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time: Avoid scary backtraces when warning of > 11% adj

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Folks have been getting a number of warnings about time
adjustments > 11%. The WARN_ON leaves a big useless backtrace
so this patch removes it for a printk_once().

I'm still working to narrow down the cause of the > 11% adjustment.

Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2012-03-22 19:14:46 -07:00
parent ad30dfa94c
commit e919cfd42d
1 changed files with 6 additions and 4 deletions
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10
kernel/time/timekeeping.c
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@ -869,13 +869,15 @@ static void timekeeping_adjust(s64 offset)
} else /* No adjustment needed */
return;
WARN_ONCE(timekeeper.clock->maxadj &&
(timekeeper.mult + adj > timekeeper.clock->mult +
timekeeper.clock->maxadj),
"Adjusting %s more then 11%% (%ld vs %ld)\n",
if (unlikely(timekeeper.clock->maxadj &&
(timekeeper.mult + adj >
timekeeper.clock->mult + timekeeper.clock->maxadj))) {
printk_once(KERN_WARNING
"Adjusting %s more than 11%% (%ld vs %ld)\n",
timekeeper.clock->name, (long)timekeeper.mult + adj,
(long)timekeeper.clock->mult +
timekeeper.clock->maxadj);
}
/*
* So the following can be confusing.
*