tree dcab84e913044084d0ba1ec4a58385da288deb16
parent 98834b83785e1388fa8672cf4f8de09974d15e86
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1467314171 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1471883442 -0700

rcu: Use RCU's online-CPU state for expedited IPI retry

This commit improves the accuracy of the interaction between CPU hotplug
operations and RCU's expedited grace periods by using RCU's online-CPU
state to determine when failed IPIs should be retried.

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