Combine the 32-bit syscall tables into one file.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1425439896-8322-3-git-send-email-brgerst@gmail.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

compat_ni_syscall() does the same thing as sys_ni_syscall().
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1425439896-8322-2-git-send-email-brgerst@gmail.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

Before this patch early_trap_init() installs DEBUG_STACK for
X86_TRAP_BP and X86_TRAP_DB. However, DEBUG_STACK doesn't work
correctly until cpu_init() <-- trap_init().

This patch passes 0 to set_intr_gate_ist() and
set_system_intr_gate_ist() instead of DEBUG_STACK to let it use
same stack as kernel, and installs DEBUG_STACK for them in
trap_init().

As core runs at ring 0 between early_trap_init() and
trap_init(), there is no chance to get a bad stack before
trap_init().

As NMI is also enabled in trap_init(), we don't need to care
about is_debug_stack() and related things used in
arch/x86/kernel/nmi.c.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: <dave.hansen@linux.intel.com>
Cc: <lizefan@huawei.com>
Cc: <luto@amacapital.net>
Cc: <oleg@redhat.com>
Link: http://lkml.kernel.org/r/1424929779-13174-1-git-send-email-wangnan0@huawei.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

CLONE_SETTLS is expected to write a TLS entry in the GDT for
32-bit callers and to set FSBASE for 64-bit callers.

The correct check is is_ia32_task(), which returns true in the
context of a 32-bit syscall.  TIF_IA32 is set if the task itself
has a 32-bit personality, which is not the same thing.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Link: http://lkml.kernel.org/r/45e2d0d695393d76406a0c7225b82c76223e0cc5.1424822291.git.luto@amacapital.netSigned-off-by: Ingo Molnar <mingo@kernel.org>

The ability for modified CS and/or SS to be useful has nothing
to do with TIF_IA32.  Similarly, if there's an exploit involving
changing CS or SS, it's exploitable with or without a TIF_IA32
check.

So just delete the check.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Link: http://lkml.kernel.org/r/71c7ab36456855d11ae07edd4945a7dfe80f9915.1424822291.git.luto@amacapital.netSigned-off-by: Ingo Molnar <mingo@kernel.org>

Add support for the new pcommit (persistent commit) instruction.
This instruction was announced in the document "Intel
Architecture Instruction Set Extensions Programming Reference"
with reference number 319433-022:

  https://software.intel.com/sites/default/files/managed/0d/53/319433-022.pdf

The pcommit instruction ensures that data that has been flushed
from the processor's cache hierarchy with clwb, clflushopt or
clflush is accepted to memory and is durable on the DIMM.  The
primary use case for this is persistent memory.

This function shows how to properly use clwb/clflushopt/clflush
and pcommit with appropriate fencing:

void flush_and_commit_buffer(void *vaddr, unsigned int size)
{
	void *vend = vaddr + size - 1;

	for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size)
		clwb(vaddr);

	/* Flush any possible final partial cacheline */
	clwb(vend);

	/*
	 * sfence to order clwb/clflushopt/clflush cache flushes
	 * mfence via mb() also works
	 */
	wmb();

	/* pcommit and the required sfence for ordering */
	pcommit_sfence();
}

After this function completes the data pointed to by vaddr is
has been accepted to memory and will be durable if the vaddr
points to persistent memory.

Pcommit must always be ordered by an mfence or sfence, so to
help simplify things we include both the pcommit and the
required sfence in the alternatives generated by
pcommit_sfence().  The other option is to keep them separated,
but on platforms that don't support pcommit this would then turn
into:

void flush_and_commit_buffer(void *vaddr, unsigned int size)
{
        void *vend = vaddr + size - 1;

        for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size)
                clwb(vaddr);

        /* Flush any possible final partial cacheline */
        clwb(vend);

        /*
         * sfence to order clwb/clflushopt/clflush cache flushes
         * mfence via mb() also works
         */
        wmb();

        nop(); /* from pcommit(), via alternatives */

        /*
         * sfence to order pcommit
         * mfence via mb() also works
         */
        wmb();
}

This is still correct, but now you've got two fences separated
by only a nop.  With the commit and the fence together in
pcommit_sfence() you avoid the final unneeded fence.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1424367448-24254-1-git-send-email-ross.zwisler@linux.intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

