diff --git a/sys/compat/linuxkpi/common/include/linux/device.h b/sys/compat/linuxkpi/common/include/linux/device.h
--- a/sys/compat/linuxkpi/common/include/linux/device.h
+++ b/sys/compat/linuxkpi/common/include/linux/device.h
@@ -199,6 +199,20 @@
 #define	dev_printk(lvl, dev, fmt, ...)					\
 	    device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
 
+#define	dev_WARN(dev, fmt, ...)	\
+    device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
+
+#define	dev_WARN_ONCE(dev, condition, fmt, ...) do {		\
+	static bool __dev_WARN_ONCE;				\
+	bool __ret_warn_on = (condition);			\
+	if (unlikely(__ret_warn_on)) {				\
+		if (!__dev_WARN_ONCE) {				\
+			__dev_WARN_ONCE = true;			\
+			device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__); \
+		}						\
+	}							\
+} while (0)
+
 #define dev_info_once(dev, ...) do {		\
 	static bool __dev_info_once;		\
 	if (!__dev_info_once) {			\