1 files changed, 3 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 48aee0f5902f..a6f7576aecae 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4515,6 +4515,9 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
 {
         pg_data_t *pgdat = NODE_DATA(nid);
 
+        /* pg_data_t should be reset to zero when it's allocated */
+        WARN_ON(pgdat->nr_zones || pgdat->node_start_pfn || pgdat->classzone_idx);
+
         pgdat->node_id = nid;
         pgdat->node_start_pfn = node_start_pfn;
         calculate_node_totalpages(pgdat, zones_size, zholes_size);