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[PATCH tip/core/rcu 0/12] CPU-hotplug updates

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Hello!

This series updates RCU's interaction with CPU hotplug, perhaps most
notably making callback migration happen very shortly after the outgoing
CPU is gone.

1.	Make expedited GPs correctly handle hardware CPU insertion.

2.	Migrate callbacks earlier in the CPU-offline timeline.

3.	Fix typo suppressing CPU-hotplug statistics.

4.	Remove orphan/adopt event-tracing fields.

5.	Check for NOCB CPUs and empty lists earlier in CB migration.

6.	Make NOCB CPUs migrate CBs directly from outgoing CPU.

7.	Advance outgoing CPU's callbacks before migrating them.

8.	Eliminate rcu_state ->orphan_lock.

9.	Advance callbacks after migration.

10.	Localize rcu_state ->orphan_pend and ->orphan_done.

11.	Remove unused RCU list functions.

12.	Move callback-list warning to irq-disable region, thus suppressing
	rare but real false-positive dmesg splats.

							Thanx, Paul

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

 include/linux/rcupdate.h   |    1 
 kernel/cpu.c               |    1 
 kernel/rcu/rcu_segcblist.c |  108 +++-----------
 kernel/rcu/rcu_segcblist.h |   28 ---
 kernel/rcu/tree.c          |  342 +++++++++++++++++++--------------------------
 kernel/rcu/tree.h          |   13 -
 kernel/rcu/tree_exp.h      |    2 
 kernel/rcu/tree_plugin.h   |   31 +---
 kernel/torture.c           |    2 
 9 files changed, 189 insertions(+), 339 deletions(-)

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[PATCH tip/core/rcu 0/12] CPU-hotplug updates "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
  [PATCH tip/core/rcu 08/12] rcu: Eliminate rcu_state ->orphan_lock "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
  [PATCH tip/core/rcu 11/12] rcu: Remove unused RCU list functions "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
  [PATCH tip/core/rcu 07/12] rcu: Advance outgoing CPU's callbacks before migrating them "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
  [PATCH tip/core/rcu 10/12] rcu: Localize rcu_state ->orphan_pend and ->orphan_done "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
  [PATCH tip/core/rcu 04/12] rcu: Remove orphan/adopt event-tracing fields "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200

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