[PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk

[Christoph Hellwig]

On Sat, Jan 22, 2022 at 07:10:51PM +0800, Ming Lei wrote:
> Add one helper of disk_release_queue for releasing queue data for disk.

Please explain what "queue data for disk" is, and why this helper is
useful.  Right now it seems to just move a few things around without a
rationale or explanation of why it is safe.