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_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index fce38b56b962..03a61886fe2a 100644
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -95,15 +95,6 @@ xfs_cui_item_format(
 }
 
 /*
- * Pinning has no meaning for an cui item, so just return.
- */
-STATIC void
-xfs_cui_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an CUI 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 CUI transaction has been successfully committed to make it
@@ -122,21 +113,6 @@ xfs_cui_item_unpin(
 }
 
 /*
- * CUI items have no locking or pushing.  However, since CUIs are pulled from
- * the AIL when their corresponding CUDs 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 CUI out of
- * the AIL.
- */
-STATIC uint
-xfs_cui_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The CUI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an CUD isn't going to be
  * constructed and thus we free the CUI here directly.
@@ -150,43 +126,13 @@ xfs_cui_item_unlock(
 }
 
 /*
- * The CUI 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_cui_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
-/*
- * The CUI 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_cui_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
  * This is the ops vector shared by all cui log items.
  */
 static const struct xfs_item_ops xfs_cui_item_ops = {
 	.iop_size	= xfs_cui_item_size,
 	.iop_format	= xfs_cui_item_format,
-	.iop_pin	= xfs_cui_item_pin,
 	.iop_unpin	= xfs_cui_item_unpin,
 	.iop_unlock	= xfs_cui_item_unlock,
-	.iop_committed	= xfs_cui_item_committed,
-	.iop_push	= xfs_cui_item_push,
-	.iop_committing = xfs_cui_item_committing,
 };
 
 /*
@@ -254,38 +200,6 @@ xfs_cud_item_format(
 }
 
 /*
- * Pinning has no meaning for an cud item, so just return.
- */
-STATIC void
-xfs_cud_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
- * Since pinning has no meaning for an cud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_cud_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
-{
-}
-
-/*
- * There isn't much you can do to push on an cud item.  It is simply stuck
- * waiting for the log to be flushed to disk.
- */
-STATIC uint
-xfs_cud_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The CUD is either committed or aborted if the transaction is cancelled. If
  * the transaction is cancelled, drop our reference to the CUI and free the
  * CUD.
@@ -328,31 +242,13 @@ xfs_cud_item_committed(
 }
 
 /*
- * The CUD 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_cud_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
  * This is the ops vector shared by all cud log items.
  */
 static const struct xfs_item_ops xfs_cud_item_ops = {
 	.iop_size	= xfs_cud_item_size,
 	.iop_format	= xfs_cud_item_format,
-	.iop_pin	= xfs_cud_item_pin,
-	.iop_unpin	= xfs_cud_item_unpin,
 	.iop_unlock	= xfs_cud_item_unlock,
 	.iop_committed	= xfs_cud_item_committed,
-	.iop_push	= xfs_cud_item_push,
-	.iop_committing = xfs_cud_item_committing,
 };
 
 /*