There is already defined macro KEEP_SEGMENTS in
<asm/bootparam.h>, let's use it instead of hardcoded
constants.
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1424331298-7456-1-git-send-email-kuleshovmail@gmail.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

Not just setting it when the feature is available is for
consistency, and may allow Xen to drop its custom clearing of
the flag (unless it needs it cleared earlier than this code
executes). Note that the change is benign to ix86, as the flag
starts out clear there.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/54C215D10200007800058912@mail.emea.novell.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Cc: Martin Mares <mj@ucw.cz>
Link: http://lkml.kernel.org/r/1422382588-10367-1-git-send-email-kuleshovmail@gmail.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

x86 instructions cannot exceed 15 bytes, and the instruction
decoder should enforce that.  Prior to 6ba48ff4, the
instruction length limit was implicitly set to 16, which was an
approximation of 15, but there is currently no limit at all.

Fix MAX_INSN_SIZE (it should be 15, not 16), and fix the decoder
to reject instructions that exceed MAX_INSN_SIZE.

Other than potentially confusing some of the decoder sanity
checks, I'm not aware of any actual problems that omitting this
check would cause, nor am I aware of any practical problems
caused by the MAX_INSN_SIZE error.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Fixes: 6ba48ff4 ("x86: Remove arbitrary instruction size limit ...
Link: http://lkml.kernel.org/r/f8f0bc9b8c58cfd6830f7d88400bf1396cbdcd0f.1422403511.git.luto@amacapital.netSigned-off-by: Ingo Molnar <mingo@kernel.org>

In 64-bit mode, AMD and Intel CPUs treat 0x66 prefix before
branch insns differently. For near branches, it affects decode
too since immediate offset's width is different.

See these empirical tests:

  http://marc.info/?l=linux-kernel&m=139714939728946&w=2Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/1423768017-31766-1-git-send-email-dvlasenk@redhat.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

Before this patch, users need to do this to fetch vex.vvvv:

        if (insn->vex_prefix.nbytes == 2) {
                vex_vvvv = ((insn->vex_prefix.bytes[1] >> 3) & 0xf) ^ 0xf;
        }
        if (insn->vex_prefix.nbytes == 3) {
                vex_vvvv = ((insn->vex_prefix.bytes[2] >> 3) & 0xf) ^ 0xf;
        }

Make it so that insn->vex_prefix.bytes[2] always contains
vex.wvvvvLpp bits.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1423767879-31691-1-git-send-email-dvlasenk@redhat.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

Pull x86 RAS update from Ingo Molnar:
 "The changes in this cycle were:

   - allow mmcfg access to APEI error injection handlers

   - improve MCE error messages

   - smaller cleanups"

* 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, mce: Fix sparse errors
  x86, mce: Improve timeout error messages
  ACPI, EINJ: Enhance error injection tolerance level

Pull x86 mm cleanups from Ingo Molnar:
 "Two cleanups: simplify parse_setup_data() and sanitize_e820_map()
  usage"

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, e820: Clean up sanitize_e820_map() users
  x86, setup: Let early_memremap() handle page alignment

Pull x86 SoC updates from Ingo Molnar:
 "Various Intel Atom SoC updates (mostly to enhance debuggability), plus
  an apb_timer cleanup"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: pmc_atom: Expose contents of PSS
  x86: pmc_atom: Clean up init function
  x86: pmc-atom: Remove unused macro
  x86: pmc_atom: don%27t check for NULL twice
  x86: pmc-atom: Assign debugfs node as soon as possible
  x86/platform: Remove unused function from apb_timer.c

Pull x86 fpu updates from Ingo Molnar:
 "Initial round of kernel_fpu_begin/end cleanups from Oleg Nesterov,
  plus a cleanup from Borislav Petkov"

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, fpu: Fix math_state_restore() race with kernel_fpu_begin()
  x86, fpu: Don't abuse has_fpu in __kernel_fpu_begin/end()
  x86, fpu: Introduce per-cpu in_kernel_fpu state
  x86/fpu: Use a symbolic name for asm operand

Pull EFI updates from Ingo Molnar:
 "Main changes:

   - Move efivarfs from the misc filesystem section to pseudo filesystem

   - Expose firmware platform size in sysfs

   - Improve robustness of get_memory_map() by removing assumptions on
     the size of efi_memory_desc_t.

