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)

• WARM1d [PATCH v19 00/40] DEPT(DEPendency Tracker)
  2026-07-06 06:21 · 3 replies in 7d · Byungchul Park <byungchul@sk.com>

Recent patches

Most-recent 29 patches in this subsystem on linux-rt-devel, ordered by date desc.

• WARM1d [PATCH v19 29/40] dept: make dept aware of lockdep_set_lock_cmp_fn() annotation
  2026-07-06 · Byungchul Park <byungchul@sk.com>
• WARM1d [PATCH v19 24/40] locking/lockdep: prevent various lockdep assertions when lockdep_off()'ed
  2026-07-06 · Byungchul Park <byungchul@sk.com>
• WARM1d [PATCH v19 04/40] dept: tie to lockdep and IRQ tracing
  2026-07-06 · Byungchul Park <byungchul@sk.com>
• COLD43d [PATCH v4 1/4] Introducing pw_lock() and per-cpu queue & flush work
  2026-05-19 · Leonardo Bras <hidden>
• COLD58d REVIEWED: 1 (1M) [PATCH 1/7] locking/rt: Use raw_spin_lock_irqsave() in __rwbase_read_unlock()
  2026-05-08 · David Woodhouse <dwmw2@infradead.org>
• STALE61d Re: [PATCH] KVM: x86/xen: bail in IRQ context on PREEMPT_RT in kvm_xen_set_evtchn_fast()
  2026-05-07 · David Woodhouse <dwmw2@infradead.org>
• STALE126d [RFC PATCH] sched/proxy_exec: Extend PE blocked_on chain to rwsem write-side
  2026-03-04 · <hidden>
• WARM3d [PATCH v18 29/42] dept: make dept aware of lockdep_set_lock_cmp_fn() annotation
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• WARM3d [PATCH v18 24/42] locking/lockdep: prevent various lockdep assertions when lockdep_off()'ed
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• WARM3d [PATCH v18 04/42] dept: tie to lockdep and IRQ tracing
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• STALE220d Re: [PATCH v17 28/47] dept: add documentation for dept
  2025-10-03 · Bagas Sanjaya <hidden>
• STALE220d [PATCH v17 33/47] dept: make dept aware of lockdep_set_lock_cmp_fn() annotation
  2025-10-02 · Byungchul Park <byungchul@sk.com>
• STALE220d [PATCH v17 27/47] locking/lockdep: prevent various lockdep assertions when lockdep_off()'ed
  2025-10-02 · Byungchul Park <byungchul@sk.com>
• STALE220d [PATCH v17 05/47] dept: tie to lockdep and IRQ tracing
  2025-10-02 · Byungchul Park <byungchul@sk.com>
• STALE321d LANDED [PATCH v2 2/3] Documentation: locking: Add local_lock_nested_bh() to locktypes
  2025-08-15 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• STALE321d LANDED: 1 (1M) [PATCH v2 1/3] Documentation: seqlock: Add a SPDX license identifier
  2025-08-15 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• STALE328d [PATCH 1/3] Documentation: seqlock: Add a reference label and license.
  2025-07-15 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• STALE328d [PATCH 2/3] Documentation: locking: Add local_lock_nested_bh() to locktypes
  2025-07-15 · Sebastian Andrzej Siewior <bigeasy@linutronix.de>
• STALE388d Re: BUG: scheduling while atomic with PREEMPT_RT=y and bpf selftests
  2025-06-15 · Bert Karwatzki <hidden>
• DORMANTno replies [PATCH AUTOSEL 5.4] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE478d [PATCH AUTOSEL 5.10 1/2] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE478d [PATCH AUTOSEL 5.15 1/4] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE478d [PATCH AUTOSEL 6.1 1/4] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE476d [PATCH AUTOSEL 6.6 3/8] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE478d [PATCH AUTOSEL 6.12 06/13] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE478d [PATCH AUTOSEL 6.13 07/16] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-17 · Sasha Levin <sashal@kernel.org>
• STALE488d LANDED: 9 (9M) [PATCH locking 05/11] locking/lockdep: Disable KASAN instrumentation of lockdep.c
  2025-03-07 · Boqun Feng <hidden>
• STALE488d LANDED [PATCH locking 02/11] locking/semaphore: Use wake_q to wake up processes outside lock critical section
  2025-03-07 · Boqun Feng <hidden>
• STALE565d [PATCH] lockdep: Fix wait context check on softirq for PREEMPT_RT
  2024-12-02 · Ryo Takakura <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.

• COLD58d REVIEWED: 1 (1M) [PATCH 1/7] locking/rt: Use raw_spin_lock_irqsave() in __rwbase_read_unlock()
  2026-05-08 · David Woodhouse <dwmw2@infradead.org> · 1 Reviewed-by