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+R: Amit Kucheria <amitk@kernel.org>
+R: Zhang Rui <rui.zhang@intel.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-pm/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git thermal
+F: Documentation/devicetree/bindings/thermal/
+F: drivers/thermal/
+F: include/linux/cpu_cooling.h
+F: include/linux/thermal.h
+F: include/uapi/linux/thermal.h
+F: tools/thermal/
+
+THERMAL DRIVER FOR AMLOGIC SOCS
+M: Guillaume La Roque <glaroque@baylibre.com>
+L: linux-pm@vger.kernel.org
+L: linux-amlogic@lists.infradead.org
+S: Supported
+W: http://linux-meson.com/
+F: Documentation/devicetree/bindings/thermal/amlogic,thermal.yaml
+F: drivers/thermal/amlogic_thermal.c
+
+THERMAL/CPU_COOLING
+M: Amit Daniel Kachhap <amit.kachhap@gmail.com>
+M: Daniel Lezcano <daniel.lezcano@linaro.org>
+M: Viresh Kumar <viresh.kumar@linaro.org>
+R: Lukasz Luba <lukasz.luba@arm.com>
+L: linux-pm@vger.kernel.org
+S: Supported
+F: Documentation/driver-api/thermal/cpu-cooling-api.rst
+F: Documentation/driver-api/thermal/cpu-idle-cooling.rst
+F: drivers/thermal/cpufreq_cooling.c
+F: drivers/thermal/cpuidle_cooling.c
+F: include/linux/cpu_cooling.h
+
+THERMAL/POWER_ALLOCATOR
+M: Lukasz Luba <lukasz.luba@arm.com>
+L: linux-pm@vger.kernel.org
+S: Maintained
+F: Documentation/driver-api/thermal/power_allocator.rst
+F: drivers/thermal/gov_power_allocator.c
+F: include/trace/events/thermal_power_allocator.h
+
+THINKPAD ACPI EXTRAS DRIVER
+M: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
+L: ibm-acpi-devel@lists.sourceforge.net
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+W: http://ibm-acpi.sourceforge.net
+W: http://thinkwiki.org/wiki/Ibm-acpi
+T: git git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git
+F: drivers/platform/x86/thinkpad_acpi.c
+
+THINKPAD LMI DRIVER
+M: Mark Pearson <markpearson@lenovo.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-firmware-attributes
+F: drivers/platform/x86/think-lmi.?
+
+THUNDERBOLT DMA TRAFFIC TEST DRIVER
+M: Isaac Hazan <isaac.hazan@intel.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/thunderbolt/dma_test.c
+
+THUNDERBOLT DRIVER
+M: Andreas Noever <andreas.noever@gmail.com>
+M: Michael Jamet <michael.jamet@intel.com>
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+M: Yehezkel Bernat <YehezkelShB@gmail.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt.git
+F: Documentation/admin-guide/thunderbolt.rst
+F: drivers/thunderbolt/
+F: include/linux/thunderbolt.h
+
+THUNDERBOLT NETWORK DRIVER
+M: Michael Jamet <michael.jamet@intel.com>
+M: Mika Westerberg <mika.westerberg@linux.intel.com>
+M: Yehezkel Bernat <YehezkelShB@gmail.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/thunderbolt.c
+
+THUNDERX GPIO DRIVER
+M: Robert Richter <rric@kernel.org>
+S: Odd Fixes
+F: drivers/gpio/gpio-thunderx.c
+
+TI ADS131E0X ADC SERIES DRIVER
+M: Tomislav Denis <tomislav.denis@avl.com>
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml
+F: drivers/iio/adc/ti-ads131e08.c
+
+TI AM437X VPFE DRIVER
+M: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
+F: drivers/media/platform/am437x/
+
+TI BANDGAP AND THERMAL DRIVER
+M: Eduardo Valentin <edubezval@gmail.com>
+M: Keerthy <j-keerthy@ti.com>
+L: linux-pm@vger.kernel.org
+L: linux-omap@vger.kernel.org
+S: Maintained
+F: drivers/thermal/ti-soc-thermal/
+
+TI BQ27XXX POWER SUPPLY DRIVER
+F: drivers/power/supply/bq27xxx_battery.c
+F: drivers/power/supply/bq27xxx_battery_i2c.c
+F: include/linux/power/bq27xxx_battery.h
+
+TI CDCE706 CLOCK DRIVER
+M: Max Filippov <jcmvbkbc@gmail.com>
+S: Maintained
+F: drivers/clk/clk-cdce706.c
+
+TI CLOCK DRIVER
+M: Tero Kristo <kristo@kernel.org>
+L: linux-omap@vger.kernel.org
+S: Odd Fixes
+F: drivers/clk/ti/
+F: include/linux/clk/ti.h
+
+TI DAVINCI MACHINE SUPPORT
+M: Sekhar Nori <nsekhar@ti.com>
+R: Bartosz Golaszewski <brgl@bgdev.pl>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci.git
+F: Documentation/devicetree/bindings/i2c/i2c-davinci.txt
+F: arch/arm/boot/dts/da850*
+F: arch/arm/mach-davinci/
+F: drivers/i2c/busses/i2c-davinci.c
+
+TI DAVINCI SERIES CLOCK DRIVER
+M: David Lechner <david@lechnology.com>
+R: Sekhar Nori <nsekhar@ti.com>
+S: Maintained
+F: Documentation/devicetree/bindings/clock/ti/davinci/
+F: drivers/clk/davinci/
+
+TI DAVINCI SERIES GPIO DRIVER
+M: Keerthy <j-keerthy@ti.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/gpio-davinci.yaml
+F: drivers/gpio/gpio-davinci.c
+
+TI DAVINCI SERIES MEDIA DRIVER
+M: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
+F: drivers/media/platform/davinci/
+F: include/media/davinci/
+
+TI ENHANCED QUADRATURE ENCODER PULSE (eQEP) DRIVER
+R: David Lechner <david@lechnology.com>
+L: linux-iio@vger.kernel.org
+F: Documentation/devicetree/bindings/counter/ti-eqep.yaml
+F: drivers/counter/ti-eqep.c
+
+TI ETHERNET SWITCH DRIVER (CPSW)
+R: Grygorii Strashko <grygorii.strashko@ti.com>
+L: linux-omap@vger.kernel.org
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/ti/cpsw*
+F: drivers/net/ethernet/ti/davinci*
+
+TI FLASH MEDIA MEMORYSTICK/MMC DRIVERS
+M: Alex Dubov <oakad@yahoo.com>
+S: Maintained
+W: http://tifmxx.berlios.de/
+F: drivers/memstick/host/tifm_ms.c
+F: drivers/misc/tifm*
+F: drivers/mmc/host/tifm_sd.c
+F: include/linux/tifm.h
+
+TI KEYSTONE MULTICORE NAVIGATOR DRIVERS
+M: Santosh Shilimkar <ssantosh@kernel.org>
+L: linux-kernel@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone.git
+F: drivers/soc/ti/*
+
+TI LM49xxx FAMILY ASoC CODEC DRIVERS
+M: M R Swami Reddy <mr.swami.reddy@ti.com>
+M: Vishwas A Deshpande <vishwas.a.deshpande@ti.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: sound/soc/codecs/isabelle*
+F: sound/soc/codecs/lm49453*
+
+TI PCM3060 ASoC CODEC DRIVER
+M: Kirill Marinushkin <kmarinushkin@birdec.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/sound/pcm3060.txt
+F: sound/soc/codecs/pcm3060*
+
+TI TAS571X FAMILY ASoC CODEC DRIVER
+M: Kevin Cernekee <cernekee@chromium.org>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Odd Fixes
+F: sound/soc/codecs/tas571x*
+
+TI TRF7970A NFC DRIVER
+M: Mark Greer <mgreer@animalcreek.com>
+L: linux-wireless@vger.kernel.org
+L: linux-nfc@lists.01.org (subscribers-only)
+S: Supported
+F: Documentation/devicetree/bindings/net/nfc/trf7970a.txt
+F: drivers/nfc/trf7970a.c
+
+TI TSC2046 ADC DRIVER
+M: Oleksij Rempel <o.rempel@pengutronix.de>
+R: kernel@pengutronix.de
+L: linux-iio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/iio/adc/ti,tsc2046.yaml
+F: drivers/iio/adc/ti-tsc2046.c
+
+TI TWL4030 SERIES SOC CODEC DRIVER
+M: Peter Ujfalusi <peter.ujfalusi@gmail.com>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: sound/soc/codecs/twl4030*
+
+TI VPE/CAL DRIVERS
+M: Benoit Parrot <bparrot@ti.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://linuxtv.org/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+F: Documentation/devicetree/bindings/media/ti,cal.yaml
+F: Documentation/devicetree/bindings/media/ti,vpe.yaml
+F: drivers/media/platform/ti-vpe/
+
+TI WILINK WIRELESS DRIVERS
+L: linux-wireless@vger.kernel.org
+S: Orphan
+W: https://wireless.wiki.kernel.org/en/users/Drivers/wl12xx
+W: https://wireless.wiki.kernel.org/en/users/Drivers/wl1251
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx.git
+F: drivers/net/wireless/ti/
+F: include/linux/wl12xx.h
+
+TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER
+M: John Stultz <john.stultz@linaro.org>
+M: Thomas Gleixner <tglx@linutronix.de>
+R: Stephen Boyd <sboyd@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
+F: include/linux/clocksource.h
+F: include/linux/time.h
+F: include/linux/timex.h
+F: include/uapi/linux/time.h
+F: include/uapi/linux/timex.h
+F: kernel/time/alarmtimer.c
+F: kernel/time/clocksource.c
+F: kernel/time/ntp.c
+F: kernel/time/time*.c
+F: tools/testing/selftests/timers/
+
+TIPC NETWORK LAYER
+M: Jon Maloy <jmaloy@redhat.com>
+M: Ying Xue <ying.xue@windriver.com>
+L: netdev@vger.kernel.org (core kernel code)
+L: tipc-discussion@lists.sourceforge.net (user apps, general discussion)
+S: Maintained
+W: http://tipc.sourceforge.net/
+F: include/uapi/linux/tipc*.h
+F: net/tipc/
+
+TLAN NETWORK DRIVER
+M: Samuel Chessman <chessman@tux.org>
+L: tlan-devel@lists.sourceforge.net (subscribers-only)
+S: Maintained
+W: http://sourceforge.net/projects/tlan/
+F: Documentation/networking/device_drivers/ethernet/ti/tlan.rst
+F: drivers/net/ethernet/ti/tlan.*
+
+TM6000 VIDEO4LINUX DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Odd fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/tm6000*
+F: drivers/media/usb/tm6000/
+
+TMIO/SDHI MMC DRIVER
+M: Wolfram Sang <wsa+renesas@sang-engineering.com>
+L: linux-mmc@vger.kernel.org
+S: Supported
+F: drivers/mmc/host/renesas_sdhi*
+F: drivers/mmc/host/tmio_mmc*
+F: include/linux/mfd/tmio.h
+
+TMP401 HARDWARE MONITOR DRIVER
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/tmp401.rst
+F: drivers/hwmon/tmp401.c
+
+TMP513 HARDWARE MONITOR DRIVER
+M: Eric Tremblay <etremblay@distech-controls.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/tmp513.rst
+F: drivers/hwmon/tmp513.c
+
+TMPFS (SHMEM FILESYSTEM)
+M: Hugh Dickins <hughd@google.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: include/linux/shmem_fs.h
+F: mm/shmem.c
+
+TOMOYO SECURITY MODULE
+M: Kentaro Takeda <takedakn@nttdata.co.jp>
+M: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
+L: tomoyo-dev-en@lists.osdn.me (subscribers-only, for developers in English)
+L: tomoyo-users-en@lists.osdn.me (subscribers-only, for users in English)
+L: tomoyo-dev@lists.osdn.me (subscribers-only, for developers in Japanese)
+L: tomoyo-users@lists.osdn.me (subscribers-only, for users in Japanese)
+S: Maintained
+W: https://tomoyo.osdn.jp/
+F: security/tomoyo/
+
+TOPSTAR LAPTOP EXTRAS DRIVER
+M: Herton Ronaldo Krzesinski <herton@canonical.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/topstar-laptop.c
+
+TORTURE-TEST MODULES
+M: Davidlohr Bueso <dave@stgolabs.net>
+M: "Paul E. McKenney" <paulmck@kernel.org>
+M: Josh Triplett <josh@joshtriplett.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
+F: Documentation/RCU/torture.rst
+F: kernel/locking/locktorture.c
+F: kernel/rcu/rcuscale.c
+F: kernel/rcu/rcutorture.c
+F: kernel/rcu/refscale.c
+F: kernel/torture.c
+
+TOSHIBA ACPI EXTRAS DRIVER
+M: Azael Avalos <coproscefalo@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/toshiba_acpi.c
+
+TOSHIBA BLUETOOTH DRIVER
+M: Azael Avalos <coproscefalo@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/toshiba_bluetooth.c
+
+TOSHIBA HDD ACTIVE PROTECTION SENSOR DRIVER
+M: Azael Avalos <coproscefalo@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/toshiba_haps.c
+
+TOSHIBA SMM DRIVER
+M: Jonathan Buzzard <jonathan@buzzard.org.uk>
+S: Maintained
+W: http://www.buzzard.org.uk/toshiba/
+F: drivers/char/toshiba.c
+F: include/linux/toshiba.h
+F: include/uapi/linux/toshiba.h
+
+TOSHIBA TC358743 DRIVER
+M: Mats Randgaard <matrandg@cisco.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/tc358743*
+F: include/media/i2c/tc358743.h
+
+TOSHIBA WMI HOTKEYS DRIVER
+M: Azael Avalos <coproscefalo@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/toshiba-wmi.c
+
+TPM DEVICE DRIVER
+M: Peter Huewe <peterhuewe@gmx.de>
+M: Jarkko Sakkinen <jarkko@kernel.org>
+R: Jason Gunthorpe <jgg@ziepe.ca>
+L: linux-integrity@vger.kernel.org
+S: Maintained
+W: https://kernsec.org/wiki/index.php/Linux_Kernel_Integrity
+Q: https://patchwork.kernel.org/project/linux-integrity/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
+F: drivers/char/tpm/
+
+TRACING
+M: Steven Rostedt <rostedt@goodmis.org>
+M: Ingo Molnar <mingo@redhat.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core
+F: Documentation/trace/ftrace.rst
+F: arch/*/*/*/ftrace.h
+F: arch/*/kernel/ftrace.c
+F: fs/tracefs/
+F: include/*/ftrace.h
+F: include/linux/trace*.h
+F: include/trace/
+F: kernel/trace/
+F: tools/testing/selftests/ftrace/
+
+TRACING MMIO ACCESSES (MMIOTRACE)
+M: Steven Rostedt <rostedt@goodmis.org>
+M: Ingo Molnar <mingo@kernel.org>
+R: Karol Herbst <karolherbst@gmail.com>
+R: Pekka Paalanen <ppaalanen@gmail.com>
+L: linux-kernel@vger.kernel.org
+L: nouveau@lists.freedesktop.org
+S: Maintained
+F: arch/x86/mm/kmmio.c
+F: arch/x86/mm/mmio-mod.c
+F: arch/x86/mm/testmmiotrace.c
+F: include/linux/mmiotrace.h
+F: kernel/trace/trace_mmiotrace.c
+
+TRACING OS NOISE / LATENCY TRACERS
+M: Steven Rostedt <rostedt@goodmis.org>
+M: Daniel Bristot de Oliveira <bristot@kernel.org>
+S: Maintained
+F: kernel/trace/trace_osnoise.c
+F: include/trace/events/osnoise.h
+F: kernel/trace/trace_hwlat.c
+F: kernel/trace/trace_irqsoff.c
+F: kernel/trace/trace_sched_wakeup.c
+F: Documentation/trace/osnoise-tracer.rst
+F: Documentation/trace/timerlat-tracer.rst
+F: Documentation/trace/hwlat_detector.rst
+F: arch/*/kernel/trace.c
+
+TRADITIONAL CHINESE DOCUMENTATION
+M: Hu Haowen <src.res@email.cn>
+L: linux-doc-tw-discuss@lists.sourceforge.net
+S: Maintained
+W: https://github.com/srcres258/linux-doc
+T: git git://github.com/srcres258/linux-doc.git doc-zh-tw
+F: Documentation/translations/zh_TW/
+
+TRIVIAL PATCHES
+M: Jiri Kosina <trivial@kernel.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial.git
+K: ^Subject:.*(?i)trivial
+
+TTY LAYER
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+M: Jiri Slaby <jirislaby@kernel.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
+F: Documentation/driver-api/serial/
+F: drivers/tty/
+F: drivers/tty/serial/serial_core.c
+F: include/linux/selection.h
+F: include/linux/serial.h
+F: include/linux/serial_core.h
+F: include/linux/sysrq.h
+F: include/linux/tty*.h
+F: include/linux/vt.h
+F: include/linux/vt_*.h
+F: include/uapi/linux/serial.h
+F: include/uapi/linux/serial_core.h
+F: include/uapi/linux/tty.h
+
+TUA9001 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+W: http://palosaari.fi/linux/
+Q: http://patchwork.linuxtv.org/project/linux-media/list/
+T: git git://linuxtv.org/anttip/media_tree.git
+F: drivers/media/tuners/tua9001*
+
+TULIP NETWORK DRIVERS
+L: netdev@vger.kernel.org
+L: linux-parisc@vger.kernel.org
+S: Orphan
+F: drivers/net/ethernet/dec/tulip/
+
+TUN/TAP driver
+M: Maxim Krasnyansky <maxk@qti.qualcomm.com>
+S: Maintained
+W: http://vtun.sourceforge.net/tun
+F: Documentation/networking/tuntap.rst
+F: arch/um/os-Linux/drivers/
+
+TURBOCHANNEL SUBSYSTEM
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+M: Ralf Baechle <ralf@linux-mips.org>
+L: linux-mips@vger.kernel.org
+S: Maintained
+Q: http://patchwork.linux-mips.org/project/linux-mips/list/
+F: drivers/tc/
+F: include/linux/tc.h
+
+TURBOSTAT UTILITY
+M: "Len Brown" <lenb@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+Q: https://patchwork.kernel.org/project/linux-pm/list/
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git turbostat
+F: tools/power/x86/turbostat/
+
+TW5864 VIDEO4LINUX DRIVER
+M: Bluecherry Maintainers <maintainers@bluecherrydvr.com>
+M: Anton Sviridenko <anton@corp.bluecherry.net>
+M: Andrey Utkin <andrey.utkin@corp.bluecherry.net>
+M: Andrey Utkin <andrey_utkin@fastmail.com>
+L: linux-media@vger.kernel.org
+S: Supported
+F: drivers/media/pci/tw5864/
+
+TW68 VIDEO4LINUX DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Odd Fixes
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/tw68/
+
+TW686X VIDEO4LINUX DRIVER
+M: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/pci/tw686x/
+
+UACCE ACCELERATOR FRAMEWORK
+M: Zhangfei Gao <zhangfei.gao@linaro.org>
+M: Zhou Wang <wangzhou1@hisilicon.com>
+L: linux-accelerators@lists.ozlabs.org
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-driver-uacce
+F: Documentation/misc-devices/uacce.rst
+F: drivers/misc/uacce/
+F: include/linux/uacce.h
+F: include/uapi/misc/uacce/
+
+UBI FILE SYSTEM (UBIFS)
+M: Richard Weinberger <richard@nod.at>
+L: linux-mtd@lists.infradead.org
+S: Supported
+W: http://www.linux-mtd.infradead.org/doc/ubifs.html
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git fixes
+F: Documentation/filesystems/ubifs-authentication.rst
+F: Documentation/filesystems/ubifs.rst
+F: fs/ubifs/
+
+UCLINUX (M68KNOMMU AND COLDFIRE)
+M: Greg Ungerer <gerg@linux-m68k.org>
+L: linux-m68k@lists.linux-m68k.org
+L: uclinux-dev@uclinux.org (subscribers-only)
+S: Maintained
+W: http://www.linux-m68k.org/
+W: http://www.uclinux.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu.git
+F: arch/m68k/*/*_no.*
+F: arch/m68k/68*/
+F: arch/m68k/coldfire/
+F: arch/m68k/include/asm/*_no.*
+
+UDF FILESYSTEM
+M: Jan Kara <jack@suse.com>
+S: Maintained
+F: Documentation/filesystems/udf.rst
+F: fs/udf/
+
+UDRAW TABLET
+M: Bastien Nocera <hadess@hadess.net>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-udraw-ps3.c
+
+UFS FILESYSTEM
+M: Evgeniy Dushistov <dushistov@mail.ru>
+S: Maintained
+F: Documentation/admin-guide/ufs.rst
+F: fs/ufs/
+
+UHID USERSPACE HID IO DRIVER
+M: David Rheinsberg <david.rheinsberg@gmail.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/uhid.c
+F: include/uapi/linux/uhid.h
+
+ULPI BUS
+M: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/common/ulpi.c
+F: include/linux/ulpi/
+
+UNICODE SUBSYSTEM
+M: Gabriel Krisman Bertazi <krisman@collabora.com>
+L: linux-fsdevel@vger.kernel.org
+S: Supported
+F: fs/unicode/
+
+UNIFDEF
+M: Tony Finch <dot@dotat.at>
+S: Maintained
+W: http://dotat.at/prog/unifdef
+F: scripts/unifdef.c
+
+UNIFORM CDROM DRIVER
+M: Phillip Potter <phil@philpotter.co.uk>
+S: Maintained
+F: Documentation/cdrom/
+F: drivers/cdrom/cdrom.c
+F: include/linux/cdrom.h
+F: include/uapi/linux/cdrom.h
+
+UNISYS S-PAR DRIVERS
+M: David Kershner <david.kershner@unisys.com>
+L: sparmaintainer@unisys.com (Unisys internal)
+S: Supported
+F: drivers/staging/unisys/
+F: drivers/visorbus/
+F: include/linux/visorbus.h
+
+UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER
+R: Alim Akhtar <alim.akhtar@samsung.com>
+R: Avri Altman <avri.altman@wdc.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: Documentation/scsi/ufs.rst
+F: drivers/scsi/ufs/
+
+UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER DWC HOOKS
+M: Pedro Sousa <pedrom.sousa@synopsys.com>
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/ufs/*dwc*
+
+UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER MEDIATEK HOOKS
+M: Stanley Chu <stanley.chu@mediatek.com>
+L: linux-scsi@vger.kernel.org
+L: linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/scsi/ufs/ufs-mediatek*
+
+UNSORTED BLOCK IMAGES (UBI)
+M: Richard Weinberger <richard@nod.at>
+L: linux-mtd@lists.infradead.org
+S: Supported
+W: http://www.linux-mtd.infradead.org/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git fixes
+F: drivers/mtd/ubi/
+F: include/linux/mtd/ubi.h
+F: include/uapi/mtd/ubi-user.h
+
+USB "USBNET" DRIVER FRAMEWORK
+M: Oliver Neukum <oneukum@suse.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.linux-usb.org/usbnet
+F: drivers/net/usb/usbnet.c
+F: include/linux/usb/usbnet.h
+
+USB ACM DRIVER
+M: Oliver Neukum <oneukum@suse.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/usb/acm.rst
+F: drivers/usb/class/cdc-acm.*
+
+USB APPLE MFI FASTCHARGE DRIVER
+M: Bastien Nocera <hadess@hadess.net>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/misc/apple-mfi-fastcharge.c
+
+USB AR5523 WIRELESS DRIVER
+M: Pontus Fuchs <pontus.fuchs@gmail.com>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/ath/ar5523/
+
+USB ATTACHED SCSI
+M: Oliver Neukum <oneukum@suse.com>
+L: linux-usb@vger.kernel.org
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/usb/storage/uas.c
+
+USB CDC ETHERNET DRIVER
+M: Oliver Neukum <oliver@neukum.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/net/usb/cdc_*.c
+F: include/uapi/linux/usb/cdc.h
+
+USB CHAOSKEY DRIVER
+M: Keith Packard <keithp@keithp.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/misc/chaoskey.c
+
+USB CYPRESS C67X00 DRIVER
+L: linux-usb@vger.kernel.org
+S: Orphan
+F: drivers/usb/c67x00/
+
+USB DAVICOM DM9601 DRIVER
+M: Peter Korsgaard <peter@korsgaard.com>
+L: netdev@vger.kernel.org
+S: Maintained
+W: http://www.linux-usb.org/usbnet
+F: drivers/net/usb/dm9601.c
+
+USB EHCI DRIVER
+M: Alan Stern <stern@rowland.harvard.edu>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/usb/ehci.rst
+F: drivers/usb/host/ehci*
+
+USB GADGET/PERIPHERAL SUBSYSTEM
+M: Felipe Balbi <balbi@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+W: http://www.linux-usb.org/gadget
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
+F: drivers/usb/gadget/
+F: include/linux/usb/gadget*
+
+USB HID/HIDBP DRIVERS (USB KEYBOARDS, MICE, REMOTE CONTROLS, ...)
+M: Jiri Kosina <jikos@kernel.org>
+M: Benjamin Tissoires <benjamin.tissoires@redhat.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git
+F: Documentation/hid/hiddev.rst
+F: drivers/hid/usbhid/
+
+USB INTEL XHCI ROLE MUX DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/roles/intel-xhci-usb-role-switch.c
+
+USB IP DRIVER FOR HISILICON KIRIN 960
+M: Yu Chen <chenyu56@huawei.com>
+M: Binghui Wang <wangbinghui@hisilicon.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/phy/hisilicon,hi3660-usb3.yaml
+F: drivers/phy/hisilicon/phy-hi3660-usb3.c
+
+USB IP DRIVER FOR HISILICON KIRIN 970
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/phy/hisilicon,hi3670-usb3.yaml
+F: drivers/phy/hisilicon/phy-hi3670-usb3.c
+
+USB ISP116X DRIVER
+M: Olav Kongas <ok@artecdesign.ee>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/host/isp116x*
+F: include/linux/usb/isp116x.h
+
+USB ISP1760 DRIVER
+M: Rui Miguel Silva <rui.silva@linaro.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/isp1760/*
+F: Documentation/devicetree/bindings/usb/nxp,isp1760.yaml
+
+USB LAN78XX ETHERNET DRIVER
+M: Woojung Huh <woojung.huh@microchip.com>
+M: UNGLinuxDriver@microchip.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/microchip,lan78xx.txt
+F: drivers/net/usb/lan78xx.*
+F: include/dt-bindings/net/microchip-lan78xx.h
+
+USB MASS STORAGE DRIVER
+M: Alan Stern <stern@rowland.harvard.edu>
+L: linux-usb@vger.kernel.org
+L: usb-storage@lists.one-eyed-alien.net
+S: Maintained
+F: drivers/usb/storage/
+
+USB MIDI DRIVER
+M: Clemens Ladisch <clemens@ladisch.de>
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
+F: sound/usb/midi.*
+
+USB NETWORKING DRIVERS
+L: linux-usb@vger.kernel.org
+S: Odd Fixes
+F: drivers/net/usb/
+
+USB OHCI DRIVER
+M: Alan Stern <stern@rowland.harvard.edu>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/usb/ohci.rst
+F: drivers/usb/host/ohci*
+
+USB OTG FSM (Finite State Machine)
+M: Peter Chen <peter.chen@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F: drivers/usb/common/usb-otg-fsm.c
+
+USB OVER IP DRIVER
+M: Valentina Manea <valentina.manea.m@gmail.com>
+M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/usb/usbip_protocol.rst
+F: drivers/usb/usbip/
+F: tools/testing/selftests/drivers/usb/usbip/
+F: tools/usb/usbip/
+
+USB PEGASUS DRIVER
+M: Petko Manolov <petkan@nucleusys.com>
+L: linux-usb@vger.kernel.org
+L: netdev@vger.kernel.org
+S: Maintained
+W: https://github.com/petkan/pegasus
+T: git git://github.com/petkan/pegasus.git
+F: drivers/net/usb/pegasus.*
+
+USB PHY LAYER
+M: Felipe Balbi <balbi@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git
+F: drivers/usb/phy/
+
+USB PRINTER DRIVER (usblp)
+M: Pete Zaitcev <zaitcev@redhat.com>
+L: linux-usb@vger.kernel.org
+S: Supported
+F: drivers/usb/class/usblp.c
+
+USB RAW GADGET DRIVER
+R: Andrey Konovalov <andreyknvl@gmail.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/usb/raw-gadget.rst
+F: drivers/usb/gadget/legacy/raw_gadget.c
+F: include/uapi/linux/usb/raw_gadget.h
+
+USB QMI WWAN NETWORK DRIVER
+M: Bjørn Mork <bjorn@mork.no>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-net-qmi
+F: drivers/net/usb/qmi_wwan.c
+
+USB RTL8150 DRIVER
+M: Petko Manolov <petkan@nucleusys.com>
+L: linux-usb@vger.kernel.org
+L: netdev@vger.kernel.org
+S: Maintained
+W: https://github.com/petkan/rtl8150
+T: git git://github.com/petkan/rtl8150.git
+F: drivers/net/usb/rtl8150.c
+
+USB SERIAL SUBSYSTEM
+M: Johan Hovold <johan@kernel.org>
+L: linux-usb@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git
+F: Documentation/usb/usb-serial.rst
+F: drivers/usb/serial/
+F: include/linux/usb/serial.h
+
+USB SMSC75XX ETHERNET DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/usb/smsc75xx.*
+
+USB SMSC95XX ETHERNET DRIVER
+M: Steve Glendinning <steve.glendinning@shawell.net>
+M: UNGLinuxDriver@microchip.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/usb/smsc95xx.*
+
+USB SUBSYSTEM
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-usb@vger.kernel.org
+S: Supported
+W: http://www.linux-usb.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
+F: Documentation/devicetree/bindings/usb/
+F: Documentation/usb/
+F: drivers/usb/
+F: include/linux/usb.h
+F: include/linux/usb/
+
+USB TYPEC BUS FOR ALTERNATE MODES
+M: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-typec
+F: Documentation/driver-api/usb/typec_bus.rst
+F: drivers/usb/typec/altmodes/
+F: include/linux/usb/typec_altmode.h
+
+USB TYPEC CLASS
+M: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-typec
+F: Documentation/driver-api/usb/typec.rst
+F: drivers/usb/typec/
+F: include/linux/usb/typec.h
+
+USB TYPEC INTEL PMC MUX DRIVER
+M: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: Documentation/firmware-guide/acpi/intel-pmc-mux.rst
+F: drivers/usb/typec/mux/intel_pmc_mux.c
+
+USB TYPEC PI3USB30532 MUX DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/typec/mux/pi3usb30532.c
+
+USB TYPEC PORT CONTROLLER DRIVERS
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/typec/tcpm/
+
+USB UHCI DRIVER
+M: Alan Stern <stern@rowland.harvard.edu>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/host/uhci*
+
+USB VIDEO CLASS
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-uvc-devel@lists.sourceforge.net (subscribers-only)
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://www.ideasonboard.org/uvc/
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/usb/uvc/
+F: include/uapi/linux/uvcvideo.h
+
+USB WEBCAM GADGET
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-usb@vger.kernel.org
+S: Maintained
+F: drivers/usb/gadget/function/*uvc*
+F: drivers/usb/gadget/legacy/webcam.c
+F: include/uapi/linux/usb/g_uvc.h
+
+USB WIRELESS RNDIS DRIVER (rndis_wlan)
+M: Jussi Kivilinna <jussi.kivilinna@iki.fi>
+L: linux-wireless@vger.kernel.org
+S: Maintained
+F: drivers/net/wireless/rndis_wlan.c
+
+USB XHCI DRIVER
+M: Mathias Nyman <mathias.nyman@intel.com>
+L: linux-usb@vger.kernel.org
+S: Supported
+F: drivers/usb/host/pci-quirks*
+F: drivers/usb/host/xhci*
+
+USB ZD1201 DRIVER
+L: linux-wireless@vger.kernel.org
+S: Orphan
+W: http://linux-lc100020.sourceforge.net
+F: drivers/net/wireless/zydas/zd1201.*
+
+USB ZR364XX DRIVER
+M: Antoine Jacquet <royale@zerezo.com>
+L: linux-usb@vger.kernel.org
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://royale.zerezo.com/zr364xx/
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/admin-guide/media/zr364xx*
+F: drivers/media/usb/zr364xx/
+
+USER-MODE LINUX (UML)
+M: Jeff Dike <jdike@addtoit.com>
+M: Richard Weinberger <richard@nod.at>
+M: Anton Ivanov <anton.ivanov@cambridgegreys.com>
+L: linux-um@lists.infradead.org
+S: Maintained
+W: http://user-mode-linux.sourceforge.net
+Q: https://patchwork.ozlabs.org/project/linux-um/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml.git
+F: Documentation/virt/uml/
+F: arch/um/
+F: arch/x86/um/
+F: fs/hostfs/
+
+USERSPACE COPYIN/COPYOUT (UIOVEC)
+M: Alexander Viro <viro@zeniv.linux.org.uk>
+S: Maintained
+F: include/linux/uio.h
+F: lib/iov_iter.c
+
+USERSPACE DMA BUFFER DRIVER
+M: Gerd Hoffmann <kraxel@redhat.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/dma-buf/udmabuf.c
+F: include/uapi/linux/udmabuf.h
+
+USERSPACE I/O (UIO)
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
+F: Documentation/driver-api/uio-howto.rst
+F: drivers/uio/
+F: include/linux/uio_driver.h
+
+UTIL-LINUX PACKAGE
+M: Karel Zak <kzak@redhat.com>
+L: util-linux@vger.kernel.org
+S: Maintained
+W: http://en.wikipedia.org/wiki/Util-linux
+T: git git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git
+
+UUID HELPERS
+M: Christoph Hellwig <hch@lst.de>
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.infradead.org/users/hch/uuid.git
+F: include/linux/uuid.h
+F: include/uapi/linux/uuid.h
+F: lib/test_uuid.c
+F: lib/uuid.c
+
+UV SYSFS DRIVER
+M: Justin Ernst <justin.ernst@hpe.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/uv_sysfs.c
+
+UVESAFB DRIVER
+M: Michal Januszewski <spock@gentoo.org>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+W: https://github.com/mjanusz/v86d
+F: Documentation/fb/uvesafb.rst
+F: drivers/video/fbdev/uvesafb.*
+
+Ux500 CLOCK DRIVERS
+M: Ulf Hansson <ulf.hansson@linaro.org>
+L: linux-clk@vger.kernel.org
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/clk/ux500/
+
+VF610 NAND DRIVER
+M: Stefan Agner <stefan@agner.ch>
+L: linux-mtd@lists.infradead.org
+S: Supported
+F: drivers/mtd/nand/raw/vf610_nfc.c
+
+VFAT/FAT/MSDOS FILESYSTEM
+M: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
+S: Maintained
+F: Documentation/filesystems/vfat.rst
+F: fs/fat/
+
+VFIO DRIVER
+M: Alex Williamson <alex.williamson@redhat.com>
+R: Cornelia Huck <cohuck@redhat.com>
+L: kvm@vger.kernel.org
+S: Maintained
+T: git git://github.com/awilliam/linux-vfio.git
+F: Documentation/driver-api/vfio.rst
+F: drivers/vfio/
+F: include/linux/vfio.h
+F: include/linux/vfio_pci_core.h
+F: include/uapi/linux/vfio.h
+
+VFIO FSL-MC DRIVER
+M: Diana Craciun <diana.craciun@oss.nxp.com>
+L: kvm@vger.kernel.org
+S: Maintained
+F: drivers/vfio/fsl-mc/
+
+VFIO MEDIATED DEVICE DRIVERS
+M: Kirti Wankhede <kwankhede@nvidia.com>
+L: kvm@vger.kernel.org
+S: Maintained
+F: Documentation/driver-api/vfio-mediated-device.rst
+F: drivers/vfio/mdev/
+F: include/linux/mdev.h
+F: samples/vfio-mdev/
+
+VFIO PLATFORM DRIVER
+M: Eric Auger <eric.auger@redhat.com>
+L: kvm@vger.kernel.org
+S: Maintained
+F: drivers/vfio/platform/
+
+VGA_SWITCHEROO
+R: Lukas Wunner <lukas@wunner.de>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/gpu/vga-switcheroo.rst
+F: drivers/gpu/vga/vga_switcheroo.c
+F: include/linux/vga_switcheroo.h
+
+VIA RHINE NETWORK DRIVER
+S: Maintained
+M: Kevin Brace <kevinbrace@bracecomputerlab.com>
+F: drivers/net/ethernet/via/via-rhine.c
+
+VIA SD/MMC CARD CONTROLLER DRIVER
+M: Bruce Chang <brucechang@via.com.tw>
+M: Harald Welte <HaraldWelte@viatech.com>
+S: Maintained
+F: drivers/mmc/host/via-sdmmc.c
+
+VIA UNICHROME(PRO)/CHROME9 FRAMEBUFFER DRIVER
+M: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/fbdev/via/
+F: include/linux/via-core.h
+F: include/linux/via-gpio.h
+F: include/linux/via_i2c.h
+
+VIA VELOCITY NETWORK DRIVER
+M: Francois Romieu <romieu@fr.zoreil.com>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/ethernet/via/via-velocity.*
+
+VICODEC VIRTUAL CODEC DRIVER
+M: Hans Verkuil <hverkuil-cisco@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/test-drivers/vicodec/*
+
+VIDEO I2C POLLING DRIVER
+M: Matt Ranostay <matt.ranostay@konsulko.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/i2c/video-i2c.c
+
+VIDEO MULTIPLEXER DRIVER
+M: Philipp Zabel <p.zabel@pengutronix.de>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/platform/video-mux.c
+
+VIDEOBUF2 FRAMEWORK
+M: Tomasz Figa <tfiga@chromium.org>
+M: Marek Szyprowski <m.szyprowski@samsung.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+F: drivers/media/common/videobuf2/*
+F: include/media/videobuf2-*
+
+VIMC VIRTUAL MEDIA CONTROLLER DRIVER
+M: Helen Koike <helen.koike@collabora.com>
+R: Shuah Khan <skhan@linuxfoundation.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/test-drivers/vimc/*
+
+VIRT LIB
+M: Alex Williamson <alex.williamson@redhat.com>
+M: Paolo Bonzini <pbonzini@redhat.com>
+L: kvm@vger.kernel.org
+S: Supported
+F: virt/lib/
+
+VIRTIO AND VHOST VSOCK DRIVER
+M: Stefan Hajnoczi <stefanha@redhat.com>
+M: Stefano Garzarella <sgarzare@redhat.com>
+L: kvm@vger.kernel.org
+L: virtualization@lists.linux-foundation.org
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/vhost/vsock.c
+F: include/linux/virtio_vsock.h
+F: include/uapi/linux/virtio_vsock.h
+F: net/vmw_vsock/virtio_transport.c
+F: net/vmw_vsock/virtio_transport_common.c
+
+VIRTIO BLOCK AND SCSI DRIVERS
+M: "Michael S. Tsirkin" <mst@redhat.com>
+M: Jason Wang <jasowang@redhat.com>
+R: Paolo Bonzini <pbonzini@redhat.com>
+R: Stefan Hajnoczi <stefanha@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/block/virtio_blk.c
+F: drivers/scsi/virtio_scsi.c
+F: drivers/vhost/scsi.c
+F: include/uapi/linux/virtio_blk.h
+F: include/uapi/linux/virtio_scsi.h
+
+VIRTIO CONSOLE DRIVER
+M: Amit Shah <amit@kernel.org>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/char/virtio_console.c
+F: include/linux/virtio_console.h
+F: include/uapi/linux/virtio_console.h
+
+VIRTIO CORE AND NET DRIVERS
+M: "Michael S. Tsirkin" <mst@redhat.com>
+M: Jason Wang <jasowang@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: Documentation/devicetree/bindings/virtio/
+F: drivers/block/virtio_blk.c
+F: drivers/crypto/virtio/
+F: drivers/net/virtio_net.c
+F: drivers/vdpa/
+F: drivers/virtio/
+F: include/linux/vdpa.h
+F: include/linux/virtio*.h
+F: include/uapi/linux/virtio_*.h
+F: tools/virtio/
+
+VIRTIO BALLOON
+M: "Michael S. Tsirkin" <mst@redhat.com>
+M: David Hildenbrand <david@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/virtio/virtio_balloon.c
+F: include/uapi/linux/virtio_balloon.h
+F: include/linux/balloon_compaction.h
+F: mm/balloon_compaction.c
+
+VIRTIO CRYPTO DRIVER
+M: Gonglei <arei.gonglei@huawei.com>
+L: virtualization@lists.linux-foundation.org
+L: linux-crypto@vger.kernel.org
+S: Maintained
+F: drivers/crypto/virtio/
+F: include/uapi/linux/virtio_crypto.h
+
+VIRTIO DRIVERS FOR S390
+M: Cornelia Huck <cohuck@redhat.com>
+M: Halil Pasic <pasic@linux.ibm.com>
+L: linux-s390@vger.kernel.org
+L: virtualization@lists.linux-foundation.org
+L: kvm@vger.kernel.org
+S: Supported
+F: arch/s390/include/uapi/asm/virtio-ccw.h
+F: drivers/s390/virtio/
+
+VIRTIO FILE SYSTEM
+M: Vivek Goyal <vgoyal@redhat.com>
+M: Stefan Hajnoczi <stefanha@redhat.com>
+M: Miklos Szeredi <miklos@szeredi.hu>
+L: virtualization@lists.linux-foundation.org
+L: linux-fsdevel@vger.kernel.org
+S: Supported
+W: https://virtio-fs.gitlab.io/
+F: Documentation/filesystems/virtiofs.rst
+F: fs/fuse/virtio_fs.c
+F: include/uapi/linux/virtio_fs.h
+
+VIRTIO GPIO DRIVER
+M: Enrico Weigelt, metux IT consult <info@metux.net>
+M: Viresh Kumar <vireshk@kernel.org>
+L: linux-gpio@vger.kernel.org
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/gpio/gpio-virtio.c
+F: include/uapi/linux/virtio_gpio.h
+
+VIRTIO GPU DRIVER
+M: David Airlie <airlied@linux.ie>
+M: Gerd Hoffmann <kraxel@redhat.com>
+L: dri-devel@lists.freedesktop.org
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/virtio/
+F: include/uapi/linux/virtio_gpu.h
+
+VIRTIO HOST (VHOST)
+M: "Michael S. Tsirkin" <mst@redhat.com>
+M: Jason Wang <jasowang@redhat.com>
+L: kvm@vger.kernel.org
+L: virtualization@lists.linux-foundation.org
+L: netdev@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
+F: drivers/vhost/
+F: include/linux/vhost_iotlb.h
+F: include/uapi/linux/vhost.h
+
+VIRTIO INPUT DRIVER
+M: Gerd Hoffmann <kraxel@redhat.com>
+S: Maintained
+F: drivers/virtio/virtio_input.c
+F: include/uapi/linux/virtio_input.h
+
+VIRTIO IOMMU DRIVER
