Merge branch 'master' into for-next

96 files changed, 2258 insertions, 242 deletions

diff --git a/Documentation/ABI/stable/thermal-notification b/Documentation/ABI/stable/thermal-notification
new file mode 100644
index 000000000000..9723e8b7aeb3
--- /dev/null
+++ b/Documentation/ABI/stable/thermal-notification
@@ -0,0 +1,4 @@
+What:		A notification mechanism for thermal related events
+Description:
+	This interface enables notification for thermal related events.
+	The notification is in the form of a netlink event.
diff --git a/Documentation/ABI/testing/sysfs-platform-at91 b/Documentation/ABI/testing/sysfs-platform-at91
new file mode 100644
index 000000000000..4cc6a865ae66
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-at91
@@ -0,0 +1,25 @@
+What:		/sys/devices/platform/at91_can/net/<iface>/mb0_id
+Date:		January 2011
+KernelVersion:	2.6.38
+Contact:	Marc Kleine-Budde <kernel@pengutronix.de>
+Description:
+		Value representing the can_id of mailbox 0.
+
+		Default: 0x7ff (standard frame)
+
+		Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in
+		"AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the
+		contents of mailbox 0 may be send under certain
+		conditions (even if disabled or in rx mode).
+
+		The workaround in the errata suggests not to use the
+		mailbox and load it with an unused identifier.
+
+		In order to use an extended can_id add the
+		CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
+
+		- standard id 0x7ff:
+		echo 0x7ff      > /sys/class/net/can0/mb0_id
+
+		- extended id 0x1fffffff:
+		echo 0x9fffffff > /sys/class/net/can0/mb0_id
diff --git a/Documentation/DocBook/80211.tmpl b/Documentation/DocBook/80211.tmpl
index 03641a08e275..8906648f962b 100644
--- a/Documentation/DocBook/80211.tmpl
+++ b/Documentation/DocBook/80211.tmpl
@@ -268,10 +268,6 @@
 !Finclude/net/mac80211.h ieee80211_ops
 !Finclude/net/mac80211.h ieee80211_alloc_hw
 !Finclude/net/mac80211.h ieee80211_register_hw
-!Finclude/net/mac80211.h ieee80211_get_tx_led_name
-!Finclude/net/mac80211.h ieee80211_get_rx_led_name
-!Finclude/net/mac80211.h ieee80211_get_assoc_led_name
-!Finclude/net/mac80211.h ieee80211_get_radio_led_name
 !Finclude/net/mac80211.h ieee80211_unregister_hw
 !Finclude/net/mac80211.h ieee80211_free_hw
       </chapter>
@@ -382,6 +378,23 @@
         </para>
       </partintro>
 
+      <chapter id="led-support">
+        <title>LED support</title>
+        <para>
+         Mac80211 supports various ways of blinking LEDs. Wherever possible,
+         device LEDs should be exposed as LED class devices and hooked up to
+         the appropriate trigger, which will then be triggered appropriately
+         by mac80211.
+        </para>
+!Finclude/net/mac80211.h ieee80211_get_tx_led_name
+!Finclude/net/mac80211.h ieee80211_get_rx_led_name
+!Finclude/net/mac80211.h ieee80211_get_assoc_led_name
+!Finclude/net/mac80211.h ieee80211_get_radio_led_name
+!Finclude/net/mac80211.h ieee80211_tpt_blink
+!Finclude/net/mac80211.h ieee80211_tpt_led_trigger_flags
+!Finclude/net/mac80211.h ieee80211_create_tpt_led_trigger
+      </chapter>
+
       <chapter id="hardware-crypto-offload">
         <title>Hardware crypto acceleration</title>
 !Pinclude/net/mac80211.h Hardware crypto acceleration
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
index 35447e081736..36f63d4a0a06 100644
--- a/Documentation/DocBook/device-drivers.tmpl
+++ b/Documentation/DocBook/device-drivers.tmpl
@@ -217,8 +217,8 @@ X!Isound/sound_firmware.c
   <chapter id="uart16x50">
      <title>16x50 UART Driver</title>
 !Iinclude/linux/serial_core.h
-!Edrivers/serial/serial_core.c
-!Edrivers/serial/8250.c
+!Edrivers/tty/serial/serial_core.c
+!Edrivers/tty/serial/8250.c
   </chapter>
 
   <chapter id="fbdev">
diff --git a/Documentation/DocBook/dvb/dvbapi.xml b/Documentation/DocBook/dvb/dvbapi.xml
index e3a97fdd62a6..ad8678d48916 100644
--- a/Documentation/DocBook/dvb/dvbapi.xml
+++ b/Documentation/DocBook/dvb/dvbapi.xml
@@ -28,7 +28,7 @@
 	<holder>Convergence GmbH</holder>
 </copyright>
 <copyright>
-	<year>2009-2010</year>
+	<year>2009-2011</year>
 	<holder>Mauro Carvalho Chehab</holder>
 </copyright>
 
diff --git a/Documentation/DocBook/media.tmpl b/Documentation/DocBook/media.tmpl
index f11048d4053f..a99088aae1aa 100644
--- a/Documentation/DocBook/media.tmpl
+++ b/Documentation/DocBook/media.tmpl
@@ -28,7 +28,7 @@
 <title>LINUX MEDIA INFRASTRUCTURE API</title>
 
 <copyright>
-	<year>2009-2010</year>
+	<year>2009-2011</year>
 	<holder>LinuxTV Developers</holder>
 </copyright>
 
@@ -86,7 +86,7 @@ Foundation. A copy of the license is included in the chapter entitled
 </author>
 </authorgroup>
 <copyright>
-	<year>2009-2010</year>
+	<year>2009-2011</year>
 	<holder>Mauro Carvalho Chehab</holder>
 </copyright>
 
diff --git a/Documentation/DocBook/v4l/dev-rds.xml b/Documentation/DocBook/v4l/dev-rds.xml
index 360d2737e649..2427f54397e7 100644
--- a/Documentation/DocBook/v4l/dev-rds.xml
+++ b/Documentation/DocBook/v4l/dev-rds.xml
@@ -75,6 +75,7 @@ as follows:</para>
   </section>
 
   <section>
+    <title>RDS datastructures</title>
     <table frame="none" pgwide="1" id="v4l2-rds-data">
       <title>struct
 <structname>v4l2_rds_data</structname></title>
@@ -129,10 +130,11 @@ as follows:</para>
 
     <table frame="none" pgwide="1" id="v4l2-rds-block-codes">
       <title>Block defines</title>
-      <tgroup cols="3">
+      <tgroup cols="4">
 	<colspec colname="c1" colwidth="1*" />
 	<colspec colname="c2" colwidth="1*" />
-	<colspec colname="c3" colwidth="5*" />
+	<colspec colname="c3" colwidth="1*" />
+	<colspec colname="c4" colwidth="5*" />
 	<tbody valign="top">
 	  <row>
 	    <entry>V4L2_RDS_BLOCK_MSK</entry>
diff --git a/Documentation/DocBook/v4l/v4l2.xml b/Documentation/DocBook/v4l/v4l2.xml
index 839e93e875ae..9288af96de34 100644
--- a/Documentation/DocBook/v4l/v4l2.xml
+++ b/Documentation/DocBook/v4l/v4l2.xml
@@ -100,6 +100,7 @@ Remote Controller chapter.</contrib>
       <year>2008</year>
       <year>2009</year>
       <year>2010</year>
+      <year>2011</year>
       <holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
 Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab</holder>
     </copyright>
@@ -381,7 +382,7 @@ and discussions on the V4L mailing list.</revremark>
 </partinfo>
 
 <title>Video for Linux Two API Specification</title>
- <subtitle>Revision 2.6.33</subtitle>
+ <subtitle>Revision 2.6.38</subtitle>
 
   <chapter id="common">
     &sub-common;
diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index 69dd29ed824e..b2bea15137d2 100644
--- a/Documentation/IPMI.txt
+++ b/Documentation/IPMI.txt
@@ -533,6 +533,33 @@ completion during sending a panic event.
 Other Pieces
 ------------
 
+Get the detailed info related with the IPMI device
+--------------------------------------------------
+
+Some users need more detailed information about a device, like where
+the address came from or the raw base device for the IPMI interface.
+You can use the IPMI smi_watcher to catch the IPMI interfaces as they
+come or go, and to grab the information, you can use the function
+ipmi_get_smi_info(), which returns the following structure:
+
+struct ipmi_smi_info {
+	enum ipmi_addr_src addr_src;
+	struct device *dev;
+	union {
+		struct {
+			void *acpi_handle;
+		} acpi_info;
+	} addr_info;
+};
+
+Currently special info for only for SI_ACPI address sources is
+returned.  Others may be added as necessary.
+
+Note that the dev pointer is included in the above structure, and
+assuming ipmi_smi_get_info returns success, you must call put_device
+on the dev pointer.
+
+
 Watchdog
 --------
 
diff --git a/Documentation/acpi/apei/output_format.txt b/Documentation/acpi/apei/output_format.txt
new file mode 100644
index 000000000000..9146952c612a
--- /dev/null
+++ b/Documentation/acpi/apei/output_format.txt
@@ -0,0 +1,122 @@
+                     APEI output format
+                     ~~~~~~~~~~~~~~~~~~
+
+APEI uses printk as hardware error reporting interface, the output
+format is as follow.
+
+<error record> :=
+APEI generic hardware error status
+severity: <integer>, <severity string>
+section: <integer>, severity: <integer>, <severity string>
+flags: <integer>
+<section flags strings>
+fru_id: <uuid string>
+fru_text: <string>
+section_type: <section type string>
+<section data>
+
+<severity string>* := recoverable | fatal | corrected | info
+
+<section flags strings># :=
+[primary][, containment warning][, reset][, threshold exceeded]\
+[, resource not accessible][, latent error]
+
+<section type string> := generic processor error | memory error | \
+PCIe error | unknown, <uuid string>
+
+<section data> :=
+<generic processor section data> | <memory section data> | \
+<pcie section data> | <null>
+
+<generic processor section data> :=
+[processor_type: <integer>, <proc type string>]
+[processor_isa: <integer>, <proc isa string>]
+[error_type: <integer>
+<proc error type strings>]
+[operation: <integer>, <proc operation string>]
+[flags: <integer>
+<proc flags strings>]
+[level: <integer>]
+[version_info: <integer>]
+[processor_id: <integer>]
+[target_address: <integer>]
+[requestor_id: <integer>]
+[responder_id: <integer>]
+[IP: <integer>]
+
+<proc type string>* := IA32/X64 | IA64
+
+<proc isa string>* := IA32 | IA64 | X64
+
+<processor error type strings># :=
+[cache error][, TLB error][, bus error][, micro-architectural error]
+
+<proc operation string>* := unknown or generic | data read | data write | \
+instruction execution
+
+<proc flags strings># :=
+[restartable][, precise IP][, overflow][, corrected]
+
+<memory section data> :=
+[error_status: <integer>]
+[physical_address: <integer>]
+[physical_address_mask: <integer>]
+[node: <integer>]
+[card: <integer>]
+[module: <integer>]
+[bank: <integer>]
+[device: <integer>]
+[row: <integer>]
+[column: <integer>]
+[bit_position: <integer>]
+[requestor_id: <integer>]
+[responder_id: <integer>]
+[target_id: <integer>]
+[error_type: <integer>, <mem error type string>]
+
+<mem error type string>* :=
+unknown | no error | single-bit ECC | multi-bit ECC | \
+single-symbol chipkill ECC | multi-symbol chipkill ECC | master abort | \
+target abort | parity error | watchdog timeout | invalid address | \
+mirror Broken | memory sparing | scrub corrected error | \
+scrub uncorrected error
+
+<pcie section data> :=
+[port_type: <integer>, <pcie port type string>]
+[version: <integer>.<integer>]
+[command: <integer>, status: <integer>]
+[device_id: <integer>:<integer>:<integer>.<integer>
+slot: <integer>
+secondary_bus: <integer>
+vendor_id: <integer>, device_id: <integer>
+class_code: <integer>]
+[serial number: <integer>, <integer>]
+[bridge: secondary_status: <integer>, control: <integer>]
+
+<pcie port type string>* := PCIe end point | legacy PCI end point | \
+unknown | unknown | root port | upstream switch port | \
+downstream switch port | PCIe to PCI/PCI-X bridge | \
+PCI/PCI-X to PCIe bridge | root complex integrated endpoint device | \
+root complex event collector
+
+Where, [] designate corresponding content is optional
+
+All <field string> description with * has the following format:
+
+field: <integer>, <field string>
+
+Where value of <integer> should be the position of "string" in <field
+string> description. Otherwise, <field string> will be "unknown".
+
+All <field strings> description with # has the following format:
+
+field: <integer>
+<field strings>
+
+Where each string in <fields strings> corresponding to one set bit of
+<integer>. The bit position is the position of "string" in <field
+strings> description.
+
+For more detailed explanation of every field, please refer to UEFI
+specification version 2.3 or later, section Appendix N: Common
+Platform Error Record.
diff --git a/Documentation/arm/Booting b/Documentation/arm/Booting
index 76850295af8f..4e686a2ed91e 100644
--- a/Documentation/arm/Booting
+++ b/Documentation/arm/Booting
@@ -65,13 +65,19 @@ looks at the connected hardware is beyond the scope of this document.
 The boot loader must ultimately be able to provide a MACH_TYPE_xxx
 value to the kernel. (see linux/arch/arm/tools/mach-types).
 
-
-4. Setup the kernel tagged list
--------------------------------
+4. Setup boot data
+------------------
 
 Existing boot loaders:		OPTIONAL, HIGHLY RECOMMENDED
 New boot loaders:		MANDATORY
 
+The boot loader must provide either a tagged list or a dtb image for
+passing configuration data to the kernel.  The physical address of the
+boot data is passed to the kernel in register r2.
+
+4a. Setup the kernel tagged list
+--------------------------------
+
 The boot loader must create and initialise the kernel tagged list.
 A valid tagged list starts with ATAG_CORE and ends with ATAG_NONE.
 The ATAG_CORE tag may or may not be empty.  An empty ATAG_CORE tag
@@ -101,6 +107,24 @@ The tagged list must be placed in a region of memory where neither
 the kernel decompressor nor initrd 'bootp' program will overwrite
 it.  The recommended placement is in the first 16KiB of RAM.
 
+4b. Setup the device tree
+-------------------------
+
+The boot loader must load a device tree image (dtb) into system ram
+at a 64bit aligned address and initialize it with the boot data.  The
+dtb format is documented in Documentation/devicetree/booting-without-of.txt.
+The kernel will look for the dtb magic value of 0xd00dfeed at the dtb
+physical address to determine if a dtb has been passed instead of a
+tagged list.
+
+The boot loader must pass at a minimum the size and location of the
+system memory, and the root filesystem location.  The dtb must be
+placed in a region of memory where the kernel decompressor will not
+overwrite it.  The recommended placement is in the first 16KiB of RAM
+with the caveat that it may not be located at physical address 0 since
+the kernel interprets a value of 0 in r2 to mean neither a tagged list
+nor a dtb were passed.
