rem: nv_acc_assert_fifo();
add: if (si->ps.card_arch < NV40A) nv_acc_assert_fifo();
context: status_t ACQUIRE_ENGINE(uint32 capabilities, uint32 max_wait, sync_token *st, engine_token **et){	/* acquire the shared benaphore */	AQUIRE_BEN(si->engine.lock)	/* sync if required */	if (st) SYNC_TO_TOKEN(st);	/* make sure all needed engine cmd's are mapped to the FIFO */	nv_acc_assert_fifo();	/* return an engine token */	*et = &nv_engine_token;	return B_OK;}