+M: Jean-Philippe Brucker <jean-philippe@linaro.org>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/iommu/virtio-iommu.c
+F: include/uapi/linux/virtio_iommu.h
+
+VIRTIO MEM DRIVER
+M: David Hildenbrand <david@redhat.com>
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+W: https://virtio-mem.gitlab.io/
+F: drivers/virtio/virtio_mem.c
+F: include/uapi/linux/virtio_mem.h
+
+VIRTIO SOUND DRIVER
+M: Anton Yakovlev <anton.yakovlev@opensynergy.com>
+M: "Michael S. Tsirkin" <mst@redhat.com>
+L: virtualization@lists.linux-foundation.org
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Maintained
+F: include/uapi/linux/virtio_snd.h
+F: sound/virtio/*
+
+VIRTIO I2C DRIVER
+M: Jie Deng <jie.deng@intel.com>
+M: Viresh Kumar <viresh.kumar@linaro.org>
+L: linux-i2c@vger.kernel.org
+L: virtualization@lists.linux-foundation.org
+S: Maintained
+F: drivers/i2c/busses/i2c-virtio.c
+F: include/uapi/linux/virtio_i2c.h
+
+VIRTUAL BOX GUEST DEVICE DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+M: Arnd Bergmann <arnd@arndb.de>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S: Maintained
+F: drivers/virt/vboxguest/
+F: include/linux/vbox_utils.h
+F: include/uapi/linux/vbox*.h
+
+VIRTUAL BOX SHARED FOLDER VFS DRIVER
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+F: fs/vboxsf/*
+
+VIRTUAL SERIO DEVICE DRIVER
+M: Stephen Chandler Paul <thatslyude@gmail.com>
+S: Maintained
+F: drivers/input/serio/userio.c
+F: include/uapi/linux/userio.h
+
+VIVID VIRTUAL VIDEO DRIVER
+M: Hans Verkuil <hverkuil@xs4all.nl>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/test-drivers/vivid/*
+
+VIDTV VIRTUAL DIGITAL TV DRIVER
+M: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/test-drivers/vidtv/*
+
+VLYNQ BUS
+M: Florian Fainelli <f.fainelli@gmail.com>
+L: openwrt-devel@lists.openwrt.org (subscribers-only)
+S: Maintained
+F: drivers/vlynq/vlynq.c
+F: include/linux/vlynq.h
+
+VME SUBSYSTEM
+M: Martyn Welch <martyn@welchs.me.uk>
+M: Manohar Vanga <manohar.vanga@gmail.com>
+M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
+F: Documentation/driver-api/vme.rst
+F: drivers/staging/vme/
+F: drivers/vme/
+F: include/linux/vme*
+
+VM SOCKETS (AF_VSOCK)
+M: Stefano Garzarella <sgarzare@redhat.com>
+L: virtualization@lists.linux-foundation.org
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/vsockmon.c
+F: include/net/af_vsock.h
+F: include/uapi/linux/vm_sockets.h
+F: include/uapi/linux/vm_sockets_diag.h
+F: include/uapi/linux/vsockmon.h
+F: net/vmw_vsock/
+F: tools/testing/vsock/
+
+VMWARE BALLOON DRIVER
+M: Nadav Amit <namit@vmware.com>
+M: "VMware, Inc." <pv-drivers@vmware.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/misc/vmw_balloon.c
+
+VMWARE HYPERVISOR INTERFACE
+M: Deep Shah <sdeep@vmware.com>
+M: "VMware, Inc." <pv-drivers@vmware.com>
+L: virtualization@lists.linux-foundation.org
+S: Supported
+F: arch/x86/include/asm/vmware.h
+F: arch/x86/kernel/cpu/vmware.c
+
+VMWARE PVRDMA DRIVER
+M: Adit Ranadive <aditr@vmware.com>
+M: VMware PV-Drivers <pv-drivers@vmware.com>
+L: linux-rdma@vger.kernel.org
+S: Maintained
+F: drivers/infiniband/hw/vmw_pvrdma/
+
+VMware PVSCSI driver
+M: Vishal Bhakta <vbhakta@vmware.com>
+M: VMware PV-Drivers <pv-drivers@vmware.com>
+L: linux-scsi@vger.kernel.org
+S: Maintained
+F: drivers/scsi/vmw_pvscsi.c
+F: drivers/scsi/vmw_pvscsi.h
+
+VMWARE VIRTUAL PTP CLOCK DRIVER
+M: Vivek Thampi <vithampi@vmware.com>
+M: "VMware, Inc." <pv-drivers@vmware.com>
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/ptp/ptp_vmw.c
+
+VMWARE VMCI DRIVER
+M: Jorgen Hansen <jhansen@vmware.com>
+M: Vishnu Dasa <vdasa@vmware.com>
+L: linux-kernel@vger.kernel.org
+L: pv-drivers@vmware.com (private)
+S: Maintained
+F: drivers/misc/vmw_vmci/
+
+VMWARE VMMOUSE SUBDRIVER
+M: "VMware Graphics" <linux-graphics-maintainer@vmware.com>
+M: "VMware, Inc." <pv-drivers@vmware.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/mouse/vmmouse.c
+F: drivers/input/mouse/vmmouse.h
+
+VMWARE VMXNET3 ETHERNET DRIVER
+M: Ronak Doshi <doshir@vmware.com>
+M: pv-drivers@vmware.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/vmxnet3/
+
+VOCORE VOCORE2 BOARD
+M: Harvey Hunt <harveyhuntnexus@gmail.com>
+L: linux-mips@vger.kernel.org
+S: Maintained
+F: arch/mips/boot/dts/ralink/vocore2.dts
+
+VOLTAGE AND CURRENT REGULATOR FRAMEWORK
+M: Liam Girdwood <lgirdwood@gmail.com>
+M: Mark Brown <broonie@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Supported
+W: http://www.slimlogic.co.uk/?p=48
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git
+F: Documentation/devicetree/bindings/regulator/
+F: Documentation/power/regulator/
+F: drivers/regulator/
+F: include/dt-bindings/regulator/
+F: include/linux/regulator/
+K: regulator_get_optional
+
+VOLTAGE AND CURRENT REGULATOR IRQ HELPERS
+R: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
+F: drivers/regulator/irq_helpers.c
+
+VRF
+M: David Ahern <dsahern@kernel.org>
+L: netdev@vger.kernel.org
+S: Maintained
+F: Documentation/networking/vrf.rst
+F: drivers/net/vrf.c
+
+VSPRINTF
+M: Petr Mladek <pmladek@suse.com>
+M: Steven Rostedt <rostedt@goodmis.org>
+M: Sergey Senozhatsky <senozhatsky@chromium.org>
+R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+R: Rasmus Villemoes <linux@rasmusvillemoes.dk>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk.git
+F: Documentation/core-api/printk-formats.rst
+F: lib/test_printf.c
+F: lib/test_scanf.c
+F: lib/vsprintf.c
+
+VT1211 HARDWARE MONITOR DRIVER
+M: Juerg Haefliger <juergh@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/vt1211.rst
+F: drivers/hwmon/vt1211.c
+
+VT8231 HARDWARE MONITOR DRIVER
+M: Roger Lucas <vt8231@hiddenengine.co.uk>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/vt8231.c
+
+VUB300 USB to SDIO/SD/MMC bridge chip
+L: linux-mmc@vger.kernel.org
+S: Orphan
+F: drivers/mmc/host/vub300.c
+
+W1 DALLAS'S 1-WIRE BUS
+M: Evgeniy Polyakov <zbr@ioremap.net>
+S: Maintained
+F: Documentation/devicetree/bindings/w1/
+F: Documentation/w1/
+F: drivers/w1/
+F: include/linux/w1.h
+
+W83791D HARDWARE MONITORING DRIVER
+M: Marc Hulsman <m.hulsman@tudelft.nl>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/w83791d.rst
+F: drivers/hwmon/w83791d.c
+
+W83793 HARDWARE MONITORING DRIVER
+M: Rudolf Marek <r.marek@assembler.cz>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/w83793.rst
+F: drivers/hwmon/w83793.c
+
+W83795 HARDWARE MONITORING DRIVER
+M: Jean Delvare <jdelvare@suse.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/w83795.c
+
+W83L51xD SD/MMC CARD INTERFACE DRIVER
+M: Pierre Ossman <pierre@ossman.eu>
+S: Maintained
+F: drivers/mmc/host/wbsd.*
+
+WACOM PROTOCOL 4 SERIAL TABLETS
+M: Julian Squires <julian@cipht.net>
+M: Hans de Goede <hdegoede@redhat.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/input/tablet/wacom_serial4.c
+
+WATCHDOG DEVICE DRIVERS
+M: Wim Van Sebroeck <wim@linux-watchdog.org>
+M: Guenter Roeck <linux@roeck-us.net>
+L: linux-watchdog@vger.kernel.org
+S: Maintained
+W: http://www.linux-watchdog.org/
+T: git git://www.linux-watchdog.org/linux-watchdog.git
+F: Documentation/devicetree/bindings/watchdog/
+F: Documentation/watchdog/
+F: drivers/watchdog/
+F: include/linux/watchdog.h
+F: include/uapi/linux/watchdog.h
+
+WHISKEYCOVE PMIC GPIO DRIVER
+M: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-wcove.c
+
+WHWAVE RTC DRIVER
+M: Dianlong Li <long17.cool@163.com>
+L: linux-rtc@vger.kernel.org
+S: Maintained
+F: drivers/rtc/rtc-sd3078.c
+
+WIIMOTE HID DRIVER
+M: David Rheinsberg <david.rheinsberg@gmail.com>
+L: linux-input@vger.kernel.org
+S: Maintained
+F: drivers/hid/hid-wiimote*
+
+WILOCITY WIL6210 WIRELESS DRIVER
+M: Maya Erez <merez@codeaurora.org>
+L: linux-wireless@vger.kernel.org
+L: wil6210@qti.qualcomm.com
+S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/wil6210
+F: drivers/net/wireless/ath/wil6210/
+
+WINBOND CIR DRIVER
+M: David Härdeman <david@hardeman.nu>
+S: Maintained
+F: drivers/media/rc/winbond-cir.c
+
+WINSYSTEMS EBC-C384 WATCHDOG DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-watchdog@vger.kernel.org
+S: Maintained
+F: drivers/watchdog/ebc-c384_wdt.c
+
+WINSYSTEMS WS16C48 GPIO DRIVER
+M: William Breathitt Gray <vilhelm.gray@gmail.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: drivers/gpio/gpio-ws16c48.c
+
+WIREGUARD SECURE NETWORK TUNNEL
+M: Jason A. Donenfeld <Jason@zx2c4.com>
+L: wireguard@lists.zx2c4.com
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/wireguard/
+F: tools/testing/selftests/wireguard/
+
+WISTRON LAPTOP BUTTON DRIVER
+M: Miloslav Trmac <mitr@volny.cz>
+S: Maintained
+F: drivers/input/misc/wistron_btns.c
+
+WL3501 WIRELESS PCMCIA CARD DRIVER
+L: linux-wireless@vger.kernel.org
+S: Odd fixes
+F: drivers/net/wireless/wl3501*
+
+WOLFSON MICROELECTRONICS DRIVERS
+L: patches@opensource.cirrus.com
+S: Supported
+W: https://github.com/CirrusLogic/linux-drivers/wiki
+T: git https://github.com/CirrusLogic/linux-drivers.git
+F: Documentation/devicetree/bindings/extcon/wlf,arizona.yaml
+F: Documentation/devicetree/bindings/mfd/wlf,arizona.yaml
+F: Documentation/devicetree/bindings/mfd/wm831x.txt
+F: Documentation/devicetree/bindings/regulator/wlf,arizona.yaml
+F: Documentation/devicetree/bindings/sound/wlf,*.yaml
+F: Documentation/devicetree/bindings/sound/wm*
+F: Documentation/hwmon/wm83??.rst
+F: arch/arm/mach-s3c/mach-crag6410*
+F: drivers/clk/clk-wm83*.c
+F: drivers/gpio/gpio-*wm*.c
+F: drivers/gpio/gpio-arizona.c
+F: drivers/hwmon/wm83??-hwmon.c
+F: drivers/input/misc/wm831x-on.c
+F: drivers/input/touchscreen/wm831x-ts.c
+F: drivers/input/touchscreen/wm97*.c
+F: drivers/leds/leds-wm83*.c
+F: drivers/mfd/arizona*
+F: drivers/mfd/cs47l24*
+F: drivers/mfd/wm*.c
+F: drivers/power/supply/wm83*.c
+F: drivers/regulator/arizona*
+F: drivers/regulator/wm8*.c
+F: drivers/rtc/rtc-wm83*.c
+F: drivers/video/backlight/wm83*_bl.c
+F: drivers/watchdog/wm83*_wdt.c
+F: include/linux/mfd/arizona/
+F: include/linux/mfd/wm831x/
+F: include/linux/mfd/wm8350/
+F: include/linux/mfd/wm8400*
+F: include/linux/regulator/arizona*
+F: include/linux/wm97xx.h
+F: include/sound/wm????.h
+F: sound/soc/codecs/arizona*
+F: sound/soc/codecs/cs47l24*
+F: sound/soc/codecs/wm*
+
+WORKQUEUE
+M: Tejun Heo <tj@kernel.org>
+R: Lai Jiangshan <jiangshanlai@gmail.com>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git
+F: Documentation/core-api/workqueue.rst
+F: include/linux/workqueue.h
+F: kernel/workqueue.c
+
+WWAN DRIVERS
+M: Loic Poulain <loic.poulain@linaro.org>
+M: Sergey Ryazanov <ryazanov.s.a@gmail.com>
+R: Johannes Berg <johannes@sipsolutions.net>
+L: netdev@vger.kernel.org
+S: Maintained
+F: drivers/net/wwan/
+F: include/linux/wwan.h
+F: include/uapi/linux/wwan.h
+
+X-POWERS AXP288 PMIC DRIVERS
+M: Hans de Goede <hdegoede@redhat.com>
+S: Maintained
+F: drivers/acpi/pmic/intel_pmic_xpower.c
+N: axp288
+
+X-POWERS MULTIFUNCTION PMIC DEVICE DRIVERS
+M: Chen-Yu Tsai <wens@csie.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+N: axp[128]
+
+X.25 STACK
+M: Martin Schiller <ms@dev.tdt.de>
+L: linux-x25@vger.kernel.org
+S: Maintained
+F: Documentation/networking/lapb-module.rst
+F: Documentation/networking/x25*
+F: drivers/net/wan/hdlc_x25.c
+F: drivers/net/wan/lapbether.c
+F: include/*/lapb.h
+F: include/net/x25*
+F: include/uapi/linux/x25.h
+F: net/lapb/
+F: net/x25/
+
+X86 ARCHITECTURE (32-BIT AND 64-BIT)
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Ingo Molnar <mingo@redhat.com>
+M: Borislav Petkov <bp@alien8.de>
+M: Dave Hansen <dave.hansen@linux.intel.com>
+M: x86@kernel.org
+R: "H. Peter Anvin" <hpa@zytor.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/core
+F: Documentation/devicetree/bindings/x86/
+F: Documentation/x86/
+F: arch/x86/
+
+X86 ENTRY CODE
+M: Andy Lutomirski <luto@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/asm
+F: arch/x86/entry/
+
+X86 MCE INFRASTRUCTURE
+M: Tony Luck <tony.luck@intel.com>
+M: Borislav Petkov <bp@alien8.de>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: arch/x86/kernel/cpu/mce/*
+
+X86 MICROCODE UPDATE SUPPORT
+M: Borislav Petkov <bp@alien8.de>
+S: Maintained
+F: arch/x86/kernel/cpu/microcode/*
+
+X86 MM
+M: Dave Hansen <dave.hansen@linux.intel.com>
+M: Andy Lutomirski <luto@kernel.org>
+M: Peter Zijlstra <peterz@infradead.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/mm
+F: arch/x86/mm/
+
+X86 PLATFORM DRIVERS
+M: Hans de Goede <hdegoede@redhat.com>
+M: Mark Gross <mgross@linux.intel.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
+F: drivers/platform/olpc/
+F: drivers/platform/x86/
+
+X86 PLATFORM DRIVERS - ARCH
+R: Darren Hart <dvhart@infradead.org>
+R: Andy Shevchenko <andy@infradead.org>
+L: platform-driver-x86@vger.kernel.org
+L: x86@kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/core
+F: arch/x86/platform
+
+X86 PLATFORM UV HPE SUPERDOME FLEX
+M: Steve Wahl <steve.wahl@hpe.com>
+R: Mike Travis <mike.travis@hpe.com>
+R: Dimitri Sivanich <dimitri.sivanich@hpe.com>
+R: Russ Anderson <russ.anderson@hpe.com>
+S: Supported
+F: arch/x86/include/asm/uv/
+F: arch/x86/kernel/apic/x2apic_uv_x.c
+F: arch/x86/platform/uv/
+
+X86 VDSO
+M: Andy Lutomirski <luto@kernel.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/vdso
+F: arch/x86/entry/vdso/
+
+XARRAY
+M: Matthew Wilcox <willy@infradead.org>
+L: linux-fsdevel@vger.kernel.org
+S: Supported
+F: Documentation/core-api/xarray.rst
+F: include/linux/idr.h
+F: include/linux/xarray.h
+F: lib/idr.c
+F: lib/xarray.c
+F: tools/testing/radix-tree
+
+XBOX DVD IR REMOTE
+M: Benjamin Valentin <benpicco@googlemail.com>
+S: Maintained
+F: drivers/media/rc/keymaps/rc-xbox-dvd.c
+F: drivers/media/rc/xbox_remote.c
+
+XC2028/3028 TUNER DRIVER
+M: Mauro Carvalho Chehab <mchehab@kernel.org>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/tuners/tuner-xc2028.*
+
+XDP (eXpress Data Path)
+M: Alexei Starovoitov <ast@kernel.org>
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: David S. Miller <davem@davemloft.net>
+M: Jakub Kicinski <kuba@kernel.org>
+M: Jesper Dangaard Brouer <hawk@kernel.org>
+M: John Fastabend <john.fastabend@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Supported
+F: include/net/xdp.h
+F: include/net/xdp_priv.h
+F: include/trace/events/xdp.h
+F: kernel/bpf/cpumap.c
+F: kernel/bpf/devmap.c
+F: net/core/xdp.c
+F: samples/bpf/xdp*
+F: tools/testing/selftests/bpf/*xdp*
+F: tools/testing/selftests/bpf/*/*xdp*
+F: drivers/net/ethernet/*/*/*/*/*xdp*
+F: drivers/net/ethernet/*/*/*xdp*
+K: (?:\b|_)xdp(?:\b|_)
+
+XDP SOCKETS (AF_XDP)
+M: Björn Töpel <bjorn@kernel.org>
+M: Magnus Karlsson <magnus.karlsson@intel.com>
+R: Jonathan Lemon <jonathan.lemon@gmail.com>
+L: netdev@vger.kernel.org
+L: bpf@vger.kernel.org
+S: Maintained
+F: Documentation/networking/af_xdp.rst
+F: include/net/xdp_sock*
+F: include/net/xsk_buff_pool.h
+F: include/uapi/linux/if_xdp.h
+F: include/uapi/linux/xdp_diag.h
+F: include/net/netns/xdp.h
+F: net/xdp/
+F: samples/bpf/xdpsock*
+F: tools/lib/bpf/xsk*
+
+XEN BLOCK SUBSYSTEM
+M: Roger Pau Monné <roger.pau@citrix.com>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Supported
+F: drivers/block/xen*
+F: drivers/block/xen-blkback/*
+
+XEN HYPERVISOR ARM
+M: Stefano Stabellini <sstabellini@kernel.org>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/include/asm/xen/
+F: arch/arm/xen/
+
+XEN HYPERVISOR ARM64
+M: Stefano Stabellini <sstabellini@kernel.org>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm64/include/asm/xen/
+F: arch/arm64/xen/
+
+XEN HYPERVISOR INTERFACE
+M: Boris Ostrovsky <boris.ostrovsky@oracle.com>
+M: Juergen Gross <jgross@suse.com>
+R: Stefano Stabellini <sstabellini@kernel.org>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
+F: Documentation/ABI/stable/sysfs-hypervisor-xen
+F: Documentation/ABI/testing/sysfs-hypervisor-xen
+F: arch/x86/include/asm/pvclock-abi.h
+F: arch/x86/include/asm/xen/
+F: arch/x86/platform/pvh/
+F: arch/x86/xen/
+F: drivers/*/xen-*front.c
+F: drivers/xen/
+F: include/uapi/xen/
+F: include/xen/
+
+XEN NETWORK BACKEND DRIVER
+M: Wei Liu <wei.liu@kernel.org>
+M: Paul Durrant <paul@xen.org>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+L: netdev@vger.kernel.org
+S: Supported
+F: drivers/net/xen-netback/*
+
+XEN PCI SUBSYSTEM
+M: Juergen Gross <jgross@suse.com>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+S: Supported
+F: arch/x86/pci/*xen*
+F: drivers/pci/*xen*
+
+XEN PVSCSI DRIVERS
+M: Juergen Gross <jgross@suse.com>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/xen-scsifront.c
+F: drivers/xen/xen-scsiback.c
+F: include/xen/interface/io/vscsiif.h
+
+XEN SOUND FRONTEND DRIVER
+M: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+L: alsa-devel@alsa-project.org (moderated for non-subscribers)
+S: Supported
+F: sound/xen/*
+
+XEN SWIOTLB SUBSYSTEM
+M: Juergen Gross <jgross@suse.com>
+M: Stefano Stabellini <sstabellini@kernel.org>
+L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
+L: iommu@lists.linux-foundation.org
+S: Supported
+F: arch/x86/xen/*swiotlb*
+F: drivers/xen/*swiotlb*
+
+XFS FILESYSTEM
+C: irc://irc.oftc.net/xfs
+M: Darrick J. Wong <djwong@kernel.org>
+M: linux-xfs@vger.kernel.org
+L: linux-xfs@vger.kernel.org
+S: Supported
+W: http://xfs.org/
+T: git git://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git
+F: Documentation/ABI/testing/sysfs-fs-xfs
+F: Documentation/admin-guide/xfs.rst
+F: Documentation/filesystems/xfs-delayed-logging-design.rst
+F: Documentation/filesystems/xfs-self-describing-metadata.rst
+F: fs/xfs/
+F: include/uapi/linux/dqblk_xfs.h
+F: include/uapi/linux/fsmap.h
+
+XILINX AXI ETHERNET DRIVER
+M: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
+S: Maintained
+F: drivers/net/ethernet/xilinx/xilinx_axienet*
+
+XILINX CAN DRIVER
+M: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
+R: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
+L: linux-can@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/net/can/xilinx_can.txt
+F: drivers/net/can/xilinx_can.c
+
+XILINX GPIO DRIVER
+M: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
+R: Srinivas Neeli <srinivas.neeli@xilinx.com>
+R: Michal Simek <michal.simek@xilinx.com>
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/gpio-xilinx.txt
+F: Documentation/devicetree/bindings/gpio/gpio-zynq.yaml
+F: drivers/gpio/gpio-xilinx.c
+F: drivers/gpio/gpio-zynq.c
+
+XILINX SD-FEC IP CORES
+M: Derek Kiernan <derek.kiernan@xilinx.com>
+M: Dragan Cvetic <dragan.cvetic@xilinx.com>
+S: Maintained
+F: Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt
+F: Documentation/misc-devices/xilinx_sdfec.rst
+F: drivers/misc/Kconfig
+F: drivers/misc/Makefile
+F: drivers/misc/xilinx_sdfec.c
+F: include/uapi/misc/xilinx_sdfec.h
+
+XILINX UARTLITE SERIAL DRIVER
+M: Peter Korsgaard <jacmet@sunsite.dk>
+L: linux-serial@vger.kernel.org
+S: Maintained
+F: drivers/tty/serial/uartlite.c
+
+XILINX VIDEO IP CORES
+M: Hyun Kwon <hyun.kwon@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-media@vger.kernel.org
+S: Supported
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/xilinx/
+F: drivers/media/platform/xilinx/
+F: include/uapi/linux/xilinx-v4l2-controls.h
+
+XILINX ZYNQMP DPDMA DRIVER
+M: Hyun Kwon <hyun.kwon@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: dmaengine@vger.kernel.org
+S: Supported
+F: Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
+F: drivers/dma/xilinx/xilinx_dpdma.c
+F: include/dt-bindings/dma/xlnx-zynqmp-dpdma.h
+
+XILINX ZYNQMP PSGTR PHY DRIVER
+M: Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+T: git https://github.com/Xilinx/linux-xlnx.git
+F: Documentation/devicetree/bindings/phy/xlnx,zynqmp-psgtr.yaml
+F: drivers/phy/xilinx/phy-zynqmp.c
+
+XILLYBUS DRIVER
+M: Eli Billauer <eli.billauer@gmail.com>
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: drivers/char/xillybus/
+
+XLP9XX I2C DRIVER
+M: George Cherian <gcherian@marvell.com>
+L: linux-i2c@vger.kernel.org
+S: Supported
+W: http://www.marvell.com
+F: Documentation/devicetree/bindings/i2c/i2c-xlp9xx.txt
+F: drivers/i2c/busses/i2c-xlp9xx.c
+
+XRA1403 GPIO EXPANDER
+M: Nandor Han <nandor.han@ge.com>
+M: Semi Malinen <semi.malinen@ge.com>
+L: linux-gpio@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/gpio/gpio-xra1403.txt
+F: drivers/gpio/gpio-xra1403.c
+
+XTENSA XTFPGA PLATFORM SUPPORT
+M: Max Filippov <jcmvbkbc@gmail.com>
+L: linux-xtensa@linux-xtensa.org
+S: Maintained
+F: drivers/spi/spi-xtensa-xtfpga.c
+F: sound/soc/xtensa/xtfpga-i2s.c
+
+YAM DRIVER FOR AX.25
+M: Jean-Paul Roubelat <jpr@f6fbb.org>
+L: linux-hams@vger.kernel.org
+S: Maintained
+F: drivers/net/hamradio/yam*
+F: include/linux/yam.h
+
+YAMA SECURITY MODULE
+M: Kees Cook <keescook@chromium.org>
+S: Supported
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git yama/tip
+F: Documentation/admin-guide/LSM/Yama.rst
+F: security/yama/
+
+YEALINK PHONE DRIVER
+M: Henk Vergonet <Henk.Vergonet@gmail.com>
+L: usbb2k-api-dev@nongnu.org
+S: Maintained
+F: Documentation/input/devices/yealink.rst
+F: drivers/input/misc/yealink.*
+
+Z8530 DRIVER FOR AX.25
+M: Joerg Reuter <jreuter@yaina.de>
+L: linux-hams@vger.kernel.org
+S: Maintained
+W: http://yaina.de/jreuter/
+W: http://www.qsl.net/dl1bke/
+F: Documentation/networking/device_drivers/hamradio/z8530drv.rst
+F: drivers/net/hamradio/*scc.c
+F: drivers/net/hamradio/z8530.h
+
+ZBUD COMPRESSED PAGE ALLOCATOR
+M: Seth Jennings <sjenning@redhat.com>
+M: Dan Streetman <ddstreet@ieee.org>
+L: linux-mm@kvack.org
+S: Maintained
+F: mm/zbud.c
+
+ZD1211RW WIRELESS DRIVER
+M: Ulrich Kunitz <kune@deine-taler.de>
+L: linux-wireless@vger.kernel.org
+L: zd1211-devs@lists.sourceforge.net (subscribers-only)
+S: Maintained
+W: http://zd1211.ath.cx/wiki/DriverRewrite
+F: drivers/net/wireless/zydas/zd1211rw/
+
+ZD1301 MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org/
+W: http://palosaari.fi/linux/
+Q: https://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/usb/dvb-usb-v2/zd1301*
+
+ZD1301_DEMOD MEDIA DRIVER
+M: Antti Palosaari <crope@iki.fi>
+L: linux-media@vger.kernel.org
+S: Maintained
+W: https://linuxtv.org/
+W: http://palosaari.fi/linux/
+Q: https://patchwork.linuxtv.org/project/linux-media/list/
+F: drivers/media/dvb-frontends/zd1301_demod*
+
+ZHAOXIN PROCESSOR SUPPORT
+M: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: arch/x86/kernel/cpu/zhaoxin.c
+
+ZONEFS FILESYSTEM
+M: Damien Le Moal <damien.lemoal@wdc.com>
+M: Naohiro Aota <naohiro.aota@wdc.com>
+R: Johannes Thumshirn <jth@kernel.org>
+L: linux-fsdevel@vger.kernel.org
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs.git
+F: Documentation/filesystems/zonefs.rst
+F: fs/zonefs/
+
+ZPOOL COMPRESSED PAGE STORAGE API
+M: Dan Streetman <ddstreet@ieee.org>
+L: linux-mm@kvack.org
+S: Maintained
+F: include/linux/zpool.h
+F: mm/zpool.c
+
+ZR36067 VIDEO FOR LINUX DRIVER
+M: Corentin Labbe <clabbe@baylibre.com>
+L: mjpeg-users@lists.sourceforge.net
+L: linux-media@vger.kernel.org
+S: Maintained
+W: http://mjpeg.sourceforge.net/driver-zoran/
+Q: https://patchwork.linuxtv.org/project/linux-media/list/
+F: Documentation/driver-api/media/drivers/zoran.rst
+F: drivers/staging/media/zoran/
+
+ZRAM COMPRESSED RAM BLOCK DEVICE DRVIER
+M: Minchan Kim <minchan@kernel.org>
+M: Nitin Gupta <ngupta@vflare.org>
+R: Sergey Senozhatsky <senozhatsky@chromium.org>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: Documentation/admin-guide/blockdev/zram.rst
+F: drivers/block/zram/
+
+ZS DECSTATION Z85C30 SERIAL DRIVER
+M: "Maciej W. Rozycki" <macro@orcam.me.uk>
+S: Maintained
+F: drivers/tty/serial/zs.*
+
+ZSMALLOC COMPRESSED SLAB MEMORY ALLOCATOR
+M: Minchan Kim <minchan@kernel.org>
+M: Nitin Gupta <ngupta@vflare.org>
+R: Sergey Senozhatsky <senozhatsky@chromium.org>
+L: linux-mm@kvack.org
+S: Maintained
+F: Documentation/vm/zsmalloc.rst
+F: include/linux/zsmalloc.h
+F: mm/zsmalloc.c
+
+ZSWAP COMPRESSED SWAP CACHING
+M: Seth Jennings <sjenning@redhat.com>
+M: Dan Streetman <ddstreet@ieee.org>
+M: Vitaly Wool <vitaly.wool@konsulko.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: mm/zswap.c
+
+THE REST
+M: Linus Torvalds <torvalds@linux-foundation.org>
+L: linux-kernel@vger.kernel.org
+S: Buried alive in reporters
+Q: http://patchwork.kernel.org/project/LKML/list/
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
+F: *
+F: */
diff -urN linux-5.15/crypto/drbg.c linux-5.15-lrng/crypto/drbg.c
--- linux-5.15/crypto/drbg.c 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/crypto/drbg.c 2021-11-29 12:37:31.183279025 +1100
@@ -114,7 +114,7 @@
* the SHA256 / AES 256 over other ciphers. Thus, the favored
* DRBGs are the latest entries in this array.
*/
-static const struct drbg_core drbg_cores[] = {
+const struct drbg_core drbg_cores[] = {
#ifdef CONFIG_CRYPTO_DRBG_CTR
{
.flags = DRBG_CTR | DRBG_STRENGTH128,
@@ -191,6 +191,7 @@
},
#endif /* CONFIG_CRYPTO_DRBG_HMAC */
};
+EXPORT_SYMBOL(drbg_cores);
static int drbg_uninstantiate(struct drbg_state *drbg);
@@ -206,7 +207,7 @@
* Return: normalized strength in *bytes* value or 32 as default
* to counter programming errors
*/
-static inline unsigned short drbg_sec_strength(drbg_flag_t flags)
+unsigned short drbg_sec_strength(drbg_flag_t flags)
{
switch (flags & DRBG_STRENGTH_MASK) {
case DRBG_STRENGTH128:
@@ -219,6 +220,7 @@
return 32;
}
}
+EXPORT_SYMBOL(drbg_sec_strength);
/*
* FIPS 140-2 continuous self test for the noise source
@@ -1215,7 +1217,7 @@
}
/* Free all substructures in a DRBG state without the DRBG state structure */
-static inline void drbg_dealloc_state(struct drbg_state *drbg)
+void drbg_dealloc_state(struct drbg_state *drbg)
{
if (!drbg)
return;
@@ -1236,12 +1238,13 @@
drbg->fips_primed = false;
}
}
+EXPORT_SYMBOL(drbg_dealloc_state);
/*
* Allocate all sub-structures for a DRBG state.
* The DRBG state structure must already be allocated.
*/
-static inline int drbg_alloc_state(struct drbg_state *drbg)
+int drbg_alloc_state(struct drbg_state *drbg)
{
int ret = -ENOMEM;
unsigned int sb_size = 0;
@@ -1322,6 +1325,7 @@
drbg_dealloc_state(drbg);
return ret;
}
+EXPORT_SYMBOL(drbg_alloc_state);
/*************************************************************************
* DRBG interface functions
@@ -1891,8 +1895,7 @@
*
* return: flags
*/
-static inline void drbg_convert_tfm_core(const char *cra_driver_name,
- int *coreref, bool *pr)
+void drbg_convert_tfm_core(const char *cra_driver_name, int *coreref, bool *pr)
{
int i = 0;
size_t start = 0;
@@ -1919,6 +1922,7 @@
}
}
}
+EXPORT_SYMBOL(drbg_convert_tfm_core);
static int drbg_kcapi_init(struct crypto_tfm *tfm)
{
diff -urN linux-5.15/crypto/jitterentropy-kcapi.c linux-5.15-lrng/crypto/jitterentropy-kcapi.c
--- linux-5.15/crypto/jitterentropy-kcapi.c 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/crypto/jitterentropy-kcapi.c 2021-11-29 12:37:52.903278942 +1100
@@ -43,8 +43,7 @@
#include <linux/fips.h>
#include <linux/time.h>
#include <crypto/internal/rng.h>
-
-#include "jitterentropy.h"
+#include <crypto/internal/jitterentropy.h>
/***************************************************************************
* Helper function
diff -urN linux-5.15/crypto/jitterentropy.c linux-5.15-lrng/crypto/jitterentropy.c
--- linux-5.15/crypto/jitterentropy.c 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/crypto/jitterentropy.c 2021-11-29 12:37:52.903278942 +1100
@@ -117,7 +117,7 @@
#define JENT_EHEALTH 9 /* Health test failed during initialization */
#define JENT_ERCT 10 /* RCT failed during initialization */
-#include "jitterentropy.h"
+#include <crypto/internal/jitterentropy.h>
/***************************************************************************
* Adaptive Proportion Test
diff -urN linux-5.15/crypto/jitterentropy.h linux-5.15-lrng/crypto/jitterentropy.h
--- linux-5.15/crypto/jitterentropy.h 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/crypto/jitterentropy.h 1970-01-01 10:00:00.000000000 +1000
@@ -1,17 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-extern void *jent_zalloc(unsigned int len);
-extern void jent_zfree(void *ptr);
-extern int jent_fips_enabled(void);
-extern void jent_panic(char *s);
-extern void jent_memcpy(void *dest, const void *src, unsigned int n);
-extern void jent_get_nstime(__u64 *out);
-
-struct rand_data;
-extern int jent_entropy_init(void);
-extern int jent_read_entropy(struct rand_data *ec, unsigned char *data,
- unsigned int len);
-
-extern struct rand_data *jent_entropy_collector_alloc(unsigned int osr,
- unsigned int flags);
-extern void jent_entropy_collector_free(struct rand_data *entropy_collector);
diff -urN linux-5.15/drivers/char/Kconfig linux-5.15-lrng/drivers/char/Kconfig
--- linux-5.15/drivers/char/Kconfig 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/drivers/char/Kconfig 2021-11-29 12:36:52.113279174 +1100
@@ -451,4 +451,6 @@
pool. Otherwise, say N here so it will be regarded as device input that
only mixes the entropy pool.
+source "drivers/char/lrng/Kconfig"
+
endmenu
diff -urN linux-5.15/drivers/char/Makefile linux-5.15-lrng/drivers/char/Makefile
--- linux-5.15/drivers/char/Makefile 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/drivers/char/Makefile 2021-11-29 12:36:52.113279174 +1100
@@ -3,7 +3,14 @@
# Makefile for the kernel character device drivers.
#
-obj-y += mem.o random.o
+obj-y += mem.o
+
+ifeq ($(CONFIG_LRNG),y)
+ obj-y += lrng/
+else
+ obj-y += random.o
+endif
+
obj-$(CONFIG_TTY_PRINTK) += ttyprintk.o
obj-y += misc.o
obj-$(CONFIG_ATARI_DSP56K) += dsp56k.o
diff -urN linux-5.15/drivers/char/lrng/Kconfig linux-5.15-lrng/drivers/char/lrng/Kconfig
--- linux-5.15/drivers/char/lrng/Kconfig 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/Kconfig 2021-11-29 12:38:26.593278813 +1100
@@ -0,0 +1,589 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Linux Random Number Generator configuration
+#
+
+menuconfig LRNG
+ bool "Linux Random Number Generator"
+ select CRYPTO_LIB_SHA256 if CRYPTO
+ help
+ The Linux Random Number Generator (LRNG) is the replacement
+ of the existing /dev/random provided with drivers/char/random.c.
+ It generates entropy from different noise sources and
+ delivers significant entropy during boot.
+
+if LRNG
+
+menu "Specific DRNG seeding strategies"
+
+config LRNG_OVERSAMPLE_ENTROPY_SOURCES
+ bool "Oversample entropy sources"
+ default n
+ help
+ When enabling this option, the entropy sources are
+ over-sampled with the following approach: First, the
+ the entropy sources are requested to provide 64 bits more
+ entropy than the size of the entropy buffer. For example,
+ if the entropy buffer is 256 bits, 320 bits of entropy
+ is requested to fill that buffer.
+
+ Second, the seed operation of the deterministic RNG
+ requests 128 bits more data from each entropy source than
+ the security strength of the DRNG during initialization.
+ A prerequisite for this operation is that the digest size
+ of the used hash must be at least equally large to generate
+ that buffer. If the prerequisite is not met, this
+ oversampling is not applied.
+
+ This strategy is intended to offset the asymptotic entropy
+ increase to reach full entropy in a buffer.
+
+ The strategy is consistent with the requirements in
+ NIST SP800-90C and is only enforced with fips=1.
+
+ If unsure, say N.
+
+config LRNG_OVERSAMPLE_ES_BITS
+ int
+ default 0 if !LRNG_OVERSAMPLE_ENTROPY_SOURCES
+ default 64 if LRNG_OVERSAMPLE_ENTROPY_SOURCES
+
+config LRNG_SEED_BUFFER_INIT_ADD_BITS
+ int
+ default 0 if !LRNG_OVERSAMPLE_ENTROPY_SOURCES
+ default 128 if LRNG_OVERSAMPLE_ENTROPY_SOURCES
+
+endmenu # "Specific DRNG seeding strategies"
+
+menu "Entropy Source Configuration"
+
+comment "Interrupt Entropy Source"
+
+config LRNG_IRQ
+ bool "Enable Interrupt Entropy Source as LRNG Seed Source"
+ default y
+ help
+ The LRNG models an entropy source based on the timing of the
+ occurrence of interrupts. Enable this option to enable this
+ IRQ entropy source.
+
+ The IRQ entropy source is triggered every time an interrupt
+ arrives and thus causes the interrupt handler to execute
+ slightly longer. Disabling the IRQ entropy source implies
+ that the performance penalty on the interrupt handler added
+ by the LRNG is eliminated. Yet, this entropy source is
+ considered to be the internal entropy source of the LRNG.
+ Thus, only disable it if you ensured that other entropy
+ sources are available that supply the LRNG with entropy.
+
+ If you disable the IRQ entropy source, you MUST ensure
+ one or more entropy sources collectively have the
+ capability to deliver sufficient entropy with one invocation
+ at a rate compliant to the security strength of the DRNG
+ (usually 256 bits of entropy). In addition, if those
+ entropy sources do not deliver sufficient entropy during
+ first request, the reseed must be triggered from user
+ space or kernel space when sufficient entropy is considered
+ to be present.
+
+ If unsure, say Y.
+
+choice
+ prompt "Continuous entropy compression boot time setting"
+ default LRNG_CONTINUOUS_COMPRESSION_ENABLED
+ depends on LRNG_IRQ
+ help
+ Select the default behavior of the interrupt entropy source
+ continuous compression operation.
+
+ The Linux RNG collects entropy data during each interrupt.
+ For performance reasons, a amount of entropy data defined by
+ the LRNG entropy collection pool size is concatenated into
+ an array. When that array is filled up, a hash is calculated
+ to compress the entropy. That hash is calculated in
+ interrupt context.
+
+ In case such hash calculation in interrupt context is deemed
+ too time-consuming, the continuous compression operation
+ can be disabled. If disabled, the collection of entropy will
+ not trigger a hash compression operation in interrupt context.
+ The compression happens only when the DRNG is reseeded which is
+ in process context. This implies that old entropy data
+ collected after the last DRNG-reseed is overwritten with newer
+ entropy data once the collection pool is full instead of
+ retaining its entropy with the compression operation.
+
+ config LRNG_CONTINUOUS_COMPRESSION_ENABLED
+ bool "Enable continuous compression (default)"
+
+ config LRNG_CONTINUOUS_COMPRESSION_DISABLED
+ bool "Disable continuous compression"
+endchoice
+
+config LRNG_ENABLE_CONTINUOUS_COMPRESSION
+ bool
+ default y if LRNG_CONTINUOUS_COMPRESSION_ENABLED
+ default n if LRNG_CONTINUOUS_COMPRESSION_DISABLED
+
+config LRNG_SWITCHABLE_CONTINUOUS_COMPRESSION
+ bool "Runtime-switchable continuous entropy compression"
+ depends on LRNG_IRQ
+ help
+ Per default, the interrupt entropy source continuous
+ compression operation behavior is hard-wired into the kernel.
+ Enable this option to allow it to be configurable at boot time.
+
+ To modify the default behavior of the continuous
+ compression operation, use the kernel command line option
+ of lrng_sw_noise.lrng_pcpu_continuous_compression.
+
+ If unsure, say N.
+
+choice
+ prompt "LRNG Entropy Collection Pool Size"
+ default LRNG_COLLECTION_SIZE_1024
+ depends on LRNG_IRQ
+ help
+ Select the size of the LRNG entropy collection pool
+ storing data for the interrupt entropy source without
+ performing a compression operation. The larger the
+ collection size is, the faster the average interrupt
+ handling will be. The collection size represents the
+ number of bytes of the per-CPU memory used to batch
+ up entropy event data.
+
+ The default value is good for regular operations. Choose
+ larger sizes for servers that have no memory limitations.
+ If runtime memory is precious, choose a smaller size.
+
+ The collection size is unrelated to the entropy rate
+ or the amount of entropy the LRNG can process.
