Merge tag 'locking-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
"Mostly Rust runtime enhancements:

- Add initial support for

Merge tag 'locking-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
"Mostly Rust runtime enhancements:

- Add initial support for generic LKMM atomic variables in Rust (Boqun Feng)

- Add the wrapper for `refcount_t` in Rust (Gary Guo)

- Add a new reviewer, Gary Guo"

* tag 'locking-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: update atomic infrastructure entry to include Rust
rust: block: convert `block::mq` to use `Refcount`
rust: convert `Arc` to use `Refcount`
rust: make `Arc::into_unique_or_drop` associated function
rust: implement `kernel::sync::Refcount`
rust: sync: Add memory barriers
rust: sync: atomic: Add Atomic<{usize,isize}>
rust: sync: atomic: Add Atomic<u{32,64}>
rust: sync: atomic: Add the framework of arithmetic operations
rust: sync: atomic: Add atomic {cmp,}xchg operations
rust: sync: atomic: Add generic atomics
rust: sync: atomic: Add ordering annotation types
rust: sync: Add basic atomic operation mapping framework
rust: Introduce atomic API helpers

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rust: Introduce atomic API helpers

In order to support LKMM atomics in Rust, add rust_helper_* for atomic
APIs. These helpers ensure the implementation of LKMM atomics in Rust is
the same as in C. T

rust: Introduce atomic API helpers

In order to support LKMM atomics in Rust, add rust_helper_* for atomic
APIs. These helpers ensure the implementation of LKMM atomics in Rust is
the same as in C. This could save the maintenance burden of having two
similar atomic implementations in asm.

Originally-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/all/20250719030827.61357-2-boqun.feng@gmail.com/

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