Fixed typos.

v2: Incorporated changes by Randy Dunlap.
Signed-off-by: NNicolas Kaiser <nikai@nikai.net>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Update LXR (Linux cross reference) web link.
Signed-off-by: NHarry Wei <harryxiyou@gmail.com>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

max_user_instances was removed in this commit:

   commit 9df04e1f
   Author: Davide Libenzi <davidel@xmailserver.org>
   Date:   Thu Jan 29 14:25:26 2009 -0800

    epoll: drop max_user_instances and rely only on max_user_watches

but the documentation entry was not removed.

Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: NLucian Adrian Grijincu <lucian.grijincu@gmail.com>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

v2, updated based on comments from Joe and Paul.

Update to Documentation/dontdiff, based on many updates to
various .gitignore patches over the last 2 years.

Initially begun by Michael Prokop <mika@grml.org>, with lots of
changes by Randy Dunlap.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Michael Prokop <mika@grml.org>
Cc: Joe Perches <joe@perches.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

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

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, apic: Include module.h header in apic_flat_64.c
  x86, apic: Make apic drivers static
  x86, apic: Clean up bigsmp apic selection code
  x86, apic: Use .apicdrivers section for the apic drivers list
  x86, apic: Introduce .apicdrivers section to find the list of apic drivers
  x86, x2apic: Move the common bits to x2apic.h
  x86, x2apic: Minimize IPI register writes using cluster groups
  x86, x2apic: Track the x2apic cluster sibling map
  x86, x2apic: Remove duplicate code for IPI mask routines
  x86, apic: Use probe routines to simplify apic selection
  x86, ioapic: Consolidate mp_ioapic_routing[] into 'struct ioapic'
  x86, ioapic: Consolidate gsi routing info into 'struct ioapic'
  x86, ioapic: Consolidate mp_ioapics[] into 'struct ioapic'
  x86, ioapic: Consolidate ioapic_saved_data[] into 'struct ioapic'
  x86, ioapic: Add struct ioapic
  x86, ioapic: Remove duplicate code for saving/restoring RTEs
  x86, ioapic: Use ioapic_saved_data while enabling intr-remapping
  x86, ioapic: Allocate ioapic_saved_data early
  x86, ioapic: Fix potential resume deadlock

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

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Increase SCHED_LOAD_SCALE resolution
  sched: Introduce SCHED_POWER_SCALE to scale cpu_power calculations
  sched: Cleanup set_load_weight()

* 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (970 commits)
  staging: usbip: replace usbip_u{dbg,err,info} and printk with dev_ and pr_
  staging:iio: Trivial kconfig reorganization and uniformity improvements.
  staging:iio:documenation partial update.
  staging:iio: use pollfunc allocation helpers in remaining drivers.
  staging:iio:max1363 misc cleanups and use of for_each_bit_set to simplify event code spitting out.
  staging:iio: implement an iio_info structure to take some of the constant elements out of iio_dev.
  staging:iio:meter:ade7758: Use private data space from iio_allocate_device
  staging:iio:accel:lis3l02dq make write_reg_8 take value not a pointer to value.
  staging:iio: ring core cleanups + check if read_last available in lis3l02dq
  staging:iio:core cleanup: squash tiny wrappers and use dev_set_name to handle creation of event interface name.
  staging:iio: poll func allocation clean up.
  staging:iio:ad7780 trivial unused header cleanup.
  staging:iio:adc: AD7780: Use private data space from iio_allocate_device + trivial fixes
  staging:iio:adc:AD7780: Convert to new channel registration method
  staging:iio:adc: AD7606: Drop dev_data in favour of iio_priv()
  staging:iio:adc: AD7606: Consitently use indio_dev
  staging:iio: Rip out helper for software rings.
  staging:iio:adc:AD7298: Use private data space from iio_allocate_device
  staging:iio: rationalization of different buffer implementation hooks.
  staging:iio:imu:adis16400 avoid allocating rx, tx, and state separately from iio_dev.
  ...

