xfs: don't require log items to implement optional methods

Just check if they are present first.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

1 files changed, 0 insertions, 104 deletions

diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index c403cc85e350..b2395cb1674c 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -97,15 +97,6 @@ xfs_bui_item_format(
 }
 
 /*
- * Pinning has no meaning for an bui item, so just return.
- */
-STATIC void
-xfs_bui_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an BUI is manipulated in the log. It is
  * either inserted in the AIL or aborted in the event of a log I/O error. In
  * either case, the BUI transaction has been successfully committed to make it
@@ -124,21 +115,6 @@ xfs_bui_item_unpin(
 }
 
 /*
- * BUI items have no locking or pushing.  However, since BUIs are pulled from
- * the AIL when their corresponding BUDs are committed to disk, their situation
- * is very similar to being pinned.  Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log.  This should help in getting the BUI out of
- * the AIL.
- */
-STATIC uint
-xfs_bui_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The BUI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an BUD isn't going to be
  * constructed and thus we free the BUI here directly.
@@ -152,43 +128,13 @@ xfs_bui_item_unlock(
 }
 
 /*
- * The BUI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_bui_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
-/*
- * The BUI dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_bui_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
  * This is the ops vector shared by all bui log items.
  */
 static const struct xfs_item_ops xfs_bui_item_ops = {
 	.iop_size	= xfs_bui_item_size,
 	.iop_format	= xfs_bui_item_format,
-	.iop_pin	= xfs_bui_item_pin,
 	.iop_unpin	= xfs_bui_item_unpin,
 	.iop_unlock	= xfs_bui_item_unlock,
-	.iop_committed	= xfs_bui_item_committed,
-	.iop_push	= xfs_bui_item_push,
-	.iop_committing = xfs_bui_item_committing,
 };
 
 /*
@@ -250,38 +196,6 @@ xfs_bud_item_format(
 }
 
 /*
- * Pinning has no meaning for an bud item, so just return.
- */
-STATIC void
-xfs_bud_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
- * Since pinning has no meaning for an bud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_bud_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
-{
-}
-
-/*
- * There isn't much you can do to push on an bud item.  It is simply stuck
- * waiting for the log to be flushed to disk.
- */
-STATIC uint
-xfs_bud_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The BUD is either committed or aborted if the transaction is cancelled. If
  * the transaction is cancelled, drop our reference to the BUI and free the
  * BUD.
@@ -324,31 +238,13 @@ xfs_bud_item_committed(
 }
 
 /*
- * The BUD dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_bud_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
  * This is the ops vector shared by all bud log items.
  */
 static const struct xfs_item_ops xfs_bud_item_ops = {
 	.iop_size	= xfs_bud_item_size,
 	.iop_format	= xfs_bud_item_format,
-	.iop_pin	= xfs_bud_item_pin,
-	.iop_unpin	= xfs_bud_item_unpin,
 	.iop_unlock	= xfs_bud_item_unlock,
 	.iop_committed	= xfs_bud_item_committed,
-	.iop_push	= xfs_bud_item_push,
-	.iop_committing = xfs_bud_item_committing,
 };
 
 /*