Display a "Show All" (pages) link

For paging module, to add a "Show all" link in the pager, override the theme('pager') function and add the following right before the return statement:

    $items[] = array(
      'class' => 'pager-all',
      'data' => l(t('Show all'), $_GET['q'], array('query' => array('page' => 'full'))),
    );