Is there a reason why the tunnel driver for IPv6-in-IPv4 is currently
compiled into the ipv6 module? This driver is only needed in gateways
between different IPv6 networks. On all other hosts with ipv6 enabled it
is not required. To have this driver in a seperate module will save
memory on those machines.
I appended a small and trival patch to 2.6.18 which does exactly this.

Joerg