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-rw-r--r--mm/page_alloc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6847177dc4a1..2ec9cc407216 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5813,8 +5813,10 @@ 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;