Btrfs: cleanup of function where fixup_low_keys() is called

If argument 'trans' is unnecessary in the function where
fixup_low_keys() is called, 'trans' is deleted.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index bea20fe..40692f6 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1752,8 +1752,7 @@
  * helper to update/remove inline back ref
  */
 static noinline_for_stack
-void update_inline_extent_backref(struct btrfs_trans_handle *trans,
-				  struct btrfs_root *root,
+void update_inline_extent_backref(struct btrfs_root *root,
 				  struct btrfs_path *path,
 				  struct btrfs_extent_inline_ref *iref,
 				  int refs_to_mod,
@@ -1809,7 +1808,7 @@
 			memmove_extent_buffer(leaf, ptr, ptr + size,
 					      end - ptr - size);
 		item_size -= size;
-		btrfs_truncate_item(trans, root, path, item_size, 1);
+		btrfs_truncate_item(root, path, item_size, 1);
 	}
 	btrfs_mark_buffer_dirty(leaf);
 }
@@ -1831,7 +1830,7 @@
 					   root_objectid, owner, offset, 1);
 	if (ret == 0) {
 		BUG_ON(owner < BTRFS_FIRST_FREE_OBJECTID);
-		update_inline_extent_backref(trans, root, path, iref,
+		update_inline_extent_backref(root, path, iref,
 					     refs_to_add, extent_op);
 	} else if (ret == -ENOENT) {
 		setup_inline_extent_backref(trans, root, path, iref, parent,
@@ -1871,7 +1870,7 @@
 
 	BUG_ON(!is_data && refs_to_drop != 1);
 	if (iref) {
-		update_inline_extent_backref(trans, root, path, iref,
+		update_inline_extent_backref(root, path, iref,
 					     -refs_to_drop, NULL);
 	} else if (is_data) {
 		ret = remove_extent_data_ref(trans, root, path, refs_to_drop);