tqhash_max
rsm = tqhash_max(rack->r_ctl.tqh);
rsm = tqhash_max(rack->r_ctl.tqh);
rsm = tqhash_max(rack->r_ctl.tqh);
rsm = tqhash_max(rack->r_ctl.tqh);
tqhash_max(struct tailq_hash *hs);
for ((var) = ((var) ? (var) : tqhash_max((head))); \