diff --git a/mm/memory.c b/mm/memory.c
index 30975ef..c256175 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1458,7 +1458,7 @@
  * unmap_mapping_range - unmap the portion of all mmaps
  * in the specified address_space corresponding to the specified
  * page range in the underlying file.
- * @address_space: the address space containing mmaps to be unmapped.
+ * @mapping: the address space containing mmaps to be unmapped.
  * @holebegin: byte in first page to unmap, relative to the start of
  * the underlying file.  This will be rounded down to a PAGE_SIZE
  * boundary.  Note that this is different from vmtruncate(), which