From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:51108 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756251AbcBXDyC (ORCPT ); Tue, 23 Feb 2016 22:54:02 -0500 Subject: Patch "posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper" has been added to the 4.4-stable tree To: tglx@linutronix.de, deller@gmx.de, gregkh@linuxfoundation.org, john.stultz@linaro.org, peterz@infradead.org Cc: , From: Date: Tue, 23 Feb 2016 19:24:46 -0800 Message-ID: <14562842867655@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: posix-timers-handle-relative-timers-with-config_time_low_res-proper.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 572c39172684c3711e4a03c9a7380067e2b0661c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 14 Jan 2016 16:54:47 +0000 Subject: posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper From: Thomas Gleixner commit 572c39172684c3711e4a03c9a7380067e2b0661c upstream. As Helge reported for timerfd we have the same issue in posix timers. 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 Cc: Peter Zijlstra Cc: Helge Deller Cc: John Stultz Cc: linux-m68k@lists.linux-m68k.org Cc: dhowells@redhat.com Link: http://lkml.kernel.org/r/20160114164159.450510905@linutronix.de Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- kernel/time/posix-timers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -760,7 +760,7 @@ common_timer_get(struct k_itimer *timr, (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) timr->it_overrun += (unsigned int) hrtimer_forward(timer, now, iv); - remaining = ktime_sub(hrtimer_get_expires(timer), now); + remaining = __hrtimer_expires_remaining_adjusted(timer, now); /* Return 0 only, when the timer is expired and not pending */ if (remaining.tv64 <= 0) { /* Patches currently in stable-queue which might be from tglx@linutronix.de are queue-4.4/itimers-handle-relative-timers-with-config_time_low_res-proper.patch queue-4.4/futex-drop-refcount-if-requeue_pi-acquired-the-rtmutex.patch queue-4.4/x86-mm-pat-avoid-truncation-when-converting-cpa-numpages-to-address.patch queue-4.4/x86-uaccess-64-handle-the-caching-of-4-byte-nocache-copies-properly-in-__copy_user_nocache.patch queue-4.4/timerfd-handle-relative-timers-with-config_time_low_res-proper.patch queue-4.4/posix-timers-handle-relative-timers-with-config_time_low_res-proper.patch queue-4.4/x86-mm-fix-vmalloc_fault-to-handle-large-pages-properly.patch queue-4.4/x86-mm-fix-types-used-in-pgprot-cacheability-flags-translations.patch queue-4.4/x86-uaccess-64-make-the-__copy_user_nocache-assembly-code-more-readable.patch