linux-kernel - Re: [PATCH v7] rust: kernel: add support for bits/genmask macros

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Message-ID: <CAH5fLgicRxTsjpBKXDrcJSibOq7HQOsTXdKEBnH1-K8Jt=S-xA@mail.gmail.com>
Date: Wed, 2 Jul 2025 12:27:07 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Daniel Almeida <daniel.almeida@...labora.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>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Alexandre Courbot <acourbot@...dia.com>, Benno Lossin <lossin@...nel.org>, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v7] rust: kernel: add support for bits/genmask macros

On Mon, Jun 23, 2025 at 10:18 PM Daniel Almeida
<daniel.almeida@...labora.com> wrote:
>
> In light of bindgen being unable to generate bindings for macros, and
> owing to the widespread use of these macros in drivers, manually define
> the bit and genmask C macros in Rust.
>
> The *_checked version of the functions provide runtime checking while
> the const version performs compile-time assertions on the arguments via
> the build_assert!() macro.
>
> Signed-off-by: Daniel Almeida <daniel.almeida@...labora.com>

Is it intentional that the macros are not available for usize?

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