[PATCH tip/core/rcu 0/20] Miscellaneous fixes for 4.11

[Paul E. McKenney]

Hello!

This series provides miscellaneous fixes:

1.	Make RCU_EXPEDITE_BOOT be the default in order to speed up
	boot, courtesy of Sebastian Andrzej Siewior.

2.	Make RCU suspicious-access lockdep splats use pr_err().

3.	Disable sys_membarrier when nohz_full is enabled, courtesy
	of Mathieu Desnoyers.

4.	Only dump stalled-tasks stacks if there was a real stall, courtesy
	of Byungchul Park.

5.	Remove unneeded rcu_process_callbacks() declarations.

6.	Remove unused but set "mask" variable, courtesy of Tobias Klauser.

7.	Remove short-term CPU kicking.

8.	Add long-term CPU kicking.

9.	Once again use NMI-based stack traces in stall warnings.

10.	Add functions to test for trivial grace periods.

11.	Make cond_resched() provide RCU quiescent state, which will
	hopefully lead to the removal of cond_resched_rcu_qs().

12.	Re-enable TASKS_RCU for User Mode Linux.

13.	Don't wake rcuc/X kthreads on NOCB CPUs.

14.	Add comment headers to expedited-grace-period counter functions.

15.	Make rcu_cpu_starting() use its "cpu" argument.

16.	Enable RCU tracepoints by default to aid in debugging, courtesy
	of Matt Fleming.

17.	Fix comment in rcu_organize_nocb_kthreads(), which no longer
	spawns kthreads.

18.	Clarify comments about when llist locking is needed, courtesy
	of Joel Fernandes.

19.	Eliminate unused expedited_normal counter.

20.	Add lockdep checks to synchronous expedited primitives.

							Thanx, Paul

------------------------------------------------------------------------

 Documentation/RCU/trace.txt |    5 ---
 include/linux/llist.h       |   37 +++++++++++++++-----------
 include/linux/rcupdate.h    |    8 +++++
 include/linux/rcutiny.h     |   10 +++++++
 include/linux/rcutree.h     |    2 +
 include/linux/sched.h       |    3 +-
 init/Kconfig                |   14 ----------
 kernel/locking/lockdep.c    |   12 ++++----
 kernel/membarrier.c         |    4 ++
 kernel/rcu/tiny.c           |    2 -
 kernel/rcu/tree.c           |   61 +++++++++++++++++++++++++++++++-------------
 kernel/rcu/tree.h           |    1 
 kernel/rcu/tree_exp.h       |   28 +++++++++++++++++++-
 kernel/rcu/tree_plugin.h    |   16 ++++++++++-
 kernel/rcu/tree_trace.c     |    3 --
 kernel/rcu/update.c         |    6 +---
 kernel/sched/core.c         |    1 
 lib/Kconfig.debug           |    1 
 18 files changed, 143 insertions(+), 71 deletions(-)