/*
 * LIST_MOVE(dsthead, srchead, field)
 *
 *	Initialize dsthead and move all elements, in order, from
 *	srchead to dsthead, so that srchead is empty afterward.
 */
#define	LIST_MOVE(dsthead, srchead, field) do				      \
{									      \
	LIST_INIT((dsthead));						      \
	if (!LIST_EMPTY((srchead))) {					      \
		(dsthead)->lh_first = (srchead)->lh_first;		      \
		(dsthead)->lh_first->field.le_prev = &(dsthead)->lh_first;    \
		LIST_INIT((srchead));					      \
	}								      \
} while (0)