[LTP] [PATCH v3] syscalls/ioctl_loop05: Use correct blockdev to get logical_block_size

[Yang Xu]

Hi Jan

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> 
> ----- Original Message -----
>> Using inode block size is also wrong because it is for filesystem io(such as
>> we format
>> filesystem can specify block size for data or log or metadata), it is not
>> suitable
>> for logical block size.
> 
> If this copes correctly with btrfs too, I don't have objections.
For btrfs, I think it is also right.
> I retested on failing s390 setup and v3 works there OK.
Thanks for your retest.

Best Regards
Yang Xu
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