QCMTX_OFF
MTXWRITE4(sc, QCMTX_OFF(idx), QCMTX_APPS_PROC_ID);
if (MTXREAD4(sc, QCMTX_OFF(idx)) !=
KASSERT(MTXREAD4(sc, QCMTX_OFF(idx)) == QCMTX_APPS_PROC_ID);
KASSERT(MTXREAD4(sc, QCMTX_OFF(idx)) == QCMTX_APPS_PROC_ID);
MTXWRITE4(sc, QCMTX_OFF(idx), 0);