+
+ config LRNG_COLLECTION_SIZE_32
+ depends on LRNG_CONTINUOUS_COMPRESSION_ENABLED
+ depends on !LRNG_SWITCHABLE_CONTINUOUS_COMPRESSION
+ depends on !LRNG_OVERSAMPLE_ENTROPY_SOURCES
+ bool "32 interrupt events"
+
+ config LRNG_COLLECTION_SIZE_256
+ depends on !LRNG_OVERSAMPLE_ENTROPY_SOURCES
+ bool "256 interrupt events"
+
+ config LRNG_COLLECTION_SIZE_512
+ bool "512 interrupt events"
+
+ config LRNG_COLLECTION_SIZE_1024
+ bool "1024 interrupt events (default)"
+
+ config LRNG_COLLECTION_SIZE_2048
+ bool "2048 interrupt events"
+
+ config LRNG_COLLECTION_SIZE_4096
+ bool "4096 interrupt events"
+
+ config LRNG_COLLECTION_SIZE_8192
+ bool "8192 interrupt events"
+
+endchoice
+
+config LRNG_COLLECTION_SIZE
+ int
+ default 32 if LRNG_COLLECTION_SIZE_32
+ default 256 if LRNG_COLLECTION_SIZE_256
+ default 512 if LRNG_COLLECTION_SIZE_512
+ default 1024 if LRNG_COLLECTION_SIZE_1024
+ default 2048 if LRNG_COLLECTION_SIZE_2048
+ default 4096 if LRNG_COLLECTION_SIZE_4096
+ default 8192 if LRNG_COLLECTION_SIZE_8192
+
+config LRNG_HEALTH_TESTS
+ bool "Enable interrupt entropy source online health tests"
+ depends on LRNG_IRQ
+ help
+ The online health tests applied to the interrupt entropy
+ source validate the noise source at runtime for fatal
+ errors. These tests include SP800-90B compliant tests
+ which are invoked if the system is booted with fips=1.
+ In case of fatal errors during active SP800-90B tests,
+ the issue is logged and the noise data is discarded.
+ These tests are required for full compliance of the
+ interrupt entropy source with SP800-90B.
+
+ If unsure, say Y.
+
+config LRNG_RCT_BROKEN
+ bool "SP800-90B RCT with dangerous low cutoff value"
+ depends on LRNG_HEALTH_TESTS
+ depends on BROKEN
+ default n
+ help
+ This option enables a dangerously low SP800-90B repetitive
+ count test (RCT) cutoff value which makes it very likely
+ that the RCT is triggered to raise a self test failure.
+
+ This option is ONLY intended for developers wanting to
+ test the effectiveness of the SP800-90B RCT health test.
+
+ If unsure, say N.
+
+config LRNG_APT_BROKEN
+ bool "SP800-90B APT with dangerous low cutoff value"
+ depends on LRNG_HEALTH_TESTS
+ depends on BROKEN
+ default n
+ help
+ This option enables a dangerously low SP800-90B adaptive
+ proportion test (APT) cutoff value which makes it very
+ likely that the APT is triggered to raise a self test
+ failure.
+
+ This option is ONLY intended for developers wanting to
+ test the effectiveness of the SP800-90B APT health test.
+
+ If unsure, say N.
+
+# Default taken from SP800-90B sec 4.4.1 - significance level 2^-30
+config LRNG_RCT_CUTOFF
+ int
+ default 31 if !LRNG_RCT_BROKEN
+ default 1 if LRNG_RCT_BROKEN
+
+# Default taken from SP800-90B sec 4.4.2 - significance level 2^-30
+config LRNG_APT_CUTOFF
+ int
+ default 325 if !LRNG_APT_BROKEN
+ default 32 if LRNG_APT_BROKEN
+
+config LRNG_IRQ_ENTROPY_RATE
+ int "Interrupt Entropy Source Entropy Rate"
+ depends on LRNG_IRQ
+ range 256 4294967295
+ default 256
+ help
+ The LRNG will collect the configured number of interrupts to
+ obtain 256 bits of entropy. This value can be set to any between
+ 256 and 4294967295. The LRNG guarantees that this value is not
+ lower than 256. This lower limit implies that one interrupt event
+ is credited with one bit of entropy. This value is subject to the
+ increase by the oversampling factor, if no high-resolution timer
+ is found.
+
+ In order to effectively disable the interrupt entropy source,
+ the option has to be set to 4294967295. In this case, the
+ interrupt entropy source will still deliver data but without
+ being credited with entropy.
+
+comment "Jitter RNG Entropy Source"
+
+config LRNG_JENT
+ bool "Enable Jitter RNG as LRNG Seed Source"
+ depends on CRYPTO
+ select CRYPTO_JITTERENTROPY
+ help
+ The Linux RNG may use the Jitter RNG as noise source. Enabling
+ this option enables the use of the Jitter RNG. Its default
+ entropy level is 16 bits of entropy per 256 data bits delivered
+ by the Jitter RNG. This entropy level can be changed at boot
+ time or at runtime with the lrng_base.jitterrng configuration
+ variable.
+
+config LRNG_JENT_ENTROPY_RATE
+ int "Jitter RNG Entropy Source Entropy Rate"
+ depends on LRNG_JENT
+ range 0 256
+ default 16
+ help
+ The option defines the amount of entropy the LRNG applies to 256
+ bits of data obtained from the Jitter RNG entropy source. The
+ LRNG enforces the limit that this value must be in the range
+ between 0 and 256.
+
+ When configuring this value to 0, the Jitter RNG entropy source
+ will provide 256 bits of data without being credited to contain
+ entropy.
+
+comment "CPU Entropy Source"
+
+config LRNG_CPU
+ bool "Enable CPU Entropy Source as LRNG Seed Source"
+ default y
+ help
+ Current CPUs commonly contain entropy sources which can be
+ used to seed the LRNG. For example, the Intel RDSEED
+ instruction, or the POWER DARN instruction will be sourced
+ to seed the LRNG if this option is enabled.
+
+ Note, if this option is enabled and the underlying CPU
+ does not offer such entropy source, the LRNG will automatically
+ detect this and ignore the hardware.
+
+config LRNG_CPU_FULL_ENT_MULTIPLIER
+ int
+ default 1 if !LRNG_TEST_CPU_ES_COMPRESSION
+ default 123 if LRNG_TEST_CPU_ES_COMPRESSION
+
+config LRNG_CPU_ENTROPY_RATE
+ int "CPU Entropy Source Entropy Rate"
+ depends on LRNG_CPU
+ range 0 256
+ default 8
+ help
+ The option defines the amount of entropy the LRNG applies to 256
+ bits of data obtained from the CPU entropy source. The LRNG
+ enforces the limit that this value must be in the range between
+ 0 and 256.
+
+ When configuring this value to 0, the CPU entropy source will
+ provide 256 bits of data without being credited to contain
+ entropy.
+
+ Note, this option is overwritten when the option
+ CONFIG_RANDOM_TRUST_CPU is set.
+
+endmenu # "Entropy Source Configuration"
+
+menuconfig LRNG_DRNG_SWITCH
+ bool "Support DRNG runtime switching"
+ help
+ The Linux RNG per default uses a ChaCha20 DRNG that is
+ accessible via the external interfaces. With this configuration
+ option other DRNGs can be selected and loaded at runtime.
+
+if LRNG_DRNG_SWITCH
+
+config LRNG_KCAPI_HASH
+ bool
+ select CRYPTO_HASH
+
+config LRNG_DRBG
+ tristate "SP800-90A support for the LRNG"
+ depends on CRYPTO
+ select CRYPTO_DRBG_MENU
+ select CRYPTO_SHA512
+ select LRNG_KCAPI_HASH
+ help
+ Enable the SP800-90A DRBG support for the LRNG. Once the
+ module is loaded, output from /dev/random, /dev/urandom,
+ getrandom(2), or get_random_bytes_full is provided by a DRBG.
+
+config LRNG_KCAPI
+ tristate "Kernel Crypto API support for the LRNG"
+ depends on CRYPTO
+ depends on !LRNG_DRBG
+ select CRYPTO_RNG
+ select LRNG_KCAPI_HASH
+ help
+ Enable the support for generic pseudo-random number
+ generators offered by the kernel crypto API with the
+ LRNG. Once the module is loaded, output from /dev/random,
+ /dev/urandom, getrandom(2), or get_random_bytes is
+ provided by the selected kernel crypto API RNG.
+endif # LRNG_DRNG_SWITCH
+
+menuconfig LRNG_TESTING_MENU
+ bool "LRNG testing interfaces"
+ depends on DEBUG_FS
+ help
+ Enable one or more of the following test interfaces.
+
+ If unsure, say N.
+
+if LRNG_TESTING_MENU
+
+config LRNG_RAW_HIRES_ENTROPY
+ bool "Enable entropy test interface to hires timer noise source"
+ default y
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned high resolution time stamp noise that
+ is collected by the LRNG for statistical analysis. Extracted
+ noise data is not used to seed the LRNG.
+
+ The raw noise data can be obtained using the lrng_raw_hires
+ debugfs file. Using the option lrng_testing.boot_raw_hires_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_JIFFIES_ENTROPY
+ bool "Enable entropy test interface to Jiffies noise source"
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned Jiffies that is collected by
+ the LRNG for statistical analysis. This data is used for
+ seeding the LRNG if a high-resolution time stamp is not
+ available. If a high-resolution time stamp is detected,
+ the Jiffies value is not collected by the LRNG and no
+ data is provided via the test interface. Extracted noise
+ data is not used to seed the random number generator.
+
+ The raw noise data can be obtained using the lrng_raw_jiffies
+ debugfs file. Using the option lrng_testing.boot_raw_jiffies_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_IRQ_ENTROPY
+ bool "Enable entropy test interface to IRQ number noise source"
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned interrupt number that is collected by
+ the LRNG for statistical analysis. This data is used for
+ seeding the random32 PRNG external to the LRNG if a
+ high-resolution time stamp is available or it will be used to
+ seed the LRNG otherwise. Extracted noise data is not used to
+ seed the random number generator.
+
+ The raw noise data can be obtained using the lrng_raw_irq
+ debugfs file. Using the option lrng_testing.boot_raw_irq_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_IRQFLAGS_ENTROPY
+ bool "Enable entropy test interface to IRQ flags noise source"
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned interrupt flags that is collected by
+ the LRNG for statistical analysis. This data is used for
+ seeding the random32 PRNG external to the LRNG if a
+ high-resolution time stamp is available or it will be used to
+ seed the LRNG otherwise. Extracted noise data is not used to
+ seed the random number generator.
+
+ The raw noise data can be obtained using the lrng_raw_irqflags
+ debugfs file. Using the option lrng_testing.boot_raw_irqflags_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_RETIP_ENTROPY
+ bool "Enable entropy test interface to RETIP value noise source"
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned return instruction pointer value
+ that is collected by the LRNG for statistical analysis.
+ This data is used for seeding the random32 PRNG external
+ to the LRNG if a high-resolution time stamp is available or
+ it will be used to seed the LRNG otherwise. Extracted noise
+ data is not used to seed the random number generator.
+
+ The raw noise data can be obtained using the lrng_raw_retip
+ debugfs file. Using the option lrng_testing.boot_raw_retip_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_REGS_ENTROPY
+ bool "Enable entropy test interface to IRQ register value noise source"
+ help
+ The test interface allows a privileged process to capture
+ the raw unconditioned interrupt register value that is
+ collected by the LRNG for statistical analysis. Extracted noise
+ data is not used to seed the random number generator.
+
+ The raw noise data can be obtained using the lrng_raw_regs
+ debugfs file. Using the option lrng_testing.boot_raw_regs_test=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_RAW_ARRAY
+ bool "Enable test interface to LRNG raw entropy storage array"
+ help
+ The test interface allows a privileged process to capture
+ the raw noise data that is collected by the LRNG
+ in the per-CPU array for statistical analysis. The purpose
+ of this interface is to verify that the array handling code
+ truly only concatenates data and provides the same entropy
+ rate as the raw unconditioned noise source when assessing
+ the collected data byte-wise.
+
+ The data can be obtained using the lrng_raw_array debugfs
+ file. Using the option lrng_testing.boot_raw_array=1
+ the raw noise of the first 1000 entropy events since boot
+ can be sampled.
+
+config LRNG_IRQ_PERF
+ bool "Enable LRNG interrupt performance monitor"
+ help
+ With this option, the performance monitor of the LRNG
+ interrupt handling code is enabled. The file provides
+ the execution time of the interrupt handler in
+ cycles.
+
+ The interrupt performance data can be obtained using
+ the lrng_irq_perf debugfs file. Using the option
+ lrng_testing.boot_irq_perf=1 the performance data of
+ the first 1000 entropy events since boot can be sampled.
+
+config LRNG_ACVT_HASH
+ bool "Enable LRNG ACVT Hash interface"
+ help
+ With this option, the LRNG built-in hash function used for
+ auxiliary pool management and prior to switching the
+ cryptographic backends is made available for ACVT. The
+ interface allows writing of the data to be hashed
+ into the interface. The read operation triggers the hash
+ operation to generate message digest.
+
+ The ACVT interface is available with the lrng_acvt_hash
+ debugfs file.
+
+config LRNG_RUNTIME_ES_CONFIG
+ bool "Enable runtime configuration of entropy sources"
+ help
+ When enabling this option, the LRNG provides the mechanism
+ allowing to alter the entropy rate of each entropy source
+ during boot time and runtime.
+
+ The following interfaces are available:
+ lrng_archrandom.archrandom for the CPU entropy source,
+ lrng_jent.jitterrng for the Jitter RNG entropy source, and
+ lrng_sw_noise.irq_entropy for the interrupt entropy source.
+
+config LRNG_RUNTIME_MAX_WO_RESEED_CONFIG
+ bool "Enable runtime configuration of max reseed threshold"
+ help
+ When enabling this option, the LRNG provides an interface
+ allowing the setting of the maximum number of DRNG generate
+ operations without a reseed that has full entropy. The
+ interface is lrng_drng.max_wo_reseed.
+
+config LRNG_TEST_CPU_ES_COMPRESSION
+ bool "Force CPU ES compression operation"
+ help
+ When enabling this option, the CPU ES compression operation
+ is forced by setting an arbitrary value > 1 for the data
+ multiplier even when the CPU ES would deliver full entropy.
+ This allows testing of the compression operation. It
+ therefore forces to pull more data from the CPU ES
+ than what may be required.
+
+config LRNG_TESTING
+ bool
+ default y if (LRNG_RAW_HIRES_ENTROPY || LRNG_RAW_JIFFIES_ENTROPY ||LRNG_RAW_IRQ_ENTROPY || LRNG_RAW_IRQFLAGS_ENTROPY || LRNG_RAW_RETIP_ENTROPY || LRNG_RAW_REGS_ENTROPY || LRNG_RAW_ARRAY || LRNG_IRQ_PERF || LRNG_ACVT_HASH)
+
+endif #LRNG_TESTING_MENU
+
+config LRNG_SELFTEST
+ bool "Enable power-on and on-demand self-tests"
+ help
+ The power-on self-tests are executed during boot time
+ covering the ChaCha20 DRNG, the hash operation used for
+ processing the entropy pools and the auxiliary pool, and
+ the time stamp management of the LRNG.
+
+ The on-demand self-tests are triggered by writing any
+ value into the SysFS file selftest_status. At the same
+ time, when reading this file, the test status is
+ returned. A zero indicates that all tests were executed
+ successfully.
+
+ If unsure, say Y.
+
+if LRNG_SELFTEST
+
+config LRNG_SELFTEST_PANIC
+ bool "Panic the kernel upon self-test failure"
+ help
+ If the option is enabled, the kernel is terminated if an
+ LRNG power-on self-test failure is detected.
+
+endif # LRNG_SELFTEST
+
+endif # LRNG
diff -urN linux-5.15/drivers/char/lrng/Makefile linux-5.15-lrng/drivers/char/lrng/Makefile
--- linux-5.15/drivers/char/lrng/Makefile 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/Makefile 2021-11-29 12:38:26.593278813 +1100
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Random Number Generator.
+#
+
+obj-y += lrng_es_mgr.o lrng_aux.o \
+ lrng_drng.o lrng_chacha20.o \
+ lrng_interfaces.o lrng_es_aux.o
+
+obj-$(CONFIG_LRNG_IRQ) += lrng_es_irq.o
+obj-$(CONFIG_SYSCTL) += lrng_proc.o
+obj-$(CONFIG_NUMA) += lrng_numa.o
+obj-$(CONFIG_LRNG_CPU) += lrng_es_archrandom.o
+obj-$(CONFIG_LRNG_DRNG_SWITCH) += lrng_switch.o
+obj-$(CONFIG_LRNG_KCAPI_HASH) += lrng_kcapi_hash.o
+obj-$(CONFIG_LRNG_DRBG) += lrng_drbg.o
+obj-$(CONFIG_LRNG_KCAPI) += lrng_kcapi.o
+obj-$(CONFIG_LRNG_JENT) += lrng_es_jent.o
+obj-$(CONFIG_LRNG_HEALTH_TESTS) += lrng_health.o
+obj-$(CONFIG_LRNG_TESTING) += lrng_testing.o
+obj-$(CONFIG_LRNG_SELFTEST) += lrng_selftest.o
diff -urN linux-5.15/drivers/char/lrng/lrng_aux.c linux-5.15-lrng/drivers/char/lrng/lrng_aux.c
--- linux-5.15/drivers/char/lrng/lrng_aux.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_aux.c 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG auxiliary interfaces
+ *
+ * Copyright (C) 2019 - 2021 Stephan Mueller <smueller@chronox.de>
+ * Copyright (C) 2017 Jason A. Donenfeld <Jason@zx2c4.com>. All
+ * Rights Reserved.
+ * Copyright (C) 2016 Jason Cooper <jason@lakedaemon.net>
+ */
+
+#include <linux/mm.h>
+#include <linux/random.h>
+
+#include "lrng_internal.h"
+
+struct batched_entropy {
+ union {
+ u64 entropy_u64[LRNG_DRNG_BLOCKSIZE / sizeof(u64)];
+ u32 entropy_u32[LRNG_DRNG_BLOCKSIZE / sizeof(u32)];
+ };
+ unsigned int position;
+ spinlock_t batch_lock;
+};
+
+/*
+ * Get a random word for internal kernel use only. The quality of the random
+ * number is as good as /dev/urandom, but there is no backtrack protection,
+ * with the goal of being quite fast and not depleting entropy.
+ */
+static DEFINE_PER_CPU(struct batched_entropy, batched_entropy_u64) = {
+ .batch_lock = __SPIN_LOCK_UNLOCKED(batched_entropy_u64.lock),
+};
+
+u64 get_random_u64(void)
+{
+ u64 ret;
+ unsigned long flags;
+ struct batched_entropy *batch;
+
+ lrng_debug_report_seedlevel("get_random_u64");
+
+ batch = raw_cpu_ptr(&batched_entropy_u64);
+ spin_lock_irqsave(&batch->batch_lock, flags);
+ if (batch->position % ARRAY_SIZE(batch->entropy_u64) == 0) {
+ lrng_drng_get_atomic((u8 *)batch->entropy_u64,
+ LRNG_DRNG_BLOCKSIZE);
+ batch->position = 0;
+ }
+ ret = batch->entropy_u64[batch->position++];
+ spin_unlock_irqrestore(&batch->batch_lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(get_random_u64);
+
+static DEFINE_PER_CPU(struct batched_entropy, batched_entropy_u32) = {
+ .batch_lock = __SPIN_LOCK_UNLOCKED(batched_entropy_u32.lock),
+};
+
+u32 get_random_u32(void)
+{
+ u32 ret;
+ unsigned long flags;
+ struct batched_entropy *batch;
+
+ lrng_debug_report_seedlevel("get_random_u32");
+
+ batch = raw_cpu_ptr(&batched_entropy_u32);
+ spin_lock_irqsave(&batch->batch_lock, flags);
+ if (batch->position % ARRAY_SIZE(batch->entropy_u32) == 0) {
+ lrng_drng_get_atomic((u8 *)batch->entropy_u32,
+ LRNG_DRNG_BLOCKSIZE);
+ batch->position = 0;
+ }
+ ret = batch->entropy_u32[batch->position++];
+ spin_unlock_irqrestore(&batch->batch_lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(get_random_u32);
+
+/*
+ * It's important to invalidate all potential batched entropy that might
+ * be stored before the crng is initialized, which we can do lazily by
+ * simply resetting the counter to zero so that it's re-extracted on the
+ * next usage.
+ */
+void invalidate_batched_entropy(void)
+{
+ int cpu;
+ unsigned long flags;
+
+ for_each_possible_cpu(cpu) {
+ struct batched_entropy *batched_entropy;
+
+ batched_entropy = per_cpu_ptr(&batched_entropy_u32, cpu);
+ spin_lock_irqsave(&batched_entropy->batch_lock, flags);
+ batched_entropy->position = 0;
+ spin_unlock(&batched_entropy->batch_lock);
+
+ batched_entropy = per_cpu_ptr(&batched_entropy_u64, cpu);
+ spin_lock(&batched_entropy->batch_lock);
+ batched_entropy->position = 0;
+ spin_unlock_irqrestore(&batched_entropy->batch_lock, flags);
+ }
+}
+
+/*
+ * randomize_page - Generate a random, page aligned address
+ * @start: The smallest acceptable address the caller will take.
+ * @range: The size of the area, starting at @start, within which the
+ * random address must fall.
+ *
+ * If @start + @range would overflow, @range is capped.
+ *
+ * NOTE: Historical use of randomize_range, which this replaces, presumed that
+ * @start was already page aligned. We now align it regardless.
+ *
+ * Return: A page aligned address within [start, start + range). On error,
+ * @start is returned.
+ */
+unsigned long randomize_page(unsigned long start, unsigned long range)
+{
+ if (!PAGE_ALIGNED(start)) {
+ range -= PAGE_ALIGN(start) - start;
+ start = PAGE_ALIGN(start);
+ }
+
+ if (start > ULONG_MAX - range)
+ range = ULONG_MAX - start;
+
+ range >>= PAGE_SHIFT;
+
+ if (range == 0)
+ return start;
+
+ return start + (get_random_long() % range << PAGE_SHIFT);
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_chacha20.c linux-5.15-lrng/drivers/char/lrng/lrng_chacha20.c
--- linux-5.15/drivers/char/lrng/lrng_chacha20.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_chacha20.c 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Backend for the LRNG providing the cryptographic primitives using
+ * ChaCha20 cipher implementations.
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/chacha.h>
+#include <linux/lrng.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+
+#include "lrng_chacha20.h"
+#include "lrng_internal.h"
+
+/******************************* ChaCha20 DRNG *******************************/
+
+#define CHACHA_BLOCK_WORDS (CHACHA_BLOCK_SIZE / sizeof(u32))
+
+struct chacha20_state {
+ struct chacha20_block block;
+};
+
+/*
+ * Have a static memory blocks for the ChaCha20 DRNG instance to avoid calling
+ * kmalloc too early in the boot cycle. For subsequent allocation requests,
+ * such as per-NUMA-node DRNG instances, kmalloc will be used.
+ */
+struct chacha20_state chacha20 __latent_entropy;
+
+/*
+ * Update of the ChaCha20 state by either using an unused buffer part or by
+ * generating one ChaCha20 block which is half of the state of the ChaCha20.
+ * The block is XORed into the key part of the state. This shall ensure
+ * backtracking resistance as well as a proper mix of the ChaCha20 state once
+ * the key is injected.
+ */
+static void lrng_chacha20_update(struct chacha20_state *chacha20_state,
+ __le32 *buf, u32 used_words)
+{
+ struct chacha20_block *chacha20 = &chacha20_state->block;
+ u32 i;
+ __le32 tmp[CHACHA_BLOCK_WORDS];
+
+ BUILD_BUG_ON(sizeof(struct chacha20_block) != CHACHA_BLOCK_SIZE);
+ BUILD_BUG_ON(CHACHA_BLOCK_SIZE != 2 * CHACHA_KEY_SIZE);
+
+ if (used_words > CHACHA_KEY_SIZE_WORDS) {
+ chacha20_block(&chacha20->constants[0], (u8 *)tmp);
+ for (i = 0; i < CHACHA_KEY_SIZE_WORDS; i++)
+ chacha20->key.u[i] ^= le32_to_cpu(tmp[i]);
+ memzero_explicit(tmp, sizeof(tmp));
+ } else {
+ for (i = 0; i < CHACHA_KEY_SIZE_WORDS; i++)
+ chacha20->key.u[i] ^= le32_to_cpu(buf[i + used_words]);
+ }
+
+ /* Deterministic increment of nonce as required in RFC 7539 chapter 4 */
+ chacha20->nonce[0]++;
+ if (chacha20->nonce[0] == 0) {
+ chacha20->nonce[1]++;
+ if (chacha20->nonce[1] == 0)
+ chacha20->nonce[2]++;
+ }
+
+ /* Leave counter untouched as it is start value is undefined in RFC */
+}
+
+/*
+ * Seed the ChaCha20 DRNG by injecting the input data into the key part of
+ * the ChaCha20 state. If the input data is longer than the ChaCha20 key size,
+ * perform a ChaCha20 operation after processing of key size input data.
+ * This operation shall spread out the entropy into the ChaCha20 state before
+ * new entropy is injected into the key part.
+ */
+static int lrng_cc20_drng_seed_helper(void *drng, const u8 *inbuf, u32 inbuflen)
+{
+ struct chacha20_state *chacha20_state = (struct chacha20_state *)drng;
+ struct chacha20_block *chacha20 = &chacha20_state->block;
+
+ while (inbuflen) {
+ u32 i, todo = min_t(u32, inbuflen, CHACHA_KEY_SIZE);
+
+ for (i = 0; i < todo; i++)
+ chacha20->key.b[i] ^= inbuf[i];
+
+ /* Break potential dependencies between the inbuf key blocks */
+ lrng_chacha20_update(chacha20_state, NULL,
+ CHACHA_BLOCK_WORDS);
+ inbuf += todo;
+ inbuflen -= todo;
+ }
+
+ return 0;
+}
+
+/*
+ * Chacha20 DRNG generation of random numbers: the stream output of ChaCha20
+ * is the random number. After the completion of the generation of the
+ * stream, the entire ChaCha20 state is updated.
+ *
+ * Note, as the ChaCha20 implements a 32 bit counter, we must ensure
+ * that this function is only invoked for at most 2^32 - 1 ChaCha20 blocks
+ * before a reseed or an update happens. This is ensured by the variable
+ * outbuflen which is a 32 bit integer defining the number of bytes to be
+ * generated by the ChaCha20 DRNG. At the end of this function, an update
+ * operation is invoked which implies that the 32 bit counter will never be
+ * overflown in this implementation.
+ */
+static int lrng_cc20_drng_generate_helper(void *drng, u8 *outbuf, u32 outbuflen)
+{
+ struct chacha20_state *chacha20_state = (struct chacha20_state *)drng;
+ struct chacha20_block *chacha20 = &chacha20_state->block;
+ __le32 aligned_buf[CHACHA_BLOCK_WORDS];
+ u32 ret = outbuflen, used = CHACHA_BLOCK_WORDS;
+ int zeroize_buf = 0;
+
+ while (outbuflen >= CHACHA_BLOCK_SIZE) {
+ chacha20_block(&chacha20->constants[0], outbuf);
+ outbuf += CHACHA_BLOCK_SIZE;
+ outbuflen -= CHACHA_BLOCK_SIZE;
+ }
+
+ if (outbuflen) {
+ chacha20_block(&chacha20->constants[0], (u8 *)aligned_buf);
+ memcpy(outbuf, aligned_buf, outbuflen);
+ used = ((outbuflen + sizeof(aligned_buf[0]) - 1) /
+ sizeof(aligned_buf[0]));
+ zeroize_buf = 1;
+ }
+
+ lrng_chacha20_update(chacha20_state, aligned_buf, used);
+
+ if (zeroize_buf)
+ memzero_explicit(aligned_buf, sizeof(aligned_buf));
+
+ return ret;
+}
+
+void lrng_cc20_init_state(struct chacha20_state *state)
+{
+ lrng_cc20_init_rfc7539(&state->block);
+}
+
+/*
+ * Allocation of the DRNG state
+ */
+static void *lrng_cc20_drng_alloc(u32 sec_strength)
+{
+ struct chacha20_state *state = NULL;
+
+ if (sec_strength > CHACHA_KEY_SIZE) {
+ pr_err("Security strength of ChaCha20 DRNG (%u bits) lower than requested by LRNG (%u bits)\n",
+ CHACHA_KEY_SIZE * 8, sec_strength * 8);
+ return ERR_PTR(-EINVAL);
+ }
+ if (sec_strength < CHACHA_KEY_SIZE)
+ pr_warn("Security strength of ChaCha20 DRNG (%u bits) higher than requested by LRNG (%u bits)\n",
+ CHACHA_KEY_SIZE * 8, sec_strength * 8);
+
+ state = kmalloc(sizeof(struct chacha20_state), GFP_KERNEL);
+ if (!state)
+ return ERR_PTR(-ENOMEM);
+ pr_debug("memory for ChaCha20 core allocated\n");
+
+ lrng_cc20_init_state(state);
+
+ return state;
+}
+
+static void lrng_cc20_drng_dealloc(void *drng)
+{
+ struct chacha20_state *chacha20_state = (struct chacha20_state *)drng;
+
+ if (drng == &chacha20) {
+ memzero_explicit(chacha20_state, sizeof(*chacha20_state));
+ pr_debug("static ChaCha20 core zeroized\n");
+ return;
+ }
+
+ pr_debug("ChaCha20 core zeroized and freed\n");
+ kfree_sensitive(chacha20_state);
+}
+
+/******************************* Hash Operation *******************************/
+
+#ifdef CONFIG_CRYPTO_LIB_SHA256
+
+#include <crypto/sha2.h>
+
+static u32 lrng_cc20_hash_digestsize(void *hash)
+{
+ return SHA256_DIGEST_SIZE;
+}
+
+static int lrng_cc20_hash_init(struct shash_desc *shash, void *hash)
+{
+ /*
+ * We do not need a TFM - we only need sufficient space for
+ * struct sha256_state on the stack.
+ */
+ sha256_init(shash_desc_ctx(shash));
+ return 0;
+}
+
+static int lrng_cc20_hash_update(struct shash_desc *shash,
+ const u8 *inbuf, u32 inbuflen)
+{
+ sha256_update(shash_desc_ctx(shash), inbuf, inbuflen);
+ return 0;
+}
+
+static int lrng_cc20_hash_final(struct shash_desc *shash, u8 *digest)
+{
+ sha256_final(shash_desc_ctx(shash), digest);
+ return 0;
+}
+
+static const char *lrng_cc20_hash_name(void)
+{
+ return "SHA-256";
+}
+
+static void lrng_cc20_hash_desc_zero(struct shash_desc *shash)
+{
+ memzero_explicit(shash_desc_ctx(shash), sizeof(struct sha256_state));
+}
+
+#else /* CONFIG_CRYPTO_LIB_SHA256 */
+
+#include <crypto/sha1.h>
+#include <crypto/sha1_base.h>
+
+/*
+ * If the SHA-256 support is not compiled, we fall back to SHA-1 that is always
+ * compiled and present in the kernel.
+ */
+static u32 lrng_cc20_hash_digestsize(void *hash)
+{
+ return SHA1_DIGEST_SIZE;
+}
+
+static void lrng_sha1_block_fn(struct sha1_state *sctx, const u8 *src,
+ int blocks)
+{
+ u32 temp[SHA1_WORKSPACE_WORDS];
+
+ while (blocks--) {
+ sha1_transform(sctx->state, src, temp);
+ src += SHA1_BLOCK_SIZE;
+ }
+ memzero_explicit(temp, sizeof(temp));
+}
+
+static int lrng_cc20_hash_init(struct shash_desc *shash, void *hash)
+{
+ /*
+ * We do not need a TFM - we only need sufficient space for
+ * struct sha1_state on the stack.
+ */
+ sha1_base_init(shash);
+ return 0;
+}
+
+static int lrng_cc20_hash_update(struct shash_desc *shash,
+ const u8 *inbuf, u32 inbuflen)
+{
+ return sha1_base_do_update(shash, inbuf, inbuflen, lrng_sha1_block_fn);
+}
+
+static int lrng_cc20_hash_final(struct shash_desc *shash, u8 *digest)
+{
+ return sha1_base_do_finalize(shash, lrng_sha1_block_fn) ?:
+ sha1_base_finish(shash, digest);
+}
+
+static const char *lrng_cc20_hash_name(void)
+{
+ return "SHA-1";
+}
+
+static void lrng_cc20_hash_desc_zero(struct shash_desc *shash)
+{
+ memzero_explicit(shash_desc_ctx(shash), sizeof(struct sha1_state));
+}
+
+#endif /* CONFIG_CRYPTO_LIB_SHA256 */
+
+static void *lrng_cc20_hash_alloc(void)
+{
+ pr_info("Hash %s allocated\n", lrng_cc20_hash_name());
+ return NULL;
+}
+
+static void lrng_cc20_hash_dealloc(void *hash)
+{
+}
+
+static const char *lrng_cc20_drng_name(void)
+{
+ return "ChaCha20 DRNG";
+}
+
+const struct lrng_crypto_cb lrng_cc20_crypto_cb = {
+ .lrng_drng_name = lrng_cc20_drng_name,
+ .lrng_hash_name = lrng_cc20_hash_name,
+ .lrng_drng_alloc = lrng_cc20_drng_alloc,
+ .lrng_drng_dealloc = lrng_cc20_drng_dealloc,
+ .lrng_drng_seed_helper = lrng_cc20_drng_seed_helper,
+ .lrng_drng_generate_helper = lrng_cc20_drng_generate_helper,
+ .lrng_hash_alloc = lrng_cc20_hash_alloc,
+ .lrng_hash_dealloc = lrng_cc20_hash_dealloc,
+ .lrng_hash_digestsize = lrng_cc20_hash_digestsize,
+ .lrng_hash_init = lrng_cc20_hash_init,
+ .lrng_hash_update = lrng_cc20_hash_update,
+ .lrng_hash_final = lrng_cc20_hash_final,
+ .lrng_hash_desc_zero = lrng_cc20_hash_desc_zero,
+};
diff -urN linux-5.15/drivers/char/lrng/lrng_chacha20.h linux-5.15-lrng/drivers/char/lrng/lrng_chacha20.h
--- linux-5.15/drivers/char/lrng/lrng_chacha20.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_chacha20.h 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * LRNG ChaCha20 definitions
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#include <crypto/chacha.h>
+
+/* State according to RFC 7539 section 2.3 */
+struct chacha20_block {
+ u32 constants[4];
+ union {
+#define CHACHA_KEY_SIZE_WORDS (CHACHA_KEY_SIZE / sizeof(u32))
+ u32 u[CHACHA_KEY_SIZE_WORDS];
+ u8 b[CHACHA_KEY_SIZE];
+ } key;
+ u32 counter;
+ u32 nonce[3];
+};
+
+static inline void lrng_cc20_init_rfc7539(struct chacha20_block *chacha20)
+{
+ chacha_init_consts(chacha20->constants);
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_drbg.c linux-5.15-lrng/drivers/char/lrng/lrng_drbg.c
--- linux-5.15/drivers/char/lrng/lrng_drbg.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_drbg.c 2021-11-29 12:37:37.193279002 +1100
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Backend for the LRNG providing the cryptographic primitives using the
+ * kernel crypto API and its DRBG.
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/drbg.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/lrng.h>
+
+#include "lrng_kcapi_hash.h"
+
+/*
+ * Define a DRBG plus a hash / MAC used to extract data from the entropy pool.
+ * For LRNG_HASH_NAME you can use a hash or a MAC (HMAC or CMAC) of your choice
+ * (Note, you should use the suggested selections below -- using SHA-1 or MD5
+ * is not wise). The idea is that the used cipher primitive can be selected to
+ * be the same as used for the DRBG. I.e. the LRNG only uses one cipher
+ * primitive using the same cipher implementation with the options offered in
+ * the following. This means, if the CTR DRBG is selected and AES-NI is present,
+ * both the CTR DRBG and the selected cmac(aes) use AES-NI.
+ *
+ * The security strengths of the DRBGs are all 256 bits according to
+ * SP800-57 section 5.6.1.
+ *
+ * This definition is allowed to be changed.
+ */
+#ifdef CONFIG_CRYPTO_DRBG_CTR
+static unsigned int lrng_drbg_type = 0;
+#elif defined CONFIG_CRYPTO_DRBG_HMAC
+static unsigned int lrng_drbg_type = 1;
+#elif defined CONFIG_CRYPTO_DRBG_HASH
+static unsigned int lrng_drbg_type = 2;
+#else
+#error "Unknown DRBG in use"
+#endif
+
+/* The parameter must be r/o in sysfs as otherwise races appear. */
+module_param(lrng_drbg_type, uint, 0444);
+MODULE_PARM_DESC(lrng_drbg_type, "DRBG type used for LRNG (0->CTR_DRBG, 1->HMAC_DRBG, 2->Hash_DRBG)");
+
+struct lrng_drbg {
+ const char *hash_name;
+ const char *drbg_core;
+};
+
+static const struct lrng_drbg lrng_drbg_types[] = {
+ { /* CTR_DRBG with AES-256 using derivation function */
+ .hash_name = "sha512",
+ .drbg_core = "drbg_nopr_ctr_aes256",
+ }, { /* HMAC_DRBG with SHA-512 */
+ .hash_name = "sha512",
+ .drbg_core = "drbg_nopr_hmac_sha512",
+ }, { /* Hash_DRBG with SHA-512 using derivation function */
+ .hash_name = "sha512",
+ .drbg_core = "drbg_nopr_sha512"
+ }
+};
+
+static int lrng_drbg_drng_seed_helper(void *drng, const u8 *inbuf, u32 inbuflen)
+{
+ struct drbg_state *drbg = (struct drbg_state *)drng;
+ LIST_HEAD(seedlist);
+ struct drbg_string data;
+ int ret;
+
+ drbg_string_fill(&data, inbuf, inbuflen);
+ list_add_tail(&data.list, &seedlist);
+ ret = drbg->d_ops->update(drbg, &seedlist, drbg->seeded);
+
+ if (ret >= 0)
+ drbg->seeded = true;
+
+ return ret;
+}
+
+static int lrng_drbg_drng_generate_helper(void *drng, u8 *outbuf, u32 outbuflen)
+{
+ struct drbg_state *drbg = (struct drbg_state *)drng;
+
+ return drbg->d_ops->generate(drbg, outbuf, outbuflen, NULL);
+}
+
+static void *lrng_drbg_drng_alloc(u32 sec_strength)
+{
+ struct drbg_state *drbg;
+ int coreref = -1;
+ bool pr = false;
+ int ret;
+
+ drbg_convert_tfm_core(lrng_drbg_types[lrng_drbg_type].drbg_core,
+ &coreref, &pr);
+ if (coreref < 0)
+ return ERR_PTR(-EFAULT);
+
+ drbg = kzalloc(sizeof(struct drbg_state), GFP_KERNEL);
+ if (!drbg)
+ return ERR_PTR(-ENOMEM);
+
+ drbg->core = &drbg_cores[coreref];
+ drbg->seeded = false;
+ ret = drbg_alloc_state(drbg);
+ if (ret)
+ goto err;
+
+ if (sec_strength > drbg_sec_strength(drbg->core->flags)) {
+ pr_err("Security strength of DRBG (%u bits) lower than requested by LRNG (%u bits)\n",
+ drbg_sec_strength(drbg->core->flags) * 8,
+ sec_strength * 8);
+ goto dealloc;
+ }
+
+ if (sec_strength < drbg_sec_strength(drbg->core->flags))
+ pr_warn("Security strength of DRBG (%u bits) higher than requested by LRNG (%u bits)\n",
+ drbg_sec_strength(drbg->core->flags) * 8,
+ sec_strength * 8);
+
+ pr_info("DRBG with %s core allocated\n", drbg->core->backend_cra_name);
+
+ return drbg;
+
+dealloc:
+ if (drbg->d_ops)
+ drbg->d_ops->crypto_fini(drbg);
+ drbg_dealloc_state(drbg);
+err:
+ kfree(drbg);
+ return ERR_PTR(-EINVAL);
+}
+
+static void lrng_drbg_drng_dealloc(void *drng)
+{
+ struct drbg_state *drbg = (struct drbg_state *)drng;
+
+ if (drbg && drbg->d_ops)
+ drbg->d_ops->crypto_fini(drbg);
+ drbg_dealloc_state(drbg);
+ kfree_sensitive(drbg);
+ pr_info("DRBG deallocated\n");
+}
+
+static void *lrng_drbg_hash_alloc(void)
+{
+ return lrng_kcapi_hash_alloc(lrng_drbg_types[lrng_drbg_type].hash_name);
+}
+
+static const char *lrng_drbg_name(void)
+{
+ return lrng_drbg_types[lrng_drbg_type].drbg_core;
+}
+
+static const char *lrng_hash_name(void)
+{
+ return lrng_drbg_types[lrng_drbg_type].hash_name;
+}
+
+static const struct lrng_crypto_cb lrng_drbg_crypto_cb = {
+ .lrng_drng_name = lrng_drbg_name,
+ .lrng_hash_name = lrng_hash_name,
+ .lrng_drng_alloc = lrng_drbg_drng_alloc,
+ .lrng_drng_dealloc = lrng_drbg_drng_dealloc,
+ .lrng_drng_seed_helper = lrng_drbg_drng_seed_helper,
+ .lrng_drng_generate_helper = lrng_drbg_drng_generate_helper,
+ .lrng_hash_alloc = lrng_drbg_hash_alloc,
+ .lrng_hash_dealloc = lrng_kcapi_hash_dealloc,
+ .lrng_hash_digestsize = lrng_kcapi_hash_digestsize,
+ .lrng_hash_init = lrng_kcapi_hash_init,
+ .lrng_hash_update = lrng_kcapi_hash_update,
+ .lrng_hash_final = lrng_kcapi_hash_final,
+ .lrng_hash_desc_zero = lrng_kcapi_hash_zero,
+};
+
+static int __init lrng_drbg_init(void)
+{
+ if (lrng_drbg_type >= ARRAY_SIZE(lrng_drbg_types)) {
+ pr_err("lrng_drbg_type parameter too large (given %u - max: %lu)",
+ lrng_drbg_type,
+ (unsigned long)ARRAY_SIZE(lrng_drbg_types) - 1);
+ return -EAGAIN;
+ }
+ return lrng_set_drng_cb(&lrng_drbg_crypto_cb);
+}
+
+static void __exit lrng_drbg_exit(void)
+{
+ lrng_set_drng_cb(NULL);
+}
+
+late_initcall(lrng_drbg_init);
+module_exit(lrng_drbg_exit);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
+MODULE_DESCRIPTION("Linux Random Number Generator - SP800-90A DRBG backend");
diff -urN linux-5.15/drivers/char/lrng/lrng_drng.c linux-5.15-lrng/drivers/char/lrng/lrng_drng.c
--- linux-5.15/drivers/char/lrng/lrng_drng.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_drng.c 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG DRNG processing
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/fips.h>
+#include <linux/lrng.h>
+
+#include "lrng_internal.h"
+
+/*
+ * Maximum number of seconds between DRNG reseed intervals of the DRNG. Note,
+ * this is enforced with the next request of random numbers from the
+ * DRNG. Setting this value to zero implies a reseeding attempt before every
+ * generated random number.
