linux-kernel - Re: [PATCH v5 2/3] implement ww_mutex abstraction for the Rust tree

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Message-ID: <20250805120813.1f8714f5@nimda.home>
Date: Tue, 5 Aug 2025 12:08:13 +0300
From: Onur Özkan <work@...rozkan.dev>
To: Daniel Almeida <daniel.almeida@...labora.com>
Cc: Benno Lossin <lossin@...nel.org>, Boqun Feng <boqun.feng@...il.com>,
 linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
 ojeda@...nel.org, alex.gaynor@...il.com, gary@...yguo.net,
 a.hindborg@...nel.org, aliceryhl@...gle.com, tmgross@...ch.edu,
 dakr@...nel.org, peterz@...radead.org, mingo@...hat.com, will@...nel.org,
 longman@...hat.com, felipe_life@...e.com, daniel@...lak.dev,
 bjorn3_gh@...tonmail.com, dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH v5 2/3] implement ww_mutex abstraction for the Rust tree

On Sat, 2 Aug 2025 11:15:07 -0300
Daniel Almeida <daniel.almeida@...labora.com> wrote:

> Btw, I can also try to implement a proof of concept, so long as
> people agree that this approach makes sense.

It's not necessary to provide a full P.o.C but a small demonstration of
the kind of ww_mutex API you would prefer would be helpful. Seeing a few
sample Rust use-cases (especially in comparison to existing C
implementations) would give a clearer picture for me.

At the moment, the implementation is just a wrapper ([1]) around the C
ww_mutex with no additional functionality, mostly because we don't have
a solid consensus on the API design yet (we had some ideas about Tuple
based approach, but seems like that isn't going to be useful for most
of the ww_mutex users).

[1]: https://github.com/onur-ozkan/linux/commits/673e01a9c309c

> By the way, dri-devel seems to not be on cc? Added them now.

Thanks!

--

Regards,
Onur