diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 8b8e0dac0a2afc256fafc4b51c9bcd05530468b0..4396b82fabafeaad74a65149073de9298037ce57 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -38,6 +38,7 @@
  *	page->lru: links together first pages of various zspages.
  *		Basically forming list of zspages in a fullness group.
  *	page->mapping: class index and fullness group of the zspage
+ *	page->inuse: the number of objects that are used in this zspage
  *
  * Usage of struct page flags:
  *	PG_private: identifies the first component page