Hi "Alvin, I love your patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on robh/for-next v5.17-rc6 next-20220301] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Alvin-ipraga/usb-typec-add-drivers-for-TUSB320xA-and-TS5USBA224/20220301-212251 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220302/202203020056.igXsHYzi-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 11.2.0 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/0day-ci/linux/commit/c60eb902fdeaef99cf2c10e84e0369ee6787753a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alvin-ipraga/usb-typec-add-drivers-for-TUSB320xA-and-TS5USBA224/20220301-212251 git checkout c60eb902fdeaef99cf2c10e84e0369ee6787753a # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/usb/typec/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/usb/typec/tusb320xa.c:407:6: warning: no previous prototype for 'tusb320xa_action_role_sw_put' [-Wmissing-prototypes] 407 | void tusb320xa_action_role_sw_put(void *data) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/usb/typec/tusb320xa.c:414:6: warning: no previous prototype for 'tusb320xa_action_unregister_port' [-Wmissing-prototypes] 414 | void tusb320xa_action_unregister_port(void *data) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/tusb320xa_action_role_sw_put +407 drivers/usb/typec/tusb320xa.c 406 > 407 void tusb320xa_action_role_sw_put(void *data) 408 { 409 struct usb_role_switch *role_sw = data; 410 411 usb_role_switch_put(role_sw); 412 } 413 > 414 void tusb320xa_action_unregister_port(void *data) 415 { 416 struct typec_port *port = data; 417 418 typec_unregister_port(port); 419 } 420 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx