linux-kernel - Re: [PATCH v2 2/2] rust: miscdevice: add base miscdevice abstraction

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Message-ID: <CANiq72kOs6vPDUzZttQNqePFHphCQ30iVmZ5MO7eCJfPG==Vzg@mail.gmail.com>
Date: Mon, 21 Oct 2024 12:34:27 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Arnd Bergmann <arnd@...db.de>, 
	Miguel Ojeda <ojeda@...nel.org>, Alexander Viro <viro@...iv.linux.org.uk>, 
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, 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>, rust-for-linux@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] rust: miscdevice: add base miscdevice abstraction

Hi Alice, Greg,

On Tue, Oct 1, 2024 at 10:23 AM Alice Ryhl <aliceryhl@...gle.com> wrote:
>
> +            compat_ioctl: if T::HAS_COMPAT_IOCTL {
> +                Some(fops_compat_ioctl::<T>)
> +            } else if T::HAS_IOCTL {
> +                Some(bindings::compat_ptr_ioctl)
> +            } else {
> +                None
> +            },
> +            ..unsafe { MaybeUninit::zeroed().assume_init() }

With the lints series queued for the next cycle, Clippy spots the
missing `// SAFETY` comment here...

> +unsafe extern "C" fn fops_open<T: MiscDevice>(
> +    inode: *mut bindings::inode,
> +    file: *mut bindings::file,
> +) -> c_int {

...as well as the missing `# Safety` section for each of these.

It can be seen in e.g. today's -next.

I hope that helps!

Cheers,
Miguel