linux-kernel - [PATCH v2 0/3] rust: add `UnsafePinned` type

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Message-Id: <20250430-rust_unsafe_pinned-v2-0-fc8617a74024@gmail.com>
Date: Wed, 30 Apr 2025 10:36:10 +0200
From: Christian Schrefl <chrisi.schrefl@...il.com>
To: Sky <sky@...9.dev>, 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>, Danilo Krummrich <dakr@...nel.org>, 
 Gerald Wisböck <gerald.wisboeck@...ther.ink>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
 Christian Schrefl <chrisi.schrefl@...il.com>
Subject: [PATCH v2 0/3] rust: add `UnsafePinned` type

This version now only has the kernel implementation without the
config flag for using the upstream version. Additionally now
commits for using `UnsafePinned` in `Opaque` were added.

Checkpatch warns about `rust/kernel/types/unsafe_pinned.rs`
missing a MAINTAINERS entry, I don't think that is necessary since it
will be part of the `RUST` entry anyways (from what I understand).

Once this has had some time to review I'll rebase my `miscdevice`
patches [0] on top of this.

This patchset depends on the `pin-init` sync for v6.16 [1].

Link: https://lore.kernel.org/rust-for-linux/20250131-b4-rust_miscdevice_registrationdata-v2-0-588f1e6cfabe@gmail.com/ [0]
Link: https://lore.kernel.org/rust-for-linux/20250421221728.528089-1-benno.lossin@proton.me [1]

Signed-off-by: Christian Schrefl <chrisi.schrefl@...il.com>
---
Changes in v2:
- Expanded `UnsafePinned` documentation to describe differences
    with upstream rust implementation.
- Removed config flag for using upstream `UnsafePinned` type.
- Add patch implementing `Wrapper` for `Opaque`
- Add patch for using `UnsafePinned` internally in `Opaque`
- Link to v1: https://lore.kernel.org/r/20250418-rust_unsafe_pinned-v1-1-c4c7558399f8@gmail.com

---
Christian Schrefl (3):
      rust: add UnsafePinned type
      rust: implement `Wrapper<T>` for `Opaque<T>`
      rust: use `UnsafePinned` in the implementation of `Opaque`

 init/Kconfig                       |   3 +
 rust/kernel/lib.rs                 |   1 +
 rust/kernel/revocable.rs           |   2 +
 rust/kernel/types.rs               |  42 +++++++-------
 rust/kernel/types/unsafe_pinned.rs | 115 +++++++++++++++++++++++++++++++++++++
 5 files changed, 143 insertions(+), 20 deletions(-)
---
base-commit: 39051adb070432b283e6c11b2b24937281b9f97f
change-id: 20250418-rust_unsafe_pinned-891dce27418d
prerequisite-message-id: <20250421221728.528089-1-benno.lossin@...ton.me>
prerequisite-patch-id: dcf79c049766e66eda0377b225bb441edefcdfe4
prerequisite-patch-id: 0a078ba4989327e90317f882fa42a387bb7594a0
prerequisite-patch-id: d5182c6fc3e3b2f255001334b5da9d5c5b7b29ed
prerequisite-patch-id: 016806607094f0f403000ec455db9ea79e538bf6
prerequisite-patch-id: 368bea523f3b3e14f1dd599343475e0b166fad37
prerequisite-patch-id: 526054a8a8871d1dd5f376b7ab6aa5542b481b70
prerequisite-patch-id: a691b331bc3200287413e6423b8cc3e9cbb177e0
prerequisite-patch-id: 5afb38f41b18408fef4d3abc5750c09a67b2d34e

Best regards,
-- 
Christian Schrefl <chrisi.schrefl@...il.com>