+ */
+int lrng_drng_reseed_max_time = 600;
+
+static atomic_t lrng_avail = ATOMIC_INIT(0);
+
+DEFINE_MUTEX(lrng_crypto_cb_update);
+
+/* DRNG for /dev/urandom, getrandom(2), get_random_bytes */
+static struct lrng_drng lrng_drng_init = {
+ .drng = &chacha20,
+ .crypto_cb = &lrng_cc20_crypto_cb,
+ .lock = __MUTEX_INITIALIZER(lrng_drng_init.lock),
+ .spin_lock = __SPIN_LOCK_UNLOCKED(lrng_drng_init.spin_lock),
+ .hash_lock = __RW_LOCK_UNLOCKED(lrng_drng_init.hash_lock)
+};
+
+/*
+ * DRNG for get_random_bytes when called in atomic context. This
+ * DRNG will always use the ChaCha20 DRNG. It will never benefit from a
+ * DRNG switch like the "regular" DRNG. If there was no DRNG switch, the atomic
+ * DRNG is identical to the "regular" DRNG.
+ *
+ * The reason for having this is due to the fact that DRNGs other than
+ * the ChaCha20 DRNG may sleep.
+ */
+static struct lrng_drng lrng_drng_atomic = {
+ .drng = &chacha20,
+ .crypto_cb = &lrng_cc20_crypto_cb,
+ .spin_lock = __SPIN_LOCK_UNLOCKED(lrng_drng_atomic.spin_lock),
+ .hash_lock = __RW_LOCK_UNLOCKED(lrng_drng_atomic.hash_lock)
+};
+
+static u32 max_wo_reseed = LRNG_DRNG_MAX_WITHOUT_RESEED;
+#ifdef CONFIG_LRNG_RUNTIME_MAX_WO_RESEED_CONFIG
+module_param(max_wo_reseed, uint, 0444);
+MODULE_PARM_DESC(max_wo_reseed,
+ "Maximum number of DRNG generate operation without full reseed\n");
+#endif
+
+/********************************** Helper ************************************/
+
+bool lrng_get_available(void)
+{
+ return likely(atomic_read(&lrng_avail));
+}
+
+void lrng_set_available(void)
+{
+ atomic_set(&lrng_avail, 1);
+}
+
+struct lrng_drng *lrng_drng_init_instance(void)
+{
+ return &lrng_drng_init;
+}
+
+struct lrng_drng *lrng_drng_atomic_instance(void)
+{
+ return &lrng_drng_atomic;
+}
+
+void lrng_drng_reset(struct lrng_drng *drng)
+{
+ atomic_set(&drng->requests, LRNG_DRNG_RESEED_THRESH);
+ atomic_set(&drng->requests_since_fully_seeded, 0);
+ drng->last_seeded = jiffies;
+ drng->fully_seeded = false;
+ drng->force_reseed = true;
+ pr_debug("reset DRNG\n");
+}
+
+/* Initialize the default DRNG during boot */
+static void lrng_drng_seed(struct lrng_drng *drng);
+void lrng_drngs_init_cc20(bool force_seed)
+{
+ unsigned long flags = 0;
+
+ if (lrng_get_available())
+ return;
+
+ lrng_drng_lock(&lrng_drng_init, &flags);
+ if (lrng_get_available()) {
+ lrng_drng_unlock(&lrng_drng_init, &flags);
+ if (force_seed)
+ goto seed;
+ return;
+ }
+
+ lrng_drng_reset(&lrng_drng_init);
+ lrng_cc20_init_state(&chacha20);
+ lrng_drng_unlock(&lrng_drng_init, &flags);
+
+ lrng_drng_lock(&lrng_drng_atomic, &flags);
+ lrng_drng_reset(&lrng_drng_atomic);
+ /*
+ * We do not initialize the state of the atomic DRNG as it is identical
+ * to the DRNG at this point.
+ */
+ lrng_drng_unlock(&lrng_drng_atomic, &flags);
+
+ lrng_set_available();
+
+seed:
+ /* Seed the DRNG with any entropy available */
+ if (!lrng_pool_trylock()) {
+ lrng_drng_seed(&lrng_drng_init);
+ pr_info("ChaCha20 core initialized with first seeding\n");
+ lrng_pool_unlock();
+ } else {
+ pr_info("ChaCha20 core initialized without seeding\n");
+ }
+}
+
+bool lrng_sp80090c_compliant(void)
+{
+ if (!IS_ENABLED(CONFIG_LRNG_OVERSAMPLE_ENTROPY_SOURCES))
+ return false;
+
+ /* Entropy source hash must be capable of transporting enough entropy */
+ if (lrng_get_digestsize() <
+ (lrng_security_strength() + CONFIG_LRNG_SEED_BUFFER_INIT_ADD_BITS))
+ return false;
+
+ /* SP800-90C only requested in FIPS mode */
+ return fips_enabled;
+}
+
+/************************* Random Number Generation ***************************/
+
+/* Inject a data buffer into the DRNG */
+static void lrng_drng_inject(struct lrng_drng *drng,
+ const u8 *inbuf, u32 inbuflen, bool fully_seeded)
+{
+ const char *drng_type = unlikely(drng == &lrng_drng_atomic) ?
+ "atomic" : "regular";
+ unsigned long flags = 0;
+
+ BUILD_BUG_ON(LRNG_DRNG_RESEED_THRESH > INT_MAX);
+ pr_debug("seeding %s DRNG with %u bytes\n", drng_type, inbuflen);
+ lrng_drng_lock(drng, &flags);
+ if (drng->crypto_cb->lrng_drng_seed_helper(drng->drng,
+ inbuf, inbuflen) < 0) {
+ pr_warn("seeding of %s DRNG failed\n", drng_type);
+ drng->force_reseed = true;
+ } else {
+ int gc = LRNG_DRNG_RESEED_THRESH - atomic_read(&drng->requests);
+
+ pr_debug("%s DRNG stats since last seeding: %lu secs; generate calls: %d\n",
+ drng_type,
+ (time_after(jiffies, drng->last_seeded) ?
+ (jiffies - drng->last_seeded) : 0) / HZ, gc);
+
+ /* Count the numbers of generate ops since last fully seeded */
+ if (fully_seeded)
+ atomic_set(&drng->requests_since_fully_seeded, 0);
+ else
+ atomic_add(gc, &drng->requests_since_fully_seeded);
+
+ drng->last_seeded = jiffies;
+ atomic_set(&drng->requests, LRNG_DRNG_RESEED_THRESH);
+ drng->force_reseed = false;
+
+ if (!drng->fully_seeded) {
+ drng->fully_seeded = fully_seeded;
+ if (drng->fully_seeded)
+ pr_debug("DRNG fully seeded\n");
+ }
+
+ if (drng->drng == lrng_drng_atomic.drng) {
+ lrng_drng_atomic.last_seeded = jiffies;
+ atomic_set(&lrng_drng_atomic.requests,
+ LRNG_DRNG_RESEED_THRESH);
+ lrng_drng_atomic.force_reseed = false;
+ }
+ }
+ lrng_drng_unlock(drng, &flags);
+}
+
+/*
+ * Perform the seeding of the DRNG with data from noise source
+ */
+static inline void _lrng_drng_seed(struct lrng_drng *drng)
+{
+ struct entropy_buf seedbuf __aligned(LRNG_KCAPI_ALIGN);
+
+ lrng_fill_seed_buffer(&seedbuf,
+ lrng_get_seed_entropy_osr(drng->fully_seeded));
+ lrng_init_ops(&seedbuf);
+ lrng_drng_inject(drng, (u8 *)&seedbuf, sizeof(seedbuf),
+ lrng_fully_seeded(drng->fully_seeded, &seedbuf));
+ memzero_explicit(&seedbuf, sizeof(seedbuf));
+}
+
+static int lrng_drng_get(struct lrng_drng *drng, u8 *outbuf, u32 outbuflen);
+static void lrng_drng_seed(struct lrng_drng *drng)
+{
+ _lrng_drng_seed(drng);
+
+ BUILD_BUG_ON(LRNG_MIN_SEED_ENTROPY_BITS >
+ LRNG_DRNG_SECURITY_STRENGTH_BITS);
+
+ /*
+ * Reseed atomic DRNG from current DRNG,
+ *
+ * We can obtain random numbers from DRNG as the lock type
+ * chosen by lrng_drng_get is usable with the current caller.
+ */
+ if ((drng->drng != lrng_drng_atomic.drng) &&
+ (lrng_drng_atomic.force_reseed ||
+ atomic_read(&lrng_drng_atomic.requests) <= 0 ||
+ time_after(jiffies, lrng_drng_atomic.last_seeded +
+ lrng_drng_reseed_max_time * HZ))) {
+ u8 seedbuf[LRNG_DRNG_SECURITY_STRENGTH_BYTES]
+ __aligned(LRNG_KCAPI_ALIGN);
+ int ret = lrng_drng_get(drng, seedbuf, sizeof(seedbuf));
+
+ if (ret < 0) {
+ pr_warn("Error generating random numbers for atomic DRNG: %d\n",
+ ret);
+ } else {
+ lrng_drng_inject(&lrng_drng_atomic, seedbuf, ret, true);
+ }
+ memzero_explicit(&seedbuf, sizeof(seedbuf));
+ }
+}
+
+static inline void _lrng_drng_seed_work(struct lrng_drng *drng, u32 node)
+{
+ pr_debug("reseed triggered by interrupt noise source for DRNG on NUMA node %d\n",
+ node);
+ lrng_drng_seed(drng);
+ if (drng->fully_seeded) {
+ /* Prevent reseed storm */
+ drng->last_seeded += node * 100 * HZ;
+ /* Prevent draining of pool on idle systems */
+ lrng_drng_reseed_max_time += 100;
+ }
+}
+
+/*
+ * DRNG reseed trigger: Kernel thread handler triggered by the schedule_work()
+ */
+void lrng_drng_seed_work(struct work_struct *dummy)
+{
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ u32 node;
+
+ if (lrng_drng) {
+ for_each_online_node(node) {
+ struct lrng_drng *drng = lrng_drng[node];
+
+ if (drng && !drng->fully_seeded) {
+ _lrng_drng_seed_work(drng, node);
+ goto out;
+ }
+ }
+ } else {
+ if (!lrng_drng_init.fully_seeded) {
+ _lrng_drng_seed_work(&lrng_drng_init, 0);
+ goto out;
+ }
+ }
+
+ lrng_pool_all_numa_nodes_seeded(true);
+
+out:
+ /* Allow the seeding operation to be called again */
+ lrng_pool_unlock();
+}
+
+/* Force all DRNGs to reseed before next generation */
+void lrng_drng_force_reseed(void)
+{
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ u32 node;
+
+ /*
+ * If the initial DRNG is over the reseed threshold, allow a forced
+ * reseed only for the initial DRNG as this is the fallback for all. It
+ * must be kept seeded before all others to keep the LRNG operational.
+ */
+ if (!lrng_drng ||
+ (atomic_read_u32(&lrng_drng_init.requests_since_fully_seeded) >
+ LRNG_DRNG_RESEED_THRESH)) {
+ lrng_drng_init.force_reseed = lrng_drng_init.fully_seeded;
+ pr_debug("force reseed of initial DRNG\n");
+ return;
+ }
+ for_each_online_node(node) {
+ struct lrng_drng *drng = lrng_drng[node];
+
+ if (!drng)
+ continue;
+
+ drng->force_reseed = drng->fully_seeded;
+ pr_debug("force reseed of DRNG on node %u\n", node);
+ }
+ lrng_drng_atomic.force_reseed = lrng_drng_atomic.fully_seeded;
+}
+
+/*
+ * lrng_drng_get() - Get random data out of the DRNG which is reseeded
+ * frequently.
+ *
+ * @outbuf: buffer for storing random data
+ * @outbuflen: length of outbuf
+ *
+ * Return:
+ * * < 0 in error case (DRNG generation or update failed)
+ * * >=0 returning the returned number of bytes
+ */
+static int lrng_drng_get(struct lrng_drng *drng, u8 *outbuf, u32 outbuflen)
+{
+ unsigned long flags = 0;
+ u32 processed = 0;
+
+ if (!outbuf || !outbuflen)
+ return 0;
+
+ outbuflen = min_t(size_t, outbuflen, INT_MAX);
+
+ lrng_drngs_init_cc20(false);
+
+ /* If DRNG operated without proper reseed for too long, block LRNG */
+ BUILD_BUG_ON(LRNG_DRNG_MAX_WITHOUT_RESEED < LRNG_DRNG_RESEED_THRESH);
+ if (atomic_read_u32(&drng->requests_since_fully_seeded) > max_wo_reseed)
+ lrng_unset_fully_seeded(drng);
+
+ while (outbuflen) {
+ u32 todo = min_t(u32, outbuflen, LRNG_DRNG_MAX_REQSIZE);
+ int ret;
+
+ /* All but the atomic DRNG are seeded during generation */
+ if (atomic_dec_and_test(&drng->requests) ||
+ drng->force_reseed ||
+ time_after(jiffies, drng->last_seeded +
+ lrng_drng_reseed_max_time * HZ)) {
+ if (likely(drng != &lrng_drng_atomic)) {
+ if (lrng_pool_trylock()) {
+ drng->force_reseed = true;
+ } else {
+ lrng_drng_seed(drng);
+ lrng_pool_unlock();
+ }
+ }
+ }
+
+ lrng_drng_lock(drng, &flags);
+ ret = drng->crypto_cb->lrng_drng_generate_helper(
+ drng->drng, outbuf + processed, todo);
+ lrng_drng_unlock(drng, &flags);
+ if (ret <= 0) {
+ pr_warn("getting random data from DRNG failed (%d)\n",
+ ret);
+ return -EFAULT;
+ }
+ processed += ret;
+ outbuflen -= ret;
+ }
+
+ return processed;
+}
+
+int lrng_drng_get_atomic(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_drng_get(&lrng_drng_atomic, outbuf, outbuflen);
+}
+
+int lrng_drng_get_sleep(u8 *outbuf, u32 outbuflen)
+{
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ struct lrng_drng *drng = &lrng_drng_init;
+ int node = numa_node_id();
+
+ might_sleep();
+
+ if (lrng_drng && lrng_drng[node] && lrng_drng[node]->fully_seeded)
+ drng = lrng_drng[node];
+
+ return lrng_drng_get(drng, outbuf, outbuflen);
+}
+
+/* Reset LRNG such that all existing entropy is gone */
+static void _lrng_reset(struct work_struct *work)
+{
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ unsigned long flags = 0;
+
+ if (!lrng_drng) {
+ lrng_drng_lock(&lrng_drng_init, &flags);
+ lrng_drng_reset(&lrng_drng_init);
+ lrng_drng_unlock(&lrng_drng_init, &flags);
+ } else {
+ u32 node;
+
+ for_each_online_node(node) {
+ struct lrng_drng *drng = lrng_drng[node];
+
+ if (!drng)
+ continue;
+ lrng_drng_lock(drng, &flags);
+ lrng_drng_reset(drng);
+ lrng_drng_unlock(drng, &flags);
+ }
+ }
+ lrng_set_entropy_thresh(LRNG_INIT_ENTROPY_BITS);
+
+ lrng_reset_state();
+}
+
+static DECLARE_WORK(lrng_reset_work, _lrng_reset);
+
+void lrng_reset(void)
+{
+ schedule_work(&lrng_reset_work);
+}
+
+/***************************** Initialize LRNG *******************************/
+
+static int __init lrng_init(void)
+{
+ lrng_drngs_init_cc20(false);
+
+ lrng_drngs_numa_alloc();
+ return 0;
+}
+
+late_initcall(lrng_init);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
+MODULE_DESCRIPTION("Linux Random Number Generator");
diff -urN linux-5.15/drivers/char/lrng/lrng_es_archrandom.c linux-5.15-lrng/drivers/char/lrng/lrng_es_archrandom.c
--- linux-5.15/drivers/char/lrng/lrng_es_archrandom.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_archrandom.c 2021-11-29 12:37:14.483279088 +1100
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG Fast Entropy Source: CPU-based entropy source
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/hash.h>
+#include <linux/lrng.h>
+#include <linux/random.h>
+
+#include "lrng_internal.h"
+
+/*
+ * Estimated entropy of data is a 32th of LRNG_DRNG_SECURITY_STRENGTH_BITS.
+ * As we have no ability to review the implementation of those noise sources,
+ * it is prudent to have a conservative estimate here.
+ */
+#define LRNG_ARCHRANDOM_DEFAULT_STRENGTH CONFIG_LRNG_CPU_ENTROPY_RATE
+#define LRNG_ARCHRANDOM_TRUST_CPU_STRENGTH LRNG_DRNG_SECURITY_STRENGTH_BITS
+#ifdef CONFIG_RANDOM_TRUST_CPU
+static u32 archrandom = LRNG_ARCHRANDOM_TRUST_CPU_STRENGTH;
+#else
+static u32 archrandom = LRNG_ARCHRANDOM_DEFAULT_STRENGTH;
+#endif
+#ifdef CONFIG_LRNG_RUNTIME_ES_CONFIG
+module_param(archrandom, uint, 0644);
+MODULE_PARM_DESC(archrandom, "Entropy in bits of 256 data bits from CPU noise source (e.g. RDSEED)");
+#endif
+
+static int __init lrng_parse_trust_cpu(char *arg)
+{
+ int ret;
+ bool trust_cpu = false;
+
+ ret = kstrtobool(arg, &trust_cpu);
+ if (ret)
+ return ret;
+
+ if (trust_cpu) {
+ archrandom = LRNG_ARCHRANDOM_TRUST_CPU_STRENGTH;
+ lrng_pool_add_entropy();
+ } else {
+ archrandom = LRNG_ARCHRANDOM_DEFAULT_STRENGTH;
+ }
+
+ return 0;
+}
+early_param("random.trust_cpu", lrng_parse_trust_cpu);
+
+u32 lrng_archrandom_entropylevel(u32 requested_bits)
+{
+ return lrng_fast_noise_entropylevel(archrandom, requested_bits);
+}
+
+static u32 lrng_get_arch_data(u8 *outbuf, u32 requested_bits)
+{
+ u32 i;
+
+ /* operate on full blocks */
+ BUILD_BUG_ON(LRNG_DRNG_SECURITY_STRENGTH_BYTES % sizeof(unsigned long));
+ BUILD_BUG_ON(CONFIG_LRNG_SEED_BUFFER_INIT_ADD_BITS %
+ sizeof(unsigned long));
+ /* ensure we have aligned buffers */
+ BUILD_BUG_ON(LRNG_KCAPI_ALIGN % sizeof(unsigned long));
+
+ for (i = 0; i < (requested_bits >> 3);
+ i += sizeof(unsigned long)) {
+ if (!arch_get_random_seed_long((unsigned long *)(outbuf + i)) &&
+ !arch_get_random_long((unsigned long *)(outbuf + i))) {
+ archrandom = 0;
+ return 0;
+ }
+ }
+
+ return requested_bits;
+}
+
+static u32 inline lrng_get_arch_data_compress(u8 *outbuf, u32 requested_bits,
+ u32 data_multiplier)
+{
+ SHASH_DESC_ON_STACK(shash, NULL);
+ const struct lrng_crypto_cb *crypto_cb;
+ struct lrng_drng *drng = lrng_drng_init_instance();
+ unsigned long flags;
+ u32 ent_bits = 0, i, partial_bits = 0,
+ full_bits = requested_bits * data_multiplier;
+ void *hash;
+
+ /* Calculate oversampling for SP800-90C */
+ if (lrng_sp80090c_compliant()) {
+ /* Complete amount of bits to be pulled */
+ full_bits += CONFIG_LRNG_OVERSAMPLE_ES_BITS * data_multiplier;
+ /* Full blocks that will be pulled */
+ data_multiplier = full_bits / requested_bits;
+ /* Partial block in bits to be pulled */
+ partial_bits = full_bits - (data_multiplier * requested_bits);
+ }
+
+ lrng_hash_lock(drng, &flags);
+ crypto_cb = drng->crypto_cb;
+ hash = drng->hash;
+
+ if (crypto_cb->lrng_hash_init(shash, hash))
+ goto out;
+
+ /* Hash all data from the CPU entropy source */
+ for (i = 0; i < data_multiplier; i++) {
+ ent_bits = lrng_get_arch_data(outbuf, requested_bits);
+ if (!ent_bits)
+ goto out;
+
+ if (crypto_cb->lrng_hash_update(shash, outbuf, ent_bits >> 3))
+ goto err;
+ }
+
+ /* Hash partial block, if applicable */
+ ent_bits = lrng_get_arch_data(outbuf, partial_bits);
+ if (ent_bits &&
+ crypto_cb->lrng_hash_update(shash, outbuf, ent_bits >> 3))
+ goto err;
+
+ pr_debug("pulled %u bits from CPU RNG entropy source\n", full_bits);
+
+ /* Generate the compressed data to be returned to the caller */
+ ent_bits = crypto_cb->lrng_hash_digestsize(hash) << 3;
+ if (requested_bits < ent_bits) {
+ u8 digest[LRNG_MAX_DIGESTSIZE];
+
+ if (crypto_cb->lrng_hash_final(shash, digest))
+ goto err;
+
+ /* Truncate output data to requested size */
+ memcpy(outbuf, digest, requested_bits >> 3);
+ memzero_explicit(digest, crypto_cb->lrng_hash_digestsize(hash));
+ ent_bits = requested_bits;
+ } else {
+ if (crypto_cb->lrng_hash_final(shash, outbuf))
+ goto err;
+ }
+
+out:
+ crypto_cb->lrng_hash_desc_zero(shash);
+ lrng_hash_unlock(drng, flags);
+ return ent_bits;
+
+err:
+ ent_bits = 0;
+ goto out;
+}
+
+/*
+ * If CPU entropy source requires does not return full entropy, return the
+ * multiplier of how much data shall be sampled from it.
+ */
+static u32 lrng_arch_multiplier(void)
+{
+ static u32 data_multiplier = 0;
+
+ if (data_multiplier > 0) {
+ return data_multiplier;
+ } else {
+ unsigned long v;
+
+ if (IS_ENABLED(CONFIG_X86) && !arch_get_random_seed_long(&v)) {
+ /*
+ * Intel SPEC: pulling 512 blocks from RDRAND ensures
+ * one reseed making it logically equivalent to RDSEED.
+ */
+ data_multiplier = 512;
+ } else if (IS_ENABLED(CONFIG_PPC)) {
+ /*
+ * PowerISA defines DARN to deliver at least 0.5 bits of
+ * entropy per data bit.
+ */
+ data_multiplier = 2;
+ } else {
+ /* CPU provides full entropy */
+ data_multiplier = CONFIG_LRNG_CPU_FULL_ENT_MULTIPLIER;
+ }
+ }
+ return data_multiplier;
+}
+
+/*
+ * lrng_get_arch() - Get CPU entropy source entropy
+ *
+ * @outbuf: buffer to store entropy of size requested_bits
+ *
+ * Return:
+ * * > 0 on success where value provides the added entropy in bits
+ * * 0 if no fast source was available
+ */
+u32 lrng_get_arch(u8 *outbuf, u32 requested_bits)
+{
+ u32 ent_bits, data_multiplier = lrng_arch_multiplier();
+
+ if (data_multiplier <= 1) {
+ ent_bits = lrng_get_arch_data(outbuf, requested_bits);
+ } else {
+ ent_bits = lrng_get_arch_data_compress(outbuf, requested_bits,
+ data_multiplier);
+ }
+
+ ent_bits = lrng_archrandom_entropylevel(ent_bits);
+ pr_debug("obtained %u bits of entropy from CPU RNG entropy source\n",
+ ent_bits);
+ return ent_bits;
+}
+
+void lrng_arch_es_state(unsigned char *buf, size_t buflen)
+{
+ const struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+ u32 data_multiplier = lrng_arch_multiplier();
+
+ /* Assume the lrng_drng_init lock is taken by caller */
+ snprintf(buf, buflen,
+ "CPU ES properties:\n"
+ " Hash for compressing data: %s\n"
+ " Data multiplier: %u\n",
+ (data_multiplier <= 1) ?
+ "N/A" : lrng_drng_init->crypto_cb->lrng_hash_name(),
+ data_multiplier);
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_es_aux.c linux-5.15-lrng/drivers/char/lrng/lrng_es_aux.c
--- linux-5.15/drivers/char/lrng/lrng_es_aux.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_aux.c 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG Slow Entropy Source: Auxiliary entropy pool
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/lrng.h>
+
+#include "lrng_internal.h"
+
+/*
+ * This is the auxiliary pool
+ *
+ * The aux pool array is aligned to 8 bytes to comfort the kernel crypto API
+ * cipher implementations of the hash functions used to read the pool: for some
+ * accelerated implementations, we need an alignment to avoid a realignment
+ * which involves memcpy(). The alignment to 8 bytes should satisfy all crypto
+ * implementations.
+ */
+struct lrng_pool {
+ u8 aux_pool[LRNG_POOL_SIZE]; /* Aux pool: digest state */
+ atomic_t aux_entropy_bits;
+ atomic_t digestsize; /* Digest size of used hash */
+ bool initialized; /* Aux pool initialized? */
+
+ /* Serialize read of entropy pool and update of aux pool */
+ spinlock_t lock;
+};
+
+static struct lrng_pool lrng_pool __aligned(LRNG_KCAPI_ALIGN) = {
+ .aux_entropy_bits = ATOMIC_INIT(0),
+ .digestsize = ATOMIC_INIT(LRNG_ATOMIC_DIGEST_SIZE),
+ .initialized = false,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_pool.lock)
+};
+
+/********************************** Helper ***********************************/
+
+/* Entropy in bits present in aux pool */
+u32 lrng_avail_aux_entropy(void)
+{
+ /* Cap available entropy with max entropy */
+ u32 avail_bits = min_t(u32, lrng_get_digestsize(),
+ atomic_read_u32(&lrng_pool.aux_entropy_bits));
+
+ /* Consider oversampling rate due to aux pool conditioning */
+ return lrng_reduce_by_osr(avail_bits);
+}
+
+/* Set the digest size of the used hash in bytes */
+static inline void lrng_set_digestsize(u32 digestsize)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ u32 ent_bits = atomic_xchg_relaxed(&pool->aux_entropy_bits, 0),
+ old_digestsize = lrng_get_digestsize();
+
+ atomic_set(&lrng_pool.digestsize, digestsize);
+
+ /*
+ * Update the /proc/.../write_wakeup_threshold which must not be larger
+ * than the digest size of the curent conditioning hash.
+ */
+ digestsize <<= 3;
+ lrng_proc_update_max_write_thresh(digestsize);
+ if (lrng_write_wakeup_bits > digestsize)
+ lrng_write_wakeup_bits = digestsize;
+
+ /*
+ * In case the new digest is larger than the old one, cap the available
+ * entropy to the old message digest used to process the existing data.
+ */
+ ent_bits = min_t(u32, ent_bits, old_digestsize);
+ atomic_add(ent_bits, &pool->aux_entropy_bits);
+}
+
+/* Obtain the digest size provided by the used hash in bits */
+u32 lrng_get_digestsize(void)
+{
+ return atomic_read_u32(&lrng_pool.digestsize) << 3;
+}
+
+/* Set entropy content in user-space controllable aux pool */
+void lrng_pool_set_entropy(u32 entropy_bits)
+{
+ atomic_set(&lrng_pool.aux_entropy_bits, entropy_bits);
+}
+
+/*
+ * Replace old with new hash for auxiliary pool handling
+ *
+ * Assumption: the caller must guarantee that the new_cb is available during the
+ * entire operation (e.g. it must hold the write lock against pointer updating).
+ */
+int lrng_aux_switch_hash(const struct lrng_crypto_cb *new_cb, void *new_hash,
+ const struct lrng_crypto_cb *old_cb)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ struct shash_desc *shash = (struct shash_desc *)pool->aux_pool;
+ u8 digest[LRNG_MAX_DIGESTSIZE];
+ int ret;
+
+ if (!IS_ENABLED(CONFIG_LRNG_DRNG_SWITCH))
+ return -EOPNOTSUPP;
+
+ if (unlikely(!pool->initialized))
+ return 0;
+
+ /* Get the aux pool hash with old digest ... */
+ ret = old_cb->lrng_hash_final(shash, digest) ?:
+ /* ... re-initialize the hash with the new digest ... */
+ new_cb->lrng_hash_init(shash, new_hash) ?:
+ /*
+ * ... feed the old hash into the new state. We may feed
+ * uninitialized memory into the new state, but this is
+ * considered no issue and even good as we have some more
+ * uncertainty here.
+ */
+ new_cb->lrng_hash_update(shash, digest, sizeof(digest));
+ if (!ret) {
+ lrng_set_digestsize(new_cb->lrng_hash_digestsize(new_hash));
+ pr_debug("Re-initialize aux entropy pool with hash %s\n",
+ new_cb->lrng_hash_name());
+ }
+
+ memzero_explicit(digest, sizeof(digest));
+ return ret;
+}
+
+/* Insert data into auxiliary pool by using the hash update function. */
+static int
+lrng_pool_insert_aux_locked(const u8 *inbuf, u32 inbuflen, u32 entropy_bits)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ struct shash_desc *shash = (struct shash_desc *)pool->aux_pool;
+ struct lrng_drng *drng = lrng_drng_init_instance();
+ const struct lrng_crypto_cb *crypto_cb;
+ unsigned long flags;
+ void *hash;
+ int ret;
+
+ entropy_bits = min_t(u32, entropy_bits, inbuflen << 3);
+
+ lrng_hash_lock(drng, &flags);
+
+ crypto_cb = drng->crypto_cb;
+ hash = drng->hash;
+
+ if (unlikely(!pool->initialized)) {
+ ret = crypto_cb->lrng_hash_init(shash, hash);
+ if (ret)
+ goto out;
+ pool->initialized = true;
+ }
+
+ ret = crypto_cb->lrng_hash_update(shash, inbuf, inbuflen);
+ if (ret)
+ goto out;
+
+ /*
+ * Cap the available entropy to the hash output size compliant to
+ * SP800-90B section 3.1.5.1 table 1.
+ */
+ entropy_bits += atomic_read_u32(&pool->aux_entropy_bits);
+ atomic_set(&pool->aux_entropy_bits,
+ min_t(u32, entropy_bits,
+ crypto_cb->lrng_hash_digestsize(hash) << 3));
+
+out:
+ lrng_hash_unlock(drng, flags);
+ return ret;
+}
+
+int lrng_pool_insert_aux(const u8 *inbuf, u32 inbuflen, u32 entropy_bits)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&pool->lock, flags);
+ ret = lrng_pool_insert_aux_locked(inbuf, inbuflen, entropy_bits);
+ spin_unlock_irqrestore(&pool->lock, flags);
+
+ lrng_pool_add_entropy();
+
+ return ret;
+}
+
+/************************* Get data from entropy pool *************************/
+
+/*
+ * Get auxiliary entropy pool and its entropy content for seed buffer.
+ * Caller must hold lrng_pool.pool->lock.
+ * @outbuf: buffer to store data in with size requested_bits
+ * @requested_bits: Requested amount of entropy
+ * @return: amount of entropy in outbuf in bits.
+ */
+static inline u32 lrng_get_aux_pool(u8 *outbuf, u32 requested_bits)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ struct shash_desc *shash = (struct shash_desc *)pool->aux_pool;
+ struct lrng_drng *drng = lrng_drng_init_instance();
+ const struct lrng_crypto_cb *crypto_cb;
+ unsigned long flags;
+ void *hash;
+ u32 collected_ent_bits, returned_ent_bits, unused_bits = 0,
+ digestsize;
+ u8 aux_output[LRNG_MAX_DIGESTSIZE];
+
+ if (unlikely(!pool->initialized))
+ return 0;
+
+ lrng_hash_lock(drng, &flags);
+
+ crypto_cb = drng->crypto_cb;
+ hash = drng->hash;
+ digestsize = crypto_cb->lrng_hash_digestsize(hash);
+
+ /* Ensure that no more than the size of aux_pool can be requested */
+ requested_bits = min_t(u32, requested_bits, (LRNG_MAX_DIGESTSIZE << 3));
+
+ /* Cap entropy with entropy counter from aux pool and the used digest */
+ collected_ent_bits = min_t(u32, digestsize << 3,
+ atomic_xchg_relaxed(&pool->aux_entropy_bits, 0));
+
+ /* We collected too much entropy and put the overflow back */
+ if (collected_ent_bits > (requested_bits + lrng_compress_osr())) {
+ /* Amount of bits we collected too much */
+ unused_bits = collected_ent_bits - requested_bits;
+ /* Put entropy back */
+ atomic_add(unused_bits, &pool->aux_entropy_bits);
+ /* Fix collected entropy */
+ collected_ent_bits = requested_bits;
+ }
+
+ /* Apply oversampling: discount requested oversampling rate */
+ returned_ent_bits = lrng_reduce_by_osr(collected_ent_bits);
+
+ pr_debug("obtained %u bits by collecting %u bits of entropy from aux pool, %u bits of entropy remaining\n",
+ returned_ent_bits, collected_ent_bits, unused_bits);
+
+ /* Get the digest for the aux pool to be returned to the caller ... */
+ if (crypto_cb->lrng_hash_final(shash, aux_output) ||
+ /*
+ * ... and re-initialize the aux state. Do not add the aux pool
+ * digest for backward secrecy as it will be added with the
+ * insertion of the complete seed buffer after it has been filled.
+ */
+ crypto_cb->lrng_hash_init(shash, hash)) {
+ returned_ent_bits = 0;
+ } else {
+ /*
+ * Do not truncate the output size exactly to collected_ent_bits
+ * as the aux pool may contain data that is not credited with
+ * entropy, but we want to use them to stir the DRNG state.
+ */
+ memcpy(outbuf, aux_output, requested_bits >> 3);
+ }
+
+ lrng_hash_unlock(drng, flags);
+ memzero_explicit(aux_output, digestsize);
+ return returned_ent_bits;
+}
+
+void lrng_get_backtrack_aux(struct entropy_buf *entropy_buf, u32 requested_bits)
+{
+ struct lrng_pool *pool = &lrng_pool;
+ unsigned long flags;
+
+ /* Ensure aux pool extraction and backtracking op are atomic */
+ spin_lock_irqsave(&pool->lock, flags);
+
+ entropy_buf->a_bits = lrng_get_aux_pool(entropy_buf->a, requested_bits);
+
+ /* Mix the extracted data back into pool for backtracking resistance */
+ if (lrng_pool_insert_aux_locked((u8 *)entropy_buf,
+ sizeof(struct entropy_buf), 0))
+ pr_warn("Backtracking resistance operation failed\n");
+
+ spin_unlock_irqrestore(&pool->lock, flags);
+}
+
+void lrng_aux_es_state(unsigned char *buf, size_t buflen)
+{
+ const struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+
+ /* Assume the lrng_drng_init lock is taken by caller */
+ snprintf(buf, buflen,
+ "Auxiliary ES properties:\n"
+ " Hash for operating entropy pool: %s\n",
+ lrng_drng_init->crypto_cb->lrng_hash_name());
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_es_irq.c linux-5.15-lrng/drivers/char/lrng/lrng_es_irq.c
--- linux-5.15/drivers/char/lrng/lrng_es_irq.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_irq.c 2021-11-29 12:36:57.763279152 +1100
@@ -0,0 +1,823 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG Slow Entropy Source: Interrupt data collection
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/irq_regs.h>
+#include <asm/ptrace.h>
+#include <crypto/hash.h>
+#include <linux/gcd.h>
+#include <linux/lrng.h>
+#include <linux/random.h>
+
+#include "lrng_internal.h"
+#include "lrng_es_irq.h"
+
+/*
+ * Number of interrupts to be recorded to assume that DRNG security strength
+ * bits of entropy are received.
+ * Note: a value below the DRNG security strength should not be defined as this
+ * may imply the DRNG can never be fully seeded in case other noise
+ * sources are unavailable.
+ */
+#define LRNG_IRQ_ENTROPY_BITS CONFIG_LRNG_IRQ_ENTROPY_RATE
+
+
+/* Number of interrupts required for LRNG_DRNG_SECURITY_STRENGTH_BITS entropy */
+static u32 lrng_irq_entropy_bits = LRNG_IRQ_ENTROPY_BITS;
+/* Is high-resolution timer present? */
+static bool lrng_irq_highres_timer = false;
+
+static u32 irq_entropy __read_mostly = LRNG_IRQ_ENTROPY_BITS;
+#ifdef CONFIG_LRNG_RUNTIME_ES_CONFIG
+module_param(irq_entropy, uint, 0444);
+MODULE_PARM_DESC(irq_entropy,
+ "How many interrupts must be collected for obtaining 256 bits of entropy\n");
+#endif
+
+/* Per-CPU array holding concatenated entropy events */
+static DEFINE_PER_CPU(u32 [LRNG_DATA_ARRAY_SIZE], lrng_pcpu_array)
+ __aligned(LRNG_KCAPI_ALIGN);
+static DEFINE_PER_CPU(u32, lrng_pcpu_array_ptr) = 0;
+static DEFINE_PER_CPU(atomic_t, lrng_pcpu_array_irqs) = ATOMIC_INIT(0);
+
+/*
+ * The entropy collection is performed by executing the following steps:
+ * 1. fill up the per-CPU array holding the time stamps
+ * 2. once the per-CPU array is full, a compression of the data into
+ * the entropy pool is performed - this happens in interrupt context
+ *
+ * If step 2 is not desired in interrupt context, the following boolean
+ * needs to be set to false. This implies that old entropy data in the
+ * per-CPU array collected since the last DRNG reseed is overwritten with
+ * new entropy data instead of retaining the entropy with the compression
+ * operation.
+ *
+ * Impact on entropy:
+ *
+ * If continuous compression is enabled, the maximum entropy that is collected
+ * per CPU between DRNG reseeds is equal to the digest size of the used hash.
+ *
+ * If continuous compression is disabled, the maximum number of entropy events
+ * that can be collected per CPU is equal to LRNG_DATA_ARRAY_SIZE. This amount
+ * of events is converted into an entropy statement which then represents the
+ * maximum amount of entropy collectible per CPU between DRNG reseeds.
+ */
+static bool lrng_pcpu_continuous_compression __read_mostly =
+ IS_ENABLED(CONFIG_LRNG_ENABLE_CONTINUOUS_COMPRESSION);
+
+#ifdef CONFIG_LRNG_SWITCHABLE_CONTINUOUS_COMPRESSION
+module_param(lrng_pcpu_continuous_compression, bool, 0444);
+MODULE_PARM_DESC(lrng_pcpu_continuous_compression,
+ "Perform entropy compression if per-CPU entropy data array is full\n");
+#endif
+
+/*
+ * Per-CPU entropy pool with compressed entropy event
+ *
+ * The per-CPU entropy pool is defined as the hash state. New data is simply
+ * inserted into the entropy pool by performing a hash update operation.
+ * To read the entropy pool, a hash final must be invoked. However, before
+ * the entropy pool is released again after a hash final, the hash init must
+ * be performed.
+ */
+static DEFINE_PER_CPU(u8 [LRNG_POOL_SIZE], lrng_pcpu_pool)
+ __aligned(LRNG_KCAPI_ALIGN);
+/*
+ * Lock to allow other CPUs to read the pool - as this is only done during
+ * reseed which is infrequent, this lock is hardly contended.
+ */
+static DEFINE_PER_CPU(spinlock_t, lrng_pcpu_lock);
+static DEFINE_PER_CPU(bool, lrng_pcpu_lock_init) = false;
+
+/* Number of time stamps analyzed to calculate a GCD */
+#define LRNG_GCD_WINDOW_SIZE 100
+static u32 lrng_gcd_history[LRNG_GCD_WINDOW_SIZE];
+static atomic_t lrng_gcd_history_ptr = ATOMIC_INIT(-1);
+
+/* The common divisor for all timestamps */
+static u32 lrng_gcd_timer = 0;
+
+static inline bool lrng_gcd_tested(void)
+{
+ return (lrng_gcd_timer != 0);
+}
+
+/* Set the GCD for use in IRQ ES - if 0, the GCD calculation is restarted. */
+static inline void _lrng_gcd_set(u32 running_gcd)
+{
+ lrng_gcd_timer = running_gcd;
+ mb();
+}
+
+static void lrng_gcd_set(u32 running_gcd)
+{
+ if (!lrng_gcd_tested()) {
+ _lrng_gcd_set(running_gcd);
+ pr_debug("Setting GCD to %u\n", running_gcd);
+ }
+}
+
+u32 lrng_gcd_analyze(u32 *history, size_t nelem)
+{
+ u32 running_gcd = 0;
+ size_t i;
+
+ /* Now perform the analysis on the accumulated time data. */
+ for (i = 0; i < nelem; i++) {
+ /*
+ * NOTE: this would be the place to add more analysis on the
+ * appropriateness of the timer like checking the presence
+ * of sufficient variations in the timer.
+ */
+
+ /*
+ * This calculates the gcd of all the time values. that is
+ * gcd(time_1, time_2, ..., time_nelem)
+ *
+ * Some timers increment by a fixed (non-1) amount each step.
+ * This code checks for such increments, and allows the library
+ * to output the number of such changes have occurred.
+ */
+ running_gcd = (u32)gcd(history[i], running_gcd);
+
+ /* Zeroize data */
+ history[i] = 0;
+ }
+
+ return running_gcd;
+}
+
+static void lrng_gcd_add_value(u32 time)
+{
+ u32 ptr = (u32)atomic_inc_return_relaxed(&lrng_gcd_history_ptr);
+
+ if (ptr < LRNG_GCD_WINDOW_SIZE) {
+ lrng_gcd_history[ptr] = time;
+ } else if (ptr == LRNG_GCD_WINDOW_SIZE) {
+ u32 gcd = lrng_gcd_analyze(lrng_gcd_history,
+ LRNG_GCD_WINDOW_SIZE);
+
+ if (!gcd)
+ gcd = 1;
+
+ /*
+ * Ensure that we have variations in the time stamp below the
+ * given value. This is just a safety measure to prevent the GCD
+ * becoming too large.
