diff --git a/[refs] b/[refs]
index a8e65ef3547a..d84aeaa742d1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3e74317ad773ba9df36db1fa32848cba41ac4d1a
+refs/heads/master: 1daf3540fa77faea2f91d96bcaf07ce48ee827be
diff --git a/trunk/fs/btrfs/relocation.c b/trunk/fs/btrfs/relocation.c
index 017281dbb2a7..5a105a086acf 100644
--- a/trunk/fs/btrfs/relocation.c
+++ b/trunk/fs/btrfs/relocation.c
@@ -1279,7 +1279,9 @@ static int __update_reloc_root(struct btrfs_root *root, int del)
 		if (rb_node)
 			backref_tree_panic(rb_node, -EEXIST, node->bytenr);
 	} else {
+		spin_lock(&root->fs_info->trans_lock);
 		list_del_init(&root->root_list);
+		spin_unlock(&root->fs_info->trans_lock);
 		kfree(node);
 	}
 	return 0;