MBOX_ALLOC
if (MBOX_ALLOC(mbox, qp_2rst))
if (MBOX_ALLOC(mbox, qp_2err))
if (MBOX_ALLOC(mbox, rst2init_qp))
if (MBOX_ALLOC(mbox, init2rtr_qp))
if (MBOX_ALLOC(mbox, rtr2rts_qp))
if (MBOX_ALLOC(mbox, rts2rts_qp))
if (MBOX_ALLOC(mbox, sqerr2rts_qp))
if (MBOX_ALLOC(mbox, sqd2rts_qp))
if (MBOX_ALLOC(mbox, init2init_qp))