linux-kernel - Re: Dynamic Debug broken on 2.6.35-rc3?

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Date:	Mon, 12 Jul 2010 14:21:46 -0700 (PDT)
From:	Yehuda Sadeh <yehuda@...newdream.net>
To:	Jason Baron <jbaron@...hat.com>
cc:	Thomas Renninger <trenn@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Hannes Reinecke <hare@...e.de>, yehuda@...newdream.net
Subject: Re: Dynamic Debug broken on 2.6.35-rc3?



On Mon, 12 Jul 2010, Jason Baron wrote:
...
> I will re-post the above as a separate thread. Also, I should probably
> post a patch to add myself to the MAINTAINERS file, since I didn't see
> Yehuda's patch until now...

Yeah, I wasn't sure who was responsible for this module. Wasn't clear 
from the log.

>
>> If Yehuda's patch is fixing this already, we still need it backported for
>> 2.6.34 stable kernel and further?
>>
>
> Yes, patch might need to be adjusted a bit but is still relevant for
> 2.6.34 stable. The situation was exacerbated by:
>
> commit 3bafeb6247042dcbb72b0141ec7c7107de9f0b99
> Author: Linus Torvalds <torvalds@...ux-foundation.org>
> Date:   Sat Jun 5 11:17:36 2010 -0600
>
>    module: move find_module check to end
>
> during the 2.6.35 time frame.
>

Right. Looking at the code, pre .35-rc2 loads the dynamic debug code after 
verifying that the module is loadable. So it's a bit harder to hit 
it, although it can still fail at the following module_finalize() or at 
the parse_args(), so the problem is there.

Yehuda
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