diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 881d0c79a6d0b85c3970a9c50538dbe6636e6697..c42d784f03b8f2c2f3603c5472c0deb2395c6c93 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2250,7 +2250,9 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
 				 pgprot_t prot, int node)
 {
 	struct page **pages;
-	unsigned int nr_pages, array_size, i;
+	unsigned int nr_pages;
+	unsigned long array_size;
+	unsigned int i;
 	const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
 	const gfp_t alloc_mask = gfp_mask | __GFP_NOWARN;
 	const gfp_t highmem_mask = (gfp_mask & (GFP_DMA | GFP_DMA32)) ?
@@ -2258,7 +2260,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
 					__GFP_HIGHMEM;
 
 	nr_pages = get_vm_area_size(area) >> PAGE_SHIFT;
-	array_size = (nr_pages * sizeof(struct page *));
+	array_size = (unsigned long)nr_pages * sizeof(struct page *);
 
 	/* Please note that the recursion is strictly bounded. */
 	if (array_size > PAGE_SIZE) {