linux-kernel - Re: [PATCH v8 1/4] rust: types: Add Ownable/Owned types

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Message-ID: <87msdb79vz.fsf@kernel.org>
Date: Sun, 23 Mar 2025 21:46:40 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
To: "Oliver Mangold" <oliver.mangold@...me>
Cc: "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>,  "Benno
 Lossin" <benno.lossin@...ton.me>,  "Alice Ryhl" <aliceryhl@...gle.com>,
  "Trevor Gross" <tmgross@...ch.edu>,  "Asahi Lina" <lina@...hilina.net>,
  <rust-for-linux@...r.kernel.org>,  <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 1/4] rust: types: Add Ownable/Owned types

"Oliver Mangold" <oliver.mangold@...me> writes:

> From: Asahi Lina <lina@...hilina.net>
>
> By analogy to AlwaysRefCounted and ARef, an Ownable type is a (typically
> C FFI) type that *may* be owned by Rust, but need not be. Unlike
> AlwaysRefCounted, this mechanism expects the reference to be unique
> within Rust, and does not allow cloning.
>
> Conceptually, this is similar to a KBox<T>, except that it delegates
> resource management to the T instead of using a generic allocator.
>
> Link: https://lore.kernel.org/all/20250202-rust-page-v1-1-e3170d7fe55e@asahilina.net/
> Signed-off-by: Asahi Lina <lina@...hilina.net>
> [ om: make from_raw() and into_raw() public, small fixes to documentation ]
> Signed-off-by: Oliver Mangold <oliver.mangold@...me>

Please see review comments for the original posting of the patch from
Alice [1] and me [2].


Best regards,
Andreas Hindborg


[1] https://lore.kernel.org/all/CAH5fLggscATtCgQwCYSms77oSFOMkjTscRDqAOZsSgoHsOoPQw@mail.gmail.com
[2] https://lore.kernel.org/all/87h64qe3dt.fsf@kernel.org