Exporting kbd_pt_regs in keyboard.c.

of pcspkr.o and another 90 elsewhere in the .o file.

Linus spotted one cut-n-pasto ('tracing' argument) but didn't see the
other: we were walking the ptrace_children list by the sibling field.

So we got garbage for your task_structs when this happened.  If the list
wasn't empty, it would crash.  Strace detaches from all tasks when it
receives a Control-C so only with enough threads and SMP would this be
easily seen.

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

This patch implements UML for 2.5.34.

I have changed the name of a local variable "l" to be "j", because with some
fonts should be difficult to see if [1+l+i] means [2+i] or what.

using init_etherdev(0, 0) in probe is a race. The struct net_device must be
allocate and filled before init_etherdev is called, or there's a race which
creates a network interface that isn't usable.
The patch for kaweth for 2.5 fixes it.

	ata_attach in linux-2.5.34/drivers/ide/ide.c builds a list of
IDE drives that do not yet have a device driver bound to them, in case
ide-disk, ide-scsi, or whatever driver you want to use is not loaded
yet.

	The problem was that ata_attach was adding to the head of
the list, so the list was being built in reverse order.  So, if
you had two IDE disks, and ide-disk was a loadable module, the
devfs entries for the disks would be numbered in reverse (the
first disk would be /dev/discs/disc1, and the second would be
/dev/discs/disc0).

	This fixes the problem by changing the relevant list_add to
list_add_tail.  Incidentally, the generic code in drivers/base/ already
does it this way.

One more patch:  this turns off async schedule processing
if there are no control or bulk transactions for a while
(currently HZ/3).  Consequence:  no PCI accesses unless
there's work to do.  (And a FIXME comment is gone!)

 Minor nit: the subject driver depends on ATM, so a config-time check to
 see if ATM support is enabled is appropriate.

this handles the error case.

new device ids for hpusbscsi

This removes some bugs:

 - a short read problem with control requests
 - only creates one control qh (memleak fix)
 - adds an omitted hardware handshake
 - reset timeout in octal, say what?
 - a couple BUG()s outlived their value

Plus it deletes unused stub code for split ISO
and updates some internal doc.

  * Tells about some Epson firmware that uses this as part
    of a Linux interop solution (PDA-ish SoCs, hmm)
  * Includes some GeneSys info from emails
  * Minor cleanups

HandyTech's Braille displays support a USB port, those are
implemented with a GoHubs usb serial converter.  The only difference
is that the pID is 0x1200, not 0x1000.

252 for exit_group

This fixes the old-pthreads breakage i can reproduce.

the fix is to only do the thread-group exit-completion logic in case of
thread-groups.

This is another step to have better threading support under Linux, it
implements the sys_exit_group() system call.

It's a straightforward extension of the generic 'thread group' concept,
which extension also comes handy to solve a number of problems when
implementing POSIX threads.

POSIX exit() [the C library function] has the following semantics: all
thread have to exit and the waiting parent has to get the exit code that
was specified for the exit() function.  It also has to be ensured that
every thread has truly finished its work by the time the parent gets the
notification.  The exit code has to be propagated properly to the parent
thread even if not the thread group leader calls the exit() function.

Normal single-thread exit is done via the pthread_exit() function, which
calls sys_exit().

Previous incarnations of Linux POSIX threads implementations chose the
following solution: send a 'thread management' signal to the thread
group leader via tkill(), which thread goes around and kills every
thread in the group (except itself), then calls sys_exit() with the
proper exit code.  Both old libpthreads and NGPT use this solution.

This works to a certain degree, unless a userspace threading library
uses the initial thread for normal thread work [like the new
libpthreads], which 'work' can cause the initial thread to exit
prematurely.

At this point the threading library has to catch the group leader in
pthread_exit() and has to keep the management thread 'hanging around'
artificially, waiting for the management signal. Besides being slightly
confusing to users ('why is this thread still around?') even this variant
is unrobust: if the initial thread is killed by the kernel (SIGSEGV or any
other thread-specific event that triggers do_exit()) then the thread goes
away without the thread library having a chance to intervene.

the sys_exit_group() syscall implements the mechanism within the kernel,
which, besides robustness, is also *much* faster. Instead of the threading
library having to tkill() every thread available, the kernel can use the
already existing 'broadcast signal' capability. (the threading library
cannot use broadcast signals because that would kill the initial thread as
well.)

as a side-effect of the completion mechanism used by sys_exit_group() it
was also possible to make the initial thread hang around as a zombie until
every other thread in the group has exited. A 'Z' state thread is much
easier to understand by users - it's around because it has to wait for all
other threads to exit first.

and as a side-effect of the initial thread hanging around in a guaranteed
way, there are three advantages:

 - signals sent to the thread group via sys_kill() work again. Previously
   if the initial thread exited then all subsequent sys_kill() calls to
   the group PID failed with a -ESRCH.

 - the get_pid() function got faster: it does not have to check for tgid
   collision anymore.

 - procps has an easier job displaying threaded applications - since the
   thread group leader is always around, no thread group can 'hide' from
   procps just because the thread group leader has exited.

 [ - NOTE: the same mechanism can/will also be used by the upcoming
     threaded-coredumps patch. ]

there's also another (small) advantage for threading libraries: eg. the
new libpthreads does not even have any notion of 'group of threads'
anymore - it does not maintain any global list of threads. Via this
syscall it can purely rely on the kernel to manage thread groups.

the patch itself does some internal changes to the way a thread exits: now
the unhashing of the PID and the signal-freeing is done atomically. This
is needed to make sure the thread group leader unhashes itself precisely
when the last thread group member has exited.

(the sys_exit_group() syscall has been used by glibc's new libpthreads
code for the past couple of weeks and the concept is working just fine.)

I forgot to remove an unused label in the deadlock fix patch.

Remove pty.o from the export-objs list, since pty.c does not export
any symbols.

A /* EXPORT_SYMBOL */ comment may have fooled the original author.

Removed compatibility cruft from zftape_syms.c.
There is no need to be compatible with kernel 2.1.18 and older.
Replaced FT_KSYM with direct call to EXPORT_SYMBOL.

- signal update; make do_signal use generic get_signal_to_deliver()
- irqs_disabled macro
- remove vmlinux.lds.s target from arch/alpha/Makefile since it works
  correctly in the top level Makefile
- extra argument for pcibios_enable_device (most likely we'll never
  use it though...)

  clean up with bio_kmap_irq() thing properly. remove the micro optimization of _not_ calling kmap_atomic() if this isn't a highmem page. we could keep that and do the inc_preempt_count() ourselves, but I'm not sure it's worth it and this is cleaner.

into hera.kernel.org:/home/axboe/BK/linux-2.5-ide

to bio_kmap/kunmap_irq(), which would screw the preemption count. pass
in rq to ide_unmap_buffer() as well to make the right decision.

o silly IS_PDC4030_DRIVE definition

silly old irq and region registration etc.

o byte -> u8
o use atapi register definitions
o update to ide-iops changes
o driver->end_request() changes
o update to new ide-dma api
o ->reinit to ->attach