idle_usecs 50 fs/proc/stat.c u64 idle, idle_usecs = -1ULL; idle_usecs 53 fs/proc/stat.c idle_usecs = get_cpu_idle_time_us(cpu, NULL); idle_usecs 55 fs/proc/stat.c if (idle_usecs == -1ULL) idle_usecs 59 fs/proc/stat.c idle = idle_usecs * NSEC_PER_USEC;