This patch, from John Rose, is the counterpart of one recently
forwarded by Greg KH.  It has the same description, but isn't the same
patch - this is the arch/ppc64 part of the change.

As an unfortunate side effect of runtime addition/removal of PCI Host Bridges,
the RPA DLPAR driver can no longer depend on the success of ioremap_explicit()
(and therefore remap_page_range()) for the case of DLPAR adding an I/O Slot.  

Without addressing this, an attempt to add the first child slot of a newly
added PHB will fail when __ioremap_explicit() determines the mappings for that
range to already exist.

For a little context, __ioremap_explicit() creates mappings for the range of a
newly added slot.  Here's why these calls will be expected to fail in some
cases.  Keep in mind that at boot-time, the PPC64 kernel calls ioremap() for
the entire range spanned by each PHB.  Consider the following scenarios of
DLPAR-adding an I/O slot.

1) Just after boot, one removes an I/O slot.  At this point the range
   associated with the parent PHB is fragmented, and the child range for the
   slot in question is iounmap()'ed.  One then re-adds the slot, at which point
   remap_page_range()/ioremap_explicit() restores the mappings that were
   previously removed.

2) One adds a new PHB, at which point the ppc64-specific addition ioremaps the
   entire PHB range.  One then performs a DLPAR-add of a child slot of that
   PHB.  At this point, mappings already exist for the range of the slot to
   be added.  So remap_page_range()/ioremap_explicit() will fail at this point.

The problem is, there's not a good way to distinguish between cases 1 and 2
from the perspective of the DLPAR driver.  Because of that, I believe the
correct solution to be:

- Removal of relevant error prints from iounmap_explicit(), which is only used
  for DLPAR.
- Removal of error code checks from the RPA driver

Here's the first of these.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

ioremap() made inlined function on sparc64; that had caught one bogosity in
drivers, actually - cpwatchdog.c passed sizeof(structure that was never
declared) as the second argument to ioremap().  It went unnoticed since
that argument was never used in the body of macro, so it disappeared without
a trace...
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

	A bunch of places passes volatile pointers to readb() et.al.;
sparc64 has their arguments declared as void __iomem *.  Prototypes
changed to match other platforms.
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

sparse complains on casts from long to pointers; unsigned long is OK, though,
and it's OK with all numeric cases.
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Some drivers do ifdef on writeq; alpha has it as inline function, so they
get confused.
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

It is not needed any longer:
* PIO code is unified and converted to use scatterlists
* taskfile code doesn't support falling back to PIO
* it is much easier to convert non-taskfile version of
  __ide_do_rw_disk() to something sane than taskfile one
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

All users of this code were fixed to use scatterlists.

Acked by Jens.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Sigh, I broke it by accident 16 months ago and nobody has noticed
(I suspect that it was non-functional even earlier).

Additionally, this driver:
* should be converted to use scatterlists
* has verbose debugging enabled by default
* needs hacks all over IDE code
* is guilty of crimes against ide_hwifs[]

Just remove it for now.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Based on input from Roland McGrath and Hugh Dickins.

This simplifies the logic, and takes advantage of the
"new" VM information in the form of vma->anon_vma.

Rather than the deprecated remap_page_range() function
that can't handle all of the PFN range anyway.

Also, since that will now mark the vma as being special,
there's no need to do it in mmap_mem() any more.

VM_IO tells the rest fo the world that the pages may
have side effects on reads/writes etc, and VM_RESERVED
historically told swap-out not to bother with it.

It was pointed out to me that I typo'd and lost a backslash in the
PA-RISC io_remap_page_range() definition. This patch corrects the
one-character typo.

Here is the hangup implementation for ppp_synctty.c (same as patch
previously for ppp_asynctty.c)

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

Use %p to print a pointer, so that its length doesn't matter
and so that gcc won't complain.

drivers/mtd/maps/dilnetpc.c:416: warning: long unsigned int format, pointer arg (arg 2)
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

I reviewed, patched, and tested ppp_async.c to implement
ldisc->hangup().  This correctly terminates the PPP connection on
hangup.

