diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2010-01-09 02:17:43 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 12:53:06 +0100 |
| commit | f252ffd50c97dae87b45f1dbad24f71358ccfbd6 (patch) | |
| tree | c057fc7c3a819152603b286f935fb367fc48ae73 /arch/mips/include/asm/spinlock.h | |
| parent | MIPS: Remove unused macros from barrier.h (diff) | |
| download | linux-f252ffd50c97dae87b45f1dbad24f71358ccfbd6.tar.xz linux-f252ffd50c97dae87b45f1dbad24f71358ccfbd6.zip | |
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.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h index 21ef9efbde43..5f16696eaa00 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__( |