linux-kernel - Re: [RFC PATCH] rust: add cdev for rust bindings helper

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Message-ID: <2025030451-polka-lustfully-1edd@gregkh>
Date: Tue, 4 Mar 2025 06:42:17 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Sidong Yang <sidong.yang@...iosa.ai>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] rust: add cdev for rust bindings helper

On Tue, Mar 04, 2025 at 01:04:49PM +0900, Sidong Yang wrote:
> This patch adds cdev rust bindings.

Ok, but why?

And why not cc: the cdev maintainer?  :)

You'll need a much better changelog here, as well as a reason why you
need this and can't just use the miscdev binding instead.  Have you
tried that one out?

> Signed-off-by: Sidong Yang <sidong.yang@...iosa.ai>
> ---
>  rust/bindings/bindings_helper.h | 1 +
>  rust/helpers/cdev.c             | 3 +++
>  rust/helpers/helpers.c          | 1 +
>  3 files changed, 5 insertions(+)
>  create mode 100644 rust/helpers/cdev.c
> 
> diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
> index f46cf3bb7069..07145905bc10 100644
> --- a/rust/bindings/bindings_helper.h
> +++ b/rust/bindings/bindings_helper.h
> @@ -10,6 +10,7 @@
>  #include <linux/blk-mq.h>
>  #include <linux/blk_types.h>
>  #include <linux/blkdev.h>
> +#include <linux/cdev.h>
>  #include <linux/cred.h>
>  #include <linux/device/faux.h>
>  #include <linux/errname.h>
> diff --git a/rust/helpers/cdev.c b/rust/helpers/cdev.c
> new file mode 100644
> index 000000000000..929aa5359a47
> --- /dev/null
> +++ b/rust/helpers/cdev.c
> @@ -0,0 +1,3 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/cdev.h>
> diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
> index 0640b7e115be..6aa69761409e 100644
> --- a/rust/helpers/helpers.c
> +++ b/rust/helpers/helpers.c
> @@ -11,6 +11,7 @@
>  #include "bug.c"
>  #include "build_assert.c"
>  #include "build_bug.c"
> +#include "cdev.c"
>  #include "cred.c"
>  #include "device.c"
>  #include "err.c"
> -- 
> 2.34.1
> 

I think you're missing the actual bindings here, right?

confused,

greg k-h