The expedited RCU primitives can be quite useful, but they have some
high costs as well.  This commit updates and creates docbook comments
calling out the costs, and updates the RCU documentation as well.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

Because newly offlined CPUs continue executing after completing the
CPU_DYING notifiers, they legitimately enter the scheduler and use
RCU while appearing to be offline.  This calls for a more sophisticated
approach as follows:

1.	RCU marks the CPU online during the CPU_UP_PREPARE phase.

2.	RCU marks the CPU offline during the CPU_DEAD phase.

3.	Diagnostics regarding use of read-side RCU by offline CPUs use
	RCU's accounting rather than the cpu_online_map.  (Note that
	__call_rcu() still uses cpu_online_map to detect illegal
	invocations within CPU_DYING notifiers.)

4.	Offline CPUs are prevented from hanging the system by
	force_quiescent_state(), which pays attention to cpu_online_map.
	Some additional work (in a later commit) will be needed to
	guarantee that force_quiescent_state() waits a full jiffy before
	assuming that a CPU is offline, for example, when called from
	idle entry.  (This commit also makes the one-jiffy wait
	explicit, since the old-style implicit wait can now be defeated
	by RCU_FAST_NO_HZ and by rcutorture.)

This approach avoids the false positives encountered when attempting to
use more exact classification of CPU online/offline state.
Signed-off-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

Add documentation of CONFIG_RCU_CPU_STALL_VERBOSE, CONFIG_RCU_CPU_STALL_INFO,
and RCU_STALL_DELAY_DELTA.  Describe multiple stall-warning messages from
a single stall, and the timing of the subsequent messages.  Add headings.
Remove RCU_SECONDS_TILL_STALL_RECHECK because this value is now computed
at runtime from RCU_CPU_STALL_TIMEOUT, so that sysfs changes to the timeout
value now directly affect the RCU_SECONDS_TILL_STALL_RECHECK value.
Signed-off-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

Add module parameters to rcutorture that induce a CPU stall.
The stall_cpu parameter specifies how long to stall in seconds,
defaulting to zero, which indicates no stalling is to be undertaken.
The stall_cpu_holdoff parameter specifies how many seconds after
insmod (or boot, if rcutorture is built into the kernel) that this
stall is to start.  The default value for stall_cpu_holdoff is ten
seconds.
Signed-off-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

The torture.txt documentation gives an example rcutorture run with a
100-second duration.  This is ridiculously short, unless maybe testing
a fix for a egregious bug.  Use a more-realistic one-hour duration for
the example.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

When rcutorture is started automatically at boot time, it might well
also start CPU-hotplug operations at that time, which might not be
desirable.  This commit therefore adds an rcutorture parameter that
allows CPU-hotplug operations to be held off for the specified number
of seconds after the start of boot.
Signed-off-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

Add publications from 2010 and 2011 to RTFP.txt.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

Two of the bits in the tainted flag are not documented.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix 2 fatal errors in the device-drivers docbook.
Also add some missing files from drivers/base/; since several
of these are DMA-related, add a section for DMA Management.

docproc: drivers/base/sys.c: No such file or directory
docproc: drivers/tty/serial/8250.c: No such file or directory
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix 2 fatal errors in the device-drivers docbook.
Also add some missing files from drivers/base/; since several
of these are DMA-related, add a section for DMA Management.

docproc: drivers/base/sys.c: No such file or directory
docproc: drivers/tty/serial/8250.c: No such file or directory
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add a section which defines the input device properties and provides
guidelines on how to use them.
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>
Reviewed-by: NChase Douglas <chase.douglas@canonical.com>
Reviewed-by: NJussi Pakkanen <jussi.pakkanen@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

We're in tools/lguest now.
Reported-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>

Fix some pinmux typos so implementing pinmux drivers
is a bit easier.
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix new kernel-doc warning.  This file no longer contains
kernel-doc comments.

