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    Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 94d18ee9
    Linus Torvalds authored
    Pull RCU updates from Ingo Molnar:
     "This cycle's RCU changes were:
    
       - A few more RCU flavor consolidation cleanups.
    
       - Updates to RCU's list-traversal macros improving lockdep usability.
    
       - Forward-progress improvements for no-CBs CPUs: Avoid ignoring
         incoming callbacks during grace-period waits.
    
       - Forward-progress improvements for no-CBs CPUs: Use ->cblist
         structure to take advantage of others' grace periods.
    
       - Also added a small commit that avoids needlessly inflicting
         scheduler-clock ticks on callback-offloaded CPUs.
    
       - Forward-progress improvements for no-CBs CPUs: Reduce contention on
         ->nocb_lock guarding ->cblist.
    
       - Forward-progress improvements for no-CBs CPUs: Add ->nocb_bypass
         list to further reduce contention on ->nocb_lock guarding ->cblist.
    
       - Miscellaneous fixes.
    
       - Torture-test updates.
    
       - minor LKMM updates"
    
    * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (86 commits)
      MAINTAINERS: Update from paulmck@linux.ibm.com to paulmck@kernel.org
      rcu: Don't include <linux/ktime.h> in rcutiny.h
      rcu: Allow rcu_do_batch() to dynamically adjust batch sizes
      rcu/nocb: Don't wake no-CBs GP kthread if timer posted under overload
      rcu/nocb: Reduce __call_rcu_nocb_wake() leaf rcu_node ->lock contention
      rcu/nocb: Reduce nocb_cb_wait() leaf rcu_node ->lock contention
      rcu/nocb: Advance CBs after merge in rcutree_migrate_callbacks()
      rcu/nocb: Avoid synchronous wakeup in __call_rcu_nocb_wake()
      rcu/nocb: Print no-CBs diagnostics when rcutorture writer unduly delayed
      rcu/nocb: EXP Check use and usefulness of ->nocb_lock_contended
      rcu/nocb: Add bypass callback queueing
      rcu/nocb: Atomic ->len field in rcu_segcblist structure
      rcu/nocb: Unconditionally advance and wake for excessive CBs
      rcu/nocb: Reduce ->nocb_lock contention with separate ->nocb_gp_lock
      rcu/nocb: Reduce contention at no-CBs invocation-done time
      rcu/nocb: Reduce contention at no-CBs registry-time CB advancement
      rcu/nocb: Round down for number of no-CBs grace-period kthreads
      rcu/nocb: Avoid ->nocb_lock capture by corresponding CPU
      rcu/nocb: Avoid needless wakeups of no-CBs grace-period kthread
      rcu/nocb: Make __call_rcu_nocb_wake() safe for many callbacks
      ...
    94d18ee9