-#define err(format, arg...) volume_id_log(LOG_ERR, __FILE__, __LINE__, format, ##arg)
-#define info(format, arg...) volume_id_log(LOG_INFO, __FILE__, __LINE__, format, ##arg)
+#ifndef PACKED
+#define PACKED __attribute__((packed))
+#endif
+
+#define err(format, arg...) volume_id_log_fn(LOG_ERR, __FILE__, __LINE__, format, ##arg)
+#define info(format, arg...) volume_id_log_fn(LOG_INFO, __FILE__, __LINE__, format, ##arg)