legacy module_init(), just to confuse people).

Ingo spotted this one too, it's a leftover from when the elevator type
wasn't a variable. Also don't pass in &q->elevator, it can always be
deduced from queue itself of course.

All of them in a single patch, would be silly to split. Does two things:

o Inc module usage count to forcefully pin the module

o Make the chipset init data __devinitdata

o Kill ->init_setup() and just make it generic

Lets kill these off for good.

o Remove OUT_BYTE/IN_BYTE and variants. We defaulted to the fast ones
  even before

o Add read barrier for ppc, it needs it

We don't need to care about the request, just look purely at the
taskfile itself.

o Make CONFIG_BLK_DEV_IDEPCI read 'PCI IDE chipset support' and not
  'Generic...', it's just confusing.

Here starts some new ide updates.

o Don't turn on dma before after having sent the packet cdb
o Clear sense data given in generic command, otherwise the user cannot
  trust it. I already sent this patch for 2.4.20-pre inclusion.

o Remove unused drq entry in deadline_merge()
o Quit if insertion point found in deadline_merge()

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

into mulgrave.(none):/home/jejb/BK/scsi-for-linus-2.5

into mulgrave.(none):/home/jejb/BK/scsi-for-linus-2.5

This incorporates security fixes from Alan that I brought from the
2.4.20-pre9 tree.

- Fixup for new tq changes
- Fix dv1394 for use without devfs
- Fix dv1394 for PAL capture
- Fix a hard to trigger bug in nodemgr.c
- Add another broken firmware device to sbp2's list

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Convert send_sigurg() to the for_each_task_pid() mechanism.  Also in
the case where we were trying to send a signal to a non-existent PID,
don't bother searching for -PID in the PGID array; we won't find it.

Translation code for old devfs names that _never_ were in mainline
for root=.

The following patch removes the export of the sys_call_table.

There are no uses of this export that are valid and correct. The uses I've
found so far are

1. Calling syscalls from inside kernel modules
iBCS/Linux-abi used to do this (and this is the reason for the export
in the first place), however it does
no longer, because newer gcc's (2.96/3.x) don't allow
function pointer calls with a mismatching type. Also it's much better to
just call the sys_foo functions directly (most are export symbol'd already
and exporting more if needed wouldn't be a problem, they are clearly a
stable interface). Since gcc does no longer allow this
(and I doubt older ones allowed it for all platforms) this I
consider invalid and unneeded use.

2. Install new syscalls from kernel modules
LiS seems to be doing this. The correct way to do this is how NFS does
it for its syscall, and that doesn't need the syscall table to be
exported for this. Without an in-kernel helper like NFS has, it is not
possible to do this race free wrt module-unloads etc. Eg this use of the
export is unneeded and incorrect.

3. Intercept system calls
OProfile (and intel's vtune which is similar in function) used to do this;
however what they really need is a notification on certain
events (exec() mostly). The way modules do this is store the original
function pointer, install a new one that calls the old one after storing
whatever info they need. This mechanism breaks badly in the light of
multiple such modules doing this versus modules
unloading/uninstalling their handlers (by restoring their saved pointer
that may or may not point to a valid handler anymore).
Eg the use of the export in this just a bandaid due to lack of a
proper mechanism, and also incorrect and crash prone.

4. Extend system calls
The mechanism for this is identical to the previous one, except
that now the actual syscall behavior is changed. I don't think open source
modules do this (generally they don't need to, just adding things to the
kernel proper works for them), however I've
seen IBM's closed source cluster fs do this.
The objections to the mechanism are the same as in 3. Also
this changes the userspace ABI effectively, something which is undesireable.

Forward port from 2.4

Someone tweaked the PC110 documents changing touchpad to touchscreen,
this changes it back because it is a touchpad and _not_ a touchscreen

The GMX code in the DRI is unfinished stuff.  You need the old 4.0 DRM
for the GMX2000 until 4.3 at least

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

pipe_write contains a wakeup storm, 2 writers that write into the same
fifo can wake each other up, and spend 100% cpu time with
wakeup/schedule, without making any progress.

