We are fully aware that this code is not nearly up for inclusion into
the kernel. What we hope to achieve is that someone with the skills to
do this properly will introduce an option to turn off fragmentation on
PPP multi-link or to just do away with it completely.

You should be able to manage that I'm sure:

The main thing will be to take this chunk, strip out the // stuff and
then make it a function of its own so you've got clean code in the main
path of the form

#ifdef CONFIG_PPP_MULTILINK
	if (ml_explode) {
		if (!ppp_mp_explode(...)
	..
	} else {
		ppp_mp_roundrobin(...)
	}

and your bits as a new routine. You can then do this

static int ml_explode = 1;
module_param(ml_explode, int, 0600);
MODULE_PARM_DESC(ml_expode, "Set this to zero to disabling multilink \
	fragmentation when talking to cisco devices");

which will let you load the module with the option ml_explode = 0 if you
want that property.

Making it runtime per link selectable would be nicer but thats a bit more
work.

Alan