tree f4e43a84e2a4ed78241d90c25cb339b01b90b88c
parent ee968ac61d5a3440b931375d81113e0eedfcb249
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1439675390 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1444155018 -0700

rcu: Add online/offline info to stall warning message

This commit makes the RCU CPU stall warning message print online/offline
indications immediately after a hyphen following the CPU number.  A "O"
indicates that the global CPU-hotplug system believes that the CPU is
online, a "o" that RCU perceived the CPU to be online at the beginning
of the current expedited grace period, and an "N" that RCU currently
believes that it will perceive the CPU as being online at the beginning
of the next expedited grace period, with "." otherwise for all three
indications.  So for CPU 10, you would normally see "10-OoN:" indicating
that everything believes that the CPU is online.

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