It only makes sense to do this for the LLSC config
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
arch/arc/include/asm/cmpxchg.h | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
index 00deb076d6f6..e2ae0eb1ca07 100644
--- a/arch/arc/include/asm/cmpxchg.h
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -38,7 +38,7 @@
_prev; \
})
-#define arch_cmpxchg(ptr, old, new) \
+#define arch_cmpxchg_relaxed(ptr, old, new) \
({ \
__typeof__(ptr) _p_ = (ptr); \
__typeof__(*(ptr)) _o_ = (old); \
@@ -47,12 +47,7 @@
\
switch(sizeof((_p_))) { \
case 4: \
- /* \
- * Explicit full memory barrier needed before/after \
- */ \
- smp_mb(); \
_prev_ = __cmpxchg(_p_, _o_, _n_); \
- smp_mb(); \
break; \
default: \
BUILD_BUG(); \
@@ -108,16 +103,14 @@
_val_; /* get old value */ \
})
-#define arch_xchg(ptr, val) \
+#define arch_xchg_relaxed(ptr, val) \
({ \
__typeof__(ptr) _p_ = (ptr); \
__typeof__(*(ptr)) _val_ = (val); \
\
switch(sizeof(*(_p_))) { \
case 4: \
- smp_mb(); \
_val_ = __xchg(_p_, _val_); \
- smp_mb(); \
break; \
default: \
BUILD_BUG(); \
--
2.25.1
