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
index 0628df1559700e2efea2f92a68da8281b0c5131d,0628df1559700e2efea2f92a68da8281b0c5131d,7b9dd4f62569557653823363fafde1b6973223dc,d198a33d54bdc6f9d1becf720b45059570a09295,991fa5c5dc5e3e04353a6d74599383c91e814cec,0628df1559700e2efea2f92a68da8281b0c5131d,0628df1559700e2efea2f92a68da8281b0c5131d..add042926a6608258564c72ea5a33dd204428df6
--- 1/kernel/rcu/tree.c
--- 2/kernel/rcu/tree.c
--- 3/kernel/rcu/tree.c
--- 4/kernel/rcu/tree.c
--- 5/kernel/rcu/tree.c
--- 6/kernel/rcu/tree.c
--- 7/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@@@@@@@ -110,11 -110,11 -110,12 -110,11 -110,17 -110,11 -110,11 +110,18 @@@@@@@@ struct rcu_state sname##_state = { 
       RCU_STATE_INITIALIZER(rcu_sched, 's', call_rcu_sched);
       RCU_STATE_INITIALIZER(rcu_bh, 'b', call_rcu_bh);
       
-- ----static struct rcu_state *rcu_state_p;
++ ++++static struct rcu_state *const rcu_state_p;
++ ++++static struct rcu_data __percpu *const rcu_data_p;
       LIST_HEAD(rcu_struct_flavors);
       
---- --/* Increase (but not decrease) the CONFIG_RCU_FANOUT_LEAF at boot time. */
---- --static int rcu_fanout_leaf = CONFIG_RCU_FANOUT_LEAF;
++++ ++/* Dump rcu_node combining tree at boot to verify correct setup. */
++++ ++static bool dump_tree;
++++ ++module_param(dump_tree, bool, 0444);
++++ ++/* Control rcu_node-tree auto-balancing at boot time. */
++++ ++static bool rcu_fanout_exact;
++++ ++module_param(rcu_fanout_exact, bool, 0444);
++++ ++/* Increase (but not decrease) the RCU_FANOUT_LEAF at boot time. */
++++ ++static int rcu_fanout_leaf = RCU_FANOUT_LEAF;
       module_param(rcu_fanout_leaf, int, 0444);
       int rcu_num_lvls __read_mostly = RCU_NUM_LVLS;
       static int num_rcu_lvl[] = {  /* Number of rcu_nodes at specified level. */

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

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