tree: git://git.infradead.org/users/hch/block.git block-kill-bd_inode head: ffeb1c3218d3511f9972cc09dfe37a29c0da40cb commit: e774673fc5332e888028f74b7e83c9797c432395 [5/40] mtd/block2mtd: use bdev_nr_sectors instead of open coding it config: m68k-randconfig-r002-20211012 (attached as .config) compiler: m68k-linux-gcc (GCC) 11.2.0 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 remote add hch-block git://git.infradead.org/users/hch/block.git git fetch --no-tags hch-block block-kill-bd_inode git checkout e774673fc5332e888028f74b7e83c9797c432395 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash 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 >>): m68k-linux-ld: arch/m68k/kernel/uboot.o: in function `process_uboot_commandline': uboot.c:(.init.text+0x30): undefined reference to `_init_sp' m68k-linux-ld: drivers/mtd/devices/block2mtd.o: in function `add_device.constprop.0.isra.0': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org