182 static inline struct iolatency_grp *blkg_to_lat(struct blkcg_gq *blkg)  in blkg_to_lat()  argument
184 	return pd_to_lat(blkg_to_pd(blkg, &blkcg_policy_iolatency));  in blkg_to_lat()
463 	struct blkcg_gq *blkg = bio->bi_blkg;  in blkcg_iolatency_throttle()  local
469 	while (blkg && blkg->parent) {  in blkcg_iolatency_throttle()
470 		struct iolatency_grp *iolat = blkg_to_lat(blkg);  in blkcg_iolatency_throttle()
472 			blkg = blkg->parent;  in blkcg_iolatency_throttle()
479 		blkg = blkg->parent;  in blkcg_iolatency_throttle()
522 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_check_latencies()  local
539 	parent = blkg_to_lat(blkg->parent);  in iolatency_check_latencies()
590 	struct blkcg_gq *blkg;  in blkcg_iolatency_done_bio()  local
599 	blkg = bio->bi_blkg;  in blkcg_iolatency_done_bio()
600 	if (!blkg || !bio_flagged(bio, BIO_TRACKED))  in blkcg_iolatency_done_bio()
612 	while (blkg && blkg->parent) {  in blkcg_iolatency_done_bio()
613 		iolat = blkg_to_lat(blkg);  in blkcg_iolatency_done_bio()
615 			blkg = blkg->parent;  in blkcg_iolatency_done_bio()
638 		blkg = blkg->parent;  in blkcg_iolatency_done_bio()
660 	struct blkcg_gq *blkg;  in blkiolatency_timer_fn()  local
665 	blkg_for_each_descendant_pre(blkg, pos_css,  in blkiolatency_timer_fn()
676 		if (!blkg_tryget(blkg))  in blkiolatency_timer_fn()
679 		iolat = blkg_to_lat(blkg);  in blkiolatency_timer_fn()
713 		blkg_put(blkg);  in blkiolatency_timer_fn()
751 static int iolatency_set_min_lat_nsec(struct blkcg_gq *blkg, u64 val)  in iolatency_set_min_lat_nsec()  argument
753 	struct iolatency_grp *iolat = blkg_to_lat(blkg);  in iolatency_set_min_lat_nsec()
764 		blkcg_clear_delay(blkg);  in iolatency_set_min_lat_nsec()
770 static void iolatency_clear_scaling(struct blkcg_gq *blkg)  in iolatency_clear_scaling()  argument
772 	if (blkg->parent) {  in iolatency_clear_scaling()
773 		struct iolatency_grp *iolat = blkg_to_lat(blkg->parent);  in iolatency_clear_scaling()
792 	struct blkcg_gq *blkg;  in iolatency_set_limit()  local
805 	iolat = blkg_to_lat(ctx.blkg);  in iolatency_set_limit()
831 	blkg = ctx.blkg;  in iolatency_set_limit()
834 	enable = iolatency_set_min_lat_nsec(blkg, lat_val);  in iolatency_set_limit()
836 		if (!blk_get_queue(blkg->q)) {  in iolatency_set_limit()
841 		blkg_get(blkg);  in iolatency_set_limit()
845 		iolatency_clear_scaling(blkg);  in iolatency_set_limit()
852 		struct iolatency_grp *tmp = blkg_to_lat(blkg);  in iolatency_set_limit()
855 		blk_mq_freeze_queue(blkg->q);  in iolatency_set_limit()
864 		blk_mq_unfreeze_queue(blkg->q);  in iolatency_set_limit()
866 		blkg_put(blkg);  in iolatency_set_limit()
867 		blk_put_queue(blkg->q);  in iolatency_set_limit()
876 	const char *dname = blkg_dev_name(pd->blkg);  in iolatency_prfill_limit()
963 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_pd_init()  local
964 	struct rq_qos *rqos = blkcg_rq_qos(blkg->q);  in iolatency_pd_init()
969 	if (blk_queue_nonrot(blkg->q))  in iolatency_pd_init()
983 	iolat->rq_depth.queue_depth = blkg->q->nr_requests;  in iolatency_pd_init()
994 	if (blkg->parent && blkg_to_pd(blkg->parent, &blkcg_policy_iolatency)) {  in iolatency_pd_init()
995 		struct iolatency_grp *parent = blkg_to_lat(blkg->parent);  in iolatency_pd_init()
1008 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_pd_offline()  local
1012 	ret = iolatency_set_min_lat_nsec(blkg, 0);  in iolatency_pd_offline()
1017 	iolatency_clear_scaling(blkg);  in iolatency_pd_offline()