238 			   struct btrfs_delayed_ref_head *head)  in btrfs_delayed_ref_lock()  argument
244 	if (mutex_trylock(&head->mutex))  in btrfs_delayed_ref_lock()
247 	atomic_inc(&head->node.refs);  in btrfs_delayed_ref_lock()
250 	mutex_lock(&head->mutex);  in btrfs_delayed_ref_lock()
252 	if (!head->node.in_tree) {  in btrfs_delayed_ref_lock()
253 		mutex_unlock(&head->mutex);  in btrfs_delayed_ref_lock()
254 		btrfs_put_delayed_ref(&head->node);  in btrfs_delayed_ref_lock()
257 	btrfs_put_delayed_ref(&head->node);  in btrfs_delayed_ref_lock()
263 				    struct btrfs_delayed_ref_head *head,  in drop_delayed_ref()  argument
267 		head = btrfs_delayed_node_to_head(ref);  in drop_delayed_ref()
268 		rb_erase(&head->href_node, &delayed_refs->href_root);  in drop_delayed_ref()
270 		assert_spin_locked(&head->lock);  in drop_delayed_ref()
271 		rb_erase(&ref->rb_node, &head->ref_root);  in drop_delayed_ref()
282 		     struct btrfs_delayed_ref_head *head,  in merge_ref()  argument
314 		drop_delayed_ref(trans, delayed_refs, head, next);  in merge_ref()
317 			drop_delayed_ref(trans, delayed_refs, head, ref);  in merge_ref()
334 			      struct btrfs_delayed_ref_head *head)  in btrfs_merge_delayed_refs()  argument
339 	assert_spin_locked(&head->lock);  in btrfs_merge_delayed_refs()
344 	if (head->is_data)  in btrfs_merge_delayed_refs()
357 	node = rb_first(&head->ref_root);  in btrfs_merge_delayed_refs()
366 		if (merge_ref(trans, delayed_refs, head, ref, seq))  in btrfs_merge_delayed_refs()
367 			node = rb_first(&head->ref_root);  in btrfs_merge_delayed_refs()
401 	struct btrfs_delayed_ref_head *head;  in btrfs_select_ref_head()  local
409 	head = find_ref_head(&delayed_refs->href_root, start, 1);  in btrfs_select_ref_head()
410 	if (!head && !loop) {  in btrfs_select_ref_head()
414 		head = find_ref_head(&delayed_refs->href_root, start, 1);  in btrfs_select_ref_head()
415 		if (!head)  in btrfs_select_ref_head()
417 	} else if (!head && loop) {  in btrfs_select_ref_head()
421 	while (head->processing) {  in btrfs_select_ref_head()
424 		node = rb_next(&head->href_node);  in btrfs_select_ref_head()
433 		head = rb_entry(node, struct btrfs_delayed_ref_head,  in btrfs_select_ref_head()
437 	head->processing = 1;  in btrfs_select_ref_head()
440 	delayed_refs->run_delayed_start = head->node.bytenr +  in btrfs_select_ref_head()
441 		head->node.num_bytes;  in btrfs_select_ref_head()
442 	return head;  in btrfs_select_ref_head()
456 		    struct btrfs_delayed_ref_head *head,  in update_existing_ref()  argument
469 			drop_delayed_ref(trans, delayed_refs, head, existing);  in update_existing_ref()