linux-kernel - Re: [PATCH 28/33] x86_64: Remove the identity mapping as early as possible.

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Message-ID: <p734pww1d57.fsf@verdi.suse.de>
Date:	01 Aug 2006 21:15:00 +0200
From:	Andi Kleen <ak@...e.de>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Horms <horms@...ge.net.au>,
	Jan Kratochvil <lace@...kratochvil.net>,
	"H. Peter Anvin" <hpa@...or.com>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 28/33] x86_64: Remove the identity mapping as early as possible.

"Eric W. Biederman" <ebiederm@...ssion.com> writes:

> With the rewrite of the SMP trampoline and the early page
> allocator there is nothing that needs identity mapped pages,
> once we start executing C code.

Cool.

Hopefully that can be done for i386 too. People on other architectures
have been complaining that i386 doesn't catch early NULL pointers.

-Andi
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