Re: [patch 1/3] intel_idle: fix API misuse

[Andrew Morton <akpm@linux-foundation.org>]

(let's cc stable on this thread then!)

On Tue, 17 Jan 2012 11:37:58 +0100
Thomas Renninger <trenn@suse.de> wrote:

> On Wednesday, January 11, 2012 12:48:19 AM akpm@linux-foundation.org wrote:
> > From: Shaohua Li <shaohua.li@intel.com>
> > Subject: intel_idle: fix API misuse
> 
> This one looks worth adding:
> CC: stable@vger.kernel.org
> 
>  
> > smp_call_function() only lets all other CPUs execute a specific function,
> > while we expect all CPUs do in intel_idle.  Without the fix, we could have
> > one cpu which has auto_demotion enabled or has no boradcast timer setup. 
> > Usually we don't see impact because auto demotion just harms power and the
> > intel_idle init is called in CPU 0, where boradcast timer delivers
> > interrupt, but this still could be a problem.
> > 
> > Signed-off-by: Shaohua Li <shaohua.li@intel.com>
> > Cc: Len Brown <lenb@kernel.org>
> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> CC: stable@vger.kernel.org
> 

OK.  I think Len is processing these patches at present.  So
stable@vger.kernel.org will see when I've dropped my copy of the patch,
but the version which goes into mainline might be missing the stable
tag.  Hopefully Greg is awake enough to sort out that cryptic messaging!