Fix up trivial conflicts in
 - drivers/staging/intel_sst/intelmid.c: patches applied in both branches
 - drivers/staging/rt2860/common/cmm_data_{pci,usb}.c: removed vs spelling
 - drivers/staging/usbip/vhci_sysfs.c: trivial header file inclusion

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (205 commits)
  USB: EHCI: Remove SPARC_LEON {read,write}_be definitions from ehci.h
  USB: UHCI: Support big endian GRUSBHC HC
  sparc: add {read,write}*_be routines
  USB: UHCI: Add support for big endian descriptors
  USB: UHCI: Use ACCESS_ONCE rather than using a full compiler barrier
  USB: UHCI: Add support for big endian mmio
  usb-storage: Correct adjust_quirks to include latest flags
  usb/isp1760: Fix possible unlink problems
  usb/isp1760: Move function isp1760_endpoint_disable() within file.
  USB: remove remaining usages of hcd->state from usbcore and fix regression
  usb: musb: ux500: add configuration and build options for ux500 dma
  usb: musb: ux500: add dma glue layer for ux500
  usb: musb: ux500: add dma name for ux500
  usb: musb: ux500: add ux500 specific code for gadget side
  usb: musb: fix compile error
  usb-storage: fix up the unusual_realtek device list
  USB: gadget: f_audio: Fix invalid dereference of initdata
  EHCI: don't rescan interrupt QHs needlessly
  OHCI: fix regression caused by nVidia shutdown workaround
  USB: OTG: msm: Free VCCCX regulator even if we can't set the voltage
  ...

apic_flat_64.c needs to include module.h because it uses
EXPORT_SYMBOL_GPL().

This fixes these warnings on some !SMP randconfigs:

  arch/x86/kernel/apic/apic_flat_64.c:31: warning: data definition has no type or storage class
  arch/x86/kernel/apic/apic_flat_64.c:31: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
  arch/x86/kernel/apic/apic_flat_64.c:31: warning: parameter names (without types) in function declaration
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: http://lkml.kernel.org/r/20110523104300.dd532a99.randy.dunlap@oracle.comSigned-off-by: NIngo Molnar <mingo@elte.hu>

* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (48 commits)
  serial: 8250_pci: add support for Cronyx Omega PCI multiserial board.
  tty/serial: Fix break handling for PORT_TEGRA
  tty/serial: Add explicit PORT_TEGRA type
  n_tracerouter and n_tracesink ldisc additions.
  Intel PTI implementaiton of MIPI 1149.7.
  Kernel documentation for the PTI feature.
  export kernel call get_task_comm().
  tty: Remove to support serial for S5P6442
  pch_phub: Support new device ML7223
  8250_pci: Add support for the Digi/IBM PCIe 2-port Adapter
  ASoC: Update cx20442 for TTY API change
  pch_uart: Support new device ML7223 IOH
  parport: Use request_muxed_region for IT87 probe and lock
  tty/serial: add support for Xilinx PS UART
  n_gsm: Use print_hex_dump_bytes
  drivers/tty/moxa.c: Put correct tty value
  TTY: tty_io, annotate locking functions
  TTY: serial_core, remove superfluous set_task_state
  TTY: serial_core, remove invalid test
  Char: moxa, fix locking in moxa_write
  ...

Fix up trivial conflicts in drivers/bluetooth/hci_ldisc.c and
drivers/tty/serial/Makefile.

I did the hci_ldisc thing as an evil merge, cleaning things up.

cpu_sibling_mask() is not defined unless CONFIG_SMP is defined, so it
must not be used directly in the code without ifdef protection.

