linux-kernel - Re: [SOLVED] kernel module loading does not work with binutils-gold (was Re: [Bug #14626] oops on boot starting udev)

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Message-ID: <1258798113.6842.16.camel@no>
Date:	Sat, 21 Nov 2009 11:08:33 +0100
From:	Soeren Sonnenburg <sonne@...ian.org>
To:	"Justin P\. Mattock" <justinmattock@...il.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Greg KH <greg@...ah.com>, "Rafael J\. Wysocki" <rjw@...k.pl>,
	linux-input@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [SOLVED] kernel module loading does not work with
 binutils-gold (was Re: [Bug #14626] oops on boot starting udev)

On Sat, 2009-11-21 at 01:58 -0800, Justin P. Mattock wrote:
> Soeren Sonnenburg wrote:
> > On Sat, 2009-11-21 at 09:56 +0100, Soeren Sonnenburg wrote:
> >    
> >> On Wed, 2009-11-18 at 18:59 -0800, Dmitry Torokhov wrote:
> >>      
> >>> On Tue, Nov 17, 2009 at 05:06:47AM +0100, Soeren Sonnenburg wrote:
> >>>        
> >>>> On Mon, 2009-11-16 at 20:01 -0800, Dmitry Torokhov wrote:
> >>>>          
> >>>>> On Tue, Nov 17, 2009 at 03:59:03AM +0100, Soeren Sonnenburg wrote:
> >>>>>            
> >>>>>> On Mon, 2009-11-16 at 18:04 -0800, Dmitry Torokhov wrote:
> >>>>>>              
> >>>>>>> On Mon, Nov 16, 2009 at 05:14:55PM -0800, Greg KH wrote:
> >>>>>>>                
> >>>>>>>> On Mon, Nov 16, 2009 at 11:37:48PM +0100, Rafael J. Wysocki wrote:
> >>>>>>>>                  
> >>>>>>>>> This message has been generated automatically as a part of a report
> >>>>>>>>> of recent regressions.
> >>>>>>>>>
> >>>>>>>>> The following bug entry is on the current list of known regressions
> >>>>>>>>> from 2.6.31.  Please verify if it still should be listed and let me know
> >>>>>>>>> (either way).
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=14626
> >>>>>>>>> Subject		: oops on boot starting udev
> >>>>>>>>> Submitter	: Soeren Sonnenburg<sonne@...ian.org>
> >>>>>>>>> Date		: 2009-11-14 10:16 (3 days old)
> >>>>>>>>> References	: http://marc.info/?l=linux-kernel&m=125819380206800&w=4
> >>>>>>>>>                    
> >>>>>>>> This looks like an input core problem, as the evdev module was just
> >>>>>>>> loaded and died.
> >>>>>>>>
> >>>>>>>> Any input developers have any ideas?
> >>>>>>>>
> >>>>>>>>                  
> >>>>>>> Hmm, evdev does:
> >>>>>>>
> >>>>>>> 	dev_set_name(&evdev->dev, "event%d", minor);
> >>>>>>>
> >>>>>>> Not sure how it can go wrong...
> >>>>>>>                
> >>>>>> Anything I should/could do to narrow it down a bit (apart from
> >>>>>> bisecting?).
> >>>>>>
> >>>>>>              
> >>>>> Umm, I looked through the changes between -rc6 and 7 but nothing jumped
> >>>>> out at me... You don't happen to have any local changes in your tree?
> >>>>>            
> >>>> Well only the mouse button #1 emulation - though I don't see what could
> >>>> go wrong there.
> >>>>
> >>>>          
> >>> I have been looking through the changes and I really don't see anything
> >>> suspicious. I am also not hittign this oops on any of my boxes. Any
> >>> chance you could bisect?
> >>>
> >>> Thanks.
> >>>        
> >> Alright so I tried to do a bisect when I noticed that building a knwon
> >> to work -rc5 did no longer work either. Thought it might be a gcc
> >> problem (gcc-4.3 here) so upgraded to 4.4 - same thing.
> >> Then I recognized that it crashes on loading basically *any* module,
> >> tried tun and applesmc. Attaching the crashes...
> >>
> >> I am starting to run out of ideas...
> >>      
> >
> > OK, I've found the culprit: binutils-gold
> >
> > I build all kernels upto and including -rc6 with the old binutils and
> > since then have upgraded to binutils gold 2.20-4 which - in contrast to
> > the old binutils - uses --no-add-needed per default.
> >
> > So I suspect it triggers an error(?) in the way how the kernel links
> > modules: It is now required to provide all needed libraries to the
> > linker when building the modules. I guess this problem could be worked
> > around by adding --add-needed to the LDFLAGS_MODULE ...
> >
> > Soeren
> >    
> tough to say... some how your hitting
>   __wait_status during your initial boot.
> 
> by looking at the comment(in applesmc.c):
> __wait_status - Wait up to 32ms for the status port to get a certain value
>   * (masked with 0x0f), returning zero if the value is obtained.
> 
> maybe your hitting a different value because of binutls.

It could be anything missing...

> (keep in mind I have the latest binutils running on the macbook,
> but nothing switched to gold during compilation time)

Note that everything works fine with the old binutils here too.You will
need binutils gold to see the problem and it is described here too

http://wiki.debian.org/qa.debian.org/FTBFS#A2009-11-02Packagesfailingbecausebinutils-gold.2BAC8-indirectlinking

Soeren
-- 
For the one fact about the future of which we can be certain is that it
will be utterly fantastic. -- Arthur C. Clarke, 1962

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