1916 void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)  in blk_mq_flush_plug_list()  argument
1920 	if (list_empty(&plug->mq_list))  in blk_mq_flush_plug_list()
1922 	list_splice_init(&plug->mq_list, &list);  in blk_mq_flush_plug_list()
1924 	if (plug->rq_count > 2 && plug->multiple_queues)  in blk_mq_flush_plug_list()
1927 	plug->rq_count = 0;  in blk_mq_flush_plug_list()
2136 static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)  in blk_add_rq_to_plug()  argument
2138 	list_add_tail(&rq->queuelist, &plug->mq_list);  in blk_add_rq_to_plug()
2139 	plug->rq_count++;  in blk_add_rq_to_plug()
2140 	if (!plug->multiple_queues && !list_is_singular(&plug->mq_list)) {  in blk_add_rq_to_plug()
2143 		tmp = list_first_entry(&plug->mq_list, struct request,  in blk_add_rq_to_plug()
2146 			plug->multiple_queues = true;  in blk_add_rq_to_plug()
2155 static inline unsigned short blk_plug_max_rq_count(struct blk_plug *plug)  in blk_plug_max_rq_count()  argument
2157 	if (plug->multiple_queues)  in blk_plug_max_rq_count()
2186 	struct blk_plug *plug;  in blk_mq_submit_bio()  local
2235 	plug = blk_mq_plug(q, bio);  in blk_mq_submit_bio()
2240 	} else if (plug && (q->nr_hw_queues == 1 ||  in blk_mq_submit_bio()
2250 		unsigned int request_count = plug->rq_count;  in blk_mq_submit_bio()
2256 			last = list_entry_rq(plug->mq_list.prev);  in blk_mq_submit_bio()
2258 		if (request_count >= blk_plug_max_rq_count(plug) || (last &&  in blk_mq_submit_bio()
2260 			blk_flush_plug_list(plug, false);  in blk_mq_submit_bio()
2264 		blk_add_rq_to_plug(plug, rq);  in blk_mq_submit_bio()
2268 	} else if (plug && !blk_queue_nomerges(q)) {  in blk_mq_submit_bio()
2276 		if (list_empty(&plug->mq_list))  in blk_mq_submit_bio()
2280 			plug->rq_count--;  in blk_mq_submit_bio()
2282 		blk_add_rq_to_plug(plug, rq);  in blk_mq_submit_bio()
3970 	if (current->plug)  in blk_poll()
3971 		blk_flush_plug_list(current->plug, false);  in blk_poll()