+ */
+ if (gcd >= 1000) {
+ pr_warn("calculated GCD is larger than expected: %u\n",
+ gcd);
+ gcd = 1000;
+ }
+
+ /* Adjust all deltas by the observed (small) common factor. */
+ lrng_gcd_set(gcd);
+ atomic_set(&lrng_gcd_history_ptr, 0);
+ }
+}
+
+/* Return boolean whether LRNG identified presence of high-resolution timer */
+static bool lrng_pool_highres_timer(void)
+{
+ return lrng_irq_highres_timer;
+}
+
+/* Convert entropy in bits into number of IRQs with the same entropy content. */
+static inline u32 lrng_entropy_to_data(u32 entropy_bits)
+{
+ return ((entropy_bits * lrng_irq_entropy_bits) /
+ LRNG_DRNG_SECURITY_STRENGTH_BITS);
+}
+
+/* Convert number of IRQs into entropy value. */
+static inline u32 lrng_data_to_entropy(u32 irqnum)
+{
+ return ((irqnum * LRNG_DRNG_SECURITY_STRENGTH_BITS) /
+ lrng_irq_entropy_bits);
+}
+
+static inline bool lrng_pcpu_pool_online(int cpu)
+{
+ return per_cpu(lrng_pcpu_lock_init, cpu);
+}
+
+static void lrng_pcpu_check_compression_state(void)
+{
+ /* One pool must hold sufficient entropy for disabled compression */
+ if (!lrng_pcpu_continuous_compression) {
+ u32 max_ent = min_t(u32, lrng_get_digestsize(),
+ lrng_data_to_entropy(LRNG_DATA_NUM_VALUES));
+ if (max_ent < lrng_security_strength()) {
+ pr_warn("Force continuous compression operation to ensure LRNG can hold enough entropy\n");
+ lrng_pcpu_continuous_compression = true;
+ }
+ }
+}
+
+static int __init lrng_init_time_source(void)
+{
+ /* Set a minimum number of interrupts that must be collected */
+ irq_entropy = max_t(u32, LRNG_IRQ_ENTROPY_BITS, irq_entropy);
+
+ if ((random_get_entropy() & LRNG_DATA_SLOTSIZE_MASK) ||
+ (random_get_entropy() & LRNG_DATA_SLOTSIZE_MASK)) {
+ /*
+ * As the highres timer is identified here, previous interrupts
+ * obtained during boot time are treated like a lowres-timer
+ * would have been present.
+ */
+ lrng_irq_highres_timer = true;
+ lrng_irq_entropy_bits = irq_entropy;
+ } else {
+ u32 new_entropy = irq_entropy * LRNG_IRQ_OVERSAMPLING_FACTOR;
+
+ lrng_health_disable();
+ lrng_irq_highres_timer = false;
+ lrng_irq_entropy_bits = (irq_entropy < new_entropy) ?
+ new_entropy : irq_entropy;
+ pr_warn("operating without high-resolution timer and applying IRQ oversampling factor %u\n",
+ LRNG_IRQ_OVERSAMPLING_FACTOR);
+ lrng_pcpu_check_compression_state();
+ }
+ mb();
+
+ return 0;
+}
+core_initcall(lrng_init_time_source);
+
+/*
+ * Reset all per-CPU pools - reset entropy estimator but leave the pool data
+ * that may or may not have entropy unchanged.
+ */
+void lrng_pcpu_reset(void)
+{
+ int cpu;
+
+ /* Trigger GCD calculation anew. */
+ _lrng_gcd_set(0);
+
+ for_each_online_cpu(cpu)
+ atomic_set(per_cpu_ptr(&lrng_pcpu_array_irqs, cpu), 0);
+}
+
+u32 lrng_pcpu_avail_pool_size(void)
+{
+ u32 max_size = 0, max_pool = lrng_get_digestsize();
+ int cpu;
+
+ if (!lrng_pcpu_continuous_compression)
+ max_pool = min_t(u32, max_pool, LRNG_DATA_NUM_VALUES);
+
+ for_each_online_cpu(cpu) {
+ if (lrng_pcpu_pool_online(cpu))
+ max_size += max_pool;
+ }
+
+ return max_size;
+}
+
+/* Return entropy of unused IRQs present in all per-CPU pools. */
+u32 lrng_pcpu_avail_entropy(void)
+{
+ u32 digestsize_irqs, irq = 0;
+ int cpu;
+
+ /* Obtain the cap of maximum numbers of IRQs we count */
+ digestsize_irqs = lrng_entropy_to_data(lrng_get_digestsize());
+ if (!lrng_pcpu_continuous_compression) {
+ /* Cap to max. number of IRQs the array can hold */
+ digestsize_irqs = min_t(u32, digestsize_irqs,
+ LRNG_DATA_NUM_VALUES);
+ }
+
+ for_each_online_cpu(cpu) {
+ if (!lrng_pcpu_pool_online(cpu))
+ continue;
+ irq += min_t(u32, digestsize_irqs,
+ atomic_read_u32(per_cpu_ptr(&lrng_pcpu_array_irqs,
+ cpu)));
+ }
+
+ /* Consider oversampling rate */
+ return lrng_reduce_by_osr(lrng_data_to_entropy(irq));
+}
+
+/*
+ * Trigger a switch of the hash implementation for the per-CPU pool.
+ *
+ * For each per-CPU pool, obtain the message digest with the old hash
+ * implementation, initialize the per-CPU pool again with the new hash
+ * implementation and inject the message digest into the new state.
+ *
+ * Assumption: the caller must guarantee that the new_cb is available during the
+ * entire operation (e.g. it must hold the lock against pointer updating).
+ */
+int lrng_pcpu_switch_hash(int node,
+ const struct lrng_crypto_cb *new_cb, void *new_hash,
+ const struct lrng_crypto_cb *old_cb)
+{
+ u8 digest[LRNG_MAX_DIGESTSIZE];
+ u32 digestsize_irqs, found_irqs;
+ int ret = 0, cpu;
+
+ if (!IS_ENABLED(CONFIG_LRNG_DRNG_SWITCH))
+ return -EOPNOTSUPP;
+
+ for_each_online_cpu(cpu) {
+ struct shash_desc *pcpu_shash;
+
+ /*
+ * Only switch the per-CPU pools for the current node because
+ * the crypto_cb only applies NUMA-node-wide.
+ */
+ if (cpu_to_node(cpu) != node || !lrng_pcpu_pool_online(cpu))
+ continue;
+
+ pcpu_shash = (struct shash_desc *)per_cpu_ptr(lrng_pcpu_pool,
+ cpu);
+
+ digestsize_irqs = old_cb->lrng_hash_digestsize(pcpu_shash);
+ digestsize_irqs = lrng_entropy_to_data(digestsize_irqs << 3);
+
+ if (pcpu_shash->tfm == new_hash)
+ continue;
+
+ /* Get the per-CPU pool hash with old digest ... */
+ ret = old_cb->lrng_hash_final(pcpu_shash, digest) ?:
+ /* ... re-initialize the hash with the new digest ... */
+ new_cb->lrng_hash_init(pcpu_shash, new_hash) ?:
+ /*
+ * ... feed the old hash into the new state. We may feed
+ * uninitialized memory into the new state, but this is
+ * considered no issue and even good as we have some more
+ * uncertainty here.
+ */
+ new_cb->lrng_hash_update(pcpu_shash, digest,
+ sizeof(digest));
+ if (ret)
+ goto out;
+
+ /*
+ * In case the new digest is larger than the old one, cap
+ * the available entropy to the old message digest used to
+ * process the existing data.
+ */
+ found_irqs = atomic_xchg_relaxed(
+ per_cpu_ptr(&lrng_pcpu_array_irqs, cpu), 0);
+ found_irqs = min_t(u32, found_irqs, digestsize_irqs);
+ atomic_add_return_relaxed(found_irqs,
+ per_cpu_ptr(&lrng_pcpu_array_irqs, cpu));
+
+ pr_debug("Re-initialize per-CPU entropy pool for CPU %d on NUMA node %d with hash %s\n",
+ cpu, node, new_cb->lrng_hash_name());
+ }
+
+out:
+ memzero_explicit(digest, sizeof(digest));
+ return ret;
+}
+
+/*
+ * When reading the per-CPU message digest, make sure we use the crypto
+ * callbacks defined for the NUMA node the per-CPU pool is defined for because
+ * the LRNG crypto switch support is only atomic per NUMA node.
+ */
+static inline u32
+lrng_pcpu_pool_hash_one(const struct lrng_crypto_cb *pcpu_crypto_cb,
+ void *pcpu_hash, int cpu, u8 *digest, u32 *digestsize)
+{
+ struct shash_desc *pcpu_shash =
+ (struct shash_desc *)per_cpu_ptr(lrng_pcpu_pool, cpu);
+ spinlock_t *lock = per_cpu_ptr(&lrng_pcpu_lock, cpu);
+ unsigned long flags;
+ u32 digestsize_irqs, found_irqs;
+
+ /* Lock guarding against reading / writing to per-CPU pool */
+ spin_lock_irqsave(lock, flags);
+
+ *digestsize = pcpu_crypto_cb->lrng_hash_digestsize(pcpu_hash);
+ digestsize_irqs = lrng_entropy_to_data(*digestsize << 3);
+
+ /* Obtain entropy statement like for the entropy pool */
+ found_irqs = atomic_xchg_relaxed(
+ per_cpu_ptr(&lrng_pcpu_array_irqs, cpu), 0);
+ /* Cap to maximum amount of data we can hold in hash */
+ found_irqs = min_t(u32, found_irqs, digestsize_irqs);
+
+ /* Cap to maximum amount of data we can hold in array */
+ if (!lrng_pcpu_continuous_compression)
+ found_irqs = min_t(u32, found_irqs, LRNG_DATA_NUM_VALUES);
+
+ /* Store all not-yet compressed data in data array into hash, ... */
+ if (pcpu_crypto_cb->lrng_hash_update(pcpu_shash,
+ (u8 *)per_cpu_ptr(lrng_pcpu_array, cpu),
+ LRNG_DATA_ARRAY_SIZE * sizeof(u32)) ?:
+ /* ... get the per-CPU pool digest, ... */
+ pcpu_crypto_cb->lrng_hash_final(pcpu_shash, digest) ?:
+ /* ... re-initialize the hash, ... */
+ pcpu_crypto_cb->lrng_hash_init(pcpu_shash, pcpu_hash) ?:
+ /* ... feed the old hash into the new state. */
+ pcpu_crypto_cb->lrng_hash_update(pcpu_shash, digest, *digestsize))
+ found_irqs = 0;
+
+ spin_unlock_irqrestore(lock, flags);
+ return found_irqs;
+}
+
+/*
+ * Hash all per-CPU pools and return the digest to be used as seed data for
+ * seeding a DRNG. The caller must guarantee backtracking resistance.
+ * The function will only copy as much data as entropy is available into the
+ * caller-provided output buffer.
+ *
+ * This function handles the translation from the number of received interrupts
+ * into an entropy statement. The conversion depends on LRNG_IRQ_ENTROPY_BITS
+ * which defines how many interrupts must be received to obtain 256 bits of
+ * entropy. With this value, the function lrng_data_to_entropy converts a given
+ * data size (received interrupts, requested amount of data, etc.) into an
+ * entropy statement. lrng_entropy_to_data does the reverse.
+ *
+ * @outbuf: buffer to store data in with size requested_bits
+ * @requested_bits: Requested amount of entropy
+ * @fully_seeded: indicator whether LRNG is fully seeded
+ * @return: amount of entropy in outbuf in bits.
+ */
+u32 lrng_pcpu_pool_hash(u8 *outbuf, u32 requested_bits, bool fully_seeded)
+{
+ SHASH_DESC_ON_STACK(shash, NULL);
+ const struct lrng_crypto_cb *crypto_cb;
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ struct lrng_drng *drng = lrng_drng_init_instance();
+ u8 digest[LRNG_MAX_DIGESTSIZE];
+ unsigned long flags, flags2;
+ u32 found_irqs, collected_irqs = 0, collected_ent_bits, requested_irqs,
+ returned_ent_bits;
+ int ret, cpu;
+ void *hash;
+
+ /* Lock guarding replacement of per-NUMA hash */
+ lrng_hash_lock(drng, &flags);
+
+ crypto_cb = drng->crypto_cb;
+ hash = drng->hash;
+
+ /* The hash state of filled with all per-CPU pool hashes. */
+ ret = crypto_cb->lrng_hash_init(shash, hash);
+ if (ret)
+ goto err;
+
+ requested_irqs = lrng_entropy_to_data(requested_bits +
+ lrng_compress_osr());
+
+ /*
+ * Harvest entropy from each per-CPU hash state - even though we may
+ * have collected sufficient entropy, we will hash all per-CPU pools.
+ */
+ for_each_online_cpu(cpu) {
+ struct lrng_drng *pcpu_drng = drng;
+ u32 digestsize, pcpu_unused_irqs = 0;
+ int node = cpu_to_node(cpu);
+
+ /* If pool is not online, then no entropy is present. */
+ if (!lrng_pcpu_pool_online(cpu))
+ continue;
+
+ if (lrng_drng && lrng_drng[node])
+ pcpu_drng = lrng_drng[node];
+
+ if (pcpu_drng == drng) {
+ found_irqs = lrng_pcpu_pool_hash_one(crypto_cb, hash,
+ cpu, digest,
+ &digestsize);
+ } else {
+ lrng_hash_lock(pcpu_drng, &flags2);
+ found_irqs =
+ lrng_pcpu_pool_hash_one(pcpu_drng->crypto_cb,
+ pcpu_drng->hash, cpu,
+ digest, &digestsize);
+ lrng_hash_unlock(pcpu_drng, flags2);
+ }
+
+ /* Inject the digest into the state of all per-CPU pools */
+ ret = crypto_cb->lrng_hash_update(shash, digest, digestsize);
+ if (ret)
+ goto err;
+
+ collected_irqs += found_irqs;
+ if (collected_irqs > requested_irqs) {
+ pcpu_unused_irqs = collected_irqs - requested_irqs;
+ atomic_add_return_relaxed(pcpu_unused_irqs,
+ per_cpu_ptr(&lrng_pcpu_array_irqs, cpu));
+ collected_irqs = requested_irqs;
+ }
+ pr_debug("%u interrupts used from entropy pool of CPU %d, %u interrupts remain unused\n",
+ found_irqs - pcpu_unused_irqs, cpu, pcpu_unused_irqs);
+ }
+
+ ret = crypto_cb->lrng_hash_final(shash, digest);
+ if (ret)
+ goto err;
+
+ collected_ent_bits = lrng_data_to_entropy(collected_irqs);
+ /* Cap to maximum entropy that can ever be generated with given hash */
+ collected_ent_bits = min_t(u32, collected_ent_bits,
+ crypto_cb->lrng_hash_digestsize(hash) << 3);
+ /* Apply oversampling: discount requested oversampling rate */
+ returned_ent_bits = lrng_reduce_by_osr(collected_ent_bits);
+
+ pr_debug("obtained %u bits by collecting %u bits of entropy from entropy pool noise source\n",
+ returned_ent_bits, collected_ent_bits);
+
+ /*
+ * Truncate to available entropy as implicitly allowed by SP800-90B
+ * section 3.1.5.1.1 table 1 which awards truncated hashes full
+ * entropy.
+ *
+ * During boot time, we read requested_bits data with
+ * returned_ent_bits entropy. In case our conservative entropy
+ * estimate underestimates the available entropy we can transport as
+ * much available entropy as possible.
+ */
+ memcpy(outbuf, digest, fully_seeded ? returned_ent_bits >> 3 :
+ requested_bits >> 3);
+
+out:
+ crypto_cb->lrng_hash_desc_zero(shash);
+ lrng_hash_unlock(drng, flags);
+ memzero_explicit(digest, sizeof(digest));
+ return returned_ent_bits;
+
+err:
+ returned_ent_bits = 0;
+ goto out;
+}
+
+/* Compress the lrng_pcpu_array array into lrng_pcpu_pool */
+static inline void lrng_pcpu_array_compress(void)
+{
+ struct shash_desc *shash =
+ (struct shash_desc *)this_cpu_ptr(lrng_pcpu_pool);
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ struct lrng_drng *drng = lrng_drng_init_instance();
+ const struct lrng_crypto_cb *crypto_cb;
+ spinlock_t *lock = this_cpu_ptr(&lrng_pcpu_lock);
+ unsigned long flags, flags2;
+ int node = numa_node_id();
+ void *hash;
+ bool init = false;
+
+ /* Get NUMA-node local hash instance */
+ if (lrng_drng && lrng_drng[node])
+ drng = lrng_drng[node];
+
+ lrng_hash_lock(drng, &flags);
+ crypto_cb = drng->crypto_cb;
+ hash = drng->hash;
+
+ if (unlikely(!this_cpu_read(lrng_pcpu_lock_init))) {
+ init = true;
+ spin_lock_init(lock);
+ this_cpu_write(lrng_pcpu_lock_init, true);
+ pr_debug("Initializing per-CPU entropy pool for CPU %d on NUMA node %d with hash %s\n",
+ raw_smp_processor_id(), node,
+ crypto_cb->lrng_hash_name());
+ }
+
+ spin_lock_irqsave(lock, flags2);
+
+ if (unlikely(init) && crypto_cb->lrng_hash_init(shash, hash)) {
+ this_cpu_write(lrng_pcpu_lock_init, false);
+ pr_warn("Initialization of hash failed\n");
+ } else if (lrng_pcpu_continuous_compression) {
+ /* Add entire per-CPU data array content into entropy pool. */
+ if (crypto_cb->lrng_hash_update(shash,
+ (u8 *)this_cpu_ptr(lrng_pcpu_array),
+ LRNG_DATA_ARRAY_SIZE * sizeof(u32)))
+ pr_warn_ratelimited("Hashing of entropy data failed\n");
+ }
+
+ spin_unlock_irqrestore(lock, flags2);
+ lrng_hash_unlock(drng, flags);
+}
+
+/* Compress data array into hash */
+static inline void lrng_pcpu_array_to_hash(u32 ptr)
+{
+ u32 *array = this_cpu_ptr(lrng_pcpu_array);
+
+ /*
+ * During boot time the hash operation is triggered more often than
+ * during regular operation.
+ */
+ if (unlikely(!lrng_state_fully_seeded())) {
+ if ((ptr & 31) && (ptr < LRNG_DATA_WORD_MASK))
+ return;
+ } else if (ptr < LRNG_DATA_WORD_MASK) {
+ return;
+ }
+
+ if (lrng_raw_array_entropy_store(*array)) {
+ u32 i;
+
+ /*
+ * If we fed even a part of the array to external analysis, we
+ * mark that the entire array and the per-CPU pool to have no
+ * entropy. This is due to the non-IID property of the data as
+ * we do not fully know whether the existing dependencies
+ * diminish the entropy beyond to what we expect it has.
+ */
+ atomic_set(this_cpu_ptr(&lrng_pcpu_array_irqs), 0);
+
+ for (i = 1; i < LRNG_DATA_ARRAY_SIZE; i++)
+ lrng_raw_array_entropy_store(*(array + i));
+ } else {
+ lrng_pcpu_array_compress();
+ /* Ping pool handler about received entropy */
+ lrng_pool_add_entropy();
+ }
+}
+
+/*
+ * Concatenate full 32 bit word at the end of time array even when current
+ * ptr is not aligned to sizeof(data).
+ */
+static inline void _lrng_pcpu_array_add_u32(u32 data)
+{
+ /* Increment pointer by number of slots taken for input value */
+ u32 pre_ptr, mask, ptr = this_cpu_add_return(lrng_pcpu_array_ptr,
+ LRNG_DATA_SLOTS_PER_UINT);
+ unsigned int pre_array;
+
+ /*
+ * This function injects a unit into the array - guarantee that
+ * array unit size is equal to data type of input data.
+ */
+ BUILD_BUG_ON(LRNG_DATA_ARRAY_MEMBER_BITS != (sizeof(data) << 3));
+
+ /*
+ * The following logic requires at least two units holding
+ * the data as otherwise the pointer would immediately wrap when
+ * injection an u32 word.
+ */
+ BUILD_BUG_ON(LRNG_DATA_NUM_VALUES <= LRNG_DATA_SLOTS_PER_UINT);
+
+ lrng_pcpu_split_u32(&ptr, &pre_ptr, &mask);
+
+ /* MSB of data go into previous unit */
+ pre_array = lrng_data_idx2array(pre_ptr);
+ /* zeroization of slot to ensure the following OR adds the data */
+ this_cpu_and(lrng_pcpu_array[pre_array], ~(0xffffffff & ~mask));
+ this_cpu_or(lrng_pcpu_array[pre_array], data & ~mask);
+
+ /* Invoke compression as we just filled data array completely */
+ if (unlikely(pre_ptr > ptr))
+ lrng_pcpu_array_to_hash(LRNG_DATA_WORD_MASK);
+
+ /* LSB of data go into current unit */
+ this_cpu_write(lrng_pcpu_array[lrng_data_idx2array(ptr)],
+ data & mask);
+
+ if (likely(pre_ptr <= ptr))
+ lrng_pcpu_array_to_hash(ptr);
+}
+
+/* Concatenate a 32-bit word at the end of the per-CPU array */
+void lrng_pcpu_array_add_u32(u32 data)
+{
+ /*
+ * Disregard entropy-less data without continuous compression to
+ * avoid it overwriting data with entropy when array ptr wraps.
+ */
+ if (lrng_pcpu_continuous_compression)
+ _lrng_pcpu_array_add_u32(data);
+}
+
+/* Concatenate data of max LRNG_DATA_SLOTSIZE_MASK at the end of time array */
+static inline void lrng_pcpu_array_add_slot(u32 data)
+{
+ /* Get slot */
+ u32 ptr = this_cpu_inc_return(lrng_pcpu_array_ptr) &
+ LRNG_DATA_WORD_MASK;
+ unsigned int array = lrng_data_idx2array(ptr);
+ unsigned int slot = lrng_data_idx2slot(ptr);
+
+ BUILD_BUG_ON(LRNG_DATA_ARRAY_MEMBER_BITS % LRNG_DATA_SLOTSIZE_BITS);
+ /* Ensure consistency of values */
+ BUILD_BUG_ON(LRNG_DATA_ARRAY_MEMBER_BITS !=
+ sizeof(lrng_pcpu_array[0]) << 3);
+
+ /* zeroization of slot to ensure the following OR adds the data */
+ this_cpu_and(lrng_pcpu_array[array],
+ ~(lrng_data_slot_val(0xffffffff & LRNG_DATA_SLOTSIZE_MASK,
+ slot)));
+ /* Store data into slot */
+ this_cpu_or(lrng_pcpu_array[array], lrng_data_slot_val(data, slot));
+
+ lrng_pcpu_array_to_hash(ptr);
+}
+
+static inline void
+lrng_time_process_common(u32 time, void(*add_time)(u32 data))
+{
+ enum lrng_health_res health_test;
+
+ if (lrng_raw_hires_entropy_store(time))
+ return;
+
+ health_test = lrng_health_test(time);
+ if (health_test > lrng_health_fail_use)
+ return;
+
+ if (health_test == lrng_health_pass)
+ atomic_inc_return(this_cpu_ptr(&lrng_pcpu_array_irqs));
+
+ add_time(time);
+}
+
+/*
+ * Batching up of entropy in per-CPU array before injecting into entropy pool.
+ */
+static inline void lrng_time_process(void)
+{
+ u32 now_time = random_get_entropy();
+
+ if (unlikely(!lrng_gcd_tested())) {
+ /* When GCD is unknown, we process the full time stamp */
+ lrng_time_process_common(now_time, _lrng_pcpu_array_add_u32);
+ lrng_gcd_add_value(now_time);
+ } else {
+ /* GCD is known and applied */
+ lrng_time_process_common((now_time / lrng_gcd_timer) &
+ LRNG_DATA_SLOTSIZE_MASK,
+ lrng_pcpu_array_add_slot);
+ }
+
+ lrng_perf_time(now_time);
+}
+
+/* Hot code path - Callback for interrupt handler */
+void add_interrupt_randomness(int irq, int irq_flg)
+{
+ if (lrng_pool_highres_timer()) {
+ lrng_time_process();
+ } else {
+ struct pt_regs *regs = get_irq_regs();
+ static atomic_t reg_idx = ATOMIC_INIT(0);
+ u64 ip;
+ u32 tmp;
+
+ if (regs) {
+ u32 *ptr = (u32 *)regs;
+ int reg_ptr = atomic_add_return_relaxed(1, ®_idx);
+ size_t n = (sizeof(struct pt_regs) / sizeof(u32));
+
+ ip = instruction_pointer(regs);
+ tmp = *(ptr + (reg_ptr % n));
+ tmp = lrng_raw_regs_entropy_store(tmp) ? 0 : tmp;
+ _lrng_pcpu_array_add_u32(tmp);
+ } else {
+ ip = _RET_IP_;
+ }
+
+ lrng_time_process();
+
+ /*
+ * The XOR operation combining the different values is not
+ * considered to destroy entropy since the entirety of all
+ * processed values delivers the entropy (and not each
+ * value separately of the other values).
+ */
+ tmp = lrng_raw_jiffies_entropy_store(jiffies) ? 0 : jiffies;
+ tmp ^= lrng_raw_irq_entropy_store(irq) ? 0 : irq;
+ tmp ^= lrng_raw_irqflags_entropy_store(irq_flg) ? 0 : irq_flg;
+ tmp ^= lrng_raw_retip_entropy_store(ip) ? 0 : ip;
+ tmp ^= ip >> 32;
+ _lrng_pcpu_array_add_u32(tmp);
+ }
+}
+EXPORT_SYMBOL(add_interrupt_randomness);
+
+void lrng_irq_es_state(unsigned char *buf, size_t buflen)
+{
+ const struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+
+ /* Assume the lrng_drng_init lock is taken by caller */
+ snprintf(buf, buflen,
+ "IRQ ES properties:\n"
+ " Hash for operating entropy pool: %s\n"
+ " per-CPU interrupt collection size: %u\n"
+ " Standards compliance: %s\n"
+ " High-resolution timer: %s\n"
+ " Continuous compression: %s\n",
+ lrng_drng_init->crypto_cb->lrng_hash_name(),
+ LRNG_DATA_NUM_VALUES,
+ lrng_sp80090b_compliant() ? "SP800-90B " : "",
+ lrng_pool_highres_timer() ? "true" : "false",
+ lrng_pcpu_continuous_compression ? "true" : "false");
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_es_irq.h linux-5.15-lrng/drivers/char/lrng/lrng_es_irq.h
--- linux-5.15/drivers/char/lrng/lrng_es_irq.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_irq.h 2021-11-29 12:36:57.773279152 +1100
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * LRNG Slow Noise Source: Time stamp array handling
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+/*
+ * To limit the impact on the interrupt handling, the LRNG concatenates
+ * entropic LSB parts of the time stamps in a per-CPU array and only
+ * injects them into the entropy pool when the array is full.
+ */
+
+/* Store multiple integers in one u32 */
+#define LRNG_DATA_SLOTSIZE_BITS (8)
+#define LRNG_DATA_SLOTSIZE_MASK ((1 << LRNG_DATA_SLOTSIZE_BITS) - 1)
+#define LRNG_DATA_ARRAY_MEMBER_BITS (4 << 3) /* ((sizeof(u32)) << 3) */
+#define LRNG_DATA_SLOTS_PER_UINT (LRNG_DATA_ARRAY_MEMBER_BITS / \
+ LRNG_DATA_SLOTSIZE_BITS)
+
+/*
+ * Number of time values to store in the array - in small environments
+ * only one atomic_t variable per CPU is used.
+ */
+#define LRNG_DATA_NUM_VALUES (CONFIG_LRNG_COLLECTION_SIZE)
+/* Mask of LSB of time stamp to store */
+#define LRNG_DATA_WORD_MASK (LRNG_DATA_NUM_VALUES - 1)
+
+#define LRNG_DATA_SLOTS_MASK (LRNG_DATA_SLOTS_PER_UINT - 1)
+#define LRNG_DATA_ARRAY_SIZE (LRNG_DATA_NUM_VALUES / \
+ LRNG_DATA_SLOTS_PER_UINT)
+
+/* Starting bit index of slot */
+static inline unsigned int lrng_data_slot2bitindex(unsigned int slot)
+{
+ return (LRNG_DATA_SLOTSIZE_BITS * slot);
+}
+
+/* Convert index into the array index */
+static inline unsigned int lrng_data_idx2array(unsigned int idx)
+{
+ return idx / LRNG_DATA_SLOTS_PER_UINT;
+}
+
+/* Convert index into the slot of a given array index */
+static inline unsigned int lrng_data_idx2slot(unsigned int idx)
+{
+ return idx & LRNG_DATA_SLOTS_MASK;
+}
+
+/* Convert value into slot value */
+static inline unsigned int lrng_data_slot_val(unsigned int val,
+ unsigned int slot)
+{
+ return val << lrng_data_slot2bitindex(slot);
+}
+
+/*
+ * Return the pointers for the previous and current units to inject a u32 into.
+ * Also return the mask which the u32 word is to be processed.
+ */
+static inline void lrng_pcpu_split_u32(u32 *ptr, u32 *pre_ptr, u32 *mask)
+{
+ /* ptr to previous unit */
+ *pre_ptr = (*ptr - LRNG_DATA_SLOTS_PER_UINT) & LRNG_DATA_WORD_MASK;
+ *ptr &= LRNG_DATA_WORD_MASK;
+
+ /* mask to split data into the two parts for the two units */
+ *mask = ((1 << (*pre_ptr & (LRNG_DATA_SLOTS_PER_UINT - 1)) *
+ LRNG_DATA_SLOTSIZE_BITS)) - 1;
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_es_jent.c linux-5.15-lrng/drivers/char/lrng/lrng_es_jent.c
--- linux-5.15/drivers/char/lrng/lrng_es_jent.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_jent.c 2021-11-29 12:38:04.443278898 +1100
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG Fast Entropy Source: Jitter RNG
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/types.h>
+#include <crypto/internal/jitterentropy.h>
+
+#include "lrng_internal.h"
+
+/*
+ * Estimated entropy of data is a 16th of LRNG_DRNG_SECURITY_STRENGTH_BITS.
+ * Albeit a full entropy assessment is provided for the noise source indicating
+ * that it provides high entropy rates and considering that it deactivates
+ * when it detects insufficient hardware, the chosen under estimation of
+ * entropy is considered to be acceptable to all reviewers.
+ */
+static u32 jitterrng = CONFIG_LRNG_JENT_ENTROPY_RATE;
+#ifdef CONFIG_LRNG_RUNTIME_ES_CONFIG
+module_param(jitterrng, uint, 0644);
+MODULE_PARM_DESC(jitterrng, "Entropy in bits of 256 data bits from Jitter RNG noise source");
+#endif
+
+static bool lrng_jent_initialized = false;
+static struct rand_data *lrng_jent_state;
+
+static int __init lrng_jent_initialize(void)
+{
+ /* Initialize the Jitter RNG after the clocksources are initialized. */
+ if (jent_entropy_init() ||
+ (lrng_jent_state = jent_entropy_collector_alloc(1, 0)) == NULL) {
+ jitterrng = 0;
+ pr_info("Jitter RNG unusable on current system\n");
+ return 0;
+ }
+ lrng_jent_initialized = true;
+ lrng_pool_add_entropy();
+ pr_debug("Jitter RNG working on current system\n");
+
+ return 0;
+}
+device_initcall(lrng_jent_initialize);
+
+/*
+ * lrng_get_jent() - Get Jitter RNG entropy
+ *
+ * @outbuf: buffer to store entropy
+ * @outbuflen: length of buffer
+ *
+ * Return:
+ * * > 0 on success where value provides the added entropy in bits
+ * * 0 if no fast source was available
+ */
+u32 lrng_get_jent(u8 *outbuf, u32 requested_bits)
+{
+ int ret;
+ u32 ent_bits = lrng_jent_entropylevel(requested_bits);
+ unsigned long flags;
+ static DEFINE_SPINLOCK(lrng_jent_lock);
+
+ spin_lock_irqsave(&lrng_jent_lock, flags);
+
+ if (!lrng_jent_initialized) {
+ spin_unlock_irqrestore(&lrng_jent_lock, flags);
+ return 0;
+ }
+
+ ret = jent_read_entropy(lrng_jent_state, outbuf, requested_bits >> 3);
+ spin_unlock_irqrestore(&lrng_jent_lock, flags);
+
+ if (ret) {
+ pr_debug("Jitter RNG failed with %d\n", ret);
+ return 0;
+ }
+
+ pr_debug("obtained %u bits of entropy from Jitter RNG noise source\n",
+ ent_bits);
+
+ return ent_bits;
+}
+
+u32 lrng_jent_entropylevel(u32 requested_bits)
+{
+ return lrng_fast_noise_entropylevel((lrng_jent_initialized) ?
+ jitterrng : 0, requested_bits);
+}
+
+void lrng_jent_es_state(unsigned char *buf, size_t buflen)
+{
+ snprintf(buf, buflen,
+ "JitterRNG ES properties:\n"
+ " Enabled: %s\n", lrng_jent_initialized ? "true" : "false");
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_es_mgr.c linux-5.15-lrng/drivers/char/lrng/lrng_es_mgr.c
--- linux-5.15/drivers/char/lrng/lrng_es_mgr.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_es_mgr.c 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,373 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG Entropy sources management
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/irq_regs.h>
+#include <linux/percpu.h>
+#include <linux/random.h>
+#include <linux/utsname.h>
+#include <linux/workqueue.h>
+
+#include "lrng_internal.h"
+
+struct lrng_state {
+ bool can_invalidate; /* Can invalidate batched entropy? */
+ bool perform_seedwork; /* Can seed work be performed? */
+ bool lrng_operational; /* Is DRNG operational? */
+ bool lrng_fully_seeded; /* Is DRNG fully seeded? */
+ bool lrng_min_seeded; /* Is DRNG minimally seeded? */
+ bool all_online_numa_node_seeded;/* All NUMA DRNGs seeded? */
+
+ /*
+ * To ensure that external entropy providers cannot dominate the
+ * internal noise sources but yet cannot be dominated by internal
+ * noise sources, the following booleans are intended to allow
+ * external to provide seed once when a DRNG reseed occurs. This
+ * triggering of external noise source is performed even when the
+ * entropy pool has sufficient entropy.
+ */
+ bool lrng_seed_hw; /* Allow HW to provide seed */
+ bool lrng_seed_user; /* Allow user space to provide seed */
+
+ atomic_t boot_entropy_thresh; /* Reseed threshold */
+ atomic_t reseed_in_progress; /* Flag for on executing reseed */
+ struct work_struct lrng_seed_work; /* (re)seed work queue */
+};
+
+static struct lrng_state lrng_state = {
+ false, false, false, false, false, false, true, true,
+ .boot_entropy_thresh = ATOMIC_INIT(LRNG_INIT_ENTROPY_BITS),
+ .reseed_in_progress = ATOMIC_INIT(0),
+};
+
+/********************************** Helper ***********************************/
+
+/* External entropy provider is allowed to provide seed data */
+bool lrng_state_exseed_allow(enum lrng_external_noise_source source)
+{
+ if (source == lrng_noise_source_hw)
+ return lrng_state.lrng_seed_hw;
+ return lrng_state.lrng_seed_user;
+}
+
+/* Enable / disable external entropy provider to furnish seed */
+void lrng_state_exseed_set(enum lrng_external_noise_source source, bool type)
+{
+ if (source == lrng_noise_source_hw)
+ lrng_state.lrng_seed_hw = type;
+ else
+ lrng_state.lrng_seed_user = type;
+}
+
+static inline void lrng_state_exseed_allow_all(void)
+{
+ lrng_state_exseed_set(lrng_noise_source_hw, true);
+ lrng_state_exseed_set(lrng_noise_source_user, true);
+}
+
+/*
+ * Reading of the LRNG pool is only allowed by one caller. The reading is
+ * only performed to (re)seed DRNGs. Thus, if this "lock" is already taken,
+ * the reseeding operation is in progress. The caller is not intended to wait
+ * but continue with its other operation.
+ */
+int lrng_pool_trylock(void)
+{
+ return atomic_cmpxchg(&lrng_state.reseed_in_progress, 0, 1);
+}
+
+void lrng_pool_unlock(void)
+{
+ atomic_set(&lrng_state.reseed_in_progress, 0);
+}
+
+/* Set new entropy threshold for reseeding during boot */
+void lrng_set_entropy_thresh(u32 new_entropy_bits)
+{
+ atomic_set(&lrng_state.boot_entropy_thresh, new_entropy_bits);
+}
+
+/*
+ * Reset LRNG state - the entropy counters are reset, but the data that may
+ * or may not have entropy remains in the pools as this data will not hurt.
+ */
+void lrng_reset_state(void)
+{
+ lrng_pool_set_entropy(0);
+ lrng_pcpu_reset();
+ lrng_state.lrng_operational = false;
+ lrng_state.lrng_fully_seeded = false;
+ lrng_state.lrng_min_seeded = false;
+ lrng_state.all_online_numa_node_seeded = false;
+ pr_debug("reset LRNG\n");
+}
+
+/* Set flag that all DRNGs are fully seeded */
+void lrng_pool_all_numa_nodes_seeded(bool set)
+{
+ lrng_state.all_online_numa_node_seeded = set;
+}
+
+/* Return boolean whether LRNG reached minimally seed level */
+bool lrng_state_min_seeded(void)
+{
+ return lrng_state.lrng_min_seeded;
+}
+
+/* Return boolean whether LRNG reached fully seed level */
+bool lrng_state_fully_seeded(void)
+{
+ return lrng_state.lrng_fully_seeded;
+}
+
+/* Return boolean whether LRNG is considered fully operational */
+bool lrng_state_operational(void)
+{
+ return lrng_state.lrng_operational;
+}
+
+/* Policy to check whether entropy buffer contains full seeded entropy */
+bool lrng_fully_seeded(bool fully_seeded, struct entropy_buf *eb)
+{
+ return ((eb->a_bits + eb->b_bits + eb->c_bits + eb->d_bits) >=
+ lrng_get_seed_entropy_osr(fully_seeded));
+}
+
+/* Mark one DRNG as not fully seeded */
+void lrng_unset_fully_seeded(struct lrng_drng *drng)
+{
+ drng->fully_seeded = false;
+ lrng_pool_all_numa_nodes_seeded(false);
+
+ /*
+ * The init DRNG instance must always be fully seeded as this instance
+ * is the fall-back if any of the per-NUMA node DRNG instances is
+ * insufficiently seeded. Thus, we mark the entire LRNG as
+ * non-operational if the initial DRNG becomes not fully seeded.
+ */
+ if (drng == lrng_drng_init_instance() && lrng_state_operational()) {
+ pr_debug("LRNG set to non-operational\n");
+ lrng_state.lrng_operational = false;
+ lrng_state.lrng_fully_seeded = false;
+
+ /* If sufficient entropy is available, reseed now. */
+ lrng_pool_add_entropy();
+ }
+}
+
+/* Policy to enable LRNG operational mode */
+static inline void lrng_set_operational(u32 external_es)
+{
+ /* LRNG is operational if the initial DRNG is fully seeded ... */
+ if (lrng_state.lrng_fully_seeded &&
+ /* ... and either internal ES SP800-90B startup is complete ... */
+ (lrng_sp80090b_startup_complete() ||
+ /* ... or the external ES provided sufficient entropy. */
+ (lrng_get_seed_entropy_osr(lrng_state_fully_seeded()) <=
+ external_es))) {
+ lrng_state.lrng_operational = true;
+ lrng_process_ready_list();
+ lrng_init_wakeup();
+ pr_info("LRNG fully operational\n");
+ }
+}
+
+/* Available entropy in the entire LRNG considering all entropy sources */
+u32 lrng_avail_entropy(void)
+{
+ u32 ent_thresh = lrng_security_strength();
+
+ /*
+ * Apply oversampling during initialization according to SP800-90C as
+ * we request a larger buffer from the ES.
+ */
+ if (lrng_sp80090c_compliant() &&
+ !lrng_state.all_online_numa_node_seeded)
+ ent_thresh += CONFIG_LRNG_SEED_BUFFER_INIT_ADD_BITS;
+
+ return lrng_pcpu_avail_entropy() + lrng_avail_aux_entropy() +
+ lrng_archrandom_entropylevel(ent_thresh) +
+ lrng_jent_entropylevel(ent_thresh);
+}
+
+/*
+ * lrng_init_ops() - Set seed stages of LRNG
+ *
+ * Set the slow noise source reseed trigger threshold. The initial threshold
+ * is set to the minimum data size that can be read from the pool: a word. Upon
+ * reaching this value, the next seed threshold of 128 bits is set followed
+ * by 256 bits.
+ *
+ * @eb: buffer containing the size of entropy currently injected into DRNG
+ */
+void lrng_init_ops(struct entropy_buf *eb)
+{
+ struct lrng_state *state = &lrng_state;
+ u32 requested_bits, seed_bits, external_es;
+
+ if (state->lrng_operational)
+ return;
+
+ requested_bits = lrng_get_seed_entropy_osr(
+ state->all_online_numa_node_seeded);
+
+ /*
+ * Entropy provided by external entropy sources - if they provide
+ * the requested amount of entropy, unblock the interface.
+ */
+ external_es = eb->a_bits + eb->c_bits + eb->d_bits;
+ seed_bits = external_es + eb->b_bits;
+
+ /* DRNG is seeded with full security strength */
+ if (state->lrng_fully_seeded) {
+ lrng_set_operational(external_es);
+ lrng_set_entropy_thresh(requested_bits);
+ } else if (lrng_fully_seeded(state->all_online_numa_node_seeded, eb)) {
+ if (state->can_invalidate)
+ invalidate_batched_entropy();
+
+ state->lrng_fully_seeded = true;
+ lrng_set_operational(external_es);
+ state->lrng_min_seeded = true;
+ pr_info("LRNG fully seeded with %u bits of entropy\n",
+ seed_bits);
+ lrng_set_entropy_thresh(requested_bits);
+ } else if (!state->lrng_min_seeded) {
+
+ /* DRNG is seeded with at least 128 bits of entropy */
+ if (seed_bits >= LRNG_MIN_SEED_ENTROPY_BITS) {
+ if (state->can_invalidate)
+ invalidate_batched_entropy();
+
+ state->lrng_min_seeded = true;
+ pr_info("LRNG minimally seeded with %u bits of entropy\n",
+ seed_bits);
+ lrng_set_entropy_thresh(requested_bits);
+ lrng_init_wakeup();
+
+ /* DRNG is seeded with at least LRNG_INIT_ENTROPY_BITS bits */
+ } else if (seed_bits >= LRNG_INIT_ENTROPY_BITS) {
+ pr_info("LRNG initial entropy level %u bits of entropy\n",
+ seed_bits);
+ lrng_set_entropy_thresh(LRNG_MIN_SEED_ENTROPY_BITS);
+ }
+ }
+}
+
+int __init rand_initialize(void)
+{
+ struct seed {
+ ktime_t time;
+ unsigned long data[(LRNG_MAX_DIGESTSIZE /
+ sizeof(unsigned long))];
+ struct new_utsname utsname;
+ } seed __aligned(LRNG_KCAPI_ALIGN);
+ unsigned int i;
+
+ BUILD_BUG_ON(LRNG_MAX_DIGESTSIZE % sizeof(unsigned long));
+
+ seed.time = ktime_get_real();
+
+ for (i = 0; i < ARRAY_SIZE(seed.data); i++) {
+ if (!arch_get_random_seed_long_early(&(seed.data[i])) &&
+ !arch_get_random_long_early(&seed.data[i]))
+ seed.data[i] = random_get_entropy();
+ }
+ memcpy(&seed.utsname, utsname(), sizeof(*(utsname())));
+
+ lrng_pool_insert_aux((u8 *)&seed, sizeof(seed), 0);
+ memzero_explicit(&seed, sizeof(seed));
+
+ /* Initialize the seed work queue */
+ INIT_WORK(&lrng_state.lrng_seed_work, lrng_drng_seed_work);
+ lrng_state.perform_seedwork = true;
+
+ lrng_drngs_init_cc20(true);
+ invalidate_batched_entropy();
+
+ lrng_state.can_invalidate = true;
+
+ return 0;
+}
+
+/* Interface requesting a reseed of the DRNG */
+void lrng_pool_add_entropy(void)
+{
+ /*
+ * Once all DRNGs are fully seeded, the interrupt noise
+ * sources will not trigger any reseeding any more.
