tree: https://github.com/frank-w/BPI-R2-4.14 5.7-rc head: b020fdd1ceb1683f13d77545ad0aa5c194fed62f commit: 0493f8e427d318aecd1c2514f39da1bef1bbe933 [6/39] net: dsa: mt7530: Add the support of MT7531 switch config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 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 git checkout 0493f8e427d318aecd1c2514f39da1bef1bbe933 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 >>, old ones prefixed by <<): drivers/net/dsa/mt7530.c: In function 'mt7530_pad_setup': drivers/net/dsa/mt7530.c:1723:3: error: implicit declaration of function 'mt7623_pad_clk_setup'; did you mean 'mt7530_pad_clk_setup'? [-Werror=implicit-function-declaration] 1723 | mt7623_pad_clk_setup(ds); | ^~~~~~~~~~~~~~~~~~~~ | mt7530_pad_clk_setup drivers/net/dsa/mt7530.c: At top level: 2107 | void mt7531_sgmii_restart_an(struct dsa_switch *ds, int port) | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/mt7531_sgmii_restart_an +2107 drivers/net/dsa/mt7530.c 2106 2108 { 2109 struct mt7530_priv *priv = ds->priv; 2110 u32 val; 2111 2112 val = mt7530_read(priv, MT7531_PCS_CONTROL_1(port)); 2113 val |= MT7531_SGMII_AN_RESTART; 2114 mt7530_write(priv, MT7531_PCS_CONTROL_1(port), val); 2115 } 2116 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org