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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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16
arch/powerpc/include/asm/system.h
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@@ -232,12 +232,12 @@ __xchg_u32(volatile void *p, unsigned long val)
unsigned long prev;
__asm__ __volatile__(
LWSYNC_ON_SMP
PPC_RELEASE_BARRIER
"1: lwarx %0,0,%2 \n"
PPC405_ERR77(0,%2)
" stwcx. %3,0,%2 \n\
bne- 1b"
ISYNC_ON_SMP
PPC_ACQUIRE_BARRIER
: "=&r" (prev), "+m" (*(volatile unsigned int *)p)
: "r" (p), "r" (val)
: "cc", "memory");
@@ -275,12 +275,12 @@ __xchg_u64(volatile void *p, unsigned long val)
unsigned long prev;
__asm__ __volatile__(
LWSYNC_ON_SMP
PPC_RELEASE_BARRIER
"1: ldarx %0,0,%2 \n"
PPC405_ERR77(0,%2)
" stdcx. %3,0,%2 \n\
bne- 1b"
ISYNC_ON_SMP
PPC_ACQUIRE_BARRIER
: "=&r" (prev), "+m" (*(volatile unsigned long *)p)
: "r" (p), "r" (val)
: "cc", "memory");
@@ -366,14 +366,14 @@ __cmpxchg_u32(volatile unsigned int *p, unsigned long old, unsigned long new)
unsigned int prev;
__asm__ __volatile__ (
LWSYNC_ON_SMP
PPC_RELEASE_BARRIER
"1: lwarx %0,0,%2 # __cmpxchg_u32\n\
cmpw 0,%0,%3\n\
bne- 2f\n"
PPC405_ERR77(0,%2)
" stwcx. %4,0,%2\n\
bne- 1b"
ISYNC_ON_SMP
PPC_ACQUIRE_BARRIER
"\n\
2:"
: "=&r" (prev), "+m" (*p)
@@ -412,13 +412,13 @@ __cmpxchg_u64(volatile unsigned long *p, unsigned long old, unsigned long new)
unsigned long prev;
__asm__ __volatile__ (
LWSYNC_ON_SMP
PPC_RELEASE_BARRIER
"1: ldarx %0,0,%2 # __cmpxchg_u64\n\
cmpd 0,%0,%3\n\
bne- 2f\n\
stdcx. %4,0,%2\n\
bne- 1b"
ISYNC_ON_SMP
PPC_ACQUIRE_BARRIER
"\n\
2:"
: "=&r" (prev), "+m" (*p)