fixup! rcu: Define rcu_irq_{enter,exit}() in terms of rcu_nmi_{enter,exit}()

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index bf594be..e2e9b1f 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -266,6 +266,7 @@ void rcu_bh_qs(void)
 
 static DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks) = {
 	.dynticks_nesting = 1,
+	.dynticks_nmi_nesting = DYNTICK_IRQ_NONIDLE,
 	.dynticks = ATOMIC_INIT(RCU_DYNTICK_CTRL_CTR),
 };