mm/page_alloc.c: fix calculation of pgdat->nr_zones

[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6be91a1a00d9f7cb738b6004745e4a447124bbf9..a2f365f4043365cea2061a99a4805df7b211e658 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5544,8 +5544,10 @@ void __meminit init_currently_empty_zone(struct zone *zone,
                                        unsigned long size)
 {
        struct pglist_data *pgdat = zone->zone_pgdat;
+       int zone_idx = zone_idx(zone) + 1;
 
-       pgdat->nr_zones = zone_idx(zone) + 1;
+       if (zone_idx > pgdat->nr_zones)
+               pgdat->nr_zones = zone_idx;
 
        zone->zone_start_pfn = zone_start_pfn;