The Rn value from the emulation is unconditionally written back;
this is fine as long as Rn != PC because in that case, even if the
instruction isn't a write back instruction, it will only result in the
same value being written back.

In case Rn == PC, then the emulated instruction doesn't have the
actual PC value in Rn but an adjusted value; when this is written
back, it will result in the PC being incorrectly updated.

An altenative solution would be to check bits 24 and 22 to see whether
the instruction actually is a write back instruction or not. I think
it's enough to check whether Rn != PC,  because:
- it's looks cheaper than the alternative
- to my understaning it's not permitted to update the PC with a write
back instruction, so we don't lose any ability to emulate legal
instructions.
- in case of writing back for non write back instructions where Rn != PC, it doesn't matter because the values are the same.

Regarding the second point above, it would possibly be prudent to add
some checking to prep_emulate_ldr_str(), so that instructions with
both write back and Rn == PC would be rejected.
Signed-off-by: Viktor Rosendahl <viktor.rosendahl@nokia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Remove call to the old GPIO init function.
Fix old MPP control offset value.
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Acked-by: Saeed Bishara <saeed.bishara@gmail.com>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>

If a counter overflows during a perf stat profiling run it may overtake
the last known value of the counter:

    0        prev     new                0xffffffff
    |----------|-------|----------------------|

In this case, the number of events that have occurred is
(0xffffffff - prev) + new. Unfortunately, the event update code will
not realise an overflow has occurred and will instead report the event
delta as (new - prev) which may be considerably smaller than the real
count.

This patch adds an extra argument to armpmu_event_update which indicates
whether or not an overflow has occurred. If an overflow has occurred
then we use the maximum period of the counter to calculate the elapsed
events.
Acked-by: Jamie Iles <jamie@jamieiles.com>
Reported-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARMv7 dictates that the interrupt-enable and count-enable registers for
each PMU counter are UNKNOWN following core reset.

This patch adds a new (optional) function pointer to struct arm_pmu for
resetting the PMU state during init. The reset function is called on
each CPU via an arch_initcall in the generic ARM perf_event code and
allows the PMU backend to write sane values to any UNKNOWN registers.
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

The ARMv7 architecture does not guarantee that effects from co-processor
writes are immediately visible to following instructions.

This patch adds two isbs to the ARMv7 perf code:

(1) Immediately after selecting an event register, so that the PMU state
    following this instruction is consistent with the new event.

(2) Immediately before writing to the PMCR, so that any previous writes
    to the PMU have taken effect before (typically) enabling the
    counters.
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

The second GIC, present when EB board is used with a MPCore tile,
was initialised starting with irq number 64, which made interrupts
64-95 in the primary GIC unusable.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

* 'syscore' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  Introduce ARCH_NO_SYSDEV_OPS config option (v2)
  cpufreq: Use syscore_ops for boot CPU suspend/resume (v2)
  KVM: Use syscore_ops instead of sysdev class and sysdev
  PCI / Intel IOMMU: Use syscore_ops instead of sysdev class and sysdev
  timekeeping: Use syscore_ops instead of sysdev class and sysdev
  x86: Use syscore_ops instead of sysdev classes and sysdevs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA/nes: Fix test of uninitialized netdev

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (55 commits)
  [SCSI] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module
  [SCSI] qla4xxx: Use polling mode for disable interrupt mailbox completion
  [SCSI] Revert "[SCSI] Retrieve the Caching mode page"
  [SCSI] bnx2fc: IO completion not processed due to missed wakeup
  [SCSI] qla4xxx: Update driver version to 5.02.00-k6
  [SCSI] qla4xxx: masking required bits of add_fw_options during initialization
  [SCSI] qla4xxx: added new function qla4xxx_relogin_all_devices
  [SCSI] qla4xxx: add support for ql4xsess_recovery_tmo cmd line param
  [SCSI] qla4xxx: Add support for ql4xmaxqdepth command line parameter
  [SCSI] qla4xxx: cleanup function qla4xxx_process_ddb_changed
  [SCSI] qla4xxx: Prevent other port reinitialization during remove_adapter
  [SCSI] qla4xxx: remove unused ddb flag DF_NO_RELOGIN
  [SCSI] qla4xxx: cleanup DDB relogin logic during initialization
  [SCSI] qla4xxx: Do not retry ISP82XX initialization if H/W state is failed
  [SCSI] qla4xxx: Do not send mbox command if FW is in failed state
  [SCSI] qla4xxx: cleanup qla4xxx_initialize_ddb_list()
  [SCSI] ses: add subenclosure support
  [SCSI] bnx2fc: Bump version to 1.0.1
  [SCSI] bnx2fc: Remove unnecessary module state checks
  [SCSI] bnx2fc: Fix MTU issue by using static MTU
  ...

