linux-kernel - Re: [RESEND PATCH v3] clocksource: exynos_mct: fix for sleeping in atomic ctx handling cpu hotplug notif.

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Message-ID: <55910DA6.4070404@linaro.org>
Date:	Mon, 29 Jun 2015 11:19:34 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Damian Eppel <d.eppel@...sung.com>, tglx@...utronix.de,
	kgene@...nel.org, k.kozlowski@...sung.com,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
CC:	m.szyprowski@...sung.com, kyungmin.park@...sung.com,
	m.jabrzyk@...sung.com, stable@...r.kernel.org
Subject: Re: [RESEND PATCH v3] clocksource: exynos_mct: fix for sleeping in
 atomic ctx handling cpu hotplug notif.

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@ ?



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