linux-kernel - Re: [PATCH v4 1/2] rust: kernel: add `drop

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Message-ID: <CAH5fLgg04kKJVzM0vnp8j-rYfYdCb-RZ47U_MEX9unXsDDYXqA@mail.gmail.com>
Date: Mon, 19 Aug 2024 13:33:39 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
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>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Andreas Hindborg <a.hindborg@...sung.com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] rust: kernel: add `drop_contents` to `BoxExt`

On Mon, Aug 19, 2024 at 1:24 PM Benno Lossin <benno.lossin@...ton.me> wrote:
>
> Sometimes (see [1]) it is necessary to drop the value inside of a
> `Box<T>`, but retain the allocation. For example to reuse the allocation
> in the future.
> Introduce a new function `drop_contents` that turns a `Box<T>` into
> `Box<MaybeUninit<T>>` by dropping the value.
>
> Signed-off-by: Benno Lossin <benno.lossin@...ton.me>
> Link: https://lore.kernel.org/rust-for-linux/20240418-b4-rbtree-v3-5-323e134390ce@google.com/ [1]

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>