iowait_usecs 66 fs/proc/stat.c u64 iowait, iowait_usecs = -1ULL; iowait_usecs 69 fs/proc/stat.c iowait_usecs = get_cpu_iowait_time_us(cpu, NULL); iowait_usecs 71 fs/proc/stat.c if (iowait_usecs == -1ULL) iowait_usecs 75 fs/proc/stat.c iowait = iowait_usecs * NSEC_PER_USEC;