diff --git a/mm/kmsan/init.c b/mm/kmsan/init.c
index ca79636f858e..6c56dca46063 100644
--- a/mm/kmsan/init.c
+++ b/mm/kmsan/init.c
@@ -72,7 +72,7 @@ static void __init kmsan_record_future_shadow_range(void *start, void *end)
  */
 void __init kmsan_init_shadow(void)
 {
-	const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
+	const size_t nd_size = sizeof(pg_data_t);
 	phys_addr_t p_start, p_end;
 	u64 loop;
 	int nid;