linux-kernel - [GIT PULL] locking changes for v6.1

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Date:   Fri, 7 Oct 2022 10:12:13 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>
Subject: [GIT PULL] locking changes for v6.1

Linus,

Please pull the latest locking/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-2022-10-07

   # HEAD: 76e64c73db9542ff4bae8a60f4f32e38f3799b95 locking/lockdep: Print more debug information - report name and key when look_up_lock_class() got confused

Locking changes for v6.1:

 - Disable preemption in rwsem_write_trylock()'s attempt to
   take the rwsem, to avoid RT tasks hogging the CPU, which
   managed to preempt this function after the owner has
   been cleared but before a new owner is set. Also add
   debug checks to enforce this.

 - Add __lockfunc to more slow path functions and add
   __sched to semaphore functions.

 - Mark spinlock APIs noinline when the respective CONFIG_INLINE_SPIN_*
   toggles are disabled, to reduce LTO text size.

 - Print more debug information when lockdep gets confused
   in look_up_lock_class().

 - Improve header file abuse checks.

 - Misc cleanups

 Thanks,

	Ingo

------------------>
Andi Kleen (1):
      locking/spinlocks: Mark spinlocks noinline when inline spinlocks are disabled

Gokul krishna Krishnakumar (1):
      locking/rwsem: Disable preemption while trying for rwsem lock

Namhyung Kim (2):
      locking: Add __lockfunc to slow path functions
      locking: Add __sched to semaphore functions

Sebastian Andrzej Siewior (1):
      locking: Detect includes rwlock.h outside of spinlock.h

Slark Xiao (1):
      selftests: futex: Fix 'the the' typo in comment

Tetsuo Handa (1):
      locking/lockdep: Print more debug information - report name and key when look_up_lock_class() got confused


 arch/x86/include/asm/qspinlock_paravirt.h          | 13 ++---
 include/linux/rwlock.h                             |  2 +-
 include/linux/spinlock.h                           |  2 +
 include/linux/spinlock_api_smp.h                   |  2 +-
 include/linux/spinlock_api_up.h                    |  2 +-
 include/linux/spinlock_rt.h                        |  2 +-
 include/linux/spinlock_up.h                        |  2 +-
 kernel/locking/lockdep.c                           |  6 ++-
 kernel/locking/qrwlock.c                           |  4 +-
 kernel/locking/qspinlock.c                         |  2 +-
 kernel/locking/qspinlock_paravirt.h                |  4 +-
 kernel/locking/rwsem.c                             | 14 +++++-
 kernel/locking/semaphore.c                         | 12 ++---
 kernel/locking/spinlock.c                          | 56 +++++++++++-----------
 .../functional/futex_requeue_pi_signal_restart.c   |  2 +-
 15 files changed, 70 insertions(+), 55 deletions(-)