diff -drupN a/include/linux/ethtool.h b/include/linux/ethtool.h
--- a/include/linux/ethtool.h	2018-08-06 17:23:04.000000000 +0300
+++ b/include/linux/ethtool.h	2022-06-12 05:28:14.000000000 +0300
@@ -79,9 +79,17 @@ enum {
 
 struct net_device;
 
+#ifdef CONFIG_NET_ETHTOOL
 /* Some generic methods drivers may use in their ethtool_ops */
 u32 ethtool_op_get_link(struct net_device *dev);
 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *eti);
+#else
+/* Some generic methods drivers may use in their ethtool_ops */
+static inline u32 ethtool_op_get_link(struct net_device *dev) { return 0; }
+static inline int
+ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *eti)
+{ return -EINVAL; }
+#endif
 
 /**
  * ethtool_rxfh_indir_default - get default value for RX flow hash indirection
@@ -146,6 +154,7 @@ struct ethtool_link_ksettings {
 #define ethtool_link_ksettings_test_link_mode(ptr, name, mode)		\
 	test_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
 
+#ifdef CONFIG_NET_ETHTOOL
 extern int
 __ethtool_get_link_ksettings(struct net_device *dev,
 			     struct ethtool_link_ksettings *link_ksettings);
@@ -156,6 +165,17 @@ void ethtool_convert_legacy_u32_to_link_
 /* return false if src had higher bits set. lower bits always updated. */
 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 				     const unsigned long *src);
+#else
+static inline u32 __ethtool_get_link_ksettings(struct net_device *dev,
+			struct ethtool_link_ksettings *link_ksettings)
+{
+	return -EOPNOTSUPP;
+}
+static inline void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
+					     u32 legacy_u32){ }
+static inline bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
+				     const unsigned long *src) { return false; }
+#endif
 
 /**
  * struct ethtool_ops - optional netdev operations