From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Stancek <jstancek@redhat.com>
Date: Thu, 11 Jun 2020 07:09:20 -0400 (EDT)
Subject: [LTP] [PATCH v3] syscalls/ioctl_loop05: Use correct blockdev to
 get logical_block_size
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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.
I retested on failing s390 setup and v3 works there OK.