Merge branches 'array.2015.05.27a', 'doc.2015.05.27a', 'fixes.2015.05.27a', 'hotplug...

array.2015.05.27a:  Remove all uses of RCU-protected array indexes.
doc.2015.05.27a:  Docuemntation updates.
fixes.2015.05.27a:  Miscellaneous fixes.
hotplug.2015.05.27a:  CPU-hotplug updates.
init.2015.05.27a:  Initialization/Kconfig updates.
tiny.2015.05.27a:  Updates to Tiny RCU.
torture.2015.05.27a:  Torture-testing updates.

diff --cc Documentation/RCU/rcu_dereference.txt
Simple merge

diff --cc Documentation/RCU/whatisRCU.txt
Simple merge

diff --cc Documentation/kernel-parameters.txt
Simple merge

diff --cc Documentation/memory-barriers.txt
Simple merge

diff --cc include/linux/rcupdate.h
Simple merge

diff --cc include/linux/rcutree.h
Simple merge

diff --cc kernel/rcu/tree.c
Simple merge

diff --cc kernel/rcu/tree.h
Simple merge

diff --cc kernel/rcu/tree_plugin.h
Simple merge