linux-kernel - Re: [patch 05/14] percpu: Use a Kconfig variable to configure arch specific percpu setup

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Message-ID: <20071129011802.GK24223@one.firstfloor.org>
Date:	Thu, 29 Nov 2007 02:18:03 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <clameter@....com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...e.de>
Subject: Re: [patch 05/14] percpu: Use a Kconfig variable to configure arch specific percpu setup

On Wed, Nov 28, 2007 at 04:11:37PM -0800, Christoph Lameter wrote:
> 1. The stack canary

You would need to change gcc with a new option and only allow the stack
checking when the compiler supports the new option. However the problem
is still how to get a reasonable fixed offset. Or perhaps just change
gcc to use a linker symbol relative to %gs that could be set to anything?

-Andi
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