btrfs: Relax memory barrier in btrfs_tree_unlock

[sfrench/cifs-2.6.git] / fs / btrfs / locking.c

diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index d13128c70dddc2b440f29f167efe0862d8792e2e..621083f8932c7e5b61d5d9734bd187e73abd1e69 100644 (file)
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -290,7 +290,7 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
                /*
                 * Make sure counter is updated before we wake up waiters.
                 */
-               smp_mb();
+               smp_mb__after_atomic();
                if (waitqueue_active(&eb->write_lock_wq))
                        wake_up(&eb->write_lock_wq);
        } else {