disk revalidation cleanups and fixlets v2

Christoph Hellwig
2019-11-14T14:34:42Z

Hi Jens and Jan,

this series takes the disk size change detection and revalidations
from Jan a step further and fully integrate the code path for
partitioned vs non-partitioned devices. It also fixes up a few
bits where we have unintentionally differing behavior.

Changes since v1:
- rebased on to of for-5.5/zoned
- fixed a commit message
- added two new trivial patches