cmpxchg_relaxed offers an SMP-safe, barrier-less cmpxchg implementation
so we can define it in the same way that we implement cmpxchg_local on
arm64.
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
---
arch/arm64/include/asm/cmpxchg.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index d8c25b7b18fb..317bb7f6f92a 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -219,7 +219,7 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
__ret; \
})
-#define cmpxchg_local(ptr, o, n) \
+#define cmpxchg_relaxed(ptr, o, n) \
({ \
__typeof__(*(ptr)) __ret; \
__ret = (__typeof__(*(ptr))) \
@@ -228,6 +228,8 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
__ret; \
})
+#define cmpxchg_local cmpxchg_relaxed
+
#define cmpxchg_double(ptr1, ptr2, o1, o2, n1, n2) \
({\
int __ret;\
@@ -274,6 +276,6 @@ 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))
+#define cmpxchg64_relaxed(ptr,o,n) cmpxchg_relaxed((ptr),(o),(n))
#endif /* __ASM_CMPXCHG_H */
--
2.1.4
--
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