diff --git a/arch/arm/include/asm/mutex.h b/arch/arm/include/asm/mutex.h
index 93226cf23ae..fd3f17ef94a 100644
--- a/arch/arm/include/asm/mutex.h
+++ b/arch/arm/include/asm/mutex.h
@@ -41,6 +41,8 @@ __mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *))
 	__res |= __ex_flag;
 	if (unlikely(__res != 0))
 		fail_fn(count);
+	else
+		smp_rmb();
 }
 
 static inline int
@@ -61,6 +63,9 @@ __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *))
 	__res |= __ex_flag;
 	if (unlikely(__res != 0))
 		__res = fail_fn(count);
+	else
+		smp_rmb();
+
 	return __res;
 }
 
@@ -74,6 +79,7 @@ __mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
 {
 	int __ex_flag, __res, __orig;
 
+	smp_wmb();
 	__asm__ (
 
 		"ldrex	%0, [%3]	\n\t"
@@ -119,6 +125,8 @@ __mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
 		: "=&r" (__orig), "=&r" (__res), "=&r" (__ex_flag)
 		: "r" (&count->counter)
 		: "cc", "memory" );
+	if (__orig)
+		smp_rmb();
 
 	return __orig;
 }