stop_sync_thread
stop_sync_thread(mddev, true);
stop_sync_thread(mddev, true);
stop_sync_thread(mddev, true);
stop_sync_thread(mddev, false);
stop_sync_thread(mddev, true);
int stop_sync_thread(struct netns_ipvs *ipvs, int state);
ret = stop_sync_thread(ipvs, dm->state);
ret = stop_sync_thread(ipvs,
retc = stop_sync_thread(ipvs, IP_VS_STATE_MASTER);
retc = stop_sync_thread(ipvs, IP_VS_STATE_BACKUP);