Partitions and end-to-end protection

[Christoph Hellwig]

On Tue, Jul 14, 2015 at 11:13:18AM -0700, Dan Williams wrote:
> We got bit by this in the nvdimm enabling as well, it is mostly hidden
> by the fact that sd triggers revalidate_disk() by default.

But that's just revalidate_disk, which shouldn't be require but isn't
too mad.  blkdev_reread_part and the setup work for it is a totally
different league.