linux-kernel - Re: [PATCH v3 5/6] x86/ftrace: Use text

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Date:   Tue, 8 Oct 2019 10:43:35 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, mhiramat@...nel.org,
        bristot@...hat.com, jbaron@...mai.com,
        torvalds@...ux-foundation.org, tglx@...utronix.de,
        mingo@...nel.org, namit@...are.com, hpa@...or.com, luto@...nel.org,
        ard.biesheuvel@...aro.org, jpoimboe@...hat.com
Subject: Re: [PATCH v3 5/6] x86/ftrace: Use text_poke()

On Mon, 07 Oct 2019 10:17:21 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> Move ftrace over to using the generic x86 text_poke functions; this
> avoids having a second/different copy of that code around.
> 
> This also avoids ftrace violating the (new) W^X rule and avoids
> fragmenting the kernel text page-tables, due to no longer having to
> toggle them RW.
> 
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Daniel Bristot de Oliveira <bristot@...hat.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---


BTW, I'd really like to take this patch series through my tree. That
way I can really hammer it, as well as I have code that will be built
on top of it.

I'll review the other series in this thread, but I'm assuming they
don't rely on this series? Or do they?

-- Steve