To solve the problem and avoid ifdefs in the code, define
for_each_sibling() and use it instead.
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  hrtimers: Reorder clock bases
  hrtimers: Avoid touching inactive timer bases
  hrtimers: Make struct hrtimer_cpu_base layout less stupid
  timerfd: Manage cancelable timers in timerfd
  clockevents: Move C3 stop test outside lock
  alarmtimer: Drop device refcount after rtc_open()
  alarmtimer: Check return value of class_find_device()
  timerfd: Allow timers to be cancelled when clock was set
  hrtimers: Prepare for cancel on clock was set timers

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slub: Deal with hyperthetical case of PAGE_SIZE > 2M
  slub: Remove node check in slab_free
  slub: avoid label inside conditional
  slub: Make CONFIG_DEBUG_PAGE_ALLOC work with new fastpath
  slub: Avoid warning for !CONFIG_SLUB_DEBUG
  slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery
  slub: Move debug handlign in __slab_free
  slub: Move node determination out of hotpath
  slub: Eliminate repeated use of c->page through a new page variable
  slub: get_map() function to establish map of free objects in a slab
  slub: Use NUMA_NO_NODE in get_partial
  slub: Fix a typo in config name

Conflicts:
	mm/slub.c

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging:
  hwmon: (coretemp) Fix checkpatch errors
  hwmon: Remove pkgtemp driver
  hwmon: (coretemp) Merge pkgtemp with coretemp
  hwmon: (pmbus) Add support for Analog Devices ADM1275
  hwmon: (pmbus) Support for TI UCD90xxx series Sequencer and System Health Controllers
  hwmon: (pmbus) Add support for TI UCD9200 series of PWM System Controllers
  hwmon: (pmbus) Use device specific function to read fan configuration
  hwmon: (pmbus) Expand scope of device specific get_status function
  hwmon: (pmbus) Introduce infrastructure to detect sensors and limit registers
  hwmon: Driver for MAX16065 System Manager and compatibles
  hwmon: (sht15) add support for CRC validation
  hwmon: (sht15) add support for the status register
  hwmon: (sht15) clean-up the probe function
  hwmon: (sht15) general code clean-up
  hwmon: Add support for MAX6642

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

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools: Fix sample size bit operations
  perf tools: Fix ommitted mmap data update on remap
  watchdog: Change the default timeout and configure nmi watchdog period based on watchdog_thresh
  watchdog: Disable watchdog when thresh is zero
  watchdog: Only disable/enable watchdog if neccessary
  watchdog: Fix rounding bug in get_sample_period()
  perf tools: Propagate event parse error handling
  perf tools: Robustify dynamic sample content fetch
  perf tools: Pre-check sample size before parsing
  perf tools: Move evlist sample helpers to evlist area
  perf tools: Remove junk code in mmap size handling
  perf tools: Check we are able to read the event size on mmap

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  b43: fix comment typo reqest -> request
  Haavard Skinnemoen has left Atmel
  cris: typo in mach-fs Makefile
  Kconfig: fix copy/paste-ism for dell-wmi-aio driver
  doc: timers-howto: fix a typo ("unsgined")
  perf: Only include annotate.h once in tools/perf/util/ui/browsers/annotate.c
  md, raid5: Fix spelling error in comment ('Ofcourse' --> 'Of course').
  treewide: fix a few typos in comments
  regulator: change debug statement be consistent with the style of the rest
  Revert "arm: mach-u300/gpio: Fix mem_region resource size miscalculations"
  audit: acquire creds selectively to reduce atomic op overhead
  rtlwifi: don't touch with treewide double semicolon removal
  treewide: cleanup continuations and remove logging message whitespace
  ath9k_hw: don't touch with treewide double semicolon removal
  include/linux/leds-regulator.h: fix syntax in example code
  tty: fix typo in descripton of tty_termios_encode_baud_rate
  xtensa: remove obsolete BKL kernel option from defconfig
  m68k: fix comment typo 'occcured'
  arch:Kconfig.locks Remove unused config option.
  treewide: remove extra semicolons
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (36 commits)
  HID: hid-multitouch: cosmetic changes, sort classes and devices
  HID: hid-multitouch: class MT_CLS_STANTUM is redundant with MT_CLS_CONFIDENCE
  HID: hid-multitouch: add support for Unitec panels
  HID: hid-multitouch: add support for Touch International panels
  HID: hid-multitouch: add support for GoodTouch panels
  HID: hid-multitouch: add support for CVTouch panels
  HID: hid-multitouch: add support for ActionStar panels
  HID: hiddev: fix race between hiddev_disconnect and hiddev_release
  HID: magicmouse: ignore 'ivalid report id' while switching modes
  HID: fix a crash in hid_report_raw_event() function.
  HID: hid-multitouch: add support for Elo TouchSystems 2515 IntelliTouch Plus
  HID: assorted usage updates from hut 1.12
  HID: roccat: fix actual/startup profile sysfs attribute in koneplus
  HID: hid-multitouch: Add support for Lumio panels
  HID: 'name' and 'phys' in 'struct hid_device' can never be NULL
  HID: hid-multitouch: add support for Ilitek dual-touch panel
  HID: picolcd: Avoid compile warning/error triggered by copy_from_user()
  HID: add support for Logitech G27 wheel
  HID: hiddev: fix error path in hiddev_read when interrupted
  HID: add support for Sony Navigation Controller
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/apm:
  apm-emulation: apm_mutex breaks ACK; remove it
  APM: take over maintainership

