Hi Sumit, I love your patch! Yet something to improve: [auto build test ERROR on tty/tty-testing] [also build test ERROR on usb/usb-testing v5.7-rc7 next-20200529] [cannot apply to kgdb/kgdb-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Sumit-Garg/kdb-Improve-console-h... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2388a096e7865c043e83ece4e26654bd3d1a20d5) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): kgdbdbgp_io_ops.cons = early_dbgp_console; ^ ~~~~~~~~~~~~~~~~~~ & 1 error generated. vim +1062 drivers/usb/early/ehci-dbgp.c 1046 1047 static int __init kgdbdbgp_parse_config(char *str) 1048 { 1049 char *ptr; 1050 1051 if (!ehci_debug) { 1052 if (early_dbgp_init(str)) 1053 return -1; 1054 } 1055 ptr = strchr(str, ','); 1056 if (ptr) { 1057 ptr++; 1058 kgdbdbgp_wait_time = simple_strtoul(ptr, &ptr, 10); 1059 } 1060 kgdb_register_io_module(&kgdbdbgp_io_ops); 1061 if (early_dbgp_console.index != -1) 1063 1064 return 0; 1065 } 1066 early_param("kgdbdbgp", kgdbdbgp_parse_config); 1067 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org