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r: 308381
b: refs/heads/master
c: ecf1b31
h: refs/heads/master
i:
  308379: ff8de53
v: v3
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Arnd Bergmann committed May 14, 2012
1 parent 21d05ef commit 94c27c0
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: 2a5fdc9adde8476751b63a795e3d66ae2ee3979d
refs/heads/master: ecf1b318347f6c250293ee8a9f2597373b00e0c3
19 changes: 19 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-bus-hsi
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What: /sys/bus/hsi
Date: April 2012
KernelVersion: 3.4
Contact: Carlos Chinea <carlos.chinea@nokia.com>
Description:
High Speed Synchronous Serial Interface (HSI) is a
serial interface mainly used for connecting application
engines (APE) with cellular modem engines (CMT) in cellular
handsets.
The bus will be populated with devices (hsi_clients) representing
the protocols available in the system. Bus drivers implement
those protocols.

What: /sys/bus/hsi/devices/.../modalias
Date: April 2012
KernelVersion: 3.4
Contact: Carlos Chinea <carlos.chinea@nokia.com>
Description: Stores the same MODALIAS value emitted by uevent
Format: hsi:<hsi_client device name>
2 changes: 1 addition & 1 deletion trunk/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml
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<refentry id="V4L2-PIX-FMT-NV12M">
<refmeta>
<refentrytitle>V4L2_PIX_FMT_NV12M ('NV12M')</refentrytitle>
<refentrytitle>V4L2_PIX_FMT_NV12M ('NM12')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
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2 changes: 1 addition & 1 deletion trunk/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml
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<refentry id="V4L2-PIX-FMT-YUV420M">
<refmeta>
<refentrytitle>V4L2_PIX_FMT_YUV420M ('YU12M')</refentrytitle>
<refentrytitle>V4L2_PIX_FMT_YUV420M ('YM12')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
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12 changes: 12 additions & 0 deletions trunk/Documentation/devicetree/bindings/arm/fsl.txt
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Freescale i.MX Platforms Device Tree Bindings
-----------------------------------------------

i.MX23 Evaluation Kit
Required root node properties:
- compatible = "fsl,imx23-evk", "fsl,imx23";

i.MX28 Evaluation Kit
Required root node properties:
- compatible = "fsl,imx28-evk", "fsl,imx28";

i.MX51 Babbage Board
Required root node properties:
- compatible = "fsl,imx51-babbage", "fsl,imx51";
Expand Down Expand Up @@ -29,6 +37,10 @@ i.MX6 Quad SABRE Lite Board
Required root node properties:
- compatible = "fsl,imx6q-sabrelite", "fsl,imx6q";

i.MX6 Quad SABRE Smart Device Board
Required root node properties:
- compatible = "fsl,imx6q-sabresd", "fsl,imx6q";

Generic i.MX boards
-------------------

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* Calxeda SATA Controller
* AHCI SATA Controller

SATA nodes are defined to describe on-chip Serial ATA controllers.
Each SATA controller should have its own node.

Required properties:
- compatible : compatible list, contains "calxeda,hb-ahci"
- compatible : compatible list, contains "calxeda,hb-ahci" or "snps,spear-ahci"
- interrupts : <interrupt mapping for SATA IRQ>
- reg : <registers mapping>

Expand All @@ -14,4 +14,3 @@ Example:
reg = <0xffe08000 0x1000>;
interrupts = <115>;
};

19 changes: 19 additions & 0 deletions trunk/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
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* Freescale MXS DMA

Required properties:
- compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx"
- reg : Should contain registers location and length

Supported chips:
imx23, imx28.

Examples:
dma-apbh@80004000 {
compatible = "fsl,imx28-dma-apbh";
reg = <0x80004000 2000>;
};

dma-apbx@80024000 {
compatible = "fsl,imx28-dma-apbx";
reg = <0x80024000 2000>;
};
87 changes: 87 additions & 0 deletions trunk/Documentation/devicetree/bindings/gpio/gpio-mxs.txt
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* Freescale MXS GPIO controller

The Freescale MXS GPIO controller is part of MXS PIN controller. The
GPIOs are organized in port/bank. Each port consists of 32 GPIOs.

As the GPIO controller is embedded in the PIN controller and all the
GPIO ports share the same IO space with PIN controller, the GPIO node
will be represented as sub-nodes of MXS pinctrl node.

Required properties for GPIO node:
- compatible : Should be "fsl,<soc>-gpio". The supported SoCs include
imx23 and imx28.
- interrupts : Should be the port interrupt shared by all 32 pins.
- gpio-controller : Marks the device node as a gpio controller.
- #gpio-cells : Should be two. The first cell is the pin number and
the second cell is used to specify optional parameters (currently
unused).
- interrupt-controller: Marks the device node as an interrupt controller.
- #interrupt-cells : Should be 2. The first cell is the GPIO number.
The second cell bits[3:0] is used to specify trigger type and level flags:
1 = low-to-high edge triggered.
2 = high-to-low edge triggered.
4 = active high level-sensitive.
8 = active low level-sensitive.

