tree:   https://github.com/lunn/linux.git v5.7-rc4-net-next-cable-test-tdr
head:   53c1ec2fa62252d289cd0e9fa711c2f49a3ecf71
commit: 10af06403ef236f4d4fa7881fe17e2b49582c0f3 [4/7] net: phy: marvell: Add support for amplitude graph
config: um-allmodconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        git checkout 10af06403ef236f4d4fa7881fe17e2b49582c0f3
        # save the attached .config to linux build tree
        make ARCH=um 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

In file included from drivers/net/phy/marvell.c:30:0:
include/linux/ethtool_netlink.h:64:1: error: expected identifier or '(' before '{' token
{
^
>> include/linux/ethtool_netlink.h:62:19: warning: 'ethnl_cable_test_step' used but never defined
static inline int ethnl_cable_test_step(struct phy_device *phydev, u32 first,
^~~~~~~~~~~~~~~~~~~~~

vim +/ethnl_cable_test_step +62 include/linux/ethtool_netlink.h

cef86bd8dfcd39 Andrew Lunn 2020-03-29  57  
cef86bd8dfcd39 Andrew Lunn 2020-03-29  58  static inline int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
cef86bd8dfcd39 Andrew Lunn 2020-03-29  59  {
cef86bd8dfcd39 Andrew Lunn 2020-03-29  60  	return -EOPNOTSUPP;
cef86bd8dfcd39 Andrew Lunn 2020-03-29  61  }
cef86bd8dfcd39 Andrew Lunn 2020-03-29 @62  static inline int ethnl_cable_test_step(struct phy_device *phydev, u32 first,

:::::: The code at line 62 was first introduced by commit
:::::: cef86bd8dfcd394e8882e4005f8cd3244e775b14 net: ethtool: Add helpers for cable test TDR data

:::::: TO: Andrew Lunn <andrew@lunn.ch>
:::::: CC: Andrew Lunn <andrew@lunn.ch>

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org