Don't insert before existing chunk into the hash.

Snapshot merging couldn't handle it. And this code is used very rarely anyway
(most inserts are after existing extent, not before).

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 drivers/md/dm-snap.c |   10 ----------
 1 file changed, 10 deletions(-)

Index: linux-2.6.28-rc5-devel/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.28-rc5-devel.orig/drivers/md/dm-snap.c	2008-11-25 16:10:58.000000000 +0100
+++ linux-2.6.28-rc5-devel/drivers/md/dm-snap.c	2008-11-25 16:11:03.000000000 +0100
@@ -405,16 +405,6 @@ static void insert_completed_exception(s
 			return;
 		}
 
-		/* Insert before an existing chunk? */
-		if (new_e->old_chunk == (e->old_chunk - 1) &&
-		    new_e->new_chunk == (dm_chunk_number(e->new_chunk) - 1)) {
-			dm_consecutive_chunk_count_inc(e);
-			e->old_chunk--;
-			e->new_chunk--;
-			free_exception(new_e);
-			return;
-		}
-
 		if (new_e->old_chunk > e->old_chunk)
 			break;
 	}