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Commit 598de409 authored by Kiyoshi Ueda's avatar Kiyoshi Ueda Committed by Alasdair G Kergon
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dm: use clone in map_request function 



This patch changes the argument of map_request() to clone request
from original request.  No functional change.

This patch is a preparation for PATCH 9, which needs to use
map_request() for clones sharing an original barrier request.

Signed-off-by: default avatarKiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: default avatarJun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 90abb8c4

drivers/md/dm.c

+2 −3
Original line number Diff line number Diff line
@@ -1495,11 +1495,10 @@ static int dm_prep_fn(struct request_queue *q, struct request *rq) 
	return BLKPREP_OK;

}



static void map_request(struct dm_target *ti, struct request *rq,

static void map_request(struct dm_target *ti, struct request *clone,

			struct mapped_device *md)

{

	int r;

	struct request *clone = rq->special;

	struct dm_rq_target_io *tio = clone->end_io_data;



	/*
@@ -1576,7 +1575,7 @@ static void dm_request_fn(struct request_queue *q) 


		blk_start_request(rq);

		spin_unlock(q->queue_lock);

		map_request(ti, rq, md);

		map_request(ti, rq->special, md);

		spin_lock_irq(q->queue_lock);

	}