linux-kernel - Re: [uml-devel] [PATCH resend] um, hweight: Fix UML boot crash

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Message-ID: <20100609093257.GA6292@cr0.nay.redhat.com>
Date:	Wed, 9 Jun 2010 17:32:57 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Boaz Harrosh <bharrosh@...asas.com>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Toralf Förster <toralf.foerster@....de>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Jeff Dike <jdike@...toit.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [uml-devel] [PATCH resend] um, hweight: Fix UML boot crash

On Wed, Jun 09, 2010 at 10:46:01AM +0200, Geert Uytterhoeven wrote:
>On Wed, Jun 9, 2010 at 10:09, Boaz Harrosh <bharrosh@...asas.com> wrote:
>> On 06/09/2010 11:04 AM, Boaz Harrosh wrote:
>>> From: Borislav Petkov <bp@...en8.de>
>>>
>>> Obviously UML cannot stomach callee reg-saving trickery
>>> introduced with d61931d89be506372d01a90d1755f6d0a9fafe2d
>>> (x86: Add optimized popcnt variants) and oopses during boot:
>>> http://marc.info/?l=linux-kernel&m=127522065202435&w=2
>>>
>>> Redirect arch_hweight.h include from the x86 portion to the generic
>>> arch_hweight.h which is a fallback to the software hweight routines.
>>>
>>> LKML-Reference: <201005271944.09541.toralf.foerster@....de>
>>> Signed-off-by: Borislav Petkov <bp@...en8.de>
>
>Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>
>> who's going to push this ASAP. I was just (again) 3/4 through a bisect
>> on 2.6.35-rc2. When I finally realized "Hey that patch, I forgot".
>> (My concentration is not what it used to be)
>>
>> Please push this, someone
>
>Peter, are you happy with this?
>Although we still don't know why UML cannot grok it, it does fix a
>regression in post-2.6.34.
>

Usually Andrew should take UML patches.
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