[PATCH v3 tip/core/rcu 0/18] Miscellaneous fixes for 4.11

[Paul E. McKenney]

Hello!

This series provides v3 of 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.	Add long-term CPU kicking.

8.	Remove short-term CPU kicking.

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

10.	Re-enable TASKS_RCU for User Mode Linux.

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

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

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

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

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

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

17.	Eliminate unused expedited_normal counter.

18.	Add lockdep checks to synchronous expedited primitives.

Changes since v2:

o	Fixed lockdep message as noted by Josh Triplett.

Changes since v1:

o	Reverse the order of patches 7 and 8.

o	Defer the patch adding tests for trivial grace periods.

o	Defer the patch making cond_resched() provide RCU quiescent
	states.

o	Apply other feedback from Josh Triplett, Peter Zijlstra, and
	Michal Hocko.

							Thanx, Paul

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

 Documentation/RCU/trace.txt |    5 +----
 include/linux/llist.h       |   37 +++++++++++++++++++++----------------
 init/Kconfig                |   14 --------------
 kernel/locking/lockdep.c    |   12 ++++++------
 kernel/membarrier.c         |    4 ++++
 kernel/rcu/tiny.c           |    2 --
 kernel/rcu/tree.c           |   35 ++++++++++++++++++-----------------
 kernel/rcu/tree.h           |    1 -
 kernel/rcu/tree_exp.h       |   28 +++++++++++++++++++++++++++-
 kernel/rcu/tree_plugin.h    |    5 +++--
 kernel/rcu/tree_trace.c     |    3 +--
 kernel/rcu/update.c         |    6 ++----
 lib/Kconfig.debug           |    1 +
 13 files changed, 84 insertions(+), 69 deletions(-)