Pull x86 fixes from Peter Anvin:
 "This series fixes a couple of build failures, and fixes MTRR cleanup
  and memory setup on very specific memory maps.

  Finally, it fixes triggering backtraces on all CPUs, which was
  inadvertently disabled on x86."

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Fix dummy variable buffer allocation
  x86: Fix trigger_all_cpu_backtrace() implementation
  x86: Fix section mismatch on load_ucode_ap
  x86: fix build error and kconfig for ia32_emulation and binfmt
  range: Do not add new blank slot with add_range_with_merge
  x86, mtrr: Fix original mtrr range get for mtrr_cleanup

Pull drm radeon fixes from Dave Airlie:
 "One core fix, but mostly radeon fixes for s/r and big endian UVD
  support, and a fix to stop the GPU being reset for no good reason, and
  crashing people's machines."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon: update lockup tracking when scheduling in empty ring
  drm/prime: Honor requested file flags when exporting a buffer
  drm/radeon: fix UVD on big endian
  drm/radeon: fix write back suspend regression with uvd v2
  drm/radeon: do not try to uselessly update virtual memory pagetable

Pull ACPI fixes from Rafael Wysocki:

 - Fix for a regression causing a failure to turn on some devices on
   some systems during initialization introduced by a recent revert of
   an ACPI PM change that broke something else.  Fortunately, we know
   exactly what devices are affected, so we can add a fix just for them
   leaving everyone else alone.

 - ACPI power resources initialization fix preventing a NULL pointer
   from being dereferenced in the acpi_add_power_resource() error code
   path.

 - ACPI dock station driver fix that adds missing locking to
   write_undock().

 - ACPI resources allocation fix changing the scope of an old workaround
   so that it doesn't affect systems that aren't actually buggy.  This
   was reported a couple of days ago to fix DMA problems on some new
   platforms so we need it in -stable.  From Mika Westerberg.

* tag 'acpi-3.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / LPSS: Power up LPSS devices during enumeration
  ACPI / PM: Fix error code path for power resources initialization
  ACPI / dock: Take ACPI scan lock in write_undock()
  ACPI / resources: call acpi_get_override_irq() only for legacy IRQ resources

Pull KVM fixes from Paolo Bonzini:
 "Three one-line fixes for my first pull request; one for x86 host, one
  for x86 guest, one for PPC"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  x86: kvmclock: zero initialize pvclock shared memory area
  kvm/ppc/booke: Delay kvmppc_lazy_ee_enable
  KVM: x86: remove vcpu's CPL check in host-invoked XCR set

Pull crypto fix from Herbert Xu:
 "This fixes an unaligned crash in XTS mode when using aseni_intel"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: aesni_intel - fix accessing of unaligned memory

Pull Ceph fix from Sage Weil:
 "This fixes a problem preventing the kernel and userland librbd
  libraries from sharing data with the new format 2 images"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: use the correct length for format 2 object names

 * Don't leak random kernel memory to EFI variable NVRAM when attempting
   to initiate garbage collection. Also, free the kernel memory when
   we're done with it instead of leaking - Ben Hutchings
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1. Check for allocation failure
2. Clear the buffer contents, as they may actually be written to flash
3. Don't leak the buffer

Compile-tested only.

[ Tested successfully on my buggy ASUS machine - Matt ]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

One user visible fix to stop misreport GPU hangs and subsequent resets.
* 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: update lockup tracking when scheduling in empty ring

There might be issue with lockup detection when scheduling on an
empty ring that have been sitting idle for a while. Thus update
the lockup tracking data when scheduling new work in an empty ring.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Pull scheduler fixes from Ingo Molnar:
 "Two smaller fixes - plus a context tracking tracing fix that is a bit
  bigger"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tracing/context-tracking: Add preempt_schedule_context() for tracing
  sched: Fix clear NOHZ_BALANCE_KICK
  sched/x86: Construct all sibling maps if smt

