linux-kernel - [PATCH -v5 00/17] Rewrite x86/ftrace to use text

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Date:   Mon, 11 Nov 2019 14:12:52 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org
Cc:     peterz@...radead.org, linux-kernel@...r.kernel.org,
        rostedt@...dmis.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, jeyu@...nel.org, alexei.starovoitov@...il.com
Subject: [PATCH -v5 00/17] Rewrite x86/ftrace to use text_poke (and more)

Ftrace is one of the last W^X violators (after this only KLP is left). These
patches move it over to the generic text_poke() interface and thereby get rid
of this oddity.

The first 14 patches are the same as in the -v4 posting. The last 3 patches are
new.

Will, patch 13, arm/ftrace, is unchanged. This is because this way it preserves
behaviour, but if you can provide me a tested-by for the simpler variant I can
drop that in.

Patch 15 reworks ftrace's event_create_dir(), which ran module code before the
module was finished loading (before we even applied jump_labels and all that).

Patch 16 and 17 address minor review feedback.

Ingo, Alexei wants patch #1 for some BPF stuff, can he get that in a topic branch?