linux-kernel - Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171 __ioremap

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Date:	Thu, 10 Jul 2014 10:54:48 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Fabio Coatti <fabio.coatti@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, eranian@...gle.com, mingo@...e.hu,
	acme@...hat.com, ak@...ux.intel.com, zheng.z.yan@...el.com
Subject: Re: WARNING: CPU: 2 PID: 1 at arch/x86/mm/ioremap.c:171
 __ioremap_caller+0x290/0x2fa()

On Thu, Jul 10, 2014 at 10:52:08AM +0200, Peter Zijlstra wrote:
> On Thu, Jul 10, 2014 at 10:44:21AM +0200, Peter Zijlstra wrote:
> > On Wed, Jul 09, 2014 at 12:48:05PM -0700, Fabio Coatti wrote:
> > > In data mercoledì 9 luglio 2014 11:54:21, Greg Kroah-Hartman ha scritto:
> > > 
> > > > Try cc:ing everyone on that patch, with the original information you
> > > > provided, and the linux-kernel mailing list.  Those developers should be
> > > > able to help you out properly.
> > > 
> > > Ok, here you can find the description of a problem that I'm experiencing on 
> > > latest kernels, since 3.15.0.  (this report comes from 3.15.4)
> > > 
> > > lug 07 22:08:00 calvin kernel: resource map sanity check conflict: 0xfed10000 
> > > 0xfed15fff 0xfed10000 0xfed13fff reserved
> > > lug 07 22:08:00 calvin kernel: ------------[ cut here ]------------
> > 
> > I think this is a 'known' issue on Thinkpad (iirc). For some obscure
> > reason its BIOS has funny ideas about resources etc.
> > 
> > I couldn't quickly find the prvious thread, maybe Stephane knows.
> 
> Found it:
> 
>   lkml.kernel.org/r/20140224162400.GE16457@...tnic

Ok, reread that thread and no definite conclusion was found I think.
Just Thinkpad firmware having overlapping resources.
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