+ */
+ if (likely(lrng_state.all_online_numa_node_seeded))
+ return;
+
+ /* Only try to reseed if the DRNG is alive. */
+ if (!lrng_get_available())
+ return;
+
+ /* Only trigger the DRNG reseed if we have collected entropy. */
+ if (lrng_avail_entropy() <
+ atomic_read_u32(&lrng_state.boot_entropy_thresh))
+ return;
+
+ /* Ensure that the seeding only occurs once at any given time. */
+ if (lrng_pool_trylock())
+ return;
+
+ /* Seed the DRNG with any available noise. */
+ if (lrng_state.perform_seedwork)
+ schedule_work(&lrng_state.lrng_seed_work);
+ else
+ lrng_drng_seed_work(NULL);
+}
+
+/* Fill the seed buffer with data from the noise sources */
+void lrng_fill_seed_buffer(struct entropy_buf *entropy_buf, u32 requested_bits)
+{
+ struct lrng_state *state = &lrng_state;
+ u32 req_ent = lrng_sp80090c_compliant() ?
+ lrng_security_strength() : LRNG_MIN_SEED_ENTROPY_BITS;
+
+ /* Guarantee that requested bits is a multiple of bytes */
+ BUILD_BUG_ON(LRNG_DRNG_SECURITY_STRENGTH_BITS % 8);
+
+ /* always reseed the DRNG with the current time stamp */
+ entropy_buf->now = random_get_entropy();
+
+ /*
+ * Require at least 128 bits of entropy for any reseed. If the LRNG is
+ * operated SP800-90C compliant we want to comply with SP800-90A section
+ * 9.2 mandating that DRNG is reseeded with the security strength.
+ */
+ if (state->lrng_fully_seeded && (lrng_avail_entropy() < req_ent)) {
+ entropy_buf->a_bits = entropy_buf->b_bits = 0;
+ entropy_buf->c_bits = entropy_buf->d_bits = 0;
+ goto wakeup;
+ }
+
+ /* Concatenate the output of the entropy sources. */
+ entropy_buf->b_bits = lrng_pcpu_pool_hash(entropy_buf->b,
+ requested_bits,
+ state->lrng_fully_seeded);
+ entropy_buf->c_bits = lrng_get_arch(entropy_buf->c, requested_bits);
+ entropy_buf->d_bits = lrng_get_jent(entropy_buf->d, requested_bits);
+ lrng_get_backtrack_aux(entropy_buf, requested_bits);
+
+ /* allow external entropy provider to provide seed */
+ lrng_state_exseed_allow_all();
+
+wakeup:
+ /*
+ * Shall we wake up user space writers? This location covers
+ * ensures that the user space provider does not dominate the internal
+ * noise sources since in case the first call of this function finds
+ * sufficient entropy in the entropy pool, it will not trigger the
+ * wakeup. This implies that when the next /dev/urandom read happens,
+ * the entropy pool is drained.
+ */
+ lrng_writer_wakeup();
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_health.c linux-5.15-lrng/drivers/char/lrng/lrng_health.c
--- linux-5.15/drivers/char/lrng/lrng_health.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_health.c 2021-11-29 12:38:11.793278870 +1100
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Linux Random Number Generator (LRNG) Health Testing
+ *
+ * Copyright (C) 2019 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/fips.h>
+#include <linux/module.h>
+
+#include "lrng_internal.h"
+
+/* Stuck Test */
+struct lrng_stuck_test {
+ u32 last_time; /* Stuck test: time of previous IRQ */
+ u32 last_delta; /* Stuck test: delta of previous IRQ */
+ u32 last_delta2; /* Stuck test: 2. time derivation of prev IRQ */
+};
+
+/* Repetition Count Test */
+struct lrng_rct {
+ atomic_t rct_count; /* Number of stuck values */
+};
+
+/* Adaptive Proportion Test */
+struct lrng_apt {
+ /* Data window size */
+#define LRNG_APT_WINDOW_SIZE 512
+ /* LSB of time stamp to process */
+#define LRNG_APT_LSB 16
+#define LRNG_APT_WORD_MASK (LRNG_APT_LSB - 1)
+ atomic_t apt_count; /* APT counter */
+ atomic_t apt_base; /* APT base reference */
+
+ atomic_t apt_trigger;
+ bool apt_base_set; /* Is APT base set? */
+};
+
+/* The health test code must operate lock-less */
+struct lrng_health {
+ struct lrng_rct rct;
+ struct lrng_apt apt;
+
+ bool health_test_enabled;
+
+ /* SP800-90B startup health tests */
+#define LRNG_SP80090B_STARTUP_SAMPLES 1024
+#define LRNG_SP80090B_STARTUP_BLOCKS ((LRNG_SP80090B_STARTUP_SAMPLES + \
+ LRNG_APT_WINDOW_SIZE - 1) / \
+ LRNG_APT_WINDOW_SIZE)
+ bool sp80090b_startup_done;
+ atomic_t sp80090b_startup_blocks;
+};
+
+static struct lrng_health lrng_health = {
+ .rct.rct_count = ATOMIC_INIT(0),
+
+ .apt.apt_count = ATOMIC_INIT(0),
+ .apt.apt_base = ATOMIC_INIT(-1),
+ .apt.apt_trigger = ATOMIC_INIT(LRNG_APT_WINDOW_SIZE),
+ .apt.apt_base_set = false,
+
+ .health_test_enabled = true,
+
+ .sp80090b_startup_blocks = ATOMIC_INIT(LRNG_SP80090B_STARTUP_BLOCKS),
+ .sp80090b_startup_done = false,
+};
+
+static DEFINE_PER_CPU(struct lrng_stuck_test, lrng_stuck_test);
+
+static inline bool lrng_sp80090b_health_requested(void)
+{
+ /* Health tests are only requested in FIPS mode */
+ return fips_enabled;
+}
+
+static inline bool lrng_sp80090b_health_enabled(void)
+{
+ struct lrng_health *health = &lrng_health;
+
+ return lrng_sp80090b_health_requested() && health->health_test_enabled;
+}
+
+/***************************************************************************
+ * SP800-90B Compliance
+ *
+ * If the Linux-RNG is booted into FIPS mode, the following interfaces
+ * provide an SP800-90B compliant noise source:
+ *
+ * * /dev/random
+ * * getrandom(2)
+ * * get_random_bytes when using it in conjunction with
+ * add_random_ready_callback
+ *
+ * All other interfaces, including /dev/urandom or get_random_bytes without
+ * the add_random_ready_callback cannot claim to use an SP800-90B compliant
+ * noise source.
+ ***************************************************************************/
+
+/*
+ * Perform SP800-90B startup testing
+ */
+static inline void lrng_sp80090b_startup(struct lrng_health *health)
+{
+ if (!health->sp80090b_startup_done &&
+ atomic_dec_and_test(&health->sp80090b_startup_blocks)) {
+ struct entropy_buf eb;
+
+ health->sp80090b_startup_done = true;
+ pr_info("SP800-90B startup health tests completed\n");
+ memset(&eb, 0, sizeof(eb));
+ lrng_init_ops(&eb);
+
+ /*
+ * Force a reseed of DRNGs to ensure they are seeded with
+ * entropy that passed the SP800-90B health tests.
+ * As the DRNG always will reseed before generating
+ * random numbers, it does not need a reseed trigger.
+ */
+ lrng_drng_force_reseed();
+ }
+}
+
+/*
+ * Handle failure of SP800-90B startup testing
+ */
+static inline void lrng_sp80090b_startup_failure(struct lrng_health *health)
+{
+ /* Reset of LRNG and its entropy - NOTE: we are in atomic context */
+ lrng_reset();
+
+ /*
+ * Reset the SP800-90B startup test.
+ *
+ * NOTE SP800-90B section 4.3 bullet 4 does not specify what
+ * exactly is to be done in case of failure! Thus, we do what
+ * makes sense, i.e. restarting the health test and thus gating
+ * the output function of /dev/random and getrandom(2).
+ */
+ atomic_set(&health->sp80090b_startup_blocks,
+ LRNG_SP80090B_STARTUP_BLOCKS);
+}
+
+/*
+ * Handle failure of SP800-90B runtime testing
+ */
+static inline void lrng_sp80090b_runtime_failure(struct lrng_health *health)
+{
+ lrng_sp80090b_startup_failure(health);
+ health->sp80090b_startup_done = false;
+}
+
+static inline void lrng_sp80090b_failure(struct lrng_health *health)
+{
+ if (health->sp80090b_startup_done) {
+ pr_err("SP800-90B runtime health test failure - invalidating all existing entropy and initiate SP800-90B startup\n");
+ lrng_sp80090b_runtime_failure(health);
+ } else {
+ pr_err("SP800-90B startup test failure - resetting\n");
+ lrng_sp80090b_startup_failure(health);
+ }
+}
+
+/*
+ * Is the SP800-90B startup testing complete?
+ *
+ * This function is called by the LRNG to determine whether to unblock
+ * a certain user interface. Therefore, only the potentially blocking
+ * user interfaces are considered SP800-90B compliant.
+ */
+bool lrng_sp80090b_startup_complete(void)
+{
+ struct lrng_health *health = &lrng_health;
+
+ return (lrng_sp80090b_health_enabled()) ? health->sp80090b_startup_done:
+ true;
+}
+
+bool lrng_sp80090b_compliant(void)
+{
+ struct lrng_health *health = &lrng_health;
+
+ return lrng_sp80090b_health_enabled() && health->sp80090b_startup_done;
+}
+
+/***************************************************************************
+ * Adaptive Proportion Test
+ *
+ * This test complies with SP800-90B section 4.4.2.
+ ***************************************************************************/
+
+/*
+ * Reset the APT counter
+ *
+ * @health [in] Reference to health state
+ */
+static inline void lrng_apt_reset(struct lrng_health *health,
+ unsigned int time_masked)
+{
+ struct lrng_apt *apt = &health->apt;
+
+ pr_debug("APT value %d for base %d\n",
+ atomic_read(&apt->apt_count), atomic_read(&apt->apt_base));
+
+ /* Reset APT */
+ atomic_set(&apt->apt_count, 0);
+ atomic_set(&apt->apt_base, time_masked);
+}
+
+static inline void lrng_apt_restart(struct lrng_health *health)
+{
+ struct lrng_apt *apt = &health->apt;
+
+ atomic_set(&apt->apt_trigger, LRNG_APT_WINDOW_SIZE);
+}
+
+/*
+ * Insert a new entropy event into APT
+ *
+ * This function does is void as it does not decide about the fate of a time
+ * stamp. An APT failure can only happen at the same time of a stuck test
+ * failure. Thus, the stuck failure will already decide how the time stamp
+ * is handled.
+ *
+ * @health [in] Reference to health state
+ * @now_time [in] Time stamp to process
+ */
+static inline void lrng_apt_insert(struct lrng_health *health,
+ unsigned int now_time)
+{
+ struct lrng_apt *apt = &health->apt;
+
+ if (!lrng_sp80090b_health_requested())
+ return;
+
+ now_time &= LRNG_APT_WORD_MASK;
+
+ /* Initialization of APT */
+ if (!apt->apt_base_set) {
+ atomic_set(&apt->apt_base, now_time);
+ apt->apt_base_set = true;
+ return;
+ }
+
+ if (now_time == (unsigned int)atomic_read(&apt->apt_base)) {
+ u32 apt_val = (u32)atomic_inc_return_relaxed(&apt->apt_count);
+
+ if (apt_val >= CONFIG_LRNG_APT_CUTOFF)
+ lrng_sp80090b_failure(health);
+ }
+
+ if (atomic_dec_and_test(&apt->apt_trigger)) {
+ lrng_apt_restart(health);
+ lrng_apt_reset(health, now_time);
+ lrng_sp80090b_startup(health);
+ }
+}
+
+/***************************************************************************
+ * Repetition Count Test
+ *
+ * The LRNG uses an enhanced version of the Repetition Count Test
+ * (RCT) specified in SP800-90B section 4.4.1. Instead of counting identical
+ * back-to-back values, the input to the RCT is the counting of the stuck
+ * values while filling the entropy pool.
+ *
+ * The RCT is applied with an alpha of 2^-30 compliant to FIPS 140-2 IG 9.8.
+ *
+ * During the counting operation, the LRNG always calculates the RCT
+ * cut-off value of C. If that value exceeds the allowed cut-off value,
+ * the LRNG will invalidate all entropy for the entropy pool which implies
+ * that no data can be extracted from the entropy pool unless new entropy
+ * is received.
+ ***************************************************************************/
+
+/*
+ * Hot code path - Insert data for Repetition Count Test
+ *
+ * @health: Reference to health information
+ * @stuck: Decision of stuck test
+ */
+static inline void lrng_rct(struct lrng_health *health, int stuck)
+{
+ struct lrng_rct *rct = &health->rct;
+
+ if (!lrng_sp80090b_health_requested())
+ return;
+
+ if (stuck) {
+ u32 rct_count = atomic_add_return_relaxed(1, &rct->rct_count);
+
+ pr_debug("RCT count: %u\n", rct_count);
+
+ /*
+ * The cutoff value is based on the following consideration:
+ * alpha = 2^-30 as recommended in FIPS 140-2 IG 9.8.
+ * In addition, we imply an entropy value H of 1 bit as this
+ * is the minimum entropy required to provide full entropy.
+ *
+ * Note, rct_count (which equals to value B in the
+ * pseudo code of SP800-90B section 4.4.1) starts with zero.
+ * Hence we need to subtract one from the cutoff value as
+ * calculated following SP800-90B.
+ */
+ if (rct_count >= CONFIG_LRNG_RCT_CUTOFF) {
+ atomic_set(&rct->rct_count, 0);
+
+ /*
+ * APT must start anew as we consider all previously
+ * recorded data to contain no entropy.
+ */
+ lrng_apt_restart(health);
+
+ lrng_sp80090b_failure(health);
+ }
+ } else {
+ atomic_set(&rct->rct_count, 0);
+ }
+}
+
+/***************************************************************************
+ * Stuck Test
+ *
+ * Checking the:
+ * 1st derivative of the event occurrence (time delta)
+ * 2nd derivative of the event occurrence (delta of time deltas)
+ * 3rd derivative of the event occurrence (delta of delta of time deltas)
+ *
+ * All values must always be non-zero. The stuck test is only valid disabled if
+ * high-resolution time stamps are identified after initialization.
+ ***************************************************************************/
+
+static inline u32 lrng_delta(u32 prev, u32 next)
+{
+ /*
+ * Note that this (unsigned) subtraction does yield the correct value
+ * in the wraparound-case, i.e. when next < prev.
+ */
+ return (next - prev);
+}
+
+/*
+ * Hot code path
+ *
+ * @health: Reference to health information
+ * @now: Event time
+ * @return: 0 event occurrence not stuck (good time stamp)
+ * != 0 event occurrence stuck (reject time stamp)
+ */
+static inline int lrng_irq_stuck(struct lrng_stuck_test *stuck, u32 now_time)
+{
+ u32 delta = lrng_delta(stuck->last_time, now_time);
+ u32 delta2 = lrng_delta(stuck->last_delta, delta);
+ u32 delta3 = lrng_delta(stuck->last_delta2, delta2);
+
+ stuck->last_time = now_time;
+ stuck->last_delta = delta;
+ stuck->last_delta2 = delta2;
+
+ if (!delta || !delta2 || !delta3)
+ return 1;
+
+ return 0;
+}
+
+/***************************************************************************
+ * Health test interfaces
+ ***************************************************************************/
+
+/*
+ * Disable all health tests
+ */
+void lrng_health_disable(void)
+{
+ struct lrng_health *health = &lrng_health;
+
+ health->health_test_enabled = false;
+
+ if (lrng_sp80090b_health_requested())
+ pr_warn("SP800-90B compliance requested but the Linux RNG is NOT SP800-90B compliant\n");
+}
+
+/*
+ * Hot code path - Perform health test on time stamp received from an event
+ *
+ * @now_time Time stamp
+ */
+enum lrng_health_res lrng_health_test(u32 now_time)
+{
+ struct lrng_health *health = &lrng_health;
+ struct lrng_stuck_test *stuck_test = this_cpu_ptr(&lrng_stuck_test);
+ int stuck;
+
+ if (!health->health_test_enabled)
+ return lrng_health_pass;
+
+ lrng_apt_insert(health, now_time);
+
+ stuck = lrng_irq_stuck(stuck_test, now_time);
+ lrng_rct(health, stuck);
+ if (stuck) {
+ /* SP800-90B disallows using a failing health test time stamp */
+ return lrng_sp80090b_health_requested() ?
+ lrng_health_fail_drop : lrng_health_fail_use;
+ }
+
+ return lrng_health_pass;
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_interfaces.c linux-5.15-lrng/drivers/char/lrng/lrng_interfaces.c
--- linux-5.15/drivers/char/lrng/lrng_interfaces.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_interfaces.c 2021-11-29 12:37:03.083279132 +1100
@@ -0,0 +1,654 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG User and kernel space interfaces
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/freezer.h>
+#include <linux/fs.h>
+#include <linux/genhd.h>
+#include <linux/hw_random.h>
+#include <linux/kthread.h>
+#include <linux/poll.h>
+#include <linux/preempt.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/timex.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/random.h>
+
+#include "lrng_internal.h"
+
+/*
+ * If the entropy count falls under this number of bits, then we
+ * should wake up processes which are selecting or polling on write
+ * access to /dev/random.
+ */
+u32 lrng_write_wakeup_bits = (LRNG_WRITE_WAKEUP_ENTROPY << 3);
+
+static LIST_HEAD(lrng_ready_list);
+static DEFINE_SPINLOCK(lrng_ready_list_lock);
+
+static DECLARE_WAIT_QUEUE_HEAD(lrng_write_wait);
+static DECLARE_WAIT_QUEUE_HEAD(lrng_init_wait);
+static struct fasync_struct *fasync;
+
+/********************************** Helper ***********************************/
+
+/* Is the DRNG seed level too low? */
+static inline bool lrng_need_entropy(void)
+{
+ return (lrng_avail_aux_entropy() < lrng_write_wakeup_bits);
+}
+
+void lrng_writer_wakeup(void)
+{
+ if (lrng_need_entropy() && wq_has_sleeper(&lrng_write_wait)) {
+ wake_up_interruptible(&lrng_write_wait);
+ kill_fasync(&fasync, SIGIO, POLL_OUT);
+ }
+}
+
+void lrng_init_wakeup(void)
+{
+ wake_up_all(&lrng_init_wait);
+ kill_fasync(&fasync, SIGIO, POLL_IN);
+}
+
+/**
+ * lrng_process_ready_list() - Ping all kernel internal callers waiting until
+ * the DRNG is completely initialized to inform that the DRNG reached that
+ * seed level.
+ *
+ * When the SP800-90B testing is enabled, the ping only happens if the SP800-90B
+ * startup health tests are completed. This implies that kernel internal
+ * callers always have an SP800-90B compliant noise source when being
+ * pinged.
+ */
+void lrng_process_ready_list(void)
+{
+ unsigned long flags;
+ struct random_ready_callback *rdy, *tmp;
+
+ if (!lrng_state_operational())
+ return;
+
+ spin_lock_irqsave(&lrng_ready_list_lock, flags);
+ list_for_each_entry_safe(rdy, tmp, &lrng_ready_list, list) {
+ struct module *owner = rdy->owner;
+
+ list_del_init(&rdy->list);
+ rdy->func(rdy);
+ module_put(owner);
+ }
+ spin_unlock_irqrestore(&lrng_ready_list_lock, flags);
+}
+
+void lrng_debug_report_seedlevel(const char *name)
+{
+#ifdef CONFIG_WARN_ALL_UNSEEDED_RANDOM
+ static void *previous = NULL;
+ void *caller = (void *) _RET_IP_;
+
+ if (READ_ONCE(previous) == caller)
+ return;
+
+ if (!lrng_state_min_seeded())
+ pr_notice("%pS %s called without reaching minimally seeded level (available entropy %u)\n",
+ caller, name, lrng_avail_entropy());
+
+ WRITE_ONCE(previous, caller);
+#endif
+}
+
+/************************ LRNG kernel input interfaces ************************/
+
+/*
+ * add_hwgenerator_randomness() - Interface for in-kernel drivers of true
+ * hardware RNGs.
+ *
+ * Those devices may produce endless random bits and will be throttled
+ * when our pool is full.
+ *
+ * @buffer: buffer holding the entropic data from HW noise sources to be used to
+ * insert into entropy pool.
+ * @count: length of buffer
+ * @entropy_bits: amount of entropy in buffer (value is in bits)
+ */
+void add_hwgenerator_randomness(const char *buffer, size_t count,
+ size_t entropy_bits)
+{
+ /*
+ * Suspend writing if we are fully loaded with entropy.
+ * We'll be woken up again once below lrng_write_wakeup_thresh,
+ * or when the calling thread is about to terminate.
+ */
+ wait_event_interruptible(lrng_write_wait,
+ lrng_need_entropy() ||
+ lrng_state_exseed_allow(lrng_noise_source_hw) ||
+ kthread_should_stop());
+ lrng_state_exseed_set(lrng_noise_source_hw, false);
+ lrng_pool_insert_aux(buffer, count, entropy_bits);
+}
+EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
+
+/*
+ * add_bootloader_randomness() - Handle random seed passed by bootloader.
+ *
+ * If the seed is trustworthy, it would be regarded as hardware RNGs. Otherwise
+ * it would be regarded as device data.
+ * The decision is controlled by CONFIG_RANDOM_TRUST_BOOTLOADER.
+ *
+ * @buf: buffer holding the entropic data from HW noise sources to be used to
+ * insert into entropy pool.
+ * @size: length of buffer
+ */
+void add_bootloader_randomness(const void *buf, unsigned int size)
+{
+ lrng_pool_insert_aux(buf, size,
+ IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER) ?
+ size * 8 : 0);
+}
+EXPORT_SYMBOL_GPL(add_bootloader_randomness);
+
+/*
+ * Callback for HID layer -- use the HID event values to stir the entropy pool
+ */
+void add_input_randomness(unsigned int type, unsigned int code,
+ unsigned int value)
+{
+ static unsigned char last_value;
+
+ /* ignore autorepeat and the like */
+ if (value == last_value)
+ return;
+
+ last_value = value;
+
+ lrng_pcpu_array_add_u32((type << 4) ^ code ^ (code >> 4) ^ value);
+}
+EXPORT_SYMBOL_GPL(add_input_randomness);
+
+/*
+ * add_device_randomness() - Add device- or boot-specific data to the entropy
+ * pool to help initialize it.
+ *
+ * None of this adds any entropy; it is meant to avoid the problem of
+ * the entropy pool having similar initial state across largely
+ * identical devices.
+ *
+ * @buf: buffer holding the entropic data from HW noise sources to be used to
+ * insert into entropy pool.
+ * @size: length of buffer
+ */
+void add_device_randomness(const void *buf, unsigned int size)
+{
+ lrng_pool_insert_aux((u8 *)buf, size, 0);
+}
+EXPORT_SYMBOL(add_device_randomness);
+
+#ifdef CONFIG_BLOCK
+void rand_initialize_disk(struct gendisk *disk) { }
+void add_disk_randomness(struct gendisk *disk) { }
+EXPORT_SYMBOL(add_disk_randomness);
+#endif
+
+#ifndef CONFIG_LRNG_IRQ
+void add_interrupt_randomness(int irq, int irq_flg) { }
+EXPORT_SYMBOL(add_interrupt_randomness);
+#endif
+
+/*
+ * del_random_ready_callback() - Delete a previously registered readiness
+ * callback function.
+ *
+ * @rdy: callback definition that was registered initially
+ */
+void del_random_ready_callback(struct random_ready_callback *rdy)
+{
+ unsigned long flags;
+ struct module *owner = NULL;
+
+ spin_lock_irqsave(&lrng_ready_list_lock, flags);
+ if (!list_empty(&rdy->list)) {
+ list_del_init(&rdy->list);
+ owner = rdy->owner;
+ }
+ spin_unlock_irqrestore(&lrng_ready_list_lock, flags);
+
+ module_put(owner);
+}
+EXPORT_SYMBOL(del_random_ready_callback);
+
+/*
+ * add_random_ready_callback() - Add a callback function that will be invoked
+ * when the DRNG is fully initialized and seeded.
+ *
+ * @rdy: callback definition to be invoked when the LRNG is seeded
+ *
+ * Return:
+ * * 0 if callback is successfully added
+ * * -EALREADY if pool is already initialised (callback not called)
+ * * -ENOENT if module for callback is not alive
+ */
+int add_random_ready_callback(struct random_ready_callback *rdy)
+{
+ struct module *owner;
+ unsigned long flags;
+ int err = -EALREADY;
+
+ if (likely(lrng_state_operational()))
+ return err;
+
+ owner = rdy->owner;
+ if (!try_module_get(owner))
+ return -ENOENT;
+
+ spin_lock_irqsave(&lrng_ready_list_lock, flags);
+ if (lrng_state_operational())
+ goto out;
+
+ owner = NULL;
+
+ list_add(&rdy->list, &lrng_ready_list);
+ err = 0;
+
+out:
+ spin_unlock_irqrestore(&lrng_ready_list_lock, flags);
+
+ module_put(owner);
+
+ return err;
+}
+EXPORT_SYMBOL(add_random_ready_callback);
+
+/*********************** LRNG kernel output interfaces ************************/
+
+/*
+ * get_random_bytes() - Provider of cryptographic strong random numbers for
+ * kernel-internal usage.
+ *
+ * This function is appropriate for all in-kernel use cases. However,
+ * it will always use the ChaCha20 DRNG.
+ *
+ * @buf: buffer to store the random bytes
+ * @nbytes: size of the buffer
+ */
+void get_random_bytes(void *buf, int nbytes)
+{
+ lrng_drng_get_atomic((u8 *)buf, (u32)nbytes);
+ lrng_debug_report_seedlevel("get_random_bytes");
+}
+EXPORT_SYMBOL(get_random_bytes);
+
+/*
+ * get_random_bytes_full() - Provider of cryptographic strong random numbers
+ * for kernel-internal usage.
+ *
+ * This function is appropriate only for non-atomic use cases as this
+ * function may sleep. Though, it provides access to the full functionality
+ * of LRNG including the switchable DRNG support, that may support other
+ * DRNGs such as the SP800-90A DRBG.
+ *
+ * @buf: buffer to store the random bytes
+ * @nbytes: size of the buffer
+ */
+void get_random_bytes_full(void *buf, int nbytes)
+{
+ lrng_drng_get_sleep((u8 *)buf, (u32)nbytes);
+ lrng_debug_report_seedlevel("get_random_bytes_full");
+}
+EXPORT_SYMBOL(get_random_bytes_full);
+
+/*
+ * wait_for_random_bytes() - Wait for the LRNG to be seeded and thus
+ * guaranteed to supply cryptographically secure random numbers.
+ *
+ * This applies to: the /dev/urandom device, the get_random_bytes function,
+ * and the get_random_{u32,u64,int,long} family of functions. Using any of
+ * these functions without first calling this function forfeits the guarantee
+ * of security.
+ *
+ * Return:
+ * * 0 if the LRNG has been seeded.
+ * * -ERESTARTSYS if the function was interrupted by a signal.
+ */
+int wait_for_random_bytes(void)
+{
+ if (likely(lrng_state_min_seeded()))
+ return 0;
+ return wait_event_interruptible(lrng_init_wait,
+ lrng_state_min_seeded());
+}
+EXPORT_SYMBOL(wait_for_random_bytes);
+
+/*
+ * get_random_bytes_arch() - This function will use the architecture-specific
+ * hardware random number generator if it is available.
+ *
+ * The arch-specific hw RNG will almost certainly be faster than what we can
+ * do in software, but it is impossible to verify that it is implemented
+ * securely (as opposed, to, say, the AES encryption of a sequence number using
+ * a key known by the NSA). So it's useful if we need the speed, but only if
+ * we're willing to trust the hardware manufacturer not to have put in a back
+ * door.
+ *
+ * @buf: buffer allocated by caller to store the random data in
+ * @nbytes: length of outbuf
+ *
+ * Return: number of bytes filled in.
+ */
+int __must_check get_random_bytes_arch(void *buf, int nbytes)
+{
+ u8 *p = buf;
+
+ while (nbytes) {
+ unsigned long v;
+ int chunk = min_t(int, nbytes, sizeof(unsigned long));
+
+ if (!arch_get_random_long(&v))
+ break;
+
+ memcpy(p, &v, chunk);
+ p += chunk;
+ nbytes -= chunk;
+ }
+
+ if (nbytes)
+ lrng_drng_get_atomic((u8 *)p, (u32)nbytes);
+
+ return nbytes;
+}
+EXPORT_SYMBOL(get_random_bytes_arch);
+
+/*
+ * Returns whether or not the LRNG has been seeded.
+ *
+ * Returns: true if the urandom pool has been seeded.
+ * false if the urandom pool has not been seeded.
+ */
+bool rng_is_initialized(void)
+{
+ return lrng_state_operational();
+}
+EXPORT_SYMBOL(rng_is_initialized);
+
+/************************ LRNG user output interfaces *************************/
+
+static ssize_t lrng_read_common(char __user *buf, size_t nbytes)
+{
+ ssize_t ret = 0;
+ u8 tmpbuf[LRNG_DRNG_BLOCKSIZE] __aligned(LRNG_KCAPI_ALIGN);
+ u8 *tmp_large = NULL, *tmp = tmpbuf;
+ u32 tmplen = sizeof(tmpbuf);
+
+ if (nbytes == 0)
+ return 0;
+
+ /*
+ * Satisfy large read requests -- as the common case are smaller
+ * request sizes, such as 16 or 32 bytes, avoid a kmalloc overhead for
+ * those by using the stack variable of tmpbuf.
+ */
+ if (!CONFIG_BASE_SMALL && (nbytes > sizeof(tmpbuf))) {
+ tmplen = min_t(u32, nbytes, LRNG_DRNG_MAX_REQSIZE);
+ tmp_large = kmalloc(tmplen + LRNG_KCAPI_ALIGN, GFP_KERNEL);
+ if (!tmp_large)
+ tmplen = sizeof(tmpbuf);
+ else
+ tmp = PTR_ALIGN(tmp_large, LRNG_KCAPI_ALIGN);
+ }
+
+ while (nbytes) {
+ u32 todo = min_t(u32, nbytes, tmplen);
+ int rc = 0;
+
+ /* Reschedule if we received a large request. */
+ if ((tmp_large) && need_resched()) {
+ if (signal_pending(current)) {
+ if (ret == 0)
+ ret = -ERESTARTSYS;
+ break;
+ }
+ schedule();
+ }
+
+ rc = lrng_drng_get_sleep(tmp, todo);
+ if (rc <= 0) {
+ if (rc < 0)
+ ret = rc;
+ break;
+ }
+ if (copy_to_user(buf, tmp, rc)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ nbytes -= rc;
+ buf += rc;
+ ret += rc;
+ }
+
+ /* Wipe data just returned from memory */
+ if (tmp_large)
+ kfree_sensitive(tmp_large);
+ else
+ memzero_explicit(tmpbuf, sizeof(tmpbuf));
+
+ return ret;
+}
+
+static ssize_t
+lrng_read_common_block(int nonblock, char __user *buf, size_t nbytes)
+{
+ if (nbytes == 0)
+ return 0;
+
+ if (unlikely(!lrng_state_operational())) {
+ int ret;
+
+ if (nonblock)
+ return -EAGAIN;
+
+ ret = wait_event_interruptible(lrng_init_wait,
+ lrng_state_operational());
+ if (unlikely(ret))
+ return ret;
+ }
+
+ return lrng_read_common(buf, nbytes);
+}
+
+static ssize_t lrng_drng_read_block(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ return lrng_read_common_block(file->f_flags & O_NONBLOCK, buf, nbytes);
+}
+
+static __poll_t lrng_random_poll(struct file *file, poll_table *wait)
+{
+ __poll_t mask;
+
+ poll_wait(file, &lrng_init_wait, wait);
+ poll_wait(file, &lrng_write_wait, wait);
+ mask = 0;
+ if (lrng_state_operational())
+ mask |= EPOLLIN | EPOLLRDNORM;
+ if (lrng_need_entropy() ||
+ lrng_state_exseed_allow(lrng_noise_source_user)) {
+ lrng_state_exseed_set(lrng_noise_source_user, false);
+ mask |= EPOLLOUT | EPOLLWRNORM;
+ }
+ return mask;
+}
+
+static ssize_t lrng_drng_write_common(const char __user *buffer, size_t count,
+ u32 entropy_bits)
+{
+ ssize_t ret = 0;
+ u8 buf[64] __aligned(LRNG_KCAPI_ALIGN);
+ const char __user *p = buffer;
+ u32 orig_entropy_bits = entropy_bits;
+
+ if (!lrng_get_available())
+ return -EAGAIN;
+
+ count = min_t(size_t, count, INT_MAX);
+ while (count > 0) {
+ size_t bytes = min_t(size_t, count, sizeof(buf));
+ u32 ent = min_t(u32, bytes<<3, entropy_bits);
+
+ if (copy_from_user(&buf, p, bytes))
+ return -EFAULT;
+ /* Inject data into entropy pool */
+ lrng_pool_insert_aux(buf, bytes, ent);
+
+ count -= bytes;
+ p += bytes;
+ ret += bytes;
+ entropy_bits -= ent;
+
+ cond_resched();
+ }
+
+ /* Force reseed of DRNG during next data request. */
+ if (!orig_entropy_bits)
+ lrng_drng_force_reseed();
+
+ return ret;
+}
+
+static ssize_t lrng_drng_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ if (!lrng_state_min_seeded())
+ pr_notice_ratelimited("%s - use of insufficiently seeded DRNG (%zu bytes read)\n",
+ current->comm, nbytes);
+ else if (!lrng_state_operational())
+ pr_debug_ratelimited("%s - use of not fully seeded DRNG (%zu bytes read)\n",
+ current->comm, nbytes);
+
+ return lrng_read_common(buf, nbytes);
+}
+
+static ssize_t lrng_drng_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return lrng_drng_write_common(buffer, count, 0);
+}
+
+static long lrng_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ u32 digestsize_bits;
+ int size, ent_count_bits;
+ int __user *p = (int __user *)arg;
+
+ switch (cmd) {
+ case RNDGETENTCNT:
+ ent_count_bits = lrng_avail_entropy();
+ if (put_user(ent_count_bits, p))
+ return -EFAULT;
+ return 0;
+ case RNDADDTOENTCNT:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (get_user(ent_count_bits, p))
+ return -EFAULT;
+ ent_count_bits = (int)lrng_avail_aux_entropy() + ent_count_bits;
+ if (ent_count_bits < 0)
+ ent_count_bits = 0;
+ digestsize_bits = lrng_get_digestsize();
+ if (ent_count_bits > digestsize_bits)
+ ent_count_bits = digestsize_bits;
+ lrng_pool_set_entropy(ent_count_bits);
+ return 0;
+ case RNDADDENTROPY:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (get_user(ent_count_bits, p++))
+ return -EFAULT;
+ if (ent_count_bits < 0)
+ return -EINVAL;
+ if (get_user(size, p++))
+ return -EFAULT;
+ if (size < 0)
+ return -EINVAL;
+ /* there cannot be more entropy than data */
+ ent_count_bits = min(ent_count_bits, size<<3);
+ return lrng_drng_write_common((const char __user *)p, size,
+ ent_count_bits);
+ case RNDZAPENTCNT:
+ case RNDCLEARPOOL:
+ /* Clear the entropy pool counter. */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ lrng_pool_set_entropy(0);
+ return 0;
+ case RNDRESEEDCRNG:
+ /*
+ * We leave the capability check here since it is present
+ * in the upstream's RNG implementation. Yet, user space
+ * can trigger a reseed as easy as writing into /dev/random
+ * or /dev/urandom where no privilege is needed.
+ */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ /* Force a reseed of all DRNGs */
+ lrng_drng_force_reseed();
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int lrng_fasync(int fd, struct file *filp, int on)
+{
+ return fasync_helper(fd, filp, on, &fasync);
+}
+
+const struct file_operations random_fops = {
+ .read = lrng_drng_read_block,
+ .write = lrng_drng_write,
+ .poll = lrng_random_poll,
+ .unlocked_ioctl = lrng_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+ .fasync = lrng_fasync,
+ .llseek = noop_llseek,
+};
+
+const struct file_operations urandom_fops = {
+ .read = lrng_drng_read,
+ .write = lrng_drng_write,
+ .unlocked_ioctl = lrng_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+ .fasync = lrng_fasync,
+ .llseek = noop_llseek,
+};
+
+SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
+ unsigned int, flags)
+{
+ if (flags & ~(GRND_NONBLOCK|GRND_RANDOM|GRND_INSECURE))
+ return -EINVAL;
+
+ /*
+ * Requesting insecure and blocking randomness at the same time makes
+ * no sense.
+ */
+ if ((flags &
+ (GRND_INSECURE|GRND_RANDOM)) == (GRND_INSECURE|GRND_RANDOM))
+ return -EINVAL;
+
+ if (count > INT_MAX)
+ count = INT_MAX;
+
+ if (flags & GRND_INSECURE)
+ return lrng_drng_read(NULL, buf, count, NULL);
+
+ return lrng_read_common_block(flags & GRND_NONBLOCK, buf, count);
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_internal.h linux-5.15-lrng/drivers/char/lrng/lrng_internal.h
--- linux-5.15/drivers/char/lrng/lrng_internal.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_internal.h 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,485 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * Copyright (C) 2018 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#ifndef _LRNG_INTERNAL_H
+#define _LRNG_INTERNAL_H
+
+#include <crypto/sha1.h>
+#include <crypto/sha2.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/rwlock.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+/*************************** General LRNG parameter ***************************/
+
+/* Security strength of LRNG -- this must match DRNG security strength */
+#define LRNG_DRNG_SECURITY_STRENGTH_BYTES 32
+#define LRNG_DRNG_SECURITY_STRENGTH_BITS (LRNG_DRNG_SECURITY_STRENGTH_BYTES * 8)
+#define LRNG_DRNG_BLOCKSIZE 64 /* Maximum of DRNG block sizes */
+#define LRNG_DRNG_INIT_SEED_SIZE_BITS (LRNG_DRNG_SECURITY_STRENGTH_BITS + \
+ CONFIG_LRNG_SEED_BUFFER_INIT_ADD_BITS)
+#define LRNG_DRNG_INIT_SEED_SIZE_BYTES (LRNG_DRNG_INIT_SEED_SIZE_BITS >> 3)
+
+/*
+ * SP800-90A defines a maximum request size of 1<<16 bytes. The given value is
+ * considered a safer margin.
+ *
+ * This value is allowed to be changed.
+ */
+#define LRNG_DRNG_MAX_REQSIZE (1<<12)
+
+/*
+ * SP800-90A defines a maximum number of requests between reseeds of 2^48.
+ * The given value is considered a much safer margin, balancing requests for
+ * frequent reseeds with the need to conserve entropy. This value MUST NOT be
+ * larger than INT_MAX because it is used in an atomic_t.
+ *
+ * This value is allowed to be changed.
+ */
+#define LRNG_DRNG_RESEED_THRESH (1<<20)
+
+/*
+ * Maximum DRNG generation operations without reseed having full entropy
+ * This value defines the absolute maximum value of DRNG generation operations
+ * without a reseed holding full entropy. LRNG_DRNG_RESEED_THRESH is the
+ * threshold when a new reseed is attempted. But it is possible that this fails
+ * to deliver full entropy. In this case the DRNG will continue to provide data
+ * even though it was not reseeded with full entropy. To avoid in the extreme
+ * case that no reseed is performed for too long, this threshold is enforced.
+ * If that absolute low value is reached, the LRNG is marked as not operational.
+ *
+ * This value is allowed to be changed.
+ */
+#define LRNG_DRNG_MAX_WITHOUT_RESEED (1<<30)
+
+/*
+ * Min required seed entropy is 128 bits covering the minimum entropy
+ * requirement of SP800-131A and the German BSI's TR02102.
+ *
+ * This value is allowed to be changed.
+ */
+#define LRNG_FULL_SEED_ENTROPY_BITS LRNG_DRNG_SECURITY_STRENGTH_BITS
+#define LRNG_MIN_SEED_ENTROPY_BITS 128
+#define LRNG_INIT_ENTROPY_BITS 32
+
+/*
+ * Wakeup value
+ *
+ * This value is allowed to be changed but must not be larger than the
+ * digest size of the hash operation used update the aux_pool.
+ */
+#ifdef CONFIG_CRYPTO_LIB_SHA256
+# define LRNG_ATOMIC_DIGEST_SIZE SHA256_DIGEST_SIZE
+#else
+# define LRNG_ATOMIC_DIGEST_SIZE SHA1_DIGEST_SIZE
+#endif
+#define LRNG_WRITE_WAKEUP_ENTROPY LRNG_ATOMIC_DIGEST_SIZE
+
+/*
+ * If the switching support is configured, we must provide support up to
+ * the largest digest size. Without switching support, we know it is only
+ * the built-in digest size.
+ */
+#ifdef CONFIG_LRNG_DRNG_SWITCH
+# define LRNG_MAX_DIGESTSIZE 64
+#else
+# define LRNG_MAX_DIGESTSIZE LRNG_ATOMIC_DIGEST_SIZE
+#endif
+
+/*
+ * Oversampling factor of IRQ events to obtain
+ * LRNG_DRNG_SECURITY_STRENGTH_BYTES. This factor is used when a
+ * high-resolution time stamp is not available. In this case, jiffies and
+ * register contents are used to fill the entropy pool. These noise sources
+ * are much less entropic than the high-resolution timer. The entropy content
+ * is the entropy content assumed with LRNG_IRQ_ENTROPY_BITS divided by
+ * LRNG_IRQ_OVERSAMPLING_FACTOR.
+ *
+ * This value is allowed to be changed.
+ */
+#define LRNG_IRQ_OVERSAMPLING_FACTOR 10
+
+/* Alignmask that is intended to be identical to CRYPTO_MINALIGN */
+#define LRNG_KCAPI_ALIGN ARCH_KMALLOC_MINALIGN
+
+/*
+ * This definition must provide a buffer that is equal to SHASH_DESC_ON_STACK
+ * as it will be casted into a struct shash_desc.
