linux-kernel - Re: mmotm 2009-06-30-12-50 uploaded

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Message-ID: <30563.1246566065@turing-police.cc.vt.edu>
Date:	Thu, 02 Jul 2009 16:21:05 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org
Subject: Re: mmotm 2009-06-30-12-50 uploaded

On Thu, 02 Jul 2009 12:47:26 PDT, Andrew Morton said:

> apart from having a crappy title, linux-next's
> 
> : commit f29876421ec11f7d66f3d982219ef3af9bcccf32
> : Author: Rusty Russell <rusty@...tcorp.com.au>
> : AuthorDate: Wed Jul 1 12:37:19 2009 +1000
> : Commit: Stephen Rothwell <sfr@...b.auug.org.au>
> : CommitDate: Wed Jul 1 12:37:19 2009 +1000
> :
> : misc:work_on_cpu-acpi
> :
> 
> causes get_throttling() to newly be called from an IPI, and lockdep doesn't
> like irq-disabled interrupt handlers doing local_irq_enable().
> 
> 
> If we rely upon these functions only ever being called from
> smp_call_function_single(), and if smp_call_function_single() is
> correctly implemented, we should be able to do this:

I'll take a leap of faith on the "correctly implemented" part.  However,
I admit I'm probably going to wait till Len or somebody agrees on the
"only calledf from function_single()" part being correct before test-driving
the patch...

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