Neither request_OF_resource or release_OF_resource are defined
anywhere.  Remove the declarations.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

Both allnodes and devtree_lock are defined in common code.  The
extern declaration should be in the common header too so that the
compiler can type check.  allnodes is already in of.h, but
devtree_lock should be declared there too.

This patch removes the SPARC declarations and uses decls in of.h instead.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: David S. Miller <davem@davemloft.net>

Rather than defining of_chosen in each arch, it can be defined for all
in driver/of/base.c
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

Neither the powerpc nor the microblaze code use devtree_lock anymore.
Remove the extern reference.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

Most architectures don't need to change these.  Put them into common
code to eliminate some duplication
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

We don't always have lmb available, so make arches provide an
early_init_dt_alloc_memory_arch() to handle the allocation of
memory in the fdt code.

When we don't have lmb.h included, we need asm/page.h for __va.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

For platforms that have CONFIG_OF optional, we need to make the contents
of linux/of.h conditional on CONFIG_OF.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

Commit e22f6283 introduced a build
breakage for ARM devtree work: the THIS_MODULE macro was added, but we
don't have module.h

This change adds the necessary #include to get THIS_MODULE defined.
While we could just replace it with NULL (PROC_FS is a bool, not a
tristate), using THIS_MODULE will prevent unexpected breakage if we
ever do compile this as a module.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

The following functions don't exist:
  finish_device_tree()
  print_properties()
  prom_n_intr_cells()
  prom_get_irq_senses()

The following functions are in drivers/of/base.c, so the declaration
belongs in of.h instead of of_fdt.h
  of_machine_is_compatible()
  prom_add_property()
  prom_remove_property()
  prom_update_property()
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michal Simek <monstr@monstr.eu>

Currently when processing flattened device trees, the kernel expects
the phandle in a property called "linux,phandle".  The ePAPR spec -
not being Linux specific - instead requires phandles to be encoded in
a property named simply "phandle".  This patch makes the kernel accept
either form when unflattening the device tree.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

The boot_param_header has big-endian fields, so change the types to
__be32, and perform endian conversion when we access them.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Properties in the device tree are specified as big-endian. At present,
the only platforms to support device trees are also big-endian, so we've
been acessing the properties as raw values.

We'd like to add device tree support to little-endian platforms too, so
add endian conversion to the sites where we access property values in
the common of code.

Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt
support only for now).
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Currently, we're using u32 for cell values, and hence assuming
host-endian device trees.

As we'd like to support little-endian platforms, use a __be32 for cell
values, and convert in the cell accessors.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

At present we're using hard-coded values for defaults when parsing the
FDT. This change uses the #defines instead.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

At present, the fdt code sets the kernel-wide initrd_start and
initrd_end variables when parsing /chosen. On ARM, we only set these
once the bootmem has been reserved.

This change adds an arch hook to setup the initrd from the device
tree:

 void early_init_dt_setup_initrd_arch(unsigned long start,
				      unsigned long end);

The arch-specific code can then setup the initrd however it likes.

Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Currenly, proc_devtree.c depends on asm/prom.h to include linux/of.h, to
provide some device-tree definitions (eg, struct property).

Instead, include linux/of.h directly. We still need asm/prom.h for
HAVE_ARCH_DEVTREE_FIXUPS.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

We only need set_node_proc_entry in proc_devtree.c, so move it there.

This fixes the !HAVE_ARCH_DEVTREE_FIXUPS build, as we can't make make
the definition in linux/of.h conditional on this #define (definitions in
asm/prom.h can't be exposed to linux/of.h, due to the enforced #include
ordering).
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

We use a few procfs-specific functions (eg, proc_device_tree_*) which
aren't covered by the current includes. This causes the following build
error on arm:

drivers/of/base.c: In function 'prom_add_property':
drivers/of/base.c:861: error: implicit declaration of function 'proc_device_tree_add_prop'
drivers/of/base.c: In function 'prom_remove_property':
drivers/of/base.c:902: error: implicit declaration of function 'proc_device_tree_remove_prop'
drivers/of/base.c: In function 'prom_update_property':
drivers/of/base.c:946: error: implicit declaration of function 'proc_device_tree_update_prop'

Add proc_fs.h for these prototypes.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Merge common code between PowerPC and Microblaze architectures.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>

machine is compatible is an OF-specific call.  It should have
the of_ prefix to protect the global namespace.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>

Merge common function between powerpc, sparc and microblaze. Code is
identical for powerpc and microblaze, but adds a lock (and release) of
the devtree_lock on sparc.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Merge common code between PowerPC and Microblaze
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Microblaze only has one CPU, it isn't SMP at all.  early_init_dt_scan_cpus()
is effectively just a no-op, so remove it.