Pull perf fixes from Ingo Molnar:
 "Four fixes.  The mmap ones are unfortunately larger than desired -
  fuzzing uncovered bugs that needed perf context life time management
  changes to fix properly"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix broken PEBS-LL support on SNB-EP/IVB-EP
  perf: Fix mmap() accounting hole
  perf: Fix perf mmap bugs
  kprobes: Fix to free gone and unused optprobes

Pull cpu idle fixes from Thomas Gleixner:
 - Add a missing irq enable. Fallout of the idle conversion
 - Fix stackprotector wreckage caused by the idle conversion

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  idle: Enable interrupts in the weak arch_cpu_idle() implementation
  idle: Add the stack canary init to cpu_startup_entry()

Pull timer fixes from Thomas Gleixner:
 - Fix inconstinant clock usage in virtual time accounting
 - Fix a build error in KVM caused by the NOHZ work
 - Remove a pointless timekeeping duty assignment which breaks NOHZ
 - Use a proper notifier return value to avoid random behaviour

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick: Remove useless timekeeping duty attribution to broadcast source
  nohz: Fix notifier return val that enforce timekeeping
  kvm: Move guest entry/exit APIs to context_tracking
  vtime: Use consistent clocks among nohz accounting

Pull powerpc fix fro, Benjamin Herrenschmidt:
 "We accidentally broke hugetlbfs on Freescale embedded processors which
  use a slightly different page table layout than our server processors"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix bad pmd error with book3E config

Pull tilepro fix from Chris Metcalf:
 "This change allows the older tilepro architecture to be correctly
  built by newer gccs, despite a change that caused gcc to start trying
  to use an out-of-line implementation for __builtin_ffsll().

  This should be inline again starting with gcc 4.7.4 and 4.8.2 or so,
  but meanwhile this change keeps things from breaking, with the only
  cost being a few bytes of code in the kernel to provide __ffsdi2 even
  for compilers that do inline it"

* 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tilepro: work around module link error with gcc 4.7

Pull arm64 perf fix from Catalin Marinas:
 "Perf fix (user-mode PC recording)"

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  perf: arm64: Record the user-mode PC in the call chain.

The following change fixes the x86 implementation of
trigger_all_cpu_backtrace(), which was previously (accidentally,
as far as I can tell) disabled to always return false as on
architectures that do not implement this function.

trigger_all_cpu_backtrace(), as defined in include/linux/nmi.h,
should call arch_trigger_all_cpu_backtrace() if available, or
return false if the underlying arch doesn't implement this
function.

x86 did provide a suitable arch_trigger_all_cpu_backtrace()
implementation, but it wasn't actually being used because it was
declared in asm/nmi.h, which linux/nmi.h doesn't include. Also,
linux/nmi.h couldn't easily be fixed by including asm/nmi.h,
because that file is not available on all architectures.

I am proposing to fix this by moving the x86 definition of
arch_trigger_all_cpu_backtrace() to asm/irq.h.

Tested via: echo l > /proc/sysrq-trigger

Before the change, this uses a fallback implementation which
shows backtraces on active CPUs (using
smp_call_function_interrupt() )

After the change, this shows NMI backtraces on all CPUs
Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1370518875-1346-1-git-send-email-walken@google.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

With this change, we no longer lose the innermost entry in the user-mode
part of the call chain.  See also the x86 port, which includes the ip,
and the corresponding change in arch/arm.
Signed-off-by: Jed Davis <jld@mozilla.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Book3E uses the hugepd at PMD level and don't encode pte directly
at the pmd level. So it will find the lower bits of pmd set
and the pmd_bad check throws error. Infact the current code
will never take the free_hugepd_range call at all because it will
clear the pmd if it find a hugepd pointer. Fix this by clearing
bad pmd only if it is not a hugepd pointer.

