[kbuild-all] [djwong-xfs:defrag-freespace 309/310] fs/xfs/libxfs/xfs_bmap.c:6611:25: warning: variable 'rtxlen_out' is uninitialized when used here

tree: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git defrag-freespace head: eac62500d5481c286ef5fac0873d1707175312b6 commit: e17e75a18c97e1f807f4e82707349ffa38c94fa3 [309/310] xfs: fallocate free space into a file config: mips-randconfig-r004-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 2c6448cdc2f68f8c28fd0bd9404182b81306e6e6) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/comm... git remote add djwong-xfs https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git git fetch --no-tags djwong-xfs defrag-freespace git checkout e17e75a18c97e1f807f4e82707349ffa38c94fa3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): fs/xfs/libxfs/xfs_bmap.c:6593:16: warning: variable 'rtxlen_in' set but not used [-Wunused-but-set-variable] xfs_extlen_t rtxlen_in, rtxlen_out; ^ mval->br_blockcount = rtxlen_out * mp->m_sb.sb_rextsize; ^~~~~~~~~~ fs/xfs/libxfs/xfs_bmap.c:6593:37: note: initialize the variable 'rtxlen_out' to silence this warning xfs_extlen_t rtxlen_in, rtxlen_out; ^ = 0 if (rtx_out == NULLRTBLOCK) ^~~~~~~ fs/xfs/libxfs/xfs_bmap.c:6592:32: note: initialize the variable 'rtx_out' to silence this warning xfs_rtblock_t rtx_in, rtx_out; ^ = 0 3 warnings generated. vim +/rtxlen_out +6611 fs/xfs/libxfs/xfs_bmap.c 6541 6542 /* 6543 * Given a file and a free physical extent, map it into the file at the same 6544 * offset if the file were a sparse image of the physical device. Set @mval to 6545 * whatever mapping we added to the file. 6546 */ 6547 int 6548 xfs_bmapi_freesp( 6549 struct xfs_trans **tpp, 6550 struct xfs_inode *ip, 6551 xfs_fsblock_t fsbno, 6552 xfs_extlen_t len, 6553 struct xfs_bmbt_irec *mval) 6554 { 6555 struct xfs_bmbt_irec irec; 6556 struct xfs_mount *mp = ip->i_mount; 6557 xfs_fileoff_t startoff; 6558 bool isrt = XFS_IS_REALTIME_INODE(ip); 6559 int nimaps; 6560 int error; 6561 6562 trace_xfs_bmapi_freesp(ip, fsbno, len); 6563 6564 error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, 6565 XFS_IEXT_ADD_NOSPLIT_CNT); 6566 if (error) 6567 return error; 6568 6569 if (isrt) 6570 startoff = fsbno; 6571 else 6572 startoff = xfs_fsblock_to_fileoff(mp, fsbno); 6573 6574 /* Make sure the entire range is a hole. */ 6575 nimaps = 1; 6576 error = xfs_bmapi_read(ip, startoff, len, &irec, &nimaps, 0); 6577 if (error) 6578 return error; 6579 6580 if (irec.br_startoff != startoff || 6581 irec.br_startblock != HOLESTARTBLOCK || 6582 irec.br_blockcount < len) 6583 return -EINVAL; 6584 6585 /* 6586 * Allocate the physical extent. We should not have dropped the lock 6587 * since the scan of the free space metadata, so this should work, 6588 * though the length may be adjusted to play nicely with metadata space 6589 * reservations. 6590 */ 6591 if (isrt) { 6592 xfs_rtblock_t rtx_in, rtx_out; 6594 uint32_t mod; 6595 6596 rtx_in = div_u64_rem(fsbno, mp->m_sb.sb_rextsize, &mod); 6597 ASSERT(mod == 0); 6598 rtxlen_in = len / mp->m_sb.sb_rextsize; 6599 ASSERT(len % mp->m_sb.sb_rextsize == 0); 6600 6601 error = xfs_rtallocate_extent(*tpp, rtx_in, 1, rtxlen_in, 6602 &rtxlen_out, 0, 1, &rtx_out); 6603 if (error) 6604 return error; 6606 return -ENOSPC; 6607 if (rtx_out != rtx_in) { 6608 ASSERT(0); 6609 return -EFSCORRUPTED; 6610 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org