linux-kernel - Re: Linux 2.6.32.55

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Message-ID: <4FE4E4A8.1010105@suse.cz>
Date:	Fri, 22 Jun 2012 23:33:28 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Willy Tarreau <w@....eu>
CC:	Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, lwn@....net,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: Linux 2.6.32.55

On 06/22/2012 11:18 PM, Willy Tarreau wrote:
>> Given nobody noticed till now, I would incline to drop that patch from
>> 2.6.32 series. Opinions?
> 
> Which one would you drop then ? You got me lost now. I mean, since you've
> been the only one to notice an issue, I have no problem with following you
> on the best way to fix it but I need to understand what you want then :-)

Ok, now I spent some time to look into that.

I thought suse does not need the original patch (PNP: work around Dell
1536/1546 BIOS MMCONFIG bug that breaks USB) as we do not support
CONFIG_AMD_NB. But in 2.6.32.55, it is named CONFIG_K8_NB. So actually
we need it.

There are two problems with the backport:
* missing amd_get_mmconfig_range (added by 24d25dbfa6)
* used wrong names: CONFIG_AMD_NB and asm/amd_nb.h

The latter can be fixed in two ways:
* easier: change CONFIG_AMD_NB to CONFIG_K8_NB and asm/amd_nb.h to
asm/k8.h (obviously, there will be no "upstream commit" for that)
* maybe harder: backport 23ac4ae827 including dependencies (I haven't
looked if there are any)

thanks,
-- 
js
suse labs
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