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linux/kernel/futex
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Linus Torvalds c8990f3179 Misc locking fixes: 
- Fix a softirq processing delay bug in local_interrupt_disable(),
    which should mostly only affect the Rust runtime (Boqun Feng)
 
  - Remove the hardirq_disable_count() function which caused the
    previous bug and is now unused & unnecessary (Boqun Feng)
 
  - lockdep: Invalidate stale class_cache entries for zapped classes
    (Eric Dumazet)
 
  - Fix rt_mutex specific futex scheduling helpers
    (Sebastian Andrzej Siewior)
 
  - Fix rcuwait use-after-free race during futex requeue PI (Yao Kai)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fixes from Ingo Molnar:

 - Fix a softirq processing delay bug in local_interrupt_disable(),
   which should mostly only affect the Rust runtime (Boqun Feng)

 - Remove the hardirq_disable_count() function which caused the
   previous bug and is now unused & unnecessary (Boqun Feng)

 - lockdep: Invalidate stale class_cache entries for zapped classes
   (Eric Dumazet)

 - Fix rt_mutex specific futex scheduling helpers
   (Sebastian Andrzej Siewior)

 - Fix rcuwait use-after-free race during futex requeue PI (Yao Kai)

* tag 'locking-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Prevent rcuwait use-after-free during requeue PI
  futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
  locking/lockdep: Invalidate stale class_cache entries for zapped classes
  preempt: Remove hardirq_disable_count()
  interrupt: Disable interrupt before modifying hardirq_disable counter
2026-09-06 10:45:46 -07:00
..
core.c treewide: refresh kmalloc_obj() conversions 2026-09-04 21:37:00 -07:00
futex.h futex: Optimize futex hash bucket access patterns 2026-06-11 13:41:24 +02:00
Makefile futex: Convert to compiler context analysis 2026-03-16 13:16:48 +01:00
pi.c futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling 2026-09-04 08:14:15 +02:00
requeue.c futex: Prevent rcuwait use-after-free during requeue PI 2026-09-04 08:14:15 +02:00
syscalls.c futex: Add support for unlocking robust futexes 2026-06-03 11:38:51 +02:00
waitwake.c futex: Optimize futex hash bucket access patterns 2026-06-11 13:41:24 +02:00