  - various cleanups and fixes

  The biggest risk is the get_memory_map() change, which changes the way
  that both the arm64 and x86 EFI boot stub build the early memory map.
  There are no known regressions with it at the moment, BYMMV"

* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Don't look for chosen@0 node on DT platforms
  firmware: efi: Remove unneeded guid unparse
  efi/libstub: Call get_memory_map() to obtain map and desc sizes
  efi: Small leak on error in runtime map code
  efi: rtc-efi: Mark UIE as unsupported
  arm64/efi: efistub: Apply __init annotation
  efi: Expose underlying UEFI firmware platform size to userland
  efi: Rename efi_guid_unparse to efi_guid_to_str
  efi: Update the URLs for efibootmgr
  fs: Make efivarfs a pseudo filesystem, built by default with EFI

Pull x86 cleanups from Ingo Molnar:
 "Misc cleanups"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/rtc: Remove duplicate const specifier
  x86, early_serial_console: Remove unnecessary check
  x86, early_serial_console: Remove unused macro XMTRDY
  x86, setup: Rename BOOT_ISDIGIT_H to BOOT_CTYPE_H
  x86, CPU: Fix trivial printk formatting issues with dmesg

Pull x86 asm changes from Ingo Molnar:
 "The main changes in this cycle were the x86/entry and sysret
  enhancements from Andy Lutomirski, see merge commits 772a9aca and
  b57c0b51 for details"

[ Exectutive summary: IST exceptions that interrupt user space will run
  on the regular kernel stack instead of the IST stack.  Which
  simplifies things particularly on return to user space.

  The sysret cleanup ends up simplifying the logic on when we can use
  sysret vs when we have to use iret.                - Linus ]

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86_64, entry: Remove the syscall exit audit and schedule optimizations
  x86_64, entry: Use sysret to return to userspace when possible
  x86, traps: Fix ist_enter from userspace
  x86, vdso: teach 'make clean' remove vdso64 binaries
  x86_64 entry: Fix RCX for ptraced syscalls
  x86: entry_64.S: fold SAVE_ARGS_IRQ macro into its sole user
  x86: ia32entry.S: fix wrong symbolic constant usage: R11->ARGOFFSET
  x86: entry_64.S: delete unused code
  x86, mce: Get rid of TIF_MCE_NOTIFY and associated mce tricks
  x86, traps: Add ist_begin_non_atomic and ist_end_non_atomic
  x86: Clean up current_stack_pointer
  x86, traps: Track entry into and exit from IST context
  x86, entry: Switch stacks on a paranoid entry from userspace

Pull x86 APIC updates from Ingo Molnar:
 "Continued fallout of the conversion of the x86 IRQ code to the
  hierarchical irqdomain framework: more cleanups, simplifications,
  memory allocation behavior enhancements, mainly in the interrupt
  remapping and APIC code"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
  x86, init: Fix UP boot regression on x86_64
  iommu/amd: Fix irq remapping detection logic
  x86/acpi: Make acpi_[un]register_gsi_ioapic() depend on CONFIG_X86_LOCAL_APIC
  x86: Consolidate boot cpu timer setup
  x86/apic: Reuse apic_bsp_setup() for UP APIC setup
  x86/smpboot: Sanitize uniprocessor init
  x86/smpboot: Move apic init code to apic.c
  init: Get rid of x86isms
  x86/apic: Move apic_init_uniprocessor code
  x86/smpboot: Cleanup ioapic handling
  x86/apic: Sanitize ioapic handling
  x86/ioapic: Add proper checks to setp/enable_IO_APIC()
  x86/ioapic: Provide stub functions for IOAPIC%3Dn
  x86/smpboot: Move smpboot inlines to code
  x86/x2apic: Use state information for disable
  x86/x2apic: Split enable and setup function
  x86/x2apic: Disable x2apic from nox2apic setup
  x86/x2apic: Add proper state tracking
  x86/x2apic: Clarify remapping mode for x2apic enablement
  x86/x2apic: Move code in conditional region
  ...

Pull timer updates from Ingo Molnar:
 "The main changes in this cycle were:

   - rework hrtimer expiry calculation in hrtimer_interrupt(): the
     previous code had a subtle bug where expiry caching would miss an
     expiry, resulting in occasional bogus (late) expiry of hrtimers.

