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block, drivers: add REQ_OP_FLUSH operation

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This adds a REQ_OP_FLUSH operation that is sent to request_fn
based drivers by the block layer's flush code, instead of
sending requests with the request->cmd_flags REQ_FLUSH bit set.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Mike Christie
2016-06-05 14:32:23 -05:00
committed by Jens Axboe
parent 4e1b2d52a8
commit 3a5e02ced1
20 changed files with 40 additions and 31 deletions
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2
drivers/mtd/mtd_blkdevs.c
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@@ -87,7 +87,7 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
if (req->cmd_type != REQ_TYPE_FS)
return -EIO;
if (req->cmd_flags & REQ_FLUSH)
if (req_op(req) == REQ_OP_FLUSH)
return tr->flush(dev);
if (blk_rq_pos(req) + blk_rq_cur_sectors(req) >