Date: Mon, 22 Oct 2018 13:07:02 +0100
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Michal Marek <michal.lkml@markovi.net>,
        Steven Rostedt <rostedt@goodmis.org>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Olof Johansson <olof@lxom.net>,
        Konstantin Ryabitsev <konstantin@linuxfoundation.org>,
        "David S . Miller" <davem@davemloft.net>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Kees Cook <keescook@chromium.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@kernel.org>,
        Paul Lawrence <paullawrence@google.com>,
        Sandipan Das <sandipan@linux.vnet.ibm.com>,
        Andrey Konovalov <andreyknvl@google.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Will Deacon <will.deacon@arm.com>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Paul Burton <paul.burton@mips.com>,
        David Rientjes <rientjes@google.com>, Willy Tarreau <w@1wt.eu>,
        Martin Sebor <msebor@gmail.com>,
        Christopher Li <sparse@chrisli.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Theodore Ts'o <tytso@mit.edu>,
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        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org,
        linux-sparse@vger.kernel.org, linux-kbuild@vger.kernel.org
Subject: Re: [PATCH 1/2] Compiler Attributes: add support for __fallthrough
 (gcc >= 7.1)
Message-ID: <20181022120658.jm7dv7jiq7riuqci@ltop.local>
References: <20181021171414.22674-1-miguel.ojeda.sandonis@gmail.com>
 <20181021171414.22674-2-miguel.ojeda.sandonis@gmail.com>
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Sender: linux-ext4-owner@vger.kernel.org

On Sun, Oct 21, 2018 at 07:14:13PM +0200, Miguel Ojeda wrote:
> 
> While comment parsing is a good idea to deal with old codebases
> that used such a comment as documentation for humans, the best
> solution is to use the attribute:
> 
>   * It is a "real" part of the AST (=> better for tooling).

This will create a problem for the recent versions of sparse which
support __has_attribute() because sparse falsely pretends to support
this attribute while, to play nice with -Wdeclaration-after-statement,
it needs some adaptation to the parsing (it's actually seen not as a 
statement but as a declaration).  I'll see to fix it this evening.


Regards,
-- Luc