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authorDavid Daney <ddaney@caviumnetworks.com>2010-01-08 17:17:43 -0800
committerRalf Baechle <ralf@linux-mips.org>2010-02-27 12:53:06 +0100
commitf252ffd50c97dae87b45f1dbad24f71358ccfbd6 (patch)
treec057fc7c3a819152603b286f935fb367fc48ae73 /arch/mips/include/asm/spinlock.h
parentec5380c768864c7afd92aa886dd4bb6d38497a01 (diff)
MIPS: New macro smp_mb__before_llsc.
Replace some instances of smp_llsc_mb() with a new macro smp_mb__before_llsc(). It is used before ll/sc sequences that are documented as needing write barrier semantics. The default implementation of smp_mb__before_llsc() is just smp_llsc_mb(), so there are no changes in semantics. Also simplify definition of smp_mb(), smp_rmb(), and smp_wmb() to be just barrier() in the non-SMP case. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/851/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/spinlock.h')
-rw-r--r--arch/mips/include/asm/spinlock.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h
index 21ef9efbde4..5f16696eaa0 100644
--- a/arch/mips/include/asm/spinlock.h
+++ b/arch/mips/include/asm/spinlock.h
@@ -138,7 +138,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
int tmp;
- smp_llsc_mb();
+ smp_mb__before_llsc();
if (R10000_LLSC_WAR) {
__asm__ __volatile__ (
@@ -305,7 +305,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
{
unsigned int tmp;
- smp_llsc_mb();
+ smp_mb__before_llsc();
if (R10000_LLSC_WAR) {
__asm__ __volatile__(