From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f48.google.com ([74.125.82.48]:34911 "EHLO mail-wg0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753358AbbF2JTa (ORCPT ); Mon, 29 Jun 2015 05:19:30 -0400 Received: by wgjx7 with SMTP id x7so62422416wgj.2 for ; Mon, 29 Jun 2015 02:19:29 -0700 (PDT) Message-ID: <55910DA6.4070404@linaro.org> Date: Mon, 29 Jun 2015 11:19:34 +0200 From: Daniel Lezcano MIME-Version: 1.0 To: Damian Eppel , tglx@linutronix.de, kgene@kernel.org, k.kozlowski@samsung.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org CC: 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. References: <1426151496-5509-1-git-send-email-d.eppel@samsung.com> <1435324984-7328-1-git-send-email-d.eppel@samsung.com> In-Reply-To: <1435324984-7328-1-git-send-email-d.eppel@samsung.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 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@ ? -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog