* Return 0 for insert.
  * Return >0 for merge.
  */
-static int insert_delayed_ref(struct btrfs_trans_handle *trans,
-                             struct btrfs_delayed_ref_root *root,
+static int insert_delayed_ref(struct btrfs_delayed_ref_root *root,
                              struct btrfs_delayed_ref_head *href,
                              struct btrfs_delayed_ref_node *ref)
 {
        head_ref = add_delayed_ref_head(trans, head_ref, record,
                                        action, &qrecord_inserted);
 
-       ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);
+       ret = insert_delayed_ref(delayed_refs, head_ref, &ref->node);
        spin_unlock(&delayed_refs->lock);
 
        /*
        head_ref = add_delayed_ref_head(trans, head_ref, record,
                                        action, &qrecord_inserted);
 
-       ret = insert_delayed_ref(trans, delayed_refs, head_ref, &ref->node);
+       ret = insert_delayed_ref(delayed_refs, head_ref, &ref->node);
        spin_unlock(&delayed_refs->lock);
 
        /*