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

From: Thomas Gleixner
Date: Mon Oct 24 2011 - 07:45:23 EST

On Mon, 24 Oct 2011, Yong Zhang wrote:
> On Mon, Oct 24, 2011 at 11:24:51AM +0200, Thomas Gleixner wrote:
> > > 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.
> If so, I think that kind of violation has been caught in mainline,
> because mainline has had CPU_DOWN_PREPARE called under
> cpu_hotplug.lock, right?
> Or am I missing something?

Hmm, no. I obviously forgot that I moved it in RT :(

So yes, it should be safe. Though the question is why cpufreq does not
suffer from that that problem in mainline. I'll stare at that code
some more.


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