linux-kernel - Re: 2.6.27-rc5-mm1: rmmod ide-cd_mod: tried to init an initialized object, something is seriously wrong.

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Date:	Tue, 9 Sep 2008 15:21:42 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Mariusz Kozlowski <m.kozlowski@...land.pl>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>, rjw@...k.pl,
	akpm@...ux-foundation.org, bzolnier@...il.com,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: Re: 2.6.27-rc5-mm1: rmmod ide-cd_mod: tried to init an initialized  object, something is seriously wrong.

On Tue, Sep 09 2008, Mariusz Kozlowski wrote:
> > > On the other hand on newer kernels (post 2.6.26 - these which did not blow up) right
> > > after boot I have to run rmmod ide-cd_mod exactly three times to have ide-cd_mod
> > > unloaded. If I modprobe and rmmod again it works as expected. Why is this?
> > > 
> > > laptop mako # modprobe ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > ERROR: Module ide_cd_mod does not exist in /proc/modules
> > > laptop mako # modprobe ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > laptop mako # rmmod ide-cd_mod
> > > ERROR: Module ide_cd_mod does not exist in /proc/modules
> > 
> > Can you try the below patch from Elias?
> 
> Sure. It applied fine to clean current mainline. It looks ok now. No oopses and no BUGs.
> But still after a fresh boot I see 
> 
> # modprobe ide-cd_mod
> # rmmod ide-cd_mod
> # rmmod ide-cd_mod
> # rmmod ide-cd_mod
> ERROR: Module ide_cd_mod does not exist in /proc/modules
> # modprobe ide-cd_mod
> # rmmod ide-cd_mod
> # rmmod ide-cd_mod
> ERROR: Module ide_cd_mod does not exist in /proc/modules
> 
> You need to rmmod ide-cd_mod twice to get it unloaded. After another
> modprobe/rmmod it works as expected.

Looks like something for Bart to look into.

-- 
Jens Axboe

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