This small patch builds on top of the blk_rq_map_user() patch just sent,
and enables us to easily support DMA for CDROMREADAUDIO cdda extraction.
It's quite amazing how much cool stuff you can with the new block layer
:-)

Patch has intelligent fall back from multi frame dma to single frame
dma, and further to old-style pio ripping in case of hardware problems.

This patch allows you to map a request with user data for io, similarly
to what you can do with bio_map_user() already to a bio. However, this
goes one step further and populates the request so the user only has to
fill in the cdb (almost) and put it on the queue for execution. Patch
converts sg_io() to use it, next patch I'll send adapts cdrom layer to
use it for zero copy cdda dma extraction.

While playing with udev, I discovered that the virtual console
devices on iSeries had there minor numbers off by one i.e. /dev/tty1
was minor 2!

This fixes it.

From Takashi Iwai

kobj_lookup had a 64bit bug, which caused the request of a unknown
character device to burn CPU instead of failing quickly.

The biggest new feature is fixed 32bit vsyscall (SYSCALL+SYSENTER)
support, mostly from Jakub Jelinek.  This increases 32bit syscall
performance greatly (latency halved and better).  The SYSENTER for Intel
support required some infrastructure changes, but seems to work now too.

The 64bit vsyscall vtime() just references xtime.tv_sec now.  This
should make it a lot faster too.

A fix for some Intel IA32e systems.  Also a few long standing bugs in
NMI like exception handlers were fixed.

And a lot of other bug fixes.

Full changeLog:
 - Clean up 32bit address room limit handling, fix 3gb personality
 - Move memcpy_{from,to}io export to ksyms.c file. This seems to work
   around a toolchain bug (Andreas Gruenbacher)
 - Update defconfig
 - ACPI merges from i386 (SBF should work now, acpi=strict)
 - Implement mmconfig support based on i386 code (untested)
 - Fix i386/x86-64 pci source file sharing
 - Implement ptrace access for 32bit vsyscall page
 - Always initialize all 32bit SYSENTER/SYSCALL MSRs.
 - Export run time cache line size to generic kernel
 - Remove explicit CPUID in ia32 syscall code
 - Fill in most of boot_cpu_data early
 - Remove unused PER_LINUX32 setup
 - Fix syscall trace in fast 32bit calls (Suresh B. Siddha)
 - Tighten first line of the oops again.
 - Set up ptrace registers correctly for debug,ss,double fault exceptions
 - Fix 64bit bug in sys_time64
 - Optimize time syscall/vsyscall to only read xtime
 - Fix csum_partial_copy_nocheck
 - Remove last traces of FPU emulation
 - Check properly for rescheduling in exceptions with own stack
 - Harden exception stack entries (#SS,#NMI,#MC,#DF,#DB) against bogus GS
 - Use an exception stack for machine checks
 - Handle TIF_SINGLESTEP properly in kernel exit
 - Add exception stack for debug handler
 - Disable X86_HT for Opteron optimized builds because it pulls in ACPI_BOOT
 - Fix CONFIG_ACPI_BOOT compilation without CONFIG_ACPI
 - Fix eflags handling in SYSENTER path (Jakub Jelinek)
 - Use atomic counter for enable/disable_hlt
 - Support 32bit SYSENTER vsyscall too (Jakub Jelinek)
 - Don't redefine Dprintk
 - Change some cpu/apic id arrays to char
 - Support arbitary cpu<->apicid in hard_smp_processor_id (Surresh B Sidda)
 - Move K8 erratum #100 workaround into slow path of page fault handler.
 - Fix 32bit cdrom direct access ioctls (Jens Axboe)
 - Enable 32bit vsyscalls by default
 - Fix 32bit vsyscalls (Jakub Jelinek)

This makes the temperature control code more robust, putting less
pressure on i2c, and work around occasional misconfiguration of the ADC
chips leading to incorrect temperature readings.

This patch fixes the code that workaround lockups when accessing
the config space of devices on K2 when they are shut down. The
code was there but in the wrong place ;) And a typo prevented the
ohci1394 version of it from working.

into ppc970.osdl.org:/home/torvalds/v2.5/linux

When adding an additional device, a variable which has been removed
is accessed.  Adding the first device or a 4-port card works.
Adding a second device was not done in PCI hot plug testing.  Now
tested on IA32.

