diff --git a/[refs] b/[refs]
index 4bc5c9cfd544..c78e07e9bf45 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 69bca40d41c613927b150c5392505f1894fe3010
+refs/heads/master: e18fca734278784bd6591de63ca148cc27344ca9
diff --git a/trunk/fs/btrfs/disk-io.c b/trunk/fs/btrfs/disk-io.c
index e22c5bbf0223..7d7bc8eace86 100644
--- a/trunk/fs/btrfs/disk-io.c
+++ b/trunk/fs/btrfs/disk-io.c
@@ -3426,6 +3426,7 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 				mutex_unlock(&head->mutex);
 				btrfs_put_delayed_ref(ref);
 
+				spin_lock(&delayed_refs->lock);
 				continue;
 			}