linux-kernel - Re: [patch 1/3] Text Edit Lock

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Message-ID: <46770CA9.4070304@redhat.com>
Date:	Mon, 18 Jun 2007 18:52:25 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	prasanna@...ibm.com, ananth@...ibm.com, jkenisto@...ibm.com,
	ak@...e.de
Subject: Re: [patch 1/3] Text Edit Lock - i386

On 06/18/2007 05:58 PM, Mathieu Desnoyers wrote:
> Interface to use for code patching : uses a mutex to insure mutual edit
> exclusion and makes sure the page is writable.
> 
... 
> +/* Mutex protecting text section modification (dynamic code patching) */
> +static DEFINE_MUTEX(text_mutex);
> +

Probably should be a spinlock.

And it just occurred to me, how does smp_alternatives deal with this?
Is it broken now when the text section is read-only?
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