Microblaze doesn't support hypervisor assisted dump either, so the phyp stuff
can also go.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>

In struct device_node, the phandle is named 'linux_phandle' for PowerPC
and MicroBlaze, and 'node' for SPARC.  There is no good reason for the
difference, it is just an artifact of the code diverging over a couple
of years.  This patch renames both to simply .phandle.

Note: the .node also existed in PowerPC/MicroBlaze, but the only user
seems to be arch/powerpc/platforms/powermac/pfunc_core.c.  It doesn't
look like the assignment between .linux_phandle and .node is
significantly different enough to warrant the separate code paths
unless ibm,phandle properties actually appear in Apple device trees.

I think it is safe to eliminate the old .node property and use
phandle everywhere.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Merge common code between PowerPC and MicroBlaze
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Merge common code between PowerPC and Microblaze
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: x86: Add support for the ANY bit
  perf: Change the is_software_event() definition
  perf: Honour event state for aux stream data
  perf: Fix perf_event_do_pending() fallback callsite
  perf kmem: Print usage help for unknown commands
  perf kmem: Increase "Hit" column length
  hw-breakpoints, perf: Fix broken mmiotrace due to dr6 by reference change
  perf timechart: Use tid not pid for COMM change

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Reassign prev and switch_count when reacquire_kernel_lock() fail
  sched: Fix vmark regression on big machines

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: retry FS IOs even if it has failed with AC_ERR_INVALID

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  tty: fix race in tty_fasync
  serial: serial_cs: oxsemi quirk breaks resume
  serial: imx: bit &/| confusion
  serial: Fix crash if the minimum rate of the device is > 9600 baud
  serial-core: resume serial hardware with no_console_suspend
  serial: 8250_pnp: use wildcard for serial Wacom tablets
  nozomi: quick fix for the close/close bug
  compat_ioctl: Supress "unknown cmd" message on serial /dev/console

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: hv: fix smp problems in the hyperv core code
  Staging: et131x: Fix 2.6.33rc1 regression in et131x
  Staging: asus_oled: fix oops in 2.6.32.2

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  Revert "sysdev: fix prototype for memory_sysdev_class show/store functions"
  driver-core: fix devtmpfs crash on s390

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: isp1362: fix build failure on ARM systems via irq_flags cleanup
  USB: isp1362: better 64bit printf warning fixes
  USB: fix usbstorage for 2770:915d delivers no FAT
  USB: Fix level of isp1760 Reloading ptd error message
  USB: FHCI: avoid NULL pointer dereference
  USB: Fix duplicate sysfs problem after device reset.
  USB: add speed values for USB 3.0 and wireless controllers
  USB: add missing delay during remote wakeup
  USB: EHCI & UHCI: fix race between root-hub suspend and port resume
  USB: EHCI: fix handling of unusual interrupt intervals
  USB: Don't use GFP_KERNEL while we cannot reset a storage device
  USB: fix bitmask merge error
  usb: serial: fix memory leak in generic driver
  USB: serial: fix USB serial fix kfifo_len locking

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  fs/bio.c: fix shadows sparse warning
  drbd: The kernel code is now equivalent to out of tree release 8.3.7
  drbd: Allow online resizing of DRBD devices while peer not reachable (needs to be explicitly forced)
  drbd: Don't go into StandAlone mode when authentification failes because of network error
  drivers/block/drbd/drbd_receiver.c: correct NULL test
  cfq-iosched: Respect ioprio_class when preempting
  genhd: overlapping variable definition
  block: removed unused as_io_context
  DM: Fix device mapper topology stacking
  block: bdev_stack_limits wrapper
  block: Fix discard alignment calculation and printing
  block: Correct handling of bottom device misaligment
  drbd: check on CONFIG_LBDAF, not LBD
  drivers/block/drbd: Correct NULL test
  drbd: Silenced an assert that could triggered after changing write ordering method
  drbd: Kconfig fix
  drbd: Fix for a race between IO and a detach operation [Bugz 262]
  drbd: Use drbd_crypto_is_hash() instead of an open coded check

