This patch for 2.5.28 fixes two explicit accesses to thread_info->cpu
in generic code to use the new UP-optimised macros instead.

This patch for 2.5.28 reduces the stack frame size of
arch/i386/kernel/nmi.c:check_nmi_watchdog() from 4096 bytes
in the worst case to 128 bytes.

The problem with the current code is that it copies the entire
irq_stat[] array, when only a single field (__nmi_count) is of
interest. The irq_stat_t element type is only 28 bytes, but it
is also ____cacheline_aligned, and that blows the array up to
4096 bytes on SMP P4 Xeons, 2048 bytes on SMP K7s, and 1024 bytes
on SMP P5/P6s. The patch reduces this to NR_CPUS*4==128 bytes.

I've noticed that xtime_lock and timerlist_lock ends up on the same
cacheline  all the time (atleaset on x86).  Not a good thing for
loads with high xxx_timer and do_gettimeofday counts I guess (networking etc).

Here's a trivial fix.

This is a complete rewrite of the LDM driver (support for Windows
Dynamic Disks).  It incorporates Al Viro's recent partition handling
tidy ups.

Details:
  LDM Driver rewritten.  More efficient.  Much smaller memory footprint.

  The old driver was little more than a stopgap.
  The new driver is a complete rewrite
  based on a much better understanding of the database
  based on much more reverse engineering
  more able to spot errors and inconsistancies
  it has a much smaller memory footprint
  no longer considered experimental
  accompanied by brief info: Documentation/ldm.txt

On a ppc64 machine running 2.5.28 we were hitting this BUG in
__free_pages_ok:

BUG_ON(page->pte.chain != NULL);

In pte_chain_lock we use test_and_set_bit which implies a memory
barrier. In pte_chain_unlock we use clear_bit which has no memory
barriers so we need to add one.

Here's a patch from Christoph Hellwig and myself to supply write->read
semaphore downgrade, and also from Brian Watson to supply trylock for rwsems.

Make sure the cpu argument to cpu_online() is evaluated for
side effects on UP too.

Things look rather like this..

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

values on input devices. This is something the X peoople
really wanted.
Rename input_devinfo to input_id, it's shorter and more 
to the point.
Remove superfluous printks in uinput.c
Clean up return values in evdev.c ioctl. 

comes to directions of movement and rotation, a mouse wheel should
be positive where it "rotates forward, away from the user". We had
the opposite in psmouse.c. Fixed this.

converter to atkbd.c - trivial. Remove ps2serkbd, because it's
not needed anymore.

input struct to userspace.

from a device belong together was implemented - input_sync() and
EV_SYN. Touches every input driver. The first to make use of it
is mousedev.c to properly merge events into PS/2 packets.

into twilight.ucw.cz:/home/vojtech/bk/input

Fix cli() breakage in input (gameport) drivers.

into twilight.ucw.cz:/home/vojtech/bk/linus

Update for removed global irq lock

Rediffed with the 2.5.28 biosparm change included

irq can be -1 if the card errors during config. synchronize_irq(-1) looks
bad

The Q40 keyboard is only found on a Q40..

Event is just used for internal flags and with set_bit for atomicity. This
kills the warning the obvious way

Whoever updated it was coding without due care and attention 8)

drivers for PS/2 ports on both StrongARM and ARM Integrator hardware.
  -- Russell King