[kbuild-all] [net-next:master 183/184] drivers/net/ethernet/ibm/ibmvnic.c:855:2: warning: enumeration value 'VNIC_DOWN' not handled in switch

tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 76cf404c40ae8efcf8c6405535a3f6f69e6ba2a5 commit: 53f8b1b25419a14b784feb6706bfe5bac03c5a75 [183/184] ibmvnic: Allow device probe if the device is not ready at boot config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit... git remote add net-next https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git git fetch --no-tags net-next master git checkout 53f8b1b25419a14b784feb6706bfe5bac03c5a75 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): drivers/net/ethernet/ibm/ibmvnic.c: In function 'adapter_state_to_string': 855 | switch (state) { | ^~~~~~ drivers/net/ethernet/ibm/ibmvnic.c: In function 'reset_reason_to_string': 1958 | switch (reason) { | ^~~~~~ In file included from include/linux/string.h:269, from arch/powerpc/include/asm/paca.h:15, from arch/powerpc/include/asm/current.h:13, from include/linux/thread_info.h:22, from include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:16, from drivers/net/ethernet/ibm/ibmvnic.c:35: In function 'strncpy', inlined from 'handle_vpd_rsp' at drivers/net/ethernet/ibm/ibmvnic.c:4388:3: include/linux/fortify-string.h:27:30: warning: '__builtin_strncpy' output truncated before terminating nul copying 3 bytes from a string of the same length [-Wstringop-truncation] 27 | #define __underlying_strncpy __builtin_strncpy | ^ include/linux/fortify-string.h:38:9: note: in expansion of macro '__underlying_strncpy' 38 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ vim +/VNIC_DOWN +855 drivers/net/ethernet/ibm/ibmvnic.c 86f669b2b7491b Nathan Fontenot 2018-02-19 852 0666ef7f61ca76 Lijun Pan 2021-04-12 853 static const char *adapter_state_to_string(enum vnic_state state) 0666ef7f61ca76 Lijun Pan 2021-04-12 854 { 0666ef7f61ca76 Lijun Pan 2021-04-12 @855 switch (state) { 0666ef7f61ca76 Lijun Pan 2021-04-12 856 case VNIC_PROBING: 0666ef7f61ca76 Lijun Pan 2021-04-12 857 return "PROBING"; 0666ef7f61ca76 Lijun Pan 2021-04-12 858 case VNIC_PROBED: 0666ef7f61ca76 Lijun Pan 2021-04-12 859 return "PROBED"; 0666ef7f61ca76 Lijun Pan 2021-04-12 860 case VNIC_OPENING: 0666ef7f61ca76 Lijun Pan 2021-04-12 861 return "OPENING"; 0666ef7f61ca76 Lijun Pan 2021-04-12 862 case VNIC_OPEN: 0666ef7f61ca76 Lijun Pan 2021-04-12 863 return "OPEN"; 0666ef7f61ca76 Lijun Pan 2021-04-12 864 case VNIC_CLOSING: 0666ef7f61ca76 Lijun Pan 2021-04-12 865 return "CLOSING"; 0666ef7f61ca76 Lijun Pan 2021-04-12 866 case VNIC_CLOSED: 0666ef7f61ca76 Lijun Pan 2021-04-12 867 return "CLOSED"; 0666ef7f61ca76 Lijun Pan 2021-04-12 868 case VNIC_REMOVING: 0666ef7f61ca76 Lijun Pan 2021-04-12 869 return "REMOVING"; 0666ef7f61ca76 Lijun Pan 2021-04-12 870 case VNIC_REMOVED: 0666ef7f61ca76 Lijun Pan 2021-04-12 871 return "REMOVED"; 0666ef7f61ca76 Lijun Pan 2021-04-12 872 } 07b5dc1d515a9a Michal Suchanek 2021-05-20 873 return "UNKNOWN"; 0666ef7f61ca76 Lijun Pan 2021-04-12 874 } 0666ef7f61ca76 Lijun Pan 2021-04-12 875 :::::: The code at line 855 was first introduced by commit :::::: 0666ef7f61ca763897fdcd385d65555dd4764514 ibmvnic: print adapter state as a string :::::: TO: Lijun Pan <lijunp213(a)gmail.com&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