diff --git a/[refs] b/[refs]
index fcd570fb1796..b9978e61c16d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 52f37629fd3c7b24e1e6c125e665454cd7ac1acb
+refs/heads/master: c73e5c9c59a0f7ba30b3e5f7bd2d8097d4c89c6d
diff --git a/trunk/mm/migrate.c b/trunk/mm/migrate.c
index c87ef9207853..27ed22579fd9 100644
--- a/trunk/mm/migrate.c
+++ b/trunk/mm/migrate.c
@@ -973,19 +973,23 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 }
 
 /*
- * migrate_pages
+ * migrate_pages - migrate the pages specified in a list, to the free pages
+ *		   supplied as the target for the page migration
  *
- * The function takes one list of pages to migrate and a function
- * that determines from the page to be migrated and the private data
- * the target of the move and allocates the page.
+ * @from:		The list of pages to be migrated.
+ * @get_new_page:	The function used to allocate free pages to be used
+ *			as the target of the page migration.
+ * @private:		Private data to be passed on to get_new_page()
+ * @mode:		The migration mode that specifies the constraints for
+ *			page migration, if any.
+ * @reason:		The reason for page migration.
  *
- * The function returns after 10 attempts or if no pages
- * are movable anymore because to has become empty
- * or no retryable pages exist anymore.
- * Caller should call putback_lru_pages to return pages to the LRU
+ * The function returns after 10 attempts or if no pages are movable any more
+ * because the list has become empty or no retryable pages exist any more.
+ * The caller should call putback_lru_pages() to return pages to the LRU
  * or free list only if ret != 0.
  *
- * Return: Number of pages not migrated or error code.
+ * Returns the number of pages that were not migrated, or an error code.
  */
 int migrate_pages(struct list_head *from, new_page_t get_new_page,
 		unsigned long private, enum migrate_mode mode, int reason)