Message-ID: <46CE1541.6040809@goop.org>
Date: Thu, 23 Aug 2007 16:16:17 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: Frederik Deweerdt <deweerdt@free.fr>
CC: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [-mm patch] enforce noreplace-smp in alternative_instructions()
References: <20070822020648.5ea3a612.akpm@linux-foundation.org> <20070822202551.GB31846@slug>
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Frederik Deweerdt wrote:
> On Wed, Aug 22, 2007 at 02:06:48AM -0700, Andrew Morton wrote:
>   
>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/
>>
>>     
> Hi Jeremy,
>
> arch/i386/kernel/alternative.c:alternative_instructions() doesn't
> check for noreplace-smp before setting capability bits and freeing the
> __smp_locks section.
>
> Every call to alternatives_smp_unlock() checks for noreplace-smp
> beforehand, so remove the check from there.
>
> Boot tested on i386 with UP+noreplace-smp (lguest) and SMP (real hardware)
>   

Does this fix a real problem?  Or is there just some redundancy? 
Wouldn't it be better to put the noreplace_smp test in one place?

    J
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