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powerpc: Rename LWSYNC_ON_SMP to PPC_RELEASE_BARRIER, ISYNC_ON_SMP to PPC_ACQUIRE_BARRIER

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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>
This commit is contained in:
Anton Blanchard
2010-02-10 01:04:06 +00:00
committed by Benjamin Herrenschmidt
parent 66d99b8834
commit f10e2e5b4b
7 changed files with 65 additions and 60 deletions
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6
arch/powerpc/include/asm/mutex.h
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@ -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)