linux-kernel - Re: [PATCH 1/2] rust: retain pointer mut-ness in `container

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Message-ID: <Z9f-3Aj3_FWBZRrm@google.com>
Date: Mon, 17 Mar 2025 10:52:12 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Tamir Duberstein <tamird@...il.com>
Cc: 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>, Trevor Gross <tmgross@...ch.edu>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 1/2] rust: retain pointer mut-ness in `container_of!`

On Fri, Mar 07, 2025 at 04:58:48PM -0500, Tamir Duberstein 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.
> 
> Signed-off-by: Tamir Duberstein <tamird@...il.com>

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