From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from www.linutronix.de ([62.245.132.108]:57123 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752154AbbF2JYr (ORCPT ); Mon, 29 Jun 2015 05:24:47 -0400 Date: Mon, 29 Jun 2015 11:24:36 +0200 (CEST) From: Thomas Gleixner To: Daniel Lezcano cc: Damian Eppel , kgene@kernel.org, k.kozlowski@samsung.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, m.szyprowski@samsung.com, kyungmin.park@samsung.com, m.jabrzyk@samsung.com, stable@vger.kernel.org Subject: Re: [RESEND PATCH v3] clocksource: exynos_mct: fix for sleeping in atomic ctx handling cpu hotplug notif. In-Reply-To: <55910DA6.4070404@linaro.org> Message-ID: References: <1426151496-5509-1-git-send-email-d.eppel@samsung.com> <1435324984-7328-1-git-send-email-d.eppel@samsung.com> <55910DA6.4070404@linaro.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: stable-owner@vger.kernel.org List-ID: On Mon, 29 Jun 2015, Daniel Lezcano wrote: > On 06/26/2015 03:23 PM, Damian Eppel wrote: > > This is to fix an issue of sleeping in atomic context when processing > > hotplug notifications in Exynos MCT(Multi-Core Timer). > > The issue was reproducible on Exynos 3250 (Rinato board) and Exynos 5420 > > (Arndale Octa board). > > > > Whilst testing cpu hotplug events on kernel configured with DEBUG_PREEMPT > > and DEBUG_ATOMIC_SLEEP we get following BUG message, caused by calling > > request_irq() and free_irq() in the context of hotplug notification > > (which is in this case atomic context). > > Applied as a 4.2 fix. > > Should it be tagged stable@ ? I have that one queued in tip/timers/urgent already. Please check my branches before picking up stuff. Thanks, tglx