WordPress at a glance
action is not described

comment_atom_entry action-hook . WP 2.2.0

Fires at the end of each Atom comment feed item.

Usage

add_action( 'comment_atom_entry', 'action_function_name_3010', 10, 2 );
function action_function_name_3010( $comment_id, $comment_post_id ){
	// action...
}
$comment_id(int)
ID of the current comment.
$comment_post_id(int)
ID of the post the current comment is connected to.

Where the hook is called

In file: /wp-includes/feed-atom-comments.php
comment_atom_entry
wp-includes/feed-atom-comments.php 120
do_action( 'comment_atom_entry', $comment->comment_ID, $comment_post->ID );

Where the hook is used (in WP core)

Does not used.