902 	 * first place, directly accessing the plug instead of using  in bio_poll()
906 	blk_flush_plug(current->plug, false);  in bio_poll()
1076 void blk_start_plug_nr_ios(struct blk_plug *plug, unsigned short nr_ios)  in blk_start_plug_nr_ios()  argument
1081 	 * If this is a nested plug, don't actually assign it.  in blk_start_plug_nr_ios()
1083 	if (tsk->plug)  in blk_start_plug_nr_ios()
1086 	plug->mq_list = NULL;  in blk_start_plug_nr_ios()
1087 	plug->cached_rq = NULL;  in blk_start_plug_nr_ios()
1088 	plug->nr_ios = min_t(unsigned short, nr_ios, BLK_MAX_REQUEST_COUNT);  in blk_start_plug_nr_ios()
1089 	plug->rq_count = 0;  in blk_start_plug_nr_ios()
1090 	plug->multiple_queues = false;  in blk_start_plug_nr_ios()
1091 	plug->has_elevator = false;  in blk_start_plug_nr_ios()
1092 	INIT_LIST_HEAD(&plug->cb_list);  in blk_start_plug_nr_ios()
1098 	tsk->plug = plug;  in blk_start_plug_nr_ios()
1103  * @plug:	The &struct blk_plug that needs to be initialized
1121  *   plug. By flushing the pending I/O when the process goes to sleep, we avoid
1124 void blk_start_plug(struct blk_plug *plug)  in blk_start_plug()  argument
1126 	blk_start_plug_nr_ios(plug, 1);  in blk_start_plug()
1130 static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule)  in flush_plug_callbacks()  argument
1134 	while (!list_empty(&plug->cb_list)) {  in flush_plug_callbacks()
1135 		list_splice_init(&plug->cb_list, &callbacks);  in flush_plug_callbacks()
1150 	struct blk_plug *plug = current->plug;  in blk_check_plugged()  local
1153 	if (!plug)  in blk_check_plugged()
1156 	list_for_each_entry(cb, &plug->cb_list, list)  in blk_check_plugged()
1166 		list_add(&cb->list, &plug->cb_list);  in blk_check_plugged()
1172 void __blk_flush_plug(struct blk_plug *plug, bool from_schedule)  in __blk_flush_plug()  argument
1174 	if (!list_empty(&plug->cb_list))  in __blk_flush_plug()
1175 		flush_plug_callbacks(plug, from_schedule);  in __blk_flush_plug()
1176 	blk_mq_flush_plug_list(plug, from_schedule);  in __blk_flush_plug()
1183 	if (unlikely(!rq_list_empty(plug->cached_rq)))  in __blk_flush_plug()
1184 		blk_mq_free_plug_rqs(plug);  in __blk_flush_plug()
1189  * @plug:	The &struct blk_plug passed to blk_start_plug()
1197 void blk_finish_plug(struct blk_plug *plug)  in blk_finish_plug()  argument
1199 	if (plug == current->plug) {  in blk_finish_plug()
1200 		__blk_flush_plug(plug, false);  in blk_finish_plug()
1201 		current->plug = NULL;  in blk_finish_plug()