This is regression introduced by e2b3d202
"powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format"
Reported-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Commit 7cd8407d (ACPI / PM: Do not execute _PS0 for devices without
_PSC during initialization) introduced a regression on some systems
with Intel Lynxpoint Low-Power Subsystem (LPSS) where some devices
need to be powered up during initialization, but their device objects
in the ACPI namespace have _PS0 and _PS3 only (without _PSC or power
resources).

To work around this problem, make the ACPI LPSS driver power up
devices it knows about by using a new helper function
acpi_device_fix_up_power() that does all of the necessary
sanity checks and calls acpi_dev_pm_explicit_set() to put the
device into D0.
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Commit 781d737c (ACPI: Drop power resources driver) introduced a
bug in the power resources initialization error code path causing
a NULL pointer to be referenced in acpi_release_power_resource()
if there's an error triggering a jump to the 'err' label in
acpi_add_power_resource().  This happens because the list_node
field of struct acpi_power_resource has not been initialized yet
at this point and doing a list_del() on it is a bad idea.

To prevent this problem from occuring, initialize the list_node
field of struct acpi_power_resource upfront.
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 3.9+ <stable@vger.kernel.org>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>

Since commit 3757b948 (ACPI / hotplug: Fix concurrency issues and
memory leaks) acpi_bus_scan() and acpi_bus_trim() must always be
called under acpi_scan_lock, but currently the following scenario
violating that requirement is possible:

 write_undock()
  handle_eject_request()
   hotplug_dock_devices()
    dock_remove_acpi_device()
     acpi_bus_trim()

Fix that by making write_undock() acquire acpi_scan_lock before
calling handle_eject_request() as appropriate (begin_undock() is
under the lock too in analogy with acpi_dock_deferred_cb()).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 3.9+ <stable@vger.kernel.org>
Acked-by: Toshi Kani <toshi.kani@hp.com>

acpi_get_override_irq() was added because there was a problem with
buggy BIOSes passing wrong IRQ() resource for the RTC IRQ.  The
commit that added the workaround was 61fd47e0 (ACPI: fix two
IRQ8 issues in IOAPIC mode).

With ACPI 5 enumerated devices there are typically one or more
extended IRQ resources per device (and these IRQs can be shared).
However, the acpi_get_override_irq() workaround forces all IRQs in
range 0 - 15 (the legacy ISA IRQs) to be edge triggered, active high
as can be seen from the dmesg below:

	ACPI: IRQ 6 override to edge, high
	ACPI: IRQ 7 override to edge, high
	ACPI: IRQ 7 override to edge, high
	ACPI: IRQ 13 override to edge, high

Also /proc/interrupts for the I2C controllers (INT33C2 and INT33C3) shows
the same thing:

	7:          4          0          0          0   IO-APIC-edge INT33C2:00, INT33C3:00

The _CSR method for INT33C2 (and INT33C3) device returns following
resource:

	Interrupt (ResourceConsumer, Level, ActiveLow, Shared,,, )
	{
		0x00000007,
	}

which states that this is supposed to be level triggered, active low,
shared IRQ instead.

Fix this by making sure that acpi_get_override_irq() gets only called
when we are dealing with legacy IRQ() or IRQNoFlags() descriptors.

While we are there, correct pr_warning() to print the right triggering
value.

This change turns out to be necessary to make DMA work correctly on
systems based on the Intel Lynxpoint PCH (Platform Controller Hub).

[rjw: Changelog]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: 3.9+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

We are in the process of removing all the __cpuinit annotations.
While working on making that change, an existing problem was
made evident:

  WARNING: arch/x86/kernel/built-in.o(.text+0x198f2): Section mismatch
  in reference from the function cpu_init() to the function
  .init.text:load_ucode_ap()   The function cpu_init() references
  the function __init load_ucode_ap().  This is often because cpu_init
  lacks a __init annotation or the annotation of load_ucode_ap is wrong.

This now appears because in my working tree, cpu_init() is no longer
tagged as __cpuinit, and so the audit picks up the mismatch.  The 2nd
hypothesis from the audit is the correct one, as there was an incorrect
__init tag on the prototype in the header (but __cpuinit was used on
the function itself.)

