477 void clear_bdi_congested(struct backing_dev_info *bdi, int sync)  in clear_bdi_congested()  argument
480 	wait_queue_head_t *wqh = &congestion_wqh[sync];  in clear_bdi_congested()
482 	bit = sync ? BDI_sync_congested : BDI_async_congested;  in clear_bdi_congested()
484 		atomic_dec(&nr_bdi_congested[sync]);  in clear_bdi_congested()
491 void set_bdi_congested(struct backing_dev_info *bdi, int sync)  in set_bdi_congested()  argument
495 	bit = sync ? BDI_sync_congested : BDI_async_congested;  in set_bdi_congested()
497 		atomic_inc(&nr_bdi_congested[sync]);  in set_bdi_congested()
510 long congestion_wait(int sync, long timeout)  in congestion_wait()  argument
515 	wait_queue_head_t *wqh = &congestion_wqh[sync];  in congestion_wait()
546 long wait_iff_congested(struct zone *zone, int sync, long timeout)  in wait_iff_congested()  argument
551 	wait_queue_head_t *wqh = &congestion_wqh[sync];  in wait_iff_congested()
558 	if (atomic_read(&nr_bdi_congested[sync]) == 0 ||  in wait_iff_congested()