Re: EDAC lockdep splat

From: Borislav Petkov
Date: Wed Jul 10 2013 - 06:41:36 EST


Forgot to CC him.

On Wed, Jul 10, 2013 at 12:39:15PM +0200, Borislav Petkov wrote:
> On Wed, Jul 10, 2013 at 11:57:33AM +0200, Markus Trippelsdorf wrote:
> > While debugging an unrelated issue I came across the following lockdep
> > splat:
>
> â
>
> > Jul 10 11:38:00 x4 kernel: BUG: key ffff8802169693f8 not in .data!
> > Jul 10 11:38:00 x4 kernel: ------------[ cut here ]------------
> > Jul 10 11:38:00 x4 kernel: WARNING: CPU: 3 PID: 1 at kernel/lockdep.c:2987 lockdep_init_map+0x45e/0x490()
> > Jul 10 11:38:00 x4 kernel: sda: unknown partition table
> > Jul 10 11:38:00 x4 kernel: DEBUG_LOCKS_WARN_ON(1)
>
> I know: http://marc.info/?l=linux-kernel&m=136809709202740&w=2
>
> I was expecting Mauro to fix it since his patches grew this out:
>
> commit 7a623c039075e4ea21648d88133fafa6dcfd113d
> Author: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> Date: Mon Apr 16 16:41:11 2012 -0300
>
> edac: rewrite the sysfs code to use struct device
>
> adds struct bus_type to struct mem_ctl_info which is dynamically
> allocated and that's why lockdep complains.
>
> bus_register() needs to get a statically allocated struct bus_type as
> the rest of the kernel does it.

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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