[PATCH 1/5] block: add async variant of blkdev_issue_zeroout

[Christoph Hellwig]

On Tue, Nov 15, 2016 at 10:50:35PM -0800, Chaitanya Kulkarni wrote:
> Similar to __blkdev_issue_discard this variant allows submitting
> the final bio asynchronously and chaining multiple ranges
> into a single completion.
> 
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni at hgst.com>

Looks fine,

Reviewed-by: Christoph Hellwig <hch at lst.de>