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

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Date:	Mon, 5 Nov 2012 12:07:36 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Corentin Chary <corentincj@...aif.net>,
	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>,
	"H. Peter Anvin" <hpa@...or.com>, stable@...r.kernel.org
Subject: Re: [PATCH] samsung-laptop: Disable if CONFIG_EFI=y

> There is the 'efi_enabled' variable, but it doesn't strictly mean
> "this_is_a_uefi_system()", it actually means "Do we have EFI runtime
> services?". The whole thing is a bit of a mess and I'm planning on
> cleaning it up this week.


As far as I can understand it we should be reserving those areas on a
UEFI booted machine and just marking them as busy so that they are not
available to any drivers to go peering into.

Alan

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