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authorChen Gang <gang.chen@asianux.com>2013-04-22 06:08:41 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2013-04-23 11:47:26 +0100
commita84b086b874e0c03ca456c1748df7031a8cdf957 (patch)
tree28adcec35f32608bd4857c9382eda9351b80132e /arch/arm64/include
parent12f883989cf91afa8509c547feebbc3acbc04497 (diff)
downloadlinaro-lsk-a84b086b874e0c03ca456c1748df7031a8cdf957.tar.gz
arm64: Define cmpxchg64 and cmpxchg64_local for outside use
Drivers use cmpxchg64, cmpxchg64_local to perform 64-bit operation, so they can cross 32-bit and 64-bit platforms (it is a standard way). Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
-rw-r--r--arch/arm64/include/asm/cmpxchg.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 968b5cbfc26..8a8ce0e73a3 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -170,4 +170,7 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
(unsigned long)(n), \
sizeof(*(ptr))))
+#define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n))
+#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n))
+
#endif /* __ASM_CMPXCHG_H */