gss_seq_is_newer
if (gss_seq_is_newer(*req->rq_seqnos, READ_ONCE(ctx->gc_seq)))
while (gss_seq_is_newer(*req->rq_seqnos, seq_xmit)) {
ret = !gss_seq_is_newer(*req->rq_seqnos, seq_xmit - win);