netfs: fix parameter of cleanup()

The order of these two parameters is just reversed. gcc didn't warn on
that, probably because 'void *' can be converted from or to other
pointer types without warning.

Cc: stable@vger.kernel.org
Fixes: 3d3c9504 ("netfs: Provide readahead and readpage netfs helpers")
Fixes: e1b1240c ("netfs: Add write_begin helper")
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Link: https://lore.kernel.org/r/20211207031449.100510-1-jefflexu@linux.alibaba.com/ # v1

fs/netfs/read_helper.c

@@ -955,7 +955,7 @@ int netfs_readpage(struct file *file,
 	rreq = netfs_alloc_read_request(ops, netfs_priv, file);
 	if (!rreq) {
 		if (netfs_priv)
-			ops->cleanup(netfs_priv, folio_file_mapping(folio));
+			ops->cleanup(folio_file_mapping(folio), netfs_priv);
 		folio_unlock(folio);
 		return -ENOMEM;
 	}
@@ -1186,7 +1186,7 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
 		goto error;
 have_folio_no_wait:
 	if (netfs_priv)
-		ops->cleanup(netfs_priv, mapping);
+		ops->cleanup(mapping, netfs_priv);
 	*_folio = folio;
 	_leave(" = 0");
 	return 0;
@@ -1197,7 +1197,7 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
 	folio_unlock(folio);
 	folio_put(folio);
 	if (netfs_priv)
-		ops->cleanup(netfs_priv, mapping);
+		ops->cleanup(mapping, netfs_priv);
 	_leave(" = %d", ret);
 	return ret;
 }