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

1 files changed, 4 insertions, 0 deletions

diff --git a/rust/kernel/sync.rs b/rust/kernel/sync.rs
index 00f9b558a3ad..cf5b638a097d 100644
--- a/rust/kernel/sync.rs
+++ b/rust/kernel/sync.rs
@@ -11,12 +11,15 @@ use pin_init;
 
 mod arc;
 pub mod aref;
+pub mod atomic;
+pub mod barrier;
 pub mod completion;
 mod condvar;
 pub mod lock;
 mod locked_by;
 pub mod poll;
 pub mod rcu;
+mod refcount;
 
 pub use arc::{Arc, ArcBorrow, UniqueArc};
 pub use completion::Completion;
@@ -25,6 +28,7 @@ pub use lock::global::{global_lock, GlobalGuard, GlobalLock, GlobalLockBackend,
 pub use lock::mutex::{new_mutex, Mutex, MutexGuard};
 pub use lock::spinlock::{new_spinlock, SpinLock, SpinLockGuard};
 pub use locked_by::LockedBy;
+pub use refcount::Refcount;
 
 /// Represents a lockdep class. It's a wrapper around C's `lock_class_key`.
 #[repr(transparent)]