tree:   https://github.com/kdave/btrfs-devel.git misc-next
head:   18f0c5bda0dd67dedb8df3d7faf856dffa8f78d3
commit: 770a7b4f5bd01ee953b538064068e814285df79b [147/154] btrfs: zoned: implement active zone tracking
config: x86_64-randconfig-a005-20210827 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1076082a0d97bd5c16a25ee7cf3dbb6ee4b5a9fe)
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
        # https://github.com/kdave/btrfs-devel/commit/770a7b4f5bd01ee953b538064068e814285df79b
        git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git
        git fetch --no-tags kdave-btrfs-devel misc-next
        git checkout 770a7b4f5bd01ee953b538064068e814285df79b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> fs/btrfs/zoned.c:1697: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Activate block group and underlying device zones


vim +1697 fs/btrfs/zoned.c

  1695	
  1696	/**
> 1697	 * Activate block group and underlying device zones
  1698	 *
  1699	 * @block_group: the block group to activate
  1700	 *
  1701	 * Return: true on success, false otherwise
  1702	 */
  1703	bool btrfs_zone_activate(struct btrfs_block_group *block_group)
  1704	{
  1705		struct btrfs_fs_info *fs_info = block_group->fs_info;
  1706		struct map_lookup *map;
  1707		struct btrfs_device *device;
  1708		u64 physical;
  1709		bool ret;
  1710	
  1711		if (!btrfs_is_zoned(block_group->fs_info))
  1712			return true;
  1713	
  1714		map = block_group->physical_map;
  1715		/* Currently support SINGLE profile only */
  1716		ASSERT(map->num_stripes == 1);
  1717		device = map->stripes[0].dev;
  1718		physical = map->stripes[0].physical;
  1719	
  1720		if (device->zone_info->max_active_zones == 0)
  1721			return true;
  1722	
  1723		spin_lock(&block_group->lock);
  1724	
  1725		if (block_group->zone_is_active) {
  1726			ret = true;
  1727			goto out_unlock;
  1728		}
  1729	
  1730		/* No space left */
  1731		if (block_group->alloc_offset == block_group->zone_capacity) {
  1732			ret = false;
  1733			goto out_unlock;
  1734		}
  1735	
  1736		if (!btrfs_dev_set_active_zone(device, physical)) {
  1737			/* Cannot activate the zone */
  1738			ret = false;
  1739			goto out_unlock;
  1740		}
  1741	
  1742		/* Successfully activated all the zones */
  1743		block_group->zone_is_active = 1;
  1744	
  1745		spin_unlock(&block_group->lock);
  1746	
  1747		/* For the active block group list */
  1748		btrfs_get_block_group(block_group);
  1749	
  1750		spin_lock(&fs_info->zone_active_bgs_lock);
  1751		ASSERT(list_empty(&block_group->active_bg_list));
  1752		list_add_tail(&block_group->active_bg_list, &fs_info->zone_active_bgs);
  1753		spin_unlock(&fs_info->zone_active_bgs_lock);
  1754	
  1755		return true;
  1756	
  1757	out_unlock:
  1758		spin_unlock(&block_group->lock);
  1759		return ret;
  1760	}
  1761	

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