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Date: Wed, 1 Apr 2026 20:32:56 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Markus Probst <markus.probst@posteo.de>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>, Len Brown <lenb@kernel.org>,
	Miguel Ojeda <ojeda@kernel.org>, Boqun Feng <boqun@kernel.org>,
	Gary Guo <gary@garyguo.net>,
	=?iso-8859-1?Q?Bj=F6rn?= Roy Baron <bjorn3_gh@protonmail.com>,
	Benno Lossin <lossin@kernel.org>,
	Andreas Hindborg <a.hindborg@kernel.org>,
	Alice Ryhl <aliceryhl@google.com>, Trevor Gross <tmgross@umich.edu>,
	Danilo Krummrich <dakr@kernel.org>, linux-kernel@vger.kernel.org,
	linux-acpi@vger.kernel.org, rust-for-linux@vger.kernel.org,
	driver-core@lists.linux.dev
Subject: Re: [PATCH] rust: ACPI: fix missing match data for PRP0001
Message-ID: <2026040124-unbolted-timing-ce25@gregkh>
References: <20260401-rust_acpi_prp0001-v1-1-f6a4d2ef9244@posteo.de>
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In-Reply-To: <20260401-rust_acpi_prp0001-v1-1-f6a4d2ef9244@posteo.de>

On Wed, Apr 01, 2026 at 02:06:25PM +0000, Markus Probst wrote:
> Export `acpi_of_match_device` function and use it to match the of device
> table against ACPI PRP0001 in Rust.
> 
> This fixes id_info being None on ACPI PRP0001 devices.
> 
> Using `device_get_match_data` is not possible, because Rust stores an
> index in the of device id instead of a data pointer.

I'm confused, why are we open-coding this in the rust layer?  What do we
need to change in the C side to make both layers be able to call the
same function instead?

thanks,

greg k-h