Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (28 commits)
  rcu: Move end of special early-boot RCU operation earlier
  rcu: Changes from reviews: avoid casts, fix/add warnings, improve comments
  rcu: Create rcutree plugins to handle hotplug CPU for multi-level trees
  rcu: Remove lockdep annotations from RCU's _notrace() API members
  rcu: Add #ifdef to suppress __rcu_offline_cpu() warning in !HOTPLUG_CPU builds
  rcu: Add CPU-offline processing for single-node configurations
  rcu: Add "notrace" to RCU function headers used by ftrace
  rcu: Remove CONFIG_PREEMPT_RCU
  rcu: Merge preemptable-RCU functionality into hierarchical RCU
  rcu: Simplify rcu_pending()/rcu_check_callbacks() API
  rcu: Use debugfs_remove_recursive() simplify code.
  rcu: Merge per-RCU-flavor initialization into pre-existing macro
  rcu: Fix online/offline indication for rcudata.csv trace file
  rcu: Consolidate sparse and lockdep declarations in include/linux/rcupdate.h
  rcu: Renamings to increase RCU clarity
  rcu: Move private definitions from include/linux/rcutree.h to kernel/rcutree.h
  rcu: Expunge lingering references to CONFIG_CLASSIC_RCU, optimize on !SMP
  rcu: Delay rcu_barrier() wait until beginning of next CPU-hotunplug operation.
  rcu: Fix typo in rcu_irq_exit() comment header
  rcu: Make rcupreempt_trace.c look at offline CPUs
  ...

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

diff --cc kernel/exit.c
index c98ff7a,263f95e..ae5d866
--- 1/kernel/exit.c
--- 2/kernel/exit.c
+++ b/kernel/exit.c
@@@ -1011,9 -1009,8 +1011,10 @@@ NORET_TYPE void do_exit(long code
        if (tsk->splice_pipe)
                __free_pipe_info(tsk->splice_pipe);
  
 +      validate_creds_for_do_exit(tsk);
 +
        preempt_disable();
+       exit_rcu();
        /* causes final put_task_struct in finish_task_switch(). */
        tsk->state = TASK_DEAD;
        schedule();

diff --cc kernel/fork.c
Simple merge

diff --cc kernel/rcutree.c
Simple merge

diff --cc kernel/sched.c
Simple merge

diff --cc lib/Kconfig.debug
Simple merge