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

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.

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

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

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

into jgrimm.austin.ibm.com:/home/jgrimm/bk/test.merge.38

sctp: one more list_t removal.
sctp: more whitespace cleanup (jgrimm)
sctp: merge with linux bk tree
sctp: Minor ABORT updates (ardelle.fan)  
sctp: Fix misc. COOKIE-ECHO bundling bugs.  (jgrimm)

  There were small windows where the following could occur.
  -Two DATA chunks bundled with COOKIE-ECHO (only 1 allowed.)
  -DATA bundled with lost COOKIE-ECHO needs resent too.
  -DATA sent while in COOKIE-ECHOED if there had not been control data already bundled.

sctp:  more updates for abort (jgrimm and ardelle.fan)
  
  Cleanup T5 upon abort.   Send COMM_LOST notification to ULP upon abort.

sctp: updates to T5 shutdown timer.  (samudrala)
  
  I missed a couple changes from Sridhar's last patch.

sctp: more ABORT, cleanup shutdown timers (ardelle.fan)
  
  When we send or receive an ABORT, there may be a variety of timers running. 
  Turn these timers off when we abort.

sctp: Fix bug in COOKIE-ECHO retransmission.  (jgrimm)
    
  We had saved away the pointer directly to the INIT-ACK state cookie param, but upon COOKIE ECHO retransmission, this skb has already been thrown away.   The fix is to save away the cookie.

sctp:  Unknown chunk processing. (daisyc)
  
  Each chunkheader contains the chunk type.  
  For forward compatiblity, 'action' bits in the type describe what action 
  the peer requests if one does not understand that chunk type.  This patch is to
  implement the handling of those 'unrecognized chunk' actions.

sctp: Add T5 shutdown guard handling. (samudrala)
  
  The T5-shutdown-guard timer is used to bound the time we are willing to try gracefully shutting down.   This protects against certain pathological peers.

sctp: Add msg_name support for notifications and PF_INET sockets. (jgrimm)

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

This fixes a number of bugs in the thread-release code:

 - notify parents only if the group leader is a zombie,
   and if it's not a detached thread.

 - do not reparent children to zombie tasks.

 - introduce the TASK_DEAD state for tasks, to serialize the task-release
   path. (to some it might be confusing that tasks are zombies first, then
   dead :-)

 - simplify tasklist_lock usage in release_task().

the effect of the above bugs ranged from unkillable hung zombies to kernel
crashes. None of those happens with the patch applied.

Patch killing off elevator_linus for good. Sniffle.

This introduces the deadline-ioscheduler, making it the default.  2nd
patch coming that deletes elevator_linus in a minute.

This one has read_expire at 500ms, and writes_starved at 2.

Sanity checkthe ESCD size. From 2.4.

These two chipsets are most common on alpha.
- cy82c693: allow the generic IDE setup code to work correctly
  with broken PCI registers layout of this chip. This fixes
  quite a few problems with secondary channel, plus some hacks in
  arch code can go away.
- ALi M5229: enable DMA.

This removes the cmpxchg from the PID allocator and replaces it with a
spinlock.  This spinlock is hit only a couple of times per bootup, so
it's not a performance issue.

Ulrich found another small detail wrt. POSIX requirements for threads -
this time it's the recursion features (read-held lock being write-locked
means an upgrade if the same 'process' is the owner, means a deadlock if a
different 'process').

this requirement even makes some sense - the group of threads who own a
lock really own all rights to the lock as well.

These changes fix this, all testcases pass now.  (inter-process
testcases as well, which are not affected by this patch.)

(SIGURG and SIGIO semantics should also continue to work - there's some
more stuff we can optimize with the new pidhash in this area, but that's
for later.)

The loop device driver was broken in 2.5.38 when it was converted over
to use gendisk.  I discovered this while doing final regression testing
on the ext3 htree code.

The problem is that figure_loop_size() is setting the capacity of the
loop device in kilobytes (because that's what compute_loop_size()
returns), but set_capacity() expects the size in 512 byte sectors.

I've enclosed a patch which fixes the problem, as well as simplifying
the code by eliminating compute_loop_size(), since it is a static
function is only used once by figure_loop_size().

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.

into kleikamp.austin.ibm.com:/home/shaggy/bk/jfs-2.5

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.

As it is at the moment, sys_mprotect will dereference a null pointer
if you use it on a region that is contained within the first vma.  I
have a little program that demonstrates this (I'll post it if anyone
is interested).  What happens then is that the process hangs in
do_page_fault at the down_read on the mm->mmap_sem, since sys_mprotect
has done a down_write on mm->mmap_sem.

The problem is that mprotect_fixup isn't updating prev properly.  Thus
we can finish the main loop in sys_mprotect with prev == NULL.  This
has been the case since Christoph's cleanups went in.  Prior to that,
mprotect_fixup always set prev to something non-NULL.  I suspect that
not updating prev could also cause vmas to get dropped completely if
the region being mprotected spans more than one vma.

The patch below fixes the problem by making mprotect_fixup set prev to
a reasonable value in all circumstances.

This unsafe access to per-CPU data via reordering of instructions or use
of "get_cpu()".

Before anyone balks at the brlock.h fix, note this was in the
alternative version of the code which is not used by default.

Before the irqs_disabled() check in preempt_schedule(), we worked around
some locking issues in slab.c.  Now that we will never preempt with
interrupts disabled, we can remove those and clean things up.

This is courtesy of Manfred Spraul.

This converts the debugging check in do_exit from a check on
preempt_count() to in_atomic().

The main benefit to this is we will stop warning over the BKL and now
use the standard mechanism for such checks.

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

Looks like I dropped a hunk from my patchset, sorry.

We never set FL_SLEEP in the flock case, so if we should block, we'll
livelock instead.

This is needed for reasonable read latency with the new VM
behaviour. 

NOTE! This is way too unfair, Andrew and Jens are working on
alternatives.

 - Makefile cleanups and fixes
 - a bunch of syscalls added
 - removed crap from asm/ide.h (it's not needed anymore)
 - __down_read_trylock fix

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.

IDE must use blk_queue_empty() and not do a list_empty() on the
(potentially only) dispatch queue.  This took quite a while to find
while debugging a new io scheduler...

This fixes the emacs bug reported by Andries.  It should probably also
fix other, terminal handling related weirdnesses introduced by the new
PID handling code in 2.5.38.

The bug was in the session_of_pgrp() function, if no proper session is
found in the process group then we must take the session ID from the
process that has pgrp PID (which does not necesserily have to be part of
the pgrp).  The fallback code is only triggered when no process in the
process group has a valid session - besides being faster, this also
matches the old implementation.

[ hey, who needs a POSIX conformance testsuite when we have emacs! ;) ]

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.