At present, if we have a kernel with a 64kB page size, and some
process maps something that has to be mapped with 4kB pages (such as a
cache-inhibited mapping on POWER5+, or the eHCA infiniband queue-pair
pages), we change the process to use 4kB pages everywhere.  This hurts
the performance of HPC programs that access eHCA from userspace.

With this patch, the kernel will only demote the slice(s) containing
the eHCA or cache-inhibited mappings, leaving the remaining slices
able to use 64kB hardware pages.

This also changes the slice_get_unmapped_area code so that it is
willing to place a 64k-page mapping into (or across) a 4k-page slice
if there is no better alternative, i.e. if the program specified
MAP_FIXED or if there is not sufficient space available in slices that
are either empty or already have 64k-page mappings in them.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Add a cputable entry for the POWER7 processor.

Also tell firmware that we know about POWER7.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

This was pointed out by Detlev Zundel when this code was being
added to U-boot.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

While working on the 36-bit physical support, I noticed that there
was exactly one line of code that actually referenced the bitfields.
So I got rid of them and redefined ppc_bat as a struct of 2 u32's:
batu and batl.  I also got rid of the previous union that held the
bitfield structs and a word representation of the batu/l values.

This seems like a nicer solution than adding in a bunch of
new bitfields to support extended bat addressing that would never
get used, and just leaving the struct as-is would have been
incomplete in the face of large physical addressing.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Currently, the physical address is an unsigned long, but it should
be phys_addr_t in set_bat, [v/p]_mapped_by_bat.  Also, create a
macro that can convert a large physical address into the correct
format for programming the BAT registers.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

There are now two potential callers of machine_crash_shutdown,
so increase the limit accordingly.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

We need to disable ptcal before starting a new kernel after a crash,
in order to avoid overwriting data in the kdump kernel.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

The pseries_kexec_setup function overwrites some ppc_md
pointers, so make sure it only gets called when running on
the right architecture.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

When kexec is disabled, the crash_shutdown_{un,}register
functions are not available in the kernel.
This provides dummy inline functions for those so that
the callers don't have to worry about it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

This frees a PTE bit when using 64K pages on ppc64.  This is done
by getting rid of the separate _PAGE_HASHPTE bit.  Instead, we just test
if any of the 16 sub-page bits is set.  For non-combo pages (ie. real
64K pages), we set SUB0 and the location encoding in that field.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

To avoid "#ifdef CONFIG_PCI" in the drivers we should provide stubs in
place of OF PCI address accessors.

Without these stubs build breaks for drivers not strictly requiring PCI,
for example CONFIG_FB_OF=y without CONFIG_PCI:

  LD      .tmp_vmlinux1
drivers/built-in.o: In function `offb_map_reg':
offb.c:(.text+0x6e7c): undefined reference to `of_get_pci_address'

OF PCI IRQ accessors require pci_dev argument, so drivers using PCI
IRQs should depend on CONFIG_PCI anyway.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

CROSS32AS and CROSS32LD are never used (instead, CROSS32CC is used
with proper command line options).

CROSS32OBJCOPY isn't used anymore either, since the "wrapper" stuff
was added.

Remove these unused variables.
Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Vitaly Bordug <vitb@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

This pushes the BKL down into the driver.  Based on a patch by Alan Cox.

We need to do it this way for now as the inode parameter of viotap_ioctl
is used internally as a flag.  We should do a further cleanup patch.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

For 64-bit processors, lwsync is the recommended method of store/store
ordering on caching enabled memory.  For those subarchs which have
lwsync, use it rather than eieio for smp_wmb.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (42 commits)
  V4L/DVB (8108): Fix open/close race in saa7134
  V4L/DVB (8100): V4L/vivi: fix possible memory leak in vivi_fillbuff
  V4L/DVB (8097): xc5000: check device hardware state to determine if firmware download is needed
  V4L/DVB (8096): au8522: prevent false-positive lock status
  V4L/DVB (8092): videodev: simplify and fix standard enumeration
  V4L/DVB (8075): stv0299: Uncorrected block count and bit error rate fixed
  V4L/DVB (8074): av7110: OSD transfers should not be interrupted
  V4L/DVB (8073): av7110: Catch another type of ARM crash
  V4L/DVB (8071): tda10023: Fix possible kernel oops during initialisation
  V4L/DVB (8069): cx18: Fix S-Video and Compsite inputs for the Yuan MPC718 and enable card entry
  V4L/DVB (8068): cx18: Add I2C slave reset via GPIO upon initialization
  V4L/DVB (8067): cx18: Fix firmware load for case when digital capture happens first
  V4L/DVB (8066): cx18: Fix audio mux input definitions for HVR-1600 Line In 2 and FM radio
  V4L/DVB (8063): cx18: Fix unintended auto configurations in cx18-av-core
  V4L/DVB (8061): cx18: only select tuner / frontend modules if !DVB_FE_CUSTOMISE
  V4L/DVB (8048): saa7134: Fix entries for Avermedia A16d and Avermedia E506
  V4L/DVB (8044): au8522: tuning optimizations
  V4L/DVB (8043): au0828: add support for additional USB device id's
  V4L/DVB (8042): DVB-USB UMT-010 channel scan oops
  V4L/DVB (8040): soc-camera: remove soc_camera_host_class class
  ...