   - continuing Y2038 fixes

   - ktime division optimization

   - misc smaller fixes and cleanups"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  hrtimer: Make __hrtimer_get_next_event() static
  rtc: Convert rtc_set_ntp_time() to use timespec64
  rtc: Remove redundant rtc_valid_tm() from rtc_hctosys()
  rtc: Modify rtc_hctosys() to address y2038 issues
  rtc: Update rtc-dev to use y2038-safe time interfaces
  rtc: Update interface.c to use y2038-safe time interfaces
  time: Expose get_monotonic_boottime64 for in-kernel use
  time: Expose getboottime64 for in-kernel uses
  ktime: Optimize ktime_divns for constant divisors
  hrtimer: Prevent stale expiry time in hrtimer_interrupt()
  ktime.h: Introduce ktime_ms_delta

Pull scheduler updates from Ingo Molnar:
 "The main scheduler changes in this cycle were:

   - various sched/deadline fixes and enhancements

   - rescheduling latency fixes/cleanups

   - rework the rq->clock code to be more consistent and more robust.

   - minor micro-optimizations

   - ->avg.decay_count fixes

   - add a stack overflow check to might_sleep()

   - idle-poll handler fix, possibly resulting in power savings

   - misc smaller updates and fixes"

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/Documentation: Remove unneeded word
  sched/wait: Introduce wait_on_bit_timeout()
  sched: Pull resched loop to __schedule() callers
  sched/deadline: Remove cpu_active_mask from cpudl_find()
  sched: Fix hrtick_start() on UP
  sched/deadline: Avoid pointless __setscheduler()
  sched/deadline: Fix stale yield state
  sched/deadline: Fix hrtick for a non-leftmost task
  sched/deadline: Modify cpudl::free_cpus to reflect rd->online
  sched/idle: Add missing checks to the exit condition of cpu_idle_poll()
  sched: Fix missing preemption opportunity
  sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target
  sched/debug: Print rq->clock_task
  sched/core: Rework rq->clock update skips
  sched/core: Validate rq_clock*() serialization
  sched/core: Remove check of p->sched_class
  sched/fair: Fix sched_entity::avg::decay_count initialization
  sched/debug: Fix potential call to __ffs(0) in sched_show_task()
  sched/debug: Check for stack overflow in ___might_sleep()
  sched/fair: Fix the dealing with decay_count in __synchronize_entity_decay()

Pull perf updates from Ingo Molnar:
 "Kernel side changes:

   - AMD range breakpoints support:

     Extend breakpoint tools and core to support address range through
     perf event with initial backend support for AMD extended
     breakpoints.

     The syntax is:

         perf record -e mem:addr/len:type

     For example set write breakpoint from 0x1000 to 0x1200 (0x1000 + 512)

         perf record -e mem:0x1000/512:w

   - event throttling/rotating fixes

   - various event group handling fixes, cleanups and general paranoia
     code to be more robust against bugs in the future.

    - kernel stack overhead fixes

  User-visible tooling side changes:

   - Show precise number of samples in at the end of a 'record' session,
     if processing build ids, since we will then traverse the whole
     perf.data file and see all the PERF_RECORD_SAMPLE records,
     otherwise stop showing the previous off-base heuristicly counted
     number of "samples" (Namhyung Kim).

   - Support to read compressed module from build-id cache (Namhyung
     Kim)

   - Enable sampling loads and stores simultaneously in 'perf mem'
     (Stephane Eranian)

   - 'perf diff' output improvements (Namhyung Kim)

   - Fix error reporting for evsel pgfault constructor (Arnaldo Carvalho
     de Melo)

  Tooling side infrastructure changes:

   - Cache eh/debug frame offset for dwarf unwind (Namhyung Kim)

   - Support parsing parameterized events (Cody P Schafer)

   - Add support for IP address formats in libtraceevent (David Ahern)

  Plus other misc fixes"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)
  perf: Decouple unthrottling and rotating
  perf: Drop module reference on event init failure
  perf: Use POLLIN instead of POLL_IN for perf poll data in flag
  perf: Fix put_event() ctx lock
  perf: Fix move_group() order
  perf: Fix event->ctx locking
  perf: Add a bit of paranoia
  perf symbols: Convert lseek + read to pread
  perf tools: Use perf_data_file__fd() consistently
  perf symbols: Support to read compressed module from build-id cache
  perf evsel: Set attr.task bit for a tracking event
  perf header: Set header version correctly
  perf record: Show precise number of samples
  perf tools: Do not use __perf_session__process_events() directly
  perf callchain: Cache eh/debug frame offset for dwarf unwind
  perf tools: Provide stub for missing pthread_attr_setaffinity_np
  perf evsel: Don't rely on malloc working for sz 0
  tools lib traceevent: Add support for IP address formats
  perf ui/tui: Show fatal error message only if exists
  perf tests: Fix typo in sample-parsing.c
  ...

