linux-kernel - Re: [PATCH 0/3] Rewrite x86/ftrace to use text

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Message-ID: <20190826130410.GU2369@hirez.programming.kicks-ass.net>
Date:   Mon, 26 Aug 2019 15:04:10 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     Nadav Amit <nadav.amit@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [PATCH 0/3] Rewrite x86/ftrace to use text_poke()

On Mon, Aug 26, 2019 at 02:51:38PM +0200, Peter Zijlstra wrote:
> Ftrace was one of the last W^X violators; these patches move it over to the
> generic text_poke() interface and thereby get rid of this oddity.
> 
> Very lightly tested...

I'm thinking there's more cleanup to be had; set_kernel_text_*() can go
away now, and I'm thinking the whole batching thing can be further
simplified/shared between this and jump_label.