Hi Oleksij,

I love your patch! Yet something to improve:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Oleksij-Rempel/net-phy-Add-driver-specific-get-set_eee-support-for-non-standard-PHYs/20230327-222630
patch link:    https://lore.kernel.org/r/20230327142202.3754446-5-o.rempel%40pengutronix.de
patch subject: [PATCH net-next v2 4/8] ethtool: eee: Rework get/set handler for SmartEEE-capable PHYs with non-EEE MACs
config: csky-defconfig (https://download.01.org/0day-ci/archive/20230328/202303281117.3288i7kT-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/fcee3230c8abb824746744ba0fc39dfd626faa65
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Oleksij-Rempel/net-phy-Add-driver-specific-get-set_eee-support-for-non-standard-PHYs/20230327-222630
        git checkout fcee3230c8abb824746744ba0fc39dfd626faa65
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot [off-list ref]
| Link: https://lore.kernel.org/oe-kbuild-all/202303281117.3288i7kT-lkp@intel.com/ (local)

All errors (new ones prefixed by >>):

   csky-linux-ld: net/ethtool/common.o: in function `__ethtool_get_eee':
   common.c:(.text+0x45c): undefined reference to `phy_ethtool_get_eee'
   csky-linux-ld: net/ethtool/common.o: in function `__ethtool_set_eee':
   common.c:(.text+0x49c): undefined reference to `phy_ethtool_set_eee'

quoted

csky-linux-ld: common.c:(.text+0x4b8): undefined reference to `phy_ethtool_get_eee'
csky-linux-ld: common.c:(.text+0x4bc): undefined reference to `phy_ethtool_set_eee'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests