mm/page_alloc.c: fix kernel-doc warning

Add description of function parameter 'mt' to fix kernel-doc warning:

  mm/page_alloc.c:3246: warning: Function parameter or member 'mt' not described in '__putback_isolated_page'

Signed-off-by: Randy Dunlap <>
Signed-off-by: Andrew Morton <>
Acked-by: Pankaj Gupta <>
Signed-off-by: Linus Torvalds <>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 114c56c..d98441a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3224,6 +3224,7 @@
  * __putback_isolated_page - Return a now-isolated page back where we got it
  * @page: Page that was isolated
  * @order: Order of the isolated page
+ * @mt: The page's pageblock's migratetype
  * This function is meant to return a page pulled from the free lists via
  * __isolate_free_page back to the free lists they were pulled from.