BTRFS_FS_CREATING_FREE_SPACE_TREE
if (test_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags))
set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);