tree: https://android.googlesource.com/kernel/goldfish android-3.18 head: 33196e88471cb8768e189775fe82fe933389eaf7 commit: 6442ef57cfbaf3eca475d15f2ae1ce7f73742f6f [14/20] linux/bitmap.h: handle constant zero-size bitmaps correctly config: parisc-buildonly-randconfig-r004-20210709 (attached as .config) compiler: hppa64-linux-gcc (GCC) 5.5.0 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 android-goldfish https://android.googlesource.com/kernel/goldfish git fetch --no-tags android-goldfish android-3.18 git checkout 6442ef57cfbaf3eca475d15f2ae1ce7f73742f6f # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-5.5.0 make.cross O=build_dir ARCH=parisc 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 warnings (new ones prefixed by >>): The variable .L809 references the function __init __alloc_bootmem() If the reference is valid then annotate the variable with or __refdata (see linux/init.h) or name the variable: --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org