Commit a84b086b authored Apr 22, 2013 by Chen Gang Committed by Catalin Marinas Apr 23, 2013

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>

parent 12f88398

arch/arm64/include/asm/cmpxchg.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 */