tree: git://git.infradead.org/users/hch/misc.git iov-cleanup head: af6ff5b4436d80d1046d19f161a5bec185b1fa57 commit: 27b76cc5487485cba9ba19c672b6e6b99d61027e [6/9] fs: remove the compat readv/writev syscalls config: s390-randconfig-r021-20200917 (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 git checkout 27b76cc5487485cba9ba19c672b6e6b99d61027e # 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: arch/s390/kernel/entry.o: in function `sys_call_table_emu': (.rodata+0x1248): undefined reference to `__s390_' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org