From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756103AbcANQ4S (ORCPT ); Thu, 14 Jan 2016 11:56:18 -0500 Received: from www.linutronix.de ([62.245.132.108]:58575 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755469AbcANQzo (ORCPT ); Thu, 14 Jan 2016 11:55:44 -0500 Message-Id: <20160114164159.528222587@linutronix.de> User-Agent: quilt/0.63-1 Date: Thu, 14 Jan 2016 16:54:48 -0000 From: Thomas Gleixner To: LKML Cc: Ingo Molnar , Peter Zijlstra , Helge Deller , John Stultz , linux-m68k@vger.kernel.org, dhowells@redhat.com Subject: [patch 4/4] itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper References: <20160114163744.582215466@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=itimers--Handle-relative-timers-with-CONFIG_TIME_LOW_RES-proper.patch X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001,URIBL_BLOCKED=0.001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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