[PATCH] rcutorture: add call_rcu_bh() operations

Add operations for the call_rcu_bh() variant of RCU.  Also add an
rcu_batches_completed_bh() function, which is needed by rcutorture.

Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

diff --cc kernel/rcupdate.c
Simple merge

diff --cc kernel/rcutorture.c
Simple merge