flush_scheduled_work() is being deprecated.  Flush the used work
directly instead.  In all dm targets, the only work which uses
system_wq is ->trigger_event.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
        flush_workqueue(kmpath_handlerd);
        multipath_wait_for_pg_init_completion(m);
        flush_workqueue(kmultipathd);
-       flush_scheduled_work();
+       flush_work_sync(&m->trigger_event);
 }
 
 static void multipath_dtr(struct dm_target *ti)
 
 
        del_timer_sync(&ms->timer);
        flush_workqueue(ms->kmirrord_wq);
-       flush_scheduled_work();
+       flush_work_sync(&ms->trigger_event);
        dm_kcopyd_client_destroy(ms->kcopyd_client);
        destroy_workqueue(ms->kmirrord_wq);
        free_context(ms, ti, ms->nr_mirrors);