The bitops functions (e.g. _test_and_set_bit) on ARM do not have unwind
annotations and therefore the kernel cannot backtrace out of them on a
fatal error (for example, NULL pointer dereference).

This patch annotates the bitops assembly macros with UNWIND annotations
so that we can produce a meaningful backtrace on error. Callers of the
macros are modified to pass their function name as a macro parameter,
enforcing that the macros are used as standalone function implementations.
Acked-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Fix compilation failure, when Thumb support is not enabled:

arch/arm/kernel/entry-armv.S: Assembler messages:
arch/arm/kernel/entry-armv.S:501: Error: backward ref to unknown label "2:"
arch/arm/kernel/entry-armv.S:502: Error: backward ref to unknown label "3:"
make[2]: *** [arch/arm/kernel/entry-armv.o] Error 1
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

There are already cache type decoding functions, so use those instead
of custom decode code which only works for ARMv6.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Attempting to use a hardware counter on a platform with a supported PMU
but where the platform_device (defining the interrupts) has not been
registered results in a NULL pointer dereference.

This patch fixes the problem by checking that we actually have a platform
device registered before attempting to grab the interrupts.
Reported-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

Commit 99d1717d (ARM: Add init_consistent_dma_size()) introduces dynamic
allocation of the consistent_pte array. The number of PTEs should be
calculated based on the number of PMD entries rather than PGD, hence the
PMD_SHIFT.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

scctl should be shifted by CC_SRCCTRL_SHFT and dcctl by

CC_DSTCCTRL_SHFT, not the other way round.

Reference: <1320244259-10496-4-git-send-email-javi.merino@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

When the manager is running non-secure, the only channels that can
issue interrupts are the ones that have a 1 in their corresponding bit
in Configuration Register 3. The other ones will generate an abort
when trying to signal the end of the transaction so they are useless
in non-secure mode.

Reference: <1320244259-10496-2-git-send-email-javi.merino@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

The Kconfig options for the PL310 errata workarounds do not use a
consistent naming scheme for either the config option or the bool
description.

This patch tidies up the options by ensuring that the bool descriptions
are prefixed with "PL310 errata:" and the config options are prefixed
with PL310_ERRATA_, making it much clearer in menuconfig as to what the
workarounds are for.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

This patch implements a workaround for PL310 erratum 769419. On
revisions of the PL310 prior to r3p2, the Store Buffer does not
automatically drain. This can cause normal, non-cacheable writes to be
retained when the memory system is idle, leading to suboptimal I/O
performance for drivers using coherent DMA.

This patch adds an optional wmb() call to the cpu_idle loop. On systems
with an outer cache, this causes an explicit flush of the store buffer.

Cc: stable@vger.kernel.org
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (86 commits)
  ipv4: fix redirect handling
  ping: dont increment ICMP_MIB_INERRORS
  sky2: fix hang in napi_disable
  sky2: enforce minimum ring size
  bonding: Don't allow mode change via sysfs with slaves present
  f_phonet: fix page offset of first received fragment
  stmmac: fix pm functions avoiding sleep on spinlock
  stmmac: remove spin_lock in stmmac_ioctl.
  stmmac: parameters auto-tuning through HW cap reg
  stmmac: fix advertising 1000Base capabilties for non GMII iface
  stmmac: use mdelay on timeout of sw reset
  sky2: version 1.30
  sky2: used fixed RSS key
  sky2: reduce default Tx ring size
  sky2: rename up/down functions
  sky2: pci posting issues
  sky2: fix hang on shutdown (and other irq issues)
  r6040: fix check against MCRO_HASHEN bit in r6040_multicast_list
  MAINTAINERS: change email address for shemminger
  pch_gbe: Move #include of module.h
  ...

* 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM guest: prevent tracing recursion with kvmclock
  Revert "KVM: PPC: Add support for explicit HIOR setting"
  KVM: VMX: Check for automatic switch msr table overflow
  KVM: VMX: Add support for guest/host-only profiling
  KVM: VMX: add support for switching of PERF_GLOBAL_CTRL
  KVM: s390: announce SYNC_MMU
  KVM: s390: Fix tprot locking
  KVM: s390: handle SIGP sense running intercepts
  KVM: s390: Fix RUNNING flag misinterpretation

* 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
  ARM: wire up process_vm_writev and process_vm_readv syscalls
  ARM: 7160/1: setup: avoid overflowing {elf,arch}_name from proc_info_list
  ARM: 7158/1: add new MFP implement for NUC900
  ARM: 7157/1: fix a building WARNING for nuc900
  ARM: 7156/1: l2x0: fix compile error on !CONFIG_USE_OF
  ARM: 7155/1: arch.h: Declare 'pt_regs' locally
  ARM: 7154/1: mach-bcmring: fix build error in dma.c
  ARM: 7153/1: mach-bcmring: fix build error in core.c
  ARM: 7152/1: distclean: Remove generated .dtb files
  ARM: 7150/1: Allow kernel unaligned accesses on ARMv6+ processors
  ARM: 7149/1: spi/pl022: Enable clock in probe
  Revert "ARM: 7098/1: kdump: copy kernel relocation code at the kexec prepare stage"

