linux-kernel - [PATCH v6 00/17] Add static

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Message-ID: <20200710133831.943894387@infradead.org>
Date:   Fri, 10 Jul 2020 15:38:31 +0200
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, pbonzini@...hat.com,
        mathieu.desnoyers@...icios.com, linux@...musvillemoes.dk
Subject: [PATCH v6 00/17] Add static_call

Hi all,

Hopefully for the last time...

static_call(), is the idea of static_branch() applied to indirect function
calls. Remove a data load (indirection) by modifying the text.

The inline implementation still relies on objtool to generate the
.static_call_sites section, mostly because this is a natural place for x86_64
and works for both GCC and LLVM.  Other architectures can pick other means
if/when they implement the inline patching. The out-of-line (aka. trampoline)
variant doesn't require this.

Patches go on top of: linus + tip/objtool/core

Patches can also be found here:

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/static_call

Changes since the last time:

 - rebased
 - fixed ftrace synthetic events (rostedt)