prev_tx          1724 dev/ic/xl.c    	struct xl_chain		*prev_tx;
prev_tx          1750 dev/ic/xl.c    		prev_tx = cur_tx;
prev_tx          1756 dev/ic/xl.c    			cur_tx = prev_tx;
prev_tx          1856 dev/ic/xl.c    	struct xl_chain	*prev_tx;
prev_tx          1878 dev/ic/xl.c    		prev_tx = cur_tx;
prev_tx          1884 dev/ic/xl.c    			cur_tx = prev_tx;