On Mon, 2009-07-27 at 08:26 -0700, David Miller wrote:

From: Lucian Adrian Grijincu <redacted>
Date: Mon, 27 Jul 2009 18:09:08 +0300

quoted

Some members of net_device are used only by some protocols.
If those protocols are not compiled (as modules or linked in) they
should not take up space in the structure.

This benefits, at best, %0.000000001 of users of the Linux kernel,
because every distribution is going to turn on every single option.

I think the cost of maintaining this is small and the
percentage of users that benefit underestimated.

It does help handsets a trivial amount, which are unlikely
to ever enable decnet or econet.

If you want to shrink structures, find ways to eliminate or
shrink structure members in all cases.

Good advice.