From: Tejun Heo <redacted>
Date: Fri, 17 Jan 2014 13:11:52 -0500

net_cls and net_prio are the only cgroups which are allowed to be
built as modules.  The savings from allowing the two controllers to be
built as modules are tiny especially given that cgroup module support
itself adds quite a bit of complexity.

The following are the sizes of vmlinux with both built as module and
both built as part of the kernel image with cgroup module support
removed.

	text		data		bss		dec
	20292207	2411496		10784768	33488471
	20293421	2412568		10784768	33490757

The total difference is 2286 bytes.  Given that none of other
controllers has much chance of being made a module and that we're
unlikely to add new modular controllers, the added complexity is
simply not justifiable.

As a first step to drop cgroup module support, this patch changes the
two config options to bool from tristate and drops module related code
from the two controllers.

Signed-off-by: Tejun Heo <redacted>

Acked-by: David S. Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>