Hi "Enrico, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on kdave/for-next] [also build test ERROR on linux/master linus/master v5.13-rc7] [cannot apply to ext4/dev next-20210622] [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/Enrico-Weigelt-metux-IT-consult/... base: https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next config: m68k-randconfig-s031-20210622 (attached as .config) compiler: m68k-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: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/1239d457c0b015846b187f9b31460e638... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Enrico-Weigelt-metux-IT-consult/fs-generic-file-operation-for-fstrim/20210622-211217 git checkout 1239d457c0b015846b187f9b31460e638301a395 # 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__' W=1 ARCH=m68k 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 >>): 10652 | .fitrim = btrfs_ioctl_fitrim, | ^~~~~~ | fstrim 10652 | .fitrim = btrfs_ioctl_fitrim, | ^~~~~~~~~~~~~~~~~~ fs/btrfs/inode.c:10652:13: note: (near initialization for 'btrfs_dir_file_operations') fs/btrfs/inode.c:10652:13: note: (near initialization for 'btrfs_dir_file_operations.fasync') cc1: some warnings being treated as errors vim +10652 fs/btrfs/inode.c 10640 10641 static const struct file_operations btrfs_dir_file_operations = { 10642 .llseek = generic_file_llseek, 10643 .read = generic_read_dir, 10644 .iterate_shared = btrfs_real_readdir, 10645 .open = btrfs_opendir, 10646 .unlocked_ioctl = btrfs_ioctl, 10647 #ifdef CONFIG_COMPAT 10648 .compat_ioctl = btrfs_compat_ioctl, 10649 #endif 10650 .release = btrfs_release_file, 10651 .fsync = btrfs_sync_file, 10652 .fitrim = btrfs_ioctl_fitrim, 10653 }; 10654 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org