From: Paul Mackerras <paulus@samba.org>

This patch updates several of the ppc32 defconfigs.

From: Paul Mackerras <paulus@samba.org>

On machines with Altivec (i.e.  G4 and G5 processors), the altivec
floating-point instructions can operate in two modes: one where
denormalized inputs or outputs are truncated to zero, and one where they
aren't.  In the latter mode the processor can take an exception when it
encounters denormalized floating-point inputs or outputs rather than
dealing with them in hardware.

This patch adds code to deal properly with the exception, by emulating the
instruction that caused the exception.  Previously the kernel just switched
the altivec unit into the truncate-to-zero mode, which works but is a bit
gross.  Fortunately there are only a limited set of altivec instructions
which can generate the assist exception, so we don't have to emulate the
whole altivec instruction set.

This patch also makes sure that we always have a handler for the altivec
unavailable exception.  Without this, if you run a kernel that is not
configured for altivec support on a machine with altivec, it works fine
until a user process tries to execute an altivec instruction.  At that
point the kernel thinks it has taken an unknown exception and panics.  With
this patch it sends a SIGILL to the process instead.

From: Paul Mackerras <paulus@samba.org>

This patch does nothing but fix up whitespace in three files in arch/ppc.
It deletes trailing blanks and tabs in several places and joins two lines
that didn't need to be split.

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

From: Bryan Rittmeyer <bryan@staidm.org>

This patch adds preliminary support for the IBM PowerPC 750GX.  In summary
this part is a PPC750FX ramped to 1 GHz with a 1MB 4-way L2 and more
advanced I/O pipelining.  It is beginning to appear in embedded systems and
was rumored to be under evaluation inside Apple.  Tested on PVR 70020101;
please merge.

http://www-3.ibm.com/chips/techlib/techlib.nsf/products/PowerPC_750GX_Microprocessor

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

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

arch/ppc64/lib/locks.c was recently added by Paulus' lock rewrite. It's
always compiled, which breaks non-SMP builds. Below patch makes it depend
on CONFIG_SMP.

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

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

into kroah.com:/home/greg/linux/BK/usb-2.6

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

into flint.arm.linux.org.uk:/usr/src/bk/linux-2.6-rmk

This re-jigs atomic.h by providing atomic_add_return and
atomic_sub_return as other architectures do.  This allows us to
implement the atomic ops that test the new value without having
to write the underlying atomic operation in various forms.

Patch from: Ian Campbell

This changes the atomic_t in struct page named count into a private
member _count which breaks arch/arm/mm/init.c at line 80 which reads
page->count directly in show_mem().
                                                                                
The comments in the above changeset suggest that page_count(page) is
precisely equal to the old page->count semantics, even though the
semantics of _count are different, so I think the following is correct

Doesn't anyone ever actually build the patches they send me...

this makes the core use the new safe waiting helper.

  - remove wait_ms from hub driver

this is a new waiting helper safe even if we are left on a waitqueue.
This version addresses Alan's concerns about ifdefs. Please apply.

  - add delay helper that is safe even if we are still on another waitqueue

This resolves a FIXME by adding module parameters that can
be used to provide stable (vs random) addresses, and gets
rid of a runtime error from obsolete module parameter usage
in the RNDIS code.

The stable ethernet addresses are nice to hosts, which will
normally want to save them away in config databases.  For
example, without stable addresses Windows XP will end up
recording quite a lot of RNDIS devices.

This should fix the problem David Meggy found, where RNDIS was setting
the OID_GEN_CURRENT_PACKET_FILTER state incorrectly.  It's the same
issue Andrew Morton noticed a while back, for that matter, but with
more than just a "now compiles on 64 bit" fix.

Basically the code needs to interpret 32 bits provided in the request
from the (Windows) host, rather than 8 bits of other memory that's got
some irrelevant value.

The fix is just to save the 32 bits.  I did the same thing with the
CDC Ethernet filter, which should eventually be used the same way:  to
limit what packets get sent to the host.  Also defined a couple more
of the CDC requests.

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

into redhat.com:/spare/repo/net-drivers-2.6

into redhat.com:/spare/repo/net-drivers-2.6

I made a mistake fixing that driver. Here's the fix. Please apply soon.

  - fix race condition leading to busy waiting

Here are some MSEC_TO_JIFFIES() fixes missed by whoever did it,
plus a minor fix to grab root_hub->serialize() during OHCI
suspend.  (I forgot to cut/paste those lines from resume.)

drivers/scsi/hosts.h is obsolete, <scsi/scsi_host.h> is the prefered header
nowadays. (hosts.h is just a 1 line wrapper to include it for now anyway)

No usb serial devices, just compiled in and the system has a USB controller.

Unable to handle kernel NULL pointer dereference at virtual address 0000000c
 printing eip:
c046a188
*pde = 00000000
Oops: 0000 [#1]
PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU:    0
EIP:    0060:[<c046a188>]    Not tainted VLI
EFLAGS: 00010246   (2.6.6-mm3)
EIP is at serial_open+0x38/0x170
eax: 00000000   ebx: dc883000   ecx: c0613db8   edx: 00000000
esi: 00000001   edi: 00000000   ebp: dc84cef0   esp: dc84cedc
ds: 007b   es: 007b   ss: 0068
Process serial (pid: 1073, threadinfo=dc84c000 task=ddffca50)
Stack: 00000000 de8f4f5c ffffffed 00000100 de8f4f5c dc84cf14 c035a874 090115a0
       0bc00000 dc883000 00000000 de8f4f5c 00000001 df8a2dfc dc84cf40 c0171270
       dc84c000 00000001 00000000 de8f4f5c dbc75e94 00000000 de8f4f5c dbc75e94
Call Trace:
 [<c01076c5>] show_stack+0x75/0x90
 [<c010781f>] show_registers+0x11f/0x180
 [<c01079c6>] die+0xb6/0x170
 [<c011af20>] do_page_fault+0x1e0/0x525
 [<c010732d>] error_code+0x2d/0x40
 [<c035a874>] tty_open+0x274/0x3b0
 [<c0171270>] chrdev_open+0x160/0x340
 [<c0166426>] dentry_open+0x156/0x230
 [<c01662cd>] filp_open+0x4d/0x50
 [<c0166858>] sys_open+0x38/0x70
 [<c0106199>] sysenter_past_esp+0x52/0x79

Code: de 63 c0 89 55 f0 c7 45 ec 00 00 00 00 85 f6 0f 85 31 01 00 00 c7 83
8c 09 00 00 00 00 00 00 8b 43 08 e8 3c fe ff ff 31 d2 89 c7 <8a> 50 0c 8b
43 08 29 d0 8b 74 87 18 89 b3 8c 09 00 00 89 5e 04

(gdb) list *serial_open+0x38
0xc046a188 is in serial_open (drivers/usb/serial/usb-serial.c:465).
460
461             /* get the serial object associated with this tty pointer */
462             serial = usb_serial_get_by_index(tty->index);
463
464             /* set up our port structure making the tty driver remember our port object, and us it */
465             portNumber = tty->index - serial->minor;
466             port = serial->port[portNumber];
467             tty->driver_data = port;
468
469             port->tty = tty;

Thanks to Adrian Bunk <bunk@fs.tum.de> for pointing this out.

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.