[PATCH tip/core/rcu 0/15] General fixes

[Paul E. McKenney]

Hello!

This series contains general fixes:

1.	Make cond_resched() provide RCU quiescent state, which finally
	avoids degrading performance.

2.	Use timer as backstop for NOCB deferred wakeups.

3.	Simplify RCU Kconfig by driving TASKS_RCU directly off of PREEMPT.

4.	Create reasonable API for do_exit() TASKS_RCU processing.

5.	Add TPS() to event-traced strings.

6.	Move rcu.h to new trivial-function style.

7.	Add event tracing to ->gp_tasks update at GP start.

8.	Add idle swait variants which don't contribute to load average,
	courtesy of Luis R. Rodriguez.

9.	Use idle versions of swait to make idle-hack clear, courtesy of
	Luis R. Rodriguez.

10.	Add TPS() protection for _rcu_barrier_trace strings.

11.	Set disable_rcu_irq_enter on rcu_eqs_exit(), courtesy of
	Masami Hiramatsu.

12.	Add assertions verifying blocked-tasks list.

13.	Make rcu_idle_enter() rely on callers disabling irqs, courtesy
	of Peter Zijlstra.

14.	Add warning to rcu_idle_enter() for irqs enabled.

15.	Remove exports from rcu_idle_exit() and rcu_idle_enter().

							Thanx, Paul

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

 include/linux/rcupdate.h                                    |   13 
 include/linux/sched.h                                       |    8 
 include/linux/swait.h                                       |   55 +++
 kernel/exit.c                                               |    7 
 kernel/rcu/Kconfig                                          |    3 
 kernel/rcu/rcu.h                                            |  128 +------
 kernel/rcu/rcutorture.c                                     |   17 
 kernel/rcu/tree.c                                           |   75 +---
 kernel/rcu/tree.h                                           |    2 
 kernel/rcu/tree_plugin.h                                    |  211 +++++++-----
 kernel/rcu/update.c                                         |   18 -
 kernel/sched/core.c                                         |    1 
 tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt |    2 
 13 files changed, 276 insertions(+), 264 deletions(-)