DTRACE_HASHSTR
ndx = DTRACE_HASHSTR(hash, probe) & new_mask;
int hashval = DTRACE_HASHSTR(hash, new);
int hashval = DTRACE_HASHSTR(hash, template);
int hashval = DTRACE_HASHSTR(hash, template);
int ndx = DTRACE_HASHSTR(hash, probe) & hash->dth_mask;