diff --git a/net/socket.c b/net/socket.c
index 5212447..575c84f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2643,13 +2643,13 @@
 		return -EFAULT;
 
 	if (convert_in) {
-		/* We expect there to be holes between fs.m_u and
+		/* We expect there to be holes between fs.m_ext and
 		 * fs.ring_cookie and at the end of fs, but nowhere else.
 		 */
-		BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_u) +
-			     sizeof(compat_rxnfc->fs.m_u) !=
-			     offsetof(struct ethtool_rxnfc, fs.m_u) +
-			     sizeof(rxnfc->fs.m_u));
+		BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
+			     sizeof(compat_rxnfc->fs.m_ext) !=
+			     offsetof(struct ethtool_rxnfc, fs.m_ext) +
+			     sizeof(rxnfc->fs.m_ext));
 		BUILD_BUG_ON(
 			offsetof(struct compat_ethtool_rxnfc, fs.location) -
 			offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
@@ -2657,7 +2657,7 @@
 			offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 
 		if (copy_in_user(rxnfc, compat_rxnfc,
-				 (void *)(&rxnfc->fs.m_u + 1) -
+				 (void *)(&rxnfc->fs.m_ext + 1) -
 				 (void *)rxnfc) ||
 		    copy_in_user(&rxnfc->fs.ring_cookie,
 				 &compat_rxnfc->fs.ring_cookie,
@@ -2674,7 +2674,7 @@
 
 	if (convert_out) {
 		if (copy_in_user(compat_rxnfc, rxnfc,
-				 (const void *)(&rxnfc->fs.m_u + 1) -
+				 (const void *)(&rxnfc->fs.m_ext + 1) -
 				 (const void *)rxnfc) ||
 		    copy_in_user(&compat_rxnfc->fs.ring_cookie,
 				 &rxnfc->fs.ring_cookie,