Commit cf10b79a authored Oct 09, 2013 by Will Deacon Committed by Catalin Marinas Oct 24, 2013

arm64: cmpxchg: implement cmpxchg64_relaxed



This patch introduces cmpxchg64_relaxed for arm64 using the existing
cmpxchg_local macro, which performs a cmpxchg operation (up to 64 bits)
without barrier semantics.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 5686b06c

arch/arm64/include/asm/cmpxchg.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -173,4 +173,6 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
		#define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n))
		#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n))

		#define cmpxchg64_relaxed(ptr,o,n) cmpxchg_local((ptr),(o),(n))

		#endif /* __ASM_CMPXCHG_H */