[Drbd-dev] always use REQ_OP_WRITE_ZEROES for zeroing offload V2

[Jens Axboe]

On Wed, Apr 05 2017, Christoph Hellwig wrote:
> This series makes REQ_OP_WRITE_ZEROES the only zeroing offload
> supported by the block layer, and switches existing implementations
> of REQ_OP_DISCARD that correctly set discard_zeroes_data to it,
> removes incorrect discard_zeroes_data, and also switches WRITE SAME
> based zeroing in SCSI to this new method.
> 
> The series is against the block for-next tree.

Added for 4.12, thanks Christoph.

-- 
Jens Axboe