[syslinux] Patch sensible callback framework

[H. Peter Anvin]

On 05/04/2010 06:45 AM, Ayvaz, James wrote:
> Is this what you had in mind?  I cleaned up as you suggested and added rarg to hold registration time arguments.  

If you're going to make a doubly linked list (which is a good idea),
then I suggest making a circularly linked list with headnode.  You
should never have to do:

> +    /* walk to end of the list */
> +    curr = *type;
> +    while (curr->next)
> +        curr = curr->next;

... since you can then just go either way from the headnode.

	-hpa