linux-kernel - Re: [PATCH rust-next 1/2] rust: miscdevice: add llseek support

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Message-ID: <2025081836-unbraided-justness-4b43@gregkh>
Date: Mon, 18 Aug 2025 16:17:40 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Ryosuke Yasuoka <ryasuoka@...hat.com>
Cc: arnd@...db.de, ojeda@...nel.org, alex.gaynor@...il.com,
	boqun.feng@...il.com, gary@...yguo.net, bjorn3_gh@...tonmail.com,
	lossin@...nel.org, a.hindborg@...nel.org, aliceryhl@...gle.com,
	tmgross@...ch.edu, dakr@...nel.org, lee@...nel.org,
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH rust-next 1/2] rust: miscdevice: add llseek support

On Mon, Aug 18, 2025 at 10:58:38PM +0900, Ryosuke Yasuoka wrote:
> Add the ability to write a file_operations->llseek hook in Rust when
> using the miscdevice abstraction.
> 
> Signed-off-by: Ryosuke Yasuoka <ryasuoka@...hat.com>
> ---
>  rust/kernel/miscdevice.rs | 36 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)

What misc device driver needs any real llseek function?  The ones I see
in the tree are only using generic_llseek or noop_llseek.

Do you have a specific misc driver that you want to write in rust that
needs this call?

thanks,

greg k-h