writeback for ring read pointer (Paul Mackerras)
* Get rid of some superfluous stuff, minor fixes

  missing define from previous checkin

Submitted by: Erdi Chen

Adapt to nopage() prototype change in Linux 2.6.1.

Reviewed by: Arjan van de Ven <arjanv@redhat.com>, additional feedback
from William Lee Irwin III and Linus Torvalds.

Don't ioremap the framebuffer area. The ioremapped area wasn't used by
anything.

Return EBUSY when attempting to addmap a DRM_SHM area with a lock in it if
dev->lock.hw_lock is already set. This fixes the case of two X Servers running
on the same head on different VTs with interface 1.1, by making the 2nd head
fail to inizialize like before.

- Tie the DRM to a specific device: setunique no longer succeeds when given
a busid that doesn't correspond to the device the DRM is attached to. This
is a breaking of backwards-compatibility only for the multiple-DRI-head case
with X Servers that don't use interface 1.1.
- Move irq_busid to drm_irq.h and make it only return the IRQ for the current
device. Retains compatibility with previous X Servers, cleans up unnecessary
code. This means no irq_busid on !__HAVE_IRQ, but can be changed if
necessary.
- Bump interface version to 1.2. This version when set signifies that the
control ioctl should ignore the irq number passed in and enable the
interrupt handler for the attached device. Otherwise it errors out when
the passed-in irq is not equal to the device's.
- Store the highest version the interface has been set to in the device. 

Memory layout transition:

* the 2D driver initializes MC_FB_LOCATION and related registers sanely
* the DRM deduces the layout from these registers
* clients use the new SETPARAM ioctl to tell the DRM where they think the
framebuffer is located in the card's address space
* the DRM uses all this information to check client state and fix it up if
necessary

This is a prerequisite for things like direct rendering with IGP chips and
video capturing.

 Introduce a new ioctl, DRM_IOCTL_SET_VERSION. This ioctl allows the server
or client to notify the DRM that it expects a certain version of the device
dependent or device independent interface. If the major doesn't match or minor
is too large, EINVAL is returned. A major of -1 means that the requestor
doesn't care about that portion of the interface. The ioctl returns the actual
versions in the same struct. 

the drm_file_t * based on the filp passed in ioctl handlers. 

- Move IRQ functions from drm_dma.h to new drm_irq.h and disentangle them from
__HAVE_DMA. This will be useful for adding vblank sync support to sis and
tdfx. Rename dma_service to irq_handler, which is more accurately what it is.
- Fix the #if _HAVE_DMA_IRQ in radeon, r128, mga, i810, i830, gamma to have
the right number of underscores. This may have been a problem in the case
that the server died without doing its DRM_IOCTL_CONTROL to uninit

just a single instance. The PCI ID lists include a driver private field, which may be used
by drivers for chip family or other information. Based on work by jonsmirl
and Eric Anholt. I've left out the PCI device naming for this patch as
that might be a bit controversial. clean up tdfx to look like everyone else..

We default to "long" (which is what POSIX says), but since
a number of architectures have used "int" for historical
reasons, we need to allow overrides.

At least sparc64 needs this. Possibly others, but so far
architecture maintainers haven't spoken up. ppc64 and x86-64
are known to be ok with the default "long".

From Ivan Kokshaysky <ink@jurassic.park.msu.ru>.

into heffalump.twiddle.home:/home/rth/work/linux/axp-2.6

From: Matt Porter <mporter@kernel.crashing.org>

Patch fixes a latent bug in the PPC44x tlb management code.

From: Matt Porter <mporter@kernel.crashing.org>

Make a couple 4xx defconfigs functional again.

From: Matt Porter <mporter@kernel.crashing.org>

IDs new PPC44x silicon.

From: Matt Porter <mporter@kernel.crashing.org>

Patch fixes the build for PPC40x platforms.

From: Tom Rini <trini@kernel.crashing.org>

When I was updating ppc/boot/simple/relocate.S to work on PPC_PREP systems, I
in advertantly broke 4xx systems.  On classic PPC, the first three
instructions are nops, of which the first two can be overwritten.  This is
not true of 4xx (or 8xx, but that's not working right now anyhow).  The
following is needed to fix this.

The commoncap module calls this.

into ppc970.osdl.org:/home/torvalds/v2.6/linux

- Use -march=armv6 where available.
- CFLAGS_BOOT isn't needed - the decompressor uses CFLAGS, remove it.
- PROCESSOR is never used, remove it.
- LDFLAGS_BLOB is never used, remove it.
- Remove MACHINE macro.
- Correct comments for include/asm-arm/.arch target.
- Copy format of include/asm symlink rule.
- Arrange for configuration to be split before making
  include/asm-arm/arch symlink.
- This means that asm-offsets.s no longer depends on
  include/config/MARKER.

diva_os_cancel_soft_isr() may not call tasklet_kill(), because it is
interrupt context.  This will be done correctly in the cleanup function
anyway.

The patch to check "maxcpus=N" early broke by putting maxcpus (a
variable which is only exported by mpparse.c) into
parse_cmdline_early().

The fix is to make it depend on the correct CONFIG_ option. 

In the subarchitectures:

CONFIG_X86_SMP is the one that means "I want standard x86 smp code" and
that's what this should depend on.

This patch from Christoph Hellwig does much welcomes cleanup of
the old mac53c94 and mesh SCSI drivers, removing sillycaps etc...

From: Sam Ravnborg <sam@ravnborg.org>

Fix this:

 	  Building modules, stage 2.
 	  MODPOST
 	LANG := en_US.UTF-8
 	make: LANG: Command not found
 	make: *** [all] Error 127

by removing the tab in front of the LANG assignment.

into ppc970.osdl.org:/home/torvalds/v2.6/linux

into ppc970.osdl.org:/home/torvalds/v2.6/linux

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

This fixes a problem in sys_swapon that can cause the creation of invalid
swap ptes.  This has its cause in the arch-independent swap entries vs. 
the pte coded swap entries.  The swp_entry_t uses 27 bits for the offset
and 5 bits for the type.  In sys_swapon this definition is used to find how
many swap devices and how many pages on each device there can be.  But the
swap entries encoded in a pte can be subject to additional restrictions due
to the hardware besides the 27/5 division of the bits in the swp_entry_t
type.  This is solved by adding pte_to_swp_entry and swp_entry_to_pte calls
to the calculations for maximum type and offset.

In addition the s390 swap pte division for offset/type is changed from 19/6
bits to 20/5 bits.