linux-kernel - Re: >= 2.6.30 broken alpha smp build

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Message-ID: <4A4419AA.2040400@kernel.org>
Date:	Fri, 26 Jun 2009 09:43:22 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	maximilian attems <max@...o.at>, linux-kernel@...r.kernel.org,
	dhowells@...hat.com, ink@...assic.park.msu.ru
Subject: Re: >= 2.6.30 broken alpha smp build

Andrew Morton wrote:
> This is the
> 
> #define PER_CPU_ATTRIBUTES	__used
> 
> in arch/alpha/include/asm/percpu.h, added by 
> 
> commit 9267b4b3880d00dc2dab90f1d817c856939114f7
> Author:     Ivan Kokshaysky <ink@...assic.park.msu.ru>
> AuthorDate: Sat Jun 21 03:25:39 2008 +0400
> Commit:     Linus Torvalds <torvalds@...ux-foundation.org>
> CommitDate: Fri Jun 20 16:46:10 2008 -0700
> 
>     alpha: fix module load failures on smp (bug #10926)
> 
> There's no indication in the changelog why this was added and afacit no
> other architectures do it.  So I'm at a loss to help here. 

The __used attribute is dropped by a patch in percpu patchset as it
caused build warning on my test builds and wasn't even effective
as-was (overriden by later NULL definition).  Ivan, any ideas why it's
there?

Thanks.

-- 
tejun
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