tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: aa515cdce7a151dcc14b7600d33f1414c6fa32c9 commit: b7a9e0da2d1c954b7c38217a29e002528b90d174 [2144/2798] net: switchdev: remove vid_begin -> vid_end range from VLAN objects config: x86_64-randconfig-a004-20210114 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6077d55381a6aa3e947ef7abdc36a7515c598c8a) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout b7a9e0da2d1c954b7c38217a29e002528b90d174 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 warnings (new ones prefixed by >>): vid, flag_untagged, ^~~ drivers/net/ethernet/marvell/prestera/prestera_switchdev.c:1032:9: note: initialize the variable 'vid' to silence this warning u16 vid; ^ = 0 1 warning generated. vim +/vid +1049 drivers/net/ethernet/marvell/prestera/prestera_switchdev.c e1189d9a5fbec815 Vadym Kochan 2020-09-16 1020 e1189d9a5fbec815 Vadym Kochan 2020-09-16 1021 static int prestera_port_vlans_add(struct prestera_port *port, e1189d9a5fbec815 Vadym Kochan 2020-09-16 1022 const struct switchdev_obj_port_vlan *vlan, e1189d9a5fbec815 Vadym Kochan 2020-09-16 1023 struct switchdev_trans *trans, e1189d9a5fbec815 Vadym Kochan 2020-09-16 1024 struct netlink_ext_ack *extack) e1189d9a5fbec815 Vadym Kochan 2020-09-16 1025 { e1189d9a5fbec815 Vadym Kochan 2020-09-16 1026 bool flag_untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1027 bool flag_pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1028 struct net_device *dev = vlan->obj.orig_dev; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1029 struct prestera_bridge_port *br_port; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1030 struct prestera_switch *sw = port->sw; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1031 struct prestera_bridge *bridge; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1032 u16 vid; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1033 e1189d9a5fbec815 Vadym Kochan 2020-09-16 1034 if (netif_is_bridge_master(dev)) e1189d9a5fbec815 Vadym Kochan 2020-09-16 1035 return 0; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1036 e1189d9a5fbec815 Vadym Kochan 2020-09-16 1037 if (switchdev_trans_ph_commit(trans)) e1189d9a5fbec815 Vadym Kochan 2020-09-16 1038 return 0; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1039 e1189d9a5fbec815 Vadym Kochan 2020-09-16 1040 br_port = prestera_bridge_port_by_dev(sw->swdev, dev); e1189d9a5fbec815 Vadym Kochan 2020-09-16 1041 if (WARN_ON(!br_port)) e1189d9a5fbec815 Vadym Kochan 2020-09-16 1042 return -EINVAL; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1043 e1189d9a5fbec815 Vadym Kochan 2020-09-16 1044 bridge = br_port->bridge; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1045 if (!bridge->vlan_enabled) e1189d9a5fbec815 Vadym Kochan 2020-09-16 1046 return 0; e1189d9a5fbec815 Vadym Kochan 2020-09-16 1047 b7a9e0da2d1c954b Vladimir Oltean 2021-01-09 1048 return prestera_bridge_port_vlan_add(port, br_port, e1189d9a5fbec815 Vadym Kochan 2020-09-16 @1049 vid, flag_untagged, e1189d9a5fbec815 Vadym Kochan 2020-09-16 1050 flag_pvid, extack); e1189d9a5fbec815 Vadym Kochan 2020-09-16 1051 } e1189d9a5fbec815 Vadym Kochan 2020-09-16 1052 :::::: The code at line 1049 was first introduced by commit :::::: e1189d9a5fbec8153dbe03f3589bc2baa96694e2 net: marvell: prestera: Add Switchdev driver implementation :::::: 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