FW_GMTX
#define FW_GLOCK(fc) mtx_lock(FW_GMTX(fc))
#define FW_GUNLOCK(fc) mtx_unlock(FW_GMTX(fc))
#define FW_GLOCK_ASSERT(fc) mtx_assert(FW_GMTX(fc), MA_OWNED)
/*lockarg*/FW_GMTX(fc),
/*lockarg*/FW_GMTX(fc),
/*lockarg*/FW_GMTX(&sc->fc),
mtx_init(FW_GMTX(&sc->fc), "firewire", NULL, MTX_DEF);
mtx_destroy(FW_GMTX(&sc->fc));
mtx_destroy(FW_GMTX(&sc->fc));