linux-kernel - Dynamic nop selection breaks boot on Geode LX

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Message-ID: <AANLkTimF2tcksBkww50MhiO0YY=MCt4rcnfDR+tJhTUJ@mail.gmail.com>
Date:	Sat, 2 Oct 2010 20:16:19 +0100
From:	Daniel Drake <dsd@...top.org>
To:	jbaron@...hat.com
Cc:	Andres Salomon <dilinger@...ued.net>, Chris Ball <cjb@...top.org>,
	linux-kernel@...r.kernel.org, rostedt@...dmis.org
Subject: Dynamic nop selection breaks boot on Geode LX

Hi,

linux-next fails to boot on OLPC's XO-1 laptop based on Geode LX processor.

This is because of

commit f49aa448561fe9215f43405cac6f31eb86317792
Author: Jason Baron <jbaron@...hat.com>
Date:   Fri Sep 17 11:08:51 2010 -0400

    jump label: Make dynamic no-op selection available outside of ftrace

http://git.kernel.org/?p=linux/kernel/git/mingo/linux-2.6-x86.git;a=commitdiff;h=f49aa44

The Geode hangs inside the asm() statement inside arch_init_ideal_nop5.

Any thoughts?

I'm a bit out of my depth debugging assembly code, but will happily
take pointers and patches to help diagnose.

cheers
Daniel
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