linux-kernel - Re: [PATCH 1/2] Compiler Attributes: add support for _

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Date:   Mon, 22 Oct 2018 13:07:34 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Dan <dan.carpenter@...cle.com>
Cc:     bernd@...rovitsch.priv.at, "Ted Ts'o" <tytso@....edu>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Olof Johansson <olof@...m.net>,
        Konstantin Ryabitsev <konstantin@...uxfoundation.org>,
        David Miller <davem@...emloft.net>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Kees Cook <keescook@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Paul Lawrence <paullawrence@...gle.com>,
        Sandipan Das <sandipan@...ux.vnet.ibm.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Will Deacon <will.deacon@....com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Paul Burton <paul.burton@...s.com>,
        David Rientjes <rientjes@...gle.com>, Willy Tarreau <w@....eu>,
        Martin Sebor <msebor@...il.com>,
        Christopher Li <sparse@...isli.org>,
        Jonathan Corbet <corbet@....net>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Joe Perches <joe@...ches.com>, Arnd Bergmann <arnd@...db.de>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Stefan Agner <stefan@...er.ch>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        linux-sparse@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 1/2] Compiler Attributes: add support for __fallthrough
 (gcc >= 7.1)

On Mon, Oct 22, 2018 at 12:54 PM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> Doing both is super ugly.  Let's just do comments until Eclipse gets
> updated.
>
> I had wanted to move to the attribute because that would simplify things
> in Smatch but it's not a huge deal to delay for another year.

I can re-send them later on, no problem. On the other hand, doing the
changes will push tools to get updated sooner ;-)

If tools were doing something as fancy as comment parsing for
diagnostics, they should have been updated with the attribute support
(either gcc's or C++17's) -- it has been more than a year now since
gcc 7.1 and the C++17 final draft. (Note that this does not apply for
things like clang, since they weren't doing comment parsing to begin
with.)

Cheers,
Miguel