cleanup updating the size of block devices v3

Christoph Hellwig
2020-11-16T14:58:26Z

Hi Jens,

this series builds on top of the work that went into the last merge window,
and make sure we have a single coherent interfac for updating the size of a
block device.

Changes since v2:
- rebased to the set_capacity_revalidate_and_notify in mainline
- keep the loop_set_size function
- fix two mixed up acks

Changes since v1:
- minor spelling fixes