[PATCH] ARM64: kernel: compiling issue, define cmpxchg64 and cmpxchg64_local for outside using.

[Chen Gang]

  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 at asianux.com>
---
 arch/arm64/include/asm/cmpxchg.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 968b5cb..8a8ce0e 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 */
-- 
1.7.7.6