624 	struct btrfs_delayed_ref_node *exist;  in insert_delayed_ref()  local
628 	exist = tree_insert(&href->ref_tree, ref);  in insert_delayed_ref()
629 	if (!exist) {  in insert_delayed_ref()
639 	if (exist->action == ref->action) {  in insert_delayed_ref()
643 		if (exist->ref_mod < ref->ref_mod) {  in insert_delayed_ref()
644 			exist->action = ref->action;  in insert_delayed_ref()
645 			mod = -exist->ref_mod;  in insert_delayed_ref()
646 			exist->ref_mod = ref->ref_mod;  in insert_delayed_ref()
648 				list_add_tail(&exist->add_list,  in insert_delayed_ref()
651 				ASSERT(!list_empty(&exist->add_list));  in insert_delayed_ref()
652 				list_del_init(&exist->add_list);  in insert_delayed_ref()
659 	exist->ref_mod += mod;  in insert_delayed_ref()
662 	if (exist->ref_mod == 0)  in insert_delayed_ref()
663 		drop_delayed_ref(trans->fs_info, root, href, exist);  in insert_delayed_ref()
1230 			 * ref doesn't exist.  in btrfs_find_delayed_tree_ref()