linux-kernel - Re: patch md-raid5-allow-for-more-than-2-31-chunks.patch added to 2.6.33-stable tree

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Date:	Thu, 22 Apr 2010 20:11:00 -0700
From:	Greg KH <gregkh@...e.de>
To:	Stefan Lippers-Hollmann <s.L-H@....de>
Cc:	Neil Brown <neilb@...e.de>, linux-kernel@...r.kernel.org,
	king.br@...il.com, stable@...nel.org
Subject: Re: patch md-raid5-allow-for-more-than-2-31-chunks.patch added to
	2.6.33-stable tree

On Thu, Apr 22, 2010 at 01:36:26PM +0200, Stefan Lippers-Hollmann wrote:
> Hi
> 
> On Thursday 22 April 2010, Neil Brown wrote:
> > On Thu, 22 Apr 2010 04:08:30 +0200
> > "Stefan Lippers-Hollmann" <s.L-H@....de> wrote:
> > > On Thursday 22 April 2010, gregkh@...e.de wrote:
> [...]
> > > > From 35f2a591192d0a5d9f7fc696869c76f0b8e49c3d Mon Sep 17 00:00:00 2001
> > > > From: NeilBrown <neilb@...e.de>
> > > > Date: Tue, 20 Apr 2010 14:13:34 +1000
> > > > Subject: md/raid5: allow for more than 2^31 chunks.
> > > > 
> > > > From: NeilBrown <neilb@...e.de>
> > > > 
> > > > commit 35f2a591192d0a5d9f7fc696869c76f0b8e49c3d upstream.
> > > > 
> > > > With many large drives and small chunk sizes it is possible
> > > > to create a RAID5 with more than 2^31 chunks.  Make sure this
> > > > works.
> > > > 
> > > > Reported-by: Brett King <king.br@...il.com>
> > > > Signed-off-by: NeilBrown <neilb@...e.de>
> > > > Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> > > 
> > > This patch, as part of the current 2.6.33 stable queue, breaks compiling
> > > on i386 (CONFIG_LBDAF=y) for me (amd64 builds fine):
> > > 
> > > [...]
> > >   BUILD   arch/x86/boot/bzImage
> > > Root device is (254, 6)
> > > Setup is 12700 bytes (padded to 12800 bytes).
> > > System is 2415 kB
> > > CRC db6fa5fa
> > > Kernel: arch/x86/boot/bzImage is ready  (#1)
> > > ERROR: "__umoddi3" [drivers/md/raid456.ko] undefined!
> > > 
> > > reverting just this patch fixes the problem for me.
> > 
> > Thanks for testing and reporting.
> > 
> > If you could verify that this additional patch fixes the compile error I
> > would really appreciate it.
> 
> I can confirm that this patch on top of the original 
> md-raid5-allow-for-more-than-2-31-chunks.patch fixes the build problem on 
> i386 for me (amd64 continues to build fine as well).
> 
> Tested-by: Stefan Lippers-Hollmann <s.l-h@....de>

Neil, care to push this to Linus?

thanks,

greg k-h
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