ceph: switch the last caller of iov_iter_get_pages_alloc()

here nothing even looks at the iov_iter after the call, so we couldn't
care less whether it advances or not.
Reviewed-by: NJeff Layton <jlayton@kernel.org>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/ceph/addr.c

@@ -329,7 +329,7 @@ static void ceph_netfs_issue_read(struct netfs_io_subrequest *subreq)
 
 	dout("%s: pos=%llu orig_len=%zu len=%llu\n", __func__, subreq->start, subreq->len, len);
 	iov_iter_xarray(&iter, READ, &rreq->mapping->i_pages, subreq->start, len);
-	err = iov_iter_get_pages_alloc(&iter, &pages, len, &page_off);
+	err = iov_iter_get_pages_alloc2(&iter, &pages, len, &page_off);
 	if (err < 0) {
 		dout("%s: iov_ter_get_pages_alloc returned %d\n", __func__, err);
 		goto out;