[GIT PULL rcu/urgent] Fixes for 3.16

[Paul E. McKenney]

Hello, Ingo,

This series includes the following:

1.	Export a pair of debug-object interfaces for RCU that will
	allow the slab allocators to avoid a recursion bug located
	by Sasha Levin.  Strictly speaking, this is not a regression,
	but it would be good to enable the fix.

2.	Address a serious performance regression on an open/close
	micro-benchmark located by Dave Hansen.  The offending commit
	is ac1bea85781e (Make cond_resched() report RCU quiescent states).

Both have been exposed to -next testing, and are available in the git
repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git urgent.2014.06.23a

for you to fetch changes up to 4a81e8328d3791a4f99bf5b436d050f6dc5ffea3:

  rcu: Reduce overhead of cond_resched() checks for RCU (2014-06-23 11:19:32 -0700)

----------------------------------------------------------------
Paul E. McKenney (2):
      rcu: Export debug_init_rcu_head() and and debug_init_rcu_head()
      rcu: Reduce overhead of cond_resched() checks for RCU

 Documentation/kernel-parameters.txt |   6 ++
 include/linux/rcupdate.h            |  46 +++---------
 kernel/rcu/tree.c                   | 140 ++++++++++++++++++++++++++++--------
 kernel/rcu/tree.h                   |   6 +-
 kernel/rcu/tree_plugin.h            |   2 +-
 kernel/rcu/update.c                 |  22 +-----
 kernel/sched/core.c                 |   7 +-
 7 files changed, 137 insertions(+), 92 deletions(-)

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