wb_recent_wait    150 block/blk-wbt.c 	else if (rwb->wc && !wb_recent_wait(rwb))
wb_recent_wait    266 block/blk-wbt.c 		if (stat[WRITE].nr_samples || wb_recent_wait(rwb) ||
wb_recent_wait    480 block/blk-wbt.c 	if ((rw & REQ_HIPRIO) || wb_recent_wait(rwb) || current_is_kswapd())