Displaying Child pages of the current page

<?php
 $mypages = get_pages( array( 'child_of' => $post->ID, 'sort_column' => 'post_date', 'sort_order' => 'desc' ) );

 foreach( $mypages as $page ) {  
  $content = $page->post_content;
  if ( ! $content ) // Check for empty page
   continue;

  $content = apply_filters( 'the_content', $content );
 ?>
  <h2><a href="<?php echo get_page_link( $page->ID ); ?>"><?php echo $page->post_title; ?></a></h2>
  <div class="entry"><?php echo $content; ?></div>
 <?php
 } 
?>