+
 5. Calling the kernel image
 ---------------------------
 
@@ -125,7 +149,8 @@ In either case, the following conditions must be met:
 - CPU register settings
   r0 = 0,
   r1 = machine type number discovered in (3) above.
-  r2 = physical address of tagged list in system RAM.
+  r2 = physical address of tagged list in system RAM, or
+       physical address of device tree block (dtb) in system RAM
 
 - CPU mode
   All forms of interrupts must be disabled (IRQs and FIQs)
diff --git a/Documentation/device-mapper/dm-crypt.txt b/Documentation/device-mapper/dm-crypt.txt
index ddeb749c5503..6b5c42dbbe84 100644
--- a/Documentation/device-mapper/dm-crypt.txt
+++ b/Documentation/device-mapper/dm-crypt.txt
@@ -8,7 +8,7 @@ Parameters: <cipher> <key> <iv_offset> <device path> <offset>
 
 <cipher>
     Encryption cipher and an optional IV generation mode.
-    (In format cipher-chainmode-ivopts:ivmode).
+    (In format cipher[:keycount]-chainmode-ivopts:ivmode).
     Examples:
        des
        aes-cbc-essiv:sha256
@@ -20,6 +20,11 @@ Parameters: <cipher> <key> <iv_offset> <device path> <offset>
     Key used for encryption. It is encoded as a hexadecimal number.
     You can only use key sizes that are valid for the selected cipher.
 
+<keycount>
+    Multi-key compatibility mode. You can define <keycount> keys and
+    then sectors are encrypted according to their offsets (sector 0 uses key0;
+    sector 1 uses key1 etc.).  <keycount> must be a power of two.
+
 <iv_offset>
     The IV offset is a sector count that is added to the sector number
     before creating the IV.
diff --git a/Documentation/device-mapper/dm-raid.txt b/Documentation/device-mapper/dm-raid.txt
new file mode 100644
index 000000000000..33b6b7071ac8
--- /dev/null
+++ b/Documentation/device-mapper/dm-raid.txt
@@ -0,0 +1,70 @@
+Device-mapper RAID (dm-raid) is a bridge from DM to MD.  It
+provides a way to use device-mapper interfaces to access the MD RAID
+drivers.
+
+As with all device-mapper targets, the nominal public interfaces are the
+constructor (CTR) tables and the status outputs (both STATUSTYPE_INFO
+and STATUSTYPE_TABLE).  The CTR table looks like the following:
+
+1: <s> <l> raid \
+2:      <raid_type> <#raid_params> <raid_params> \
+3:      <#raid_devs> <meta_dev1> <dev1> .. <meta_devN> <devN>
+
+Line 1 contains the standard first three arguments to any device-mapper
+target - the start, length, and target type fields.  The target type in
+this case is "raid".
+
+Line 2 contains the arguments that define the particular raid
+type/personality/level, the required arguments for that raid type, and
+any optional arguments.  Possible raid types include: raid4, raid5_la,
+raid5_ls, raid5_rs, raid6_zr, raid6_nr, and raid6_nc.  (raid1 is
+planned for the future.)  The list of required and optional parameters
+is the same for all the current raid types.  The required parameters are
+positional, while the optional parameters are given as key/value pairs.
+The possible parameters are as follows:
+ <chunk_size>           Chunk size in sectors.
+ [[no]sync]             Force/Prevent RAID initialization
+ [rebuild <idx>]        Rebuild the drive indicated by the index
+ [daemon_sleep <ms>]    Time between bitmap daemon work to clear bits
+ [min_recovery_rate <kB/sec/disk>]      Throttle RAID initialization
+ [max_recovery_rate <kB/sec/disk>]      Throttle RAID initialization
+ [max_write_behind <sectors>]           See '-write-behind=' (man mdadm)
+ [stripe_cache <sectors>]               Stripe cache size for higher RAIDs
+
+Line 3 contains the list of devices that compose the array in
+metadata/data device pairs.  If the metadata is stored separately, a '-'
+is given for the metadata device position.  If a drive has failed or is
+missing at creation time, a '-' can be given for both the metadata and
+data drives for a given position.
+
+NB. Currently all metadata devices must be specified as '-'.
+
+Examples:
+# RAID4 - 4 data drives, 1 parity
+# No metadata devices specified to hold superblock/bitmap info
+# Chunk size of 1MiB
+# (Lines separated for easy reading)
+0 1960893648 raid \
+        raid4 1 2048 \
+        5 - 8:17 - 8:33 - 8:49 - 8:65 - 8:81
+
+# RAID4 - 4 data drives, 1 parity (no metadata devices)
+# Chunk size of 1MiB, force RAID initialization,
+#       min recovery rate at 20 kiB/sec/disk
+0 1960893648 raid \
+        raid4 4 2048 min_recovery_rate 20 sync\
+        5 - 8:17 - 8:33 - 8:49 - 8:65 - 8:81
+
+Performing a 'dmsetup table' should display the CTR table used to
+construct the mapping (with possible reordering of optional
+parameters).
+
+Performing a 'dmsetup status' will yield information on the state and
+health of the array.  The output is as follows:
+1: <s> <l> raid \
+2:      <raid_type> <#devices> <1 health char for each dev> <resync_ratio>
+
+Line 1 is standard DM output.  Line 2 is best shown by example:
+        0 1960893648 raid raid4 5 AAAAA 2/490221568
+Here we can see the RAID type is raid4, there are 5 devices - all of
+which are 'A'live, and the array is 2/490221568 complete with recovery.
diff --git a/Documentation/powerpc/dts-bindings/fsl/sata.txt b/Documentation/devicetree/bindings/ata/fsl-sata.txt
index b46bcf46c3d8..b46bcf46c3d8 100644
--- a/Documentation/powerpc/dts-bindings/fsl/sata.txt
+++ b/Documentation/devicetree/bindings/ata/fsl-sata.txt
diff --git a/Documentation/powerpc/dts-bindings/eeprom.txt b/Documentation/devicetree/bindings/eeprom.txt
index 4342c10de1bf..4342c10de1bf 100644
--- a/Documentation/powerpc/dts-bindings/eeprom.txt
+++ b/Documentation/devicetree/bindings/eeprom.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt b/Documentation/devicetree/bindings/gpio/8xxx_gpio.txt
index b0019eb5330e..b0019eb5330e 100644
--- a/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/8xxx_gpio.txt
diff --git a/Documentation/powerpc/dts-bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt
index edaa84d288a1..edaa84d288a1 100644
--- a/Documentation/powerpc/dts-bindings/gpio/gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio.txt
diff --git a/Documentation/powerpc/dts-bindings/gpio/led.txt b/Documentation/devicetree/bindings/gpio/led.txt
index 064db928c3c1..064db928c3c1 100644
--- a/Documentation/powerpc/dts-bindings/gpio/led.txt
+++ b/Documentation/devicetree/bindings/gpio/led.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt
index 1eacd6b20ed5..1eacd6b20ed5 100644
--- a/Documentation/powerpc/dts-bindings/fsl/i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt
diff --git a/Documentation/powerpc/dts-bindings/marvell.txt b/Documentation/devicetree/bindings/marvell.txt
index f1533d91953a..f1533d91953a 100644
--- a/Documentation/powerpc/dts-bindings/marvell.txt
+++ b/Documentation/devicetree/bindings/marvell.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
index 64bcb8be973c..64bcb8be973c 100644
--- a/Documentation/powerpc/dts-bindings/fsl/esdhc.txt
+++ b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
diff --git a/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
index c39ac2891951..c39ac2891951 100644
--- a/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/upm-nand.txt b/Documentation/devicetree/bindings/mtd/fsl-upm-nand.txt
index a48b2cadc7f0..a48b2cadc7f0 100644
--- a/Documentation/powerpc/dts-bindings/fsl/upm-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/fsl-upm-nand.txt
diff --git a/Documentation/powerpc/dts-bindings/mtd-physmap.txt b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt
index 80152cb567d9..80152cb567d9 100644
--- a/Documentation/powerpc/dts-bindings/mtd-physmap.txt
+++ b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/can.txt b/Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt
index 2fa4fcd38fd6..2fa4fcd38fd6 100644
--- a/Documentation/powerpc/dts-bindings/fsl/can.txt
+++ b/Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt
diff --git a/Documentation/powerpc/dts-bindings/can/sja1000.txt b/Documentation/devicetree/bindings/net/can/sja1000.txt
index d6d209ded937..d6d209ded937 100644
--- a/Documentation/powerpc/dts-bindings/can/sja1000.txt
+++ b/Documentation/devicetree/bindings/net/can/sja1000.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/tsec.txt b/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
index edb7ae19e868..edb7ae19e868 100644
--- a/Documentation/powerpc/dts-bindings/fsl/tsec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-tsec-phy.txt
diff --git a/Documentation/powerpc/dts-bindings/gpio/mdio.txt b/Documentation/devicetree/bindings/net/mdio-gpio.txt
index bc9549529014..bc9549529014 100644
--- a/Documentation/powerpc/dts-bindings/gpio/mdio.txt
+++ b/Documentation/devicetree/bindings/net/mdio-gpio.txt
diff --git a/Documentation/powerpc/dts-bindings/phy.txt b/Documentation/devicetree/bindings/net/phy.txt
index bb8c742eb8c5..bb8c742eb8c5 100644
--- a/Documentation/powerpc/dts-bindings/phy.txt
+++ b/Documentation/devicetree/bindings/net/phy.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/83xx-512x-pci.txt b/Documentation/devicetree/bindings/pci/83xx-512x-pci.txt
index 35a465362408..35a465362408 100644
--- a/Documentation/powerpc/dts-bindings/fsl/83xx-512x-pci.txt
+++ b/Documentation/devicetree/bindings/pci/83xx-512x-pci.txt
diff --git a/Documentation/powerpc/dts-bindings/4xx/cpm.txt b/Documentation/devicetree/bindings/powerpc/4xx/cpm.txt
index ee459806d35e..ee459806d35e 100644
--- a/Documentation/powerpc/dts-bindings/4xx/cpm.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/cpm.txt
diff --git a/Documentation/powerpc/dts-bindings/4xx/emac.txt b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
index 2161334a7ca5..2161334a7ca5 100644
--- a/Documentation/powerpc/dts-bindings/4xx/emac.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
diff --git a/Documentation/powerpc/dts-bindings/4xx/ndfc.txt b/Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt
index 869f0b5f16e8..869f0b5f16e8 100644
--- a/Documentation/powerpc/dts-bindings/4xx/ndfc.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt
diff --git a/Documentation/powerpc/dts-bindings/4xx/ppc440spe-adma.txt b/Documentation/devicetree/bindings/powerpc/4xx/ppc440spe-adma.txt
index 515ebcf1b97d..515ebcf1b97d 100644
--- a/Documentation/powerpc/dts-bindings/4xx/ppc440spe-adma.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/ppc440spe-adma.txt
diff --git a/Documentation/powerpc/dts-bindings/4xx/reboot.txt b/Documentation/devicetree/bindings/powerpc/4xx/reboot.txt
index d7217260589c..d7217260589c 100644
--- a/Documentation/powerpc/dts-bindings/4xx/reboot.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/reboot.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/board.txt b/Documentation/devicetree/bindings/powerpc/fsl/board.txt
index 39e941515a36..39e941515a36 100644
--- a/Documentation/powerpc/dts-bindings/fsl/board.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/board.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm.txt
index 160c752484b4..160c752484b4 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/brg.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/brg.txt
index 4c7d45eaf025..4c7d45eaf025 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/brg.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/brg.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/i2c.txt
index 87bc6048667e..87bc6048667e 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/i2c.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/i2c.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/pic.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/pic.txt
index 8e3ee1681618..8e3ee1681618 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/pic.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/pic.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/usb.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/usb.txt
index 74bfda4bb824..74bfda4bb824 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/cpm/usb.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/usb.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/gpio.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/gpio.txt
index 349f79fd7076..349f79fd7076 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/gpio.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/gpio.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/network.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/network.txt
index 0e4269446580..0e4269446580 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/network.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/network.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe.txt
index 4f8930263dd9..4f8930263dd9 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/firmware.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/firmware.txt
index 249db3a15d15..249db3a15d15 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/firmware.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/firmware.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/par_io.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/par_io.txt
index 60984260207b..60984260207b 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/par_io.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/par_io.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/pincfg.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/pincfg.txt
index c5b43061db3a..c5b43061db3a 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/pincfg.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/pincfg.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/ucc.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/ucc.txt
index e47734bee3f0..e47734bee3f0 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/ucc.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/ucc.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/usb.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/usb.txt
index 9ccd5f30405b..9ccd5f30405b 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe/usb.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe/usb.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/serial.txt
index 2ea76d9d137c..2ea76d9d137c 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/serial.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/diu.txt b/Documentation/devicetree/bindings/powerpc/fsl/diu.txt
index b66cb6d31d69..b66cb6d31d69 100644
--- a/Documentation/powerpc/dts-bindings/fsl/diu.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/diu.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/dma.txt b/Documentation/devicetree/bindings/powerpc/fsl/dma.txt
index 2a4b4bce6110..2a4b4bce6110 100644
--- a/Documentation/powerpc/dts-bindings/fsl/dma.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/dma.txt
diff --git a/Documentation/powerpc/dts-bindings/ecm.txt b/Documentation/devicetree/bindings/powerpc/fsl/ecm.txt
index f514f29c67d6..f514f29c67d6 100644
--- a/Documentation/powerpc/dts-bindings/ecm.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/ecm.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/gtm.txt b/Documentation/devicetree/bindings/powerpc/fsl/gtm.txt
index 9a33efded4bc..9a33efded4bc 100644
--- a/Documentation/powerpc/dts-bindings/fsl/gtm.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/gtm.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/guts.txt b/Documentation/devicetree/bindings/powerpc/fsl/guts.txt
index 9e7a2417dac5..9e7a2417dac5 100644
--- a/Documentation/powerpc/dts-bindings/fsl/guts.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/guts.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/lbc.txt b/Documentation/devicetree/bindings/powerpc/fsl/lbc.txt
index 3300fec501c5..3300fec501c5 100644
--- a/Documentation/powerpc/dts-bindings/fsl/lbc.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/lbc.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/mcm.txt b/Documentation/devicetree/bindings/powerpc/fsl/mcm.txt
index 4ceda9b3b413..4ceda9b3b413 100644
--- a/Documentation/powerpc/dts-bindings/fsl/mcm.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mcm.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/mcu-mpc8349emitx.txt b/Documentation/devicetree/bindings/powerpc/fsl/mcu-mpc8349emitx.txt
index 0f766333b6eb..0f766333b6eb 100644
--- a/Documentation/powerpc/dts-bindings/fsl/mcu-mpc8349emitx.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mcu-mpc8349emitx.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/mpc5121-psc.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpc5121-psc.txt
index 8832e8798912..8832e8798912 100644
--- a/Documentation/powerpc/dts-bindings/fsl/mpc5121-psc.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mpc5121-psc.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpc5200.txt
index 4ccb2cd5df94..4ccb2cd5df94 100644
--- a/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mpc5200.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/mpic.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
index 71e39cf3215b..71e39cf3215b 100644
--- a/Documentation/powerpc/dts-bindings/fsl/mpic.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/msi-pic.txt b/Documentation/devicetree/bindings/powerpc/fsl/msi-pic.txt
index bcc30bac6831..bcc30bac6831 100644
