linux-kernel - Re: [PATCH] x86 Fix test

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Message-ID: <20080311090947.GG25110@elte.hu>
Date:	Tue, 11 Mar 2008 10:09:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH] x86 Fix test_poke for vmalloced pages


* Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> wrote:

> The shadow vmap for DEBUG_RODATA kernel text modification uses 
> virt_to_page to get the pages from the pointer address.
> 
> However, I think vmalloc_to_page would be required in case the page is 
> used for modules.
> 
> Since only the core kernel text is marked read-only, use 
> kernel_text_address() to make sure we only shadow map the core kernel 
> text, not modules.

actually, i think we should mark module text readonly too.

	Ingo
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