Add data_offset arg to ->init_super and use it in super1.c

So if ->data_offset is already set, use that rather than
computing one.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/mdadm.h b/mdadm.h
index 04e7d0fc..425cac39 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -726,7 +726,8 @@ extern struct superswitch {
 	 */
 	int (*init_super)(struct supertype *st, mdu_array_info_t *info,
 			  unsigned long long size, char *name,
-			  char *homehost, int *uuid);
+			  char *homehost, int *uuid,
+			  unsigned long long data_offset);
 
 	/* update the metadata to include new device, either at create or
 	 * when hot-adding a spare.