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>
git-mirror · Oct 24, 2013 · cf10b79 · cf10b79
1 parent 5686b06
commit cf10b79
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
@@ -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 */