The audit is telling us that the prototype's __init annotation took
effect and the function did land in the .init.text section.  Checking
with objdump on a mainline tree that still has __cpuinit shows that
the __cpuinit on the function takes precedence over the __init on the
prototype, but that won't be true once we make __cpuinit a no-op.

Even though we are removing __cpuinit, we temporarily align both
the function and the prototype on __cpuinit so that the changeset
can be applied to stable trees  if desired.

[ hpa: build fix only, no object code change ]

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: stable <stable@vger.kernel.org> # 3.9+
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Link: http://lkml.kernel.org/r/1371654926-11729-1-git-send-email-paul.gortmaker@windriver.comSigned-off-by: H. Peter Anvin <hpa@linux.intel.com>

We need to pick up the definition of raw_smp_processor_id() from
asm/smp.h.  For the !SMP case, we need to supply a definition of
raw_smp_processor_id().

Because of the include dependencies we cannot use smp_call_func_t in
asm/smp.h, but we do need linux/thread_info.h
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull sparc fixes from David Miller:
 "Various sparc bug fixes, in particular:

  1) TSB hashes have to be flushed before TLB on sparc64, from Dave
     Kleikamp.

  2) LEON timer interrupts can get stuck, from Andreas Larsson.

  3) Sparc64 needs to handle lack of address-congruence devicetree
     property, from Bob Picco"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: tsb must be flushed before tlb
  sparc,leon: Convert to use devm_ioremap_resource
  sparc64 address-congruence property
  sparc32, leon: Enable interrupts before going idle to avoid getting stuck
  sparc32, leon: Remove separate "ticker" timer for SMP
  sparc: kernel: using strlcpy() instead of strcpy()
  arch: sparc: prom: looping issue, need additional length check in the outside looping
  sparc: remove inline marking of EXPORT_SYMBOL functions
  sparc: Switch to asm-generic/linkage.h

Pull parisc fixes from Helge Deller:
 "This contains a kernel segfault fix when reading /proc/kpageflags or
  /proc/kpagecount, two fixes for the serial port and PCI graphic card
  support on C8000 workstations and a fix to use unshadowed registers
  for flushing D- and I-caches."

* 'parisc-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Use unshadowed index register for flush instructions in flush_dcache_page_asm and flush_icache_page_asm
  parisc: provide pci_mmap_page_range() for parisc
  parisc: fix serial ports on C8000 workstation
  parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50 (part 2)

Commit 106c992a ("mm/hugetlb: add more arch-defined huge_pte
functions") added an include of <asm-generic/hugetlb.h> to each
architecture's <asm/hugetlb.h> (except s390).  Unfortunately metag was
missed which resulted in build errors when hugetlbfs is enabled (see
below).

Add the include for metag too to fix the build errors:

  mm/hugetlb.c In function 'make_huge_pte':
  mm/hugetlb.c +2250 : error: implicit declaration of function 'huge_pte_mkwrite'
  mm/hugetlb.c +2250 : error: implicit declaration of function 'huge_pte_mkdirty'
  ...
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull ARM fixes from Russell King:
 "The larger changes this time are

   - "ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page"
     which fixes more data corruption problems with O_DIRECT

   - "ARM: 7759/1: decouple CPU offlining from reboot/shutdown" which
     gets us back to working shutdown/reboot on SMP platforms

   - "ARM: 7752/1: errata: LoUIS bit field in CLIDR register is incorrect"
     which fixes a shutdown regression found in v3.10 on Versatile
     Express platforms.

