Hi Alexey, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on kees/for-next/pstore linus/master v5.12-rc2 next-20210310] [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/Alexey-Gladkov/proc-Relax-check-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32 config: powerpc-randconfig-s032-20210309 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-262-g5e674421-dirty # https://github.com/0day-ci/linux/commit/57a1fff647a507e103bbe22d67c6fe6b5... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexey-Gladkov/proc-Relax-check-of-mount-visibility/20210311-022252 git checkout 57a1fff647a507e103bbe22d67c6fe6b54c6a088 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): fs/proc/root.c: In function 'proc_reconfigure': 233 | put_cred(fs_info->mounter_cred); | ^~~~~~~ | qc_info fs/proc/root.c:233:11: note: each undeclared identifier is reported only once for each function it appears in vim +233 fs/proc/root.c 97412950b10e64 Vasiliy Kulikov 2012-01-10 226 66f592e2ece038 David Howells 2018-11-01 227 static int proc_reconfigure(struct fs_context *fc) 97412950b10e64 Vasiliy Kulikov 2012-01-10 228 { 66f592e2ece038 David Howells 2018-11-01 229 struct super_block *sb = fc->root->d_sb; 02b9984d640873 Theodore Ts'o 2014-03-13 230 02b9984d640873 Theodore Ts'o 2014-03-13 231 sync_filesystem(sb); 66f592e2ece038 David Howells 2018-11-01 232 b84f25e5938b65 Alexey Gladkov 2021-03-10 @233 put_cred(fs_info->mounter_cred); b84f25e5938b65 Alexey Gladkov 2021-03-10 234 fs_info->mounter_cred = get_cred(fc->cred); b84f25e5938b65 Alexey Gladkov 2021-03-10 235 57a1fff647a507 Alexey Gladkov 2021-03-10 236 return proc_apply_options(sb, fc, current_user_ns()); 97412950b10e64 Vasiliy Kulikov 2012-01-10 237 } 97412950b10e64 Vasiliy Kulikov 2012-01-10 238 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org