Miscellaneous fixes for v4.15

Hello!

This series contains the following miscellaneous fixes:

1. Provide GP ordering in face of migrations and delays.

2. Fix up pending cbs check in rcu_prepare_for_idle(), courtesy
of Neeraj Upadhyay.

3. Create call_rcu_tasks() kthread at boot time.

4. Map irq_work_on_queue() to irq_work_on() in !SMP.

5. Add parameters to SRCU docbook comments.

6. Make resched_cpu() unconditional.

7. Pretend ->boost_mtx acquired legitimately for lockdep's benefit.

8. Add extended-quiescent-state testing advice.

9. Include rcupdate.h into kernel/rcu/segcblist, courtesy of
Sebastian Andrzej Siewior.

Thanx, Paul

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

 include/linux/irq_work.h   |    3 ---
 include/linux/srcu.h       |    1 +
 kernel/irq_work.c          |    9 ++++++---
 kernel/rcu/rcu_segcblist.c |    1 +
 kernel/rcu/srcutree.c      |    2 +-
 kernel/rcu/tree.c          |   30 ++++++++++++++++++++++++++++++
 kernel/rcu/tree_plugin.h   |    7 +++++--
 kernel/rcu/update.c        |   34 +++++++++++++++-------------------
 kernel/sched/core.c        |    3 +--
 9 files changed, 60 insertions(+), 30 deletions(-)