Merge branch 'stable/cleancache.v13' into linux-next

* stable/cleancache.v13:
  mm: cleancache: Use __read_mostly as appropiate.
  mm: cleancache: report statistics via debugfs instead of sysfs.
  mm: zcache/tmem/cleancache: s/flush/invalidate/
  mm: cleancache: s/flush/invalidate/

mm/filemap.c

@@ -123,7 +123,7 @@ void __delete_from_page_cache(struct page *page)
 	if (PageUptodate(page) && PageMappedToDisk(page))
 		cleancache_put_page(page);
 	else
-		cleancache_flush_page(mapping, page);
+		cleancache_invalidate_page(mapping, page);
 
 	radix_tree_delete(&mapping->page_tree, page->index);
 	page->mapping = NULL;