linux-kernel - Re: [PATCH v2 2/2] rust: init: add `write_[pin

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Message-ID: <20240801133055.6d127fd1@eugeo>
Date: Thu, 1 Aug 2024 13:30:55 +0100
From: Gary Guo <gary@...yguo.net>
To: Benno Lossin <benno.lossin@...ton.me>
Cc: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>,
 Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng
 <boqun.feng@...il.com>, Björn Roy Baron
 <bjorn3_gh@...tonmail.com>, Andreas Hindborg <a.hindborg@...sung.com>,
 Alice Ryhl <aliceryhl@...gle.com>, rust-for-linux@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] rust: init: add `write_[pin_]init` functions

On Mon, 08 Jul 2024 20:53:46 +0000
Benno Lossin <benno.lossin@...ton.me> wrote:

> Sometimes it is necessary to split allocation and initialization into
> two steps. One such situation is when reusing existing allocations
> obtained via `Box::drop_contents`. See [1] for an example.
> In order to support this use case add `write_[pin_]init` functions to the
> pin-init API. These functions operate on already allocated smart
> pointers that wrap `MaybeUninit<T>`.
> 
> Signed-off-by: Benno Lossin <benno.lossin@...ton.me>

Reviewed-by: Gary Guo <gary@...yguo.net>

> Link: https://lore.kernel.org/rust-for-linux/f026532f-8594-4f18-9aa5-57ad3f5bc592@proton.me/ [1]
> ---
>  rust/kernel/init.rs    | 84 ++++++++++++++++++++++++++++++------------
>  rust/kernel/prelude.rs |  2 +-
>  2 files changed, 61 insertions(+), 25 deletions(-)