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kdb: add usage string of 'per_cpu' command
  kgdb,x86_64: fix compile warning found with sparse
  kdb: code cleanup to use macro instead of value
  kgdboc,kgdbts: strlen() doesn't count the terminator

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (56 commits)
  route: Take the right src and dst addresses in ip_route_newports
  ipv4: Fix nexthop caching wrt. scoping.
  ipv4: Invalidate nexthop cache nh_saddr more correctly.
  net: fix pch_gbe section mismatch warning
  ipv4: fix fib metrics
  mlx4_en: Removing HW info from ethtool -i report.
  net_sched: fix THROTTLED/RUNNING race
  drivers/net/a2065.c: Convert release_resource to release_region/release_mem_region
  drivers/net/ariadne.c: Convert release_resource to release_region/release_mem_region
  bonding: fix rx_handler locking
  myri10ge: fix rmmod crash
  mlx4_en: updated driver version to 1.5.4.1
  mlx4_en: Using blue flame support
  mlx4_core: reserve UARs for userspace consumers
  mlx4_core: maintain available field in bitmap allocator
  mlx4: Add blue flame support for kernel consumers
  mlx4_en: Enabling new steering
  mlx4: Add support for promiscuous mode in the new steering model.
  mlx4: generalization of multicast steering.
  mlx4_en: Reporting HW revision in ethtool -i
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: Disable ASPM when _OSC control is not granted for PCIe services
  PCI: Changing ASPM policy, via /sys, to POWERSAVE could cause NMIs
  PCI: PCIe links may not get configured for ASPM under POWERSAVE mode
  PCI/ACPI: Report ASPM support to BIOS if not disabled from command line

* git://git.infradead.org/battery-2.6: (30 commits)
  bq20z75: Fix time and temp units
  bq20z75: Fix issues with present and suspend
  z2_battery: Fix count of properties
  s3c_adc_battery: Fix method names when PM not set
  z2_battery: Add MODULE_DEVICE_TABLE
  ds2782_battery: Add MODULE_DEVICE_TABLE
  bq20z75: Add MODULE_DEVICE_TABLE
  power_supply: Update power_supply_is_watt_property
  bq20z75: Add i2c retry mechanism
  bq20z75: Add optional battery detect gpio
  twl4030_charger: Make the driver atomic notifier safe
  bq27x00: Use single i2c_transfer call for property read
  bq27x00: Cleanup bq27x00_i2c_read
  bq27x00: Minor cleanups
  bq27x00: Give more specific reports on battery status
  bq27x00: Add MODULE_DEVICE_TABLE
  bq27x00: Add new properties
  bq27x00: Poll battery state
  bq27x00: Cache battery registers
  bq27x00: Add bq27000 support
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm:
  dm stripe: implement merge method
  dm mpath: allow table load with no priority groups
  dm mpath: fail message ioctl if specified path is not valid
  dm ioctl: add flag to wipe buffers for secure data
  dm ioctl: prepare for crypt key wiping
  dm crypt: wipe keys string immediately after key is set
  dm: add flakey target
  dm: fix opening log and cow devices for read only tables

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: tsc2005 - fix locking issue
  Input: tsc2005 - use relative jiffies to schedule the watchdog
  Input: tsc2005 - driver should depend on GENERIC_HARDIRQS

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

* 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (23 commits)
  genirq: Expand generic show_interrupts()
  gpio: Fold irq_set_chip/irq_set_handler to irq_set_chip_and_handler
  gpio: Cleanup genirq namespace
  arm: ep93xx: Add basic interrupt info
  arm/gpio: Remove three copies of broken and racy debug code
  xtensa: Use generic show_interrupts()
  xtensa: Convert genirq namespace
  xtensa: Use generic IRQ Kconfig and set GENERIC_HARDIRQS_NO_DEPRECATED
  xtensa: Convert s6000 gpio irq_chip to new functions
  xtensa: Convert main irq_chip to new functions
  um: Use generic show_interrupts()
  um: Convert genirq namespace
  m32r: Use generic show_interrupts()
  m32r: Convert genirq namespace
  h8300: Use generic show_interrupts()
  h8300: Convert genirq namespace
  avr32: Cleanup eic_set_irq_type()
  avr32: Use generic show_interrupts()
  avr: Cleanup genirq namespace
  avr32: Use generic IRQ config, enable GENERIC_HARDIRQS_NO_DEPRECATED
  ...

