linux-kernel - Re: [PATCH 10/11] EFI: Runtime services virtual mapping

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Message-ID: <20131103123508.GB5313@dhcp-16-126.nay.redhat.com>
Date:	Sun, 3 Nov 2013 20:35:08 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Borislav Petkov <bp@...en8.de>,
	Linux EFI <linux-efi@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>, "H. Peter Anvin" <hpa@...or.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Vivek Goyal <vgoyal@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>
Subject: Re: [PATCH 10/11] EFI: Runtime services virtual mapping

On 11/01/13 at 12:50pm, Matt Fleming wrote:
> On Fri, 01 Nov, at 11:35:08AM, Dave Young wrote:
> > > The conflict is caused by missing one commit in matt's efi next tree:
> > > 
> > > commit 700870119f49084da004ab588ea2b799689efaf7
> > > Author: Josh Boyer <jwboyer@...hat.com>
> > > Date:   Thu Apr 18 07:51:34 2013 -0700
> > > 
> > >     x86, efi: Don't map Boot Services on i386
> > >     
> > >     Add patch to fix 32bit EFI service mapping (rhbz 726701)
> > >     
> > >     Multiple people are reporting hitting the following WARNING on i386,
> > >     
> > >       WARNING: at arch/x86/mm/ioremap.c:102 __ioremap_caller+0x3d3/0x440()
> > >       Modules linked in:
> > >       Pid: 0, comm: swapper Not tainted 3.9.0-rc7+ #95
> > 
> > Rethinking about above commit, it is actually a workaround for
> > mapping boot service, I suspect the problem connect to the off-by-one
> > problem in boot service reserve function. Matt, idea?
> 
> No, it's not the same problem. And just to make absolutely sure I
> reverted the above commit and applied your patch, but I still see the
> WARN_ON() described above.

Ok, I'm wrong then, thanks for verifying..
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