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authorKiyoshi Ueda <k-ueda@ct.jp.nec.com>2009-12-11 02:52:14 +0300
committerAlasdair G Kergon <agk@redhat.com>2009-12-11 02:52:14 +0300
commit598de40947909e6b948569710383661ecc0ddc8e (patch)
tree05d342fb20877b9c8944ba9309f46f62094ef021 /drivers/md/dm.c
parent90abb8c4cec8f0aa4ce58790542e3cf13071601a (diff)
downloadlinux-598de40947909e6b948569710383661ecc0ddc8e.tar.xz
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: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 73b89afd6565..cf0b455b21ef 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -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);
}