tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git memblock/for-next head: 31c6f50e037d3cbef51ed1a7d8981ee45b87e51f commit: 31c6f50e037d3cbef51ed1a7d8981ee45b87e51f [2/2] mm: memblock: drop __init from memblock functions to make it inline config: csky-randconfig-r014-20201116 (attached as .config) compiler: csky-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/rppt/linux.git/commit/?id... git remote add rppt https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git git fetch --no-tags rppt memblock/for-next git checkout 31c6f50e037d3cbef51ed1a7d8981ee45b87e51f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky 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 >>, old ones prefixed by <<): The function memblock_alloc() references the function __init memblock_alloc_try_nid(). This is often because memblock_alloc lacks a __init annotation or the annotation of memblock_alloc_try_nid is wrong. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org