Replace the use of __get_cpu_var for address calculation with
this_cpu_ptr().

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

Index: linux/drivers/staging/zsmalloc/zsmalloc-main.c
===================================================================
--- linux.orig/drivers/staging/zsmalloc/zsmalloc-main.c	2013-12-02 16:07:49.564639939 -0600
+++ linux/drivers/staging/zsmalloc/zsmalloc-main.c	2013-12-02 16:07:49.554640215 -0600
@@ -1003,7 +1003,7 @@ void *zs_map_object(struct zs_pool *pool
 	class = &pool->size_class[class_idx];
 	off = obj_idx_to_offset(page, obj_idx, class->size);
 
-	area = &get_cpu_var(zs_map_area);
+	area = this_cpu_ptr(&zs_map_area);
 	area->vm_mm = mm;
 	if (off + class->size <= PAGE_SIZE) {
 		/* this object is contained entirely within a page */
@@ -1037,7 +1037,7 @@ void zs_unmap_object(struct zs_pool *poo
 	class = &pool->size_class[class_idx];
 	off = obj_idx_to_offset(page, obj_idx, class->size);
 
-	area = &__get_cpu_var(zs_map_area);
+	area = this_cpu_ptr(&zs_map_area);
 	if (off + class->size <= PAGE_SIZE)
 		kunmap_atomic(area->vm_addr);
 	else {