397 	struct btrfs_delayed_ref_node *exist;  in add_delayed_ref_tail_merge()  local
405 	exist = list_entry(href->ref_list.prev, struct btrfs_delayed_ref_node,  in add_delayed_ref_tail_merge()
408 	if (exist->type != ref->type || exist->seq != ref->seq)  in add_delayed_ref_tail_merge()
411 	if ((exist->type == BTRFS_TREE_BLOCK_REF_KEY ||  in add_delayed_ref_tail_merge()
412 	     exist->type == BTRFS_SHARED_BLOCK_REF_KEY) &&  in add_delayed_ref_tail_merge()
413 	    comp_tree_refs(btrfs_delayed_node_to_tree_ref(exist),  in add_delayed_ref_tail_merge()
417 	if ((exist->type == BTRFS_EXTENT_DATA_REF_KEY ||  in add_delayed_ref_tail_merge()
418 	     exist->type == BTRFS_SHARED_DATA_REF_KEY) &&  in add_delayed_ref_tail_merge()
419 	    comp_data_refs(btrfs_delayed_node_to_data_ref(exist),  in add_delayed_ref_tail_merge()
425 	if (exist->action == ref->action) {  in add_delayed_ref_tail_merge()
429 		if (exist->ref_mod < ref->ref_mod) {  in add_delayed_ref_tail_merge()
430 			exist->action = ref->action;  in add_delayed_ref_tail_merge()
431 			mod = -exist->ref_mod;  in add_delayed_ref_tail_merge()
432 			exist->ref_mod = ref->ref_mod;  in add_delayed_ref_tail_merge()
436 	exist->ref_mod += mod;  in add_delayed_ref_tail_merge()
439 	if (exist->ref_mod == 0)  in add_delayed_ref_tail_merge()
440 		drop_delayed_ref(trans, root, href, exist);  in add_delayed_ref_tail_merge()