function bbp_clean_post_cache( $post_id = null, $post = null ) {

	// Child query types to clean
	$post_types = array(
		bbp_get_forum_post_type(),
		bbp_get_topic_post_type(),
		bbp_get_reply_post_type()
	);

	// Bail if not a bbPress post type
	if ( ! in_array( $post->post_type, $post_types, true ) ) {
		return;
	}

	/**
	 * Fires immediately after the given post cache is cleaned.
	 *
	 * @since 2.1.0
	 *
	 * @param int     $post_id Post ID.
	 * @param WP_Post $post    Post object.
	 */
	do_action( 'bbp_clean_post_cache', $post->ID, $post );

	// Invalidate parent caches
	if ( ! empty( $post->post_parent ) ) {
		clean_post_cache( $post->post_parent );

	// Only bump `last_changed` when forum-root is reached
	} else {
		wp_cache_set( 'last_changed', microtime(), 'bbpress_posts' );
	}
}