Merge tag 'ktest-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[cascardo/linux.git] / arch / powerpc / lib / locks.c

diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index 0c9c8d7..170a034 100644 (file)
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -70,12 +70,16 @@ void __rw_yield(arch_rwlock_t *rw)
 
 void arch_spin_unlock_wait(arch_spinlock_t *lock)
 {
+       smp_mb();
+
        while (lock->slock) {
                HMT_low();
                if (SHARED_PROCESSOR)
                        __spin_yield(lock);
        }
        HMT_medium();
+
+       smp_mb();
 }
 
 EXPORT_SYMBOL(arch_spin_unlock_wait);