--- a/Documentation/powerpc/dts-bindings/fsl/msi-pic.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/msi-pic.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/pmc.txt b/Documentation/devicetree/bindings/powerpc/fsl/pmc.txt
index 07256b7ffcaa..07256b7ffcaa 100644
--- a/Documentation/powerpc/dts-bindings/fsl/pmc.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/pmc.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/sec.txt b/Documentation/devicetree/bindings/powerpc/fsl/sec.txt
index 2b6f2d45c45a..2b6f2d45c45a 100644
--- a/Documentation/powerpc/dts-bindings/fsl/sec.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/sec.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/ssi.txt b/Documentation/devicetree/bindings/powerpc/fsl/ssi.txt
index 5ff76c9c57d2..5ff76c9c57d2 100644
--- a/Documentation/powerpc/dts-bindings/fsl/ssi.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/ssi.txt
diff --git a/Documentation/powerpc/dts-bindings/nintendo/gamecube.txt b/Documentation/devicetree/bindings/powerpc/nintendo/gamecube.txt
index b558585b1aaf..b558585b1aaf 100644
--- a/Documentation/powerpc/dts-bindings/nintendo/gamecube.txt
+++ b/Documentation/devicetree/bindings/powerpc/nintendo/gamecube.txt
diff --git a/Documentation/powerpc/dts-bindings/nintendo/wii.txt b/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt
index a7e155a023b8..a7e155a023b8 100644
--- a/Documentation/powerpc/dts-bindings/nintendo/wii.txt
+++ b/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/spi.txt b/Documentation/devicetree/bindings/spi/fsl-spi.txt
index 777abd7399d5..777abd7399d5 100644
--- a/Documentation/powerpc/dts-bindings/fsl/spi.txt
+++ b/Documentation/devicetree/bindings/spi/fsl-spi.txt
diff --git a/Documentation/powerpc/dts-bindings/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt
index e782add2e457..e782add2e457 100644
--- a/Documentation/powerpc/dts-bindings/spi-bus.txt
+++ b/Documentation/devicetree/bindings/spi/spi-bus.txt
diff --git a/Documentation/powerpc/dts-bindings/fsl/usb.txt b/Documentation/devicetree/bindings/usb/fsl-usb.txt
index bd5723f0b67e..bd5723f0b67e 100644
--- a/Documentation/powerpc/dts-bindings/fsl/usb.txt
+++ b/Documentation/devicetree/bindings/usb/fsl-usb.txt
diff --git a/Documentation/powerpc/dts-bindings/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index fa18612f757b..fa18612f757b 100644
--- a/Documentation/powerpc/dts-bindings/usb-ehci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
diff --git a/Documentation/powerpc/dts-bindings/xilinx.txt b/Documentation/devicetree/bindings/xilinx.txt
index 299d0923537b..299d0923537b 100644
--- a/Documentation/powerpc/dts-bindings/xilinx.txt
+++ b/Documentation/devicetree/bindings/xilinx.txt
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/devicetree/booting-without-of.txt
index 7400d7555dc3..9381a1481027 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/devicetree/booting-without-of.txt
@@ -13,7 +13,7 @@ Table of Contents
 
   I - Introduction
     1) Entry point for arch/powerpc
-    2) Board support
+    2) Entry point for arch/arm
 
   II - The DT block format
     1) Header
@@ -41,13 +41,6 @@ Table of Contents
   VI - System-on-a-chip devices and nodes
     1) Defining child nodes of an SOC
     2) Representing devices without a current OF specification
-      a) PHY nodes
-      b) Interrupt controllers
-      c) 4xx/Axon EMAC ethernet nodes
-      d) Xilinx IP cores
-      e) USB EHCI controllers
-      f) MDIO on GPIOs
-      g) SPI busses
 
   VII - Specifying interrupt information for devices
     1) interrupts property
@@ -123,7 +116,7 @@ Revision Information
 I - Introduction
 ================
 
-During the recent development of the Linux/ppc64 kernel, and more
+During the development of the Linux/ppc64 kernel, and more
 specifically, the addition of new platform types outside of the old
 IBM pSeries/iSeries pair, it was decided to enforce some strict rules
 regarding the kernel entry and bootloader <-> kernel interfaces, in
@@ -146,7 +139,7 @@ section III, but, for example, the kernel does not require you to
 create a node for every PCI device in the system. It is a requirement
 to have a node for PCI host bridges in order to provide interrupt
 routing informations and memory/IO ranges, among others. It is also
-recommended to define nodes for on chip devices and other busses that
+recommended to define nodes for on chip devices and other buses that
 don't specifically fit in an existing OF specification. This creates a
 great flexibility in the way the kernel can then probe those and match
 drivers to device, without having to hard code all sorts of tables. It
@@ -158,7 +151,7 @@ it with special cases.
 1) Entry point for arch/powerpc
 -------------------------------
 
-   There is one and one single entry point to the kernel, at the start
+   There is one single entry point to the kernel, at the start
    of the kernel image. That entry point supports two calling
    conventions:
 
@@ -210,12 +203,6 @@ it with special cases.
         with all CPUs. The way to do that with method b) will be
         described in a later revision of this document.
 
-
-2) Board support
-----------------
-
-64-bit kernels:
-
    Board supports (platforms) are not exclusive config options. An
    arbitrary set of board supports can be built in a single kernel
    image. The kernel will "know" what set of functions to use for a
@@ -234,47 +221,49 @@ it with special cases.
         containing the various callbacks that the generic code will
         use to get to your platform specific code
 
-        c) Add a reference to your "ppc_md" structure in the
-        "machines" table in arch/powerpc/kernel/setup_64.c if you are
-        a 64-bit platform.
-
-        d) request and get assigned a platform number (see PLATFORM_*
-        constants in arch/powerpc/include/asm/processor.h
-
-32-bit embedded kernels:
-
-  Currently, board support is essentially an exclusive config option.
-  The kernel is configured for a single platform.  Part of the reason
-  for this is to keep kernels on embedded systems small and efficient;
-  part of this is due to the fact the code is already that way. In the
-  future, a kernel may support multiple platforms, but only if the
+  A kernel image may support multiple platforms, but only if the
   platforms feature the same core architecture.  A single kernel build
   cannot support both configurations with Book E and configurations
   with classic Powerpc architectures.
 
-  32-bit embedded platforms that are moved into arch/powerpc using a
-  flattened device tree should adopt the merged tree practice of
-  setting ppc_md up dynamically, even though the kernel is currently
-  built with support for only a single platform at a time.  This allows
-  unification of the setup code, and will make it easier to go to a
-  multiple-platform-support model in the future.
+2) Entry point for arch/arm
+---------------------------
+
+   There is one single entry point to the kernel, at the start
+   of the kernel image. That entry point supports two calling
+   conventions.  A summary of the interface is described here.  A full
+   description of the boot requirements is documented in
+   Documentation/arm/Booting
+
+        a) ATAGS interface.  Minimal information is passed from firmware
+        to the kernel with a tagged list of predefined parameters.
+
+                r0 : 0
+
+                r1 : Machine type number
 
-NOTE: I believe the above will be true once Ben's done with the merge
-of the boot sequences.... someone speak up if this is wrong!
+                r2 : Physical address of tagged list in system RAM
 
-  To add a 32-bit embedded platform support, follow the instructions
-  for 64-bit platforms above, with the exception that the Kconfig
-  option should be set up such that the kernel builds exclusively for
-  the platform selected.  The processor type for the platform should
-  enable another config option to select the specific board
-  supported.
+        b) Entry with a flattened device-tree block.  Firmware loads the
+        physical address of the flattened device tree block (dtb) into r2,
+        r1 is not used, but it is considered good practise to use a valid
+        machine number as described in Documentation/arm/Booting.
 
-NOTE: If Ben doesn't merge the setup files, may need to change this to
-point to setup_32.c
+                r0 : 0
 
+                r1 : Valid machine type number.  When using a device tree,
+                a single machine type number will often be assigned to
+                represent a class or family of SoCs.
 
-   I will describe later the boot process and various callbacks that
-   your platform should implement.
+                r2 : physical pointer to the device-tree block
+                (defined in chapter II) in RAM.  Device tree can be located
+                anywhere in system RAM, but it should be aligned on a 32 bit
+                boundary.
+
+   The kernel will differentiate between ATAGS and device tree booting by
+   reading the memory pointed to by r1 and looking for either the flattened
+   device tree block magic value (0xd00dfeed) or the ATAG_CORE value at
+   offset 0x4 from r2 (0x54410001).
 
 
 II - The DT block format
@@ -300,8 +289,8 @@ the block to RAM before passing it to the kernel.
 1) Header
 ---------
 
-   The kernel is entered with r3 pointing to an area of memory that is
-   roughly described in arch/powerpc/include/asm/prom.h by the structure
+   The kernel is passed the physical address pointing to an area of memory
+   that is roughly described in include/linux/of_fdt.h by the structure
    boot_param_header:
 
 struct boot_param_header {
@@ -339,7 +328,7 @@ struct boot_param_header {
    All values in this header are in big endian format, the various
    fields in this header are defined more precisely below. All
    "offset" values are in bytes from the start of the header; that is
-   from the value of r3.
+   from the physical base address of the device tree block.
 
    - magic
 
@@ -437,7 +426,7 @@ struct boot_param_header {
 
 
              ------------------------------
-       r3 -> |  struct boot_param_header  |
+     base -> |  struct boot_param_header  |
              ------------------------------
              |      (alignment gap) (*)   |
              ------------------------------
@@ -457,7 +446,7 @@ struct boot_param_header {
       -----> ------------------------------
       |
       |
-      --- (r3 + totalsize)
+      --- (base + totalsize)
 
   (*) The alignment gaps are not necessarily present; their presence
       and size are dependent on the various alignment requirements of
@@ -500,7 +489,7 @@ the device-tree structure. It is typically used to represent "path" in
 the device-tree. More details about the actual format of these will be
 below.
 
-The kernel powerpc generic code does not make any formal use of the
+The kernel generic code does not make any formal use of the
 unit address (though some board support code may do) so the only real
 requirement here for the unit address is to ensure uniqueness of
 the node unit name at a given level of the tree. Nodes with no notion
@@ -518,20 +507,21 @@ path to the root node is "/".
 
 Every node which actually represents an actual device (that is, a node
 which isn't only a virtual "container" for more nodes, like "/cpus"
-is) is also required to have a "device_type" property indicating the
-type of node .
+is) is also required to have a "compatible" property indicating the
+specific hardware and an optional list of devices it is fully
+backwards compatible with.
 
 Finally, every node that can be referenced from a property in another
-node is required to have a "linux,phandle" property. Real open
-firmware implementations provide a unique "phandle" value for every
-node that the "prom_init()" trampoline code turns into
-"linux,phandle" properties. However, this is made optional if the
-flattened device tree is used directly. An example of a node
+node is required to have either a "phandle" or a "linux,phandle"
+property. Real Open Firmware implementations provide a unique
+"phandle" value for every node that the "prom_init()" trampoline code
+turns into "linux,phandle" properties. However, this is made optional
+if the flattened device tree is used directly. An example of a node
 referencing another node via "phandle" is when laying out the
 interrupt tree which will be described in a further version of this
 document.
 
-This "linux, phandle" property is a 32-bit value that uniquely
+The "phandle" property is a 32-bit value that uniquely
 identifies a node. You are free to use whatever values or system of
 values, internal pointers, or whatever to generate these, the only
 requirement is that every node for which you provide that property has
@@ -694,7 +684,7 @@ made of 3 cells, the bottom two containing the actual address itself
 while the top cell contains address space indication, flags, and pci
 bus & device numbers.
 
-For busses that support dynamic allocation, it's the accepted practice
+For buses that support dynamic allocation, it's the accepted practice
 to then not provide the address in "reg" (keep it 0) though while
 providing a flag indicating the address is dynamically allocated, and
 then, to provide a separate "assigned-addresses" property that
@@ -711,7 +701,7 @@ prom_parse.c file of the recent kernels for your bus type.
 The "reg" property only defines addresses and sizes (if #size-cells is
 non-0) within a given bus. In order to translate addresses upward
 (that is into parent bus addresses, and possibly into CPU physical
-addresses), all busses must contain a "ranges" property. If the
+addresses), all buses must contain a "ranges" property. If the
 "ranges" property is missing at a given level, it's assumed that
 translation isn't possible, i.e., the registers are not visible on the
 parent bus.  The format of the "ranges" property for a bus is a list
@@ -727,9 +717,9 @@ example, for a PCI host controller, that would be a CPU address. For a
 PCI<->ISA bridge, that would be a PCI address. It defines the base
 address in the parent bus where the beginning of that range is mapped.
 
-For a new 64-bit powerpc board, I recommend either the 2/2 format or
+For new 64-bit board support, I recommend either the 2/2 format or
 Apple's 2/1 format which is slightly more compact since sizes usually
-fit in a single 32-bit word.   New 32-bit powerpc boards should use a
+fit in a single 32-bit word.   New 32-bit board support should use a
 1/1 format, unless the processor supports physical addresses greater
 than 32-bits, in which case a 2/1 format is recommended.
 
@@ -754,7 +744,7 @@ of their actual names.
 While earlier users of Open Firmware like OldWorld macintoshes tended
 to use the actual device name for the "name" property, it's nowadays
 considered a good practice to use a name that is closer to the device
-class (often equal to device_type). For example, nowadays, ethernet
+class (often equal to device_type). For example, nowadays, Ethernet
 controllers are named "ethernet", an additional "model" property
 defining precisely the chip type/model, and "compatible" property
 defining the family in case a single driver can driver more than one
@@ -772,7 +762,7 @@ is present).
 4) Note about node and property names and character set
 -------------------------------------------------------
 
-While open firmware provides more flexible usage of 8859-1, this
+While Open Firmware provides more flexible usage of 8859-1, this
 specification enforces more strict rules. Nodes and properties should
 be comprised only of ASCII characters 'a' to 'z', '0' to
 '9', ',', '.', '_', '+', '#', '?', and '-'. Node names additionally
@@ -792,7 +782,7 @@ address which can extend beyond that limit.
 --------------------------------
   These are all that are currently required. However, it is strongly
   recommended that you expose PCI host bridges as documented in the
-  PCI binding to open firmware, and your interrupt tree as documented
+  PCI binding to Open Firmware, and your interrupt tree as documented
   in OF interrupt tree specification.
 
   a) The root node
@@ -802,20 +792,12 @@ address which can extend beyond that limit.
     - model : this is your board name/model
     - #address-cells : address representation for "root" devices
     - #size-cells: the size representation for "root" devices
-    - device_type : This property shouldn't be necessary. However, if
-      you decide to create a device_type for your root node, make sure it
-      is _not_ "chrp" unless your platform is a pSeries or PAPR compliant
-      one for 64-bit, or a CHRP-type machine for 32-bit as this will
-      matched by the kernel this way.
-
-  Additionally, some recommended properties are:
-
     - compatible : the board "family" generally finds its way here,
       for example, if you have 2 board models with a similar layout,
       that typically get driven by the same platform code in the
-      kernel, you would use a different "model" property but put a
-      value in "compatible". The kernel doesn't directly use that
-      value but it is generally useful.
