tree: git://github.com/linux-chenxing/linux.git mstar_v5_14_rebase head: 651efd0e52f225e60faa8b30f9768021e2104d3c commit: 78ccc706083df2c5a3abc63b37f3fb659047cd6b [85/352] pll common makefile config: alpha-randconfig-r004-20210719 (attached as .config) compiler: alpha-linux-gcc (GCC) 10.3.0 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 # https://github.com/linux-chenxing/linux/commit/78ccc706083df2c5a3abc63b37... git remote add linux-chenxing git://github.com/linux-chenxing/linux.git git fetch --no-tags linux-chenxing mstar_v5_14_rebase git checkout 78ccc706083df2c5a3abc63b37f3fb659047cd6b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/clk/mstar/clk-mstar-pll_common.c: In function 'mstar_pll_common_probe': 14 | int numparents, numoutputs, numrates, pllindex; | ^~~~~~~~~~ vim +/numparents +14 drivers/clk/mstar/clk-mstar-pll_common.c c8123925d33e64 Daniel Palmer 2020-11-02 7 c8123925d33e64 Daniel Palmer 2020-11-02 8 int mstar_pll_common_probe(struct platform_device *pdev, struct mstar_pll **pll, c8123925d33e64 Daniel Palmer 2020-11-02 9 const struct clk_ops *clk_ops) c8123925d33e64 Daniel Palmer 2020-11-02 10 { c8123925d33e64 Daniel Palmer 2020-11-02 11 struct mstar_pll_output* output; c8123925d33e64 Daniel Palmer 2020-11-02 12 struct clk_init_data *clk_init; c8123925d33e64 Daniel Palmer 2020-11-02 13 struct clk* clk; c8123925d33e64 Daniel Palmer 2020-11-02 @14 int numparents, numoutputs, numrates, pllindex; :::::: The code at line 14 was first introduced by commit :::::: c8123925d33e64e037be76469291e62cd81e586f clk: mstar: pll common :::::: TO: Daniel Palmer <daniel(a)0x0f.com&gt; :::::: CC: Daniel Palmer <daniel(a)0x0f.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org