[SPARC64]: Add tick_nohz_{stop,restart}_sched_tick() calls to cpu_idle().

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/process.c

@@ -28,6 +28,7 @@
 #include <linux/reboot.h>
 #include <linux/delay.h>
 #include <linux/compat.h>
+#include <linux/tick.h>
 #include <linux/init.h>
 
 #include <asm/oplib.h>
@@ -88,12 +89,14 @@ void cpu_idle(void)
 	set_thread_flag(TIF_POLLING_NRFLAG);
 
 	while(1) {
-		if (need_resched()) {
-			preempt_enable_no_resched();
-			schedule();
-			preempt_disable();
-		}
-		sparc64_yield();
+		tick_nohz_stop_sched_tick();
+		while (!need_resched())
+			sparc64_yield();
+		tick_nohz_restart_sched_tick();
+
+		preempt_enable_no_resched();
+		schedule();
+		preempt_disable();
 	}
 }