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itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper

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As Helge reported for timerfd we have the same issue in itimers. We return
remaining time larger than the programmed relative time to user space in case
of CONFIG_TIME_LOW_RES=y. Use the proper function to adjust the extra time
added in hrtimer_start_range_ns().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Helge Deller <deller@gmx.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: linux-m68k@lists.linux-m68k.org
Cc: dhowells@redhat.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20160114164159.528222587@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-01-14 16:54:48 +00:00
parent 572c391726
commit 51cbb5242a
1 changed files with 1 additions and 1 deletions
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2
kernel/time/itimer.c
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@ -26,7 +26,7 @@
*/
static struct timeval itimer_get_remtime(struct hrtimer *timer)
{
ktime_t rem = hrtimer_get_remaining(timer);
ktime_t rem = __hrtimer_get_remaining(timer, true);
/*
* Racy but safe: if the itimer expires after the above