Get meta information from post parent

Question

So I am in a single page and I want to get some meta information from a parent page. This code is inside my footer.php:

if (is_single()) {
    global $post;
    $parent = get_post_achestor ( $post->ID );
    $some_value = get_post_meta( $parent, 'some_metabox_param', true);
}

It's not working people, can you please have a look?

UPDATE: the parent page in question is template that has this loop

<?php query_posts( 'post_type=post&posts_per_page=5&paged=1' ); 
if ( have_posts() ) : global $more; ?>              
<div class="items">
    <?php while ( have_posts() ) : the_post(); $more = 0; ?>
         <?php get_template_part( 'content', get_post_format() ); ?>
     <?php endwhile; ?>
     </div>
 <?php endif; ?>    

Answer 1

The ID of the parent post is in $post->post_parent. When a post has no parent, that number is 0. So …

if ( is_singular() ) 
{
    global $post;
    if ( 0 !== (int) $post->post_parent )
    {
        $some_value = get_post_meta( $post->post_parent, 'some_metabox_param', true );
        if ( ! empty ( $some_value ) )
            echo $some_value;
    }
}