linux-kernel - Re: [PATCH V6 03/15] cpufreq: Rust implementation doesn't parse BIT() macro

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Message-ID: <20250108065347.k67aqosuefcjdiqi@vireshk-i7>
Date: Wed, 8 Jan 2025 12:23:47 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Daniel Almeida <daniel.almeida@...labora.com>
Cc: Greg KH <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
	Danilo Krummrich <dakr@...hat.com>, 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>,
	linux-pm@...r.kernel.org,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
	rust-for-linux@...r.kernel.org,
	Manos Pitsidianakis <manos.pitsidianakis@...aro.org>,
	Erik Schilling <erik.schilling@...aro.org>,
	Alex Bennée <alex.bennee@...aro.org>,
	Joakim Bech <joakim.bech@...aro.org>, Rob Herring <robh@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 03/15] cpufreq: Rust implementation doesn't parse
 BIT() macro

On 07-01-25, 10:29, Daniel Almeida wrote:
> Viresh, FYI, there’s already a patch for this floating around [0].
> 
> I can send a new version today. From Alice’s last comments, it only
> needs a minor fix anyways.

Thanks for the pointer Daniel. I was expecting that I would be able to use the
definition from bindings generated with bindgen somehow.

The C header contains:

#define BIT(nr)			(1 << (nr))
#define CPUFREQ_NEED_UPDATE_LIMITS		BIT(0)

Bindgen doesn't get me a definition to CPUFREQ_NEED_UPDATE_LIMITS now. Is there
a way to make that work with nested macros ? I wanted to avoid defining them
again in the Rust side.

-- 
viresh