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (346 commits)
  ASoC: core: Don't set "(null)" as a driver name
  ALSA: hda - Use LPIB for ATI/AMD chipsets as default
  Revert "ALSA: hda - Use position_fix=3 as default for AMD chipsets"
  ASoC: Tegra: Fix compile when debugfs not enabled
  ASoC: spdif-dit: Add missing MODULE_*
  SOUND: OSS: Remove Au1550 driver.
  ALSA: hda - add Intel Panther Point HDMI codec id
  ALSA: emu10k1 - Add dB range to Bass and Treble for SB Live!
  ALSA: hda - Remove PCM mixer elements from Virtual Master of realtek
  ALSA: hda - Fix input-src parse in patch_analog.c
  ASoC: davinci-mcasp: enable ping-pong SRAM buffers
  ASoC: add iPAQ hx4700 machine driver
  ASoC: Asahi Kasei AK4641 codec driver
  ALSA: hda - Enable Realtek ALC269 codec input layer beep
  ALSA: intel8x0m: enable AMD8111 modem
  ALSA: HDA: Add jack detection for HDMI
  ALSA: sound, core, pcm_lib: fix xrun_log
  ASoC: Max98095: Move existing NULL check before pointer dereference.
  ALSA: sound, core, pcm_lib: xrun_log: log also in_interrupt
  ALSA: usb-audio - Add support for USB X-Fi S51 Pro
  ...

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

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Eliminate various 'set but not used' warnings
  x86, SMEP: Fix section mismatch warnings
  x86, amd: Use _safe() msr access for GartTlbWlk disable code

02e35228 (block: rescan partitions on invalidated devices on
-ENOMEDIA too) relocated partition rescan above explicit bd_set_size()
to simplify condition check.  As rescan_partitions() does its own bdev
size setting, this doesn't break anything; however,
rescan_partitions() prints out the following messages when adjusting
bdev size, which can be confusing.

  sda: detected capacity change from 0 to 146815737856
  sdb: detected capacity change from 0 to 146815737856

This patch restores the original order and remove the warning
messages.

