Pull RCU updates from Paul E. McKenney:
	* Update RCU documentation.  These were posted to LKML at
	  https://lkml.org/lkml/2014/2/17/555.
	* Miscellaneous fixes.  These were posted to LKML at
	  https://lkml.org/lkml/2014/2/17/530.  Note that two of these
	  are RCU changes to other maintainer's trees: 
add1f0995454
	  (fs) and 
8857563b819b (notifer), both of which substitute
	  rcu_access_pointer() for rcu_dereference_raw().
	* Real-time latency fixes.  These were posted to LKML at
	  https://lkml.org/lkml/2014/2/17/544.
	* Torture-test changes, including refactoring of rcutorture
	  and introduction of a vestigial locktorture.  These were posted
	  to LKML at https://lkml.org/lkml/2014/2/17/599.
Signed-off-by: Ingo Molnar <mingo@kernel.org>