linux-kernel - Re: [PATCH v2 1/3] rust: sync: change `<Arc<T> as ForeignOwnable>::PointedTo` to `T`

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Message-ID: <CAJ-ks9mDNptodHEPPd+TPZGT1Cs9EtyUKa9+ciAK9c4pge9M2A@mail.gmail.com>
Date: Sun, 16 Feb 2025 21:03:58 -0500
From: Tamir Duberstein <tamird@...il.com>
To: Andreas Hindborg <a.hindborg@...nel.org>
Cc: Danilo Krummrich <dakr@...nel.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>, 
	Benno Lossin <benno.lossin@...ton.me>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, Joel Becker <jlbec@...lplan.org>, Christoph Hellwig <hch@....de>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, 
	Waiman Long <longman@...hat.com>, Fiona Behrens <me@...enk.dev>, 
	Charalampos Mitrodimas <charmitro@...teo.net>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] rust: sync: change `<Arc<T> as ForeignOwnable>::PointedTo`
 to `T`

On Fri, Feb 7, 2025 at 9:50 AM Andreas Hindborg <a.hindborg@...nel.org> wrote:
>
> Using `ArcInner` as `PoinedTo` in the `ForeignOwnable` implementation for
> `Arc` is a bit unfortunate. Using `T` as `PointedTo` does not remove any
> functionality, but allows `ArcInner` to be private. Further, it allows
> downstream users to write code that is generic over `Box` and `Arc`, when
> downstream users need access to `T` after calling `into_foreign`.

I stumbled upon https://github.com/Rust-for-Linux/linux/pull/1036 the
other day. Boqun, are there any plans to revive this work? It might
obviate the need for _this_ patch.

Tamir