stable: Please apply together with 02e35228 (block: rescan
        partitions on invalidated devices on -ENOMEDIA too).
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NTony Luck <tony.luck@gmail.com>
Tested-by: NTony Luck <tony.luck@gmail.com>
Cc: stable@kernel.org
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'kvm-updates/2.6.40' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (131 commits)
  KVM: MMU: Use ptep_user for cmpxchg_gpte()
  KVM: Fix kvm mmu_notifier initialization order
  KVM: Add documentation for KVM_CAP_NR_VCPUS
  KVM: make guest mode entry to be rcu quiescent state
  KVM: x86 emulator: Make jmp far emulation into a separate function
  KVM: x86 emulator: Rename emulate_grpX() to em_grpX()
  KVM: x86 emulator: Remove unused arg from emulate_pop()
  KVM: x86 emulator: Remove unused arg from writeback()
  KVM: x86 emulator: Remove unused arg from read_descriptor()
  KVM: x86 emulator: Remove unused arg from seg_override()
  KVM: Validate userspace_addr of memslot when registered
  KVM: MMU: Clean up gpte reading with copy_from_user()
  KVM: PPC: booke: add sregs support
  KVM: PPC: booke: save/restore VRSAVE (a.k.a. USPRG0)
  KVM: PPC: use ticks, not usecs, for exit timing
  KVM: PPC: fix exit accounting for SPRs, tlbwe, tlbsx
  KVM: PPC: e500: emulate SVR
  KVM: VMX: Cache vmcs segment fields
  KVM: x86 emulator: consolidate segment accessors
  KVM: VMX: Avoid reading %rip unnecessarily when handling exceptions
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  bnx2x: allow device properly initialize after hotplug
  bnx2x: fix DMAE timeout according to hw specifications
  bnx2x: properly handle CFC DEL in cnic flow
  bnx2x: call dev_kfree_skb_any instead of dev_kfree_skb
  net: filter: move forward declarations to avoid compile warnings
  pktgen: refactor pg_init() code
  pktgen: use vzalloc_node() instead of vmalloc_node() + memset()
  net: skb_trim explicitely check the linearity instead of data_len
  ipv4: Give backtrace in ip_rt_bug().
  net: avoid synchronize_rcu() in dev_deactivate_many
  net: remove synchronize_net() from netdev_set_master()
  rtnetlink: ignore NETDEV_RELEASE and NETDEV_JOIN event
  net: rename NETDEV_BONDING_DESLAVE to NETDEV_RELEASE
  bridge: call NETDEV_JOIN notifiers when add a slave
  netpoll: disable netpoll when enslave a device
  macvlan: Forward unicast frames in bridge mode to lowerdev
  net: Remove linux/prefetch.h include from linux/skbuff.h
  ipv4: Include linux/prefetch.h in fib_trie.c
  netlabel: Remove prefetches from list handlers.
  drivers/net: add prefetch header for prefetch users
  ...

Fixed up prefetch parts: removed a few duplicate prefetch.h includes,
fixed the location of the igb prefetch.h, took my version of the
skbuff.h code without the extra parentheses etc.

* 'exec_rm_compat' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc:
  exec: document acct_arg_size()
  exec: unify do_execve/compat_do_execve code
  exec: introduce struct user_arg_ptr
  exec: introduce get_user_arg_ptr() helper

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
  GFS2: Wait properly when flushing the ail list
  GFS2: Wipe directory hash table metadata when deallocating a directory

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-ktest:
  ktest: Allow options to be used by other options
  ktest: Create variables for the ktest config files
  ktest: Reboot after each patchcheck run
  ktest: Reboot to good kernel after every bisect run
  ktest: If test failed due to timeout, print that
  ktest: Fix post install command

The ordering of the clock bases is historical due to the
CLOCK_REALTIME and CLOCK_MONOTONIC constants. Now the hrtimer bases
have their own enumeration due to the gap between CLOCK_MONOTONIC and
CLOCK_BOOTTIME. So we can be more clever as most timers end up on the
CLOCK_MONOTONIC base due to the virtue of POSIX declaring that
relative CLOCK_REALTIME timers are not affected by time changes. In
desktop environments this is slowly changing as applications switch to
absolute timers, but I've observed empty CLOCK_REALTIME bases often
enough. There is no performance penalty or overhead when
CLOCK_REALTIME timers are active, but in case they are not we don't
skip over a full cache line.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NPeter Zijlstra <peterz@infradead.org>

Instead of iterating over all possible timer bases avoid it by marking
the active bases in the cpu base.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NPeter Zijlstra <peterz@infradead.org>