+ */
+#define LRNG_POOL_SIZE (sizeof(struct shash_desc) + HASH_MAX_DESCSIZE)
+
+/************************ Default DRNG implementation *************************/
+
+extern struct chacha20_state chacha20;
+extern const struct lrng_crypto_cb lrng_cc20_crypto_cb;
+void lrng_cc20_init_state(struct chacha20_state *state);
+
+/********************************** /proc *************************************/
+
+#ifdef CONFIG_SYSCTL
+void lrng_pool_inc_numa_node(void);
+void lrng_proc_update_max_write_thresh(u32 new_digestsize);
+#else
+static inline void lrng_pool_inc_numa_node(void) { }
+static inline void lrng_proc_update_max_write_thresh(u32 new_digestsize) { }
+#endif
+
+/****************************** LRNG interfaces *******************************/
+
+extern u32 lrng_write_wakeup_bits;
+extern int lrng_drng_reseed_max_time;
+
+void lrng_writer_wakeup(void);
+void lrng_init_wakeup(void);
+void lrng_debug_report_seedlevel(const char *name);
+void lrng_process_ready_list(void);
+
+/* External interface to use of the switchable DRBG inside the kernel */
+void get_random_bytes_full(void *buf, int nbytes);
+
+/************************* Jitter RNG Entropy Source **************************/
+
+#ifdef CONFIG_LRNG_JENT
+u32 lrng_get_jent(u8 *outbuf, u32 requested_bits);
+u32 lrng_jent_entropylevel(u32 requested_bits);
+void lrng_jent_es_state(unsigned char *buf, size_t buflen);
+#else /* CONFIG_LRNG_JENT */
+static inline u32 lrng_get_jent(u8 *outbuf, u32 requested_bits) { return 0; }
+static inline u32 lrng_jent_entropylevel(u32 requested_bits) { return 0; }
+static inline void lrng_jent_es_state(unsigned char *buf, size_t buflen) { }
+#endif /* CONFIG_LRNG_JENT */
+
+/************************** CPU-based Entropy Source **************************/
+
+static inline u32 lrng_fast_noise_entropylevel(u32 ent_bits, u32 requested_bits)
+{
+ /* Obtain entropy statement */
+ ent_bits = ent_bits * requested_bits / LRNG_DRNG_SECURITY_STRENGTH_BITS;
+ /* Cap entropy to buffer size in bits */
+ ent_bits = min_t(u32, ent_bits, requested_bits);
+ return ent_bits;
+}
+
+#ifdef CONFIG_LRNG_CPU
+u32 lrng_get_arch(u8 *outbuf, u32 requested_bits);
+u32 lrng_archrandom_entropylevel(u32 requested_bits);
+void lrng_arch_es_state(unsigned char *buf, size_t buflen);
+#else /* CONFIG_LRNG_CPU */
+static inline u32 lrng_get_arch(u8 *outbuf, u32 requested_bits) { return 0; }
+static inline u32 lrng_archrandom_entropylevel(u32 requested_bits) { return 0; }
+static inline void lrng_arch_es_state(unsigned char *buf, size_t buflen) { }
+#endif /* CONFIG_LRNG_CPU */
+
+/************************** Interrupt Entropy Source **************************/
+
+#ifdef CONFIG_LRNG_IRQ
+void lrng_pcpu_reset(void);
+u32 lrng_pcpu_avail_pool_size(void);
+u32 lrng_pcpu_avail_entropy(void);
+int lrng_pcpu_switch_hash(int node,
+ const struct lrng_crypto_cb *new_cb, void *new_hash,
+ const struct lrng_crypto_cb *old_cb);
+u32 lrng_pcpu_pool_hash(u8 *outbuf, u32 requested_bits, bool fully_seeded);
+void lrng_pcpu_array_add_u32(u32 data);
+u32 lrng_gcd_analyze(u32 *history, size_t nelem);
+void lrng_irq_es_state(unsigned char *buf, size_t buflen);
+#else /* CONFIG_LRNG_IRQ */
+static inline void lrng_pcpu_reset(void) { }
+static inline u32 lrng_pcpu_avail_pool_size(void) { return 0; }
+static inline u32 lrng_pcpu_avail_entropy(void) { return 0; }
+static inline int lrng_pcpu_switch_hash(int node,
+ const struct lrng_crypto_cb *new_cb, void *new_hash,
+ const struct lrng_crypto_cb *old_cb)
+{
+ return 0;
+}
+static inline u32 lrng_pcpu_pool_hash(u8 *outbuf, u32 requested_bits,
+ bool fully_seeded)
+{
+ return 0;
+}
+static inline void lrng_pcpu_array_add_u32(u32 data) { }
+static inline void lrng_irq_es_state(unsigned char *buf, size_t buflen) { }
+#endif /* CONFIG_LRNG_IRQ */
+
+/****************************** DRNG processing *******************************/
+
+/* DRNG state handle */
+struct lrng_drng {
+ void *drng; /* DRNG handle */
+ void *hash; /* Hash handle */
+ const struct lrng_crypto_cb *crypto_cb; /* Crypto callbacks */
+ atomic_t requests; /* Number of DRNG requests */
+ atomic_t requests_since_fully_seeded; /* Number DRNG requests since
+ last fully seeded */
+ unsigned long last_seeded; /* Last time it was seeded */
+ bool fully_seeded; /* Is DRNG fully seeded? */
+ bool force_reseed; /* Force a reseed */
+
+ /* Lock write operations on DRNG state, DRNG replacement of crypto_cb */
+ struct mutex lock;
+ spinlock_t spin_lock;
+ /* Lock *hash replacement - always take before DRNG lock */
+ rwlock_t hash_lock;
+};
+
+extern struct mutex lrng_crypto_cb_update;
+
+struct lrng_drng *lrng_drng_init_instance(void);
+struct lrng_drng *lrng_drng_atomic_instance(void);
+
+static __always_inline bool lrng_drng_is_atomic(struct lrng_drng *drng)
+{
+ return (drng->drng == lrng_drng_atomic_instance()->drng);
+}
+
+/* Lock the DRNG */
+static __always_inline void lrng_drng_lock(struct lrng_drng *drng,
+ unsigned long *flags)
+ __acquires(&drng->spin_lock)
+{
+ /* Use spin lock in case the atomic DRNG context is used */
+ if (lrng_drng_is_atomic(drng)) {
+ spin_lock_irqsave(&drng->spin_lock, *flags);
+
+ /*
+ * In case a lock transition happened while we were spinning,
+ * catch this case and use the new lock type.
+ */
+ if (!lrng_drng_is_atomic(drng)) {
+ spin_unlock_irqrestore(&drng->spin_lock, *flags);
+ __acquire(&drng->spin_lock);
+ mutex_lock(&drng->lock);
+ }
+ } else {
+ __acquire(&drng->spin_lock);
+ mutex_lock(&drng->lock);
+ }
+}
+
+/* Unlock the DRNG */
+static __always_inline void lrng_drng_unlock(struct lrng_drng *drng,
+ unsigned long *flags)
+ __releases(&drng->spin_lock)
+{
+ if (lrng_drng_is_atomic(drng)) {
+ spin_unlock_irqrestore(&drng->spin_lock, *flags);
+ } else {
+ mutex_unlock(&drng->lock);
+ __release(&drng->spin_lock);
+ }
+}
+
+void lrng_reset(void);
+void lrng_drngs_init_cc20(bool force_seed);
+bool lrng_sp80090c_compliant(void);
+
+static inline u32 lrng_compress_osr(void)
+{
+ return lrng_sp80090c_compliant() ? CONFIG_LRNG_OVERSAMPLE_ES_BITS : 0;
+}
+
+static inline u32 lrng_reduce_by_osr(u32 entropy_bits)
+{
+ u32 osr_bits = lrng_compress_osr();
+ return (entropy_bits >= osr_bits) ? (entropy_bits - osr_bits) : 0;
+}
+
+bool lrng_get_available(void);
+void lrng_set_available(void);
+void lrng_drng_reset(struct lrng_drng *drng);
+int lrng_drng_get_atomic(u8 *outbuf, u32 outbuflen);
+int lrng_drng_get_sleep(u8 *outbuf, u32 outbuflen);
+void lrng_drng_force_reseed(void);
+void lrng_drng_seed_work(struct work_struct *dummy);
+
+#ifdef CONFIG_NUMA
+struct lrng_drng **lrng_drng_instances(void);
+void lrng_drngs_numa_alloc(void);
+#else /* CONFIG_NUMA */
+static inline struct lrng_drng **lrng_drng_instances(void) { return NULL; }
+static inline void lrng_drngs_numa_alloc(void) { return; }
+#endif /* CONFIG_NUMA */
+
+/************************* Entropy sources management *************************/
+
+enum lrng_external_noise_source {
+ lrng_noise_source_hw,
+ lrng_noise_source_user
+};
+
+void lrng_set_entropy_thresh(u32 new);
+u32 lrng_avail_entropy(void);
+void lrng_reset_state(void);
+
+bool lrng_state_exseed_allow(enum lrng_external_noise_source source);
+void lrng_state_exseed_set(enum lrng_external_noise_source source, bool type);
+bool lrng_state_min_seeded(void);
+bool lrng_state_fully_seeded(void);
+bool lrng_state_operational(void);
+
+int lrng_pool_trylock(void);
+void lrng_pool_unlock(void);
+void lrng_pool_all_numa_nodes_seeded(bool set);
+void lrng_pool_add_entropy(void);
+
+struct entropy_buf {
+ u8 a[LRNG_DRNG_INIT_SEED_SIZE_BYTES];
+ u8 b[LRNG_DRNG_INIT_SEED_SIZE_BYTES];
+ u8 c[LRNG_DRNG_INIT_SEED_SIZE_BYTES];
+ u8 d[LRNG_DRNG_INIT_SEED_SIZE_BYTES];
+ u32 now, a_bits, b_bits, c_bits, d_bits;
+};
+
+bool lrng_fully_seeded(bool fully_seeded, struct entropy_buf *eb);
+void lrng_unset_fully_seeded(struct lrng_drng *drng);
+void lrng_fill_seed_buffer(struct entropy_buf *entropy_buf, u32 requested_bits);
+void lrng_init_ops(struct entropy_buf *eb);
+
+/*********************** Auxiliary Pool Entropy Source ************************/
+
+u32 lrng_avail_aux_entropy(void);
+void lrng_aux_es_state(unsigned char *buf, size_t buflen);
+u32 lrng_get_digestsize(void);
+void lrng_pool_set_entropy(u32 entropy_bits);
+int lrng_aux_switch_hash(const struct lrng_crypto_cb *new_cb, void *new_hash,
+ const struct lrng_crypto_cb *old_cb);
+int lrng_pool_insert_aux(const u8 *inbuf, u32 inbuflen, u32 entropy_bits);
+void lrng_get_backtrack_aux(struct entropy_buf *entropy_buf,
+ u32 requested_bits);
+
+/* Obtain the security strength of the LRNG in bits */
+static inline u32 lrng_security_strength(void)
+{
+ /*
+ * We use a hash to read the entropy in the entropy pool. According to
+ * SP800-90B table 1, the entropy can be at most the digest size.
+ * Considering this together with the last sentence in section 3.1.5.1.2
+ * the security strength of a (approved) hash is equal to its output
+ * size. On the other hand the entropy cannot be larger than the
+ * security strength of the used DRBG.
+ */
+ return min_t(u32, LRNG_FULL_SEED_ENTROPY_BITS, lrng_get_digestsize());
+}
+
+static inline u32 lrng_get_seed_entropy_osr(bool fully_seeded)
+{
+ u32 requested_bits = lrng_security_strength();
+
+ /* Apply oversampling during initialization according to SP800-90C */
+ if (lrng_sp80090c_compliant() && !fully_seeded)
+ requested_bits += CONFIG_LRNG_SEED_BUFFER_INIT_ADD_BITS;
+ return requested_bits;
+}
+
+/************************** Health Test linking code **************************/
+
+enum lrng_health_res {
+ lrng_health_pass, /* Health test passes on time stamp */
+ lrng_health_fail_use, /* Time stamp unhealthy, but mix in */
+ lrng_health_fail_drop /* Time stamp unhealthy, drop it */
+};
+
+#ifdef CONFIG_LRNG_HEALTH_TESTS
+bool lrng_sp80090b_startup_complete(void);
+bool lrng_sp80090b_compliant(void);
+
+enum lrng_health_res lrng_health_test(u32 now_time);
+void lrng_health_disable(void);
+
+#else /* CONFIG_LRNG_HEALTH_TESTS */
+static inline bool lrng_sp80090b_startup_complete(void) { return true; }
+static inline bool lrng_sp80090b_compliant(void) { return false; }
+
+static inline enum lrng_health_res
+lrng_health_test(u32 now_time) { return lrng_health_pass; }
+static inline void lrng_health_disable(void) { }
+#endif /* CONFIG_LRNG_HEALTH_TESTS */
+
+/****************************** Helper code ***********************************/
+
+static inline u32 atomic_read_u32(atomic_t *v)
+{
+ return (u32)atomic_read(v);
+}
+
+/******************** Crypto Primitive Switching Support **********************/
+
+#ifdef CONFIG_LRNG_DRNG_SWITCH
+static inline void lrng_hash_lock(struct lrng_drng *drng, unsigned long *flags)
+{
+ read_lock_irqsave(&drng->hash_lock, *flags);
+}
+
+static inline void lrng_hash_unlock(struct lrng_drng *drng, unsigned long flags)
+{
+ read_unlock_irqrestore(&drng->hash_lock, flags);
+}
+#else /* CONFIG_LRNG_DRNG_SWITCH */
+static inline void lrng_hash_lock(struct lrng_drng *drng, unsigned long *flags)
+{ }
+
+static inline void lrng_hash_unlock(struct lrng_drng *drng, unsigned long flags)
+{ }
+#endif /* CONFIG_LRNG_DRNG_SWITCH */
+
+/*************************** Auxiliary functions ******************************/
+
+void invalidate_batched_entropy(void);
+
+/***************************** Testing code ***********************************/
+
+#ifdef CONFIG_LRNG_RAW_HIRES_ENTROPY
+bool lrng_raw_hires_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_HIRES_ENTROPY */
+static inline bool lrng_raw_hires_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_HIRES_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_JIFFIES_ENTROPY
+bool lrng_raw_jiffies_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_JIFFIES_ENTROPY */
+static inline bool lrng_raw_jiffies_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_JIFFIES_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_IRQ_ENTROPY
+bool lrng_raw_irq_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_IRQ_ENTROPY */
+static inline bool lrng_raw_irq_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_IRQ_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY
+bool lrng_raw_irqflags_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY */
+static inline bool lrng_raw_irqflags_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_RETIP_ENTROPY
+bool lrng_raw_retip_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_RETIP_ENTROPY */
+static inline bool lrng_raw_retip_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_RETIP_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_REGS_ENTROPY
+bool lrng_raw_regs_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_REGS_ENTROPY */
+static inline bool lrng_raw_regs_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_REGS_ENTROPY */
+
+#ifdef CONFIG_LRNG_RAW_ARRAY
+bool lrng_raw_array_entropy_store(u32 value);
+#else /* CONFIG_LRNG_RAW_ARRAY */
+static inline bool lrng_raw_array_entropy_store(u32 value) { return false; }
+#endif /* CONFIG_LRNG_RAW_ARRAY */
+
+#ifdef CONFIG_LRNG_IRQ_PERF
+bool lrng_perf_time(u32 start);
+#else /* CONFIG_LRNG_IRQ_PERF */
+static inline bool lrng_perf_time(u32 start) { return false; }
+#endif /*CONFIG_LRNG_IRQ_PERF */
+
+#endif /* _LRNG_INTERNAL_H */
diff -urN linux-5.15/drivers/char/lrng/lrng_kcapi.c linux-5.15-lrng/drivers/char/lrng/lrng_kcapi.c
--- linux-5.15/drivers/char/lrng/lrng_kcapi.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_kcapi.c 2021-11-29 12:37:45.153278971 +1100
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Backend for the LRNG providing the cryptographic primitives using the
+ * kernel crypto API.
+ *
+ * Copyright (C) 2018 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/hash.h>
+#include <crypto/rng.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/lrng.h>
+
+#include "lrng_kcapi_hash.h"
+
+static char *drng_name = NULL;
+module_param(drng_name, charp, 0444);
+MODULE_PARM_DESC(drng_name, "Kernel crypto API name of DRNG");
+
+static char *pool_hash = "sha512";
+module_param(pool_hash, charp, 0444);
+MODULE_PARM_DESC(pool_hash,
+ "Kernel crypto API name of hash or keyed message digest to read the entropy pool");
+
+static char *seed_hash = NULL;
+module_param(seed_hash, charp, 0444);
+MODULE_PARM_DESC(seed_hash,
+ "Kernel crypto API name of hash with output size equal to seedsize of DRNG to bring seed string to the size required by the DRNG");
+
+struct lrng_drng_info {
+ struct crypto_rng *kcapi_rng;
+ void *lrng_hash;
+};
+
+static void *lrng_kcapi_drng_hash_alloc(void)
+{
+ return lrng_kcapi_hash_alloc(pool_hash);
+}
+
+static int lrng_kcapi_drng_seed_helper(void *drng, const u8 *inbuf,
+ u32 inbuflen)
+{
+ SHASH_DESC_ON_STACK(shash, NULL);
+ struct lrng_drng_info *lrng_drng_info = (struct lrng_drng_info *)drng;
+ struct crypto_rng *kcapi_rng = lrng_drng_info->kcapi_rng;
+ void *hash = lrng_drng_info->lrng_hash;
+ u32 digestsize = lrng_kcapi_hash_digestsize(hash);
+ u8 digest[64] __aligned(8);
+ int ret;
+
+ if (!hash)
+ return crypto_rng_reset(kcapi_rng, inbuf, inbuflen);
+
+ BUG_ON(digestsize > sizeof(digest));
+
+ ret = lrng_kcapi_hash_init(shash, hash) ?:
+ lrng_kcapi_hash_update(shash, inbuf, inbuflen) ?:
+ lrng_kcapi_hash_final(shash, digest);
+ lrng_kcapi_hash_zero(shash);
+ if (ret)
+ return ret;
+
+ ret = crypto_rng_reset(kcapi_rng, digest, digestsize);
+ if (ret)
+ return ret;
+
+ memzero_explicit(digest, digestsize);
+ return 0;
+}
+
+static int lrng_kcapi_drng_generate_helper(void *drng, u8 *outbuf,
+ u32 outbuflen)
+{
+ struct lrng_drng_info *lrng_drng_info = (struct lrng_drng_info *)drng;
+ struct crypto_rng *kcapi_rng = lrng_drng_info->kcapi_rng;
+ int ret = crypto_rng_get_bytes(kcapi_rng, outbuf, outbuflen);
+
+ if (ret < 0)
+ return ret;
+
+ return outbuflen;
+}
+
+static void *lrng_kcapi_drng_alloc(u32 sec_strength)
+{
+ struct lrng_drng_info *lrng_drng_info;
+ struct crypto_rng *kcapi_rng;
+ int seedsize;
+ void *ret = ERR_PTR(-ENOMEM);
+
+ if (!drng_name) {
+ pr_err("DRNG name missing\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!memcmp(drng_name, "drbg", 4) ||
+ !memcmp(drng_name, "stdrng", 6) ||
+ !memcmp(drng_name, "jitterentropy_rng", 17)) {
+ pr_err("Refusing to load the requested random number generator\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ lrng_drng_info = kmalloc(sizeof(*lrng_drng_info), GFP_KERNEL);
+ if (!lrng_drng_info)
+ return ERR_PTR(-ENOMEM);
+
+ kcapi_rng = crypto_alloc_rng(drng_name, 0, 0);
+ if (IS_ERR(kcapi_rng)) {
+ pr_err("DRNG %s cannot be allocated\n", drng_name);
+ ret = ERR_CAST(kcapi_rng);
+ goto free;
+ }
+ lrng_drng_info->kcapi_rng = kcapi_rng;
+
+ seedsize = crypto_rng_seedsize(kcapi_rng);
+
+ if (sec_strength > seedsize)
+ pr_info("Seedsize DRNG (%u bits) lower than security strength of LRNG noise source (%u bits)\n",
+ crypto_rng_seedsize(kcapi_rng) * 8, sec_strength * 8);
+
+ if (seedsize) {
+ void *lrng_hash;
+
+ if (!seed_hash) {
+ switch (seedsize) {
+ case 32:
+ seed_hash = "sha256";
+ break;
+ case 48:
+ seed_hash = "sha384";
+ break;
+ case 64:
+ seed_hash = "sha512";
+ break;
+ default:
+ pr_err("Seed size %d cannot be processed\n",
+ seedsize);
+ goto dealloc;
+ }
+ }
+
+ lrng_hash = lrng_kcapi_hash_alloc(seed_hash);
+ if (IS_ERR(lrng_hash)) {
+ ret = ERR_CAST(lrng_hash);
+ goto dealloc;
+ }
+
+ if (seedsize != lrng_kcapi_hash_digestsize(lrng_hash)) {
+ pr_err("Seed hash output size not equal to DRNG seed size\n");
+ lrng_kcapi_hash_dealloc(lrng_hash);
+ ret = ERR_PTR(-EINVAL);
+ goto dealloc;
+ }
+
+ lrng_drng_info->lrng_hash = lrng_hash;
+
+ pr_info("Seed hash %s allocated\n", seed_hash);
+ } else {
+ lrng_drng_info->lrng_hash = NULL;
+ }
+
+ pr_info("Kernel crypto API DRNG %s allocated\n", drng_name);
+
+ return lrng_drng_info;
+
+dealloc:
+ crypto_free_rng(kcapi_rng);
+free:
+ kfree(lrng_drng_info);
+ return ret;
+}
+
+static void lrng_kcapi_drng_dealloc(void *drng)
+{
+ struct lrng_drng_info *lrng_drng_info = (struct lrng_drng_info *)drng;
+ struct crypto_rng *kcapi_rng = lrng_drng_info->kcapi_rng;
+
+ crypto_free_rng(kcapi_rng);
+ if (lrng_drng_info->lrng_hash)
+ lrng_kcapi_hash_dealloc(lrng_drng_info->lrng_hash);
+ kfree(lrng_drng_info);
+ pr_info("DRNG %s deallocated\n", drng_name);
+}
+
+static const char *lrng_kcapi_drng_name(void)
+{
+ return drng_name;
+}
+
+static const char *lrng_kcapi_pool_hash(void)
+{
+ return pool_hash;
+}
+
+static const struct lrng_crypto_cb lrng_kcapi_crypto_cb = {
+ .lrng_drng_name = lrng_kcapi_drng_name,
+ .lrng_hash_name = lrng_kcapi_pool_hash,
+ .lrng_drng_alloc = lrng_kcapi_drng_alloc,
+ .lrng_drng_dealloc = lrng_kcapi_drng_dealloc,
+ .lrng_drng_seed_helper = lrng_kcapi_drng_seed_helper,
+ .lrng_drng_generate_helper = lrng_kcapi_drng_generate_helper,
+ .lrng_hash_alloc = lrng_kcapi_drng_hash_alloc,
+ .lrng_hash_dealloc = lrng_kcapi_hash_dealloc,
+ .lrng_hash_digestsize = lrng_kcapi_hash_digestsize,
+ .lrng_hash_init = lrng_kcapi_hash_init,
+ .lrng_hash_update = lrng_kcapi_hash_update,
+ .lrng_hash_final = lrng_kcapi_hash_final,
+ .lrng_hash_desc_zero = lrng_kcapi_hash_zero,
+};
+
+static int __init lrng_kcapi_init(void)
+{
+ return lrng_set_drng_cb(&lrng_kcapi_crypto_cb);
+}
+static void __exit lrng_kcapi_exit(void)
+{
+ lrng_set_drng_cb(NULL);
+}
+
+late_initcall(lrng_kcapi_init);
+module_exit(lrng_kcapi_exit);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
+MODULE_DESCRIPTION("Linux Random Number Generator - kernel crypto API DRNG backend");
diff -urN linux-5.15/drivers/char/lrng/lrng_kcapi_hash.c linux-5.15-lrng/drivers/char/lrng/lrng_kcapi_hash.c
--- linux-5.15/drivers/char/lrng/lrng_kcapi_hash.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_kcapi_hash.c 2021-11-29 12:37:24.863279049 +1100
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Backend for providing the hash primitive using the kernel crypto API.
+ *
+ * Copyright (C) 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <crypto/hash.h>
+
+#include "lrng_kcapi_hash.h"
+
+struct lrng_hash_info {
+ struct crypto_shash *tfm;
+};
+
+static inline void _lrng_kcapi_hash_free(struct lrng_hash_info *lrng_hash)
+{
+ struct crypto_shash *tfm = lrng_hash->tfm;
+
+ crypto_free_shash(tfm);
+ kfree(lrng_hash);
+}
+
+void *lrng_kcapi_hash_alloc(const char *name)
+{
+ struct lrng_hash_info *lrng_hash;
+ struct crypto_shash *tfm;
+ int ret;
+
+ if (!name) {
+ pr_err("Hash name missing\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ tfm = crypto_alloc_shash(name, 0, 0);
+ if (IS_ERR(tfm)) {
+ pr_err("could not allocate hash %s\n", name);
+ return ERR_CAST(tfm);
+ }
+
+ ret = sizeof(struct lrng_hash_info);
+ lrng_hash = kmalloc(ret, GFP_KERNEL);
+ if (!lrng_hash) {
+ crypto_free_shash(tfm);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ lrng_hash->tfm = tfm;
+
+ pr_info("Hash %s allocated\n", name);
+
+ return lrng_hash;
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_alloc);
+
+u32 lrng_kcapi_hash_digestsize(void *hash)
+{
+ struct lrng_hash_info *lrng_hash = (struct lrng_hash_info *)hash;
+ struct crypto_shash *tfm = lrng_hash->tfm;
+
+ return crypto_shash_digestsize(tfm);
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_digestsize);
+
+void lrng_kcapi_hash_dealloc(void *hash)
+{
+ struct lrng_hash_info *lrng_hash = (struct lrng_hash_info *)hash;
+
+ _lrng_kcapi_hash_free(lrng_hash);
+ pr_info("Hash deallocated\n");
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_dealloc);
+
+int lrng_kcapi_hash_init(struct shash_desc *shash, void *hash)
+{
+ struct lrng_hash_info *lrng_hash = (struct lrng_hash_info *)hash;
+ struct crypto_shash *tfm = lrng_hash->tfm;
+
+ shash->tfm = tfm;
+ return crypto_shash_init(shash);
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_init);
+
+int lrng_kcapi_hash_update(struct shash_desc *shash, const u8 *inbuf,
+ u32 inbuflen)
+{
+ return crypto_shash_update(shash, inbuf, inbuflen);
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_update);
+
+int lrng_kcapi_hash_final(struct shash_desc *shash, u8 *digest)
+{
+ return crypto_shash_final(shash, digest);
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_final);
+
+void lrng_kcapi_hash_zero(struct shash_desc *shash)
+{
+ shash_desc_zero(shash);
+}
+EXPORT_SYMBOL(lrng_kcapi_hash_zero);
diff -urN linux-5.15/drivers/char/lrng/lrng_kcapi_hash.h linux-5.15-lrng/drivers/char/lrng/lrng_kcapi_hash.h
--- linux-5.15/drivers/char/lrng/lrng_kcapi_hash.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_kcapi_hash.h 2021-11-29 12:37:24.863279049 +1100
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * Copyright (C) 2020 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#ifndef _LRNG_KCAPI_HASH_H
+#define _LRNG_KCAPI_HASH_H
+
+#include <linux/module.h>
+
+void *lrng_kcapi_hash_alloc(const char *name);
+u32 lrng_kcapi_hash_digestsize(void *hash);
+void lrng_kcapi_hash_dealloc(void *hash);
+int lrng_kcapi_hash_init(struct shash_desc *shash, void *hash);
+int lrng_kcapi_hash_update(struct shash_desc *shash, const u8 *inbuf,
+ u32 inbuflen);
+int lrng_kcapi_hash_final(struct shash_desc *shash, u8 *digest);
+void lrng_kcapi_hash_zero(struct shash_desc *shash);
+
+#endif /* _LRNG_KCAPI_HASH_H */
diff -urN linux-5.15/drivers/char/lrng/lrng_numa.c linux-5.15-lrng/drivers/char/lrng/lrng_numa.c
--- linux-5.15/drivers/char/lrng/lrng_numa.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_numa.c 2021-11-29 12:37:08.753279110 +1100
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG NUMA support
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/lrng.h>
+#include <linux/slab.h>
+
+#include "lrng_internal.h"
+
+static struct lrng_drng **lrng_drng __read_mostly = NULL;
+
+struct lrng_drng **lrng_drng_instances(void)
+{
+ return smp_load_acquire(&lrng_drng);
+}
+
+/* Allocate the data structures for the per-NUMA node DRNGs */
+static void _lrng_drngs_numa_alloc(struct work_struct *work)
+{
+ struct lrng_drng **drngs;
+ struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+ u32 node;
+ bool init_drng_used = false;
+
+ mutex_lock(&lrng_crypto_cb_update);
+
+ /* per-NUMA-node DRNGs are already present */
+ if (lrng_drng)
+ goto unlock;
+
+ drngs = kcalloc(nr_node_ids, sizeof(void *), GFP_KERNEL|__GFP_NOFAIL);
+ for_each_online_node(node) {
+ struct lrng_drng *drng;
+
+ if (!init_drng_used) {
+ drngs[node] = lrng_drng_init;
+ init_drng_used = true;
+ continue;
+ }
+
+ drng = kmalloc_node(sizeof(struct lrng_drng),
+ GFP_KERNEL|__GFP_NOFAIL, node);
+ memset(drng, 0, sizeof(lrng_drng));
+
+ drng->crypto_cb = lrng_drng_init->crypto_cb;
+ drng->drng = drng->crypto_cb->lrng_drng_alloc(
+ LRNG_DRNG_SECURITY_STRENGTH_BYTES);
+ if (IS_ERR(drng->drng)) {
+ kfree(drng);
+ goto err;
+ }
+
+ drng->hash = drng->crypto_cb->lrng_hash_alloc();
+ if (IS_ERR(drng->hash)) {
+ drng->crypto_cb->lrng_drng_dealloc(drng->drng);
+ kfree(drng);
+ goto err;
+ }
+
+ mutex_init(&drng->lock);
+ spin_lock_init(&drng->spin_lock);
+ rwlock_init(&drng->hash_lock);
+
+ /*
+ * Switch the hash used by the per-CPU pool.
+ * We do not need to lock the new hash as it is not usable yet
+ * due to **drngs not yet being initialized.
+ */
+ if (lrng_pcpu_switch_hash(node, drng->crypto_cb, drng->hash,
+ &lrng_cc20_crypto_cb))
+ goto err;
+
+ /*
+ * No reseeding of NUMA DRNGs from previous DRNGs as this
+ * would complicate the code. Let it simply reseed.
+ */
+ lrng_drng_reset(drng);
+ drngs[node] = drng;
+
+ lrng_pool_inc_numa_node();
+ pr_info("DRNG and entropy pool read hash for NUMA node %d allocated\n",
+ node);
+ }
+
+ /* counterpart to smp_load_acquire in lrng_drng_instances */
+ if (!cmpxchg_release(&lrng_drng, NULL, drngs)) {
+ lrng_pool_all_numa_nodes_seeded(false);
+ goto unlock;
+ }
+
+err:
+ for_each_online_node(node) {
+ struct lrng_drng *drng = drngs[node];
+
+ if (drng == lrng_drng_init)
+ continue;
+
+ if (drng) {
+ lrng_pcpu_switch_hash(node, &lrng_cc20_crypto_cb, NULL,
+ drng->crypto_cb);
+ drng->crypto_cb->lrng_hash_dealloc(drng->hash);
+ drng->crypto_cb->lrng_drng_dealloc(drng->drng);
+ kfree(drng);
+ }
+ }
+ kfree(drngs);
+
+unlock:
+ mutex_unlock(&lrng_crypto_cb_update);
+}
+
+static DECLARE_WORK(lrng_drngs_numa_alloc_work, _lrng_drngs_numa_alloc);
+
+void lrng_drngs_numa_alloc(void)
+{
+ schedule_work(&lrng_drngs_numa_alloc_work);
+}
diff -urN linux-5.15/drivers/char/lrng/lrng_proc.c linux-5.15-lrng/drivers/char/lrng/lrng_proc.c
--- linux-5.15/drivers/char/lrng/lrng_proc.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_proc.c 2021-11-29 12:37:03.083279132 +1100
@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG proc and sysctl interfaces
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#include <linux/lrng.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/sysctl.h>
+#include <linux/uuid.h>
+
+#include "lrng_internal.h"
+
+/*
+ * This function is used to return both the bootid UUID, and random
+ * UUID. The difference is in whether table->data is NULL; if it is,
+ * then a new UUID is generated and returned to the user.
+ *
+ * If the user accesses this via the proc interface, the UUID will be
+ * returned as an ASCII string in the standard UUID format; if via the
+ * sysctl system call, as 16 bytes of binary data.
+ */
+static int lrng_proc_do_uuid(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct ctl_table fake_table;
+ unsigned char buf[64], tmp_uuid[16], *uuid;
+
+ uuid = table->data;
+ if (!uuid) {
+ uuid = tmp_uuid;
+ generate_random_uuid(uuid);
+ } else {
+ static DEFINE_SPINLOCK(bootid_spinlock);
+
+ spin_lock(&bootid_spinlock);
+ if (!uuid[8])
+ generate_random_uuid(uuid);
+ spin_unlock(&bootid_spinlock);
+ }
+
+ sprintf(buf, "%pU", uuid);
+
+ fake_table.data = buf;
+ fake_table.maxlen = sizeof(buf);
+
+ return proc_dostring(&fake_table, write, buffer, lenp, ppos);
+}
+
+static int lrng_proc_do_entropy(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct ctl_table fake_table;
+ int entropy_count;
+
+ entropy_count = lrng_avail_entropy();
+
+ fake_table.data = &entropy_count;
+ fake_table.maxlen = sizeof(entropy_count);
+
+ return proc_dointvec(&fake_table, write, buffer, lenp, ppos);
+}
+
+static int lrng_proc_do_poolsize(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct ctl_table fake_table;
+ int entropy_count;
+
+ /* LRNG can at most retain entropy in per-CPU pools and aux pool */
+ entropy_count = lrng_get_digestsize() + lrng_pcpu_avail_pool_size();
+
+ fake_table.data = &entropy_count;
+ fake_table.maxlen = sizeof(entropy_count);
+
+ return proc_dointvec(&fake_table, write, buffer, lenp, ppos);
+}
+
+static int lrng_min_write_thresh;
+static int lrng_max_write_thresh = (LRNG_WRITE_WAKEUP_ENTROPY << 3);
+static char lrng_sysctl_bootid[16];
+static int lrng_drng_reseed_max_min;
+
+void lrng_proc_update_max_write_thresh(u32 new_digestsize)
+{
+ lrng_max_write_thresh = (int)new_digestsize;
+ mb();
+}
+
+struct ctl_table random_table[] = {
+ {
+ .procname = "poolsize",
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = lrng_proc_do_poolsize,
+ },
+ {
+ .procname = "entropy_avail",
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = lrng_proc_do_entropy,
+ },
+ {
+ .procname = "write_wakeup_threshold",
+ .data = &lrng_write_wakeup_bits,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &lrng_min_write_thresh,
+ .extra2 = &lrng_max_write_thresh,
+ },
+ {
+ .procname = "boot_id",
+ .data = &lrng_sysctl_bootid,
+ .maxlen = 16,
+ .mode = 0444,
+ .proc_handler = lrng_proc_do_uuid,
+ },
+ {
+ .procname = "uuid",
+ .maxlen = 16,
+ .mode = 0444,
+ .proc_handler = lrng_proc_do_uuid,
+ },
+ {
+ .procname = "urandom_min_reseed_secs",
+ .data = &lrng_drng_reseed_max_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = &lrng_drng_reseed_max_min,
+ },
+ { }
+};
+
+/* Number of online DRNGs */
+static u32 numa_drngs = 1;
+
+void lrng_pool_inc_numa_node(void)
+{
+ numa_drngs++;
+}
+
+static int lrng_proc_type_show(struct seq_file *m, void *v)
+{
+ struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+ unsigned long flags = 0;
+ unsigned char buf[250], irq[200], aux[100], cpu[90], jent[45];
+
+ lrng_drng_lock(lrng_drng_init, &flags);
+ snprintf(buf, sizeof(buf),
+ "DRNG name: %s\n"
+ "LRNG security strength in bits: %d\n"
+ "number of DRNG instances: %u\n"
+ "Standards compliance: %s\n"
+ "Entropy Sources: %s%s%sAuxiliary\n"
+ "LRNG minimally seeded: %s\n"
+ "LRNG fully seeded: %s\n",
+ lrng_drng_init->crypto_cb->lrng_drng_name(),
+ lrng_security_strength(),
+ numa_drngs,
+ lrng_sp80090c_compliant() ? "SP800-90C " : "",
+ IS_ENABLED(CONFIG_LRNG_IRQ) ? "IRQ " : "",
+ IS_ENABLED(CONFIG_LRNG_JENT) ? "JitterRNG " : "",
+ IS_ENABLED(CONFIG_LRNG_CPU) ? "CPU " : "",
+ lrng_state_min_seeded() ? "true" : "false",
+ lrng_state_fully_seeded() ? "true" : "false");
+
+ lrng_aux_es_state(aux, sizeof(aux));
+
+ irq[0] = '\0';
+ lrng_irq_es_state(irq, sizeof(irq));
+
+ jent[0] = '\0';
+ lrng_jent_es_state(jent, sizeof(jent));
+
+ cpu[0] = '\0';
+ lrng_arch_es_state(cpu, sizeof(cpu));
+
+ lrng_drng_unlock(lrng_drng_init, &flags);
+
+ seq_write(m, buf, strlen(buf));
+ seq_write(m, aux, strlen(aux));
+ seq_write(m, irq, strlen(irq));
+ seq_write(m, jent, strlen(jent));
+ seq_write(m, cpu, strlen(cpu));
+
+ return 0;
+}
+
+static int __init lrng_proc_type_init(void)
+{
+ proc_create_single("lrng_type", 0444, NULL, &lrng_proc_type_show);
+ return 0;
+}
+
+module_init(lrng_proc_type_init);
diff -urN linux-5.15/drivers/char/lrng/lrng_selftest.c linux-5.15-lrng/drivers/char/lrng/lrng_selftest.c
--- linux-5.15/drivers/char/lrng/lrng_selftest.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_selftest.c 2021-11-29 12:38:26.603278813 +1100
@@ -0,0 +1,386 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG power-on and on-demand self-test
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+/*
+ * In addition to the self-tests below, the following LRNG components
+ * are covered with self-tests during regular operation:
+ *
+ * * power-on self-test: SP800-90A DRBG provided by the Linux kernel crypto API
+ * * power-on self-test: PRNG provided by the Linux kernel crypto API
+ * * runtime test: Raw noise source data testing including SP800-90B compliant
+ * tests when enabling CONFIG_LRNG_HEALTH_TESTS
+ *
+ * Additional developer tests present with LRNG code:
+ * * SP800-90B APT and RCT test enforcement validation when enabling
+ * CONFIG_LRNG_APT_BROKEN or CONFIG_LRNG_RCT_BROKEN.
+ * * Collection of raw entropy from the interrupt noise source when enabling
+ * CONFIG_LRNG_TESTING and pulling the data from the kernel with the provided
+ * interface.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/lrng.h>
+#include <linux/slab.h>
+
+#include "lrng_chacha20.h"
+#include "lrng_internal.h"
+
+#define LRNG_SELFTEST_PASSED 0
+#define LRNG_SEFLTEST_ERROR_TIME (1 << 0)
+#define LRNG_SEFLTEST_ERROR_CHACHA20 (1 << 1)
+#define LRNG_SEFLTEST_ERROR_HASH (1 << 2)
+#define LRNG_SEFLTEST_ERROR_GCD (1 << 3)
+#define LRNG_SELFTEST_NOT_EXECUTED 0xffffffff
+
+#ifdef CONFIG_LRNG_IRQ
+
+#include "lrng_es_irq.h"
+
+static u32 lrng_data_selftest_ptr = 0;
+static u32 lrng_data_selftest[LRNG_DATA_ARRAY_SIZE];
+
+static inline void lrng_data_process_selftest_insert(u32 time)
+{
+ u32 ptr = lrng_data_selftest_ptr++ & LRNG_DATA_WORD_MASK;
+ unsigned int array = lrng_data_idx2array(ptr);
+ unsigned int slot = lrng_data_idx2slot(ptr);
+
+ /* zeroization of slot to ensure the following OR adds the data */
+ lrng_data_selftest[array] &=
+ ~(lrng_data_slot_val(0xffffffff & LRNG_DATA_SLOTSIZE_MASK,
+ slot));
+ lrng_data_selftest[array] |=
+ lrng_data_slot_val(time & LRNG_DATA_SLOTSIZE_MASK, slot);
+}
+
+static inline void lrng_data_process_selftest_u32(u32 data)
+{
+ u32 pre_ptr, ptr, mask;
+ unsigned int pre_array;
+
+ /* Increment pointer by number of slots taken for input value */
+ lrng_data_selftest_ptr += LRNG_DATA_SLOTS_PER_UINT;
+
+ /* ptr to current unit */
+ ptr = lrng_data_selftest_ptr;
+
+ lrng_pcpu_split_u32(&ptr, &pre_ptr, &mask);
+
+ /* MSB of data go into previous unit */
+ pre_array = lrng_data_idx2array(pre_ptr);
+ /* zeroization of slot to ensure the following OR adds the data */
+ lrng_data_selftest[pre_array] &= ~(0xffffffff & ~mask);
+ lrng_data_selftest[pre_array] |= data & ~mask;
+
+ /* LSB of data go into current unit */
+ lrng_data_selftest[lrng_data_idx2array(ptr)] = data & mask;
+}
+
+static unsigned int lrng_data_process_selftest(void)
+{
+ u32 time;
+ u32 idx_zero_compare = (0 << 0) | (1 << 8) | (2 << 16) | (3 << 24);
+ u32 idx_one_compare = (4 << 0) | (5 << 8) | (6 << 16) | (7 << 24);
+ u32 idx_last_compare =
+ (((LRNG_DATA_NUM_VALUES - 4) & LRNG_DATA_SLOTSIZE_MASK) << 0) |
+ (((LRNG_DATA_NUM_VALUES - 3) & LRNG_DATA_SLOTSIZE_MASK) << 8) |
+ (((LRNG_DATA_NUM_VALUES - 2) & LRNG_DATA_SLOTSIZE_MASK) << 16) |
+ (((LRNG_DATA_NUM_VALUES - 1) & LRNG_DATA_SLOTSIZE_MASK) << 24);
+
+ (void)idx_one_compare;
+
+ /* "poison" the array to verify the operation of the zeroization */
+ lrng_data_selftest[0] = 0xffffffff;
+ lrng_data_selftest[1] = 0xffffffff;
+
+ lrng_data_process_selftest_insert(0);
+ /*
+ * Note, when using lrng_data_process_u32() on unaligned ptr,
+ * the first slots will go into next word, and the last slots go
+ * into the previous word.