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / Suspend: Fix bug in suspend statistics update
  PM / Hibernate: Fix the early termination of test modes
  PM / shmobile: Fix build of sh7372_pm_init() for CONFIG_PM unset
  PM Sleep: Do not extend wakeup paths to devices with ignore_children set
  PM / driver core: disable device's runtime PM during shutdown
  PM / devfreq: correct Kconfig dependency
  PM / devfreq: fix use after free in devfreq_remove_device
  PM / shmobile: Avoid restoring the INTCS state during initialization
  PM / devfreq: Remove compiler error after irq.h update
  PM / QoS: Properly use the WARN() macro in dev_pm_qos_add_request()
  PM / Clocks: Only disable enabled clocks in pm_clk_suspend()
  ARM: mach-shmobile: sh7372 A3SP no_suspend_console fix
  PM / shmobile: Don't skip debugging output in pd_power_up()

Prevent tracing of preempt_disable() in get_cpu_var() in
kvm_clock_read(). When CONFIG_DEBUG_PREEMPT is enabled,
preempt_disable/enable() are traced and this causes the function_graph
tracer to go into an infinite recursion. By open coding the
preempt_disable() around the get_cpu_var(), we can use the notrace
version which prevents preempt_disable/enable() from being traced and
prevents the recursion.

Based on a similar patch for Xen from Jeremy Fitzhardinge.
Tested-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Avi Kivity <avi@redhat.com>

Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (exynos4_tmu) Fix Kconfig dependency

[ Merging code in-flight, just because I can.  What timezone should I
  use?  - Linus ]

After commit 2a77c46d
(PM / Suspend: Add statistics debugfs file for suspend to RAM)
a missing pair of braces inside the state_store() function causes even
invalid arguments to suspend to be wrongly treated as failed suspend
attempts. Fix this.

[rjw: Put the hash/subject of the buggy commit into the changelog.]
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

No longer at Citrix, still interested in Xen.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Dummy, non-zero definitions for HPAGE_MASK and HPAGE_SIZE were added in
51c6f666 ("mm: ZAP_BLOCK causes redundant work") to avoid a divide
by zero in generic kernel code.

That code has since been removed, but probably should never have been
added in the first place: we don't want HPAGE_SIZE to act like PAGE_SIZE
for code that is working with hugepages, for example, when the
dependency on CONFIG_HUGETLB_PAGE has not been fulfilled.

Because hugepage size can differ from architecture to architecture, each
is required to have their own definitions for both HPAGE_MASK and
HPAGE_SIZE.  This is always done in arch/*/include/asm/page.h.

So, just remove the dummy and dangerous definitions since they are no
longer needed and reveals the correct dependencies.  Tested on
architectures using the definitions with allyesconfig: x86 (even with
thp), hppa, mips, powerpc, s390, sh3, sh4, sparc, and sparc64, and with
defconfig on ia64.
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  new helper: mount_subtree()
  switch create_mnt_ns() to saner calling conventions, fix double mntput() in nfs
  btrfs: fix double mntput() in mount_subvol()

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  MAINTAINERS: update XFS maintainer entry
  xfs: use doalloc flag in xfs_qm_dqattach_one()

* 'for-3.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Replace Paul Menage with Tejun Heo as cgroups maintainer

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  random: Fix handing of arch_get_random_long in get_random_bytes()
  x86: Call stop_machine_text_poke() on all CPUs
  x86, ioapic: Only print ioapic debug information for IRQs belonging to an ioapic chip
  x86/mrst: Avoid reporting wrong nmi status
  x86/mrst: Add support for Penwell clock calibration
  x86/apic: Allow use of lapic timer early calibration result
  x86/apic: Do not clear nr_irqs_gsi if no legacy irqs
  x86/platform: Add a wallclock_init func to x86_platforms ops
  x86/mce: Make mce_chrdev_ops 'static const'

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
  cy82c693: fix PCI device selection
  icside: DMA support fix
  IDE: Don't powerdown Compaq Triflex IDE device on suspend
  piix: ICH7 MWDMA1 errata

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Patch sun4v code sequences properly on module load.
  sparc: Kill custom io_remap_pfn_range().
  sparc: Stash orig_i0 into %g6 instead of %g2
  sparc: Fix handling of orig_i0 wrt. debugging when restarting syscalls.
  sparc: sigutil: Include <linux/errno.h>

As is probably painfully obvious, I don't have time to be a cgroups
maintainer.  Rather than have me continue to hope that I'll magically
find more spare time, instead Tejun has kindly agreed to take over the
role, along with Li Zefan.

-tj: added cgroup tree URL to MAINTAINERS file
Signed-off-by: Paul Menage <paul@paulmenage.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <1321320612-57855-1-git-send-email-paul@paulmenage.org>

Commit 2aede851
(PM / Hibernate: Freeze kernel threads after preallocating memory)
postponed the freezing of kernel threads to after preallocating memory
for hibernation. But while doing that, the hibernation test TEST_FREEZER
and the test mode HIBERNATION_TESTPROC were not moved accordingly.