  The remainder are the quite small, maybe one or two line changes"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7759/1: decouple CPU offlining from reboot/shutdown
  ARM: 7756/1: zImage/virt: remove hyp-stub.S during distclean
  ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page
  ARM: 7754/1: Fix the CPU ID and the mask associated to the PJ4B
  ARM: 7753/1: map_init_section flushes incorrect pmd
  ARM: 7752/1: errata: LoUIS bit field in CLIDR register is incorrect

Dave Jones hit the following bug report:

 ===============================
 [ INFO: suspicious RCU usage. ]
 3.10.0-rc2+ #1 Not tainted
 -------------------------------
 include/linux/rcupdate.h:771 rcu_read_lock() used illegally while idle!
 other info that might help us debug this:
 RCU used illegally from idle CPU! rcu_scheduler_active = 1, debug_locks = 0
 RCU used illegally from extended quiescent state!
 2 locks held by cc1/63645:
  #0:  (&rq->lock){-.-.-.}, at: [<ffffffff816b39fd>] __schedule+0xed/0x9b0
  #1:  (rcu_read_lock){.+.+..}, at: [<ffffffff8109d645>] cpuacct_charge+0x5/0x1f0

 CPU: 1 PID: 63645 Comm: cc1 Not tainted 3.10.0-rc2+ #1 [loadavg: 40.57 27.55 13.39 25/277 64369]
 Hardware name: Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H, BIOS F12a 04/23/2010
  0000000000000000 ffff88010f78fcf8 ffffffff816ae383 ffff88010f78fd28
  ffffffff810b698d ffff88011c092548 000000000023d073 ffff88011c092500
  0000000000000001 ffff88010f78fd60 ffffffff8109d7c5 ffffffff8109d645
 Call Trace:
  [<ffffffff816ae383>] dump_stack+0x19/0x1b
  [<ffffffff810b698d>] lockdep_rcu_suspicious+0xfd/0x130
  [<ffffffff8109d7c5>] cpuacct_charge+0x185/0x1f0
  [<ffffffff8109d645>] ? cpuacct_charge+0x5/0x1f0
  [<ffffffff8108dffc>] update_curr+0xec/0x240
  [<ffffffff8108f528>] put_prev_task_fair+0x228/0x480
  [<ffffffff816b3a71>] __schedule+0x161/0x9b0
  [<ffffffff816b4721>] preempt_schedule+0x51/0x80
  [<ffffffff816b4800>] ? __cond_resched_softirq+0x60/0x60
  [<ffffffff816b6824>] ? retint_careful+0x12/0x2e
  [<ffffffff810ff3cc>] ftrace_ops_control_func+0x1dc/0x210
  [<ffffffff816be280>] ftrace_call+0x5/0x2f
  [<ffffffff816b681d>] ? retint_careful+0xb/0x2e
  [<ffffffff816b4805>] ? schedule_user+0x5/0x70
  [<ffffffff816b4805>] ? schedule_user+0x5/0x70
  [<ffffffff816b6824>] ? retint_careful+0x12/0x2e
 ------------[ cut here ]------------

What happened was that the function tracer traced the schedule_user() code
that tells RCU that the system is coming back from userspace, and to
add the CPU back to the RCU monitoring.

Because the function tracer does a preempt_disable/enable_notrace() calls
the preempt_enable_notrace() checks the NEED_RESCHED flag. If it is set,
then preempt_schedule() is called. But this is called before the user_exit()
function can inform the kernel that the CPU is no longer in user mode and
needs to be accounted for by RCU.

The fix is to create a new preempt_schedule_context() that checks if
the kernel is still in user mode and if so to switch it to kernel mode
before calling schedule. It also switches back to user mode coming back
from schedule in need be.

The only user of this currently is the preempt_enable_notrace(), which is
only used by the tracing subsystem.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1369423420.6828.226.camel@gandalf.local.homeSigned-off-by: Ingo Molnar <mingo@kernel.org>

I have faced a sequence where the Idle Load Balance was sometime not
triggered for a while on my platform, in the following scenario:

 CPU 0 and CPU 1 are running tasks and CPU 2 is idle

 CPU 1 kicks the Idle Load Balance
 CPU 1 selects CPU 2 as the new Idle Load Balancer
 CPU 2 sets NOHZ_BALANCE_KICK for CPU 2
 CPU 2 sends a reschedule IPI to CPU 2

 While CPU 3 wakes up, CPU 0 or CPU 1 migrates a waking up task A on CPU 2

 CPU 2 finally wakes up, runs task A and discards the Idle Load Balance
       task A quickly goes back to sleep (before a tick occurs on CPU 2)
 CPU 2 goes back to idle with NOHZ_BALANCE_KICK set

Whenever CPU 2 will be selected as the ILB, no reschedule IPI will be sent
because NOHZ_BALANCE_KICK is already set and no Idle Load Balance will be
performed.

