linux-kernel - Re: link error : 2.6.21-rc6-mm1 for s390

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Message-Id: <20070410.190528.91443205.davem@davemloft.net>
Date:	Tue, 10 Apr 2007 19:05:28 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	mathieu.desnoyers@...ymtl.ca, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, shemminger@...ux-foundation.org,
	heiko.carstens@...ibm.com
Subject: Re: link error : 2.6.21-rc6-mm1 for s390

From: Andrew Morton <akpm@...ux-foundation.org>
Date: Tue, 10 Apr 2007 18:47:38 -0700

> On Tue, 10 Apr 2007 18:36:29 -0700 (PDT)
> David Miller <davem@...emloft.net> wrote:
> 
> > From: Andrew Morton <akpm@...ux-foundation.org>
> > Date: Tue, 10 Apr 2007 18:29:37 -0700
> > 
> > > git-net.patch implements generic lib/div64.c, but s390 also has a
> > > private one.  Presumably the appropriate fix is to remove s390's
> > > private implementation within davem's tree.
> > 
> > The s390 version seems to be optimized in assembler for that
> > processor, therefore we should probably instead elide the
> > generic version on s390.
> 
> We're sure that it has the same API?

Yes, I read over it, I'm pretty sure it does.

> attribute(weak) would give a nicer result?

I'm not so sure.

> We'd also need to remove s390's EXPORT_SYMBOL(__div64_32), so s390 ends up
> using lib/div64.c's EXPORT_SYMBOL().

It shouldn't matter if we use s390's or the generic version's....

Oh, I see, s390 uses lib-y for it's div64.o object, that's a bug.
I'll fix that up, thanks Andrew.
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