Hi Huangzhaoyang, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on arm64/for-next/core] [also build test WARNING on v5.16-rc1 next-20211118] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Huangzhaoyang/arch-arm64-have-me... base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core config: arm64-randconfig-r023-20211115 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/1e24a50ddba38b8bed8d75bc2b788da88... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Huangzhaoyang/arch-arm64-have-memblocks-out-of-kernel-text-use-section-map/20211112-172142 git checkout 1e24a50ddba38b8bed8d75bc2b788da88b354522 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 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 >>, old ones prefixed by <<): The function __create_pgd_mapping() references the variable __initdata crash_mem_map. This is often because __create_pgd_mapping lacks a __initdata annotation or the annotation of crash_mem_map is wrong. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org