From 41c34d188a598b016d62e152735f8466fe9910a4 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Sun, 26 May 2013 15:49:08 +0000
Subject: fix ioctl _IOR, _IOW, etc macros to avoid signed overflow (2<<30)
---
arch/powerpc/bits/ioctl.h | 25 +++----------------------
1 file changed, 3 insertions(+), 22 deletions(-)
(limited to 'arch/powerpc')
diff --git a/arch/powerpc/bits/ioctl.h b/arch/powerpc/bits/ioctl.h
index 15cd6c72..0c903dcb 100644
--- a/arch/powerpc/bits/ioctl.h
+++ b/arch/powerpc/bits/ioctl.h
@@ -1,31 +1,12 @@
-//#define _IOC(a,b,c,d) ( ((a)<<29) | ((b)<<8) | (c) | ((d)<<16) )
-//
-#define _IOC_SIZEBITS 13
-#define _IOC_DIRBITS 3
-
-#define _IOC_NRBITS 8
-#define _IOC_TYPEBITS 8
-
-#define _IOC_NRSHIFT 0
-#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
-#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
-#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
-
-#define _IOC(dir,type,nr,size) \
- (((dir) << _IOC_DIRSHIFT) | \
- ((type) << _IOC_TYPESHIFT) | \
- ((nr) << _IOC_NRSHIFT) | \
- ((size) << _IOC_SIZESHIFT))
-
-
+#define _IOC(a,b,c,d) ( ((a)<<29) | ((b)<<8) | (c) | ((d)<<16) )
#define _IOC_NONE 1U
#define _IOC_WRITE 4U
#define _IOC_READ 2U
#define _IO(a,b) _IOC(_IOC_NONE,(a),(b),0)
#define _IOW(a,b,c) _IOC(_IOC_WRITE,(a),(b),sizeof(c))
-#define _IOR(a,b,c) _IOC(_IOC_READ ,(a),(b),sizeof(c))
-#define _IOWR(a,b,c) _IOC(_IOC_READ | _IOC_WRITE,(a),(b),sizeof(c))
+#define _IOR(a,b,c) _IOC(_IOC_READ,(a),(b),sizeof(c))
+#define _IOWR(a,b,c) _IOC(_IOC_READ|_IOC_WRITE,(a),(b),sizeof(c))
#define FIONCLEX _IO('f', 2)
#define FIOCLEX _IO('f', 1)
--
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