tree 22b66fc8ac9b95586866ddb447dcc8712d441c14
parent 67afeed2cab0e59712b4ebf1aef9a2e555a188ce
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1351025221 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1352844503 -0800

rcu: Clarify memory-ordering properties of grace-period primitives

This commit explicitly states the memory-ordering properties of the
RCU grace-period primitives.  Although these properties were in some
sense implied by the fundmental property of RCU ("a grace period must
wait for all pre-existing RCU read-side critical sections to complete"),
stating it explicitly will be a great labor-saving device.

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>