The only regression I'm aware of is that

  $ dd if=/dev/zero | grep not_there

will fail due to OOM, because grep does something like

	for(;;) {
		rlen = read(fd, buf, len);
		if (rlen == len) {
			len *= 2;
			buf = realloc(buf, len);
		}
	}

if it operates on pipes, and due to the improved syscall merging, read
will always return the maximum possible amount of data. But that's a grep
bug, not a kernel problem.

patch from DaveM

This does a number of timer subsystem enhancements:

- simplified timer initialization, now it's the cheapest possible thing:

    static inline void init_timer(struct timer_list * timer)
    {
            timer->base = NULL;
    }

  since the timer functions already did a !timer->base check this did not
  have any effect on their fastpath.

- the rule from now on is that timer->base is set upon activation of the
  timer, and cleared upon deactivation. This also made it possible to:

- reorganize all the timer handling code to not assume anything about
  timer->entry.next and timer->entry.prev - this also removed lots of
  unnecessery cleaning of these fields. Removed lots of unnecessary list
  operations from the fastpath.

- simplified del_timer_sync(): it now uses del_timer() plus some simple
  synchronization code. Note that this also fixes a bug: if mod_timer (or
  add_timer) moves a currently executing timer to another CPU's timer
  vector, then del_timer_sync() does not synchronize with the handler
  properly.

- bugfix: moved run_local_timers() from scheduler_tick() into
  update_process_times() .. scheduler_tick() might be called from the fork
  code which will not quite have the intended effect ...

- removed the APIC-timer-IRQ shifting done on SMP, Dipankar Sarma's
  testing shows no negative effects.

- cleaned up include/linux/timer.h:

     - removed the timer_t typedef, and fixes up kernel/workqueue.c to use
       the 'struct timer_list' name instead.

     - removed unnecessery includes

     - renamed the 'list' field to 'entry' (it's an entry not a list head)

     - exchanged the 'function' and 'data' fields. This, besides being
       more logical, also unearthed the last few remaining places that
       initialized timers by assuming some given field ordering, the patch
       also fixes these places. (fs/xfs/pagebuf/page_buf.c,
       net/core/profile.c and net/ipv4/inetpeer.c)

     - removed the defunct sync_timers(), timer_enter() and timer_exit()
       prototypes.

     - added docbook-style comments.

- other kernel/timer.c changes:

     - base->running_timer does not have to be volatile ...

     - added consistent comments to all the important functions.

     - made the sync-waiting in del_timer_sync preempt- and lowpower-
       friendly.

i've compiled, booted & tested the patched kernel on x86 UP and SMP. I
have tried moderately high networking load as well, to make sure the timer
changes are correct - they appear to be.

This fixes all known signal semantics problems.

sigwait() is really evil - i had to re-introduce ->real_blocked. When a
signal has no handler defined then the actual action taken by the kernel
depends on whether the sigwait()-ing thread was blocking the signal
originally or not. If the signal was blocked => specific delivery to the
thread, if the signal was not blocked => kill-all.

fortunately this meant that PF_SIGWAIT could be killed - the real_blocked
field contains all the necessery information to do the right decision at
signal-sending time.

i've also cleaned up and made the shared-pending code more robust: now
there's a single central dequeue_signal() function that handles all the
details. Plus upon unqueueing a shared-pending signal we now re-queue the
signal to the current thread, which this time around is not going to end
up in the shared-pending queue. This change handles the following case
correctly: a signal was blocked in every signal, then one thread unblocks
it and gets the signal delivered - but there's no handler for the signal
=> the correct action is to do a kill-all.

i removed the unused shared_unblocked field as well, reported by Oleg
Nesterov.

now we pass both signal-tst1 and signal-tst2, so i'm confident that we got
most of the details right.

