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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