Pull core locking updates from Ingo Molnar:
 "The main changes are:

   - mutex, completions and rtmutex micro-optimizations
   - lock debugging fix
   - various cleanups in the MCS and the futex code"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rtmutex: Optimize setting task running after being blocked
  locking/rwsem: Use task->state helpers
  sched/completion: Add lock-free checking of the blocking case
  sched/completion: Remove unnecessary ->wait.lock serialization when reading completion state
  locking/mutex: Explicitly mark task as running after wakeup
  futex: Fix argument handling in futex_lock_pi() calls
  doc: Fix misnamed FUTEX_CMP_REQUEUE_PI op constants
  locking/Documentation: Update code path
  softirq/preempt: Add missing current->preempt_disable_ip update
  locking/osq: No need for load/acquire when acquire-polling
  locking/mcs: Better differentiate between MCS variants
  locking/mutex: Introduce ww_mutex_set_context_slowpath()
  locking/mutex: Move MCS related comments to proper location
  locking/mutex: Checking the stamp is WW only

Pull RCU updates from Ingo Molnar:
 "The main RCU changes in this cycle are:

   - Documentation updates.

   - Miscellaneous fixes.

   - Preemptible-RCU fixes, including fixing an old bug in the
     interaction of RCU priority boosting and CPU hotplug.

   - SRCU updates.

   - RCU CPU stall-warning updates.

   - RCU torture-test updates"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
  rcu: Initialize tiny RCU stall-warning timeouts at boot
  rcu: Fix RCU CPU stall detection in tiny implementation
  rcu: Add GP-kthread-starvation checks to CPU stall warnings
  rcu: Make cond_resched_rcu_qs() apply to normal RCU flavors
  rcu: Optionally run grace-period kthreads at real-time priority
  ksoftirqd: Use new cond_resched_rcu_qs() function
  ksoftirqd: Enable IRQs and call cond_resched() before poking RCU
  rcutorture: Add more diagnostics in rcu_barrier() test failure case
  torture: Flag console.log file to prevent holdovers from earlier runs
  torture: Add "-enable-kvm -soundhw pcspk" to qemu command line
  rcutorture: Handle different mpstat versions
  rcutorture: Check from beginning to end of grace period
  rcu: Remove redundant rcu_batches_completed() declaration
  rcutorture: Drop rcu_torture_completed() and friends
  rcu: Provide rcu_batches_completed_sched() for TINY_RCU
  rcutorture: Use unsigned for Reader Batch computations
  rcutorture: Make build-output parsing correctly flag RCU's warnings
  rcu: Make _batches_completed() functions return unsigned long
  rcutorture: Issue warnings on close calls due to Reader Batch blows
  documentation: Fix smp typo in memory-barriers.txt
  ...

Pull regulator updates from Mark Brown:
 "This has not been a busy release for the regulator framework, though
  we do have the first parts of some ongoing work from Bjorn Andersson
  to allow us to support more complex modern systems with dynamic
  configuration of regulators in suspend and idle states.

   - Support for device-specific properties on regulator nodes when
     using simplified DT parsing in the core from Krzysztof Kozlowski.

   - Restructuring of the load tracking code, intended to support future
     improvements in this area for more complex system designs.

   - New drivers for Maxim MAX77843 and Mediatek MT6397.

