linux-kernel - Re: [PATCH] Revert "x86, efi: Calling __pa() with an ioremap()ed address is invalid"

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Date:	Sun, 11 Dec 2011 19:01:45 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Keith Packard <keithp@...thp.com>, linux-kernel@...r.kernel.org,
	Matt Fleming <matt.fleming@...el.com>,
	Matthew Garrett <mjg@...hat.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Huang Ying <huang.ying.caritas@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] Revert "x86, efi: Calling __pa() with an ioremap()ed
 address is invalid"

On 12/11/2011 06:59 PM, Linus Torvalds wrote:
> On Sun, Dec 11, 2011 at 4:12 PM, Keith Packard <keithp@...thp.com> wrote:
>> This hangs my MacBook Air at boot time; I get no console messages at
>> all. I reverted this on top of -rc5 and my machine boots again.
> 
> Interesting. Current -git works for me on my 11" Macbook Air. Which
> should be identical to yours. This is the 4GB RAM, 128GB disk version,
> no?
> 
> But I'm running OpenSUSE, and you're running Debian, right? And our
> kernel configs are probably wildly different, since I tend to try to
> boot a fairly minimal set.
> 
> That said, if you've verified that if fails for you, I guess we should
> revert regardless. Matt, any suggestions for tests to do?
> 

Also... I'd like to know what machines, if any, would break without the
patch, so we can figure out what has to be tested.

	-hpa


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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