make __vmalloc_area_node() static

__vmalloc_area_node() can become static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 83625b6..4efc41a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -463,8 +463,8 @@
 }
 EXPORT_SYMBOL(vmap);
 
-void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
-				pgprot_t prot, int node)
+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;