Commit 519ded5a authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Linus Torvalds

procfs: avoid 32-bit time_t in /proc/*/stat

/proc/stat shows (among lots of other things) the current boottime (i.e.
number of seconds since boot).  While a 32-bit number is sufficient for
this particular case, we want to get rid of the 'struct timespec'
suffers from a 32-bit overflow in 2038.

This changes the code to use a struct timespec64, which is known to be
safe in all cases.

Link: default avatarArnd Bergmann <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent ef419398
......@@ -80,19 +80,17 @@ static u64 get_iowait_time(int cpu)
static int show_stat(struct seq_file *p, void *v)
int i, j;
unsigned long jif;
u64 user, nice, system, idle, iowait, irq, softirq, steal;
u64 guest, guest_nice;
u64 sum = 0;
u64 sum_softirq = 0;
unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
struct timespec boottime;
struct timespec64 boottime;
user = nice = system = idle = iowait =
irq = softirq = steal = 0;
guest = guest_nice = 0;
jif = boottime.tv_sec;
for_each_possible_cpu(i) {
user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
......@@ -163,12 +161,12 @@ static int show_stat(struct seq_file *p, void *v)
"\nctxt %llu\n"
"btime %lu\n"
"btime %llu\n"
"processes %lu\n"
"procs_running %lu\n"
"procs_blocked %lu\n",
(unsigned long)jif,
(unsigned long long)boottime.tv_sec,
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