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uid_cputime: fix cputime overflow

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Converting cputime_t to usec caused overflow when the value is greater
than 1 hour. Use msec and convert to unsigned long long to support bigger
range.

Bug: 22461683

Change-Id: I853fe3e8e7dbf0d3e2cc5c6f9688a5a6e1f1fb3e
Signed-off-by: Jin Qian <jinqian@google.com>
Git-commit: 75bf23fe4bfb1805b411965b5ce3c4b81b957898
Git-repo: https://android.googlesource.com/kernel/common.git
Signed-off-by: Ian Maund <imaund@codeaurora.org>
This commit is contained in:
Jin Qian 2015-07-13 18:16:55 -07:00 committed by Ian Maund
parent 08d57baa53
commit 7ccf4cfe7c
1 changed files with 6 additions and 4 deletions
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10
drivers/misc/uid_cputime.c
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@ -119,10 +119,12 @@ static int uid_stat_show(struct seq_file *m, void *v)
uid_entry->active_stime;
unsigned long long total_power = uid_entry->power +
uid_entry->active_power;
seq_printf(m, "%d: %u %u %llu\n", uid_entry->uid,
cputime_to_usecs(total_utime),
cputime_to_usecs(total_stime),
total_power);
seq_printf(m, "%d: %llu %llu %llu\n", uid_entry->uid,
(unsigned long long)jiffies_to_msecs(
cputime_to_jiffies(total_utime)) * USEC_PER_MSEC,
(unsigned long long)jiffies_to_msecs(
cputime_to_jiffies(total_stime)) * USEC_PER_MSEC,
total_power);
}
mutex_unlock(&uid_lock);