• Linus Torvalds's avatar
    Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4b9fd8a8
    Linus Torvalds authored
    Pull locking updates from Ingo Molnar:
     "The main changes in this cycle were:
    
       - Continued user-access cleanups in the futex code.
    
       - percpu-rwsem rewrite that uses its own waitqueue and atomic_t
         instead of an embedded rwsem. This addresses a couple of
         weaknesses, but the primary motivation was complications on the -rt
         kernel.
    
       - Introduce raw lock nesting detection on lockdep
         (CONFIG_PROVE_RAW_LOCK_NESTING=y), document the raw_lock vs. normal
         lock differences. This too originates from -rt.
    
       - Reuse lockdep zapped chain_hlocks entries, to conserve RAM
         footprint on distro-ish kernels running into the "BUG:
         MAX_LOCKDEP_CHAIN_HLOCKS too low!" depletion of the lockdep
         chain-entries pool.
    
       - Misc cleanups, smaller fixes and enhancements - see the changelog
         for details"
    
    * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
      fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t
      thermal/x86_pkg_temp: Make pkg_temp_lock a raw_spinlock_t
      Documentation/locking/locktypes: Minor copy editor fixes
      Documentation/locking/locktypes: Further clarifications and wordsmithing
      m68knommu: Remove mm.h include from uaccess_no.h
      x86: get rid of user_atomic_cmpxchg_inatomic()
      generic arch_futex_atomic_op_inuser() doesn't need access_ok()
      x86: don't reload after cmpxchg in unsafe_atomic_op2() loop
      x86: convert arch_futex_atomic_op_inuser() to user_access_begin/user_access_end()
      objtool: whitelist __sanitizer_cov_trace_switch()
      [parisc, s390, sparc64] no need for access_ok() in futex handling
      sh: no need of access_ok() in arch_futex_atomic_op_inuser()
      futex: arch_futex_atomic_op_inuser() calling conventions change
      completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()
      lockdep: Add posixtimer context tracing bits
      lockdep: Annotate irq_work
      lockdep: Add hrtimer context tracing bits
      lockdep: Introduce wait-type checks
      completion: Use simple wait queues
      sched/swait: Prepare usage in completions
      ...
    4b9fd8a8
exit.c 42.2 KB