The _ isnt allowed in a docbook id

of gcc incorrectly accepted as "short". It got fixed to __u8, but
it really should be __u16.

And here all the other x86-64 changes that have accumulated in my tree.

It's various bugfixes and cleanups.

Changes:

 - fix nmi watchdog
 - remove local timer spreading over CPUs - it's useless here and caused many problems
 - New offset.h computation from Kai
 - Lots of changes for the C99 initializer syntax
 - New MTRR driver from Dave & Mats
 - Bugfix: kernel threads don't start with interrupts disabled anymore, which fixes
   various boottime hangs (this was fixed a long time ago, but the bug crept in again
   by the backdoor)
 - Do %gs reload in context switch lockless
 - Fix device_not_available entry point race
 - New per CPU GDT layout following i386: the layot is not completely
   compatible with i386, which may problems with Wine in theory.
   Haven't seen any yet.
 - Support disableapic option
 - driverfs support removed for now because it caused crashes
 - Updates for new signal setup
 - Support for kallsyms
 - Port TLS clone flags/syscalls: unfortunately made the context switch
   even uglier than it already is.
 - Security fixes for ptrace
 - New in_interrupt()/atomic setup ported from i386
 - New makefiles mostly from Kai
 - Various updates ported from i386

Some timer updates from Vojtech Pavlik for x86-64.  In theory support
HPET timing now, but the support is disabled.

Would actually need vxtime_lock() macros in the generic timer code to
protect xtime updates, but I'm leaving that out now because it's only
needed for vsyscalls and they're currently disabled.

Port of the hotplug CPU changes from i386 for x86-64.  I don't expect
x86-64 hardware to support CPU hotplugging any time soon, but this makes
it all compile & work again and keeps some consistency.

Update various lib/ functions for x86-64:

 - new memcpy/memset/csum-copy/copy_page/user
 - add bitstr support function for IOMMU
 - Other minor fixes and updates.

Merge from i386 for x86-64: move reboot functions to an own file.

Straightforward merge from i386: remove support for global cli for
x86-64

Update for the x86-64 PCI subsystem in 2.5.42.  Main new feature is PCI
IOMMU support through the K8 aperture.  This allows to use more than 4GB
of memory with 32bit PCI devices.  Also some other PCI changes, mostly
merges from i386.

Some bugfixes for the 32bit emulation for x86-64 and make it all compile
again.

Has rewritten ioctl registration code and some other updates.  New
system calls are supported.

It unfortunately broke some time ago by binfmt_elf changes for all
shared linked libraries.  Will fix that later.

New e820 memory map handling for x86-64.  Move it all to a new file and
clean it up a lot.  Add some simple allocator functions to deal with
holey e820 mappings cleanly A lot of this is preparation for NUMA (which
works in 2.4, but is not ported to 2.5 yet)

Update the early 32bit bootloader for x86-64.  This stuff is near
completely identical to i386, except for a few Makefile changes to tell
the x86-64 toolkit to compile in 32bit mode.

ACPI updates for x86-64/2.5.42

ACPI finally works now.

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

SPARC was unconditionally setting CONFIG_SERIAL_CORE_CONSOLE to y
and conditionally setting CONFIG_SERIAL_CORE depending on the Sparc
sub-drivers.  In addition, the core serial driver for SPARC is
always built, so we end up with link errors.

We instead make CONFIG_SERIAL_CORE{,_CONSOLE} dependent on building
the SPARC core driver (CONFIG_SERIAL_SUNCORE).

with attribute unused.

variables in #if RTC_IRQ.

  warning: right shift count >= width of type
by casting to long before shifting by HIGH_BITS_OFFSET.

  warning: long int format, different type arg (arg 5)
by casting ino_t arguments to unsigned long for printf formats.
In some instances, change %ld to %lu.

Problem: if another CPU is using lazy-TLB, the LDT flushing won't flush
the other CPU's LDT entry.

Fix: use active_mm instead of mm for the flush IPI.

we should allow read-write accesses - it's used for control, not
data.

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

Not perfectly clean yet, but uses the standard way to descend into subdirs
and gives me working vmlinux and linux targets without spurious rebuilds.

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

Fix buggy #if removal in iphase.c that crept in with the initcalls fixup.