+      kernel, you would specify the exact board model in the
+      compatible property followed by an entry that represents the SoC
+      model.
 
   The root node is also generally where you add additional properties
   specific to your board like the serial number if any, that sort of
@@ -841,8 +823,11 @@ address which can extend beyond that limit.
 
   So under /cpus, you are supposed to create a node for every CPU on
   the machine. There is no specific restriction on the name of the
-  CPU, though It's common practice to call it PowerPC,<name>. For
+  CPU, though it's common to call it <architecture>,<core>. For
   example, Apple uses PowerPC,G5 while IBM uses PowerPC,970FX.
+  However, the Generic Names convention suggests that it would be
+  better to simply use 'cpu' for each cpu node and use the compatible
+  property to identify the specific cpu core.
 
   Required properties:
 
@@ -923,7 +908,7 @@ compatibility.
 
   e) The /chosen node
 
-  This node is a bit "special". Normally, that's where open firmware
+  This node is a bit "special". Normally, that's where Open Firmware
   puts some variable environment information, like the arguments, or
   the default input/output devices.
 
@@ -940,11 +925,7 @@ compatibility.
       console device if any. Typically, if you have serial devices on
       your board, you may want to put the full path to the one set as
       the default console in the firmware here, for the kernel to pick
-      it up as its own default console. If you look at the function
-      set_preferred_console() in arch/ppc64/kernel/setup.c, you'll see
-      that the kernel tries to find out the default console and has
-      knowledge of various types like 8250 serial ports. You may want
-      to extend this function to add your own.
+      it up as its own default console.
 
   Note that u-boot creates and fills in the chosen node for platforms
   that use it.
@@ -955,23 +936,23 @@ compatibility.
 
   f) the /soc<SOCname> node
 
-  This node is used to represent a system-on-a-chip (SOC) and must be
-  present if the processor is a SOC. The top-level soc node contains
-  information that is global to all devices on the SOC. The node name
-  should contain a unit address for the SOC, which is the base address
-  of the memory-mapped register set for the SOC. The name of an soc
+  This node is used to represent a system-on-a-chip (SoC) and must be
+  present if the processor is a SoC. The top-level soc node contains
+  information that is global to all devices on the SoC. The node name
+  should contain a unit address for the SoC, which is the base address
+  of the memory-mapped register set for the SoC. The name of an SoC
   node should start with "soc", and the remainder of the name should
   represent the part number for the soc.  For example, the MPC8540's
   soc node would be called "soc8540".
 
   Required properties:
 
-    - device_type : Should be "soc"
     - ranges : Should be defined as specified in 1) to describe the
-      translation of SOC addresses for memory mapped SOC registers.
-    - bus-frequency: Contains the bus frequency for the SOC node.
+      translation of SoC addresses for memory mapped SoC registers.
+    - bus-frequency: Contains the bus frequency for the SoC node.
       Typically, the value of this field is filled in by the boot
       loader.
+    - compatible : Exact model of the SoC
 
 
   Recommended properties:
@@ -1155,12 +1136,13 @@ while all this has been defined and implemented.
 
   - An example of code for iterating nodes & retrieving properties
     directly from the flattened tree format can be found in the kernel
-    file arch/ppc64/kernel/prom.c, look at scan_flat_dt() function,
+    file drivers/of/fdt.c.  Look at the of_scan_flat_dt() function,
     its usage in early_init_devtree(), and the corresponding various
     early_init_dt_scan_*() callbacks. That code can be re-used in a
     GPL bootloader, and as the author of that code, I would be happy
     to discuss possible free licensing to any vendor who wishes to
     integrate all or part of this code into a non-GPL bootloader.
+    (reference needed; who is 'I' here? ---gcl Jan 31, 2011)
 
 
 
@@ -1203,18 +1185,19 @@ MPC8540.
 2) Representing devices without a current OF specification
 ----------------------------------------------------------
 
-Currently, there are many devices on SOCs that do not have a standard
-representation pre-defined as part of the open firmware
-specifications, mainly because the boards that contain these SOCs are
-not currently booted using open firmware.   This section contains
-descriptions for the SOC devices for which new nodes have been
-defined; this list will expand as more and more SOC-containing
-platforms are moved over to use the flattened-device-tree model.
+Currently, there are many devices on SoCs that do not have a standard
+representation defined as part of the Open Firmware specifications,
+mainly because the boards that contain these SoCs are not currently
+booted using Open Firmware.  Binding documentation for new devices
+should be added to the Documentation/devicetree/bindings directory.
+That directory will expand as device tree support is added to more and
+more SoCs.
+
 
 VII - Specifying interrupt information for devices
 ===================================================
 
-The device tree represents the busses and devices of a hardware
+The device tree represents the buses and devices of a hardware
 system in a form similar to the physical bus topology of the
 hardware.
 
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 6cbbd20534cf..b3f35e5f9c95 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -248,6 +248,17 @@ Who:	Zhang Rui <rui.zhang@intel.com>
 
 ---------------------------
 
+What:	CONFIG_ACPI_PROCFS_POWER
+When:	2.6.39
+Why:	sysfs I/F for ACPI power devices, including AC and Battery,
+        has been working in upstream kenrel since 2.6.24, Sep 2007.
+	In 2.6.37, we make the sysfs I/F always built in and this option
+	disabled by default.
+	Remove this option and the ACPI power procfs interface in 2.6.39.
+Who:	Zhang Rui <rui.zhang@intel.com>
+
+---------------------------
+
 What:	/proc/acpi/button
 When:	August 2007
 Why:	/proc/acpi/button has been replaced by events to the input layer
@@ -346,14 +357,6 @@ Who:	Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>
 
 -----------------------------
 
-What:	__do_IRQ all in one fits nothing interrupt handler
-When:	2.6.32
-Why:	__do_IRQ was kept for easy migration to the type flow handlers.
-	More than two years of migration time is enough.
-Who:	Thomas Gleixner <tglx@linutronix.de>
-
------------------------------
-
 What:	fakephp and associated sysfs files in /sys/bus/pci/slots/
 When:	2011
 Why:	In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
@@ -600,3 +603,19 @@ Why:	The adm9240, w83792d and w83793 hardware monitoring drivers have
 Who:	Jean Delvare <khali@linux-fr.org>
 
 ----------------------------
+
+What:	noswapaccount kernel command line parameter
+When:	2.6.40
+Why:	The original implementation of memsw feature enabled by
+	CONFIG_CGROUP_MEM_RES_CTLR_SWAP could be disabled by the noswapaccount
+	kernel parameter (introduced in 2.6.29-rc1). Later on, this decision
+	turned out to be not ideal because we cannot have the feature compiled
+	in and disabled by default and let only interested to enable it
+	(e.g. general distribution kernels might need it). Therefore we have
+	added swapaccount[=0|1] parameter (introduced in 2.6.37) which provides
+	the both possibilities. If we remove noswapaccount we will have
+	less command line parameters with the same functionality and we
+	can also cleanup the parameter handling a bit ().
+Who:	Michal Hocko <mhocko@suse.cz>
+
+----------------------------
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 977d8919cc69..4471a416c274 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -19,6 +19,8 @@ prototypes:
 	void (*d_release)(struct dentry *);
 	void (*d_iput)(struct dentry *, struct inode *);
 	char *(*d_dname)((struct dentry *dentry, char *buffer, int buflen);
+	struct vfsmount *(*d_automount)(struct path *path);
+	int (*d_manage)(struct dentry *, bool);
 
 locking rules:
 		rename_lock	->d_lock	may block	rcu-walk
@@ -29,6 +31,8 @@ d_delete:	no		yes		no		no
 d_release:	no		no		yes		no
 d_iput:		no		no		yes		no
 d_dname:	no		no		no		no
+d_automount:	no		no		yes		no
+d_manage:	no		no		yes (ref-walk)	maybe
 
 --------------------------- inode_operations --------------------------- 
 prototypes:
@@ -56,7 +60,6 @@ ata *);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*removexattr) (struct dentry *, const char *);
 	void (*truncate_range)(struct inode *, loff_t, loff_t);
-	long (*fallocate)(struct inode *inode, int mode, loff_t offset, loff_t len);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
 
 locking rules:
@@ -84,7 +87,6 @@ getxattr:	no
 listxattr:	no
 removexattr:	yes
 truncate_range:	yes
-fallocate:	no
 fiemap:		no
 	Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
@@ -343,7 +345,6 @@ prototypes:
 	int (*fl_grant)(struct file_lock *, struct file_lock *, int);
 	void (*fl_release_private)(struct file_lock *);
 	void (*fl_break)(struct file_lock *); /* break_lease callback */
-	int (*fl_mylease)(struct file_lock *, struct file_lock *);
 	int (*fl_change)(struct file_lock **, int);
 
 locking rules:
@@ -353,7 +354,6 @@ fl_notify:		yes		no
 fl_grant:		no		no
 fl_release_private:	maybe		no
 fl_break:		yes		no
-fl_mylease:		yes		no
 fl_change		yes		no
 
 --------------------------- buffer_head -----------------------------------
@@ -435,6 +435,7 @@ prototypes:
 	ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *,
 			size_t, unsigned int);
 	int (*setlease)(struct file *, long, struct file_lock **);
+	long (*fallocate)(struct file *, int, loff_t, loff_t);
 };
 
 locking rules:
diff --git a/Documentation/filesystems/ntfs.txt b/Documentation/filesystems/ntfs.txt
index 6ef8cf3bc9a3..933bc66ccff1 100644
--- a/Documentation/filesystems/ntfs.txt
+++ b/Documentation/filesystems/ntfs.txt
@@ -460,6 +460,8 @@ Note, a technical ChangeLog aimed at kernel hackers is in fs/ntfs/ChangeLog.
 2.1.30:
 	- Fix writev() (it kept writing the first segment over and over again
 	  instead of moving onto subsequent segments).
+	- Fix crash in ntfs_mft_record_alloc() when mapping the new extent mft
+	  record failed.
 2.1.29:
 	- Fix a deadlock when mounting read-write.
 2.1.28:
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 266d2059b9b8..dfbcd1b00b0a 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -365,8 +365,8 @@ must be done in the RCU callback.
 [recommended]
 	vfs now tries to do path walking in "rcu-walk mode", which avoids
 atomic operations and scalability hazards on dentries and inodes (see
-Documentation/filesystems/path-walk.txt). d_hash and d_compare changes (above)
-are examples of the changes required to support this. For more complex
+Documentation/filesystems/path-lookup.txt). d_hash and d_compare changes
+(above) are examples of the changes required to support this. For more complex
 filesystem callbacks, the vfs drops out of rcu-walk mode before the fs call, so
 no changes are required to the filesystem. However, this is costly and loses
 the benefits of rcu-walk mode. We will begin to add filesystem callbacks that
@@ -383,8 +383,8 @@ Documentation/filesystems/vfs.txt for more details.
 
 	permission and check_acl are inode permission checks that are called
 on many or all directory inodes on the way down a path walk (to check for
-exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See
-Documentation/filesystems/vfs.txt for more details.
+exec permission). These must now be rcu-walk aware (flags & IPERM_FLAG_RCU).
+See Documentation/filesystems/vfs.txt for more details.
  
 --
 [mandatory]
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 9471225212c4..23cae6548d3a 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -375,6 +375,7 @@ Anonymous:             0 kB
 Swap:                  0 kB
 KernelPageSize:        4 kB
 MMUPageSize:           4 kB
+Locked:              374 kB
 
 The first of these lines shows the same information as is displayed for the
 mapping in /proc/PID/maps.  The remaining lines show the size of the mapping
@@ -670,6 +671,8 @@ varies by architecture and compile options.  The following is from a
 
 > cat /proc/meminfo
 
+The "Locked" indicates whether the mapping is locked in memory or not.
+
 
 MemTotal:     16344972 kB
 MemFree:      13634064 kB
@@ -1320,6 +1323,10 @@ scaled linearly with /proc/<pid>/oom_score_adj.
 Writing to /proc/<pid>/oom_score_adj or /proc/<pid>/oom_adj will change the
 other with its scaled value.
 
+The value of /proc/<pid>/oom_score_adj may be reduced no lower than the last
+value set by a CAP_SYS_RESOURCE process. To reduce the value any lower
+requires CAP_SYS_RESOURCE.
+
 NOTICE: /proc/<pid>/oom_adj is deprecated and will be removed, please see
 Documentation/feature-removal-schedule.txt.
 
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index fbb324e2bd43..94cf97b901d7 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -415,8 +415,8 @@ otherwise noted.
   permission: called by the VFS to check for access rights on a POSIX-like
   	filesystem.
 
-	May be called in rcu-walk mode (flags & IPERM_RCU). If in rcu-walk
-	mode, the filesystem must check the permission without blocking or
+	May be called in rcu-walk mode (flags & IPERM_FLAG_RCU). If in rcu-walk
+        mode, the filesystem must check the permission without blocking or
 	storing to the inode.
 
 	If a situation is encountered that rcu-walk cannot handle, return
@@ -864,6 +864,8 @@ struct dentry_operations {
 	void (*d_release)(struct dentry *);
 	void (*d_iput)(struct dentry *, struct inode *);
 	char *(*d_dname)(struct dentry *, char *, int);
+	struct vfsmount *(*d_automount)(struct path *);
+	int (*d_manage)(struct dentry *, bool, bool);
 };
 
   d_revalidate: called when the VFS needs to revalidate a dentry. This
@@ -930,6 +932,47 @@ struct dentry_operations {
 	at the end of the buffer, and returns a pointer to the first char.
 	dynamic_dname() helper function is provided to take care of this.
 
+  d_automount: called when an automount dentry is to be traversed (optional).
+	This should create a new VFS mount record and return the record to the
+	caller.  The caller is supplied with a path parameter giving the
+	automount directory to describe the automount target and the parent
+	VFS mount record to provide inheritable mount parameters.  NULL should
+	be returned if someone else managed to make the automount first.  If
+	the vfsmount creation failed, then an error code should be returned.
+	If -EISDIR is returned, then the directory will be treated as an
+	ordinary directory and returned to pathwalk to continue walking.
+
+	If a vfsmount is returned, the caller will attempt to mount it on the
+	mountpoint and will remove the vfsmount from its expiration list in
+	the case of failure.  The vfsmount should be returned with 2 refs on
+	it to prevent automatic expiration - the caller will clean up the
+	additional ref.
+
+	This function is only used if DCACHE_NEED_AUTOMOUNT is set on the
+	dentry.  This is set by __d_instantiate() if S_AUTOMOUNT is set on the
+	inode being added.
+
+  d_manage: called to allow the filesystem to manage the transition from a
+	dentry (optional).  This allows autofs, for example, to hold up clients
+	waiting to explore behind a 'mountpoint' whilst letting the daemon go
+	past and construct the subtree there.  0 should be returned to let the
+	calling process continue.  -EISDIR can be returned to tell pathwalk to
+	use this directory as an ordinary directory and to ignore anything
+	mounted on it and not to check the automount flag.  Any other error
+	code will abort pathwalk completely.
