1049 	u64 bw;  in wb_update_write_bandwidth()  local
1061 	bw = written - min(written, wb->written_stamp);  in wb_update_write_bandwidth()
1062 	bw *= HZ;  in wb_update_write_bandwidth()
1064 		do_div(bw, elapsed);  in wb_update_write_bandwidth()
1065 		avg = bw;  in wb_update_write_bandwidth()
1068 	bw += (u64)wb->write_bandwidth * (period - elapsed);  in wb_update_write_bandwidth()
1069 	bw >>= ilog2(period);  in wb_update_write_bandwidth()
1074 	if (avg > old && old >= (unsigned long)bw)  in wb_update_write_bandwidth()
1077 	if (avg < old && old <= (unsigned long)bw)  in wb_update_write_bandwidth()
1088 	wb->write_bandwidth = bw;  in wb_update_write_bandwidth()
1380 	unsigned long bw = wb->avg_write_bandwidth;  in wb_max_pause()  local
1390 	t = wb_dirty / (1 + bw / roundup_pow_of_two(1 + HZ / 8));  in wb_max_pause()