linux-kernel - Re: [PATCH] rust: miscdevice: fix warning on c

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Message-ID: <2024101545-reentry-extenuate-58ce@gregkh>
Date: Tue, 15 Oct 2024 19:08:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Arnd Bergmann <arnd@...db.de>, 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>,
	Trevor Gross <tmgross@...ch.edu>, rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rust: miscdevice: fix warning on c_uint to u32 cast

On Tue, Oct 15, 2024 at 02:13:22PM +0000, Alice Ryhl wrote:
> When building miscdevice with clippy warnings, the following warning is
> emitted:
> 
> 	warning: casting to the same type is unnecessary (`u32` -> `u32`)
> 	   --> /home/aliceryhl/rust-for-linux/rust/kernel/miscdevice.rs:220:28
> 	    |
> 	220 |     match T::ioctl(device, cmd as u32, arg as usize) {
> 	    |                            ^^^^^^^^^^ help: try: `cmd`
> 	    |
> 	    = help: for further information visit
> 	      https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
> 	    = note: `-W clippy::unnecessary-cast` implied by `-W clippy::all`
> 	    = help: to override `-W clippy::all` add `#[allow(clippy::unnecessary_cast)]`
> 
> Thus, fix it.
> 
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
> ---
> This fixes a warning on my patches in char-misc-next. Greg, can you take
> this through that tree?

Will do, thanks!

greg k-h