816 	struct blk_plug *plug;  in submit_bio_checks()  local
820 	plug = blk_mq_plug(q, bio);  in submit_bio_checks()
821 	if (plug && plug->nowait)  in submit_bio_checks()
1672  * @plug:	The &struct blk_plug that needs to be initialized
1690  *   plug. By flushing the pending I/O when the process goes to sleep, we avoid
1693 void blk_start_plug(struct blk_plug *plug)  in blk_start_plug()  argument
1698 	 * If this is a nested plug, don't actually assign it.  in blk_start_plug()
1700 	if (tsk->plug)  in blk_start_plug()
1703 	INIT_LIST_HEAD(&plug->mq_list);  in blk_start_plug()
1704 	INIT_LIST_HEAD(&plug->cb_list);  in blk_start_plug()
1705 	plug->rq_count = 0;  in blk_start_plug()
1706 	plug->multiple_queues = false;  in blk_start_plug()
1707 	plug->nowait = false;  in blk_start_plug()
1713 	tsk->plug = plug;  in blk_start_plug()
1717 static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule)  in flush_plug_callbacks()  argument
1721 	while (!list_empty(&plug->cb_list)) {  in flush_plug_callbacks()
1722 		list_splice_init(&plug->cb_list, &callbacks);  in flush_plug_callbacks()
1737 	struct blk_plug *plug = current->plug;  in blk_check_plugged()  local
1740 	if (!plug)  in blk_check_plugged()
1743 	list_for_each_entry(cb, &plug->cb_list, list)  in blk_check_plugged()
1753 		list_add(&cb->list, &plug->cb_list);  in blk_check_plugged()
1759 void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)  in blk_flush_plug_list()  argument
1761 	flush_plug_callbacks(plug, from_schedule);  in blk_flush_plug_list()
1763 	if (!list_empty(&plug->mq_list))  in blk_flush_plug_list()
1764 		blk_mq_flush_plug_list(plug, from_schedule);  in blk_flush_plug_list()
1769  * @plug:	The &struct blk_plug passed to blk_start_plug()
1777 void blk_finish_plug(struct blk_plug *plug)  in blk_finish_plug()  argument
1779 	if (plug != current->plug)  in blk_finish_plug()
1781 	blk_flush_plug_list(plug, false);  in blk_finish_plug()
1783 	current->plug = NULL;  in blk_finish_plug()