1 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 9f274a687c7e..451eaa13bc28 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -637,9 +637,10 @@ static inline int is_normal_idx(enum zone_type idx)
 static inline int is_highmem(struct zone *zone)
 {
 #ifdef CONFIG_HIGHMEM
-        int zone_idx = zone - zone->zone_pgdat->node_zones;
-        return zone_idx == ZONE_HIGHMEM ||
-                (zone_idx == ZONE_MOVABLE && zone_movable_is_highmem());
+        int zone_off = (char *)zone - (char *)zone->zone_pgdat->node_zones;
+        return zone_off == ZONE_HIGHMEM * sizeof(*zone) ||
+               (zone_off == ZONE_MOVABLE * sizeof(*zone) &&
+                zone_movable_is_highmem());
 #else
         return 0;
 #endif