[PATCH tip/core/urgent] v2 rcu: updates for RCU lockdep

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

Hello!

These four patches provides a pair of new APIs and documentation to handle
a couple of cases that David Howells came across when running an NFS
workload under CONFIG_PROVE_RCU, along with some comment improvements
suggested by David and also some by Yong Zhang.

Updated from v1 (http://lkml.org/lkml/2010/4/9/28) to reflect David's
and Eric Dumazet's comments:

o	Remove (void*) cast from rcu_access_pointer().

o	Merge identical definitions of rcu_access_pointer() outside
	of #ifdef.

o	Merge comment syntax-error fix into comment patch.

							Thanx, Paul

 b/Documentation/RCU/NMI-RCU.txt   |   39 +++++++++++++++++++++-----------------
 b/Documentation/RCU/checklist.txt |    7 +++---
 b/Documentation/RCU/lockdep.txt   |   28 +++++++++++++++++++++++++--
 b/Documentation/RCU/whatisRCU.txt |    6 +++++
 b/include/linux/rcupdate.h        |   32 +++++++++++++++++++++++++++++++
 include/linux/rcupdate.h          |   28 ++++++++++++++++++++++-----
 6 files changed, 113 insertions(+), 27 deletions(-)