linux-kernel - Re: [patch 6/6] virtio: fix section mismatch warnings

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Message-ID: <4B4E7B0B.6050305@suse.com>
Date:	Wed, 13 Jan 2010 21:01:47 -0500
From:	Jeff Mahoney <jeffm@...e.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, linux-kernel@...r.kernel.org
Subject: Re: [patch 6/6] virtio: fix section mismatch warnings

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On 01/13/2010 08:07 PM, Andrew Morton wrote:
> On Wed, 13 Jan 2010 21:27:26 +1030
> Rusty Russell <rusty@...tcorp.com.au> wrote:
> 
>> On Wed, 13 Jan 2010 11:19:01 am Jeff Mahoney wrote:
>>>  This patch fixes the following warnings by renaming the driver structures
>>>  to be suffixed with _driver.
>>>
>>>  WARNING: drivers/virtio/virtio_balloon.o(.data+0x88): Section mismatch in reference from the variable virtio_balloon to the function .devexit.text:virtballoon_remove()
>>>
>>>  WARNING: drivers/char/hw_random/virtio-rng.o(.data+0x88): Section mismatch in reference from the variable virtio_rng to the function .devexit.text:virtrng_remove()
>>>
>>> Signed-off-by: Jeff Mahoney <jeffm@...e.com>
>>
>> Acked-by: Rusty Russell <rusty@...tcorp.com.au>
>>
>> Andrew, will you take these?
>>
> 
> umm, sure.  But I wish I knew how the patch worked.  Is there some
> magic sauce which moves a variable called foo_driver into a different
> section or what?
> 
> And if so, what was I doing when that got done :(

It doesn't move it into a different section, it just shuts the warning
up. modpost has a whitelist it uses to ignore the mismatch warning.

- -Jeff

- -- 
Jeff Mahoney
SUSE Labs
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