nm_generic_mbuf_dtor
nm_generic_mbuf_dtor(m);
nm_generic_mbuf_dtor(m);
(void *)fn : (void *)nm_generic_mbuf_dtor; \
m_extadd(m, buf, MCLBYTES, nm_generic_mbuf_dtor, NULL, NULL, 0,
m_extadd(m, buf, MCLBYTES, nm_generic_mbuf_dtor, NULL, NULL, 0,