• Linus Torvalds's avatar
    Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c86ad14d
    Linus Torvalds authored
    Pull locking updates from Ingo Molnar:
     "The locking tree was busier in this cycle than the usual pattern - a
      couple of major projects happened to coincide.
      The main changes are:
       - implement the atomic_fetch_{add,sub,and,or,xor}() API natively
         across all SMP architectures (Peter Zijlstra)
       - add atomic_fetch_{inc/dec}() as well, using the generic primitives
         (Davidlohr Bueso)
       - optimize various aspects of rwsems (Jason Low, Davidlohr Bueso,
         Waiman Long)
       - optimize smp_cond_load_acquire() on arm64 and implement LSE based
         on arm64 (Will Deacon)
       - introduce smp_acquire__after_ctrl_dep() and fix various barrier
         mis-uses and bugs (Peter Zijlstra)
       - after discovering ancient spin_unlock_wait() barrier bugs in its
         implementation and usage, strengthen its semantics and update/fix
         usage sites (Peter Zijlstra)
       - optimize mutex_trylock() fastpath (Peter Zijlstra)
       - ... misc fixes and cleanups"
    * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
      locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
      locking/barriers, arch/arm64: Implement LDXR+WFE based smp_cond_load_acquire()
      locking/static_keys: Fix non static symbol Sparse warning
      locking/qspinlock: Use __this_cpu_dec() instead of full-blown this_cpu_dec()
      locking/atomic, arch/tile: Fix tilepro build
      locking/atomic, arch/m68k: Remove comment
      locking/atomic, arch/arc: Fix build
      locking/Documentation: Clarify limited control-dependency scope
      locking/atomic, arch/rwsem: Employ atomic_long_fetch_add()
      locking/atomic, arch/qrwlock: Employ atomic_fetch_add_acquire()
      locking/atomic, arch/mips: Convert to _relaxed atomics
      locking/atomic, arch/alpha: Convert to _relaxed atomics
      locking/atomic: Remove the deprecated atomic_{set,clear}_mask() functions
      locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
      locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
      locking/atomic: Fix atomic64_relaxed() bits
      locking/atomic, arch/xtensa: Implement atomic_fetch_{add,sub,and,or,xor}()
      locking/atomic, arch/x86: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
      locking/atomic, arch/tile: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
      locking/atomic, arch/sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()
jump_label.c 13.6 KB