398 	struct iolatency_grp *parent;  in check_scale_change()  local
406 	if (lat_to_blkg(iolat)->parent == NULL)  in check_scale_change()
409 	parent = blkg_to_lat(lat_to_blkg(iolat)->parent);  in check_scale_change()
410 	if (!parent)  in check_scale_change()
413 	lat_info = &parent->child_lat;  in check_scale_change()
474 	while (blkg && blkg->parent) {  in blkcg_iolatency_throttle()
477 			blkg = blkg->parent;  in blkcg_iolatency_throttle()
484 		blkg = blkg->parent;  in blkcg_iolatency_throttle()
528 	struct iolatency_grp *parent;  in iolatency_check_latencies()  local
544 	parent = blkg_to_lat(blkg->parent);  in iolatency_check_latencies()
545 	if (!parent)  in iolatency_check_latencies()
548 	lat_info = &parent->child_lat;  in iolatency_check_latencies()
615 	while (blkg && blkg->parent) {  in blkcg_iolatency_done_bio()
618 			blkg = blkg->parent;  in blkcg_iolatency_done_bio()
641 		blkg = blkg->parent;  in blkcg_iolatency_done_bio()
818 	if (blkg->parent) {  in iolatency_clear_scaling()
819 		struct iolatency_grp *iolat = blkg_to_lat(blkg->parent);  in iolatency_clear_scaling()
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()  local
1013 			   atomic_read(&parent->child_lat.scale_cookie));  in iolatency_pd_init()