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(a)intel.com&gt; 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 { ^ 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(a)lunn.ch&gt; :::::: CC: Andrew Lunn <andrew(a)lunn.ch&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org