read_seqcount_retry
if (args->busy && read_seqcount_retry(&obj->resv->seq, seq))
if (i != shared_count || read_seqcount_retry(&obj->seq, seq)) {
if (read_seqcount_retry(&obj->seq, seq)) {
if (read_seqcount_retry(&obj->seq, seq))
if (read_seqcount_retry(&obj->seq, seq))