linux-kernel - Re: [bug] PCI hotplug, ibmphp_access_ebda: WARNING: at arch/x86/mm/ioremap.c:182 __ioremap

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Date:	Mon, 28 Jul 2008 15:31:32 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	the arch/x86 maintainers <x86@...nel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Yinghai Lu <yhlu.kernel@...il.com>, greg@...ah.com
Subject: Re: [bug] PCI hotplug, ibmphp_access_ebda: WARNING: at arch/x86/mm/ioremap.c:182 __ioremap_caller+0x2d1/0x340()

On Saturday, July 26, 2008 6:15 am Ingo Molnar wrote:
> FYI, -tip testing triggered the new warning below on a testbox. I
> suspect it's related to recent commits in drivers/pci/hotplug/.
> I'm wondering, why does a driver map the EBDA? That's a really lowlevel
> thing.

AFAICT, this driver digs around in there for hotplug controller configuration 
(cc'ing Greg since he appears to be one of the original authors).  It's a 
custom platform driver too, that may be the only method available there.  Is 
there a shadow copy of the EDBA somewhere we should be using instead?

Jesse
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