--- ethtool-6.4.old/uapi/linux/ethtool.h
+++ ethtool-6.4/uapi/linux/ethtool.h
@@ -1501,6 +1501,15 @@
  * @queue_mask: Bitmap of the queues which sub command apply to
  * @data: A complete command structure following for each of the queues addressed
  */
+
+/* ethtool.h epxects __KERNEL_DIV_ROUND_UP to be defined by */
+/* <linux/kernel.h> */
+
+#include <linux/kernel.h>
+#ifndef __KERNEL_DIV_ROUND_UP
+#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#endif
+
 struct ethtool_per_queue_op {
 	__u32	cmd;
 	__u32	sub_command;