diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 8e36a0feec09..eb9bbf12c8d8 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -887,7 +887,7 @@ static int join(struct mddev *mddev, int nodes)
 	memset(str, 0, 64);
 	sprintf(str, "%pU", mddev->uuid);
 	ret = dlm_new_lockspace(str, mddev->bitmap_info.cluster_name,
-				0, LVB_SIZE, &md_ls_ops, mddev,
+				DLM_LSFL_SOFTIRQ, LVB_SIZE, &md_ls_ops, mddev,
 				&ops_rv, &cinfo->lockspace);
 	if (ret)
 		goto err;