Fix up trivial conflict in drivers/gpio/timbgpio.c

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, doc: Update sched-design-CFS.txt
  sched: Remove unused 'rq' variable and cpu_rq() call from alloc_fair_sched_group()
  sched.h: Fix a typo ("its")
  sched: Fix yield_to kernel-doc

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: Complain louder about BIOSen corrupting CPU/PMU state and continue
  perf, x86: P4 PMU - Read proper MSR register to catch unflagged overflows
  perf symbols: Look at .dynsym again if .symtab not found
  perf build-id: Add quirk to deal with perf.data file format breakage
  perf session: Pass evsel in event_ops->sample()
  perf: Better fit max unprivileged mlock pages for tools needs
  perf_events: Fix stale ->cgrp pointer in update_cgrp_time_from_cpuctx()
  perf top: Fix uninitialized 'counter' variable
  tracing: Fix set_ftrace_filter probe function display
  perf, x86: Fix Intel fixed counters base initialization

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

* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  genirq: Provide locked setter for chip, handler, name
  genirq: Provide a lockdep helper
  genirq; Remove the last leftovers of the old sparse irq code

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

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  futex: Fix WARN_ON() test for UP
  WARN_ON_SMP(): Allow use in if() statements on UP
  x86, dumpstack: Use %pB format specifier for stack trace
  vsprintf: Introduce %pB format specifier
  lockdep: Remove unused 'factor' variable from lockdep_stats_show()

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: DT: Cleanup namespace and call irq_set_irq_type() unconditional
  x86: DT: Fix return condition in irq_create_of_mapping()
  x86, mpparse: Move check_slot into CONFIG_X86_IO_APIC context

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: merge m68k and m68knommu arch directories

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc32: Fix multiple RTC detections on SUN4D

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] cmpxchg: implement cmpxchg64()
  [S390] xchg/cmpxchg: move to own header file
  [S390] ccwgroup_driver: remove duplicate members
  [S390] ccw_bus_type: make it static
  [S390] ccw_driver: remove duplicate members
  [S390] qdio: prevent handling of buffers if count is zero
  [S390] setup: register bss section as resource
  [S390] setup: simplify setup_resources()
  [S390] wire up sys_syncfs
  [S390] wire up sys_clock_adjtime
  [S390] wire up sys_open_by_handle_at
  [S390] wire up sys_name_to_handle_at
  [S390] oprofile: disable hw sampling for CONFIG_32BIT
  [S390] early: limit savesys cmd string handling
  [S390] early: Fix possible overlapping data buffer

* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (49 commits)
  MIPS: JZ4740: Set nand ecc offsets for the qi_lb60 board
  MIPS: JZ4740: qi_lb60: Add gpio-charger device
  MIPS: Wire up syncfs(2).
  MIPS: Hook up name_to_handle_at, open_by_handle_at and clock_adjtime syscalls.
  MIPS: VR41xx: Convert to new irq_chip functions
  MIPS: TXx9: Convert to new irq_chip functions
  MIPS: SNI: Convert to new irq_chip functions
  MIPS: Sibyte: Convert to new irq_chip functions
  MIPS: IP32: Convert to new irq_chip functions
  MIPS: IP27: Convert to new irq_chip functions
  MIPS: IP22/IP28: Convert to new irq_chip functions
  MIPS: RB532: Convert to new irq_chip functions
  MIPS: PowerTV: Convert to new irq_chip functions
  MIPS: PNX8550: Convert to new irq_chip functions
  MIPS: PNX83xx: Convert to new irq_chip functions
  MIPS: msp71xx: Convert to new irq_chip functions
  MIPS: Loongson: Convert to new irq_chip functions
  MIPS: Use generic show_interrupts()
  MIPS: SMTC: Cleanup the hook mess and use irq_data
  MIPS: SMTC: Use irq_data in smtc_forward_irq()
  ...

commit b515498f ("userns: add a user namespace owner of ipc ns") added a
user namespace owner of ipc ns, but it also introduced a use after free in
free_ipc_ns().
Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Acked-by: "Serge E. Hallyn" <serge.hallyn@canonical.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 0bc825d2 ("codafs: fix compile warning when CONFIG_SYSCTL=n")
introduces build breakage, when CONFIG_PROC_SYSCTL=n and
CONFIG_CODA_FS=y:

  fs/built-in.o: In function `init_coda':
  psdev.c:(.init.text+0xc02): undefined reference to `coda_sysctl_init'
  psdev.c:(.init.text+0xc7c): undefined reference to `coda_sysctl_clean'
  fs/built-in.o: In function `exit_coda':
  psdev.c:(.exit.text+0xa9): undefined reference to `coda_sysctl_clean'
  make: *** [.tmp_vmlinux1] Error 1
Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Reported-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Acked-by: Alex Dubov <oakad@yahoo.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

Fix sparse warning:

arch/x86/kernel/kgdb.c:123:9: warning: switch with no cases
Reported-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

It's better to use macro KDB_BASE_CMD_MAX instead of 50
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

This is an off by one because strlen() doesn't count the null
terminator.  We strcpy() these strings into an array of size
MAX_CONFIG_LEN.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

The jz4740 nand driver now requires that the ecc offsets are set.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2058/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Register the gpio-charger device which reports whether device is currently
charging or not.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2059/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

These system calls we recently added.

32-bit ABIs need compat handling for sys_clock_adjtime().

o32 also needs compat handling for sys_open_by_handle_at();
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2165/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

And cleanup direct access to irq_desc[].
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2208/
Patchwork: https://patchwork.linux-mips.org/patch/2209/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2207/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>