locking primitives · Maintained

Maintainers

• M Peter Zijlstra <peterz@infradead.org>
• M Ingo Molnar <mingo@redhat.com>
• M Will Deacon <will@kernel.org>
• M Boqun Feng <boqun@kernel.org>
• R Waiman Long <longman@redhat.com>

Paths

• F Documentation/locking/
• F arch/*/include/asm/spinlock*.h
• F include/linux/local_lock*.h
• F include/linux/lockdep*.h
• F include/linux/mutex*.h
• F include/linux/rwlock*.h
• F include/linux/rwsem*.h
• F include/linux/seqlock.h
• F include/linux/spinlock*.h
• F kernel/locking/
• F lib/locking*.[ch]
• F rust/helpers/mutex.c
• F rust/helpers/spinlock.c
• F rust/kernel/sync/lock.rs
• F rust/kernel/sync/lock/
• F rust/kernel/sync/locked_by.rs
• X kernel/locking/locktorture.c

Last 30 days

Most active threads (last 7 days)

• DORMANTno replies Linux 7.2.7
  2026-09-21 13:31 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Linux 6.18.53
  2026-09-21 13:31 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• WARM3d Linux 6.12.111
  2026-09-21 13:31 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Active reviewers (last 30 days)

• Waiman Long <longman@redhat.com>
  7 attestations (7 Reviewed-by) · last on 2026-09-12
• Dmitry Ilvokhin <hidden>
  7 attestations (7 Reviewed-by) · last on 2026-09-12
• Yao Kai <hidden>
  5 attestations (5 Reported-by) · last on 2026-09-10
• <hidden>
  3 attestations (3 Reported-by) · last on 2026-09-17

Recent patches

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

• WARM3d Re: Linux 7.2.7
  2026-09-21 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• WARM3d Re: Linux 6.18.53
  2026-09-21 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.12.111
  2026-09-21 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• WARM2d [PATCH 6.12 0597/1102] locking/lockdep: Invalidate stale class_cache entries for zapped classes
  2026-09-17 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING5d [PATCH 6.18 0709/1250] locking/lockdep: Invalidate stale class_cache entries for zapped classes
  2026-09-17 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING5d [PATCH 7.2 173/733] locking/lockdep: Invalidate stale class_cache entries for zapped classes
  2026-09-17 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING10d Re: Linux 6.12.110
  2026-09-14 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.6.157
  2026-09-14 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING10d Re: Linux 6.1.188
  2026-09-14 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 5.15.221
  2026-09-14 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 5.10.270
  2026-09-14 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING8d REVIEWED: 3 (2M) [PATCH 5.10 552/798] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING4d REVIEWED: 3 (2M) [PATCH 5.15 643/935] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• WARM3d REVIEWED: 3 (2M) [PATCH 6.1 0792/1191] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING10d REVIEWED: 3 (2M) [PATCH 6.6 0966/1424] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• WARM2d REVIEWED: 3 (2M) [PATCH 6.12 0794/1376] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d REVIEWED: 3 (2M) [PATCH 6.18 0718/1518] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING8d REVIEWED: 3 (2M) [PATCH 7.2 0848/1815] locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
  2026-09-12 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING13d Re: Linux 7.2.5
  2026-09-11 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies [PATCH 6.12.y 2/2] futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
  2026-09-10 · Sasha Levin <sashal@kernel.org>
• DORMANTno replies [PATCH 6.18.y 3/3] futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
  2026-09-10 · Sasha Levin <sashal@kernel.org>
• COOLING14d FAILED: patch "[PATCH] futex: Provide rt_mutex_.*_schedule() equivalents for futex" failed to apply to 6.18-stable tree
  2026-09-08 · <gregkh@linuxfoundation.org>
• COOLING14d FAILED: patch "[PATCH] futex: Provide rt_mutex_.*_schedule() equivalents for futex" failed to apply to 6.12-stable tree
  2026-09-08 · <gregkh@linuxfoundation.org>
• DORMANTno replies [tip: locking/urgent] futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
  2026-09-04 · tip-bot2 for Sebastian Andrzej Siewior <hidden>
• COLD32d Re: Linux 6.1.184
  2026-08-23 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 5.15.217
  2026-08-23 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.1.183
  2026-08-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COLD49d [PATCH 6.12.y 2/2] sched/wake_q: Add helper to call wake_up_q after unlock with preemption disabled
  2026-08-06 · Simon Liebold <hidden>
• COLD49d REVIEWED: 5 (3M) [PATCH 6.12.y 1/2] locking/mutex: Make mutex::wait_lock irq safe
  2026-08-06 · Simon Liebold <hidden>
• COLD52d Re: Linux 7.1.6
  2026-08-03 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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.

• DORMANTno replies REVIEWED: 3 (2M) [PATCH v3] lockdep: fix NULL pointer dereference in __lock_set_class()
  2026-07-08 · Xiang Gao <hidden> · 2 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.

• DORMANTno replies Re: Linux 6.12.86
  2026-05-07 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE140d Re: Linux 6.18.27
  2026-05-07 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 7.0.4
  2026-05-07 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.6.140
  2026-05-17 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE125d [PATCH 7.0 0043/1146] locking/mutex: Rename mutex_init_lockep()
  2026-05-20 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE124d Re: Linux 7.0.10
  2026-05-23 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE115d Re: Linux 6.1.175
  2026-06-01 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.18.36
  2026-06-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE97d Re: Linux 7.0.13
  2026-06-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE82d Re: Linux 6.1.177
  2026-07-04 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>