773 	int old = atomic_read(&blkg->use_delay);  in blkcg_unuse_delay()  local
775 	if (old == 0)  in blkcg_unuse_delay()
785 	while (old) {  in blkcg_unuse_delay()
786 		int cur = atomic_cmpxchg(&blkg->use_delay, old, old - 1);  in blkcg_unuse_delay()
787 		if (cur == old)  in blkcg_unuse_delay()
789 		old = cur;  in blkcg_unuse_delay()
792 	if (old == 0)  in blkcg_unuse_delay()
794 	if (old == 1)  in blkcg_unuse_delay()
801 	int old = atomic_read(&blkg->use_delay);  in blkcg_clear_delay()  local
802 	if (!old)  in blkcg_clear_delay()
805 	while (old) {  in blkcg_clear_delay()
806 		int cur = atomic_cmpxchg(&blkg->use_delay, old, 0);  in blkcg_clear_delay()
807 		if (cur == old) {  in blkcg_clear_delay()
811 		old = cur;  in blkcg_clear_delay()