As a result, when using these test modes, it only goes upto the freezing of
userspace and exits, when in fact it should go till the complete end of task
freezing stage, namely the freezing of kernel threads as well.

So, move these points of exit to appropriate places so that freezing of
kernel threads is also tested while using these test harnesses.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

commit f39925db (ipv4: Cache learned redirect information in
inetpeer.) introduced a regression in ICMP redirect handling.

It assumed ipv4_dst_check() would be called because all possible routes
were attached to the inetpeer we modify in ip_rt_redirect(), but thats
not true.

commit 7cc9150e (route: fix ICMP redirect validation) tried to fix
this but solution was not complete. (It fixed only one route)

So we must lookup existing routes (including different TOS values) and
call check_peer_redir() on them.
Reported-by: Ivan Zahariev <famzah@icdsoft.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

I will no longer be maintaining XFS for SGI.  Ben Myers
(bpm@sgi.com) has agreed to be the primary maintainer
for XFS in my place.  I will continue to be able to push
commits to the SGI XFS tree if required.  As such I will
continue to be a designated XFS maintainer, but plan to
serve in more of a backup role.
Signed-off-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

ping module incorrectly increments ICMP_MIB_INERRORS if feeded with a
frame not belonging to its own sockets.

RFC 2011 states that ICMP_MIB_INERRORS should count "the number of ICMP
messages which the entiry received but determined as having
ICMP-specific errors (bad ICMP checksums, bad length, etc.)."
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Flavio Leitner <fbl@redhat.com>
Acked-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

* 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen-gntalloc: signedness bug in add_grefs()
  xen-gntalloc: integer overflow in gntalloc_ioctl_alloc()
  xen-gntdev: integer overflow in gntdev_alloc_map()
  xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.
  xen/balloon: Avoid OOM when requesting highmem
  xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI
  xen: map foreign pages for shared rings by updating the PTEs directly

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: add missed trace_block_plug
  paride: fix potential information leak in pg_read()
  bio: change some signed vars to unsigned
  block: avoid unnecessary plug list flush
  cciss: auto engage SCSI mid layer at driver load time
  loop: cleanup set_status interface
  include/linux/bio.h: use a static inline function for bio_integrity_clone()
  loop: prevent information leak after failed read
  block: Always check length of all iov entries in blk_rq_map_user_iov()
  The Windows driver .inf disables ASPM on all cciss devices. Do the same.
  backing-dev: ensure wakeup_timer is deleted
  block: Revert "[SCSI] genhd: add a new attribute "alias" in gendisk"

* 'unicore32' of git://github.com/gxt/linux:
  unicore32, exec: remove redundant set_fs(USER_DS)
  unicore32: Fix typo 'PUV3_I2C'
  unicore32: drop unused Kconfig symbols
  rtc: rtc-puv3: Add __devinit and __devexit markers for probe and remove
  arch/unicore32: do not use EXTRA_AFLAGS or EXTRA_CFLAGS
  unicore32: fix build error for find bitops

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/signal32: Fix sigset_t conversion when copying to user
  powerpc: Fix atomic_xxx_return barrier semantics
  powerpc: Remove buggy 9-year-old test for binutils < 2.12.1
  powerpc/book3e-64: Fix debug support for userspace
  powerpc: Remove extraneous CONFIG_PPC_ADV_DEBUG_REGS define
  powerpc: Revert show_regs() define for readability
  powerpc/ps3: Fix SMP lockdep boot warning
  powerpc/ps3: Fix lost SMP IPIs
  powerpc: Add hvcall.h include to book3s_hv.c
  powerpc/trace: Add a dummy stack frame for trace_hardirqs_off
  powerpc: Copy down exception vectors after feature fixups
  powerpc: panic if we can't instantiate RTAS
  powerpc/4xx: Fix typos in kexec config dependencies
  powerpc/fsl: MCU_MPC8349EMITX wants I2C built-in, modular won't do...
  powerpc/fsl_udc_core: Fix dumb typo
  carma-fpga: Missed switch from of_register_platform_driver()
  powerpc: Fix build breakage in jump_label.c

* 'for-linus' of git://git.selinuxproject.org/~jmorris/linux-security:
  encrypted-keys: module build fixes
  encrypted-keys: fix error return code
  Smack: smackfs cipso seq read repair

Some of the sun4v code patching occurs in inline functions visible
to, and usable by, modules.

Therefore we have to patch them up during module load.
Signed-off-by: David S. Miller <davem@davemloft.net>

If IRQ was never initialized, then calling napi_disable() would hang.
Add more bookkeeping to track whether IRQ was ever initialized.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The hardware has a restriction that the minimum ring size possible
is 128. The number of elements used is controlled by tx_pending and
the overall number of elements in the ring tx_ring_size, therefore it
is okay to limit the number of elements in use to a small value (63)
but still provide a bigger ring.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

To handle the large physical addresses, just make a simple wrapper
around remap_pfn_range() like MIPS does.
Signed-off-by: David S. Miller <davem@davemloft.net>

When changing mode via bonding's sysfs, the slaves are not initialized
correctly. Forbid to change modes with slaves present to ensure that every
slave is initialized correctly via bond_enslave().
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Acked-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>