Hello!

This series provides some RCU Tasks updates:

1.	rcu-tasks: Use accurate runstart time for RCU Tasks boot-time
	testing, courtesy of Zqiang.

2.	rcu-tasks: Improve comments explaining tasks_rcu_exit_srcu
	purpose, courtesy of Frederic Weisbecker.

3.	rcu-tasks: Remove preemption disablement around
	srcu_read_[un]lock() calls, courtesy of Frederic Weisbecker.

4.	rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes(),
	courtesy of Frederic Weisbecker.

5.	rcu-tasks: Make rude RCU-Tasks work well with CPU hotplug,
	courtesy of Zqiang.

6.	rcu-tasks: Handle queue-shrink/callback-enqueue race condition,
	courtesy of Zqiang.

						Thanx, Paul

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

 b/include/linux/rcupdate.h |    2 +
 b/kernel/pid_namespace.c   |   17 +++++++++
 b/kernel/rcu/tasks.h       |    8 +---
 kernel/rcu/tasks.h         |   77 ++++++++++++++++++++++++++++++---------------
 4 files changed, 75 insertions(+), 29 deletions(-)