m_align
m_align(m, len + headspace);
m_align(n, 0);
m_align(n, remain);
m_align(m, len);
m_align(m, len);
m_align(m, alen); /* Align the payload. */
m_align(m, 0);
m_align(m, 0);
m_align(m, 0);
m_align(m, 0);
m_align(m, 0);
m_align(m0, 0);
m_align(m, s->s_len);
m_align(m, sizeof(*h));
m_align(m, space);
m_align(m, space);
m_align(m, 0);
m_align(m, sizeof(*h));
m_align(m0, 0);
m_align(mc, out_len);
m_align(m, len);
m_align(m, 2 * 3);
m_align(m, 2);
m_align(m, 2);
m_align(m, sizeof(*ea));
m_align(m, sizeof(*ea));
m_align(m, len);
m_align(m, len);
m_align(m, m->m_len);
m_align(m, hlen);
m_align(mh, sizeof(*ip6));
m_align(mh, sizeof(struct ip6_hdr));
m_align(m, maxlen);
m_align(m, maxlen);
m_align(mb, authsiz + 10 * NFSX_UNSIGNED);
void m_align(struct mbuf *, int);