__this_cpu_ptr is being phased out.

Signed-off-by: Christoph Lameter <cl@linux.com>

Index: linux/drivers/md/dm-stats.c
===================================================================
--- linux.orig/drivers/md/dm-stats.c	2014-06-16 15:40:37.491590719 -0500
+++ linux/drivers/md/dm-stats.c	2014-06-16 15:40:37.491590719 -0500
@@ -548,7 +548,7 @@
 		 * A race condition can at worst result in the merged flag being
 		 * misrepresented, so we don't have to disable preemption here.
 		 */
-		last = __this_cpu_ptr(stats->last);
+		last = raw_cpu_ptr(stats->last);
 		stats_aux->merged =
 			(bi_sector == (ACCESS_ONCE(last->last_sector) &&
 				       ((bi_rw & (REQ_WRITE | REQ_DISCARD)) ==