--- zzzz-none-000/linux-3.10.107/drivers/net/ethernet/atheros/atlx/atl2.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/net/ethernet/atheros/atlx/atl2.h	2021-02-04 17:41:59.000000000 +0000
@@ -42,7 +42,7 @@
 #include "atlx.h"
 
 #ifdef ETHTOOL_OPS_COMPAT
-extern int ethtool_ioctl(struct ifreq *ifr);
+int ethtool_ioctl(struct ifreq *ifr);
 #endif
 
 #define PCI_COMMAND_REGISTER	PCI_COMMAND