linux-kernel - Re: [PATCH] rust: types: make `Opaque` be `!Unpin`

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Message-ID: <CANiq72kUFSc-iX7r0EQMXAh36Bc-4rWPdLnYO0CYbSCRyzpvXQ@mail.gmail.com>
Date:   Thu, 10 Aug 2023 01:21:49 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Benno Lossin <benno.lossin@...ton.me>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Alice Ryhl <aliceryhl@...gle.com>,
        Andreas Hindborg <nmi@...aspace.dk>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev
Subject: Re: [PATCH] rust: types: make `Opaque` be `!Unpin`

On Fri, Jun 30, 2023 at 5:03 PM Benno Lossin <benno.lossin@...ton.me> wrote:
>
> Adds a `PhantomPinned` field to `Opaque<T>`. This removes the last Rust
> guarantee: the assumption that the type `T` can be freely moved. This is
> not the case for many types from the C side (e.g. if they contain a
> `struct list_head`). This change removes the need to add a
> `PhantomPinned` field manually to Rust structs that contain C structs
> which must not be moved.
>
> Signed-off-by: Benno Lossin <benno.lossin@...ton.me>

Applied to `rust-next` -- thanks everyone!

Cheers,
Miguel