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (23 commits)
  ACPI: delete acpi_processor_power_verify_c2()
  ACPI: allow C3 > 1000usec
  ACPI: enable C2 and Turbo-mode on Nehalem notebooks on A/C
  ACPI: power_meter: remove double kfree()
  ACPI: processor: restrict early _PDC to opt-in platforms
  ACPI: Fix unused variable warning in sbs.c
  acpi: make ACPI device id constant
  sony-laptop - fix using of uninitialized variable
  ACPI: Fix section mismatch error for acpi_early_processor_set_pdc()
  eeepc-laptop: disable wireless hotplug for 1201N
  eeepc-laptop: add hotplug_disable parameter
  eeepc-laptop: switch to using sparse keymap library
  eeepc-laptop: dmi blacklist to disable pci hotplug code
  eeepc-laptop: disable cpu speed control on EeePC 701
  ACPI: don't cond_resched if irq is disabled
  ACPI: Remove unnecessary cast.
  ACPI: Advertise to BIOS in _OSC: _OST on _PPC changes
  ACPI: EC: Add wait for irq storm
  ACPI: SBS: Move SBS HC callback to faster Notify queue
  x86, ACPI: delete acpi_boot_table_init() return value
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6:
  ecryptfs: use after free
  ecryptfs: Eliminate useless code
  ecryptfs: fix interpose/interpolate typos in comments
  ecryptfs: pass matching flags to interpose as defined and used there
  ecryptfs: remove unnecessary d_drop calls in ecryptfs_link
  ecryptfs: don't ignore return value from lock_rename
  ecryptfs: initialize private persistent file before dereferencing pointer
  eCryptfs: Remove mmap from directory operations
  eCryptfs: Add getattr function
  eCryptfs: Use notify_change for truncating lower inodes

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: fix possible panic on unmount
  Btrfs: deal with NULL acl sent to btrfs_set_acl
  Btrfs: fix regression in orphan cleanup
  Btrfs: Fix race in btrfs_mark_extent_written
  Btrfs, fix memory leaks in error paths
  Btrfs: align offsets for btrfs_ordered_update_i_size
  btrfs: fix missing last-entry in readdir(3)

In free_unmap_area_noflush(), va->flags is marked as VM_LAZY_FREE first, and
then vmap_lazy_nr is increased atomically.

But, in __purge_vmap_area_lazy(), while traversing of vmap_are_list, nr
is counted by checking VM_LAZY_FREE is set to va->flags.  After counting
the variable nr, kernel reads vmap_lazy_nr atomically and checks a
BUG_ON condition whether nr is greater than vmap_lazy_nr to prevent
vmap_lazy_nr from being negative.

The problem is that, if interrupted right after marking VM_LAZY_FREE,
increment of vmap_lazy_nr can be delayed.  Consequently, BUG_ON
condition can be met because nr is counted more than vmap_lazy_nr.

It is highly probable when vmalloc/vfree are called frequently.  This
scenario have been verified by adding delay between marking VM_LAZY_FREE
and increasing vmap_lazy_nr in free_unmap_area_noflush().

Even the vmap_lazy_nr is for checking high watermark, it never be the
strict watermark.  Although the BUG_ON condition is to prevent
vmap_lazy_nr from being negative, vmap_lazy_nr is signed variable.  So,
it could go down to negative value temporarily.

Consequently, removing the BUG_ON condition is proper.

A possible BUG_ON message is like the below.

   kernel BUG at mm/vmalloc.c:517!
   invalid opcode: 0000 [#1] SMP
   EIP: 0060:[<c04824a4>] EFLAGS: 00010297 CPU: 3
   EIP is at __purge_vmap_area_lazy+0x144/0x150
   EAX: ee8a8818 EBX: c08e77d4 ECX: e7c7ae40 EDX: c08e77ec
   ESI: 000081fe EDI: e7c7ae60 EBP: e7c7ae64 ESP: e7c7ae3c
   DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
   Call Trace:
   [<c0482ad9>] free_unmap_vmap_area_noflush+0x69/0x70
   [<c0482b02>] remove_vm_area+0x22/0x70
   [<c0482c15>] __vunmap+0x45/0xe0
   [<c04831ec>] vmalloc+0x2c/0x30
   Code: 8d 59 e0 eb 04 66 90 89 cb 89 d0 e8 87 fe ff ff 8b 43 20 89 da 8d 48 e0 8d 43 20 3b 04 24 75 e7 fe 05 a8 a5 a3 c0 e9 78 ff ff ff <0f> 0b eb fe 90 8d b4 26 00 00 00 00 56 89 c6 b8 ac a5 a3 c0 31
   EIP: [<c04824a4>] __purge_vmap_area_lazy+0x144/0x150 SS:ESP 0068:e7c7ae3c

[ See also http://marc.info/?l=linux-kernel&m=126335856228090&w=2 ]
Signed-off-by: Yongseok Koh <yongseok.koh@samsung.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>