1 files changed, 0 insertions, 74 deletions
diff --git a/system/musl/ppc64-atomic.patch b/system/musl/ppc64-atomic.patch
deleted file mode 100644
index 6e96a9048..000000000
--- a/system/musl/ppc64-atomic.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From 12817793301398241b6cb00c740f0d3ca41076e9 Mon Sep 17 00:00:00 2001
-From: Rich Felker <dalias@aerifal.cx>
-Date: Fri, 14 Sep 2018 10:47:16 -0400
-Subject: fix broken atomic store on powerpc[64]
-
-in our memory model, all atomics are supposed to be full barriers;
-stores are not release-only. this is important because store is used
-as an unlock operation in places where it needs to acquire the waiter
-count to determine if a futex wake is needed. at least in the
-malloc-internal locks, but possibly elsewhere, soft deadlocks from
-missing futex wake (breakable by poking the threads to restart the
-syscall, e.g. by attaching a tracer) were reported to occur.
-
-once the malloc lock is replaced with Jens Gustedt's new lock
-implementation (see commit 47d0bcd4762f223364e5b58d5a381aaa0cbd7c38),
-malloc will not be affected by the issue, but it's not clear that
-other uses won't be. reducing the strength of the ordering properties
-required from a_store would require a thorough analysis of how it's
-used.
-
-to fix the problem, I'm removing the powerpc[64]-specific a_store
-definition; now, the top-level atomic.h will implement a_store using
-a_barrier on both sides of the store.
-
-it's not clear to me yet whether there might be issues with the other
-atomics. it's possible that a_post_llsc needs to be replaced with a
-full barrier to guarantee the formal semanics we want, but either way
-I think the difference is unlikely to impact the way we use them.
----
- arch/powerpc/atomic_arch.h   | 8 --------
- arch/powerpc64/atomic_arch.h | 8 --------
- 2 files changed, 16 deletions(-)
-
-diff --git a/arch/powerpc/atomic_arch.h b/arch/powerpc/atomic_arch.h
-index 5b65cde7..c2673919 100644
---- a/arch/powerpc/atomic_arch.h
-+++ b/arch/powerpc/atomic_arch.h
-@@ -30,14 +30,6 @@ static inline void a_post_llsc()
- 	__asm__ __volatile__ ("isync" : : : "memory");
- }
- 
--#define a_store a_store
--static inline void a_store(volatile int *p, int v)
--{
--	a_pre_llsc();
--	*p = v;
--	a_post_llsc();
--}
--
- #define a_clz_32 a_clz_32
- static inline int a_clz_32(uint32_t x)
- {
-diff --git a/arch/powerpc64/atomic_arch.h b/arch/powerpc64/atomic_arch.h
-index 17cababd..2bed82be 100644
---- a/arch/powerpc64/atomic_arch.h
-+++ b/arch/powerpc64/atomic_arch.h
-@@ -48,14 +48,6 @@ static inline void a_post_llsc()
- 	__asm__ __volatile__ ("isync" : : : "memory");
- }
- 
--#define a_store a_store
--static inline void a_store(volatile int *p, int v)
--{
--	a_pre_llsc();
--	*p = v;
--	a_post_llsc();
--}
--
- #define a_crash a_crash
- static inline void a_crash()
- {
--- 
-cgit v1.2.1
-