linux-kernel - Re: [PATCH 0/3] rust: miscdevice: Add additional data to MiscDeviceRegistration

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Message-ID: <2025012034-rope-canned-43da@gregkh>
Date: Mon, 20 Jan 2025 06:46:59 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Christian Schrefl <chrisi.schrefl@...il.com>
Cc: 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>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	Arnd Bergmann <arnd@...db.de>, Lee Jones <lee@...nel.org>,
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] rust: miscdevice: Add additional data to
 MiscDeviceRegistration

On Sun, Jan 19, 2025 at 11:11:12PM +0100, Christian Schrefl wrote:
> This set is based on Greg's driver-core-next tree.
> 
> Currently there is no good way to pass arbitrary data from the driver to
> a miscdevice or to share data between individual handles to a miscdevice in rust.

Why would you want to do this?  A misc device instance should be "self
contained" with the needed stuff to make it work.

Do you have an example of where this is needed as I can't figure out the
goal here, sorry.

thanks,

greg k-h