linux-kernel - Re: [PATCH] rust: Enable the new_uninit feature for kernel and driver crates

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Message-Id: <CQV7ZNT6LMXI.1XG4YXSH8I7JK@vincent-arch>
Date:   Wed, 01 Mar 2023 18:24:26 +0100
From:   "Vincenzo Palazzo" <vincenzopalazzodev@...il.com>
To:     "Asahi Lina" <lina@...hilina.net>,
        "Miguel Ojeda" <ojeda@...nel.org>,
        "Alex Gaynor" <alex.gaynor@...il.com>,
        "Wedson Almeida Filho" <wedsonaf@...il.com>,
        "Boqun Feng" <boqun.feng@...il.com>, "Gary Guo" <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        "Masahiro Yamada" <masahiroy@...nel.org>,
        "Nathan Chancellor" <nathan@...nel.org>,
        "Nick Desaulniers" <ndesaulniers@...gle.com>,
        "Nicolas Schier" <nicolas@...sle.eu>
Cc:     <rust-for-linux@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-kbuild@...r.kernel.org>, <asahi@...ts.linux.dev>
Subject: Re: [PATCH] rust: Enable the new_uninit feature for kernel and
 driver crates

> The unstable new_uninit feature enables various library APIs to create
> uninitialized containers, such as `Box::assume_init()`. This is
> necessary to build abstractions that directly initialize memory at the
> target location, instead of doing copies through the stack.
>
> Will be used by the DRM scheduler abstraction in the kernel crate, and
> by field-wise initialization (e.g. using `place!()` or a future
> replacement macro which may itself live in `kernel`) in driver crates.
>
> See [1] [2] [3] for background information.
>
> [1] https://github.com/Rust-for-Linux/linux/issues/879
> [2] https://github.com/Rust-for-Linux/linux/issues/2
> [3] https://github.com/rust-lang/rust/issues/63291
>
> Signed-off-by: Asahi Lina <lina@...hilina.net>
> ---

Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@...il.com>