264 static inline bool stat_sample_valid(struct blk_rq_stat *stat)  in stat_sample_valid()  argument
272 	return (stat[READ].nr_samples >= 1 &&  in stat_sample_valid()
273 		stat[WRITE].nr_samples >= RWB_MIN_WRITE_SAMPLES);  in stat_sample_valid()
304 static int latency_exceeded(struct rq_wb *rwb, struct blk_rq_stat *stat)  in latency_exceeded()  argument
321 	    (thislat > rwb->min_lat_nsec && !stat[READ].nr_samples)) {  in latency_exceeded()
329 	if (!stat_sample_valid(stat)) {  in latency_exceeded()
336 		if (stat[WRITE].nr_samples || wb_recent_wait(rwb) ||  in latency_exceeded()
345 	if (stat[READ].min > rwb->min_lat_nsec) {  in latency_exceeded()
346 		trace_wbt_lat(bdi, stat[READ].min);  in latency_exceeded()
347 		trace_wbt_stat(bdi, stat);  in latency_exceeded()
352 		trace_wbt_stat(bdi, stat);  in latency_exceeded()
432 	status = latency_exceeded(rwb, cb->stat);  in wb_timer_fn()