linux-kernel - Re: [PATCH v10 25/27] x86: enable initial Rust support

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Message-ID: <C0631F27-43CE-4F2F-9075-25988CBD97F0@zytor.com>
Date:   Sat, 14 Oct 2023 13:50:09 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     comex <comexk@...il.com>
CC:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ramon de C Valle <rcvalle@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, patches@...ts.linux.dev,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...gle.com>,
        David Gow <davidgow@...gle.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v10 25/27] x86: enable initial Rust support

On October 14, 2023 1:25:12 PM PDT, comex <comexk@...il.com> wrote:
>
>
>> On Oct 13, 2023, at 12:00 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> 
>> Transparent unions have been standard C since C99.
>
>I don’t think that’s right.  Certainly __attribute__((transparent_union)) is not standard C; are you referring to a different feature?
>

My mistake... I was thinking about anonymous unions.