[PATCH 3/3] MIPS: bugfix - replace smp_mb with release barrier function in unlocks

[Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>]

Repleace smp_mb() in arch_write_unlock() and __clear_bit_unlock() to
smp_mb__before_llsc() call which does "release" barrier functionality.

It seems like it was missed in commit f252ffd50c97dae87b45f1dbad24f71358ccfbd6
during introduction of "acquire" and "release" semantics.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
---
 arch/mips/include/asm/bitops.h   |    2 +-
 arch/mips/include/asm/spinlock.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index 0cf29bd5dc5c..ce9666cf1499 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -469,7 +469,7 @@ static inline int test_and_change_bit(unsigned long nr,
  */
 static inline void __clear_bit_unlock(unsigned long nr, volatile unsigned long *addr)
 {
-	smp_mb();
+	smp_mb__before_llsc();
 	__clear_bit(nr, addr);
 }
 
diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h
index 1fca2e0793dc..7c7f3b2bd3de 100644
--- a/arch/mips/include/asm/spinlock.h
+++ b/arch/mips/include/asm/spinlock.h
@@ -317,7 +317,7 @@ static inline void arch_write_lock(arch_rwlock_t *rw)
 
 static inline void arch_write_unlock(arch_rwlock_t *rw)
 {
-	smp_mb();
+	smp_mb__before_llsc();
 
 	__asm__ __volatile__(
 	"				# arch_write_unlock	\n"