linux-kernel - Re: [PATCH v16 14/17] rust: sync: Expose lock::Backend

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Message-Id: <DF4J6FNW3S1A.293HZK6TO45S9@kernel.org>
Date: Mon, 22 Dec 2025 07:27:51 +0100
From: "Benno Lossin" <lossin@...nel.org>
To: "Lyude Paul" <lyude@...hat.com>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, "Thomas Gleixner" <tglx@...utronix.de>
Cc: "Boqun Feng" <boqun.feng@...il.com>, "Daniel Almeida"
 <daniel.almeida@...labora.com>, "Miguel Ojeda" <ojeda@...nel.org>, "Alex
 Gaynor" <alex.gaynor@...il.com>, "Gary Guo" <gary@...yguo.net>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, "Andreas
 Hindborg" <a.hindborg@...nel.org>, "Alice Ryhl" <aliceryhl@...gle.com>,
 "Trevor Gross" <tmgross@...ch.edu>, "Danilo Krummrich" <dakr@...nel.org>,
 "Andrew Morton" <akpm@...ux-foundation.org>, "Peter Zijlstra"
 <peterz@...radead.org>, "Ingo Molnar" <mingo@...hat.com>, "Will Deacon"
 <will@...nel.org>, "Waiman Long" <longman@...hat.com>
Subject: Re: [PATCH v16 14/17] rust: sync: Expose lock::Backend

On Mon Dec 15, 2025 at 6:58 PM CET, Lyude Paul wrote:
> Due to the addition of sync::lock::Backend::Context, lock guards can be
> returned with a different Backend than their respective lock. Since we'll
> be adding a trait bound for Backend to GlobalGuard in order to support
> this, users will need to be able to directly refer to Backend so that they
> can use it in trait bounds.
>
> So, let's make this easier for users and expose Backend in sync.
>
> Signed-off-by: Lyude Paul <lyude@...hat.com>

Reviewed-by: Benno Lossin <lossin@...nel.org>

Cheers,
Benno

> ---
>  rust/kernel/sync.rs | 1 +
>  1 file changed, 1 insertion(+)