linux-kernel - Re: [PATCH v2 03/13] rust: lock: introduce `Mutex`

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Message-ID: <CANiq72nhWy5V=bE+39jFvV20+2v-xp+4iYmG=qTt+=GgF6Z3hA@mail.gmail.com>
Date:   Thu, 6 Apr 2023 18:45:36 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Wedson Almeida Filho <wedsonaf@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        rust-for-linux@...r.kernel.org, Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        linux-kernel@...r.kernel.org,
        Wedson Almeida Filho <walmeida@...rosoft.com>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>
Subject: Re: [PATCH v2 03/13] rust: lock: introduce `Mutex`

On Wed, Apr 5, 2023 at 10:49 PM Peter Zijlstra <peterz@...radead.org> wrote:
>
> Oh man, that's sad, I was hoping it would write the equivalent inline
> function in rust.

Some of us hope Rust would directly handle importing C headers, so
avoiding the intermediate step, like a few languages support.

> But yeah, feel free to convert macros to inline functions where the
> difference is moot. There is indeed no real reason for mutex_lock() to
> not be an inline function in that case.

We initially minimized changes on the C side on purpose, but if
maintainers are OK with that (modulo exceptions), it would be great.

Cheers,
Miguel