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

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Date:   Fri, 24 Feb 2023 11:01:13 -0300
From:   Martin Rodriguez Reboredo <yakoyoku@...il.com>
To:     lina@...hilina.net
Cc:     alex.gaynor@...il.com, asahi@...ts.linux.dev,
        bjorn3_gh@...tonmail.com, boqun.feng@...il.com, gary@...yguo.net,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        masahiroy@...nel.org, nathan@...nel.org, ndesaulniers@...gle.com,
        nicolas@...sle.eu, ojeda@...nel.org,
        rust-for-linux@...r.kernel.org, wedsonaf@...il.com
Subject: Re: [PATCH] rust: Enable the new_uninit feature for kernel and driver crates

On Fri, Feb 24, 2023 at 05:09:47PM +0900, Asahi Lina wrote:
> 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.

Very useful to me as some constructors in the USB bindings that I'm
writting might make use of unitialized memory.

Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@...il.com>