From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753771AbYG2E1W (ORCPT ); Tue, 29 Jul 2008 00:27:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751188AbYG2E1N (ORCPT ); Tue, 29 Jul 2008 00:27:13 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:49498 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751126AbYG2E1M (ORCPT ); Tue, 29 Jul 2008 00:27:12 -0400 Date: Mon, 28 Jul 2008 21:26:55 -0700 From: Greg KH To: Jesse Barnes Cc: Ingo Molnar , linux-kernel@vger.kernel.org, the arch/x86 maintainers , Arjan van de Ven , Yinghai Lu Subject: Re: [bug] PCI hotplug, ibmphp_access_ebda: WARNING: at arch/x86/mm/ioremap.c:182 __ioremap_caller+0x2d1/0x340() Message-ID: <20080729042655.GC13455@kroah.com> References: <20080726131512.GA29472@elte.hu> <200807281531.32640.jbarnes@virtuousgeek.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200807281531.32640.jbarnes@virtuousgeek.org> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 28, 2008 at 03:31:32PM -0700, Jesse Barnes wrote: > 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? Yeah, that's a real low-level driver, so it probably has to do this kind of thing. I no longer have access to hardware that uses this driver, try poking Gary (the 2.4 pci hotplug maintainer), he probably knows more about it now. thanks, greg k-h