• Linus Torvalds's avatar
    Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0200fbdd
    Linus Torvalds authored
    Pull locking and misc x86 updates from Ingo Molnar:
     "Lots of changes in this cycle - in part because locking/core attracted
      a number of related x86 low level work which was easier to handle in a
      single tree:
    
       - Linux Kernel Memory Consistency Model updates (Alan Stern, Paul E.
         McKenney, Andrea Parri)
    
       - lockdep scalability improvements and micro-optimizations (Waiman
         Long)
    
       - rwsem improvements (Waiman Long)
    
       - spinlock micro-optimization (Matthew Wilcox)
    
       - qspinlocks: Provide a liveness guarantee (more fairness) on x86.
         (Peter Zijlstra)
    
       - Add support for relative references in jump tables on arm64, x86
         and s390 to optimize jump labels (Ard Biesheuvel, Heiko Carstens)
    
       - Be a lot less permissive on weird (kernel address) uaccess faults
         on x86: BUG() when uaccess helpers fault on kernel addresses (Jann
         Horn)
    
       - macrofy x86 asm statements to un-confuse the GCC inliner. (Nadav
         Amit)
    
       - ... and a handful of other smaller changes as well"
    
    * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (57 commits)
      locking/lockdep: Make global debug_locks* variables read-mostly
      locking/lockdep: Fix debug_locks off performance problem
      locking/pvqspinlock: Extend node size when pvqspinlock is configured
      locking/qspinlock_stat: Count instances of nested lock slowpaths
      locking/qspinlock, x86: Provide liveness guarantee
      x86/asm: 'Simplify' GEN_*_RMWcc() macros
      locking/qspinlock: Rework some comments
      locking/qspinlock: Re-order code
      locking/lockdep: Remove duplicated 'lock_class_ops' percpu array
      x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y
      futex: Replace spin_is_locked() with lockdep
      locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y
      x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs
      x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs
      x86/extable: Macrofy inline assembly code to work around GCC inlining bugs
      x86/paravirt: Work around GCC inlining bugs when compiling paravirt ops
      x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs
      x86/alternatives: Macrofy lock prefixes to work around GCC inlining bugs
      x86/refcount: Work around GCC inlining bug
      x86/objtool: Use asm macros to work around GCC inlining bugs
      ...
    0200fbdd
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