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Subject[djwong-xfs:zero-initialize-pmem-5.16 18/28] fs/xfs/libxfs/xfs_ialloc_btree.c:552:53: sparse: sparse: cast truncates bits from constant value (100000000 becomes 0)
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git zero-initialize-pmem-5.16
head: 34b80c3d1203abd5fd64242ef25898c7d64166ca
commit: c0ef00d1e835bfd24399aaa069b2b608dd60b485 [18/28] xfs: check absolute maximum nlevels for each btree type
config: csky-randconfig-s032-20211008 (attached as .config)
compiler: csky-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/commit/?id=c0ef00d1e835bfd24399aaa069b2b608dd60b485
git remote add djwong-xfs https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git
git fetch --no-tags djwong-xfs zero-initialize-pmem-5.16
git checkout c0ef00d1e835bfd24399aaa069b2b608dd60b485
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=csky SHELL=/bin/bash fs/xfs/ mm/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
fs/xfs/libxfs/xfs_ialloc_btree.c: note: in included file (through include/linux/bitops.h, include/linux/kernel.h, include/linux/list.h, ...):
arch/csky/include/asm/bitops.h:77:9: sparse: sparse: preprocessor token __clear_bit redefined
fs/xfs/libxfs/xfs_ialloc_btree.c: note: in included file (through arch/csky/include/asm/bitops.h, include/linux/bitops.h, include/linux/kernel.h, ...):
include/asm-generic/bitops/non-atomic.h:34:9: sparse: this was the original definition
>> fs/xfs/libxfs/xfs_ialloc_btree.c:552:53: sparse: sparse: cast truncates bits from constant value (100000000 becomes 0)

vim +552 fs/xfs/libxfs/xfs_ialloc_btree.c

543
544 unsigned int
545 xfs_inobt_absolute_maxlevels(void)
546 {
547 unsigned int minrecs[2];
548
549 xfs_btree_absolute_minrecs(minrecs, 0, sizeof(xfs_inobt_rec_t),
550 sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
551
> 552 return xfs_btree_compute_maxlevels(minrecs, XFS_MAX_AG_INODES);
553 }
554

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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