xfs: drop unused ioend private merge and setfilesize code

XFS no longer attaches anthing to ioend->io_private. Remove the
unnecessary ->io_private merging code. This removes the only remaining
user of xfs_setfilesize_ioend() so remove that function as well.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/xfs/xfs_aops.c

@@ -85,31 +85,6 @@ xfs_setfilesize(
 	return __xfs_setfilesize(ip, tp, offset, size);
 }
 
-STATIC int
-xfs_setfilesize_ioend(
-	struct iomap_ioend	*ioend,
-	int			error)
-{
-	struct xfs_inode	*ip = XFS_I(ioend->io_inode);
-	struct xfs_trans	*tp = ioend->io_private;
-
-	/*
-	 * The transaction may have been allocated in the I/O submission thread,
-	 * thus we need to mark ourselves as being in a transaction manually.
-	 * Similarly for freeze protection.
-	 */
-	xfs_trans_set_context(tp);
-	__sb_writers_acquired(VFS_I(ip)->i_sb, SB_FREEZE_FS);
-
-	/* we abort the update if there was an IO error */
-	if (error) {
-		xfs_trans_cancel(tp);
-		return error;
-	}
-
-	return __xfs_setfilesize(ip, tp, ioend->io_offset, ioend->io_size);
-}
-
 /*
  * IO write completion.
  */
@@ -163,25 +138,6 @@ xfs_end_ioend(
 	memalloc_nofs_restore(nofs_flag);
 }
 
-/*
- * If the to be merged ioend has a preallocated transaction for file
- * size updates we need to ensure the ioend it is merged into also
- * has one.  If it already has one we can simply cancel the transaction
- * as it is guaranteed to be clean.
- */
-static void
-xfs_ioend_merge_private(
-	struct iomap_ioend	*ioend,
-	struct iomap_ioend	*next)
-{
-	if (!ioend->io_private) {
-		ioend->io_private = next->io_private;
-		next->io_private = NULL;
-	} else {
-		xfs_setfilesize_ioend(next, -ECANCELED);
-	}
-}
-
 /* Finish all pending io completions. */
 void
 xfs_end_io(
@@ -201,7 +157,7 @@ xfs_end_io(
 	while ((ioend = list_first_entry_or_null(&tmp, struct iomap_ioend,
 			io_list))) {
 		list_del_init(&ioend->io_list);
-		iomap_ioend_try_merge(ioend, &tmp, xfs_ioend_merge_private);
+		iomap_ioend_try_merge(ioend, &tmp, NULL);
 		xfs_end_ioend(ioend);
 	}
 }