linux-kernel - Re: [PATCH] rust: retain pointer mut-ness in `container

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Message-ID: <CAJ-ks9mVs6+S6pgz9JEUWTjLNKuRzm45fWP4b+2kbUEeDY4pYQ@mail.gmail.com>
Date: Wed, 9 Apr 2025 10:48:43 -0400
From: Tamir Duberstein <tamird@...il.com>
To: Miguel Ojeda <ojeda@...nel.org>, 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>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rust: retain pointer mut-ness in `container_of!`

On Wed, Apr 9, 2025 at 10:43 AM Tamir Duberstein <tamird@...il.com> wrote:
>
> Avoid casting the input pointer to `*const _`, allowing the output
> pointer to be `*mut` if the input is `*mut`. This allows a number of
> `*const` to `*mut` conversions to be removed at the cost of slightly
> worse ergonomics when the macro is used with a reference rather than a
> pointer; the only example of this was in the macro's own doctest.
>
> Reviewed-by: Benno Lossin <benno.lossin@...ton.me>
> Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
> Signed-off-by: Tamir Duberstein <tamird@...il.com>
> ---
> This patch is extracted from 3 other series to reduce duplication.

Oops, forgot to include

Reviewed-by: Andreas Hindborg <a.hindborg@...nel.org>

from https://lore.kernel.org/all/87semhbncg.fsf@kernel.org/. I hope
this is proper form!