Mainly involved fixing a great many docproc warnings, by filling in
missing documentation in the source code.

Detection of an ATAPI taskfile is possible using a simple test
on existing information, so there is no need to cache this value
in a separate flag (ATA_QCFLAG_ATAPI).  Instead, create and use
a new helper function is_atapi_taskfile().

* SEEK(6), SEEK(10), and REZERO_UNIT are no-ops.  Unconditionally
  complete these commands with success.
* MODE SENSE caching page work:
	* correct page length
	* set bit, if read-ahead is disabled
	* set bit, if writeback caching is enabled
	  (previously, this bit was never set, even if
	   writeback caching was enabled)
* add MODE SENSE r/w error recovery page

* note a nasty problem with shared interrupts that must be fixed
  before we turn on certain code paths.
* add a few comments to the READ CAPACITY scsi simulator
* remove a FIXME comment from the TEST UNIT READY scsi simulator
* add constant for ATA command CHECK POWER MODE, and associated
  "mandatory" power management feature set bit.

The SCSI T10 committee is working on a document describing a standard
method for translating ATA<->SCSI, since it being done quite often
these days.  Some of the recommendations are reasonable, and we implement
two here:

* Mirror that ATA 'removeable media' bit into INQUIRY output.
* Change behavior of INQUIRY output field 'product revision' from
  the libata software version number to the first 4 bytes of the
  ATA device's firmware revision number.

Rather than cache the firmware revision in struct ata_device, as was/is
done with two other strings, I took the opportunity to eliminate the
caching of the two other strings, 'vendor' and 'product'.  These strings
are now retrieved as needed from the IDENTIFY [PACKET] DEVICE info page,
since we cache its entire contents.

Retrieving a string from the identify-device page is done via the
helper function ata_dev_id_string(), which is now exported.

This patch winds up making struct ata_device 40 bytes smaller, and
the libata core gets a bit smaller as well.

ata_scsi_translate() sets this flag for all ATA->SCSI translated
commands, so it need not be done in atapi_xlat().  The now-removed
use in atapi_xlat() was also inconsistent WRT PIO versus DMA.

DMADIR bit is necessary for some PATA->SATA bridges.  These
bridges require the OS driver to specify the data xfer direction,
for PACKET (a.k.a. scsi) commands.

A reliable DMADIR detection method hasn't yet been developed,
and ATAPI is still a WIP, so DMADIR is enabled with an ifdef for
now.

It's easier to do it this way, than polling, at the moment.

Also, fix a test in ata_scsi_translate that was incorrectly
erroring-out non-data commands.

* now that ATAPI is close to working, making ATAPI DMA interrupts
  in ata_host_intr
* remove unnecessary space character in printk() output (oh, the horror)

Remove unused 'done_late' arg to ata_qc_complete(), which was never
useful in 2.4, and never used at all in 2.6.

This allows us to eliminate the same arg from ata_dma_complete(),
and also make it more correct by passing the command rather than
the ATA port structure as arg0.

into redhat.com:/spare/repo/libata-2.6

This avoids warnings about unused variables.

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

into redhat.com:/spare/repo/i810-audio-2.6

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

x86_64 has an incorrect ffs() implementation.  The asm uses "g" instead
of "rm" for the bsfl instruction.  (This was spotted by Yuri Per.)

bsfl does not accept constant values but only memory or register ones.
On i386 the correct "rm" is used.

This causes NTFS build to fail as gcc optimizes a variable into a
constant and ffs() then fails to assemble.

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

into kernel.bkbits.net:/home/davem/net-2.6

this trivial fix makes the AVM B1 PCMCIA cards work with 2.6

This adds links to the driver and device inside /sys/class/net/ethX for
PowerPC Virtual Ethernet devices.

This fixes a bug where different partitions were assigned the same MAC
address.  Also, according to Anton, gcc 3.5 didn't like our mac_addr_p
gymnastics, so this ends up fixing that as well.

This patch fixes SMP boot on Apple Xserve G5

From: Stephen Rothwell <sfr@canb.auug.org.au>

It is possible to attach a virtual disk to a logical partition on an iSeries
machine so that it is read only to the partition.  This patch allows Linux to
use such virtual disks.

From: Paul Mackerras <paulus@samba.org>

After I sent the recent patch to include/asm-ppc64/io.h which put stronger
barriers in the I/O accessor macros, Paul McKenney pointed out to me that a
writex/outx could still slide out from inside a spinlocked region.  This patch
makes the barriers a bit stronger so that this can't happen.  It means that we
need to use a sync instruction for wmb (a full "heavyweight" sync), since
drivers rely on wmb for ordering between writes to system memory and writes to
a device.

I have left smb_wmb() as a lighter-weight barrier that orders stores, and
doesn't impose an ordering between cacheable and non-cacheable accesses (the
amusingly-named eieio instruction).  I am assuming here that smp_wmb is only
used for ordering stores to system memory so that another cpu will see them in
order.  It can't be used for enforcing any ordering that a device will see,
because it is just a gcc barrier on UP.

This also changes the spinlock/rwlock unlock code to use lwsync ("light-weight
sync") rather than eieio, since eieio doesn't order loads, and we need to
ensure that loads stay inside the spinlocked region.

From: Paul Mackerras <paulus@samba.org>

When I sent the patch to uninline the spinlocks, I inadvertently left out
the change to arch/ppc64/Kconfig which defines the config symbol for
inlining the locks (CONFIG_SPINLINE now).  This patch adds it.  It also
adds a symbol CONFIG_PPC_SPLPAR which enables the code for calling the
hypervisor on shared-processor logically-partitioned system to yield the
physical processor to the lock holder when spinning.  (The code that
depends on this symbol is already present in arch/ppc64/lib/locks.c.)

From: Anton Blanchard <anton@samba.org>

It turns out we do avoid irq recursion on iseries so remove the workaround.

From: Anton Blanchard <anton@samba.org>

We check nvram_fetch/nvram_store against -1, so better not make these
unsigned.

From: Anton Blanchard <anton@samba.org>

Based on feedback from the hardware guys align jiffies and tb_last_stamp.
We update both regularly and there are other read only, heavily accessed
things that share those cachelines.

From: Anton Blanchard <anton@samba.org>

We need to set MSR_RI in iseries exception prolog.

From: Anton Blanchard <anton@samba.org>

We were allocating radix tree nodes in the interrupt code with GFP_KERNEL
under a spinlock.  Change it to GFP_ATOMIC.

From: Paul Mackerras <paulus@samba.org>

The patch below moves some declarations from C files into the appropriate
header file in include/asm-ppc (and removes an unused local variable in a
function).

From: Paul Mackerras <paulus@samba.org>

Matt Porter's recent changes broke the compile for non-4xx ppc32 systems,
unfortunately.  I get an error that mfdcr is not defined in
include/asm-ppc/ocp.h when compiling for powermac (reasonable, since the
mfdcr instruction only exists on 4xx processors).  The patch below fixes
it.

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

Merge all current PPC44x ports against new OCP.

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

Merge all current PPC40x ports against new OCP.

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

Update all current 4xx defconfigs for new OCP.

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

Merge misc.  4xx core fixes and support for the new cascade scheme in the
440gx.