linux-kernel - [PATCH 0/2] Provide Rust atomic helpers over raw pointers

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Message-ID: <20260120115207.55318-1-boqun.feng@gmail.com>
Date: Tue, 20 Jan 2026 19:52:05 +0800
From: Boqun Feng <boqun.feng@...il.com>
To: linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	kasan-dev@...glegroups.com
Cc: Will Deacon <will@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Mark Rutland <mark.rutland@....com>,
	Gary Guo <gary@...yguo.net>,
	Miguel Ojeda <ojeda@...nel.org>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>,
	Elle Rhumsaa <elle@...thered-steel.dev>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Marco Elver <elver@...gle.com>,
	FUJITA Tomonori <fujita.tomonori@...il.com>
Subject: [PATCH 0/2] Provide Rust atomic helpers over raw pointers

[1] indicates that there might be need for Rust to synchronize with C
over atomic, currently the recommendation is using
`Atomic::from_ptr().op()`, however, it's more convenient to have helper
wrapper that directly perform operation over pointers. Hence add them
for load()/store()/xchg()/cmpxgh().

While working on this, I also found an issue in `from_ptr()`, therefore
fix it.

[1]: https://lore.kernel.org/rust-for-linux/20251231-rwonce-v1-0-702a10b85278@google.com/

Regards,
Boqun

Boqun Feng (2):
  rust: sync: atomic: Remove bound `T: Sync` for `Atomci::from_ptr()`
  rust: sync: atomic: Add atomic operation helpers over raw pointers

 rust/kernel/sync/atomic.rs           | 109 ++++++++++++++++++++++++++-
 rust/kernel/sync/atomic/predefine.rs |  46 +++++++++++
 2 files changed, 151 insertions(+), 4 deletions(-)

-- 
2.51.0