rcu: Nocb (de)activate through sysfs

Not for merge.

Make nocb toggable for a given CPU using:
	/sys/devices/system/cpu/cpu*/hotplug/nocb

This is only intended for those who want to test this patchset. The real
interfaces will be cpuset/isolation and rcutorture.

Not-Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
1 file changed