linux-kernel - Re: [tip:x86/urgent] x86-32: Make sure the stack is set up before we use it

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Message-ID: <4D4CD411.6070800@zytor.com>
Date:	Fri, 04 Feb 2011 20:37:37 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Kees Cook <kees.cook@...onical.com>
CC:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	castet.matthieu@...e.fr, tglx@...utronix.de, hpa@...ux.intel.com
Subject: Re: [tip:x86/urgent] x86-32: Make sure the stack is set up before
 we use it

On 02/04/2011 06:19 PM, Kees Cook wrote:
> Hi Peter,
> 
> This works for me doing CPU hotplugging on ia32, but on x86_64 it hangs.
> (Both boot, though.)
> 
> Thanks,
> 
> -Kees

I can't reproduce the failure here, and it's hard to see how this patch
would make a significant change on 64 bits.  Could you try reverting
*only* the head_64.S hunk and try it on your platform again?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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