Messages in this thread | | | Date | Mon, 8 Nov 2021 01:03:23 +0800 | From | kernel test robot <> | Subject | [allisonhenderson-xfs-work:pptrs_restart129 31/37] include/linux/mman.h:158:9: warning: division by zero is undefined |
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tree: https://github.com/allisonhenderson/xfs_work.git pptrs_restart129 head: f0a0e96bd7e03c467041931dc1b9663111f1d365 commit: 72e3522333e0467ce3829aa51dcaaaa8e828b3ab [31/37] xfs: Add helper function xfs_attr_list_context_init config: mips-buildonly-randconfig-r004-20211014 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6c76d0101193aa4eb891a6954ff047eda2f9cf71) 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://github.com/allisonhenderson/xfs_work/commit/72e3522333e0467ce3829aa51dcaaaa8e828b3ab git remote add allisonhenderson-xfs-work https://github.com/allisonhenderson/xfs_work.git git fetch --no-tags allisonhenderson-xfs-work pptrs_restart129 git checkout 72e3522333e0467ce3829aa51dcaaaa8e828b3ab # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from fs/xfs/xfs_file.c:20: fs/xfs/libxfs/xfs_attr.h:33:21: error: no member named 'larp' in 'struct xfs_globals' return xfs_globals.larp; ~~~~~~~~~~~ ^ In file included from fs/xfs/xfs_file.c:31: >> include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero] _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mman.h:134:48: note: expanded from macro '_calc_vm_trans' ((bit1) <= (bit2) ? ((x) & (bit1)) * ((bit2) / (bit1)) \ ^ ~~~~~~ >> include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero] _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mman.h:135:21: note: expanded from macro '_calc_vm_trans' : ((x) & (bit1)) / ((bit1) / (bit2)))) ^ ~~~~~~~~~~~~~~~~~ 2 warnings and 1 error generated.
vim +158 include/linux/mman.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 148 ^1da177e4c3f41 Linus Torvalds 2005-04-16 149 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 150 * Combine the mmap "flags" argument into "vm_flags" used internally. ^1da177e4c3f41 Linus Torvalds 2005-04-16 151 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 152 static inline unsigned long ^1da177e4c3f41 Linus Torvalds 2005-04-16 153 calc_vm_flag_bits(unsigned long flags) ^1da177e4c3f41 Linus Torvalds 2005-04-16 154 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 155 return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) | ^1da177e4c3f41 Linus Torvalds 2005-04-16 156 _calc_vm_trans(flags, MAP_DENYWRITE, VM_DENYWRITE ) | b6fb293f2497a9 Jan Kara 2017-11-01 157 _calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) | b3fbbea4c00220 Kevin Brodsky 2019-11-25 @158 _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) | b3fbbea4c00220 Kevin Brodsky 2019-11-25 159 arch_calc_vm_flag_bits(flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 160 } 00619bcc44d6b7 Jerome Marchand 2013-11-12 161
:::::: The code at line 158 was first introduced by commit :::::: b3fbbea4c00220f62e6f7e2514466e6ee81f7f60 mm: Introduce arch_calc_vm_flag_bits()
:::::: TO: Kevin Brodsky <Kevin.Brodsky@arm.com> :::::: CC: Catalin Marinas <catalin.marinas@arm.com>
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