Hi Ansuel, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Ansuel-Smith/Multiple-improvemen... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 3913ba732e972d88ebc391323999e780a9295852 config: x86_64-randconfig-a013-20210511 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/b9285aea591d3ba02e2ba882dbe097012... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ansuel-Smith/Multiple-improvement-to-qca8k-stability/20210511-101117 git checkout b9285aea591d3ba02e2ba882dbe097012ce2c6f1 # save the attached .config to linux build tree make W=1 W=1 ARCH=x86_64 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/dsa/qca8k.c: In function 'qca8k_mdio_register': 795 | return devm_of_mdiobus_register(priv->dev, bus, mdio); | ^~~~~~~~~~~~~~~~~~~~~~~~ | devm_mdiobus_register cc1: some warnings being treated as errors vim +795 drivers/net/dsa/qca8k.c 771 772 static int 773 qca8k_mdio_register(struct qca8k_priv *priv, struct device_node *mdio) 774 { 775 struct dsa_switch *ds = priv->ds; 776 struct mii_bus *bus; 777 778 bus = devm_mdiobus_alloc(ds->dev); 779 780 if (!bus) 781 return -ENOMEM; 782 783 bus->priv = (void *)priv; 784 bus->name = "qca8k slave mii"; 785 bus->read = qca8k_mdio_read; 786 bus->write = qca8k_mdio_write; 787 snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d", 788 ds->index); 789 790 bus->parent = ds->dev; 791 bus->phy_mask = ~ds->phys_mii_mask; 792 793 ds->slave_mii_bus = bus; 794 796 } 797 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org