diff --git a/[refs] b/[refs]
index 9606afbbbcc8..0ab0a8c65a09 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c742b53114f8d1535608dafb6a5690103a0748b5
+refs/heads/master: 72ed3d035855841ad611ee48b20909e9619d4a79
diff --git a/trunk/fs/buffer.c b/trunk/fs/buffer.c
index 763c5b59492d..7ff6e9346fae 100644
--- a/trunk/fs/buffer.c
+++ b/trunk/fs/buffer.c
@@ -78,6 +78,7 @@ EXPORT_SYMBOL(__lock_buffer);
 
 void fastcall unlock_buffer(struct buffer_head *bh)
 {
+	smp_mb__before_clear_bit();
 	clear_buffer_locked(bh);
 	smp_mb__after_clear_bit();
 	wake_up_bit(&bh->b_state, BH_Lock);