time_to_us        197 kernel/trace/trace_hwlat.c 			diff = time_to_us(time_sub(t1, last_t2));
time_to_us        208 kernel/trace/trace_hwlat.c 		total = time_to_us(time_sub(t2, start)); /* sample width */
time_to_us        218 kernel/trace/trace_hwlat.c 		diff = time_to_us(time_sub(t2, t1));     /* current diff */