diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 2a39cf1..6e45b0f 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -547,6 +547,7 @@
  *	@gfp_mask:	flags for the page level allocator
  *	@prot:		protection mask for the allocated pages
  *	@node:		node to use for allocation or -1
+ *	@caller:	caller's return address
  *
  *	Allocate enough pages to cover @size from the page level
  *	allocator with @gfp_mask flags.  Map them into contiguous