Simplify some other code.

Also rename untypedefed x25_cb, renaming it to x25_opt, to make
it look like the other protocols.

Added some kerneldoc comments.

That saves space in the generated binaries and make it easier to
drop the lock just in one place.

Typedefs can't be forward declared, so we prefer structs, that can.

Stupid me, this is really needed, IPX as it supports several datalink_protos
and needs pt->type to find the right interface. Appletalk doesn't care, so
it worked without this. And these are the only snap users in the kernel.

We have to hold the skb, because llc_sap_next_state
will kfree it in the sending path and we need to
look at the skb->cb, where we encode llc_sap_state_ev.

Also remove some unneeded struct forward declarations.

Now that we don't have anymore the double sock (PF_LLC + core) we can
use struct sock list members.

Also use use rw locks instead of spinlocks in some places.

OK, now I managed to kill the last remnants of bloated structs from
LLC, I feel better now :)

Also deleted include/net/llc_{frame,name,state}.h, remnants of the
old LLC stack still in the tree.

With this one the sap->ind and ->conf callbacks are gone, now the core
is tightly integrated with the socket layer (PF_LLC) and the
datalink_protos are mostly working like when the old LLC stack was
in the kernel, i.e. without special receiving routines for IPX in
802.2 mode, now I have to work on the UI sending routines to kill more
stupid structs. 

Slowly killing the ugly struct forest.

With this llc_ui_sockets is almost not needed anymore, next
changesets will deal with the dataunit/xid/test primitives, that
are still using it.

It is the same bug fixed some months ago in tcp_v6_get_port,
i.e. we can't touch ipv6 private areas without checking if
the socket is AF_INET6.

We can just use llc_lookup_established, one less user of llc_ui_sockets.

With this I'm slowly (real job hampering progress ;) ) going down
the road that will allow me to remove llc_ui_sockets and llc_opt->sk_list,
using only the per llc_sap linked lists.

Now we have llc_conn_space and use it to see if we can accept the
packet in the core llc state machine. Transfers of 80 megabytes now
are safe 8)

. Use a smaller default for LLC_ACK_TIME.
. Added much more info about core sock internal state in /proc/net/802.2

into nuts.ninka.net:/home/davem/src/BK/net-2.5

into nuts.ninka.net:/home/davem/src/BK/net-2.5

- Support wake-on-lan with Fiber connections properly,
when possible.
- On device probe and device open, get out of 44MHZ core
clock rate if necessary.

into home.transmeta.com:/home/torvalds/v2.5/linux