WordPress at a glance
filter is not described

dashboard_primary_feed filter-hook . WP 2.3.0

Filters the primary feed URL for the 'WordPress News' dashboard widget.

Usage

add_filter( 'dashboard_primary_feed', 'filter_function_name_9895' );
function filter_function_name_9895( $url ){
	// filter...

	return $url;
}
$url(string)
The widget's primary feed URL.

Where the hook is called

wp_dashboard_primary()
wp-admin/includes/dashboard.php 1297
'url' => apply_filters( 'dashboard_primary_feed', __( 'http://wordpress.org/news/feed/' ) ),

Where the hook is used (in WP core)

Does not used.