From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: [patch 4/4] itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper Date: Thu, 14 Jan 2016 16:54:48 -0000 Message-ID: <20160114164159.528222587__22932.5709901334$1452790599$gmane$org@linutronix.de> References: <20160114163744.582215466@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Return-path: Content-Disposition: inline; filename=itimers--Handle-relative-timers-with-CONFIG_TIME_LOW_RES-proper.patch Sender: linux-m68k-owner@vger.kernel.org List-Id: linux-m68k@vger.kernel.org To: LKML Cc: Ingo Molnar , Peter Zijlstra , Helge Deller , John Stultz , linux-m68k@lists.linux-m68k.org, dhowells@redhat.com 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 --- kernel/time/itimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/time/itimer.c +++ b/kernel/time/itimer.c @@ -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