linux-kernel - Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text

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Date:	Tue, 24 Jul 2007 08:17:53 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
CC:	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	jbeulich@...ell.com, zach@...are.com, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected
 kernel text

Mathieu Desnoyers wrote:
> Hi Rusty,
>
> Good catch. I also still wonder why alternative (except alternative smp,
> which is ok) and paravirt patching functions are not marked __init. I really
> hope they are never used when NMI, MCE are enabled or when threads may
> have been preempted in the site being patched, or it could result in an
> illegal instruction.
>   

We need to patch modules at load time.  Presumably an NMI/MCE handler
will not depend on code in a being-loaded module.

    J
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