Hi Jisheng, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.8-rc2 next-20200622] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jisheng-Zhang/net-phy-call-phy_d... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 625d3449788f85569096780592549d0340e9c0c7 config: x86_64-lkp (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): /tmp/ccwmxln4.s: Assembler messages: /tmp/ccwmxln4.s:255: Error: symbol `__ksymtab_phy_request_interrupt' is already defined --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org