tree d76138b1443740c2aea593331c0898fe6c99a124
parent b5b393601dbce0bce3f0717f29e6c8d1cf0295da
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1360008864 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1363122457 -0700

rcu: Avoid invoking RCU core on offline CPUs

Offline CPUs transition through the scheduler to the idle loop one
last time before being shut down.  This can result in RCU raising
softirq on this CPU, which is at best useless given that the CPU's
callbacks will be offloaded at CPU_DEAD time.  This commit therefore
avoids raising softirq on offline CPUs.

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