linux-kernel - [GIT PULL] [PATCH 0/4] Rust locking changes for v6.18

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Message-ID: <20250919091241.32138-1-boqun.feng@gmail.com>
Date: Fri, 19 Sep 2025 11:12:37 +0200
From: Boqun Feng <boqun.feng@...il.com>
To: "Peter Zijlstra" <peterz@...adead.org>,
	"Ingo Molnar" <mingo@...nel.org>,
	"Thomas Gleixner" <tglx@...utronix.de>
Cc: rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	lkmm@...ts.linux.dev,
	"Will Deacon" <will@...nel.org>,
	"Peter Zijlstra" <peterz@...radead.org>,
	Waiman Long <longman@...hat.com>,
	"Miguel Ojeda" <ojeda@...nel.org>,
	alex.gaynor@...il.com,
	"Gary Guo" <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	"Benno Lossin" <lossin@...nel.org>,
	"Alice Ryhl" <aliceryhl@...gle.com>,
	"Trevor Gross" <tmgross@...ch.edu>,
	"Danilo Krummrich" <dakr@...nel.org>,
	"Andreas Hindborg" <a.hindborg@...nel.org>,
	Boqun Feng <boqun.feng@...il.com>
Subject: [GIT PULL] [PATCH 0/4] Rust locking changes for v6.18

Hi Peter & Ingo,

Please pull this (mostly) Rust locking changes to tip. It's a bit late
than usual because I was at Kangrejos conference this week, however the
changes are relatively small and simple, so I think it's Ok for v6.18.
I also try using "git notes" for submission links as Thomas suggests,
let see how it goes ;-)

The following changes since commit 17d9f8eaa87d40a2ff66598875a43363e37a909b:

  MAINTAINERS: update atomic infrastructure entry to include Rust (2025-09-15 09:38:36 +0200)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/boqun/linux.git/ tags/rust-locking.2025.09.19a

for you to fetch changes up to 9622209360c25d78a81048a9db72f1efef7fbc58:

  rust: lock: Add a Pin<&mut T> accessor (2025-09-15 22:28:35 -0400)

Regards,
Boqun

----------------------------------------------------------------
Locking changes for v6.18:

- Fix a data-race in do_raw_write_lock reported by KCSAN

Rust locking changes for v6.18

- Make `data` in `Lock` structurally pinned.

  Previously the `data` field of a `Lock<T>` is not structurally pinned,
  and it's impossible to initialize the `data` field with a
  pin-initializer, hence e.g. a `Lock<T>` where T is a pin-initialized
  type is not supported. This encourages workarounds like
  `Lock<Pin<KBox<T>>`, which is more complicated and less efficient.
  Therefore make the `data` field in `Lock` structurally pinned to
  support pin-initialized types in a `Lock<T>`.

  Since the `data` field is structurally pinned, make `Guard<T, ...>`
  only `DerefMut` is T is Unpin, otherwise `Guard::as_mut()` is added to
  provide a `Pin<&mut T>`. This is different than normal Rust standand
  library locks.
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----------------------------------------------------------------
Alexander Sverdlin (1):
      locking/spinlock/debug: Fix data-race in do_raw_write_lock

Daniel Almeida (3):
      rust: lock: guard: Add T: Unpin bound to DerefMut
      rust: lock: Pin the inner data
      rust: lock: Add a Pin<&mut T> accessor

 kernel/locking/spinlock_debug.c |  4 ++--
 rust/kernel/sync/lock.rs        | 41 +++++++++++++++++++++++++++++++++++++----
 rust/kernel/sync/lock/global.rs |  5 ++++-
 3 files changed, 43 insertions(+), 7 deletions(-)