xfs: exit AIL push work correctly when AIL is empty

{

	struct xfs_ail		*ailp = container_of(to_delayed_work(work),

					struct xfs_ail, xa_work);

	long		tout;

	xfs_lsn_t	target =  ailp->xa_target;

	xfs_lsn_t	lsn;

	xfs_log_item_t	*lip;

	int		flush_log, count, stuck;

	xfs_mount_t		*mp = ailp->xa_mount;

	struct xfs_ail_cursor	*cur = &ailp->xa_cursors;

	xfs_log_item_t		*lip;

	xfs_lsn_t		lsn;

	xfs_lsn_t		target = ailp->xa_target;

	long			tout = 10;

	int			flush_log = 0;

	int			stuck = 0;

	int			count = 0;

	int			push_xfsbufd = 0;

	spin_lock(&ailp->xa_lock);

		 */

		xfs_trans_ail_cursor_done(ailp, cur);

		spin_unlock(&ailp->xa_lock);

		ailp->xa_last_pushed_lsn = 0;

		return;

		goto out_done;

	}

	XFS_STATS_INC(xs_push_ail);

	 * lots of contention on the AIL lists.

	 */

	lsn = lip->li_lsn;

	flush_log = stuck = count = 0;

	while ((XFS_LSN_CMP(lip->li_lsn, target) < 0)) {

		int	lock_result;

		/*

	}

	/* assume we have more work to do in a short while */

	tout = 10;

out_done:

	if (!count) {

		/* We're past our target or empty, so idle */

		ailp->xa_last_pushed_lsn = 0;