This does a number of futex bugfixes, performance improvements and
cleanups.

The bugfixes are:

 - fix locking bug noticed by Martin Wirth: the ordering of
   page_table_lock, vcache_lock and futex_lock was inconsistent and
   created the possibility of an SMP deadlock.

 - fix spurious wakeup noticed by Andrew Morton: the get_user() in
   futex_wait() can set the task state to TASK_RUNNING.

 - fix futex_wake COW race, noticed by Martin Wirth - futex_wake() has to
   go through the same lookup rules as the futex_wait() code, otherwise it
   might end up trying to wake up based on the wrong physical page.

Improvements:

 - speed up the basic addrs => page lookup done by the futex code. It used
   to do an unconditional get_user_pages() call, which did a vma lookup
   and other heavy-handed tactics - while the common case is that the
   page is mapped and available. Furthermore, due to the COW-race code we
   had to re-check the mapping anyway, which made the get_user_pages()
   thing pretty unnecessery. This inefficiency was noticed by Martin
   Wirth.

   the new lookup code first does a lightweight follow_page(), then if no
   page is present we do the get_user_pages() thing.

 - locking cleanups - the new lookup code made some things simpler, eg.
   the hash calculation can now be done in queue_me().

 - added comments

 - reduced include file use.

 - increased the futex hashtable.

This modifies x86's dump_stack() to print out just the backtrace, not
the stack contents.  The patch also adds one more whitespace after the
numeric EIP value.  The old dump looked this way:

  bad: scheduling while atomic!
  Stack: ffffffff c041c72f 0000006a 00000068 000000f0 c13e1f28 c04c49c0 c13e1f28
         c02a4099 c04c49c0 000000f0 00000000 00003104 c012592e 00003104 00003104
         ffffffff 34000286 00000282 00000000 00000000 c13e1f28 c04c49c0 c04c4468
  Call Trace:
   [<c011f009>]sys_gettimeofday+0x89/0x90
   [<c0113e40>]do_page_fault+0x0/0x49e
   [<c0107d63>]syscall_call+0x7/0xb

the new output is:

  bad: scheduling while atomic!
  Call Trace:
   [<c011f009>] sys_gettimeofday+0x89/0x90
   [<c0113e40>] do_page_fault+0x0/0x49e
   [<c0107d63>] syscall_call+0x7/0xb

much nicer and much more compact.

- alpha/kernel/signal.c: sigmask_lock to sig->siglock transition;
- alpha/lib/Makefile: fix EV6 targets (restore EXTRA_AFLAGS accidentally
  killed by previous patch).

Ported across from a nearly identical fix to the glibc tree.  Under
some conditions we'd read one too many source words and segfault.

Some pci devices may have base address registers locked with non-zero values.
Examples:
- AGP aperture BAR of AMD-7xx host bridges: if the AGP window disabled,
  this BAR is read-only and read as 0x00000008;
- BAR0-4 of ALi IDE controllers can be non-zero and read-only.

Obviously, we can't calculate correct size of the respective region in
this case (for AMD AGP window we'll get 4 GB resource - ouch).
So I think that we should ignore r/o BARs (let the device specific
fixups deal with them if needed).

Patch appended (note that extra write(0)/read-back pair is required,
as the BAR might be programmed with all 1s).

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Regularize the erratic whitespace conventions in mm/shmem.c.  Removal
of blank line changes BUG_ON line numbers, otherwise builds the same.

If PAGE_CACHE_SIZE were to differ from PAGE_SIZE, the VM_ACCT macro,
and shmem_nopage's vm_pgoff manipulation, were still not quite right.

Slip a cond_resched_lock into shmem_truncate's long loop; but not into
shmem_unuse_inode's, since other locks held, and swapoff awful anyway.

Move SetPageUptodate to where it's not already set.  Replace
copy_from_user by __copy_from_user since access already verified.

Replace BUG()s by BUG_ON()s.  Remove an uninteresting PAGE_BUG().