791 	int old = atomic_read(&blkg->use_delay);  in blkcg_unuse_delay()  local
793 	if (old == 0)  in blkcg_unuse_delay()
803 	while (old) {  in blkcg_unuse_delay()
804 		int cur = atomic_cmpxchg(&blkg->use_delay, old, old - 1);  in blkcg_unuse_delay()
805 		if (cur == old)  in blkcg_unuse_delay()
807 		old = cur;  in blkcg_unuse_delay()
810 	if (old == 0)  in blkcg_unuse_delay()
812 	if (old == 1)  in blkcg_unuse_delay()
819 	int old = atomic_read(&blkg->use_delay);  in blkcg_clear_delay()  local
820 	if (!old)  in blkcg_clear_delay()
823 	while (old) {  in blkcg_clear_delay()
824 		int cur = atomic_cmpxchg(&blkg->use_delay, old, 0);  in blkcg_clear_delay()
825 		if (cur == old) {  in blkcg_clear_delay()
829 		old = cur;  in blkcg_clear_delay()