Hi Vlastimil, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on linux/master linus/master v5.15-rc5] [cannot apply to hnaz-mm/master next-20211012] [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/Vlastimil-Babka/lib-stackdepot-allow-optional-init-and-stack_table-allocation-by-kvmalloc/20211012-170816 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-randconfig-s021-20211012 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/1cd8ce52c520c26c513899fb5aee42b8e5f60d0d git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vlastimil-Babka/lib-stackdepot-allow-optional-init-and-stack_table-allocation-by-kvmalloc/20211012-170816 git checkout 1cd8ce52c520c26c513899fb5aee42b8e5f60d0d # save the attached .config to linux build tree 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 as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> lib/stackdepot.c:150:1: sparse: sparse: symbol 'stack_depot_init_mutex' was not declared. Should it be static? Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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