linux-kernel - Re: [PATCH 3/4] Documentation/process: Add fallthrough pseudo-keyword

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Date:   Wed, 9 Oct 2019 14:51:46 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc:     Joe Perches <joe@...ches.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Pavel Machek <pavel@....cz>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Shawn Landden <shawn@....icu>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Miller <davem@...emloft.net>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Jonathan Corbet <corbet@....net>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 3/4] Documentation/process: Add fallthrough pseudo-keyword

On Sat, Oct 5, 2019 at 10:48 AM Miguel Ojeda
<miguel.ojeda.sandonis@...il.com> wrote:
>
> On Sat, Oct 5, 2019 at 6:47 PM Joe Perches <joe@...ches.com> wrote:
> >
> > +When the C17/C18  [[fallthrough]] syntax is more commonly supported by
>
> Note that C17/C18 does not have [[fallthrough]]. C++17 introduced it,
> as it is mentioned above. I would keep the
> __attribute__((fallthrough)) -> [[fallthrough]] change you did,
> though, since that is indeed the standard syntax (given the paragraph
> references C++17).
>
> I was told by Aaron Ballman (who is proposing them for C) that it is
> more or less likely that it becomes standardized in C2x. However, it
> is still not added to the draft (other attributes are already,
> though). See N2268 and N2269:
>
>     http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2268.pdf (fallthrough)
>     http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2269.pdf
> (attributes in general)
>

Interesting. I think those links might be useful to include, or drop
the section on C++ style attributes outright. Either way:
Acked-by: Nick Desaulniers <ndesaulniers@...gle.com>

-- 
Thanks,
~Nick Desaulniers