time: Replace __get_cpu_var uses

Convert uses of __get_cpu_var for creating a address from a percpu
offset to this_cpu_ptr.

The two cases where get_cpu_var is used to actually access a percpu
variable are changed to use this_cpu_read/raw_cpu_read.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/clocksource/dummy_timer.c b/drivers/clocksource/dummy_timer.c
index ad35725..3199060 100644
--- a/drivers/clocksource/dummy_timer.c
+++ b/drivers/clocksource/dummy_timer.c
@@ -28,7 +28,7 @@
 static void dummy_timer_setup(void)
 {
 	int cpu = smp_processor_id();
-	struct clock_event_device *evt = __this_cpu_ptr(&dummy_timer_evt);
+	struct clock_event_device *evt = raw_cpu_ptr(&dummy_timer_evt);
 
 	evt->name	= "dummy_timer";
 	evt->features	= CLOCK_EVT_FEAT_PERIODIC |