From: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
This will save one SYNCW on Octeon and improve tight
uncontended spinlock loop performance by 17%.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
---
arch/mips/include/asm/atomic.h | 3 +++
arch/mips/include/asm/cmpxchg.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index f904084..a4e5116 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -264,4 +264,7 @@ ATOMIC_SIP_OP(atomic64, s64, dsubu, lld, scd)
#undef ATOMIC_SIP_OP
+#define atomic_cmpxchg_relaxed(v, o, n) \
+ (cmpxchg_relaxed(&((v)->counter), (o), (n)))
+
#endif /* _ASM_ATOMIC_H */
diff --git a/arch/mips/include/asm/cmpxchg.h b/arch/mips/include/asm/cmpxchg.h
index 5b0b3a6..620f01a 100644
--- a/arch/mips/include/asm/cmpxchg.h
+++ b/arch/mips/include/asm/cmpxchg.h
@@ -182,6 +182,8 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
(unsigned long)(__typeof__(*(ptr)))(new), \
sizeof(*(ptr))))
+#define cmpxchg_relaxed cmpxchg_local
+
#define cmpxchg(ptr, old, new) \
({ \
__typeof__(*(ptr)) __res; \
--
2.10.2
