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authorAnton Blanchard <anton@samba.org>2010-02-10 01:04:06 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-02-17 14:03:15 +1100
commitf10e2e5b4b4c9937de596f96ffe028be3a565598 (patch)
tree89808d05159ac5bd4aeea53b52dc0ddb3373fe65 /arch/powerpc/include/asm/mutex.h
parent66d99b883419b8df6d0a24ca957da7ab4831cf6e (diff)
powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER
For performance reasons we are about to change ISYNC_ON_SMP to sometimes be lwsync. Now that the macro name doesn't make sense, change it and LWSYNC_ON_SMP to better explain what the barriers are doing. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/mutex.h')
-rw-r--r--arch/powerpc/include/asm/mutex.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/mutex.h b/arch/powerpc/include/asm/mutex.h
index dabc01c727b8..5399f7e18102 100644
--- a/arch/powerpc/include/asm/mutex.h
+++ b/arch/powerpc/include/asm/mutex.h
@@ -15,7 +15,7 @@ static inline int __mutex_cmpxchg_lock(atomic_t *v, int old, int new)
PPC405_ERR77(0,%1)
" stwcx. %3,0,%1\n\
bne- 1b"
- ISYNC_ON_SMP
+ PPC_ACQUIRE_BARRIER
"\n\
2:"
: "=&r" (t)
@@ -35,7 +35,7 @@ static inline int __mutex_dec_return_lock(atomic_t *v)
PPC405_ERR77(0,%1)
" stwcx. %0,0,%1\n\
bne- 1b"
- ISYNC_ON_SMP
+ PPC_ACQUIRE_BARRIER
: "=&r" (t)
: "r" (&v->counter)
: "cc", "memory");
@@ -48,7 +48,7 @@ static inline int __mutex_inc_return_unlock(atomic_t *v)
int t;
__asm__ __volatile__(
- LWSYNC_ON_SMP
+ PPC_RELEASE_BARRIER
"1: lwarx %0,0,%1 # mutex unlock\n\
addic %0,%0,1\n"
PPC405_ERR77(0,%1)