Paul Mackerras already did an excellent job of ensuring safe shutdown
and I/O completion in ldisc->close so the change is trivial: just add
the ldisc->hangup and call the existing close routine.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

Below is a patch from Denis Zaitsev <zzz@anda.ru> with the following two
adjustments:

- applies with -p1 (not -p0)

- USRobotics -> U.S. Robotics (consistent with the rest of the entries)
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The MIPS Makefile was changed so that the offset of data section may not be
dependent on a specific machine header file.
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

One more place in fs/proc/array.c where ppid is wrong, which I missed in my
previous mail to lkml.
Signed-off-by: Dinakar Guniguntala <dino@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: <Urban.Widmark@enlight.net>

The memset is because it was previously possible to send always the same CIFS
fragment and use this to increase the data counters.  When the data counter
"exceeds" the amount of bytes expected this will return the buffer only
partially initialised...  With findfirst etc requests this should allow
leaking kernel memory content.

The other thing is that the data is only returned when data_tot and parm_tot
both "exceed" the expected values.  Previously it was possible to create a
sequence of CIFS fragments that allowed exceeding the counters.  The calling
functions then would believe they received a number of bytes that does not fit
into the allocated buffer.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

When a system has a very large imbalance of overall memory size to
ZONE_NORMAL (for example when large amounts of numa remap space are in use)
page_writeback_init() may incorrectly set vm_dirty_ratio and
dirty_background_ratio to zero; leading to divide by zero errors elsewhere.
This patch bounds these at 1%.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Error: ./drivers/media/video/cx88/cx88-video.o .data refers to 0000000000000b28 R_X86_64_64       .exit.text
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Error: ./drivers/media/dvb/bt8xx/bt878.o .data refers to 0000000000000048 R_X86_64_64       .exit.text
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Error: ./drivers/media/video/saa7134/saa7134-core.o .data refers to 0000000000000028 R_X86_64_64       .exit.text
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Here is a patch for M32R SIO driver, which replaces deprecated 
MODULE_PARAM() with modern module_param().

	* drivers/serial/m32r_sio.c:
	- Replace MODULE_PARAM() with module_param().
	- Fix a typo: UARRT_RSA_BASE --> UART_RSA_BASE.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

In ia32 emulation, the amd64 kernel refuses the ioctls TIOCSBRK and
TIOCCBRK with EINVAL.  I've attached a patch that adds them to the
compatibility list.

Since all architectures have these ioctls ("m68knommu" inherits them from
"m68k", "um" from its host) and use the same code, I think adding them to
compat_ioctl.h is the correct choice (as opposed to adding them to
arch/x86_64/ia32/ia32_ioctl.c).
Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

There seems to have been a couple of thinkos in the NUMA init code, in
particular in find_cpu_node():

* Property size returned is in bytes, not words
* Off-by-one error in loop iteration
Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Olof Johansson <olof@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

When the generic IRQ patch went in, it changed the behaviour of setup_irq
(compared to the previous ppc64 version) in that we now don't call the
handler's enable function if it has a startup function.  The XICS interrupt
controller has a startup function, and so we weren't getting any interrupts
through the XICS because they never got enabled.  This patch adds a call to
xics_enable_irq to xics_startup and fixes the problem.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

One of the iSeries specific files used HZ without including linux/param.h
and previously got away with it.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix ibm44x_common.c compile.
Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Recent changes to arch/ppc/boot/lib/Makefile cause

      CC      arch/ppc/boot/lib/../../../../lib/zlib_inflate/infblock.o
    Assembler messages:
    FATAL: can't create arch/ppc/boot/lib/../../../../lib/zlib_inflate/infblock.o: No such file or directory

when building a ppc kernel using O=$(output_dir) with CONFIG_ZLIB_INFLATE=n,
because the $(output_dir)/lib/zlib_inflate directory doesn't get created.

This patch, which makes arch/ppc/boot/lib/Makefile create the
directory if needed, is one fix for the problem.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch removes the bogus workaround for dcache prefetch beyond the end
of the physical memory.
Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>