From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:38308 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755633AbdLTRUj (ORCPT ); Wed, 20 Dec 2017 12:20:39 -0500 Subject: Patch "cpuidle: fix broadcast control when broadcast can not be entered" has been added to the 4.14-stable tree To: npiggin@gmail.com, alexander.levin@verizon.com, gregkh@linuxfoundation.org, rafael.j.wysocki@intel.com, tglx@linutronix.de Cc: , From: Date: Wed, 20 Dec 2017 18:20:12 +0100 Message-ID: <151379041222111@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 cpuidle: fix broadcast control when broadcast can not be entered to the 4.14-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: cpuidle-fix-broadcast-control-when-broadcast-can-not-be-entered.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Wed Dec 20 18:17:52 CET 2017 From: Nicholas Piggin Date: Fri, 1 Sep 2017 14:29:56 +1000 Subject: cpuidle: fix broadcast control when broadcast can not be entered From: Nicholas Piggin [ Upstream commit f187851b9b4a76952b1158b86434563dd2031103 ] When failing to enter broadcast timer mode for an idle state that requires it, a new state is selected that does not require broadcast, but the broadcast variable remains set. This causes tick_broadcast_exit to be called despite not having entered broadcast mode. This causes the WARN_ON_ONCE(!irqs_disabled()) to trigger in some cases. It does not appear to cause problems for code today, but seems to violate the interface so should be fixed. Signed-off-by: Nicholas Piggin Reviewed-by: Thomas Gleixner Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/cpuidle/cpuidle.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -208,6 +208,7 @@ int cpuidle_enter_state(struct cpuidle_d return -EBUSY; } target_state = &drv->states[index]; + broadcast = false; } /* Take note of the planned idle state. */ Patches currently in stable-queue which might be from npiggin@gmail.com are queue-4.14/cpuidle-fix-broadcast-control-when-broadcast-can-not-be-entered.patch queue-4.14/powerpc-xmon-avoid-tripping-smp-hardlockup-watchdog.patch queue-4.14/powerpc-watchdog-do-not-trigger-smp-crash-from-touch_nmi_watchdog.patch