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Date: Fri, 9 Apr 2010 23:42:45 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: guenter.roeck@ericsson.com, linux-kernel@vger.kernel.org,
       Yinghai <yinghai.lu@oracle.com>,
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       "x86@kernel.org" <x86@kernel.org>, Andy Isaacson <adi@hexapodia.org>,
       Thomas Renninger <trenn@suse.de>
Subject: Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as
 x86_32
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> "Don't use legacy fixed-function addresses for nonstandard purposes."
> 
> There, there is your documentation.

It's probably a good idea to only reserve it if the space is actually
being used. There are a variety of legitimate reasons to use that space
for other things on embedded x86 boards.

They are only "legacy fixed function" if you have a PCI bus...