   - Lots of smaller fixes and improvements"

* tag 'regulator-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (29 commits)
  regulator: max77843: Add max77843 regulator driver
  regulator: Fix build breakage on !REGULATOR
  regulator: Build sysfs entries with static attribute groups
  regulator: qcom-rpm: Make it possible to specify supply
  regulator: core: Consolidate drms update handling
  regulator: qcom-rpm: signedness bug in probe()
  regulator: da9211: Add gpio control for enable/disable of buck
  regulator: qcom_rpm: Don't update vreg->uV/mV if rpm_reg_write fails
  regulator: lp872x: Remove **regulators from struct lp872x
  regulator: da9211: fix unmatched of_node
  regulator: Update documentation after renaming function argument
  regulator: axp20x: Migrate to regulator core's simplified DT parsing code
  regulator: axp20x: Fill regulators_node and of_match descriptor fields
  regulator: pfuze100-regulator: add pfuze3000 support
  regulator: max77686: Document gpio properties
  regulator: Allow parsing custom properties when using simplified DT parsing
  regulator: max77686: Add GPIO control
  regulator: Copy config passed during registration
  regulator: tps65023: Constify struct regmap_config and regulator_ops
  regulator: max8649: Constify struct regmap_config and regulator_ops
  ...

Pull spi updates from Mark Brown:
 "The major highlight this release is a refactoring of the core to allow
  us to run synchronous transfers in the context of the caller when
  there is no contention for the bus.  This improves performance in the
  very common case by eliminating context switches and reducing the
  number of hardware setup and teardown operations we need to perform.

  Other changes:

   - New drivers for DLN-2 USB-SPI adapter and ST SPI controllers.

   - A big round of cleanups, performance and feature improvements for
     the xilinx driver from Ricardo Ribalda Delgado.

   - A wide range of smaller cleanups, fixes and feature improvements
     throughout the subsystem"

* tag 'spi-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (68 commits)
  spi: mxs: cleanup wait_for_completion return handling
  spi: ti-qspi: cleanup wait_for_completion return handling
  spi: spi-imx: cleanup wait_for_completion handling
  spi: sh-msiof: cleanup wait_for_completion return handling
  spi: match var type to return type of wait_for_completion
  spi: spi-pxa2xx: only include mach/dma.h for legacy DMA
  spi: atmel: cleanup wait_for_completion return handling
  spi: fsl-dspi: Remove possible memory leak of 'chip'
  spi: sh-msiof: Update calculation of frequency dividing
  spi: spidev: Convert buf pointers for 32-bit compat SPI_IOC_MESSAGE(n)
  spi/xilinx: Fix access invalid memory on xilinx_spi_tx
  spi: Revert "spi/xilinx: Remove iowrite/ioread wrappers"
  spi/xilinx: Check number of slaves range
  spi/xilinx: Use polling mode on small transfers
  spi/xilinx: Remove remaining_words driver data variable
  spi/xilinx: Remove iowrite/ioread wrappers
  spi/xilinx: Convert bits_per_word in bytes_per_word
  spi/xilinx: Convert remainding_bytes in remaining words
  spi/xilinx: Make spi_tx and spi_rx simmetric
  spi/xilinx: Remove rx_fn and tx_fn pointer
  ...

Pull regmap updates from Mark Brown:
 "A very quiet release for regmap this time around:

   - Fix an endianness issue for I2C devices connected via SMBus where
     we were getting two layers both trying to do endianness handling.
   - Use a union to reduce the size of the regmap struct.
   - A couple of smaller fixes"

* tag 'regmap-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: Fix i2c word access when using SMBus access functions
  regmap: Export regmap_get_val_endian
  regmap: ac97: Clean up indentation
  regmap: correct the description of structure element in reg_field
  regmap: Move spinlock_flags into the union

Merge tag 'hwmon-for-linus-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 "Explicit support for ina231 added to ina2xx driver.

  Minor improvements, cleanup and fixes in various drivers"

* tag 'hwmon-for-linus-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (tmp102) add hibernation callbacks
  hwmon: (ads2828) Only keep data in device data structure if needed
  hwmon: (ads2828) Convert to use regmap
  hwmon: (jc42) Allow negative hysteresis temperatures
  hwmon: (adc128d818) Do proper sign extension
  hwmon: (ad7314) Do proper sign extension
  hwmon: (abx500) Fix format string warnings
  hwmon: (jc42) Fix integer overflow when writing hysteresis value
  hwmon: (jc42) Fix integer overflow
  hwmon: (jc42) Use sign_extend32 for sign extension
  hwmon: (ina2xx) Add ina231 compatible string
  hwmon: (ina2xx) use DIV_ROUND_CLOSEST() to avoid rounding errors
  hwmon: (ina2xx) remove an unnecessary dev_get_drvdata() result check
  hwmon: (ina2xx) implement update_interval attribute for ina226
  hwmon: (ina2xx) make shunt resistance configurable at run-time
  hwmon: (ina2xx) don't accept shunt values greater than the calibration factor
  hwmon: (ina2xx) remove a stray new line
  hwmon: (ina2xx) reinitialize the chip in case it's been reset
  hwmon: (nct7802) Constify struct regmap_config

