--- /dev/null
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __DM_UTIL_H
+
+void dm_warn(const char *fmt, ...);
+
+#ifdef DEBUG
+void dm_dbg(const char *fmt, ...);
+#else
+static inline void dm_dbg(const char *fmt, ...)
+{
+}
+#endif
+
+struct list_head;
+
+/**
+ * list_count_items() - Count number of items in a list
+ *
+ * @param head: Head of list
+ * @return number of items, or 0 if empty
+ */
+int list_count_items(struct list_head *head);
+
+#endif