+
+	If the 'mounting_here' parameter is true, then namespace_sem is being
+	held by the caller and the function should not initiate any mounts or
+	unmounts that it will then wait for.
+
+	If the 'rcu_walk' parameter is true, then the caller is doing a
+	pathwalk in RCU-walk mode.  Sleeping is not permitted in this mode,
+	and the caller can be asked to leave it and call again by returing
+	-ECHILD.
+
+	This function is only used if DCACHE_MANAGE_TRANSIT is set on the
+	dentry being transited from.
+
 Example :
 
 static char *pipefs_dname(struct dentry *dent, char *buffer, int buflen)
diff --git a/Documentation/gpio.txt b/Documentation/gpio.txt
index a492d92bb098..792faa3c06cf 100644
--- a/Documentation/gpio.txt
+++ b/Documentation/gpio.txt
@@ -135,7 +135,7 @@ setting up a platform_device using the GPIO, is mark its direction:
 	int gpio_direction_input(unsigned gpio);
 	int gpio_direction_output(unsigned gpio, int value);
 
-The return value is zero for success, else a negative errno.  It must
+The return value is zero for success, else a negative errno.  It should
 be checked, since the get/set calls don't have error returns and since
 misconfiguration is possible.  You should normally issue these calls from
 a task context.  However, for spinlock-safe GPIOs it's OK to use them
diff --git a/Documentation/hwmon/lm93 b/Documentation/hwmon/lm93
index 7a10616d0b44..f3b2ad2ceb01 100644
--- a/Documentation/hwmon/lm93
+++ b/Documentation/hwmon/lm93
@@ -6,6 +6,10 @@ Supported chips:
     Prefix 'lm93'
     Addresses scanned: I2C 0x2c-0x2e
     Datasheet: http://www.national.com/ds.cgi/LM/LM93.pdf
+  * National Semiconductor LM94
+    Prefix 'lm94'
+    Addresses scanned: I2C 0x2c-0x2e
+    Datasheet: http://www.national.com/ds.cgi/LM/LM94.pdf
 
 Authors:
 	Mark M. Hoffman <mhoffman@lightlink.com>
@@ -56,6 +60,9 @@ previous motherboard management ASICs and uses some of the LM85's features
 for dynamic Vccp monitoring and PROCHOT. It is designed to monitor a dual
 processor Xeon class motherboard with a minimum of external components.
 
+LM94 is also supported in LM93 compatible mode. Extra sensors and features of
+LM94 are not supported.
+
 
 User Interface
 --------------
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 55fe7599bc8e..89835a4766a6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -43,11 +43,11 @@ parameter is applicable:
 	AVR32	AVR32 architecture is enabled.
 	AX25	Appropriate AX.25 support is enabled.
 	BLACKFIN Blackfin architecture is enabled.
+	DRM	Direct Rendering Management support is enabled.
+	DYNAMIC_DEBUG Build in debug messages and enable them at runtime
 	EDD	BIOS Enhanced Disk Drive Services (EDD) is enabled
 	EFI	EFI Partitioning (GPT) is enabled
 	EIDE	EIDE/ATAPI support is enabled.
-	DRM	Direct Rendering Management support is enabled.
-	DYNAMIC_DEBUG Build in debug messages and enable them at runtime
 	FB	The frame buffer device is enabled.
 	GCOV	GCOV profiling is enabled.
 	HW	Appropriate hardware is enabled.
@@ -199,11 +199,6 @@ and is between 256 and 4096 characters. It is defined in the file
 			unusable.  The "log_buf_len" parameter may be useful
 			if you need to capture more output.
 
-	acpi_display_output=	[HW,ACPI]
-			acpi_display_output=vendor
-			acpi_display_output=video
-			See above.
-
 	acpi_irq_balance [HW,ACPI]
 			ACPI will balance active IRQs
 			default in APIC mode
diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c
index dc73bc54cc4e..d9da7e148538 100644
--- a/Documentation/lguest/lguest.c
+++ b/Documentation/lguest/lguest.c
@@ -39,6 +39,9 @@
 #include <limits.h>
 #include <stddef.h>
 #include <signal.h>
+#include <pwd.h>
+#include <grp.h>
+
 #include <linux/virtio_config.h>
 #include <linux/virtio_net.h>
 #include <linux/virtio_blk.h>
@@ -298,20 +301,27 @@ static void *map_zeroed_pages(unsigned int num)
 
 	/*
 	 * We use a private mapping (ie. if we write to the page, it will be
-	 * copied).
+	 * copied). We allocate an extra two pages PROT_NONE to act as guard
+	 * pages against read/write attempts that exceed allocated space.
 	 */
-	addr = mmap(NULL, getpagesize() * num,
-		    PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, fd, 0);
+	addr = mmap(NULL, getpagesize() * (num+2),
+		    PROT_NONE, MAP_PRIVATE, fd, 0);
+
 	if (addr == MAP_FAILED)
 		err(1, "Mmapping %u pages of /dev/zero", num);
 
+	if (mprotect(addr + getpagesize(), getpagesize() * num,
+		     PROT_READ|PROT_WRITE) == -1)
+		err(1, "mprotect rw %u pages failed", num);
+
 	/*
 	 * One neat mmap feature is that you can close the fd, and it
 	 * stays mapped.
 	 */
 	close(fd);
 
-	return addr;
+	/* Return address after PROT_NONE page */
+	return addr + getpagesize();
 }
 
 /* Get some more pages for a device. */
@@ -343,7 +353,7 @@ static void map_at(int fd, void *addr, unsigned long offset, unsigned long len)
 	 * done to it.  This allows us to share untouched memory between
 	 * Guests.
 	 */
-	if (mmap(addr, len, PROT_READ|PROT_WRITE|PROT_EXEC,
+	if (mmap(addr, len, PROT_READ|PROT_WRITE,
 		 MAP_FIXED|MAP_PRIVATE, fd, offset) != MAP_FAILED)
 		return;
 
@@ -573,10 +583,10 @@ static void *_check_pointer(unsigned long addr, unsigned int size,
 			    unsigned int line)
 {
 	/*
-	 * We have to separately check addr and addr+size, because size could
-	 * be huge and addr + size might wrap around.
+	 * Check if the requested address and size exceeds the allocated memory,
+	 * or addr + size wraps around.
 	 */
-	if (addr >= guest_limit || addr + size >= guest_limit)
+	if ((addr + size) > guest_limit || (addr + size) < addr)
 		errx(1, "%s:%i: Invalid address %#lx", __FILE__, line, addr);
 	/*
 	 * We return a pointer for the caller's convenience, now we know it's
@@ -1872,6 +1882,8 @@ static struct option opts[] = {
 	{ "block", 1, NULL, 'b' },
 	{ "rng", 0, NULL, 'r' },
 	{ "initrd", 1, NULL, 'i' },
+	{ "username", 1, NULL, 'u' },
+	{ "chroot", 1, NULL, 'c' },
 	{ NULL },
 };
 static void usage(void)
@@ -1894,6 +1906,12 @@ int main(int argc, char *argv[])
 	/* If they specify an initrd file to load. */
 	const char *initrd_name = NULL;
 
+	/* Password structure for initgroups/setres[gu]id */
+	struct passwd *user_details = NULL;
+
+	/* Directory to chroot to */
+	char *chroot_path = NULL;
+
 	/* Save the args: we "reboot" by execing ourselves again. */
 	main_args = argv;
 
@@ -1950,6 +1968,14 @@ int main(int argc, char *argv[])
 		case 'i':
 			initrd_name = optarg;
 			break;
+		case 'u':
+			user_details = getpwnam(optarg);
+			if (!user_details)
+				err(1, "getpwnam failed, incorrect username?");
+			break;
+		case 'c':
+			chroot_path = optarg;
+			break;
 		default:
 			warnx("Unknown argument %s", argv[optind]);
 			usage();
@@ -2021,6 +2047,37 @@ int main(int argc, char *argv[])
 	/* If we exit via err(), this kills all the threads, restores tty. */
 	atexit(cleanup_devices);
 
+	/* If requested, chroot to a directory */
+	if (chroot_path) {
+		if (chroot(chroot_path) != 0)
+			err(1, "chroot(\"%s\") failed", chroot_path);
+
+		if (chdir("/") != 0)
+			err(1, "chdir(\"/\") failed");
+
+		verbose("chroot done\n");
+	}
+
+	/* If requested, drop privileges */
+	if (user_details) {
+		uid_t u;
+		gid_t g;
+
+		u = user_details->pw_uid;
+		g = user_details->pw_gid;
+
+		if (initgroups(user_details->pw_name, g) != 0)
+			err(1, "initgroups failed");
+
+		if (setresgid(g, g, g) != 0)
+			err(1, "setresgid failed");
+
+		if (setresuid(u, u, u) != 0)
+			err(1, "setresuid failed");
+
+		verbose("Dropping privileges completed\n");
+	}
+
 	/* Finally, run the Guest.  This doesn't return. */
 	run_guest();
 }
diff --git a/Documentation/lguest/lguest.txt b/Documentation/lguest/lguest.txt
index 6ccaf8e1a00e..dad99978a6a8 100644
--- a/Documentation/lguest/lguest.txt
+++ b/Documentation/lguest/lguest.txt
@@ -117,6 +117,11 @@ Running Lguest:
     
   for general information on how to get bridging to work.
 
+- Random number generation. Using the --rng option will provide a
+  /dev/hwrng in the guest that will read from the host's /dev/random.
+  Use this option in conjunction with rng-tools (see ../hw_random.txt)
+  to provide entropy to the guest kernel's /dev/random.
+
 There is a helpful mailing list at http://ozlabs.org/mailman/listinfo/lguest
 
 Good luck!
diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
index 5dc638791d97..25d2f4141d27 100644
--- a/Documentation/networking/bonding.txt
+++ b/Documentation/networking/bonding.txt
@@ -49,7 +49,8 @@ Table of Contents
 3.3	Configuring Bonding Manually with Ifenslave
 3.3.1		Configuring Multiple Bonds Manually
 3.4	Configuring Bonding Manually via Sysfs
-3.5	Overriding Configuration for Special Cases
+3.5	Configuration with Interfaces Support
+3.6	Overriding Configuration for Special Cases
 
 4. Querying Bonding Configuration
 4.1	Bonding Configuration
@@ -161,8 +162,8 @@ onwards) do not have /usr/include/linux symbolically linked to the
 default kernel source include directory.
 
 SECOND IMPORTANT NOTE:
-	If you plan to configure bonding using sysfs, you do not need
-to use ifenslave.
+	If you plan to configure bonding using sysfs or using the
+/etc/network/interfaces file, you do not need to use ifenslave.
 
 2. Bonding Driver Options
 =========================
@@ -779,22 +780,26 @@ resend_igmp
 
 	You can configure bonding using either your distro's network
 initialization scripts, or manually using either ifenslave or the
-sysfs interface.  Distros generally use one of two packages for the
-network initialization scripts: initscripts or sysconfig.  Recent
-versions of these packages have support for bonding, while older
+sysfs interface.  Distros generally use one of three packages for the
+network initialization scripts: initscripts, sysconfig or interfaces.
+Recent versions of these packages have support for bonding, while older
 versions do not.
 
 	We will first describe the options for configuring bonding for
-distros using versions of initscripts and sysconfig with full or
-partial support for bonding, then provide information on enabling
+distros using versions of initscripts, sysconfig and interfaces with full
+or partial support for bonding, then provide information on enabling
 bonding without support from the network initialization scripts (i.e.,
 older versions of initscripts or sysconfig).
 
-	If you're unsure whether your distro uses sysconfig or
-initscripts, or don't know if it's new enough, have no fear.
+	If you're unsure whether your distro uses sysconfig,
+initscripts or interfaces, or don't know if it's new enough, have no fear.
 Determining this is fairly straightforward.
 
-	First, issue the command:
+	First, look for a file called interfaces in /etc/network directory.
+If this file is present in your system, then your system use interfaces. See
+Configuration with Interfaces Support.
+
+	Else, issue the command:
 
 $ rpm -qf /sbin/ifup
 
@@ -1327,8 +1332,62 @@ echo 2000 > /sys/class/net/bond1/bonding/arp_interval
 echo +eth2 > /sys/class/net/bond1/bonding/slaves
 echo +eth3 > /sys/class/net/bond1/bonding/slaves
 
-3.5 Overriding Configuration for Special Cases
+3.5 Configuration with Interfaces Support
+-----------------------------------------
+
+        This section applies to distros which use /etc/network/interfaces file
+to describe network interface configuration, most notably Debian and it's
+derivatives.
+
+	The ifup and ifdown commands on Debian don't support bonding out of
+the box. The ifenslave-2.6 package should be installed to provide bonding
+support.  Once installed, this package will provide bond-* options to be used
+into /etc/network/interfaces.
+
+	Note that ifenslave-2.6 package will load the bonding module and use
+the ifenslave command when appropriate.
+
+Example Configurations
+----------------------
+
+In /etc/network/interfaces, the following stanza will configure bond0, in
+active-backup mode, with eth0 and eth1 as slaves.
+
+auto bond0
+iface bond0 inet dhcp
+	bond-slaves eth0 eth1
+	bond-mode active-backup
+	bond-miimon 100
+	bond-primary eth0 eth1
+
+If the above configuration doesn't work, you might have a system using
+upstart for system startup. This is most notably true for recent
+Ubuntu versions. The following stanza in /etc/network/interfaces will
+produce the same result on those systems.
+
+auto bond0
+iface bond0 inet dhcp
+	bond-slaves none
+	bond-mode active-backup
+	bond-miimon 100
+
+auto eth0
+iface eth0 inet manual
+	bond-master bond0
+	bond-primary eth0 eth1
+
+auto eth1
+iface eth1 inet manual
+	bond-master bond0
+	bond-primary eth0 eth1
+
+For a full list of bond-* supported options in /etc/network/interfaces and some
+more advanced examples tailored to you particular distros, see the files in
+/usr/share/doc/ifenslave-2.6.
+
+3.6 Overriding Configuration for Special Cases
 ----------------------------------------------
+
 When using the bonding driver, the physical port which transmits a frame is
 typically selected by the bonding driver, and is not relevant to the user or
 system administrator.  The output port is simply selected using the policies of
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index d99940dcfc44..ac3b4a726a1a 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -187,7 +187,7 @@ tcp_cookie_size - INTEGER
 tcp_dsack - BOOLEAN
 	Allows TCP to send "duplicate" SACKs.
 
-tcp_ecn - BOOLEAN
+tcp_ecn - INTEGER
 	Enable Explicit Congestion Notification (ECN) in TCP. ECN is only
 	used when both ends of the TCP flow support it. It is useful to
 	avoid losses due to congestion (when the bottleneck router supports
diff --git a/Documentation/scheduler/sched-stats.txt b/Documentation/scheduler/sched-stats.txt
index 01e69404ee5e..1cd5d51bc761 100644
--- a/Documentation/scheduler/sched-stats.txt
+++ b/Documentation/scheduler/sched-stats.txt
@@ -1,3 +1,7 @@
+Version 15 of schedstats dropped counters for some sched_yield:
+yld_exp_empty, yld_act_empty and yld_both_empty. Otherwise, it is
+identical to version 14.
