Partitions and end-to-end protection

[Christoph Hellwig]

On Tue, Jul 14, 2015 at 02:41:43PM -0400, Martin K. Petersen wrote:
> >>>>> "Christoph" == Christoph Hellwig <hch at infradead.org> writes:
> 
> >> The driver did it this way because we need a disk allocated before we
> >> can subscribe to block integrity extensions.
> 
> The gendisk is a prerequisite by virtue of the integrity profile hanging
> off of it.

Having one allocated is.  But why do we need to have it added (at which
point it is live)?