diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 8e7577c..a12cc3f 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -153,11 +153,11 @@
 		vfree(addr);
 	} else {
 		struct page *page = virt_to_page(addr);
-		if (!PageReserved(page)) { /* Is bootmem ? */
-			size_t table_size =
-				sizeof(struct page_cgroup) * PAGES_PER_SECTION;
-			free_pages_exact(addr, table_size);
-		}
+		size_t table_size =
+			sizeof(struct page_cgroup) * PAGES_PER_SECTION;
+
+		BUG_ON(PageReserved(page));
+		free_pages_exact(addr, table_size);
 	}
 }
 #endif