Hi Volodymyr, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Volodymyr-Mytnyk/net-marvell-pre... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 40088915f547b52635f022c1e1e18df65ae3153a config: arm-randconfig-r024-20211015 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a49f5386ce6b091da66ea7c3a1d9a588d53becf7) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/af0e1a7d7646e639d30d05831aa0a5c4a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Volodymyr-Mytnyk/net-marvell-prestera-add-firmware-v4-0-support/20211015-225941 git checkout af0e1a7d7646e639d30d05831aa0a5c4a1b22ff5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 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 >>): int prestera_hw_port_state_set(const struct prestera_port *port, ^ drivers/net/ethernet/marvell/prestera/prestera_hw.c:786:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int prestera_hw_port_state_set(const struct prestera_port *port, ^ static 1 warning generated. vim +/prestera_hw_port_state_set +786 drivers/net/ethernet/marvell/prestera/prestera_hw.c e1189d9a5fbec8 Vadym Kochan 2020-09-16 785 501ef3066c89d7 Vadym Kochan 2020-09-16 @786 int prestera_hw_port_state_set(const struct prestera_port *port, 501ef3066c89d7 Vadym Kochan 2020-09-16 787 bool admin_state) 501ef3066c89d7 Vadym Kochan 2020-09-16 788 { 501ef3066c89d7 Vadym Kochan 2020-09-16 789 struct prestera_msg_port_attr_req req = { 501ef3066c89d7 Vadym Kochan 2020-09-16 790 .attr = PRESTERA_CMD_PORT_ATTR_ADMIN_STATE, 501ef3066c89d7 Vadym Kochan 2020-09-16 791 .port = port->hw_id, 501ef3066c89d7 Vadym Kochan 2020-09-16 792 .dev = port->dev_id, 501ef3066c89d7 Vadym Kochan 2020-09-16 793 .param = { 501ef3066c89d7 Vadym Kochan 2020-09-16 794 .admin_state = admin_state, 501ef3066c89d7 Vadym Kochan 2020-09-16 795 } 501ef3066c89d7 Vadym Kochan 2020-09-16 796 }; 501ef3066c89d7 Vadym Kochan 2020-09-16 797 501ef3066c89d7 Vadym Kochan 2020-09-16 798 return prestera_cmd(port->sw, PRESTERA_CMD_TYPE_PORT_ATTR_SET, 501ef3066c89d7 Vadym Kochan 2020-09-16 799 &req.cmd, sizeof(req)); 501ef3066c89d7 Vadym Kochan 2020-09-16 800 } 501ef3066c89d7 Vadym Kochan 2020-09-16 801 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org