1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
index 59cd1efb8d30..2316ac2e8e21 100644
--- a/drivers/md/raid10.h
+++ b/drivers/md/raid10.h
@@ -33,6 +33,8 @@ struct r10_private_data_s {
                                                * 1 stripe.
                                                */
 
+        sector_t                dev_sectors;  /* temp copy of mddev->dev_sectors */
+
         int chunk_shift; /* shift from chunks to sectors */
         sector_t chunk_mask;
 
@@ -57,6 +59,11 @@ struct r10_private_data_s {
         mempool_t *r10bio_pool;
         mempool_t *r10buf_pool;
         struct page             *tmppage;
+
+        /* 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 r10_private_data_s conf_t;