+ */
+ lrng_data_process_selftest_u32((4 << 0) | (1 << 8) | (2 << 16) |
+ (3 << 24));
+ lrng_data_process_selftest_insert(5);
+ lrng_data_process_selftest_insert(6);
+ lrng_data_process_selftest_insert(7);
+
+ if ((lrng_data_selftest[0] != idx_zero_compare) ||
+ (lrng_data_selftest[1] != idx_one_compare))
+ goto err;
+
+ /* Reset for next test */
+ lrng_data_selftest[0] = 0;
+ lrng_data_selftest[1] = 0;
+ lrng_data_selftest_ptr = 0;
+
+ for (time = 0; time < LRNG_DATA_NUM_VALUES; time++)
+ lrng_data_process_selftest_insert(time);
+
+ if ((lrng_data_selftest[0] != idx_zero_compare) ||
+ (lrng_data_selftest[1] != idx_one_compare) ||
+ (lrng_data_selftest[LRNG_DATA_ARRAY_SIZE - 1] != idx_last_compare))
+ goto err;
+
+ return LRNG_SELFTEST_PASSED;
+
+err:
+ pr_err("LRNG data array self-test FAILED\n");
+ return LRNG_SEFLTEST_ERROR_TIME;
+}
+
+static unsigned int lrng_gcd_selftest(void)
+{
+ u32 history[10];
+ unsigned int i;
+
+#define LRNG_GCD_SELFTEST 3
+ for (i = 0; i < ARRAY_SIZE(history); i++)
+ history[i] = i * LRNG_GCD_SELFTEST;
+
+ if (lrng_gcd_analyze(history, ARRAY_SIZE(history)) == LRNG_GCD_SELFTEST)
+ return LRNG_SELFTEST_PASSED;
+
+ pr_err("LRNG GCD self-test FAILED\n");
+ return LRNG_SEFLTEST_ERROR_GCD;
+}
+
+#else /* CONFIG_LRNG_IRQ */
+
+static unsigned int lrng_data_process_selftest(void)
+{
+ return LRNG_SELFTEST_PASSED;
+}
+
+static unsigned int lrng_gcd_selftest(void)
+{
+ return LRNG_SELFTEST_PASSED;
+}
+
+#endif /* CONFIG_LRNG_IRQ */
+
+static inline void lrng_selftest_bswap32(u32 *ptr, u32 words)
+{
+ u32 i;
+
+ /* Byte-swap data which is an LE representation */
+ for (i = 0; i < words; i++) {
+ __le32 *p = (__le32 *)ptr;
+
+ *p = cpu_to_le32(*ptr);
+ ptr++;
+ }
+}
+
+/* The test vectors are taken from crypto/testmgr.h */
+static unsigned int lrng_hash_selftest(void)
+{
+ SHASH_DESC_ON_STACK(shash, NULL);
+ const struct lrng_crypto_cb *crypto_cb = &lrng_cc20_crypto_cb;
+ static const u8 lrng_hash_selftest_result[] =
+#ifdef CONFIG_CRYPTO_LIB_SHA256
+ { 0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea,
+ 0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23,
+ 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
+ 0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad };
+#else /* CONFIG_CRYPTO_LIB_SHA256 */
+ { 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a, 0xba, 0x3e,
+ 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c, 0x9c, 0xd0, 0xd8, 0x9d };
+#endif /* CONFIG_CRYPTO_LIB_SHA256 */
+ static const u8 hash_input[] = { 0x61, 0x62, 0x63 }; /* "abc" */
+ u8 digest[sizeof(lrng_hash_selftest_result)] __aligned(sizeof(u32));
+
+ BUG_ON(sizeof(digest) != crypto_cb->lrng_hash_digestsize(NULL));
+
+ if (!crypto_cb->lrng_hash_init(shash, NULL) &&
+ !crypto_cb->lrng_hash_update(shash, hash_input,
+ sizeof(hash_input)) &&
+ !crypto_cb->lrng_hash_final(shash, digest) &&
+ !memcmp(digest, lrng_hash_selftest_result, sizeof(digest)))
+ return 0;
+
+ pr_err("LRNG %s Hash self-test FAILED\n", crypto_cb->lrng_hash_name());
+ return LRNG_SEFLTEST_ERROR_HASH;
+}
+
+/*
+ * The test vectors were generated using the ChaCha20 DRNG from
+ * https://www.chronox.de/chacha20.html
+ */
+static unsigned int lrng_chacha20_drng_selftest(void)
+{
+ const struct lrng_crypto_cb *crypto_cb = &lrng_cc20_crypto_cb;
+ u8 seed[CHACHA_KEY_SIZE * 2] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+ };
+ struct chacha20_block chacha20;
+ int ret;
+ u8 outbuf[CHACHA_KEY_SIZE * 2] __aligned(sizeof(u32));
+
+ /*
+ * Expected result when ChaCha20 DRNG state is zero:
+ * * constants are set to "expand 32-byte k"
+ * * remaining state is 0
+ * and pulling one half ChaCha20 DRNG block.
+ */
+ static const u8 expected_halfblock[CHACHA_KEY_SIZE] = {
+ 0x76, 0xb8, 0xe0, 0xad, 0xa0, 0xf1, 0x3d, 0x90,
+ 0x40, 0x5d, 0x6a, 0xe5, 0x53, 0x86, 0xbd, 0x28,
+ 0xbd, 0xd2, 0x19, 0xb8, 0xa0, 0x8d, 0xed, 0x1a,
+ 0xa8, 0x36, 0xef, 0xcc, 0x8b, 0x77, 0x0d, 0xc7 };
+
+ /*
+ * Expected result when ChaCha20 DRNG state is zero:
+ * * constants are set to "expand 32-byte k"
+ * * remaining state is 0
+ * followed by a reseed with two keyblocks
+ * 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ * 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ * 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ * 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ * 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ * 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ * 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+ * 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f
+ * and pulling one ChaCha20 DRNG block.
+ */
+ static const u8 expected_oneblock[CHACHA_KEY_SIZE * 2] = {
+ 0xe3, 0xb0, 0x8a, 0xcc, 0x34, 0xc3, 0x17, 0x0e,
+ 0xc3, 0xd8, 0xc3, 0x40, 0xe7, 0x73, 0xe9, 0x0d,
+ 0xd1, 0x62, 0xa3, 0x5d, 0x7d, 0xf2, 0xf1, 0x4a,
+ 0x24, 0x42, 0xb7, 0x1e, 0xb0, 0x05, 0x17, 0x07,
+ 0xb9, 0x35, 0x10, 0x69, 0x8b, 0x46, 0xfb, 0x51,
+ 0xe9, 0x91, 0x3f, 0x46, 0xf2, 0x4d, 0xea, 0xd0,
+ 0x81, 0xc1, 0x1b, 0xa9, 0x5d, 0x52, 0x91, 0x5f,
+ 0xcd, 0xdc, 0xc6, 0xd6, 0xc3, 0x7c, 0x50, 0x23 };
+
+ /*
+ * Expected result when ChaCha20 DRNG state is zero:
+ * * constants are set to "expand 32-byte k"
+ * * remaining state is 0
+ * followed by a reseed with one key block plus one byte
+ * 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ * 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ * 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ * 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ * 0x20
+ * and pulling less than one ChaCha20 DRNG block.
+ */
+ static const u8 expected_block_nonalinged[CHACHA_KEY_SIZE + 4] = {
+ 0x9c, 0xfc, 0x5e, 0x31, 0x21, 0x62, 0x11, 0x85,
+ 0xd3, 0x77, 0xd3, 0x69, 0x0f, 0xa8, 0x16, 0x55,
+ 0xb4, 0x4c, 0xf6, 0x52, 0xf3, 0xa8, 0x37, 0x99,
+ 0x38, 0x76, 0xa0, 0x66, 0xec, 0xbb, 0xce, 0xa9,
+ 0x9c, 0x95, 0xa1, 0xfd };
+
+ BUILD_BUG_ON(sizeof(seed) % sizeof(u32));
+
+ memset(&chacha20, 0, sizeof(chacha20));
+ lrng_cc20_init_rfc7539(&chacha20);
+ lrng_selftest_bswap32((u32 *)seed, sizeof(seed) / sizeof(u32));
+
+ /* Generate with zero state */
+ ret = crypto_cb->lrng_drng_generate_helper(&chacha20, outbuf,
+ sizeof(expected_halfblock));
+ if (ret != sizeof(expected_halfblock))
+ goto err;
+ if (memcmp(outbuf, expected_halfblock, sizeof(expected_halfblock)))
+ goto err;
+
+ /* Clear state of DRNG */
+ memset(&chacha20.key.u[0], 0, 48);
+
+ /* Reseed with 2 key blocks */
+ ret = crypto_cb->lrng_drng_seed_helper(&chacha20, seed,
+ sizeof(expected_oneblock));
+ if (ret < 0)
+ goto err;
+ ret = crypto_cb->lrng_drng_generate_helper(&chacha20, outbuf,
+ sizeof(expected_oneblock));
+ if (ret != sizeof(expected_oneblock))
+ goto err;
+ if (memcmp(outbuf, expected_oneblock, sizeof(expected_oneblock)))
+ goto err;
+
+ /* Clear state of DRNG */
+ memset(&chacha20.key.u[0], 0, 48);
+
+ /* Reseed with 1 key block and one byte */
+ ret = crypto_cb->lrng_drng_seed_helper(&chacha20, seed,
+ sizeof(expected_block_nonalinged));
+ if (ret < 0)
+ goto err;
+ ret = crypto_cb->lrng_drng_generate_helper(&chacha20, outbuf,
+ sizeof(expected_block_nonalinged));
+ if (ret != sizeof(expected_block_nonalinged))
+ goto err;
+ if (memcmp(outbuf, expected_block_nonalinged,
+ sizeof(expected_block_nonalinged)))
+ goto err;
+
+ return LRNG_SELFTEST_PASSED;
+
+err:
+ pr_err("LRNG ChaCha20 DRNG self-test FAILED\n");
+ return LRNG_SEFLTEST_ERROR_CHACHA20;
+}
+
+static unsigned int lrng_selftest_status = LRNG_SELFTEST_NOT_EXECUTED;
+
+static int lrng_selftest(void)
+{
+ unsigned int ret = lrng_data_process_selftest();
+
+ ret |= lrng_chacha20_drng_selftest();
+ ret |= lrng_hash_selftest();
+ ret |= lrng_gcd_selftest();
+
+ if (ret) {
+ if (IS_ENABLED(CONFIG_LRNG_SELFTEST_PANIC))
+ panic("LRNG self-tests failed: %u\n", ret);
+ } else {
+ pr_info("LRNG self-tests passed\n");
+ }
+
+ lrng_selftest_status = ret;
+
+ if (lrng_selftest_status)
+ return -EFAULT;
+ return 0;
+}
+
+#ifdef CONFIG_SYSFS
+/* Re-perform self-test when any value is written to the sysfs file. */
+static int lrng_selftest_sysfs_set(const char *val,
+ const struct kernel_param *kp)
+{
+ return lrng_selftest();
+}
+
+static const struct kernel_param_ops lrng_selftest_sysfs = {
+ .set = lrng_selftest_sysfs_set,
+ .get = param_get_uint,
+};
+module_param_cb(selftest_status, &lrng_selftest_sysfs, &lrng_selftest_status,
+ 0644);
+#endif /* CONFIG_SYSFS */
+
+static int __init lrng_selftest_init(void)
+{
+ return lrng_selftest();
+}
+
+module_init(lrng_selftest_init);
diff -urN linux-5.15/drivers/char/lrng/lrng_switch.c linux-5.15-lrng/drivers/char/lrng/lrng_switch.c
--- linux-5.15/drivers/char/lrng/lrng_switch.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_switch.c 2021-11-29 12:37:19.323279070 +1100
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * LRNG DRNG switching support
+ *
+ * Copyright (C) 2016 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/lrng.h>
+
+#include "lrng_internal.h"
+
+static int lrng_drng_switch(struct lrng_drng *drng_store,
+ const struct lrng_crypto_cb *cb, int node)
+{
+ const struct lrng_crypto_cb *old_cb;
+ unsigned long flags = 0, flags2 = 0;
+ int ret;
+ u8 seed[LRNG_DRNG_SECURITY_STRENGTH_BYTES];
+ void *new_drng = cb->lrng_drng_alloc(LRNG_DRNG_SECURITY_STRENGTH_BYTES);
+ void *old_drng, *new_hash, *old_hash;
+ u32 current_security_strength;
+ bool sl = false, reset_drng = !lrng_get_available();
+
+ if (IS_ERR(new_drng)) {
+ pr_warn("could not allocate new DRNG for NUMA node %d (%ld)\n",
+ node, PTR_ERR(new_drng));
+ return PTR_ERR(new_drng);
+ }
+
+ new_hash = cb->lrng_hash_alloc();
+ if (IS_ERR(new_hash)) {
+ pr_warn("could not allocate new LRNG pool hash (%ld)\n",
+ PTR_ERR(new_hash));
+ cb->lrng_drng_dealloc(new_drng);
+ return PTR_ERR(new_hash);
+ }
+
+ if (cb->lrng_hash_digestsize(new_hash) > LRNG_MAX_DIGESTSIZE) {
+ pr_warn("digest size of newly requested hash too large\n");
+ cb->lrng_hash_dealloc(new_hash);
+ cb->lrng_drng_dealloc(new_drng);
+ return -EINVAL;
+ }
+
+ current_security_strength = lrng_security_strength();
+ lrng_drng_lock(drng_store, &flags);
+
+ /*
+ * Pull from existing DRNG to seed new DRNG regardless of seed status
+ * of old DRNG -- the entropy state for the DRNG is left unchanged which
+ * implies that als the new DRNG is reseeded when deemed necessary. This
+ * seeding of the new DRNG shall only ensure that the new DRNG has the
+ * same entropy as the old DRNG.
+ */
+ ret = drng_store->crypto_cb->lrng_drng_generate_helper(
+ drng_store->drng, seed, sizeof(seed));
+ lrng_drng_unlock(drng_store, &flags);
+
+ if (ret < 0) {
+ reset_drng = true;
+ pr_warn("getting random data from DRNG failed for NUMA node %d (%d)\n",
+ node, ret);
+ } else {
+ /* seed new DRNG with data */
+ ret = cb->lrng_drng_seed_helper(new_drng, seed, ret);
+ memzero_explicit(seed, sizeof(seed));
+ if (ret < 0) {
+ reset_drng = true;
+ pr_warn("seeding of new DRNG failed for NUMA node %d (%d)\n",
+ node, ret);
+ } else {
+ pr_debug("seeded new DRNG of NUMA node %d instance from old DRNG instance\n",
+ node);
+ }
+ }
+
+ mutex_lock(&drng_store->lock);
+ write_lock_irqsave(&drng_store->hash_lock, flags2);
+ /*
+ * If we switch the DRNG from the initial ChaCha20 DRNG to something
+ * else, there is a lock transition from spin lock to mutex (see
+ * lrng_drng_is_atomic and how the lock is taken in lrng_drng_lock).
+ * Thus, we need to take both locks during the transition phase.
+ */
+ if (lrng_drng_is_atomic(drng_store)) {
+ spin_lock_irqsave(&drng_store->spin_lock, flags);
+ sl = true;
+ } else {
+ __acquire(&drng_store->spin_lock);
+ }
+
+ /* Trigger the switch of the aux entropy pool for current node. */
+ if (drng_store == lrng_drng_init_instance()) {
+ ret = lrng_aux_switch_hash(cb, new_hash, drng_store->crypto_cb);
+ if (ret)
+ goto err;
+ }
+
+ /* Trigger the switch of the per-CPU entropy pools for current node. */
+ ret = lrng_pcpu_switch_hash(node, cb, new_hash, drng_store->crypto_cb);
+ if (ret) {
+ /* Switch the crypto operation back to be consistent */
+ WARN_ON(lrng_aux_switch_hash(drng_store->crypto_cb,
+ drng_store->hash, cb));
+ } else {
+ if (reset_drng)
+ lrng_drng_reset(drng_store);
+
+ old_drng = drng_store->drng;
+ old_cb = drng_store->crypto_cb;
+ drng_store->drng = new_drng;
+ drng_store->crypto_cb = cb;
+
+ old_hash = drng_store->hash;
+ drng_store->hash = new_hash;
+ pr_info("Entropy pool read-hash allocated for DRNG for NUMA node %d\n",
+ node);
+
+ /* Reseed if previous LRNG security strength was insufficient */
+ if (current_security_strength < lrng_security_strength())
+ drng_store->force_reseed = true;
+
+ /* Force oversampling seeding as we initialize DRNG */
+ if (IS_ENABLED(CONFIG_LRNG_OVERSAMPLE_ENTROPY_SOURCES))
+ lrng_unset_fully_seeded(drng_store);
+
+ if (lrng_state_min_seeded())
+ lrng_set_entropy_thresh(lrng_get_seed_entropy_osr(
+ drng_store->fully_seeded));
+
+ /* ChaCha20 serves as atomic instance left untouched. */
+ if (old_drng != &chacha20) {
+ old_cb->lrng_drng_dealloc(old_drng);
+ old_cb->lrng_hash_dealloc(old_hash);
+ }
+
+ pr_info("DRNG of NUMA node %d switched\n", node);
+ }
+
+err:
+ if (sl)
+ spin_unlock_irqrestore(&drng_store->spin_lock, flags);
+ else
+ __release(&drng_store->spin_lock);
+ write_unlock_irqrestore(&drng_store->hash_lock, flags2);
+ mutex_unlock(&drng_store->lock);
+
+ return ret;
+}
+
+/*
+ * Switch the existing DRNG instances with new using the new crypto callbacks.
+ * The caller must hold the lrng_crypto_cb_update lock.
+ */
+static int lrng_drngs_switch(const struct lrng_crypto_cb *cb)
+{
+ struct lrng_drng **lrng_drng = lrng_drng_instances();
+ struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+ int ret = 0;
+
+ /* Update DRNG */
+ if (lrng_drng) {
+ u32 node;
+
+ for_each_online_node(node) {
+ if (lrng_drng[node])
+ ret = lrng_drng_switch(lrng_drng[node], cb,
+ node);
+ }
+ } else {
+ ret = lrng_drng_switch(lrng_drng_init, cb, 0);
+ }
+
+ if (!ret)
+ lrng_set_available();
+
+ return 0;
+}
+
+/*
+ * lrng_set_drng_cb - Register new cryptographic callback functions for DRNG
+ * The registering implies that all old DRNG states are replaced with new
+ * DRNG states.
+ *
+ * @cb: Callback functions to be registered -- if NULL, use the default
+ * callbacks pointing to the ChaCha20 DRNG.
+ *
+ * Return:
+ * * 0 on success
+ * * < 0 on error
+ */
+int lrng_set_drng_cb(const struct lrng_crypto_cb *cb)
+{
+ struct lrng_drng *lrng_drng_init = lrng_drng_init_instance();
+ int ret;
+
+ if (!cb)
+ cb = &lrng_cc20_crypto_cb;
+
+ mutex_lock(&lrng_crypto_cb_update);
+
+ /*
+ * If a callback other than the default is set, allow it only to be
+ * set back to the default callback. This ensures that multiple
+ * different callbacks can be registered at the same time. If a
+ * callback different from the current callback and the default
+ * callback shall be set, the current callback must be deregistered
+ * (e.g. the kernel module providing it must be unloaded) and the new
+ * implementation can be registered.
+ */
+ if ((cb != &lrng_cc20_crypto_cb) &&
+ (lrng_drng_init->crypto_cb != &lrng_cc20_crypto_cb)) {
+ pr_warn("disallow setting new cipher callbacks, unload the old callbacks first!\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = lrng_drngs_switch(cb);
+
+out:
+ mutex_unlock(&lrng_crypto_cb_update);
+ return ret;
+}
+EXPORT_SYMBOL(lrng_set_drng_cb);
diff -urN linux-5.15/drivers/char/lrng/lrng_testing.c linux-5.15-lrng/drivers/char/lrng/lrng_testing.c
--- linux-5.15/drivers/char/lrng/lrng_testing.c 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/drivers/char/lrng/lrng_testing.c 2021-11-29 12:38:19.263278841 +1100
@@ -0,0 +1,689 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/*
+ * Linux Random Number Generator (LRNG) testing interfaces
+ *
+ * Copyright (C) 2019 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/atomic.h>
+#include <linux/bug.h>
+#include <linux/debugfs.h>
+#include <linux/lrng.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/workqueue.h>
+#include <asm/errno.h>
+
+#include "lrng_internal.h"
+
+#define LRNG_TESTING_RINGBUFFER_SIZE 1024
+#define LRNG_TESTING_RINGBUFFER_MASK (LRNG_TESTING_RINGBUFFER_SIZE - 1)
+
+struct lrng_testing {
+ u32 lrng_testing_rb[LRNG_TESTING_RINGBUFFER_SIZE];
+ u32 rb_reader;
+ u32 rb_writer;
+ atomic_t lrng_testing_enabled;
+ spinlock_t lock;
+ wait_queue_head_t read_wait;
+};
+
+/*************************** Generic Data Handling ****************************/
+
+/*
+ * boot variable:
+ * 0 ==> No boot test, gathering of runtime data allowed
+ * 1 ==> Boot test enabled and ready for collecting data, gathering runtime
+ * data is disabled
+ * 2 ==> Boot test completed and disabled, gathering of runtime data is
+ * disabled
+ */
+
+static inline void lrng_testing_reset(struct lrng_testing *data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&data->lock, flags);
+ data->rb_reader = 0;
+ data->rb_writer = 0;
+ spin_unlock_irqrestore(&data->lock, flags);
+}
+
+static inline void lrng_testing_init(struct lrng_testing *data, u32 boot)
+{
+ /*
+ * The boot time testing implies we have a running test. If the
+ * caller wants to clear it, he has to unset the boot_test flag
+ * at runtime via sysfs to enable regular runtime testing
+ */
+ if (boot)
+ return;
+
+ lrng_testing_reset(data);
+ atomic_set(&data->lrng_testing_enabled, 1);
+ pr_warn("Enabling data collection\n");
+}
+
+static inline void lrng_testing_fini(struct lrng_testing *data, u32 boot)
+{
+ /* If we have boot data, we do not reset yet to allow data to be read */
+ if (boot)
+ return;
+
+ atomic_set(&data->lrng_testing_enabled, 0);
+ lrng_testing_reset(data);
+ pr_warn("Disabling data collection\n");
+}
+
+static inline bool lrng_testing_store(struct lrng_testing *data, u32 value,
+ u32 *boot)
+{
+ unsigned long flags;
+
+ if (!atomic_read(&data->lrng_testing_enabled) && (*boot != 1))
+ return false;
+
+ spin_lock_irqsave(&data->lock, flags);
+
+ /*
+ * Disable entropy testing for boot time testing after ring buffer
+ * is filled.
+ */
+ if (*boot) {
+ if (data->rb_writer > LRNG_TESTING_RINGBUFFER_SIZE) {
+ *boot = 2;
+ pr_warn_once("One time data collection test disabled\n");
+ spin_unlock_irqrestore(&data->lock, flags);
+ return false;
+ }
+
+ if (data->rb_writer == 1)
+ pr_warn("One time data collection test enabled\n");
+ }
+
+ data->lrng_testing_rb[data->rb_writer & LRNG_TESTING_RINGBUFFER_MASK] =
+ value;
+ data->rb_writer++;
+
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ if (wq_has_sleeper(&data->read_wait))
+ wake_up_interruptible(&data->read_wait);
+
+ return true;
+}
+
+static inline bool lrng_testing_have_data(struct lrng_testing *data)
+{
+ return ((data->rb_writer & LRNG_TESTING_RINGBUFFER_MASK) !=
+ (data->rb_reader & LRNG_TESTING_RINGBUFFER_MASK));
+}
+
+static inline int lrng_testing_reader(struct lrng_testing *data, u32 *boot,
+ u8 *outbuf, u32 outbuflen)
+{
+ unsigned long flags;
+ int collected_data = 0;
+
+ lrng_testing_init(data, *boot);
+
+ while (outbuflen) {
+ spin_lock_irqsave(&data->lock, flags);
+
+ /* We have no data or reached the writer. */
+ if (!data->rb_writer ||
+ (data->rb_writer == data->rb_reader)) {
+
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ /*
+ * Now we gathered all boot data, enable regular data
+ * collection.
+ */
+ if (*boot) {
+ *boot = 0;
+ goto out;
+ }
+
+ wait_event_interruptible(data->read_wait,
+ lrng_testing_have_data(data));
+ if (signal_pending(current)) {
+ collected_data = -ERESTARTSYS;
+ goto out;
+ }
+
+ continue;
+ }
+
+ /* We copy out word-wise */
+ if (outbuflen < sizeof(u32)) {
+ spin_unlock_irqrestore(&data->lock, flags);
+ goto out;
+ }
+
+ memcpy(outbuf, &data->lrng_testing_rb[data->rb_reader],
+ sizeof(u32));
+ data->rb_reader++;
+
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ outbuf += sizeof(u32);
+ outbuflen -= sizeof(u32);
+ collected_data += sizeof(u32);
+ }
+
+out:
+ lrng_testing_fini(data, *boot);
+ return collected_data;
+}
+
+static int lrng_testing_extract_user(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos,
+ int (*reader)(u8 *outbuf, u32 outbuflen))
+{
+ u8 *tmp, *tmp_aligned;
+ int ret = 0, large_request = (nbytes > 256);
+
+ if (!nbytes)
+ return 0;
+
+ /*
+ * The intention of this interface is for collecting at least
+ * 1000 samples due to the SP800-90B requirements. So, we make no
+ * effort in avoiding allocating more memory that actually needed
+ * by the user. Hence, we allocate sufficient memory to always hold
+ * that amount of data.
+ */
+ tmp = kmalloc(LRNG_TESTING_RINGBUFFER_SIZE + sizeof(u32), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ tmp_aligned = PTR_ALIGN(tmp, sizeof(u32));
+
+ while (nbytes) {
+ int i;
+
+ if (large_request && need_resched()) {
+ if (signal_pending(current)) {
+ if (ret == 0)
+ ret = -ERESTARTSYS;
+ break;
+ }
+ schedule();
+ }
+
+ i = min_t(int, nbytes, LRNG_TESTING_RINGBUFFER_SIZE);
+ i = reader(tmp_aligned, i);
+ if (i <= 0) {
+ if (i < 0)
+ ret = i;
+ break;
+ }
+ if (copy_to_user(buf, tmp_aligned, i)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ nbytes -= i;
+ buf += i;
+ ret += i;
+ }
+
+ kfree_sensitive(tmp);
+
+ if (ret > 0)
+ *ppos += ret;
+
+ return ret;
+}
+
+/************** Raw High-Resolution Timer Entropy Data Handling ***************/
+
+#ifdef CONFIG_LRNG_RAW_HIRES_ENTROPY
+
+static u32 boot_raw_hires_test = 0;
+module_param(boot_raw_hires_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_hires_test, "Enable gathering boot time high resolution timer entropy of the first entropy events");
+
+static struct lrng_testing lrng_raw_hires = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_hires.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_hires.read_wait)
+};
+
+bool lrng_raw_hires_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_hires, value, &boot_raw_hires_test);
+}
+
+static int lrng_raw_hires_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_hires, &boot_raw_hires_test,
+ outbuf, outbuflen);
+}
+
+static ssize_t lrng_raw_hires_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_hires_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_hires_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_hires_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_HIRES_ENTROPY */
+
+/********************* Raw Jiffies Entropy Data Handling **********************/
+
+#ifdef CONFIG_LRNG_RAW_JIFFIES_ENTROPY
+
+static u32 boot_raw_jiffies_test = 0;
+module_param(boot_raw_jiffies_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_jiffies_test, "Enable gathering boot time high resolution timer entropy of the first entropy events");
+
+static struct lrng_testing lrng_raw_jiffies = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_jiffies.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_jiffies.read_wait)
+};
+
+bool lrng_raw_jiffies_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_jiffies, value,
+ &boot_raw_jiffies_test);
+}
+
+static int lrng_raw_jiffies_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_jiffies, &boot_raw_jiffies_test,
+ outbuf, outbuflen);
+}
+
+static ssize_t lrng_raw_jiffies_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_jiffies_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_jiffies_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_jiffies_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_JIFFIES_ENTROPY */
+
+/************************** Raw IRQ Data Handling ****************************/
+
+#ifdef CONFIG_LRNG_RAW_IRQ_ENTROPY
+
+static u32 boot_raw_irq_test = 0;
+module_param(boot_raw_irq_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_irq_test, "Enable gathering boot time entropy of the first IRQ entropy events");
+
+static struct lrng_testing lrng_raw_irq = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_irq.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_irq.read_wait)
+};
+
+bool lrng_raw_irq_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_irq, value, &boot_raw_irq_test);
+}
+
+static int lrng_raw_irq_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_irq, &boot_raw_irq_test, outbuf,
+ outbuflen);
+}
+
+static ssize_t lrng_raw_irq_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_irq_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_irq_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_irq_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_IRQ_ENTROPY */
+
+/************************ Raw IRQFLAGS Data Handling **************************/
+
+#ifdef CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY
+
+static u32 boot_raw_irqflags_test = 0;
+module_param(boot_raw_irqflags_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_irqflags_test, "Enable gathering boot time entropy of the first IRQ flags entropy events");
+
+static struct lrng_testing lrng_raw_irqflags = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_irqflags.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_irqflags.read_wait)
+};
+
+bool lrng_raw_irqflags_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_irqflags, value,
+ &boot_raw_irqflags_test);
+}
+
+static int lrng_raw_irqflags_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_irqflags, &boot_raw_irqflags_test,
+ outbuf, outbuflen);
+}
+
+static ssize_t lrng_raw_irqflags_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_irqflags_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_irqflags_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_irqflags_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY */
+
+/************************ Raw _RET_IP_ Data Handling **************************/
+
+#ifdef CONFIG_LRNG_RAW_RETIP_ENTROPY
+
+static u32 boot_raw_retip_test = 0;
+module_param(boot_raw_retip_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_retip_test, "Enable gathering boot time entropy of the first return instruction pointer entropy events");
+
+static struct lrng_testing lrng_raw_retip = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_retip.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_retip.read_wait)
+};
+
+bool lrng_raw_retip_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_retip, value, &boot_raw_retip_test);
+}
+
+static int lrng_raw_retip_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_retip, &boot_raw_retip_test,
+ outbuf, outbuflen);
+}
+
+static ssize_t lrng_raw_retip_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_retip_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_retip_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_retip_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_RETIP_ENTROPY */
+
+/********************** Raw IRQ register Data Handling ************************/
+
+#ifdef CONFIG_LRNG_RAW_REGS_ENTROPY
+
+static u32 boot_raw_regs_test = 0;
+module_param(boot_raw_regs_test, uint, 0644);
+MODULE_PARM_DESC(boot_raw_regs_test, "Enable gathering boot time entropy of the first interrupt register entropy events");
+
+static struct lrng_testing lrng_raw_regs = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_regs.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_regs.read_wait)
+};
+
+bool lrng_raw_regs_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_regs, value, &boot_raw_regs_test);
+}
+
+static int lrng_raw_regs_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_regs, &boot_raw_regs_test,
+ outbuf, outbuflen);
+}
+
+static ssize_t lrng_raw_regs_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_regs_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_regs_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_regs_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_REGS_ENTROPY */
+
+/********************** Raw Entropy Array Data Handling ***********************/
+
+#ifdef CONFIG_LRNG_RAW_ARRAY
+
+static u32 boot_raw_array = 0;
+module_param(boot_raw_array, uint, 0644);
+MODULE_PARM_DESC(boot_raw_array, "Enable gathering boot time raw noise array data of the first entropy events");
+
+static struct lrng_testing lrng_raw_array = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_raw_array.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_raw_array.read_wait)
+};
+
+bool lrng_raw_array_entropy_store(u32 value)
+{
+ return lrng_testing_store(&lrng_raw_array, value, &boot_raw_array);
+}
+
+static int lrng_raw_array_entropy_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_raw_array, &boot_raw_array, outbuf,
+ outbuflen);
+}
+
+static ssize_t lrng_raw_array_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_raw_array_entropy_reader);
+}
+
+static const struct file_operations lrng_raw_array_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_raw_array_read,
+};
+
+#endif /* CONFIG_LRNG_RAW_ARRAY */
+
+/******************** Interrupt Performance Data Handling *********************/
+
+#ifdef CONFIG_LRNG_IRQ_PERF
+
+static u32 boot_irq_perf = 0;
+module_param(boot_irq_perf, uint, 0644);
+MODULE_PARM_DESC(boot_irq_perf, "Enable gathering boot time interrupt performance data of the first entropy events");
+
+static struct lrng_testing lrng_irq_perf = {
+ .rb_reader = 0,
+ .rb_writer = 0,
+ .lock = __SPIN_LOCK_UNLOCKED(lrng_irq_perf.lock),
+ .read_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lrng_irq_perf.read_wait)
+};
+
+bool lrng_perf_time(u32 start)
+{
+ return lrng_testing_store(&lrng_irq_perf, random_get_entropy() - start,
+ &boot_irq_perf);
+}
+
+static int lrng_irq_perf_reader(u8 *outbuf, u32 outbuflen)
+{
+ return lrng_testing_reader(&lrng_irq_perf, &boot_irq_perf, outbuf,
+ outbuflen);
+}
+
+static ssize_t lrng_irq_perf_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ return lrng_testing_extract_user(file, to, count, ppos,
+ lrng_irq_perf_reader);
+}
+
+static const struct file_operations lrng_irq_perf_fops = {
+ .owner = THIS_MODULE,
+ .read = lrng_irq_perf_read,
+};
+
+#endif /* CONFIG_LRNG_IRQ_PERF */
+
+/*********************************** ACVT ************************************/
+
+#ifdef CONFIG_LRNG_ACVT_HASH
+
+/* maximum amount of data to be hashed as defined by ACVP */
+#define LRNG_ACVT_MAX_SHA_MSG (65536 >> 3)
+
+/*
+ * As we use static variables to store the data, it is clear that the
+ * test interface is only able to handle single threaded testing. This is
+ * considered to be sufficient for testing. If multi-threaded use of the
+ * ACVT test interface would be performed, the caller would get garbage
+ * but the kernel operation is unaffected by this.
+ */
+static u8 lrng_acvt_hash_data[LRNG_ACVT_MAX_SHA_MSG]
+ __aligned(LRNG_KCAPI_ALIGN);
+static atomic_t lrng_acvt_hash_data_size = ATOMIC_INIT(0);
+static u8 lrng_acvt_hash_digest[LRNG_ATOMIC_DIGEST_SIZE];
+
+static ssize_t lrng_acvt_hash_write(struct file *file, const char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ if (nbytes > LRNG_ACVT_MAX_SHA_MSG)
+ return -EINVAL;
+
+ atomic_set(&lrng_acvt_hash_data_size, (int)nbytes);
+
+ return simple_write_to_buffer(lrng_acvt_hash_data,
+ LRNG_ACVT_MAX_SHA_MSG, ppos, buf, nbytes);
+}
+
+static ssize_t lrng_acvt_hash_read(struct file *file, char __user *to,
+ size_t count, loff_t *ppos)
+{
+ SHASH_DESC_ON_STACK(shash, NULL);
+ const struct lrng_crypto_cb *crypto_cb = &lrng_cc20_crypto_cb;
+ ssize_t ret;
+
+ if (count > LRNG_ATOMIC_DIGEST_SIZE)
+ return -EINVAL;
+
+ ret = crypto_cb->lrng_hash_init(shash, NULL) ?:
+ crypto_cb->lrng_hash_update(shash, lrng_acvt_hash_data,
+ atomic_read_u32(&lrng_acvt_hash_data_size)) ?:
+ crypto_cb->lrng_hash_final(shash, lrng_acvt_hash_digest);
+ if (ret)
+ return ret;
+
+ return simple_read_from_buffer(to, count, ppos, lrng_acvt_hash_digest,
+ sizeof(lrng_acvt_hash_digest));
+}
+
+static const struct file_operations lrng_acvt_hash_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .llseek = default_llseek,
+ .read = lrng_acvt_hash_read,
+ .write = lrng_acvt_hash_write,
+};
+
+#endif /* CONFIG_LRNG_ACVT_DRNG */
+
+/**************************************************************************
+ * Debugfs interface
+ **************************************************************************/
+
+static int __init lrng_raw_init(void)
+{
+ struct dentry *lrng_raw_debugfs_root;
+
+ lrng_raw_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+
+#ifdef CONFIG_LRNG_RAW_HIRES_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_hires", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_hires_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_JIFFIES_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_jiffies", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_jiffies_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_IRQ_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_irq", 0400, lrng_raw_debugfs_root,
+ NULL, &lrng_raw_irq_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_IRQFLAGS_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_irqflags", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_irqflags_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_RETIP_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_retip", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_retip_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_REGS_ENTROPY
+ debugfs_create_file_unsafe("lrng_raw_regs", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_regs_fops);
+#endif
+#ifdef CONFIG_LRNG_RAW_ARRAY
+ debugfs_create_file_unsafe("lrng_raw_array", 0400,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_raw_array_fops);
+#endif
+#ifdef CONFIG_LRNG_IRQ_PERF
+ debugfs_create_file_unsafe("lrng_irq_perf", 0400, lrng_raw_debugfs_root,
+ NULL, &lrng_irq_perf_fops);
+#endif
+#ifdef CONFIG_LRNG_ACVT_HASH
+ debugfs_create_file_unsafe("lrng_acvt_hash", 0600,
+ lrng_raw_debugfs_root, NULL,
+ &lrng_acvt_hash_fops);
+#endif
+
+ return 0;
+}
+
+module_init(lrng_raw_init);
diff -urN linux-5.15/include/crypto/drbg.h linux-5.15-lrng/include/crypto/drbg.h
--- linux-5.15/include/crypto/drbg.h 2021-11-01 07:53:10.000000000 +1100
+++ linux-5.15-lrng/include/crypto/drbg.h 2021-11-29 12:37:31.183279025 +1100
@@ -278,4 +278,11 @@
DRBG_PREFIX3
};
+extern int drbg_alloc_state(struct drbg_state *drbg);
+extern void drbg_dealloc_state(struct drbg_state *drbg);
+extern void drbg_convert_tfm_core(const char *cra_driver_name, int *coreref,
+ bool *pr);
+extern const struct drbg_core drbg_cores[];
+extern unsigned short drbg_sec_strength(drbg_flag_t flags);
+
#endif /* _DRBG_H */
diff -urN linux-5.15/include/crypto/internal/jitterentropy.h linux-5.15-lrng/include/crypto/internal/jitterentropy.h
--- linux-5.15/include/crypto/internal/jitterentropy.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/include/crypto/internal/jitterentropy.h 2021-11-29 12:37:52.903278942 +1100
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+extern void *jent_zalloc(unsigned int len);
+extern void jent_zfree(void *ptr);
+extern int jent_fips_enabled(void);
+extern void jent_panic(char *s);
+extern void jent_memcpy(void *dest, const void *src, unsigned int n);
+extern void jent_get_nstime(__u64 *out);
+
+struct rand_data;
+extern int jent_entropy_init(void);
+extern int jent_read_entropy(struct rand_data *ec, unsigned char *data,
+ unsigned int len);
+
+extern struct rand_data *jent_entropy_collector_alloc(unsigned int osr,
+ unsigned int flags);
+extern void jent_entropy_collector_free(struct rand_data *entropy_collector);
diff -urN linux-5.15/include/linux/lrng.h linux-5.15-lrng/include/linux/lrng.h
--- linux-5.15/include/linux/lrng.h 1970-01-01 10:00:00.000000000 +1000
+++ linux-5.15-lrng/include/linux/lrng.h 2021-11-29 12:36:52.113279174 +1100
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * Copyright (C) 2018 - 2021, Stephan Mueller <smueller@chronox.de>
+ */
+
+#ifndef _LRNG_H
+#define _LRNG_H
+
+#include <crypto/hash.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+
+/*
+ * struct lrng_crypto_cb - cryptographic callback functions
+ * @lrng_drng_name Name of DRNG
+ * @lrng_hash_name Name of Hash used for reading entropy pool
+ * @lrng_drng_alloc: Allocate DRNG -- the provided integer should be
+ * used for sanity checks.
+ * return: allocated data structure or PTR_ERR on
+ * error
+ * @lrng_drng_dealloc: Deallocate DRNG
+ * @lrng_drng_seed_helper: Seed the DRNG with data of arbitrary length
+ * drng: is pointer to data structure allocated
+ * with lrng_drng_alloc
+ * return: >= 0 on success, < 0 on error
+ * @lrng_drng_generate_helper: Generate random numbers from the DRNG with
+ * arbitrary length
+ * @lrng_hash_alloc: Allocate the hash for reading the entropy pool
+ * return: allocated data structure (NULL is
+ * success too) or ERR_PTR on error
+ * @lrng_hash_dealloc: Deallocate Hash
+ * @lrng_hash_digestsize: Return the digestsize for the used hash to read
+ * out entropy pool
+ * hash: is pointer to data structure allocated
+ * with lrng_hash_alloc
+ * return: size of digest of hash in bytes
+ * @lrng_hash_init: Initialize hash
+ * hash: is pointer to data structure allocated
+ * with lrng_hash_alloc
+ * return: 0 on success, < 0 on error
+ * @lrng_hash_update: Update hash operation
+ * hash: is pointer to data structure allocated
+ * with lrng_hash_alloc
+ * return: 0 on success, < 0 on error
+ * @lrng_hash_final Final hash operation
+ * hash: is pointer to data structure allocated
+ * with lrng_hash_alloc
+ * return: 0 on success, < 0 on error
+ * @lrng_hash_desc_zero Zeroization of hash state buffer
+ *
+ * Assumptions:
+ *
+ * 1. Hash operation will not sleep
+ * 2. The hash' volatile state information is provided with *shash by caller.
+ */
+struct lrng_crypto_cb {
+ const char *(*lrng_drng_name)(void);
+ const char *(*lrng_hash_name)(void);
+ void *(*lrng_drng_alloc)(u32 sec_strength);
+ void (*lrng_drng_dealloc)(void *drng);
+ int (*lrng_drng_seed_helper)(void *drng, const u8 *inbuf, u32 inbuflen);
+ int (*lrng_drng_generate_helper)(void *drng, u8 *outbuf, u32 outbuflen);
+ void *(*lrng_hash_alloc)(void);
+ void (*lrng_hash_dealloc)(void *hash);
+ u32 (*lrng_hash_digestsize)(void *hash);
+ int (*lrng_hash_init)(struct shash_desc *shash, void *hash);
+ int (*lrng_hash_update)(struct shash_desc *shash, const u8 *inbuf,
+ u32 inbuflen);
+ int (*lrng_hash_final)(struct shash_desc *shash, u8 *digest);
+ void (*lrng_hash_desc_zero)(struct shash_desc *shash);
+};
+
+/* Register cryptographic backend */
+#ifdef CONFIG_LRNG_DRNG_SWITCH
+int lrng_set_drng_cb(const struct lrng_crypto_cb *cb);
+#else /* CONFIG_LRNG_DRNG_SWITCH */
+static inline int
+lrng_set_drng_cb(const struct lrng_crypto_cb *cb) { return -EOPNOTSUPP; }
+#endif /* CONFIG_LRNG_DRNG_SWITCH */
+
+#endif /* _LRNG_H */