+
 Version 14 of schedstats includes support for sched_domains, which hit the
 mainline kernel in 2.6.20 although it is identical to the stats from version
 12 which was in the kernel from 2.6.13-2.6.19 (version 13 never saw a kernel
@@ -28,32 +32,25 @@ to write their own scripts, the fields are described here.
 
 CPU statistics
 --------------
-cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12
-
-NOTE: In the sched_yield() statistics, the active queue is considered empty
-    if it has only one process in it, since obviously the process calling
-    sched_yield() is that process.
+cpu<N> 1 2 3 4 5 6 7 8 9
 
-First four fields are sched_yield() statistics:
-     1) # of times both the active and the expired queue were empty
-     2) # of times just the active queue was empty
-     3) # of times just the expired queue was empty
-     4) # of times sched_yield() was called
+First field is a sched_yield() statistic:
+     1) # of times sched_yield() was called
 
 Next three are schedule() statistics:
-     5) # of times we switched to the expired queue and reused it
-     6) # of times schedule() was called
-     7) # of times schedule() left the processor idle
+     2) # of times we switched to the expired queue and reused it
+     3) # of times schedule() was called
+     4) # of times schedule() left the processor idle
 
 Next two are try_to_wake_up() statistics:
-     8) # of times try_to_wake_up() was called
-     9) # of times try_to_wake_up() was called to wake up the local cpu
+     5) # of times try_to_wake_up() was called
+     6) # of times try_to_wake_up() was called to wake up the local cpu
 
 Next three are statistics describing scheduling latency:
-    10) sum of all time spent running by tasks on this processor (in jiffies)
-    11) sum of all time spent waiting to run by tasks on this processor (in
+     7) sum of all time spent running by tasks on this processor (in jiffies)
+     8) sum of all time spent waiting to run by tasks on this processor (in
         jiffies)
-    12) # of timeslices run on this cpu
+     9) # of timeslices run on this cpu
 
 
 Domain statistics
diff --git a/Documentation/sound/alsa/HD-Audio-Models.txt b/Documentation/sound/alsa/HD-Audio-Models.txt
index 16ae4300c747..0caf77e59be4 100644
--- a/Documentation/sound/alsa/HD-Audio-Models.txt
+++ b/Documentation/sound/alsa/HD-Audio-Models.txt
@@ -296,6 +296,7 @@ Conexant 5066
 =============
   laptop	Basic Laptop config (default)
   hp-laptop	HP laptops, e g G60
+  asus		Asus K52JU, Lenovo G560
   dell-laptop	Dell laptops
   dell-vostro	Dell Vostro
   olpc-xo-1_5	OLPC XO 1.5
diff --git a/Documentation/sound/alsa/soc/codec.txt b/Documentation/sound/alsa/soc/codec.txt
index 37ba3a72cb76..bce23a4a7875 100644
--- a/Documentation/sound/alsa/soc/codec.txt
+++ b/Documentation/sound/alsa/soc/codec.txt
@@ -27,42 +27,38 @@ ASoC Codec driver breakdown
 
 1 - Codec DAI and PCM configuration
 -----------------------------------
-Each codec driver must have a struct snd_soc_codec_dai to define its DAI and
+Each codec driver must have a struct snd_soc_dai_driver to define its DAI and
 PCM capabilities and operations. This struct is exported so that it can be
 registered with the core by your machine driver.
 
 e.g.
 
-struct snd_soc_codec_dai wm8731_dai = {
-	.name = "WM8731",
-	/* playback capabilities */
+static struct snd_soc_dai_ops wm8731_dai_ops = {
+	.prepare	= wm8731_pcm_prepare,
+	.hw_params	= wm8731_hw_params,
+	.shutdown	= wm8731_shutdown,
+	.digital_mute	= wm8731_mute,
+	.set_sysclk	= wm8731_set_dai_sysclk,
+	.set_fmt	= wm8731_set_dai_fmt,
+};
+
+struct snd_soc_dai_driver wm8731_dai = {
+	.name = "wm8731-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = WM8731_RATES,
 		.formats = WM8731_FORMATS,},
-	/* capture capabilities */
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = WM8731_RATES,
 		.formats = WM8731_FORMATS,},
-	/* pcm operations - see section 4 below */
-	.ops = {
-		.prepare = wm8731_pcm_prepare,
-		.hw_params = wm8731_hw_params,
-		.shutdown = wm8731_shutdown,
-	},
-	/* DAI operations - see DAI.txt */
-	.dai_ops = {
-		.digital_mute = wm8731_mute,
-		.set_sysclk = wm8731_set_dai_sysclk,
-		.set_fmt = wm8731_set_dai_fmt,
-	}
+	.ops = &wm8731_dai_ops,
+	.symmetric_rates = 1,
 };
-EXPORT_SYMBOL_GPL(wm8731_dai);
 
 
 2 - Codec control IO
@@ -186,13 +182,14 @@ when the mute is applied or freed.
 
 i.e.
 
-static int wm8974_mute(struct snd_soc_codec *codec,
-	struct snd_soc_codec_dai *dai, int mute)
+static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 {
-	u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
-	if(mute)
-		wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
+	struct snd_soc_codec *codec = dai->codec;
+	u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
+
+	if (mute)
+		snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 	else
-		wm8974_write(codec, WM8974_DAC, mute_reg);
+		snd_soc_write(codec, WM8974_DAC, mute_reg);
 	return 0;
 }
diff --git a/Documentation/sound/alsa/soc/machine.txt b/Documentation/sound/alsa/soc/machine.txt
index 2524c75557df..3e2ec9cbf397 100644
--- a/Documentation/sound/alsa/soc/machine.txt
+++ b/Documentation/sound/alsa/soc/machine.txt
@@ -12,6 +12,8 @@ the following struct:-
 struct snd_soc_card {
 	char *name;
 
+	...
+
 	int (*probe)(struct platform_device *pdev);
 	int (*remove)(struct platform_device *pdev);
 
@@ -22,12 +24,13 @@ struct snd_soc_card {
 	int (*resume_pre)(struct platform_device *pdev);
 	int (*resume_post)(struct platform_device *pdev);
 
-	/* machine stream operations */
-	struct snd_soc_ops *ops;
+	...
 
 	/* CPU <--> Codec DAI links  */
 	struct snd_soc_dai_link *dai_link;
 	int num_links;
+
+	...
 };
 
 probe()/remove()
@@ -42,11 +45,6 @@ of any machine audio tasks that have to be done before or after the codec, DAIs
 and DMA is suspended and resumed. Optional.
 
 
-Machine operations
-------------------
-The machine specific audio operations can be set here. Again this is optional.
-
-
 Machine DAI Configuration
 -------------------------
 The machine DAI configuration glues all the codec and CPU DAIs together. It can
@@ -61,8 +59,10 @@ struct snd_soc_dai_link is used to set up each DAI in your machine. e.g.
 static struct snd_soc_dai_link corgi_dai = {
 	.name = "WM8731",
 	.stream_name = "WM8731",
-	.cpu_dai = &pxa_i2s_dai,
-	.codec_dai = &wm8731_dai,
+	.cpu_dai_name = "pxa-is2-dai",
+	.codec_dai_name = "wm8731-hifi",
+	.platform_name = "pxa-pcm-audio",
+	.codec_name = "wm8713-codec.0-001a",
 	.init = corgi_wm8731_init,
 	.ops = &corgi_ops,
 };
@@ -77,26 +77,6 @@ static struct snd_soc_card snd_soc_corgi = {
 };
 
 
-Machine Audio Subsystem
------------------------
-
-The machine soc device glues the platform, machine and codec driver together.
-Private data can also be set here. e.g.
-
-/* corgi audio private data */
-static struct wm8731_setup_data corgi_wm8731_setup = {
-	.i2c_address = 0x1b,
-};
-
-/* corgi audio subsystem */
-static struct snd_soc_device corgi_snd_devdata = {
-	.machine = &snd_soc_corgi,
-	.platform = &pxa2xx_soc_platform,
-	.codec_dev = &soc_codec_dev_wm8731,
-	.codec_data = &corgi_wm8731_setup,
-};
-
-
 Machine Power Map
 -----------------
 
diff --git a/Documentation/sound/alsa/soc/platform.txt b/Documentation/sound/alsa/soc/platform.txt
index 06d835987c6a..d57efad37e0a 100644
--- a/Documentation/sound/alsa/soc/platform.txt
+++ b/Documentation/sound/alsa/soc/platform.txt
@@ -20,9 +20,10 @@ struct snd_soc_ops {
 	int (*trigger)(struct snd_pcm_substream *, int);
 };
 
-The platform driver exports its DMA functionality via struct snd_soc_platform:-
+The platform driver exports its DMA functionality via struct
+snd_soc_platform_driver:-
 
-struct snd_soc_platform {
+struct snd_soc_platform_driver {
 	char *name;
 
 	int (*probe)(struct platform_device *pdev);
@@ -34,6 +35,13 @@ struct snd_soc_platform {
 	int (*pcm_new)(struct snd_card *, struct snd_soc_codec_dai *, struct snd_pcm *);
 	void (*pcm_free)(struct snd_pcm *);
 
+	/*
+	 * For platform caused delay reporting.
+	 * Optional.
+	 */
+	snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
+		struct snd_soc_dai *);
+
 	/* platform stream ops */
 	struct snd_pcm_ops *pcm_ops;
 };
diff --git a/Documentation/target/tcm_mod_builder.py b/Documentation/target/tcm_mod_builder.py
new file mode 100755
index 000000000000..dbeb8a0d7175
--- /dev/null
+++ b/Documentation/target/tcm_mod_builder.py
@@ -0,0 +1,1094 @@
+#!/usr/bin/python
+# The TCM v4 multi-protocol fabric module generation script for drivers/target/$NEW_MOD
+#
+# Copyright (c) 2010 Rising Tide Systems
+# Copyright (c) 2010 Linux-iSCSI.org
+#
+# Author: nab@kernel.org
+#
+import os, sys
+import subprocess as sub
+import string
+import re
+import optparse
+
+tcm_dir = ""
+
+fabric_ops = []
+fabric_mod_dir = ""
+fabric_mod_port = ""
+fabric_mod_init_port = ""
+
+def tcm_mod_err(msg):
+	print msg
+	sys.exit(1)
+
+def tcm_mod_create_module_subdir(fabric_mod_dir_var):
+
+	if os.path.isdir(fabric_mod_dir_var) == True:
+		return 1
+
+	print "Creating fabric_mod_dir: " + fabric_mod_dir_var
+	ret = os.mkdir(fabric_mod_dir_var)
+	if ret:
+		tcm_mod_err("Unable to mkdir " + fabric_mod_dir_var)
+
+	return
+
+def tcm_mod_build_FC_include(fabric_mod_dir_var, fabric_mod_name):
+	global fabric_mod_port
+	global fabric_mod_init_port
+	buf = ""
+
+	f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+	print "Writing file: " + f
+
+	p = open(f, 'w');
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	buf = "#define " + fabric_mod_name.upper() + "_VERSION	\"v0.1\"\n"
+	buf += "#define " + fabric_mod_name.upper() + "_NAMELEN	32\n"
+	buf += "\n"
+	buf += "struct " + fabric_mod_name + "_nacl {\n"
+	buf += "	/* Binary World Wide unique Port Name for FC Initiator Nport */\n"
+	buf += "	u64 nport_wwpn;\n"
+	buf += "	/* ASCII formatted WWPN for FC Initiator Nport */\n"
+	buf += "	char nport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+	buf += "	struct se_node_acl se_node_acl;\n"
+	buf += "};\n"
+	buf += "\n"
+	buf += "struct " + fabric_mod_name + "_tpg {\n"
+	buf += "	/* FC lport target portal group tag for TCM */\n"
+	buf += "	u16 lport_tpgt;\n"
+	buf += "	/* Pointer back to " + fabric_mod_name + "_lport */\n"
+	buf += "	struct " + fabric_mod_name + "_lport *lport;\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+	buf += "	struct se_portal_group se_tpg;\n"
+	buf += "};\n"
+	buf += "\n"
+	buf += "struct " + fabric_mod_name + "_lport {\n"
+	buf += "	/* SCSI protocol the lport is providing */\n"
+	buf += "	u8 lport_proto_id;\n"
+	buf += "	/* Binary World Wide unique Port Name for FC Target Lport */\n"
+	buf += "	u64 lport_wwpn;\n"
+	buf += "	/* ASCII formatted WWPN for FC Target Lport */\n"
+	buf += "	char lport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_lport() */\n"
+	buf += "	struct se_wwn lport_wwn;\n"
+	buf += "};\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+
+	fabric_mod_port = "lport"
+	fabric_mod_init_port = "nport"
+
+	return
+
+def tcm_mod_build_SAS_include(fabric_mod_dir_var, fabric_mod_name):
+	global fabric_mod_port
+	global fabric_mod_init_port
+	buf = ""
+
+	f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+	print "Writing file: " + f
+
+	p = open(f, 'w');
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	buf = "#define " + fabric_mod_name.upper() + "_VERSION  \"v0.1\"\n"
+	buf += "#define " + fabric_mod_name.upper() + "_NAMELEN 32\n"
+	buf += "\n"
+	buf += "struct " + fabric_mod_name + "_nacl {\n"
+	buf += "	/* Binary World Wide unique Port Name for SAS Initiator port */\n"
+	buf += "	u64 iport_wwpn;\n"
+	buf += "	/* ASCII formatted WWPN for Sas Initiator port */\n"
+	buf += "	char iport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+	buf += "	struct se_node_acl se_node_acl;\n"
+	buf += "};\n\n"
+	buf += "struct " + fabric_mod_name + "_tpg {\n"
+	buf += "	/* SAS port target portal group tag for TCM */\n"
+	buf += "	u16 tport_tpgt;\n"
+	buf += "	/* Pointer back to " + fabric_mod_name + "_tport */\n"
+	buf += "	struct " + fabric_mod_name + "_tport *tport;\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+	buf += "	struct se_portal_group se_tpg;\n"
+	buf += "};\n\n"
+	buf += "struct " + fabric_mod_name + "_tport {\n"
+	buf += "	/* SCSI protocol the tport is providing */\n"
+	buf += "	u8 tport_proto_id;\n"
