linux-kernel - Re: [PATCH] perf/x86/intel: Mark expected switch fall-throughs

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Message-ID: <CAKwvOdm=cOOW1MLz2re9MvW0K4g8cENdymOQoUL1k-+5v=bg=A@mail.gmail.com>
Date:   Wed, 26 Jun 2019 15:23:24 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Nathan Chancellor <natechancellor@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Joe Perches <joe@...ches.com>, Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Shawn Landden <shawn@....icu>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH] perf/x86/intel: Mark expected switch fall-throughs

On Wed, Jun 26, 2019 at 2:55 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Wed, Jun 26, 2019 at 11:24:32AM +0200, Peter Zijlstra wrote:
> > That's pretty atrocious code-gen :/
>
> And I know nobody reads comments (I don't either), but I did write one
> on this as it happens.

I've definitely read that block in include/linux/jump_label.h; can't
say I fully understand it yet, but appreciate patience and
explanations.
-- 
Thanks,
~Nick Desaulniers