diff --git a/include/linux/mm.h b/include/linux/mm.h
index a990215..cd12327 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -329,6 +329,13 @@
 #define page_private(page)		((page)->private)
 #define set_page_private(page, v)	((page)->private = (v))
 
+#if !defined(__HAVE_ARCH_PTE_DEVMAP) || !defined(CONFIG_TRANSPARENT_HUGEPAGE)
+static inline int pmd_devmap(pmd_t pmd)
+{
+	return 0;
+}
+#endif
+
 /*
  * FIXME: take this include out, include page-flags.h in
  * files which need it (119 of them)