xfs: get rid of log item callbacks

They are not used anymore, so remove them from the log item and the
buffer iodone attachment interfaces.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_buf_item.c

@@ -955,23 +955,6 @@ xfs_buf_item_relse(
 	xfs_buf_item_free(bip);
 }
 
-
-/*
- * Add the given log item with its callback to the list of callbacks
- * to be called when the buffer's I/O completes.
- */
-void
-xfs_buf_attach_iodone(
-	struct xfs_buf		*bp,
-	void			(*cb)(struct xfs_buf *, struct xfs_log_item *),
-	struct xfs_log_item	*lip)
-{
-	ASSERT(xfs_buf_islocked(bp));
-
-	lip->li_cb = cb;
-	list_add_tail(&lip->li_bio_list, &bp->b_li_list);
-}
-
 /*
  * Invoke the error state callback for each log item affected by the failed I/O.
  *

fs/xfs/xfs_buf_item.h

@@ -54,9 +54,6 @@ void	xfs_buf_item_relse(struct xfs_buf *);
 bool	xfs_buf_item_put(struct xfs_buf_log_item *);
 void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
 bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
-void	xfs_buf_attach_iodone(struct xfs_buf *,
-			      void(*)(struct xfs_buf *, struct xfs_log_item *),
-			      struct xfs_log_item *);
 void	xfs_buf_inode_iodone(struct xfs_buf *);
 void	xfs_buf_dquot_iodone(struct xfs_buf *);
 void	xfs_buf_iodone(struct xfs_buf *);

fs/xfs/xfs_dquot.c

@@ -1187,11 +1187,11 @@ xfs_qm_dqflush(
 	}
 
 	/*
-	 * Attach an iodone routine so that we can remove this dquot from the
-	 * AIL and release the flush lock once the dquot is synced to disk.
+	 * Attach the dquot to the buffer so that we can remove this dquot from
+	 * the AIL and release the flush lock once the dquot is synced to disk.
 	 */
 	bp->b_flags |= _XBF_DQUOTS;
-	xfs_buf_attach_iodone(bp, NULL, &dqp->q_logitem.qli_item);
+	list_add_tail(&dqp->q_logitem.qli_item.li_bio_list, &bp->b_li_list);
 
 	/*
 	 * If the buffer is pinned then push on the log so we won't

fs/xfs/xfs_inode.c

@@ -2711,7 +2711,8 @@ xfs_ifree_cluster(
 			xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn,
 						&iip->ili_item.li_lsn);
 
-			xfs_buf_attach_iodone(bp, NULL, &iip->ili_item);
+			list_add_tail(&iip->ili_item.li_bio_list,
+						&bp->b_li_list);
 
 			if (ip != free_ip)
 				xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -3861,7 +3862,7 @@ xfs_iflush_int(
 	 * the flush lock.
 	 */
 	bp->b_flags |= _XBF_INODES;
-	xfs_buf_attach_iodone(bp, NULL, &iip->ili_item);
+	list_add_tail(&iip->ili_item.li_bio_list, &bp->b_li_list);
 
 	/* generate the checksum. */
 	xfs_dinode_calc_crc(mp, dip);

fs/xfs/xfs_trans.h

@@ -37,10 +37,6 @@ struct xfs_log_item {
 	unsigned long			li_flags;	/* misc flags */
 	struct xfs_buf			*li_buf;	/* real buffer pointer */
 	struct list_head		li_bio_list;	/* buffer item list */
-	void				(*li_cb)(struct xfs_buf *,
-						 struct xfs_log_item *);
-							/* buffer item iodone */
-							/* callback func */
 	const struct xfs_item_ops	*li_ops;	/* function list */
 
 	/* delayed logging */