On 2018/12/26 下午1:37, Kangjie Lu wrote:
> In case sysfs_create_group fails, let's check its return value and
> issues an error message.
> 
> Signed-off-by: Kangjie Lu <kjlu@umn.edu>
> ---
>  fs/btrfs/sysfs.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
> index 3717c864ba23..24ef416e700b 100644
> --- a/fs/btrfs/sysfs.c
> +++ b/fs/btrfs/sysfs.c
> @@ -889,6 +889,8 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
>  	 */
>  	sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
>  	ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
> +	if (ret)
> +		btrfs_err(fs_info, "failed to create btrfs_feature_attr_group.\n");

Forgot to mention, for btrfs_* infrastructure, no need for the ending '\n'.

Despite that, looks good.

Reviewed-by: Qu Wenruo <wqu@suse.com>

Thanks,
Qu

>  }
>  
>  static int btrfs_init_debugfs(void)
>