Re: [PATCH 09/22] dm-crypt: Make use of the new sg_map helper in 4 call sites

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To: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Subject: Re: [PATCH 09/22] dm-crypt: Make use of the new sg_map helper in 4 call sites
From: Christoph Hellwig <hch@xxxxxx>
Date: Fri, 14 Apr 2017 10:39:21 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>, Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>, Sumit Semwal <sumit.semwal@xxxxxxxxxx>, Ming Lin <ming.l@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, linux-media@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linaro-mm-sig@xxxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-mmc@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-nvdimm@xxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, fcoe-devel@xxxxxxxxxxxxx, open-iscsi@xxxxxxxxxxxxxxxx, megaraidlinux.pdl@xxxxxxxxxxxx, sparmaintainer@xxxxxxxxxx, devel@xxxxxxxxxxxxxxxxxxxx, target-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, rds-devel@xxxxxxxxxxxxxx, Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>, Stephen Bates <sbates@xxxxxxxxxxxx>
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On Thu, Apr 13, 2017 at 04:05:22PM -0600, Logan Gunthorpe wrote:
> Very straightforward conversion to the new function in all four spots.

I think the right fix here is to switch dm-crypt to the ahash API
that takes a scatterlist.
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References:
- [PATCH 00/22] Introduce common scatterlist map function
  - From: Logan Gunthorpe
- [PATCH 09/22] dm-crypt: Make use of the new sg_map helper in 4 call sites
  - From: Logan Gunthorpe

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