linux-kernel - Re: [PATCH v3 2/9] rust: sync: add `Arc::{from_raw, into

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Message-ID: <87r0nvs3hu.fsf@metaspace.dk>
Date:   Tue, 22 Aug 2023 13:46:56 +0200
From:   "Andreas Hindborg (Samsung)" <nmi@...aspace.dk>
To:     Alice Ryhl <aliceryhl@...gle.com>
Cc:     rust-for-linux@...r.kernel.org, Tejun Heo <tj@...nel.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        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>, Benno Lossin <benno.lossin@...ton.me>,
        linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Wedson Almeida Filho <walmeida@...rosoft.com>
Subject: Re: [PATCH v3 2/9] rust: sync: add `Arc::{from_raw, into_raw}`


Alice Ryhl <aliceryhl@...gle.com> writes:

> From: Wedson Almeida Filho <walmeida@...rosoft.com>
>
> These methods can be used to turn an `Arc` into a raw pointer and back,
> in a way that preserves the metadata for fat pointers.
>
> This is done using the unstable ptr_metadata feature [1]. However, it
> could also be done using the unstable pointer_byte_offsets feature [2],
> which is likely to have a shorter path to stabilization than
> ptr_metadata.
>
> Link: https://github.com/rust-lang/rust/issues/81513 [1]
> Link: https://github.com/rust-lang/rust/issues/96283 [2]
> Signed-off-by: Wedson Almeida Filho <walmeida@...rosoft.com>
> Co-developed-by: Alice Ryhl <aliceryhl@...gle.com>
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
> Reviewed-by: Gary Guo <gary@...yguo.net>
> ---

Reviewed-by: Andreas Hindborg <a.hindborg@...sung.com>