Hi Zhen, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.4-rc3 next-20230525] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Zhen-Lei/kexec-fix-a-memory-leak-in-crash_shrink_memory/20230527-203821 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230527123439.772-6-thunder.leizhen%40huawei.com patch subject: [PATCH 5/6] kexec: add helper __crash_shrink_memory() config: x86_64-randconfig-s033-20230528 (https://download.01.org/0day-ci/archive/20230528/202305281410.FdGZvhsb-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/dea97cef503d26e05d0e11818ae44176056ddf64 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zhen-Lei/kexec-fix-a-memory-leak-in-crash_shrink_memory/20230527-203821 git checkout dea97cef503d26e05d0e11818ae44176056ddf64 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202305281410.FdGZvhsb-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> kernel/kexec_core.c:1108:5: sparse: sparse: symbol '__crash_shrink_memory' was not declared. Should it be static? -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
