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fs/proc/uptime.c

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{

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        struct timespec uptime;

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        struct timespec idle;

 

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        cputime64_t idletime;

 

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        u64 nsec;

 

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        u32 rem;

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        int i;

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        cputime_t idletime = cputime_zero;

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        idletime = 0;

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        for_each_possible_cpu(i)

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                idletime = cputime64_add(idletime, kstat_cpu(i).cpustat.idle);

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        do_posix_clock_monotonic_gettime(&uptime);

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        monotonic_to_bootbased(&uptime);

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        cputime_to_timespec(idletime, &idle);

 

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        nsec = cputime64_to_jiffies64(idletime) * TICK_NSEC;

 

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        idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);

 

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        idle.tv_nsec = rem;

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        seq_printf(m, "%lu.%02lu %lu.%02lu\n",

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                        (unsigned long) uptime.tv_sec,

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                        (uptime.tv_nsec / (NSEC_PER_SEC / 100)),

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