• Linus Torvalds's avatar
    Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 6ffbe7d1
    Linus Torvalds authored
    Pull core locking changes from Ingo Molnar:
     - futex performance increases: larger hashes, smarter wakeups
     - mutex debugging improvements
     - lots of SMP ordering documentation updates
     - introduce the smp_load_acquire(), smp_store_release() primitives.
       (There are WIP patches that make use of them - not yet merged)
     - lockdep micro-optimizations
     - lockdep improvement: better cover IRQ contexts
     - liblockdep at last. We'll continue to monitor how useful this is
    
    * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
      futexes: Fix futex_hashsize initialization
      arch: Re-sort some Kbuild files to hopefully help avoid some conflicts
      futexes: Avoid taking the hb->lock if there's nothing to wake up
      futexes: Document multiprocessor ordering guarantees
      futexes: Increase hash table size for better performance
      futexes: Clean up various details
      arch: Introduce smp_load_acquire(), smp_store_release()
      arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h
      arch: Move smp_mb__{before,after}_atomic_{inc,dec}.h into asm/atomic.h
      locking/doc: Rename LOCK/UNLOCK to ACQUIRE/RELEASE
      mutexes: Give more informative mutex warning in the !lock->owner case
      powerpc: Full barrier for smp_mb__after_unlock_lock()
      rcu: Apply smp_mb__after_unlock_lock() to preserve grace periods
      Documentation/memory-barriers.txt: Downgrade UNLOCK+BLOCK
      locking: Add an smp_mb__after_unlock_lock() for UNLOCK+BLOCK barrier
      Documentation/memory-barriers.txt: Document ACCESS_ONCE()
      Documentation/memory-barriers.txt: Prohibit speculative writes
      Documentation/memory-barriers.txt: Add long atomic examples to memory-barriers.txt
      Documentation/memory-barriers.txt: Add needed ACCESS_ONCE() calls to memory-barriers.txt
      Revert "smp/cpumask: Make CONFIG_CPUMASK_OFFSTACK=y usable without debug dependency"
      ...
    6ffbe7d1
MAINTAINERS 263 KB