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  dock: bay: Don't call acpi_walk_namespace() when ACPI is disabled.
  ACPI: don't walk tables if ACPI was disabled
  thermal: Create CONFIG_THERMAL_HWMON=n

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
  kbuild: fix a.out.h export to userspace with O= build.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: fw-sbp2: fix parsing of logical unit directories

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6:
  udf: Fix regression in UDF anchor block detection

Removed vmlinux* rule because it matches too many useful files, replacing
it with rules matching filetype by filename (e.g. *.gz). Also unignored
.mailmap from the top directory. Added a comment telling the user how to
check for tracked files being ignored.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6:
  Blackfin arch: fix up section mismatch warning
  Blackfin arch: fix bug - kernel boot fails when Spinlock and rw-lock debugging enabled

* 'audit.b52' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
  [PATCH] remove useless argument type in audit_filter_user()
  [PATCH] audit: fix kernel-doc parameter notation
  [PATCH] kernel/audit.c: nlh->nlmsg_type is gotten more than once

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  [patch 2/3] vfs: dcache cleanups
  [patch 1/3] vfs: dcache sparse fixes
  [patch 3/3] vfs: make d_path() consistent across mount operations
  [patch 4/4] flock: remove unused fields from file_lock_operations
  [patch 3/4] vfs: fix ERR_PTR abuse in generic_readlink
  [patch 2/4] fs: make struct file arg to d_path const
  [patch 1/4] vfs: path_{get,put}() cleanups
  [patch for 2.6.26 4/4] vfs: utimensat(): fix write access check for futimens()
  [patch for 2.6.26 3/4] vfs: utimensat(): fix error checking for {UTIME_NOW,UTIME_OMIT} case
  [patch for 2.6.26 1/4] vfs: utimensat(): ignore tv_sec if tv_nsec == UTIME_OMIT or UTIME_NOW
  [patch for 2.6.26 2/4] vfs: utimensat(): be consistent with utime() for immutable and append-only files
  [PATCH] fix cgroup-inflicted breakage in block_dev.c

We need to check for existence of the a.out.h header in the source tree,
not the object tree, if we want it to get the right answer with O=.
Signed-off-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Added DMA nodes for the elo/elo-plus DMA engines.

Renamed the interrupt controller alias in mpc832x_rdb.dts to ipic so that
its the same as all the other boards.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

There is a small off-by-one bug in firewire-sbp2. This causes problems
when a device exports multiple LUN Directories. I found it when trying
to talk to a SONY DVD Jukebox.
Signed-off-by: Richard Sharpe <realrichardsharpe@gmail.com>
Acked-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (op. order, changelog)

The saa7134 driver uses a (non-atomic) variable in an attempt to
only allow one opener of the device (how it deals with sending
the fd over unix sockets I don't know).

Unfortunately, the release function first decrements this variable,
and THEN goes on to disable more of the device. This allows for
a race where another opener of the device comes in after the decrement of
the variable, configures the hardware just to then see the hardware
be disabled by the rest of the release function.

This patch makes the release function use the same lock as the open
function to protect the hardware as well as the variable (which now
at least has some locking to protect it).
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Move allocation after first check and fix memory leak.
Noticed-by: Daniel Marjamäki <danielm77@spray.se>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

This patch ensures that the xc5000 will have firmware loaded as needed if the
part is powered down or reset via gpio from the host. An example of this, in
some cases, could be after the system resumes from standby or hibernate modes.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>