Note: Each GPIO port should have an alias correctly numbered in "aliases"
node.

Examples:

aliases {
gpio0 = &gpio0;
gpio1 = &gpio1;
gpio2 = &gpio2;
gpio3 = &gpio3;
gpio4 = &gpio4;
};

pinctrl@80018000 {
compatible = "fsl,imx28-pinctrl", "simple-bus";
reg = <0x80018000 2000>;

gpio0: gpio@0 {
compatible = "fsl,imx28-gpio";
interrupts = <127>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};

gpio1: gpio@1 {
compatible = "fsl,imx28-gpio";
interrupts = <126>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};

gpio2: gpio@2 {
compatible = "fsl,imx28-gpio";
interrupts = <125>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};

gpio3: gpio@3 {
compatible = "fsl,imx28-gpio";
interrupts = <124>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};

gpio4: gpio@4 {
compatible = "fsl,imx28-gpio";
interrupts = <123>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};
};
16 changes: 16 additions & 0 deletions trunk/Documentation/devicetree/bindings/i2c/i2c-mxs.txt
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* Freescale MXS Inter IC (I2C) Controller

Required properties:
- compatible: Should be "fsl,<chip>-i2c"
- reg: Should contain registers location and length
- interrupts: Should contain ERROR and DMA interrupts

Examples:

i2c0: i2c@80058000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx28-i2c";
reg = <0x80058000 2000>;
interrupts = <111 68>;
};
25 changes: 25 additions & 0 deletions trunk/Documentation/devicetree/bindings/mmc/mxs-mmc.txt
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* Freescale MXS MMC controller

The Freescale MXS Synchronous Serial Ports (SSP) can act as a MMC controller
to support MMC, SD, and SDIO types of memory cards.

Required properties:
- compatible: Should be "fsl,<chip>-mmc". The supported chips include
imx23 and imx28.
- reg: Should contain registers location and length
- interrupts: Should contain ERROR and DMA interrupts
- fsl,ssp-dma-channel: APBH DMA channel for the SSP
- bus-width: Number of data lines, can be <1>, <4>, or <8>

Optional properties:
- wp-gpios: Specify GPIOs for write protection

Examples:

ssp0: ssp@80010000 {
compatible = "fsl,imx28-mmc";
reg = <0x80010000 2000>;
interrupts = <96 82>;
fsl,ssp-dma-channel = <0>;
bus-width = <8>;
};
2 changes: 1 addition & 1 deletion trunk/Documentation/devicetree/bindings/net/fsl-fec.txt
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Expand Up @@ -14,7 +14,7 @@ Optional properties:

Example:

fec@83fec000 {
ethernet@83fec000 {
compatible = "fsl,imx51-fec", "fsl,imx27-fec";
reg = <0x83fec000 0x4000>;
interrupts = <87>;
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2 changes: 2 additions & 0 deletions trunk/Documentation/devicetree/bindings/sound/sgtl5000.txt
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Expand Up @@ -3,6 +3,8 @@
Required properties:
- compatible : "fsl,sgtl5000".

- reg : the I2C address of the device

Example:

codec: sgtl5000@0a {
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Expand Up @@ -11,7 +11,7 @@ Optional properties:

Example:

uart@73fbc000 {
serial@73fbc000 {
compatible = "fsl,imx51-uart", "fsl,imx21-uart";
reg = <0x73fbc000 0x4000>;
interrupts = <31>;
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4 changes: 2 additions & 2 deletions trunk/Documentation/networking/ip-sysctl.txt
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Expand Up @@ -147,7 +147,7 @@ tcp_adv_win_scale - INTEGER
(if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
if it is <= 0.
Possible values are [-31, 31], inclusive.
Default: 2
Default: 1

tcp_allowed_congestion_control - STRING
Show/set the congestion control choices available to non-privileged
Expand Down Expand Up @@ -410,7 +410,7 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
net.core.rmem_max. Calling setsockopt() with SO_RCVBUF disables
automatic tuning of that socket's receive buffer size, in which
case this value is ignored.
Default: between 87380B and 4MB, depending on RAM size.
Default: between 87380B and 6MB, depending on RAM size.

tcp_sack - BOOLEAN
Enable select acknowledgments (SACKS).
Expand Down
37 changes: 19 additions & 18 deletions trunk/Documentation/power/freezing-of-tasks.txt
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Expand Up @@ -9,38 +9,39 @@ architectures).

