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SubjectRe: [PATCH] rtc-tegra: properly initialize spinlock
On Fri, 22 Jul 2011, Sven-Thorsten Dietrich wrote:
>
> On Jul 22, 2011, at 3:13 PM, Andrew Morton wrote:
>
> > On Fri, 22 Jul 2011 10:35:56 +0200
> > Uwe Kleine-K__nig <u.kleine-koenig@pengutronix.de> wrote:
> >
> >> Using __SPIN_LOCK_UNLOCKED for a dynamically allocated lock is wrong and
> >> breaks with PREEMPT_RT_FULL.
> >
> > Please define "breaks". Lockdep warnings? Deadlocks?
>
> Narrr, I think its a compile-time problem with the static initializer.

Correct. The macro expansion magic of the static initializer barfs and
with lockdep the lockdep key assignment is missing.

Thanks,

tglx


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