+	buf += "	/* Binary World Wide unique Port Name for SAS Target port */\n"
+	buf += "	u64 tport_wwpn;\n"
+	buf += "	/* ASCII formatted WWPN for SAS Target port */\n"
+	buf += "	char tport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_tport() */\n"
+	buf += "	struct se_wwn tport_wwn;\n"
+	buf += "};\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+
+	fabric_mod_port = "tport"
+	fabric_mod_init_port = "iport"
+
+	return
+
+def tcm_mod_build_iSCSI_include(fabric_mod_dir_var, fabric_mod_name):
+	global fabric_mod_port
+	global fabric_mod_init_port
+	buf = ""
+
+	f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+	print "Writing file: " + f
+
+	p = open(f, 'w');
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	buf = "#define " + fabric_mod_name.upper() + "_VERSION  \"v0.1\"\n"
+	buf += "#define " + fabric_mod_name.upper() + "_NAMELEN 32\n"
+	buf += "\n"
+	buf += "struct " + fabric_mod_name + "_nacl {\n"
+	buf += "	/* ASCII formatted InitiatorName */\n"
+	buf += "	char iport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+	buf += "	struct se_node_acl se_node_acl;\n"
+	buf += "};\n\n"
+	buf += "struct " + fabric_mod_name + "_tpg {\n"
+	buf += "	/* iSCSI target portal group tag for TCM */\n"
+	buf += "	u16 tport_tpgt;\n"
+	buf += "	/* Pointer back to " + fabric_mod_name + "_tport */\n"
+	buf += "	struct " + fabric_mod_name + "_tport *tport;\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+	buf += "	struct se_portal_group se_tpg;\n"
+	buf += "};\n\n"
+	buf += "struct " + fabric_mod_name + "_tport {\n"
+	buf += "	/* SCSI protocol the tport is providing */\n"
+	buf += "	u8 tport_proto_id;\n"
+	buf += "	/* ASCII formatted TargetName for IQN */\n"
+	buf += "	char tport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+	buf += "	/* Returned by " + fabric_mod_name + "_make_tport() */\n"
+	buf += "	struct se_wwn tport_wwn;\n"
+	buf += "};\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+
+	fabric_mod_port = "tport"
+	fabric_mod_init_port = "iport"
+
+	return
+
+def tcm_mod_build_base_includes(proto_ident, fabric_mod_dir_val, fabric_mod_name):
+
+	if proto_ident == "FC":
+		tcm_mod_build_FC_include(fabric_mod_dir_val, fabric_mod_name)
+	elif proto_ident == "SAS":
+		tcm_mod_build_SAS_include(fabric_mod_dir_val, fabric_mod_name)
+	elif proto_ident == "iSCSI":
+		tcm_mod_build_iSCSI_include(fabric_mod_dir_val, fabric_mod_name)
+	else:
+		print "Unsupported proto_ident: " + proto_ident
+		sys.exit(1)
+
+	return
+
+def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name):
+	buf = ""
+
+	f = fabric_mod_dir_var + "/" + fabric_mod_name + "_configfs.c"
+	print "Writing file: " + f
+
+        p = open(f, 'w');
+        if not p:
+                tcm_mod_err("Unable to open file: " + f)
+
+	buf = "#include <linux/module.h>\n"
+	buf += "#include <linux/moduleparam.h>\n"
+	buf += "#include <linux/version.h>\n"
+	buf += "#include <generated/utsrelease.h>\n"
+	buf += "#include <linux/utsname.h>\n"
+	buf += "#include <linux/init.h>\n"
+	buf += "#include <linux/slab.h>\n"
+	buf += "#include <linux/kthread.h>\n"
+	buf += "#include <linux/types.h>\n"
+	buf += "#include <linux/string.h>\n"
+	buf += "#include <linux/configfs.h>\n"
+	buf += "#include <linux/ctype.h>\n"
+	buf += "#include <asm/unaligned.h>\n\n"
+	buf += "#include <target/target_core_base.h>\n"
+	buf += "#include <target/target_core_transport.h>\n"
+	buf += "#include <target/target_core_fabric_ops.h>\n"
+	buf += "#include <target/target_core_fabric_configfs.h>\n"
+	buf += "#include <target/target_core_fabric_lib.h>\n"
+	buf += "#include <target/target_core_device.h>\n"
+	buf += "#include <target/target_core_tpg.h>\n"
+	buf += "#include <target/target_core_configfs.h>\n"
+	buf += "#include <target/target_core_base.h>\n"
+	buf += "#include <target/configfs_macros.h>\n\n"
+	buf += "#include <" + fabric_mod_name + "_base.h>\n"
+	buf += "#include <" + fabric_mod_name + "_fabric.h>\n\n"
+
+	buf += "/* Local pointer to allocated TCM configfs fabric module */\n"
+	buf += "struct target_fabric_configfs *" + fabric_mod_name + "_fabric_configfs;\n\n"
+
+	buf += "static struct se_node_acl *" + fabric_mod_name + "_make_nodeacl(\n"
+	buf += "	struct se_portal_group *se_tpg,\n"
+	buf += "	struct config_group *group,\n"
+	buf += "	const char *name)\n"
+	buf += "{\n"
+	buf += "	struct se_node_acl *se_nacl, *se_nacl_new;\n"
+	buf += "	struct " + fabric_mod_name + "_nacl *nacl;\n"
+
+	if proto_ident == "FC" or proto_ident == "SAS":
+		buf += "	u64 wwpn = 0;\n"
+
+	buf += "	u32 nexus_depth;\n\n"
+	buf += "	/* " + fabric_mod_name + "_parse_wwn(name, &wwpn, 1) < 0)\n"
+	buf += "		return ERR_PTR(-EINVAL); */\n"
+	buf += "	se_nacl_new = " + fabric_mod_name + "_alloc_fabric_acl(se_tpg);\n"
+	buf += "	if (!(se_nacl_new))\n"
+	buf += "		return ERR_PTR(-ENOMEM);\n"
+	buf += "//#warning FIXME: Hardcoded nexus depth in " + fabric_mod_name + "_make_nodeacl()\n"
+	buf += "	nexus_depth = 1;\n"
+	buf += "	/*\n"
+	buf += "	 * se_nacl_new may be released by core_tpg_add_initiator_node_acl()\n"
+	buf += "	 * when converting a NodeACL from demo mode -> explict\n"
+	buf += "	 */\n"
+	buf += "	se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,\n"
+	buf += "				name, nexus_depth);\n"
+	buf += "	if (IS_ERR(se_nacl)) {\n"
+	buf += "		" + fabric_mod_name + "_release_fabric_acl(se_tpg, se_nacl_new);\n"
+	buf += "		return se_nacl;\n"
+	buf += "	}\n"
+	buf += "	/*\n"
+	buf += "	 * Locate our struct " + fabric_mod_name + "_nacl and set the FC Nport WWPN\n"
+	buf += "	 */\n"
+	buf += "	nacl = container_of(se_nacl, struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+
+	if proto_ident == "FC" or proto_ident == "SAS":
+		buf += "	nacl->" + fabric_mod_init_port + "_wwpn = wwpn;\n"
+
+	buf += "	/* " + fabric_mod_name + "_format_wwn(&nacl->" + fabric_mod_init_port + "_name[0], " + fabric_mod_name.upper() + "_NAMELEN, wwpn); */\n\n"
+	buf += "	return se_nacl;\n"
+	buf += "}\n\n"
+	buf += "static void " + fabric_mod_name + "_drop_nodeacl(struct se_node_acl *se_acl)\n"
+	buf += "{\n"
+	buf += "	struct " + fabric_mod_name + "_nacl *nacl = container_of(se_acl,\n"
+	buf += "				struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+	buf += "	kfree(nacl);\n"
+	buf += "}\n\n"
+
+	buf += "static struct se_portal_group *" + fabric_mod_name + "_make_tpg(\n"
+	buf += "	struct se_wwn *wwn,\n"
+	buf += "	struct config_group *group,\n"
+	buf += "	const char *name)\n"
+	buf += "{\n"
+	buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + "*" + fabric_mod_port + " = container_of(wwn,\n"
+	buf += "			struct " + fabric_mod_name + "_" + fabric_mod_port + ", " + fabric_mod_port + "_wwn);\n\n"
+	buf += "	struct " + fabric_mod_name + "_tpg *tpg;\n"
+	buf += "	unsigned long tpgt;\n"
+	buf += "	int ret;\n\n"
+	buf += "	if (strstr(name, \"tpgt_\") != name)\n"
+	buf += "		return ERR_PTR(-EINVAL);\n"
+	buf += "	if (strict_strtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX)\n"
+	buf += "		return ERR_PTR(-EINVAL);\n\n"
+	buf += "	tpg = kzalloc(sizeof(struct " + fabric_mod_name + "_tpg), GFP_KERNEL);\n"
+	buf += "	if (!(tpg)) {\n"
+	buf += "		printk(KERN_ERR \"Unable to allocate struct " + fabric_mod_name + "_tpg\");\n"
+	buf += "		return ERR_PTR(-ENOMEM);\n"
+	buf += "	}\n"
+	buf += "	tpg->" + fabric_mod_port + " = " + fabric_mod_port + ";\n"
+	buf += "	tpg->" + fabric_mod_port + "_tpgt = tpgt;\n\n"
+	buf += "	ret = core_tpg_register(&" + fabric_mod_name + "_fabric_configfs->tf_ops, wwn,\n"
+	buf += "				&tpg->se_tpg, (void *)tpg,\n"
+	buf += "				TRANSPORT_TPG_TYPE_NORMAL);\n"
+	buf += "	if (ret < 0) {\n"
+	buf += "		kfree(tpg);\n"
+	buf += "		return NULL;\n"
+	buf += "	}\n"
+	buf += "	return &tpg->se_tpg;\n"
+	buf += "}\n\n"
+	buf += "static void " + fabric_mod_name + "_drop_tpg(struct se_portal_group *se_tpg)\n"
+	buf += "{\n"
+	buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+	buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n\n"
+	buf += "	core_tpg_deregister(se_tpg);\n"
+	buf += "	kfree(tpg);\n"
+	buf += "}\n\n"
+
+	buf += "static struct se_wwn *" + fabric_mod_name + "_make_" + fabric_mod_port + "(\n"
+	buf += "	struct target_fabric_configfs *tf,\n"
+	buf += "	struct config_group *group,\n"
+	buf += "	const char *name)\n"
+	buf += "{\n"
+	buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + ";\n"
+
+	if proto_ident == "FC" or proto_ident == "SAS":
+		buf += "	u64 wwpn = 0;\n\n"
+
+	buf += "	/* if (" + fabric_mod_name + "_parse_wwn(name, &wwpn, 1) < 0)\n"
+	buf += "		return ERR_PTR(-EINVAL); */\n\n"
+	buf += "	" + fabric_mod_port + " = kzalloc(sizeof(struct " + fabric_mod_name + "_" + fabric_mod_port + "), GFP_KERNEL);\n"
+	buf += "	if (!(" + fabric_mod_port + ")) {\n"
+	buf += "		printk(KERN_ERR \"Unable to allocate struct " + fabric_mod_name + "_" + fabric_mod_port + "\");\n"
+	buf += "		return ERR_PTR(-ENOMEM);\n"
+	buf += "	}\n"
+
+	if proto_ident == "FC" or proto_ident == "SAS":
+		buf += "	" + fabric_mod_port + "->" + fabric_mod_port + "_wwpn = wwpn;\n"
+
+	buf += "	/* " + fabric_mod_name + "_format_wwn(&" + fabric_mod_port + "->" + fabric_mod_port + "_name[0], " + fabric_mod_name.upper() + "__NAMELEN, wwpn); */\n\n"
+	buf += "	return &" + fabric_mod_port + "->" + fabric_mod_port + "_wwn;\n"
+	buf += "}\n\n"
+	buf += "static void " + fabric_mod_name + "_drop_" + fabric_mod_port + "(struct se_wwn *wwn)\n"
+	buf += "{\n"
+	buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = container_of(wwn,\n"
+	buf += "				struct " + fabric_mod_name + "_" + fabric_mod_port + ", " + fabric_mod_port + "_wwn);\n"
+	buf += "	kfree(" + fabric_mod_port + ");\n"
+	buf += "}\n\n"
+	buf += "static ssize_t " + fabric_mod_name + "_wwn_show_attr_version(\n"
+	buf += "	struct target_fabric_configfs *tf,\n"
+	buf += "	char *page)\n"
+	buf += "{\n"
+	buf += "	return sprintf(page, \"" + fabric_mod_name.upper() + " fabric module %s on %s/%s\"\n"
+	buf += "		\"on \"UTS_RELEASE\"\\n\", " + fabric_mod_name.upper() + "_VERSION, utsname()->sysname,\n"
+	buf += "		utsname()->machine);\n"
+	buf += "}\n\n"
+	buf += "TF_WWN_ATTR_RO(" + fabric_mod_name + ", version);\n\n"
+	buf += "static struct configfs_attribute *" + fabric_mod_name + "_wwn_attrs[] = {\n"
+	buf += "	&" + fabric_mod_name + "_wwn_version.attr,\n"
+	buf += "	NULL,\n"
+	buf += "};\n\n"
+
+	buf += "static struct target_core_fabric_ops " + fabric_mod_name + "_ops = {\n"
+	buf += "	.get_fabric_name		= " + fabric_mod_name + "_get_fabric_name,\n"
+	buf += "	.get_fabric_proto_ident		= " + fabric_mod_name + "_get_fabric_proto_ident,\n"
+	buf += "	.tpg_get_wwn			= " + fabric_mod_name + "_get_fabric_wwn,\n"
+	buf += "	.tpg_get_tag			= " + fabric_mod_name + "_get_tag,\n"
+	buf += "	.tpg_get_default_depth		= " + fabric_mod_name + "_get_default_depth,\n"
+	buf += "	.tpg_get_pr_transport_id	= " + fabric_mod_name + "_get_pr_transport_id,\n"
+	buf += "	.tpg_get_pr_transport_id_len	= " + fabric_mod_name + "_get_pr_transport_id_len,\n"
+	buf += "	.tpg_parse_pr_out_transport_id	= " + fabric_mod_name + "_parse_pr_out_transport_id,\n"
+	buf += "	.tpg_check_demo_mode		= " + fabric_mod_name + "_check_false,\n"
+	buf += "	.tpg_check_demo_mode_cache	= " + fabric_mod_name + "_check_true,\n"
+	buf += "	.tpg_check_demo_mode_write_protect = " + fabric_mod_name + "_check_true,\n"
+	buf += "	.tpg_check_prod_mode_write_protect = " + fabric_mod_name + "_check_false,\n"
+	buf += "	.tpg_alloc_fabric_acl		= " + fabric_mod_name + "_alloc_fabric_acl,\n"
+	buf += "	.tpg_release_fabric_acl		= " + fabric_mod_name + "_release_fabric_acl,\n"
+	buf += "	.tpg_get_inst_index		= " + fabric_mod_name + "_tpg_get_inst_index,\n"
+	buf += "	.release_cmd_to_pool		= " + fabric_mod_name + "_release_cmd,\n"
+	buf += "	.release_cmd_direct		= " + fabric_mod_name + "_release_cmd,\n"
+	buf += "	.shutdown_session		= " + fabric_mod_name + "_shutdown_session,\n"
+	buf += "	.close_session			= " + fabric_mod_name + "_close_session,\n"
+	buf += "	.stop_session			= " + fabric_mod_name + "_stop_session,\n"
+	buf += "	.fall_back_to_erl0		= " + fabric_mod_name + "_reset_nexus,\n"
+	buf += "	.sess_logged_in			= " + fabric_mod_name + "_sess_logged_in,\n"
+	buf += "	.sess_get_index			= " + fabric_mod_name + "_sess_get_index,\n"
+	buf += "	.sess_get_initiator_sid		= NULL,\n"
+	buf += "	.write_pending			= " + fabric_mod_name + "_write_pending,\n"
