linux-kernel - Re: [PATCH] binder: use enum for binder ioctls

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Date:   Fri, 8 Dec 2023 15:35:09 +0000
From:   Carlos Llamas <cmllamas@...gle.com>
To:     Alice Ryhl <aliceryhl@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <christian@...uner.io>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Li Li <dualli@...gle.com>, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH] binder: use enum for binder ioctls

On Fri, Dec 08, 2023 at 03:28:01PM +0000, Alice Ryhl wrote:
> All of the other constants in this file are defined using enums, so make
> the constants more consistent by defining the ioctls in an enum as well.
> 
> This is necessary for Rust Binder since the _IO macros are too
> complicated for bindgen to see that they expand to integer constants.
> Replacing the #defines with an enum forces bindgen to evaluate them
> properly, which allows us to access them from Rust.
> 
> I originally intended to include this change in the first patch of the
> Rust Binder patchset [1], but at plumbers Carlos Llamas told me that
> this change has been discussed previously [2] and suggested that I send
> it upstream separately.
> 
> Link: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-1-08ba9197f637@google.com/ [1]
> Link: https://lore.kernel.org/all/YoIK2l6xbQMPGZHy@kroah.com/ [2]
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
> ---

Acked-by: Carlos Llamas <cmllamas@...gle.com>

Thanks,
--
Carlos Llamas