mm/hugetlb.c: use first_memory_node

Instead of open-coding it.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0adb74d..0f580ea 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2684,8 +2684,8 @@
 	for (i = 0; i < MAX_NUMNODES; ++i)
 		INIT_LIST_HEAD(&h->hugepage_freelists[i]);
 	INIT_LIST_HEAD(&h->hugepage_activelist);
-	h->next_nid_to_alloc = first_node(node_states[N_MEMORY]);
-	h->next_nid_to_free = first_node(node_states[N_MEMORY]);
+	h->next_nid_to_alloc = first_memory_node;
+	h->next_nid_to_free = first_memory_node;
 	snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB",
 					huge_page_size(h)/1024);