atomic infrastructure · Maintained

Maintainers

• M Will Deacon <will@kernel.org>
• M Peter Zijlstra <peterz@infradead.org>
• M Boqun Feng <boqun@kernel.org>
• R Mark Rutland <mark.rutland@arm.com>
• R Gary Guo <gary@garyguo.net>

Paths

• F Documentation/atomic_*.txt
• F arch/*/include/asm/atomic*.h
• F include/*/atomic*.h
• F include/linux/refcount.h
• F scripts/atomic/
• F rust/kernel/sync/atomic.rs
• F rust/kernel/sync/atomic/
• F rust/kernel/sync/refcount.rs

Last 30 days

Most active threads (last 7 days)

• WARM1d [PATCH 0/4] tracing: add ref_trace_final_put tracing
  2026-07-06 06:47 · 1 reply in 7d · Eugene Mavick <hidden>
• DORMANTno replies [PATCH 2/4] refcount: add ref_trace_final_put tracepoint
  2026-07-06 06:47 · 0 replies in 7d · Eugene Mavick <hidden>
• HOTtoday [PATCH 0/4] tracing: add ref_trace_final_put tracing
  2026-07-06 06:43 · 1 reply in 7d · Eugene Mavick <hidden>
• WARM1d [PATCH 0/4] tracing: add ref_trace_final_put tracing
  2026-07-05 01:21 · 1 reply in 7d · Eugene Mavick via B4 Relay <devnull+m.mavick.dev@kernel.org>
• HOTtoday [PATCH v13 00/15] barrier: Add smp_cond_load_{relaxed,acquire}_timeout()
  2026-07-02 01:34 · 1 reply in 7d · Ankur Arora <hidden>

Active reviewers (last 30 days)

• Catalin Marinas <catalin.marinas@arm.com>
  2 attestations (2 Acked-by) · last on 2026-07-02
• Danilo Krummrich <dakr@kernel.org>
  1 attestation (1 Acked-by) · last on 2026-06-09
• Alice Ryhl <aliceryhl@google.com>
  1 attestation (1 Reviewed-by) · last on 2026-06-09
• Alexandre Courbot <acourbot@nvidia.com>
  1 attestation (1 Acked-by) · last on 2026-06-09
• FUJITA Tomonori <fujita.tomonori@gmail.com>
  1 attestation (1 Acked-by) · last on 2026-06-09
• Boqun Feng <boqun@kernel.org>
  1 attestation (1 Acked-by) · last on 2026-06-09

Recent patches

Most-recent 30 patches in this subsystem on lkml (capped at 30), ordered by date desc.

