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Date: Sat, 6 Aug 2011 16:38:37 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Tejun Heo <tj@kernel.org>
Cc: Rabin Vincent <rabin@rab.in>, linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] stop_machine: build unconditionally if SMP
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On Sat, 6 Aug 2011 10:03:23 +0200 Tejun Heo <tj@kernel.org> wrote:

> Hello,
> 
> On Sat, Aug 06, 2011 at 12:31:13PM +0530, Rabin Vincent wrote:
> > stop_machine() is built for "(SMP && MODULE_UNLOAD) || HOTPLUG_CPU", but
> > is also used by the timekeeping code, the mm code, ftrace, and couple of
> > things in arch/*.  Just build it if we're using SMP, like it's already
> > the case on x86.
> > 
> > Cc: x86@kernel.org
> > Cc: Tejun Heo <tj@kernel.org>
> > Signed-off-by: Rabin Vincent <rabin@rab.in>
> 
> Yeah, looks good to me.
> 
> Acked-by: Tejun Heo <tj@kernel.org>
> 
> Andrew, can you please route this one?
> 

Sure.

The priority is unclear.  It appears that the patch fixes a build error
under sone circumstances in current mainline?