[PATCH tip/core/rcu 0/7] CPU hotplug changes for 3.8

["Paul E. McKenney" <paulmck@linux.vnet.ibm.com>]

Hello!

This patch series provides further updates to RCU's interaction with
CPU hotplug.  The individual patches are as follows:

1.	Fix an obsolete comment describing ->onofflock.
2.	Make rcutorture print the errno from cpu_down() failure if
	the "verbose" module parameter is specified.
3.	Make _cpu_down() use stop_cpus() instead of __stop_machine().
4.	Rename ->onofflock to ->orphan_lock to correctly indicate this
	lock's current scope.
5.	Avoid counter wrap in synchronize_sched_expedited().
6.	Move synchronize_sched_expedited() from global variables to
	the rcu_state structure.
7.	Instrument synchronize_rcu_expedited() for debugfs tracing.

							Thanx, Paul

 b/kernel/cpu.c            |    9 ++-
 b/kernel/rcutorture.c     |    9 +++
 b/kernel/rcutree.c        |    4 -
 b/kernel/rcutree.h        |    7 +-
 b/kernel/rcutree_plugin.h |    3 -
 kernel/rcutree.c          |  112 ++++++++++++++++++++++++++++++----------------
 kernel/rcutree.h          |   12 ++++
 7 files changed, 108 insertions(+), 48 deletions(-)