linux-kernel - [PATCH 0/7] misc device: support device drivers

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Message-ID: <20250530142447.166524-1-dakr@kernel.org>
Date: Fri, 30 May 2025 16:24:13 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: gregkh@...uxfoundation.org,
	rafael@...nel.org,
	ojeda@...nel.org,
	alex.gaynor@...il.com,
	boqun.feng@...il.com,
	gary@...yguo.net,
	bjorn3_gh@...tonmail.com,
	benno.lossin@...ton.me,
	a.hindborg@...nel.org,
	aliceryhl@...gle.com,
	tmgross@...ch.edu,
	chrisi.schrefl@...il.com
Cc: rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Danilo Krummrich <dakr@...nel.org>
Subject: [PATCH 0/7] misc device: support device drivers

This patch series adds support for device drivers to the misc device
abstraction.

For design details, please see:
  * patch 5 "rust: miscdevice: properly support device drivers"
  * patch 6 "rust: miscdevice: expose the parent device as &Device<Bound>"

This patch series depends on the pin-init series from Benno [1] as well as on
the misc device series from Christian [2], with UnsafePinned replaced with
Opaque, as suggested by Alice, since UnsafePinned may still take a while to
land.

A branch containing this series and its dependencies can be found in [3].

Thanks to Benno for his great help with pin-init!

[1] https://lore.kernel.org/rust-for-linux/20250529081027.297648-1-lossin@kernel.org/
[2] https://lore.kernel.org/lkml/20250517-b4-rust_miscdevice_registrationdata-v3-0-cdb33e228d37@gmail.com/
[3] https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/misc

Danilo Krummrich (7):
  rust: types: support fallible PinInit types in Opaque::pin_init
  rust: revocable: support fallible PinInit types
  rust: devres: support fallible in-place init for data
  rust: faux: impl AsRef<Device<Bound>> for Registration
  rust: miscdevice: properly support device drivers
  rust: miscdevice: expose the parent device as &Device<Bound>
  rust: sample: misc: implement device driver sample

 rust/kernel/devres.rs            |  27 ++-
 rust/kernel/faux.rs              |   4 +-
 rust/kernel/miscdevice.rs        | 341 ++++++++++++++++++++++---------
 rust/kernel/revocable.rs         |   7 +-
 rust/kernel/types.rs             |   8 +-
 samples/rust/Kconfig             |   8 +
 samples/rust/rust_misc_device.rs |  73 +++++--
 7 files changed, 350 insertions(+), 118 deletions(-)


base-commit: d5e34ea41dda1500a4dc163d6e96395fe7adc681
-- 
2.49.0