[PATCH tip/core/rcu 0/4] Additional RCU commits for 3.4

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

Hello!

This series contains an additional four commits for 3.4.  They are all
small fixes.  This series is in addition to the set posted earlier at
https://lkml.org/lkml/2012/2/3/459, and there is some possibility that
the direct-drive SRCU at https://lkml.org/lkml/2012/2/12/117 will also
make it.  The four new patches are as follows:

1.	Fix RCU_FAST_NO_HZ to avoid continually retrying dyntick-idle
	entry if softirqs are pending.
2.	Fix RCU_FAST_NO_HZ to avoid retrying dyntick-idle entry when
	idle is re-entered after a timer was posted.  For both #1 and
	#2, the philosophy is that it is better to take a scheduling-clock
	interrupt than to burn lots of CPU in a futile attempt to process
	RCU callbacks.
3.	Eliminate spurious warnings from synchronize_sched_expedited(),
	courtesy of Hugh Dickens.
4.	Apply several fixes to rcutorture based on initial inspection.

For a testing-only version of this patchset from git, please see the
following subject-to-rebase branch:

git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next

							Thanx, Paul

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

 b/kernel/rcutorture.c     |   19 ++++++++++++++++---
 b/kernel/rcutree.c        |    2 +-
 b/kernel/rcutree_plugin.h |    3 ++-
 kernel/rcutree.c          |    2 +-
 kernel/rcutree_plugin.h   |    2 +-
 5 files changed, 21 insertions(+), 7 deletions(-)