Hi Pravin, I love your patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Pravin-B-Shelar/GTP-add-support-... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 91163f82143630a9629a8bf0227d49173697c69c config: x86_64-randconfig-r023-20201209 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/aaf7f4d49a6f3be16634aae4d0a84ed96... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Pravin-B-Shelar/GTP-add-support-for-flow-based-tunneling-API/20201211-150317 git checkout aaf7f4d49a6f3be16634aae4d0a84ed96f50e70c # 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 >>): In file included from <command-line>:32: 42 | __u8 ver; | ^~~~ ./usr/include/linux/gtp.h:43:2: error: unknown type name '__u8' 43 | __u8 flags; | ^~~~ ./usr/include/linux/gtp.h:44:2: error: unknown type name '__u8' 44 | __u8 type; | ^~~~ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org