Hi Volodymyr, Thank you for the patch! Yet something to improve: [auto build test ERROR 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 7df621a3eea6761bc83e641aaca6963210c7290d config: arc-allyesconfig (attached as .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/b50d5c511379fc2b67d7ee496d62c76ec... 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/20211029-134025 git checkout b50d5c511379fc2b67d7ee496d62c76ecb06da34 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 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 >>): 284 | } __packed; | ^ cc1: all warnings being treated as errors vim +284 drivers/net/ethernet/marvell/prestera/prestera_hw.c 234 235 union prestera_msg_port_param { 236 u8 admin_state; 237 u8 oper_state; 238 __le32 mtu; 239 u8 mac[ETH_ALEN]; 240 u8 accept_frm_type; 241 __le32 speed; 242 u8 learning; 243 u8 flood; 244 __le32 link_mode; 245 u8 type; 246 u8 duplex; 247 u8 fec; 248 u8 fc; 249 250 union { 251 struct { 252 u8 admin:1; 253 u8 fc; 254 u8 ap_enable; 255 union { 256 struct { 257 __le32 mode; 258 u8 inband:1; 259 __le32 speed; 260 u8 duplex; 261 u8 fec; 262 u8 fec_supp; 263 } __packed reg_mode; 264 struct { 265 __le32 mode; 266 __le32 speed; 267 u8 fec; 268 u8 fec_supp; 269 } __packed ap_modes[PRESTERA_AP_PORT_MAX]; 270 } __packed; 271 } __packed mac; 272 struct { 273 u8 admin:1; 274 u8 adv_enable; 275 __le64 modes; 276 __le32 mode; 277 u8 mdix; 278 } __packed phy; 279 } __packed link; 280 281 struct prestera_msg_port_cap_param cap; 282 struct prestera_msg_port_flood_param flood_ext; 283 struct prestera_msg_event_port_param link_evt; 285 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org