linux-kernel - Re: [PATCH] samsung-laptop: Disable if CONFIG

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Date:	Mon, 5 Nov 2012 09:12:01 +0000
From:	Corentin Chary <corentincj@...aif.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	Matthew Garrett <mjg@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-efi@...r.kernel.org,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	Alessandro Crismani <alessandro.crismani@...il.com>,
	Mikhail Bakhterev <mike.bakhterev@...il.com>,
	Patrick H <kernel@...storm.net>,
	Matt Fleming <matt.fleming@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, stable@...r.kernel.org
Subject: Re: [PATCH] samsung-laptop: Disable if CONFIG_EFI=y

On Sun, Nov 4, 2012 at 7:37 PM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> Acked-by: Corentin Chary <corentin.chary@...il.com>
>
> This is totally bogus and prevents users build a kernel which can work in
> either mode. As such its a regression.

Arg.. Sorry for that, I didn't realized that CONFIG_EFI=y was not
something rare these days.

> Do the detection check at runtime. If it was booted via EFI then don't
> grovel in places you shouldn't. Indeed its possible EFI should reserve
> those memory regions ?

I wonder how the windows driver works in this case.. Maybe they use
something completly different, and the SABI interface is still there
because nobody removed/disabled it ? In this case it's probably not a
good idea to use it on these machines since the implementation is
likely to be completly broken.

--
Corentin Chary
http://xf.iksaif.net
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