We must wait for the sched softirq to be raised on CPU 2 thanks to another
part the kernel to come back to clear NOHZ_BALANCE_KICK.

The proposed solution clears NOHZ_BALANCE_KICK in schedule_ipi if
we can't raise the sched_softirq for the Idle Load Balance.

Change since V1:

- move the clear of NOHZ_BALANCE_KICK in got_nohz_idle_kick if the ILB
  can't run on this CPU (as suggested by Peter)
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1370419991-13870-1-git-send-email-vincent.guittot@linaro.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>

This patch fixes broken support of PEBS-LL on SNB-EP/IVB-EP.
For some reason, the LDLAT extra reg definition for snb_ep
showed up as duplicate in the snb table.

This patch moves the definition of LDLAT back into the
snb_ep table.

Thanks to Don Zickus for tracking this one down.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130607212210.GA11849@quadSigned-off-by: Ingo Molnar <mingo@kernel.org>

Vince's fuzzer once again found holes. This time it spotted a leak in
the locked page accounting.

When an event had redirected output and its close() was the last
reference to the buffer we didn't have a vm context to undo accounting.

Change the code to destroy the buffer on the last munmap() and detach
all redirected events at that time. This provides us the right context
to undo the vm accounting.
Reported-and-tested-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130604084421.GI8923@twins.programming.kicks-ass.net
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel might hung in pvclock_clocksource_read() due to
uninitialized memory might contain odd version value in
following cycle:

        do {
                version = __pvclock_read_cycles(src, &ret, &flags);
        } while ((src->version & 1) || version != src->version);

if secondary kvmclock is accessed before it's registered with kvm.

Clear garbage in pvclock shared memory area right after it's
allocated to avoid this issue.

Ref: https://bugzilla.kernel.org/show_bug.cgi?id=59521Signed-off-by: Igor Mammedov <imammedo@redhat.com>
[See BZ for analysis.  We may want a different fix for 3.11, but
 this is the safest for now - Paolo]
Cc: <stable@vger.kernel.org> # 3.8
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

kwmppc_lazy_ee_enable() should be called as late as possible,
or else we get things like WARN_ON(preemptible()) in enable_kernel_fp()
in configurations where preemptible() works.

Note that book3s_pr already waits until just before __kvmppc_vcpu_run
to call kvmppc_lazy_ee_enable().
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

This fixes a race where a cpu may re-load a tlb from a stale tsb right
after it has been flushed by a remote function call.

I still see some instability when stressing the system with parallel
kernel builds while creating memory pressure by writing to
/proc/sys/vm/nr_hugepages, but this patch improves the stability
significantly.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 75096579 ("lib: devres: Introduce devm_ioremap_resource()")
introduced devm_ioremap_resource() and deprecated the use of
devm_request_and_ioremap().

While at it, also remove the error message as devm_ioremap_resource()
also prints similar error message.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
CC: sparclinux@vger.kernel.org
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

The Machine Description (MD) property "address-congruence-offset" is
optional. According to the MD specification the value is assumed 0UL when
not present. This caused early boot failure on T5.
Signed-off-by: Bob Picco <bob.picco@oracle.com>
CC: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

This enables interrupts for Leon before having the CPU enter power-down mode.

Commit 87fa05ae, "sparc: Use generic idle loop",
gets the CPU stuck on idle for Leon systems. On Leon, disabling interrupts and
powering down the processor will get the processor stuck waiting for an
interrupt that will never be reacted to.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>