md/raid1: add takeover support for raid5->raid1
A 2-device raid5 array can now be converted to raid1.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h
index e87b84d..5f2d443 100644
--- a/drivers/md/raid1.h
+++ b/drivers/md/raid1.h
@@ -59,6 +59,11 @@
mempool_t *r1bio_pool;
mempool_t *r1buf_pool;
+
+ /* When taking over an array from a different personality, we store
+ * the new thread here until we fully activate the array.
+ */
+ struct mdk_thread_s *thread;
};
typedef struct r1_private_data_s conf_t;