sched/fair: Make ilb_notifier an explicit call

No need for an extra notifier.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160310120025.693720241@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index ec2e8d2..16a27b6 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1743,6 +1743,10 @@
 };
 
 #define nohz_flags(cpu)	(&cpu_rq(cpu)->nohz_flags)
+
+extern void nohz_balance_exit_idle(unsigned int cpu);
+#else
+static inline void nohz_balance_exit_idle(unsigned int cpu) { }
 #endif
 
 #ifdef CONFIG_IRQ_TIME_ACCOUNTING