458 			 struct btrfs_delayed_ref_node *existing,  in update_existing_head_ref()  argument
465 	existing_ref = btrfs_delayed_node_to_head(existing);  in update_existing_head_ref()
484 		existing->num_bytes = update->num_bytes;  in update_existing_head_ref()
512 	existing->ref_mod += update->ref_mod;  in update_existing_head_ref()
521 			delayed_refs->pending_csums -= existing->num_bytes;  in update_existing_head_ref()
523 			delayed_refs->pending_csums += existing->num_bytes;  in update_existing_head_ref()
541 	struct btrfs_delayed_ref_head *existing;  in add_delayed_ref_head()  local
620 	existing = htree_insert(&delayed_refs->href_root,  in add_delayed_ref_head()
622 	if (existing) {  in add_delayed_ref_head()
623 		WARN_ON(ref_root && reserved && existing->qgroup_ref_root  in add_delayed_ref_head()
624 			&& existing->qgroup_reserved);  in add_delayed_ref_head()
625 		update_existing_head_ref(delayed_refs, &existing->node, ref);  in add_delayed_ref_head()
631 		head_ref = existing;  in add_delayed_ref_head()