linux-kernel - Re: [RFC PATCH] compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use

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Message-ID: <F2529DE6-B500-44DC-AE72-45A304AD719B@zytor.com>
Date:   Wed, 31 Jul 2019 23:10:36 -0700
From:   hpa@...or.com
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Joe Perches <joe@...ches.com>, Pavel Machek <pavel@....cz>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "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>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] compiler_attributes.h: Add 'fallthrough' pseudo keyword for switch/case use

On July 31, 2019 4:55:47 PM PDT, Miguel Ojeda <miguel.ojeda.sandonis@...il.com> wrote:
>On Wed, Jul 31, 2019 at 11:01 PM <hpa@...or.com> wrote:
>>
>> The standard is moving toward adding this as an attribute with the
>[[fallthrough]] syntax; it is in C++17, not sure when it will be in C
>be if it isn't already.
>
>Not yet, but it seems to be coming:
>
>  http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2268.pdf
>
>However, even if C2x gets it, it will be quite a while until the GCC
>minimum version gets bumped up to that, so...
>
>Cheers,
>Miguel

The point was that we should plan ahead in whatever we end up doing.
-- 
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