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

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Message-ID: <Pine.LNX.4.64.0711281727180.19859@schroedinger.engr.sgi.com>
Date:	Wed, 28 Nov 2007 17:27:37 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Andi Kleen <andi@...stfloor.org>
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 Thu, 29 Nov 2007, Andi Kleen wrote:

> 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?

I still think we should leave the canary as is.
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