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Date: Sat, 04 Apr 2026 23:32:44 +0200
Message-Id: <DHKOXDNO7MBC.PZK5N30ELOCG@kernel.org>
Subject: Re: [PATCH] rust: ACPI: fix missing match data for PRP0001
Cc: "Markus Probst" <markus.probst@posteo.de>, "Greg Kroah-Hartman"
 <gregkh@linuxfoundation.org>, "Rafael J. Wysocki" <rafael@kernel.org>, "Len
 Brown" <lenb@kernel.org>, "Miguel Ojeda" <ojeda@kernel.org>, "Boqun Feng"
 <boqun@kernel.org>, =?utf-8?q?Bj=C3=B6rn_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>, <linux-kernel@vger.kernel.org>,
 <linux-acpi@vger.kernel.org>, <rust-for-linux@vger.kernel.org>,
 <driver-core@lists.linux.dev>
To: "Gary Guo" <gary@garyguo.net>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260401-rust_acpi_prp0001-v1-1-f6a4d2ef9244@posteo.de>
 <2026040124-unbolted-timing-ce25@gregkh>
 <565d58a4b766bd4a63a45da81849ea178dce5f63.camel@posteo.de>
 <DHI5Y6PNVJSJ.SCAJL0A4W2TR@kernel.org>
 <DHKOQBER5U5N.IHLHH5ORAZCQ@garyguo.net>
In-Reply-To: <DHKOQBER5U5N.IHLHH5ORAZCQ@garyguo.net>

On Sat Apr 4, 2026 at 11:23 PM CEST, Gary Guo wrote:
> BTW, if most drivers use driver_data of ID as pointers, why is it defined=
 as
> kernel_ulong_t instead of just `void*`?

I think that's because the ID tables are exported to userspace via
scripts/mod/file2alias.c. If it would be void *, then there could be a mism=
atch
in size when cross compiling.