Re: [PATCH 4/6] btrfs: periodic block_group reclaim

[kernel test robot <lkp@intel.com>]

Hi Boris,

kernel test robot noticed the following build warnings:

[auto build test WARNING on kdave/for-next]
[also build test WARNING on linus/master v6.8-rc2 next-20240202]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Boris-Burkov/btrfs-report-reclaim-count-in-sysfs/20240203-071516
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
patch link:    https://lore.kernel.org/r/1173e535ec7b46bda33ed2dc4219027502763902.1706914865.git.boris%40bur.io
patch subject: [PATCH 4/6] btrfs: periodic block_group reclaim
config: i386-randconfig-141-20240204 (https://download.01.org/0day-ci/archive/20240205/202402050244.pa6hJds3-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402050244.pa6hJds3-lkp@intel.com/

smatch warnings:
fs/btrfs/space-info.c:1996 btrfs_reclaim_sweep() error: uninitialized symbol 'ret'.

vim +/ret +1996 fs/btrfs/space-info.c

  1977	
  1978	int btrfs_reclaim_sweep(struct btrfs_fs_info *fs_info)
  1979	{
  1980		int ret;
  1981		int raid;
  1982		struct btrfs_space_info *space_info;
  1983	
  1984		list_for_each_entry(space_info, &fs_info->space_info, list) {
  1985			if (space_info->flags & BTRFS_BLOCK_GROUP_SYSTEM)
  1986				continue;
  1987			if (!READ_ONCE(space_info->periodic_reclaim))
  1988				continue;
  1989			for (raid = 0; raid < BTRFS_NR_RAID_TYPES; raid++) {
  1990				ret = do_reclaim_sweep(fs_info, space_info, raid);
  1991				if (ret)
  1992					return ret;
  1993			}
  1994		}
  1995	
> 1996		return ret;

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