187 static inline struct iolatency_grp *blkg_to_lat(struct blkcg_gq *blkg)  in blkg_to_lat()  argument
189 	return pd_to_lat(blkg_to_pd(blkg, &blkcg_policy_iolatency));  in blkg_to_lat()
468 	struct blkcg_gq *blkg = bio->bi_blkg;  in blkcg_iolatency_throttle()  local
474 	while (blkg && blkg->parent) {  in blkcg_iolatency_throttle()
475 		struct iolatency_grp *iolat = blkg_to_lat(blkg);  in blkcg_iolatency_throttle()
477 			blkg = blkg->parent;  in blkcg_iolatency_throttle()
484 		blkg = blkg->parent;  in blkcg_iolatency_throttle()
527 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_check_latencies()  local
544 	parent = blkg_to_lat(blkg->parent);  in iolatency_check_latencies()
595 	struct blkcg_gq *blkg;  in blkcg_iolatency_done_bio()  local
603 	blkg = bio->bi_blkg;  in blkcg_iolatency_done_bio()
604 	if (!blkg || !bio_flagged(bio, BIO_QOS_THROTTLED))  in blkcg_iolatency_done_bio()
615 	while (blkg && blkg->parent) {  in blkcg_iolatency_done_bio()
616 		iolat = blkg_to_lat(blkg);  in blkcg_iolatency_done_bio()
618 			blkg = blkg->parent;  in blkcg_iolatency_done_bio()
641 		blkg = blkg->parent;  in blkcg_iolatency_done_bio()
664 	struct blkcg_gq *blkg;  in blkiolatency_timer_fn()  local
669 	blkg_for_each_descendant_pre(blkg, pos_css,  in blkiolatency_timer_fn()
680 		if (!blkg_tryget(blkg))  in blkiolatency_timer_fn()
683 		iolat = blkg_to_lat(blkg);  in blkiolatency_timer_fn()
717 		blkg_put(blkg);  in blkiolatency_timer_fn()
794 static void iolatency_set_min_lat_nsec(struct blkcg_gq *blkg, u64 val)  in iolatency_set_min_lat_nsec()  argument
796 	struct iolatency_grp *iolat = blkg_to_lat(blkg);  in iolatency_set_min_lat_nsec()
810 		blkcg_clear_delay(blkg);  in iolatency_set_min_lat_nsec()
816 static void iolatency_clear_scaling(struct blkcg_gq *blkg)  in iolatency_clear_scaling()  argument
818 	if (blkg->parent) {  in iolatency_clear_scaling()
819 		struct iolatency_grp *iolat = blkg_to_lat(blkg->parent);  in iolatency_clear_scaling()
838 	struct blkcg_gq *blkg;  in iolatency_set_limit()  local
850 	iolat = blkg_to_lat(ctx.blkg);  in iolatency_set_limit()
876 	blkg = ctx.blkg;  in iolatency_set_limit()
879 	iolatency_set_min_lat_nsec(blkg, lat_val);  in iolatency_set_limit()
881 		iolatency_clear_scaling(blkg);  in iolatency_set_limit()
892 	const char *dname = blkg_dev_name(pd->blkg);  in iolatency_prfill_limit()
979 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_pd_init()  local
980 	struct rq_qos *rqos = blkcg_rq_qos(blkg->q);  in iolatency_pd_init()
985 	if (blk_queue_nonrot(blkg->q))  in iolatency_pd_init()
999 	iolat->rq_depth.queue_depth = blkg->q->nr_requests;  in iolatency_pd_init()
1010 	if (blkg->parent && blkg_to_pd(blkg->parent, &blkcg_policy_iolatency)) {  in iolatency_pd_init()
1011 		struct iolatency_grp *parent = blkg_to_lat(blkg->parent);  in iolatency_pd_init()
1024 	struct blkcg_gq *blkg = lat_to_blkg(iolat);  in iolatency_pd_offline()  local
1026 	iolatency_set_min_lat_nsec(blkg, 0);  in iolatency_pd_offline()
1027 	iolatency_clear_scaling(blkg);  in iolatency_pd_offline()