Hi Stefan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on zohar-integrity/next-integrity] [also build test WARNING on linux/master linus/master v5.16-rc5] [cannot apply to jmorris-security/next-testing next-20211217] [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/Stefan-Berger/ima-Namespace-IMA-... base: https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git next-integrity config: i386-randconfig-s002-20211216 (https://download.01.org/0day-ci/archive/20211218/202112180002.CNO8riQv-lk...) 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/fac0e082272f4058a9a9b27762fbf9cec... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stefan-Berger/ima-Namespace-IMA-with-audit-support-in-IMA-ns/20211216-134611 git checkout fac0e082272f4058a9a9b27762fbf9cecca8772b # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org