II. How does it work?

There are four per-task flags used for that, PF_NOFREEZE, PF_FROZEN, TIF_FREEZE
There are three per-task flags used for that, PF_NOFREEZE, PF_FROZEN
and PF_FREEZER_SKIP (the last one is auxiliary). The tasks that have
PF_NOFREEZE unset (all user space processes and some kernel threads) are
regarded as 'freezable' and treated in a special way before the system enters a
suspend state as well as before a hibernation image is created (in what follows
we only consider hibernation, but the description also applies to suspend).

Namely, as the first step of the hibernation procedure the function
freeze_processes() (defined in kernel/power/process.c) is called. It executes
try_to_freeze_tasks() that sets TIF_FREEZE for all of the freezable tasks and
either wakes them up, if they are kernel threads, or sends fake signals to them,
if they are user space processes. A task that has TIF_FREEZE set, should react
to it by calling the function called __refrigerator() (defined in
kernel/freezer.c), which sets the task's PF_FROZEN flag, changes its state
to TASK_UNINTERRUPTIBLE and makes it loop until PF_FROZEN is cleared for it.
Then, we say that the task is 'frozen' and therefore the set of functions
handling this mechanism is referred to as 'the freezer' (these functions are
defined in kernel/power/process.c, kernel/freezer.c & include/linux/freezer.h).
User space processes are generally frozen before kernel threads.
freeze_processes() (defined in kernel/power/process.c) is called. A system-wide
variable system_freezing_cnt (as opposed to a per-task flag) is used to indicate
whether the system is to undergo a freezing operation. And freeze_processes()
sets this variable. After this, it executes try_to_freeze_tasks() that sends a
fake signal to all user space processes, and wakes up all the kernel threads.
All freezable tasks must react to that by calling try_to_freeze(), which
results in a call to __refrigerator() (defined in kernel/freezer.c), which sets
the task's PF_FROZEN flag, changes its state to TASK_UNINTERRUPTIBLE and makes
it loop until PF_FROZEN is cleared for it. Then, we say that the task is
'frozen' and therefore the set of functions handling this mechanism is referred
to as 'the freezer' (these functions are defined in kernel/power/process.c,
kernel/freezer.c & include/linux/freezer.h). User space processes are generally
frozen before kernel threads.

__refrigerator() must not be called directly. Instead, use the
try_to_freeze() function (defined in include/linux/freezer.h), that checks
the task's TIF_FREEZE flag and makes the task enter __refrigerator() if the
flag is set.
if the task is to be frozen and makes the task enter __refrigerator().

For user space processes try_to_freeze() is called automatically from the
signal-handling code, but the freezable kernel threads need to call it
explicitly in suitable places or use the wait_event_freezable() or
wait_event_freezable_timeout() macros (defined in include/linux/freezer.h)
that combine interruptible sleep with checking if TIF_FREEZE is set and calling
try_to_freeze(). The main loop of a freezable kernel thread may look like the
following one:
that combine interruptible sleep with checking if the task is to be frozen and
calling try_to_freeze(). The main loop of a freezable kernel thread may look
like the following one:

set_freezable();
do {
Expand All @@ -53,7 +54,7 @@ following one:
(from drivers/usb/core/hub.c::hub_thread()).

If a freezable kernel thread fails to call try_to_freeze() after the freezer has
set TIF_FREEZE for it, the freezing of tasks will fail and the entire
initiated a freezing operation, the freezing of tasks will fail and the entire
hibernation operation will be cancelled. For this reason, freezable kernel
threads must call try_to_freeze() somewhere or use one of the
wait_event_freezable() and wait_event_freezable_timeout() macros.
Expand Down
14 changes: 13 additions & 1 deletion trunk/Documentation/security/keys.txt
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Expand Up @@ -123,7 +123,7 @@ KEY SERVICE OVERVIEW

The key service provides a number of features besides keys:

(*) The key service defines two special key types:
(*) The key service defines three special key types:

(+) "keyring"

Expand All @@ -137,6 +137,18 @@ The key service provides a number of features besides keys:
blobs of data. These can be created, updated and read by userspace,
and aren't intended for use by kernel services.

(+) "logon"

Like a "user" key, a "logon" key has a payload that is an arbitrary
blob of data. It is intended as a place to store secrets which are
accessible to the kernel but not to userspace programs.

The description can be arbitrary, but must be prefixed with a non-zero
length string that describes the key "subclass". The subclass is
separated from the rest of the description by a ':'. "logon" keys can
be created and updated from userspace, but the payload is only
readable from kernel space.

(*) Each process subscribes to three keyrings: a thread-specific keyring, a
process-specific keyring, and a session-specific keyring.

Expand Down
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