Messages in this thread | | | Date | Mon, 24 Oct 2011 13:45:16 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid of get_online_cpus()/put_online_cpus() |
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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.
Thanks,
tglx
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