tree: https://github.com/0day-ci/linux/commits/UPDATE-20210219-010806/Nicolas-B... head: eb3e4dcf8c9517d75bf08c3a0c9ab261aa0d80be commit: 2afc37ff212816967e750b487478bab6611db52f proc: Add FS_GENERATED_CONTENT to filesystem flags date: 4 hours ago config: ia64-randconfig-r013-20210218 (attached as .config) compiler: ia64-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/2afc37ff212816967e750b487478bab66... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210219-010806/Nicolas-Boichat/Add-generated-flag-to-filesystem-struct-to-block-copy_file_range/20210212-124814 git checkout 2afc37ff212816967e750b487478bab6611db52f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 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 >>): In file included from arch/ia64/include/asm/pgtable.h:154, from include/linux/pgtable.h:6, from arch/ia64/include/asm/uaccess.h:40, from include/linux/uaccess.h:11, from fs/proc/root.c:10: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:127:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 127 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ fs/proc/root.c: At top level: 285 | .fs_flags = FS_USERNS_MOUNT | FS_DISALLOW_NOTIFY_PERM | FS_GENERATED_CONTENT, | ^~~~~~~~~~~~~~~~~~~~ vim +/FS_GENERATED_CONTENT +285 fs/proc/root.c 279 280 static struct file_system_type proc_fs_type = { 281 .name = "proc", 282 .init_fs_context = proc_init_fs_context, 283 .parameters = proc_fs_parameters, 284 .kill_sb = proc_kill_sb, 286 }; 287 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org