Hi Dave, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on xfs-linux/for-next] [also build test WARNING on next-20220429] [cannot apply to v5.18-rc5] [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/intel-lab-lkp/linux/commits/Dave-Chinner/xfs-fix-random-format-verification-issues/20220502-162206 base: https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git for-next config: s390-randconfig-r032-20220501 (https://download.01.org/0day-ci/archive/20220502/202205022014.DmgdkxxR-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 09325d36061e42b495d1f4c7e933e260eac260ed) 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 # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/701c0cd0bdea877a997898941f62df6c05045f40 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Dave-Chinner/xfs-fix-random-format-verification-issues/20220502-162206 git checkout 701c0cd0bdea877a997898941f62df6c05045f40 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash fs/xfs/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/xfs/libxfs/xfs_sb.c:37:1: warning: no previous prototype for function 'xfs_sb_validate_v5_features' [-Wmissing-prototypes] xfs_sb_validate_v5_features( ^ fs/xfs/libxfs/xfs_sb.c:36:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool ^ static 1 warning generated. vim +/xfs_sb_validate_v5_features +37 fs/xfs/libxfs/xfs_sb.c 28 29 /* 30 * Physical superblock buffer manipulations. Shared with libxfs in userspace. 31 */ 32 33 /* 34 * Validate all the compulsory V4 feature bits are set on a V5 filesystem. 35 */ 36 bool > 37 xfs_sb_validate_v5_features( 38 struct xfs_sb *sbp) 39 { 40 /* We must not have any unknown V4 feature bits set */ 41 if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) 42 return false; 43 44 /* 45 * The CRC bit is considered an invalid V4 flag, so we have to add it 46 * manually to the OKBITS mask. 47 */ 48 if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS | 49 XFS_SB_VERSION2_CRCBIT)) 50 return false; 51 52 /* Now check all the required V4 feature flags are set. */ 53 -- 0-DAY CI Kernel Test Service https://01.org/lkp