Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid ofget_online_cpus()/put_online_cpus()

From: Thomas Gleixner
Date: Mon Oct 24 2011 - 05:24:57 EST




On Mon, 24 Oct 2011, Yong Zhang wrote:

> On Wed, Oct 19, 2011 at 11:12:20AM +0200, Thomas Gleixner wrote:
> > On Sun, 16 Oct 2011, Yong Zhang wrote:
> >
> > > Fix below false positive (seems this is not a real deadlock scenario)
> > > lockdep warning:
> >
> > This looks like you caused it with patch 1.
>
> Hmmm, yup.
> CPU_DOWN_PREPARE will be under cpu_hotplug.lock.
>
> > Both need a bit more
> > thought, but thanks for catching that.
>
> No sure whether it's big issue or not.
> Mind showing more about your concern?

This is probably not the only place which will run into that issue and
I have not much interest to patch all those sites.

Thanks,

tglx
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