tree cf4e3fd454f120fdb54ab52ba377c8bd2a96ecf3
parent 0e2951b8749fac838fd64a4ae0f0162ac33f9356
author Paul E. McKenney <paul.mckenney@linaro.org> 1356949461 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1360252190 -0800

rcu: Make rcu_accelerate_cbs() note need for future grace periods

Now that rcu_start_future_gp() has been abstracted from
rcu_nocb_wait_gp(), rcu_accelerate_cbs() can invoke rcu_start_future_gp()
so as to register the need for any future grace periods needed by a
CPU about to enter dyntick-idle mode.  This commit makes this change.
Note that some refactoring of rcu_start_gp() is carried out to avoid
recursion and subsequent self-deadlocks.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>