From: Martin K. Petersen <martin.petersen@oracle.com>

When a bio gets split, mark its fragments with the BIO_CLONED flag.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
 drivers/md/dm.c |    1 +
 1 files changed, 1 insertion(+)

Index: linux-2.6.27/drivers/md/dm.c
===================================================================
--- linux-2.6.27.orig/drivers/md/dm.c	2008-10-21 17:32:24.000000000 +0100
+++ linux-2.6.27/drivers/md/dm.c	2008-10-21 17:33:52.000000000 +0100
@@ -669,6 +669,7 @@ static struct bio *split_bvec(struct bio
 	clone->bi_size = to_bytes(len);
 	clone->bi_io_vec->bv_offset = offset;
 	clone->bi_io_vec->bv_len = clone->bi_size;
+	clone->bi_flags |= 1 << BIO_CLONED;
 
 	return clone;
 }