linux-kernel - Re: [PATCH] x86,nmi: Fix section mismatch warnings on 32-bit

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Date:	Mon, 11 Jun 2012 10:19:19 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Jan Beulich <JBeulich@...e.com>, x86@...nel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86,nmi: Fix section mismatch warnings on 32-bit


* Don Zickus <dzickus@...hat.com> wrote:

> On Thu, Jun 07, 2012 at 08:48:00AM -0400, Don Zickus wrote:
> > On Thu, Jun 07, 2012 at 03:43:25PM +0800, Li Zhong wrote:
> > > On Wed, 2012-06-06 at 10:03 -0400, Don Zickus wrote:
> > > > On Wed, Jun 06, 2012 at 12:14:33PM +0100, Jan Beulich wrote:
> > > > > > I didn't think it would be compiler dependent as I do not know what
> > > > > > compiler the reporter was using.  I used a RHEL-6 4.4.4 compiler (which
> > > > > > you probably don't have :^) ).
> > > > > 
> > > > > Indeed, somehow I failed to see the obvious - it's commit
> > > > > 72b3fb24713755cf9740b403e95aa67ceedf3509 that causes
> > > > > these problems. Instantiating static data like this just doesn't
> > > > > play with any of the pointers passed being into .init.*.
> > > > > 
> > > > > I'd suggest either open coding register_nmi_handler() (with
> > > > > the static data put into __initdata), or further abstracting it
> > > > > by allowing an optional fifth argument (specifying the section
> > > > > annotation if needed).
> > > > 
> > > > Ah.  Thanks for figuring that out!!  I will post a patch opencoding it.
> > > > 
> > > 
> > > Hi Don, 
> > > 
> > > How about the following patch, adding an optional fifth argument as Jan
> > > mentioned? We don't need change other users of register_nmi_handler(). 
> > 
> > Ah, ok.  I forgot about the variable args syntax.  That works too.  I give
> > a quick test.
> 
> Apparently I was too slow.  Ingo committed my other patch.  I 
> can ask him to revert it and use your smaller/cleaner patch 
> instead?  Or is it big deal to keep the other one?

That's what can happen if patches get sent deep in a thread 
without changing the subject line.

Mind sending a delta patch for it? It appears to be cleaner and 
more flexible.

Thanks,

	Ingo
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