BTRFS_FS_CLOSING_DONE
ASSERT(test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags));
set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);
if (btrfs_fs_closing(fs_info) && test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))