[Drbd-dev] remove REQ_OP_WRITE_SAME v2

[Martin K. Petersen]

Christoph,

> There is a minor conflict because the __blkdev_issue_write_same
> function removed by this series is affected by the blk_next_bio calling
> convention change in the block tree, but the fixup is trivial.
>
> Martin: do you want to fix that up when applying, or do you want me
> to resend?  If you have your discard rework ready you can also send
> that now and I'll rebase on top of that.

I'll fix it up when applying. Will get this queued up tomorrow.

-- 
Martin K. Petersen	Oracle Linux Engineering