Hi Johannes, I love your patch! Yet something to improve: [auto build test ERROR on v5.8-rc5] [cannot apply to kdave/for-next btrfs/next next-20200713] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Johannes-Thumshirn/Two-furhter-a... base: 11ba468877bb23f28956a35e896356252d63c983 config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 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 ./usr/include/linux/btrfs_tree.h:5, from <command-line>:32: 35 | static_assert(sizeof(struct btrfs_ioctl_vol_args) == 4096); | ^~~~~~ ./usr/include/linux/btrfs.h:192:15: error: expected declaration specifiers or '...' before 'sizeof' 192 | static_assert(sizeof(struct btrfs_ioctl_scrub_args) == 1024); | ^~~~~~ ./usr/include/linux/btrfs.h:245:15: error: expected declaration specifiers or '...' before 'sizeof' 245 | static_assert(sizeof(struct btrfs_ioctl_dev_info_args) == 4096); | ^~~~~~ ./usr/include/linux/btrfs.h:274:15: error: expected declaration specifiers or '...' before 'sizeof' 274 | static_assert(sizeof(struct btrfs_ioctl_fs_info_args) == 1024); | ^~~~~~ ./usr/include/linux/btrfs.h:457:15: error: expected declaration specifiers or '...' before 'sizeof' 457 | static_assert(sizeof(struct btrfs_ioctl_balance_args) == 1024); | ^~~~~~ ./usr/include/linux/btrfs.h:465:15: error: expected declaration specifiers or '...' before 'sizeof' 465 | static_assert(sizeof(struct btrfs_ioctl_ino_lookup_args) == 4096); | ^~~~~~ ./usr/include/linux/btrfs.h:481:15: error: expected declaration specifiers or '...' before 'sizeof' 481 | static_assert(sizeof(struct btrfs_ioctl_ino_lookup_user_args) == 4096); | ^~~~~~ ./usr/include/linux/btrfs.h:560:15: error: expected declaration specifiers or '...' before 'sizeof' 560 | static_assert(sizeof(struct btrfs_ioctl_search_args) == 4096); | ^~~~~~ ./usr/include/linux/btrfs.h:718:15: error: expected declaration specifiers or '...' before 'sizeof' 718 | static_assert(sizeof(struct btrfs_ioctl_get_dev_stats) == 1032); | ^~~~~~ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org