diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d02d643..3221091 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -469,6 +469,7 @@
 		p->mapping = TAIL_MAPPING;
 		set_compound_head(p, page);
 	}
+	atomic_set(compound_mapcount_ptr(page), -1);
 }
 
 #ifdef CONFIG_DEBUG_PAGEALLOC
@@ -733,7 +734,7 @@
 	const char *bad_reason = NULL;
 	unsigned long bad_flags = 0;
 
-	if (unlikely(page_mapcount(page)))
+	if (unlikely(atomic_read(&page->_mapcount) != -1))
 		bad_reason = "nonzero mapcount";
 	if (unlikely(page->mapping != NULL))
 		bad_reason = "non-NULL mapping";
@@ -857,7 +858,13 @@
 		ret = 0;
 		goto out;
 	}
-	if (page->mapping != TAIL_MAPPING) {
+	/* mapping in first tail page is used for compound_mapcount() */
+	if (page - head_page == 1) {
+		if (unlikely(compound_mapcount(page))) {
+			bad_page(page, "nonzero compound_mapcount", 0);
+			goto out;
+		}
+	} else if (page->mapping != TAIL_MAPPING) {
 		bad_page(page, "corrupted mapping in tail page", 0);
 		goto out;
 	}
@@ -1335,7 +1342,7 @@
 	const char *bad_reason = NULL;
 	unsigned long bad_flags = 0;
 
-	if (unlikely(page_mapcount(page)))
+	if (unlikely(atomic_read(&page->_mapcount) != -1))
 		bad_reason = "nonzero mapcount";
 	if (unlikely(page->mapping != NULL))
 		bad_reason = "non-NULL mapping";