457 		    struct btrfs_delayed_ref_node *existing,  in update_existing_ref()  argument
460 	if (update->action != existing->action) {  in update_existing_ref()
467 		existing->ref_mod--;  in update_existing_ref()
468 		if (existing->ref_mod == 0)  in update_existing_ref()
469 			drop_delayed_ref(trans, delayed_refs, head, existing);  in update_existing_ref()
471 			WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||  in update_existing_ref()
472 				existing->type == BTRFS_SHARED_BLOCK_REF_KEY);  in update_existing_ref()
474 		WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||  in update_existing_ref()
475 			existing->type == BTRFS_SHARED_BLOCK_REF_KEY);  in update_existing_ref()
483 		existing->ref_mod += update->ref_mod;  in update_existing_ref()
493 			 struct btrfs_delayed_ref_node *existing,  in update_existing_head_ref()  argument
500 	existing_ref = btrfs_delayed_node_to_head(existing);  in update_existing_head_ref()
519 		existing->num_bytes = update->num_bytes;  in update_existing_head_ref()
547 	existing->ref_mod += update->ref_mod;  in update_existing_head_ref()
556 			delayed_refs->pending_csums -= existing->num_bytes;  in update_existing_head_ref()
558 			delayed_refs->pending_csums += existing->num_bytes;  in update_existing_head_ref()
574 	struct btrfs_delayed_ref_head *existing;  in add_delayed_ref_head()  local
630 	existing = htree_insert(&delayed_refs->href_root,  in add_delayed_ref_head()
632 	if (existing) {  in add_delayed_ref_head()
633 		update_existing_head_ref(delayed_refs, &existing->node, ref);  in add_delayed_ref_head()
639 		head_ref = existing;  in add_delayed_ref_head()
662 	struct btrfs_delayed_ref_node *existing;  in add_delayed_tree_ref()  local
697 	existing = tree_insert(&head_ref->ref_root, &ref->rb_node);  in add_delayed_tree_ref()
698 	if (existing) {  in add_delayed_tree_ref()
699 		update_existing_ref(trans, delayed_refs, head_ref, existing,  in add_delayed_tree_ref()
724 	struct btrfs_delayed_ref_node *existing;  in add_delayed_data_ref()  local
762 	existing = tree_insert(&head_ref->ref_root, &ref->rb_node);  in add_delayed_data_ref()
763 	if (existing) {  in add_delayed_data_ref()
764 		update_existing_ref(trans, delayed_refs, head_ref, existing,  in add_delayed_data_ref()