Hi Alexey, Thank you for the patch! Yet something to improve: [auto build test ERROR on kselftest/next] [also build test ERROR on linux/master linus/master v5.12-rc6] [cannot apply to hnaz-linux-mm/master next-20210407] [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/Count-rlimits-in-each-user-namespace/20210408-011035 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next config: h8300-randconfig-r036-20210407 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/c51852ea5ec30e7b4817293557d70904e52fe33a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexey-Gladkov/Count-rlimits-in-each-user-namespace/20210408-011035 git checkout c51852ea5ec30e7b4817293557d70904e52fe33a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> mm/shmem.c:4096:5: error: conflicting types for 'shmem_lock' 4096 | int shmem_lock(struct file *file, int lock, struct user_struct *user) | ^~~~~~~~~~ In file included from include/linux/khugepaged.h:6, from mm/shmem.c:37: include/linux/shmem_fs.h:68:12: note: previous declaration of 'shmem_lock' was here 68 | extern int shmem_lock(struct file *file, int lock, struct ucounts *ucounts); | ^~~~~~~~~~ vim +/shmem_lock +4096 mm/shmem.c 853ac43ab194f5 Matt Mackall 2009-01-06 4095 3f96b79ad96263 Hugh Dickins 2009-09-21 @4096 int shmem_lock(struct file *file, int lock, struct user_struct *user) 3f96b79ad96263 Hugh Dickins 2009-09-21 4097 { 3f96b79ad96263 Hugh Dickins 2009-09-21 4098 return 0; 3f96b79ad96263 Hugh Dickins 2009-09-21 4099 } 3f96b79ad96263 Hugh Dickins 2009-09-21 4100 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org