Hi Randy, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 4.19/android_r head: 71dbe8b787e34f3ce300217fc6ca5a2ec4aef447 commit: d50a6d412d61dbbde36becaf093d1b8ae3868b8a [19121/23451] binder.c modify secids for struct and param by refs config: s390-allyesconfig (attached as .config) compiler: s390-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/intel/linux-intel-lts/commit/d50a6d412d61dbbde36becaf0... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 4.19/android_r git checkout d50a6d412d61dbbde36becaf093d1b8ae3868b8a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 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 >>): s390-linux-ld: net/socket.o: in function `sock_ioctl': s390-linux-ld: net/socket.o: in function `compat_sock_ioctl': socket.c:(.text+0x292e): undefined reference to `compat_wext_handle_ioctl' s390-linux-ld: net/core/net-procfs.o: in function `dev_proc_net_exit': net-procfs.c:(.text+0xbf4): undefined reference to `wext_proc_exit' s390-linux-ld: net/core/net-procfs.o: in function `dev_proc_net_init': net-procfs.c:(.text+0xd08): undefined reference to `wext_proc_init' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for WIRELESS_EXT Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_CORE Depends on NET && WIRELESS && (CFG80211_WEXT || WIRELESS_EXT Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_PROC Depends on NET && WIRELESS && PROC_FS && WEXT_CORE Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_PRIV Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_SPY Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org