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time: Complete NTP adjustment threshold judging conditions

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The clocksource mult-adjustment threshold is [mult-maxadj, mult+maxadj],
timekeeping_adjust() only deals with the upper threshold, but misses the
lower threshold.

This patch adds the lower threshold judging condition.

Signed-off-by: pang.xunlei <pang.xunlei@linaro.org>
[jstultz: Minor fix for > 80 char line]
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
pang.xunlei 2014-10-09 15:04:31 +08:00 committed by John Stultz
parent 6067dc5a8c
commit 659bc17b80
1 changed files with 2 additions and 1 deletions
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3
kernel/time/timekeeping.c
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@ -1403,7 +1403,8 @@ static void timekeeping_adjust(struct timekeeper *tk, s64 offset)
}
if (unlikely(tk->tkr.clock->maxadj &&
(tk->tkr.mult > tk->tkr.clock->mult + tk->tkr.clock->maxadj))) {
(abs(tk->tkr.mult - tk->tkr.clock->mult)
> tk->tkr.clock->maxadj))) {
printk_once(KERN_WARNING
"Adjusting %s more than 11%% (%ld vs %ld)\n",
tk->tkr.clock->name, (long)tk->tkr.mult,