There was a bad typo in commit 43759d4f ("random: use an improved
fast_mix() function") and I didn't notice because it "looked right", so
I saw what I expected to see when I reviewed it.

Only months later did I look and notice it's not the Threefish-inspired
mix function that I had designed and optimized.

Mea Culpa.  Each input bit still has a chance to affect each output bit,
and the fast pool is spilled *long* before it fills, so it's not a total
disaster, but it's definitely not the intended great improvement.

I'm still working on finding better rotation constants.  These are good
enough, but since it's unrolled twice, it's possible to get better
mixing for free by using eight different constants rather than repeating
the same four.
Signed-off-by: George Spelvin <linux@horizon.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org  # v3.16+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull nios2 fix from Ley Foon Tan:
 "This fixes incorrect behavior of some user programs"

* tag 'nios2-fixes-v3.19-final' of git://git.rocketboards.org/linux-socfpga-next:
  nios2: fix unhandled signals

Pull aio nested sleep annotation from Ben LaHaise,

* git://git.kvack.org/~bcrl/aio-fixes:
  aio: annotate aio_read_event_ring for sleep patterns

Merge tag 'trace-fixes-v3.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull ftrace fixes from Steven Rostedt:
 "During testing Sedat Dilek hit a "suspicious RCU usage" splat that
  pointed out a real bug.  During suspend and resume the tlb_flush
  tracepoint is called when the CPU is going offline.  As the CPU has
  been noted as offline, RCU is ignoring that CPU, which means that it
  can not use RCU protected locks.  When tracepoints are activated, they
  require RCU locking, and if RCU is ignoring a CPU that runs a
  tracepoint, there is a chance that the tracepoint could cause
  corruption.

  The solution was to change the tracepoint into a
  TRACE_EVENT_CONDITION() which allows us to check a condition to
  determine if the tracepoint should be called or not.  If the condition
  is not met, the rcu protected code will not be executed.  By adding
  the condition "cpu_online(smp_processor_id())", this will prevent the
  RCU protected code from being executed if the CPU is marked offline.

  After adding this, another bug was discovered.  As RCU checks rcu
  callers, if a rcu call is not done, there is no check (obviously).  We
  found that tracepoints could be added in RCU ignored locations and not
  have lockdep complain until the tracepoint is activated.  This missed
  places where tracepoints were added in places they should not have
  been.  To fix this, code was added in 3.18 that if lockdep is enabled,
  any tracepoint will still call the rcu checks even if the tracepoint
  is not enabled.  The bug here, is that the check does not take the
  CONDITION into account.  As the condition may prevent tracepoints from
  being activated in RCU ignored areas (as the one patch does), we get
  false positives when we enable lockdep and hit a tracepoint that the
  condition prevents it from being called in a RCU ignored location.

  The fix for this is to add the CONDITION to the rcu checks, even if
  the tracepoint is not enabled"

* tag 'trace-fixes-v3.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  x86/tlb/trace: Do not trace on CPU that is offline
  tracing: Add condition check to RCU lockdep checks

Follow other architectures for user fault handling.
Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com>
Acked-by: Ley Foon Tan <lftan@altera.com>

Merge remote-tracking branches 'spi/topic/sirf', 'spi/topic/spidev', 'spi/topic/st-ssc' and 'spi/topic/ti-qspi' into spi-next

Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/samsung' into spi-next

Merge remote-tracking branches 'spi/topic/img-spfi', 'spi/topic/imx', 'spi/topic/inline', 'spi/topic/meson' and 'spi/topic/mxs' into spi-next

Merge remote-tracking branches 'spi/topic/falcon', 'spi/topic/fsf', 'spi/topic/fsl', 'spi/topic/fsl-dspi' and 'spi/topic/gpio' into spi-next