From mboxrd@z Thu Jan 1 00:00:00 1970 From: daniel.lezcano@linaro.org (Daniel Lezcano) Date: Mon, 29 Jun 2015 12:14:27 +0200 Subject: [RESEND PATCH v3] clocksource: exynos_mct: fix for sleeping in atomic ctx handling cpu hotplug notif. In-Reply-To: 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> Message-ID: <55911A83.1080404@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 06/29/2015 11:24 AM, Thomas Gleixner wrote: > 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. Mmmh, yep. I thought I refreshed my branch. Now I see it. Thanks for the heads up. -- Daniel -- Linaro.org ? Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog