IB/iwcm: Remove deprecated create_singlethread_workqueue

alloc_ordered_workqueue() with WQ_MEM_RECLAIM set, replaces
deprecated create_singlethread_workqueue(). This is the identity
conversion.

The workqueue "iwcm_wq" queues work item &work(maps to cm_work_handler).
It has been identity converted.

WQ_MEM_RECLAIM has been set to ensure forward progress under
memory pressure.

Signed-off-by: Bhaktipriya Shridhar <[email protected]>
Reviewed-by: Steve Wise <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

drivers/infiniband/core/iwcm.c

@@ -1160,7 +1160,7 @@ static int __init iw_cm_init(void)
 	if (ret)
 		pr_err("iw_cm: couldn't register netlink callbacks\n");
 
-	iwcm_wq = create_singlethread_workqueue("iw_cm_wq");
+	iwcm_wq = alloc_ordered_workqueue("iw_cm_wq", WQ_MEM_RECLAIM);
 	if (!iwcm_wq)
 		return -ENOMEM;