In the HIGHRES=y case we access the members at the end of struct
hrtimer_cpu_base first and then the one at the beginning. Move the
hrtimer data to front, so we have linear progressing access.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NPeter Zijlstra <peterz@infradead.org>

Peter is concerned about the extra scan of CLOCK_REALTIME_COS in the
timer interrupt. Yes, I did not think about it, because the solution
was so elegant. I didn't like the extra list in timerfd when it was
proposed some time ago, but with a rcu based list the list walk it's
less horrible than the original global lock, which was held over the
list iteration.
Requested-by: NPeter Zijlstra <peterz@infradead.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NPeter Zijlstra <peterz@infradead.org>

What we want is to count the number of bits in the mask,
not some other random operation written in the middle
of the night.
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1306148788-6179-2-git-send-email-fweisbec@gmail.com
[ Fixed perf_event__names[] alignment which was nearby and hurting my eyes ... ]
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Commit eac9eace "perf tools: Check we are able to read the event
size on mmap" brought a check to ensure we can read the size of the
event before dereferencing it, and do a remap otherwise to move the
buffer forward.

However that remap was ommitting all the necessary work to
update the new page offset, head, and to unmap previous pages,
etc...

To fix this, gather all the code that fetches the event in a
seperate helper which does all the necessary checks about the
header/event size and tells us anytime a remap is needed.
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1306148788-6179-3-git-send-email-fweisbec@gmail.comSigned-off-by: NIngo Molnar <mingo@elte.hu>

apm_mutex is locked by a process (e.g. apm -s) at the start of apm_ioctl() and
remains locked while pm_suspend() is called. Any subsequent process trying to
ACK the suspend (e.g. apmd) is then blocked at the start of apm_ioctl(),
causing the suspend to be delayed for 5 seconds in apm_suspend_notifier()
while the ACK times out. In short, ACKs don't work.

The driver's data structures are sufficiently protected by assorted locks. And
pm_suspend() has its own mutex to prevent reentrancy. Consequently there is no
obvious requirement for apm_mutex, which evolved from earlier BKL calls. So
let's remove it.
Signed-off-by: NPaul Parsons <lost.distance@yahoo.com>
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Before the conversion of the NMI watchdog to perf event, the
watchdog timeout was 5 seconds. Now it is 60 seconds. For my
particular application, netbooks, 5 seconds was a better
timeout. With a short timeout, we catch faults earlier and are
able to send back a panic. With a 60 second timeout, the user is
unlikely to wait and will instead hit the power button, causing
us to lose the panic info.

This change configures the NMI period to watchdog_thresh and
sets the softlockup_thresh to watchdog_thresh * 2. In addition,
watchdog_thresh was reduced to 10 seconds as suggested by Ingo
Molnar.
Signed-off-by: NMandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-4-git-send-email-msb@chromium.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
LKML-Reference: <20110517071642.GF22305@elte.hu>

This restores the previous behavior of softlock_thresh.

Currently, setting watchdog_thresh to zero causes the watchdog
kthreads to consume a lot of CPU.

In addition, the logic of proc_dowatchdog_thresh and
proc_dowatchdog_enabled has been factored into proc_dowatchdog.
Signed-off-by: NMandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-3-git-send-email-msb@chromium.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
LKML-Reference: <20110517071018.GE22305@elte.hu>

Don't take any action on an unsuccessful write to /proc.
Signed-off-by: NMandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-2-git-send-email-msb@chromium.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>

In get_sample_period(), softlockup_thresh is integer divided by
5 before the multiplication by NSEC_PER_SEC. This results in
softlockup_thresh being rounded down to the nearest integer
multiple of 5.

For example, a softlockup_thresh of 4 rounds down to 0.
Signed-off-by: NMandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-1-git-send-email-msb@chromium.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>

Recent trivial fix corrected 'occured', but left 'reqest'.
codespell needs another dictionary entry.

cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: NJim Cromie <jim.cromie@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>