Warning(include/linux/serial_core.h): no structured comments found
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

It would save me an email round-trip asking which stable tree(s) that a
patch should be applied to, so document that the tree number should be
specified in the email request.
Reported-by: NTomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NTejun Heo <tj@kernel.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Fix warning since kernel scheduler functions and kernel-doc
notation were moved to other files.

docproc: lnx-33-rc1/kernel/sched.c: No such file or directory
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix warning since kernel-doc comments were moved to another
source file.

Warning(lib/iomap.c): no structured comments found
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix new kernel-doc warning.  This file no longer contains
kernel-doc comments.

Warning(include/linux/serial_core.h): no structured comments found
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

It doesn't seem right for the thermal subsystem to export a symbol
named generate_netlink_event. This function is thermal-specific and
its name should reflect that fact. Rename it to
thermal_generate_netlink_event.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NR.Durgadoss <durgadoss.r@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Atmel CAP9 family is not maintained well and products may be
difficult to find now. It will allow to save workforce and
remove LOC during current cleanup process.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

In a paragraph, "kernel thread" is mistakenly written as "kernel". Fix this by
adding thread after word "kernel".

Changes are shown in multiple lines, as they are realigned to 80 col width.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Acked-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

ACPI 5.0 provides extensions to the EINJ mechanism to specify the
target for the error injection - by APICID for cpu related errors,
by address for memory related errors, and by segment/bus/device/function
for PCIe related errors. Also extensions for vendor specific error
injections.
Tested-by: NChen Gong <gong.chen@linux.intel.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Add initial DT support to retrieve the frequency using a
DT attribute instead of the pdata pointer if of_node exist.

Add documentation for omap i2c controller binding.

Based on original patches from Manju and Grant.
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Reviewed-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NKevin Hilman <khilman@ti.com>

Add missing intel_idle.max_cstate in kernel-parameters.txt

Signed-off-by Masanari Iida <standby24x7@gmail.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

On ISDB-T, each layer can have its own independent modulation,
applied to the carriers that belong to the segments associated
with them. So, there's no sense to define a global modulation
parameter.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The ISDB-T differs on its way to implement the hierarchical
transmissions: instead of using a low-priority/high-priority
FEC codes, it does that by using different layers, each layer
with their groups of segments. So, those parameters don't make sense
for ISDB-T.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The units for DTV_FREQUENCY are kHz for satellital delivery systems
(DVB-S/DVB-S2/DVB-TURBO/ISDB-S). Fix it at the API spec.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The temp[1-*]_type attribute reports the temperature sensor type. Sensor type 1
is described as "PII/Celeron Diode", which is quite restrictive; other CPUs
may also have an embedded temperature sensor diode with similar characteristics.
Change description to "CPU embedded diode" to be more generic.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Until we get a datasheet for the IT8728F, treat it as fully compatible
with the IT8721F, as it seems to work reasonably well.

This closes kernel bug #27262.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NGuenter Roeck <guenter.roeck@ericsson.com>

The LM63 and compatible devices have a lookup table to control the fan
speed automatically. Expose it in sysfs. Values are cached for 5
seconds, independently of the other register values to avoid slowing
down "sensors". We might make the table values writable in the future.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Tested-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: NGuenter Roeck <guenter.roeck@ericsson.com>

On the LM64, the tachometer function has a dedicated pin and fan speed
monitoring is always enabled.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NGuenter Roeck <guenter.roeck@ericsson.com>

On LM96163, the external temperature sensor type is configurable to
either a thermal diode or a 3904 transistor. The chip reports a wrong
temperature if misconfigured. Add writable attribute to support it.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The update interval is configurable on LM63 and compatibles. Add
support for it.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

LM96163 is an enhanced version of LM63 with improved PWM resolution. Add chip
detection code as well as support for improved PWM resolution if the chip is
configured to use it.
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

As per the feature removal document, make the tuner type check more strict
so that it is no longer possible to set the radio frequency through a video
node or the TV frequency through a radio node.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As Rupert pointed out, the phrase "It is good practice" should be replaced
with "You must".
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Cc: Rupert Eibauer <Rupert.Eibauer@ces.ch>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Update the spec to the behavior implemented by the control framework.
This should have been documented long ago but for some reason it was
never done.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>