Hi Josh, I love your patch! Yet something to improve: [auto build test ERROR on tytso-ext4/dev] [also build test ERROR on linus/master v6.3-rc4 next-20230331] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Josh-Triplett/ext4-Add-a-uapi-header-for-ext4-userspace-APIs/20230331-224557 base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev patch link: https://lore.kernel.org/r/152752fa6b148e0ea304a3cdb3cc33bae0117918.1680272908.git.josh%40joshtriplett.org patch subject: [PATCH v2] ext4: Add a uapi header for ext4 userspace APIs config: x86_64-randconfig-a004 (https://download.01.org/0day-ci/archive/20230401/202304010437.q1ttcwK7-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/50d05266bcf4bc3307776d25c0f70d11063a8a4e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Josh-Triplett/ext4-Add-a-uapi-header-for-ext4-userspace-APIs/20230331-224557 git checkout 50d05266bcf4bc3307776d25c0f70d11063a8a4e # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304010437.q1ttcwK7-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from <command-line>: >> ./usr/include/linux/ext4.h:113:9: error: unknown type name 'compat_u64' 113 | compat_u64 block_bitmap; | ^~~~~~~~~~ ./usr/include/linux/ext4.h:114:9: error: unknown type name 'compat_u64' 114 | compat_u64 inode_bitmap; | ^~~~~~~~~~ ./usr/include/linux/ext4.h:115:9: error: unknown type name 'compat_u64' 115 | compat_u64 inode_table; | ^~~~~~~~~~ -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests