tree 716acd208cb0633cdd19fc0cd5ad601906cceb24
parent b402b73b3afe3614bc0e921ebe18013ea103115a
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1340409986 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1348411314 -0700

rcu: Move quiescent-state forcing into kthread

As the first step towards allowing quiescent-state forcing to be
preemptible, this commit moves RCU quiescent-state forcing into the
same kthread that is now used to initialize and clean up after grace
periods.  This is yet another step towards keeping scheduling
latency down to a dull roar.

Updated to change from raw_spin_lock_irqsave() to raw_spin_lock_irq()
and to remove the now-unused rcu_state structure fields as suggested by
Peter Zijlstra.

Reported-by: Mike Galbraith <mgalbraith@suse.de>
Reported-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>