linux-kernel - Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid of get_online_cpus()/put_online

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Message-ID: <20111024024416.GB24581@zhy>
Date:	Mon, 24 Oct 2011 10:44:17 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org
Subject: Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid of
 get_online_cpus()/put_online_cpus()

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?

Thanks,
Yong
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