Hi Song, I love your patch! Perhaps something to improve: [auto build test WARNING on dm/for-next] [also build test WARNING on linux/master linus/master v5.10-rc7 next-20201209] [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/0day-ci/linux/commits/Song-Liu/Revert-dm-raid-remove-unnecessary-discard-limits-for-raid10/20201210-060948 base: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next config: x86_64-randconfig-s022-20201210 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-179-ga00755aa-dirty # https://github.com/0day-ci/linux/commit/c041d7bf65519d8a09a4193a0963fdcadcfd639b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Song-Liu/Revert-dm-raid-remove-unnecessary-discard-limits-for-raid10/20201210-060948 git checkout c041d7bf65519d8a09a4193a0963fdcadcfd639b # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> "sparse warnings: (new ones prefixed by >>)" >> drivers/md/dm-raid.c:3739:47: sparse: sparse: incompatible types in comparison expression (different signedness): >> drivers/md/dm-raid.c:3739:47: sparse: int * >> drivers/md/dm-raid.c:3739:47: sparse: unsigned int * vim +3739 drivers/md/dm-raid.c 3723 3724 static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) 3725 { 3726 struct raid_set *rs = ti->private; 3727 unsigned int chunk_size_bytes = to_bytes(rs->md.chunk_sectors); 3728 3729 blk_limits_io_min(limits, chunk_size_bytes); 3730 blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs)); 3731 3732 /* 3733 * RAID10 personality requires bio splitting, 3734 * RAID0/1/4/5/6 don't and process large discard bios properly. 3735 */ 3736 if (rs_is_raid10(rs)) { 3737 limits->discard_granularity = max(chunk_size_bytes, 3738 limits->discard_granularity); > 3739 limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors, 3740 limits->max_discard_sectors); 3741 } 3742 } 3743 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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