630 	struct blk_plug plug;  in __submit_bio()  local
632 	blk_start_plug(&plug);  in __submit_bio()
649 	blk_finish_plug(&plug);  in __submit_bio()
957 	blk_flush_plug(current->plug, false);  in bio_poll()
1129 void blk_start_plug_nr_ios(struct blk_plug *plug, unsigned short nr_ios)  in blk_start_plug_nr_ios()  argument
1136 	if (tsk->plug)  in blk_start_plug_nr_ios()
1139 	plug->cur_ktime = 0;  in blk_start_plug_nr_ios()
1140 	rq_list_init(&plug->mq_list);  in blk_start_plug_nr_ios()
1141 	rq_list_init(&plug->cached_rqs);  in blk_start_plug_nr_ios()
1142 	plug->nr_ios = min_t(unsigned short, nr_ios, BLK_MAX_REQUEST_COUNT);  in blk_start_plug_nr_ios()
1143 	plug->rq_count = 0;  in blk_start_plug_nr_ios()
1144 	plug->multiple_queues = false;  in blk_start_plug_nr_ios()
1145 	plug->has_elevator = false;  in blk_start_plug_nr_ios()
1146 	INIT_LIST_HEAD(&plug->cb_list);  in blk_start_plug_nr_ios()
1152 	tsk->plug = plug;  in blk_start_plug_nr_ios()
1178 void blk_start_plug(struct blk_plug *plug)  in blk_start_plug()  argument
1180 	blk_start_plug_nr_ios(plug, 1);  in blk_start_plug()
1184 static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule)  in flush_plug_callbacks()  argument
1188 	while (!list_empty(&plug->cb_list)) {  in flush_plug_callbacks()
1189 		list_splice_init(&plug->cb_list, &callbacks);  in flush_plug_callbacks()
1204 	struct blk_plug *plug = current->plug;  in blk_check_plugged()  local
1207 	if (!plug)  in blk_check_plugged()
1210 	list_for_each_entry(cb, &plug->cb_list, list)  in blk_check_plugged()
1220 		list_add(&cb->list, &plug->cb_list);  in blk_check_plugged()
1226 void __blk_flush_plug(struct blk_plug *plug, bool from_schedule)  in __blk_flush_plug()  argument
1228 	if (!list_empty(&plug->cb_list))  in __blk_flush_plug()
1229 		flush_plug_callbacks(plug, from_schedule);  in __blk_flush_plug()
1230 	blk_mq_flush_plug_list(plug, from_schedule);  in __blk_flush_plug()
1237 	if (unlikely(!rq_list_empty(&plug->cached_rqs)))  in __blk_flush_plug()
1238 		blk_mq_free_plug_rqs(plug);  in __blk_flush_plug()
1240 	plug->cur_ktime = 0;  in __blk_flush_plug()
1254 void blk_finish_plug(struct blk_plug *plug)  in blk_finish_plug()  argument
1256 	if (plug == current->plug) {  in blk_finish_plug()
1257 		__blk_flush_plug(plug, false);  in blk_finish_plug()
1258 		current->plug = NULL;  in blk_finish_plug()