Hi Colin, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Colin-Foster/Add-support-for-VSC... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 5e437416ff66981d8154687cfdf7de50b1d82bfc config: microblaze-buildonly-randconfig-r006-20210711 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 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/68d3578b85be193a45003b797fef9a8ee... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Colin-Foster/Add-support-for-VSC7511-7514-chips-over-SPI/20210711-032838 git checkout 68d3578b85be193a45003b797fef9a8ee3d1832b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 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 >>): 100 | int felix_mdio_register(struct ocelot *ocelot) | ^~~~~~~~~~~~~~~~~~~ 116 | int felix_mdio_bus_alloc(struct ocelot *ocelot) | ^~~~~~~~~~~~~~~~~~~~ 138 | void felix_mdio_bus_free(struct ocelot *ocelot) | ^~~~~~~~~~~~~~~~~~~ vim +/felix_mdio_register +100 drivers/net/dsa/ocelot/felix_mdio.c 99 101 { 102 struct felix *felix = ocelot_to_felix(ocelot); 103 struct device *dev = ocelot->dev; 104 int rc; 105 106 /* Needed in order to initialize the bus mutex lock */ 107 rc = mdiobus_register(felix->imdio); 108 if (rc < 0) { 109 dev_err(dev, "failed to register MDIO bus\n"); 110 felix->imdio = NULL; 111 } 112 113 return rc; 114 } 115 117 { 118 struct felix *felix = ocelot_to_felix(ocelot); 119 struct device *dev = ocelot->dev; 120 struct mii_bus *bus; 121 122 bus = devm_mdiobus_alloc(dev); 123 if (!bus) 124 return -ENOMEM; 125 126 bus->name = "Felix internal MDIO bus"; 127 bus->read = felix_mdio_read; 128 bus->write = felix_mdio_write; 129 bus->parent = dev; 130 bus->priv = ocelot; 131 snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev)); 132 133 felix->imdio = bus; 134 135 return 0; 136 } 137 139 { 140 struct felix *felix = ocelot_to_felix(ocelot); 141 142 if (felix->imdio) 143 mdiobus_unregister(felix->imdio); 144 } 145 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org