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

Thomas Gleixner tglx at linutronix.de
Mon Jun 29 02:24:36 PDT 2015

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.



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