• DORMANTno replies [PATCH 2/4] refcount: add ref_trace_final_put tracepoint
  2026-07-06 · Eugene Mavick <hidden>
• DORMANTno replies [PATCH 2/4] refcount: add ref_trace_final_put tracepoint
  2026-07-06 · Eugene Mavick <hidden>
• HOTtoday [PATCH 2/4] refcount: add ref_trace_final_put tracepoint
  2026-07-06 · Eugene Mavick <hidden>
• WARM1d [PATCH 2/4] refcount: add ref_trace_final_put tracepoint
  2026-07-05 · Eugene Mavick via B4 Relay <devnull+m.mavick.dev@kernel.org>
• HOTtoday REVIEWED: 3 (3M) [PATCH v13 08/15] locking/atomic: scripts: build atomic_long_cond_read_*_timeout()
  2026-07-02 · Ankur Arora <hidden>
• COOLING6d [PATCH 2/2] rust: kernel: migrate to cfg_select! for config-based selection
  2026-06-29 · Nika Krasnova <hidden>
• COOLING5d [PATCH v2 2/4] rust: sync: generic memory barriers
  2026-06-09 · Gary Guo <gary@garyguo.net>
• COLD24d REVIEWED: 46 (46M) [PATCH v4] rust: make `build_assert` module the home of related macros
  2026-06-09 · Gary Guo <gary@kernel.org>
• COLD22d REVIEWED: 3 (3M) [PATCH v12 08/15] locking/atomic: scripts: build atomic_long_cond_read_*_timeout()
  2026-06-08 · Ankur Arora <hidden>
• COLD32d [PATCH v4 1/2] rust: sync: atomic: add atomic_per_byte_memcpy
  2026-06-05 · Andreas Hindborg <a.hindborg@kernel.org>
• COLD45d Re: Linux 7.0.10
  2026-05-23 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.18.33
  2026-05-23 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies [PATCH v2] rust: sync: atomic: clarify AtomicAdd safety comment
  2026-04-28 · Sagar Taunk <hidden>
• STALE70d [PATCH 2/2] rust: sync: atomic: clarify AtomicAdd safety comment
  2026-04-27 · Sagar Taunk <hidden>
• COLD29d [PATCH 2/3] rust: testing: add Kconfig for KUnit test
  2026-04-17 · Yury Norov <hidden>
• COLD29d [PATCH 1/3] rust: tests: drop 'use crate' in bitmap and atomic KUnit tests
  2026-04-17 · Yury Norov <hidden>
• COLD46d REVIEWED: 3 (3M) [PATCH v11 08/14] locking/atomic: scripts: build atomic_long_cond_read_*_timeout()
  2026-04-08 · Ankur Arora <hidden>
• STALE85d [PATCH 2/3] rust: sync: generic memory barriers
  2026-04-02 · Gary Guo <gary@kernel.org>
• STALE87d [PATCH 1/5] refcount: Remove unused __signed_wrap function annotations
  2026-03-31 · Kees Cook <kees@kernel.org>
• STALE99d [PATCH v3 4/4] rust: make `build_assert` module the home of related macros
  2026-03-19 · Gary Guo <gary@kernel.org>
• STALE112d [PATCH v2 4/4] rust: make `build_assert` module the home of related macros
  2026-03-16 · Gary Guo <gary@kernel.org>
• STALE95d REVIEWED: 3 (3M) [PATCH v10 08/12] locking/atomic: scripts: build atomic_long_cond_read_*_timeout()
  2026-03-16 · Ankur Arora <hidden>
• DORMANTno replies REVIEWED: 16 (16M) [tip: locking/core] rust: sync: atomic: Remove bound `T: Sync` for `Atomic::from_ptr()`
  2026-03-09 · tip-bot2 for Boqun Feng <hidden>
• STALE119d REVIEWED: 16 (16M) [tip: locking/core] rust: sync: atomic: Add example for Atomic::get_mut()
  2026-03-09 · tip-bot2 for FUJITA Tomonori <hidden>
• STALE119d REVIEWED: 4 (4M) [tip: locking/core] rust: sync: atomic: Clarify the need of CONFIG_ARCH_SUPPORTS_ATOMIC_RMW
  2026-03-09 · tip-bot2 for Boqun Feng <hidden>
• STALE119d REVIEWED: 9 (9M) [tip: locking/core] rust: sync: atomic: Add Atomic<*{mut,const} T> support
  2026-03-09 · tip-bot2 for Boqun Feng <hidden>
• STALE119d REVIEWED: 4 (4M) [tip: locking/core] rust: sync: atomic: Add performance-optimal Flag type for atomic booleans
  2026-03-09 · tip-bot2 for FUJITA Tomonori <hidden>
• STALE119d REVIEWED: 12 (12M) [tip: locking/core] rust: sync: atomic: Add fetch_sub()
  2026-03-09 · tip-bot2 for Andreas Hindborg <hidden>
• STALE119d REVIEWED: 16 (16M) [tip: locking/core] rust: sync: atomic: Add atomic operation helpers over raw pointers
  2026-03-09 · tip-bot2 for Boqun Feng <hidden>
• STALE119d REVIEWED: 12 (12M) [tip: locking/core] rust: atomic: Update a safety comment in impl of `fetch_add()`
  2026-03-09 · tip-bot2 for Andreas Hindborg <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE175d REVIEWED: 8 (8M) [PATCH 17/36] rust: sync: atomic: Add i8/i16 load and store support
  2026-01-11 · Boqun Feng <hidden> · 2 Reviewed-by
• STALE175d REVIEWED: 8 (8M) [PATCH 18/36] rust: sync: atomic: Add store_release/load_acquire tests
  2026-01-11 · Boqun Feng <hidden> · 2 Reviewed-by
• STALE175d REVIEWED: 4 (4M) [PATCH 20/36] rust: sync: atomic: Add atomic bool support via i8 representation
  2026-01-11 · Boqun Feng <hidden> · 1 Reviewed-by
• STALE175d REVIEWED: 4 (4M) [PATCH 21/36] rust: sync: atomic: Add atomic bool tests
  2026-01-11 · Boqun Feng <hidden> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 4 (4M) [tip: locking/core] rust: sync: atomic: Add atomic bool tests
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 4 (4M) [tip: locking/core] rust: sync: atomic: Add atomic bool support via i8 representation
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden> · 1 Reviewed-by
• STALE175d REVIEWED: 8 (8M) [tip: locking/core] rust: sync: atomic: Add store_release/load_acquire tests
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden> · 2 Reviewed-by
• STALE175d REVIEWED: 8 (8M) [tip: locking/core] rust: sync: atomic: Add i8/i16 load and store support
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden> · 2 Reviewed-by
• STALE165d REVIEWED: 9 (9M) [PATCH v2 2/2] rust: sync: atomic: Add Atomic<*{mut,const} T> support
  2026-01-20 · Boqun Feng <hidden> · 2 Reviewed-by
• STALE132d REVIEWED: 12 (12M) [PATCH v3 1/3] rust: atomic: add fetch_sub
  2026-02-20 · Andreas Hindborg <a.hindborg@kernel.org> · 1 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE167d [PATCH v8 08/12] locking/atomic: scripts: build atomic_long_cond_read_*_timeout()
  2025-12-15 · Ankur Arora <hidden>
• STALE161d [tip: locking/core] compiler-context-analysis: Change __cond_acquires to take return value
  2026-01-05 · tip-bot2 for Marco Elver <hidden>
• DORMANTno replies [tip: locking/core] scripts/atomic: Fix kerneldoc spelling in try_cmpxchg()
  2026-01-08 · tip-bot2 for oldzhu <hidden>
• STALE175d [PATCH 15/36] rust: sync: atomic: Prepare AtomicOps macros for i8/i16 support
  2026-01-11 · Boqun Feng <hidden>
• STALE175d [PATCH 19/36] rust: sync: atomic: Add i8/i16 xchg and cmpxchg support
  2026-01-11 · Boqun Feng <hidden>
• STALE175d [PATCH 35/36] rust: helpers: Move #define __rust_helper out of atomic.c
  2026-01-11 · Boqun Feng <hidden>
• DORMANTno replies [tip: locking/core] rust: helpers: Move #define __rust_helper out of atomic.c
  2026-01-13 · tip-bot2 for Alice Ryhl <hidden>
• STALE175d [tip: locking/core] rust: sync: atomic: Add i8/i16 xchg and cmpxchg support
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden>
• DORMANTno replies [tip: locking/core] rust: sync: atomic: Prepare AtomicOps macros for i8/i16 support
  2026-01-13 · tip-bot2 for FUJITA Tomonori <hidden>
• DORMANTno replies Re: Linux 6.18.9
  2026-02-06 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>