The bug turned out to be memory corruption by DMA, and
the corrupted address made it that much more obvious.

Getting some blood sugar made the real fix for that become
obvious! This replaces the preceding TEMPORARY hack.

Only unlink EDs that aren't already being unlinked!

Duh.

Fix some OHCI TD list corruption issues:

    - Don't rewrite HC registers holding ED pointers until the HC
      had a good chance to finish using them.

    - Don't ever modify ed->hwTailP

Adds text describing the different ED states.

Adds TEMPORARY hack that may make a "rm_list becomes circular" bug
continuable.

This patch was trying to work around buggy SMM bios but causes problems
by not deasserting NMI irq line (reported by Thomas Schlicht) for some
integrated local apic.

This patch was written originally as an optimization (with the side
effect to fix those bugged bios) but was never applied to 2.4 tree.

The rational was: fix your bios instead. 

Cset exclude: akpm@osdl.org|ChangeSet|20040219045328|16041

From: William Lee Irwin III <wli@holomorphy.com>

Remember to invalidate the task->tty of threads, otherwise prod_pid_stat()
later stumbles over the dangling pointers and crashes.

The condition still seems to happen on ppc64.

sock_sendmsg() modifies iovec passed to it - it sets all length members of
iovec array to zero on success transmission (and even on failed if it
fails after iovec copy, but...) and advances pointers to point at the end
of buffers used. This has an unfortunate effect that ncpfs's retry on
failure does not work for IPX/UDP connections - kernel refused to do anything
because length from iovec was 0 while length passed to sock_sendmsg() was
correct.

This simple fix gets rid of a problem by creating temporary iovec copy, which can
sock_sendmsg destroy if it has such wish.

This adds infrared remote support for a few more bt878-based TV cards.

From Mike Christie <michaelc@cs.wisc.edu>

The first three bio and request flags are no longer identical.  The bio
barrier and rw flags are getting set in __make_request and get_request
respectively, and failfast is getting left out.

This sets the request's failfast flag in __make_request when the bio's
flag is set.

The ppc64 fix last week (enforcing permissions on the kernel when
accessing userspace pages) uncovered a bug on POWER3/RS64. We werent
zeroing the segment table entry before overwriting it and it was possible
for the ks bit to be set on a kernel segment.

The VSID mask was also changed to match reality (we only use 13 bits).

into ppc970.osdl.org:/home/torvalds/v2.5/linux

This patch reworks the early boot calls to OF to initialize displays.

All present displays are now initialized in reverse order so the
OF console stays on the first one. Initializing them all is necessary
for dual head configurations as we need OF driver to properly setup
the secondary TMDS of the video card, XFree isn't able to do that
currently

The assembly code used to callback into Open Firmware client
interface in 32 bits mode used to backup the stack pointer in
the SPRG2 register.

That upsets Apple's implementation of Open Firmware significantly
and maybe others, causing them to crash in _some_ operations,
apparently the trigger is to cause a segment or hash table
fault, typically happens when letting that code initialize the
second display.

This patch fixes it, along with other cleanups of that asm code,
it did unnecessary register restores and backing up the stack
pointer is actually useless anyway.

Strangely, I though I fixed that a long time ago, but it was still
broken in the current tree...

Drivers like radeonfb fail to find the OF device matching a given PCI
device on the G5 AGP bus because of some bus renumbering tricks.  This
patch fixes the problem by fixing the bus numbers in the OF node.  This
corrects radeonfb and other drivers looking for EDID / PLL datas in the
OF node.

into ppc970.osdl.org:/home/torvalds/v2.5/linux

Especially with REGPARM these things actually matter.

This fixes possible lockups in pmac_zilog when beeing flooded with
incoming data (not that other serial drivers share the same race, I told
Russel about it already).  It also fixes some SCC initialization
problems, add some PM callback, and fix the irda setup code.

This does cosmetic changes the pmac_zilog, changing the use of "up" as
an identifier in favor "uap" to avoid collision with semaphores, use
proper debug macros, and a few other cosmetic bits.

From Jan-Benedict Glaw <jbglaw@lug-owl.de>

Original patch from Stephen Hemminger

Move last bits of code out of irsyms and onto irmod.c where
initialization happens.

Move irda_debug parameter out of irsyms.c into irmod.c
and make it a new style module parameter.

irda_device_setup can now be static, only called from alloc_irdadev.