tree: https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git devlink head: 75088f5c533815580092fd7dca787c06e75ba7ba commit: 3c73f365d81cf18adf846a4ef36e605ad52acd0a [4/16] devlink: Clean registration of devlink port config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/commi... git remote add leon-rdma https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git git fetch --no-tags leon-rdma devlink git checkout 3c73f365d81cf18adf846a4ef36e605ad52acd0a # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): drivers/net/ethernet/marvell/prestera/prestera_devlink.c: In function 'prestera_devlink_port_register': 425 | int err; | ^~~ cc1: all warnings being treated as errors -- drivers/net/ethernet/intel/ice/ice_devlink.c: In function 'ice_devlink_create_pf_port': 501 | struct device *dev; | ^~~ drivers/net/ethernet/intel/ice/ice_devlink.c: In function 'ice_devlink_create_vf_port': drivers/net/ethernet/intel/ice/ice_devlink.c:550:17: error: variable 'dev' set but not used [-Werror=unused-but-set-variable] 550 | struct device *dev; | ^~~ cc1: all warnings being treated as errors vim +/err +425 drivers/net/ethernet/marvell/prestera/prestera_devlink.c 34dd1710f5a3c9 Vadym Kochan 2020-09-16 419 34dd1710f5a3c9 Vadym Kochan 2020-09-16 420 int prestera_devlink_port_register(struct prestera_port *port) 34dd1710f5a3c9 Vadym Kochan 2020-09-16 421 { 34dd1710f5a3c9 Vadym Kochan 2020-09-16 422 struct prestera_switch *sw = port->sw; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 423 struct devlink *dl = priv_to_devlink(sw); 34dd1710f5a3c9 Vadym Kochan 2020-09-16 424 struct devlink_port_attrs attrs = {}; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 @425 int err; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 426 34dd1710f5a3c9 Vadym Kochan 2020-09-16 427 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 428 attrs.phys.port_number = port->fp_id; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 429 attrs.switch_id.id_len = sizeof(sw->id); 34dd1710f5a3c9 Vadym Kochan 2020-09-16 430 memcpy(attrs.switch_id.id, &sw->id, attrs.switch_id.id_len); 34dd1710f5a3c9 Vadym Kochan 2020-09-16 431 34dd1710f5a3c9 Vadym Kochan 2020-09-16 432 devlink_port_attrs_set(&port->dl_port, &attrs); 34dd1710f5a3c9 Vadym Kochan 2020-09-16 433 3c73f365d81cf1 Leon Romanovsky 2021-11-03 434 devlink_port_register(dl, &port->dl_port, port->fp_id); 34dd1710f5a3c9 Vadym Kochan 2020-09-16 435 return 0; 34dd1710f5a3c9 Vadym Kochan 2020-09-16 436 } 34dd1710f5a3c9 Vadym Kochan 2020-09-16 437 :::::: The code at line 425 was first introduced by commit :::::: 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25 net: marvell: prestera: Add basic devlink support :::::: TO: Vadym Kochan <vadym.kochan(a)plvision.eu&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org