+	buf += "	.write_pending_status		= " + fabric_mod_name + "_write_pending_status,\n"
+	buf += "	.set_default_node_attributes	= " + fabric_mod_name + "_set_default_node_attrs,\n"
+	buf += "	.get_task_tag			= " + fabric_mod_name + "_get_task_tag,\n"
+	buf += "	.get_cmd_state			= " + fabric_mod_name + "_get_cmd_state,\n"
+	buf += "	.new_cmd_failure		= " + fabric_mod_name + "_new_cmd_failure,\n"
+	buf += "	.queue_data_in			= " + fabric_mod_name + "_queue_data_in,\n"
+	buf += "	.queue_status			= " + fabric_mod_name + "_queue_status,\n"
+	buf += "	.queue_tm_rsp			= " + fabric_mod_name + "_queue_tm_rsp,\n"
+	buf += "	.get_fabric_sense_len		= " + fabric_mod_name + "_get_fabric_sense_len,\n"
+	buf += "	.set_fabric_sense_len		= " + fabric_mod_name + "_set_fabric_sense_len,\n"
+	buf += "	.is_state_remove		= " + fabric_mod_name + "_is_state_remove,\n"
+	buf += "	.pack_lun			= " + fabric_mod_name + "_pack_lun,\n"
+	buf += "	/*\n"
+	buf += "	 * Setup function pointers for generic logic in target_core_fabric_configfs.c\n"
+	buf += "	 */\n"
+	buf += "	.fabric_make_wwn		= " + fabric_mod_name + "_make_" + fabric_mod_port + ",\n"
+	buf += "	.fabric_drop_wwn		= " + fabric_mod_name + "_drop_" + fabric_mod_port + ",\n"
+	buf += "	.fabric_make_tpg		= " + fabric_mod_name + "_make_tpg,\n"
+	buf += "	.fabric_drop_tpg		= " + fabric_mod_name + "_drop_tpg,\n"
+	buf += "	.fabric_post_link		= NULL,\n"
+	buf += "	.fabric_pre_unlink		= NULL,\n"
+	buf += "	.fabric_make_np			= NULL,\n"
+	buf += "	.fabric_drop_np			= NULL,\n"
+	buf += "	.fabric_make_nodeacl		= " + fabric_mod_name + "_make_nodeacl,\n"
+	buf += "	.fabric_drop_nodeacl		= " + fabric_mod_name + "_drop_nodeacl,\n"
+	buf += "};\n\n"
+
+	buf += "static int " + fabric_mod_name + "_register_configfs(void)\n"
+	buf += "{\n"
+	buf += "	struct target_fabric_configfs *fabric;\n"
+	buf += "	int ret;\n\n"
+	buf += "	printk(KERN_INFO \"" + fabric_mod_name.upper() + " fabric module %s on %s/%s\"\n"
+	buf += "		\" on \"UTS_RELEASE\"\\n\"," + fabric_mod_name.upper() + "_VERSION, utsname()->sysname,\n"
+	buf += "		utsname()->machine);\n"
+	buf += "	/*\n"
+	buf += "	 * Register the top level struct config_item_type with TCM core\n"
+	buf += "	 */\n"
+	buf += "	fabric = target_fabric_configfs_init(THIS_MODULE, \"" + fabric_mod_name[4:] + "\");\n"
+	buf += "	if (!(fabric)) {\n"
+	buf += "		printk(KERN_ERR \"target_fabric_configfs_init() failed\\n\");\n"
+	buf += "		return -ENOMEM;\n"
+	buf += "	}\n"
+	buf += "	/*\n"
+	buf += "	 * Setup fabric->tf_ops from our local " + fabric_mod_name + "_ops\n"
+	buf += "	 */\n"
+	buf += "	fabric->tf_ops = " + fabric_mod_name + "_ops;\n"
+	buf += "	/*\n"
+	buf += "	 * Setup default attribute lists for various fabric->tf_cit_tmpl\n"
+	buf += "	 */\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = " + fabric_mod_name + "_wwn_attrs;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;\n"
+	buf += "	TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;\n"
+	buf += "	/*\n"
+	buf += "	 * Register the fabric for use within TCM\n"
+	buf += "	 */\n"
+	buf += "	ret = target_fabric_configfs_register(fabric);\n"
+	buf += "	if (ret < 0) {\n"
+	buf += "		printk(KERN_ERR \"target_fabric_configfs_register() failed\"\n"
+	buf += "				\" for " + fabric_mod_name.upper() + "\\n\");\n"
+	buf += "		return ret;\n"
+	buf += "	}\n"
+	buf += "	/*\n"
+	buf += "	 * Setup our local pointer to *fabric\n"
+	buf += "	 */\n"
+	buf += "	" + fabric_mod_name + "_fabric_configfs = fabric;\n"
+	buf += "	printk(KERN_INFO \"" +  fabric_mod_name.upper() + "[0] - Set fabric -> " + fabric_mod_name + "_fabric_configfs\\n\");\n"
+	buf += "	return 0;\n"
+	buf += "};\n\n"
+	buf += "static void " + fabric_mod_name + "_deregister_configfs(void)\n"
+	buf += "{\n"
+	buf += "	if (!(" + fabric_mod_name + "_fabric_configfs))\n"
+	buf += "		return;\n\n"
+	buf += "	target_fabric_configfs_deregister(" + fabric_mod_name + "_fabric_configfs);\n"
+	buf += "	" + fabric_mod_name + "_fabric_configfs = NULL;\n"
+	buf += "	printk(KERN_INFO \"" +  fabric_mod_name.upper() + "[0] - Cleared " + fabric_mod_name + "_fabric_configfs\\n\");\n"
+	buf += "};\n\n"
+
+	buf += "static int __init " + fabric_mod_name + "_init(void)\n"
+	buf += "{\n"
+	buf += "	int ret;\n\n"
+	buf += "	ret = " + fabric_mod_name + "_register_configfs();\n"
+	buf += "	if (ret < 0)\n"
+	buf += "		return ret;\n\n"
+	buf += "	return 0;\n"
+	buf += "};\n\n"
+	buf += "static void " + fabric_mod_name + "_exit(void)\n"
+	buf += "{\n"
+	buf += "	" + fabric_mod_name + "_deregister_configfs();\n"
+	buf += "};\n\n"
+
+	buf += "#ifdef MODULE\n"
+	buf += "MODULE_DESCRIPTION(\"" + fabric_mod_name.upper() + " series fabric driver\");\n"
+	buf += "MODULE_LICENSE(\"GPL\");\n"
+	buf += "module_init(" + fabric_mod_name + "_init);\n"
+	buf += "module_exit(" + fabric_mod_name + "_exit);\n"
+	buf += "#endif\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+
+	return
+
+def tcm_mod_scan_fabric_ops(tcm_dir):
+
+	fabric_ops_api = tcm_dir + "include/target/target_core_fabric_ops.h"
+
+	print "Using tcm_mod_scan_fabric_ops: " + fabric_ops_api
+	process_fo = 0;
+
+	p = open(fabric_ops_api, 'r')
+
+	line = p.readline()
+	while line:
+		if process_fo == 0 and re.search('struct target_core_fabric_ops {', line):
+			line = p.readline()
+			continue
+
+		if process_fo == 0:
+			process_fo = 1;
+			line = p.readline()
+			# Search for function pointer
+			if not re.search('\(\*', line):
+				continue
+
+			fabric_ops.append(line.rstrip())
+			continue
+
+		line = p.readline()
+		# Search for function pointer
+		if not re.search('\(\*', line):
+			continue
+
+		fabric_ops.append(line.rstrip())
+
+	p.close()
+	return
+
+def tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir_var, fabric_mod_name):
+	buf = ""
+	bufi = ""
+
+	f = fabric_mod_dir_var + "/" + fabric_mod_name + "_fabric.c"
+	print "Writing file: " + f
+
+	p = open(f, 'w')
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	fi = fabric_mod_dir_var + "/" + fabric_mod_name + "_fabric.h"
+	print "Writing file: " + fi
+
+	pi = open(fi, 'w')
+	if not pi:
+		tcm_mod_err("Unable to open file: " + fi)
+
+	buf = "#include <linux/slab.h>\n"
+	buf += "#include <linux/kthread.h>\n"
+	buf += "#include <linux/types.h>\n"
+	buf += "#include <linux/list.h>\n"
+	buf += "#include <linux/types.h>\n"
+	buf += "#include <linux/string.h>\n"
+	buf += "#include <linux/ctype.h>\n"
+	buf += "#include <asm/unaligned.h>\n"
+	buf += "#include <scsi/scsi.h>\n"
+	buf += "#include <scsi/scsi_host.h>\n"
+	buf += "#include <scsi/scsi_device.h>\n"
+	buf += "#include <scsi/scsi_cmnd.h>\n"
+	buf += "#include <scsi/libfc.h>\n\n"
+	buf += "#include <target/target_core_base.h>\n"
+	buf += "#include <target/target_core_transport.h>\n"
+	buf += "#include <target/target_core_fabric_ops.h>\n"
+	buf += "#include <target/target_core_fabric_lib.h>\n"
+	buf += "#include <target/target_core_device.h>\n"
+	buf += "#include <target/target_core_tpg.h>\n"
+	buf += "#include <target/target_core_configfs.h>\n"
+	buf += "#include <" + fabric_mod_name + "_base.h>\n"
+	buf += "#include <" + fabric_mod_name + "_fabric.h>\n\n"
+
+	buf += "int " + fabric_mod_name + "_check_true(struct se_portal_group *se_tpg)\n"
+	buf += "{\n"
+	buf += "	return 1;\n"
+	buf += "}\n\n"
+	bufi += "int " + fabric_mod_name + "_check_true(struct se_portal_group *);\n"
+
+	buf += "int " + fabric_mod_name + "_check_false(struct se_portal_group *se_tpg)\n"
+	buf += "{\n"
+	buf += "	return 0;\n"
+	buf += "}\n\n"
+	bufi += "int " + fabric_mod_name + "_check_false(struct se_portal_group *);\n"
+
+	total_fabric_ops = len(fabric_ops)
+	i = 0
+
+	while i < total_fabric_ops:
+		fo = fabric_ops[i]
+		i += 1
+#		print "fabric_ops: " + fo
+
+		if re.search('get_fabric_name', fo):
+			buf += "char *" + fabric_mod_name + "_get_fabric_name(void)\n"
+			buf += "{\n"
+			buf += "	return \"" + fabric_mod_name[4:] + "\";\n"
+			buf += "}\n\n"
+			bufi += "char *" + fabric_mod_name + "_get_fabric_name(void);\n"
+			continue
+
+		if re.search('get_fabric_proto_ident', fo):
+			buf += "u8 " + fabric_mod_name + "_get_fabric_proto_ident(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+			buf += "	u8 proto_id;\n\n"
+			buf += "	switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+			if proto_ident == "FC":
+				buf += "	case SCSI_PROTOCOL_FCP:\n"
+				buf += "	default:\n"
+				buf += "		proto_id = fc_get_fabric_proto_ident(se_tpg);\n"
+				buf += "		break;\n"
+			elif proto_ident == "SAS":
+				buf += "	case SCSI_PROTOCOL_SAS:\n"
+				buf += "	default:\n"
+				buf += "		proto_id = sas_get_fabric_proto_ident(se_tpg);\n"
+				buf += "		break;\n"
+			elif proto_ident == "iSCSI":
+				buf += "	case SCSI_PROTOCOL_ISCSI:\n"
+				buf += "	default:\n"
+				buf += "		proto_id = iscsi_get_fabric_proto_ident(se_tpg);\n"
+				buf += "		break;\n"
+
+			buf += "	}\n\n"
+			buf += "	return proto_id;\n"
+			buf += "}\n\n"
+			bufi += "u8 " + fabric_mod_name + "_get_fabric_proto_ident(struct se_portal_group *);\n"
+
+		if re.search('get_wwn', fo):
+			buf += "char *" + fabric_mod_name + "_get_fabric_wwn(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n\n"
+			buf += "	return &" + fabric_mod_port + "->" + fabric_mod_port + "_name[0];\n"
+			buf += "}\n\n"
+			bufi += "char *" + fabric_mod_name + "_get_fabric_wwn(struct se_portal_group *);\n"
+
+		if re.search('get_tag', fo):
+			buf += "u16 " + fabric_mod_name + "_get_tag(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	return tpg->" + fabric_mod_port + "_tpgt;\n"
+			buf += "}\n\n"
+			bufi += "u16 " + fabric_mod_name + "_get_tag(struct se_portal_group *);\n"
+
+		if re.search('get_default_depth', fo):
+			buf += "u32 " + fabric_mod_name + "_get_default_depth(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	return 1;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_get_default_depth(struct se_portal_group *);\n"
+
+		if re.search('get_pr_transport_id\)\(', fo):
+			buf += "u32 " + fabric_mod_name + "_get_pr_transport_id(\n"
+			buf += "	struct se_portal_group *se_tpg,\n"
+			buf += "	struct se_node_acl *se_nacl,\n"
+			buf += "	struct t10_pr_registration *pr_reg,\n"
+			buf += "	int *format_code,\n"
+			buf += "	unsigned char *buf)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+			buf += "	int ret = 0;\n\n"
+			buf += "	switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+			if proto_ident == "FC":
+				buf += "	case SCSI_PROTOCOL_FCP:\n"
+				buf += "	default:\n"
+				buf += "		ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code, buf);\n"
+				buf += "		break;\n"
+			elif proto_ident == "SAS":
+				buf += "	case SCSI_PROTOCOL_SAS:\n"
+				buf += "	default:\n"
+				buf += "		ret = sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code, buf);\n"
+				buf += "		break;\n"
+			elif proto_ident == "iSCSI":
+				buf += "	case SCSI_PROTOCOL_ISCSI:\n"
+				buf += "	default:\n"
+				buf += "		ret = iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code, buf);\n"
+				buf += "		break;\n"
+
+			buf += "	}\n\n"
+			buf += "	return ret;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_get_pr_transport_id(struct se_portal_group *,\n"
+			bufi += "			struct se_node_acl *, struct t10_pr_registration *,\n"
+			bufi += "			int *, unsigned char *);\n"
+
+		if re.search('get_pr_transport_id_len\)\(', fo):
+			buf += "u32 " + fabric_mod_name + "_get_pr_transport_id_len(\n"
+			buf += "	struct se_portal_group *se_tpg,\n"
+			buf += "	struct se_node_acl *se_nacl,\n"
+			buf += "	struct t10_pr_registration *pr_reg,\n"
+			buf += "	int *format_code)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+			buf += "	int ret = 0;\n\n"
+			buf += "	switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+			if proto_ident == "FC":
+				buf += "	case SCSI_PROTOCOL_FCP:\n"
+				buf += "	default:\n"
+				buf += "		ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code);\n"
+				buf += "		break;\n"
+			elif proto_ident == "SAS":
+				buf += "	case SCSI_PROTOCOL_SAS:\n"
+				buf += "	default:\n"
+				buf += "		ret = sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code);\n"
+				buf += "		break;\n"
+			elif proto_ident == "iSCSI":
+				buf += "	case SCSI_PROTOCOL_ISCSI:\n"
+				buf += "	default:\n"
+				buf += "		ret = iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+				buf += "					format_code);\n"
+				buf += "		break;\n"
+
+
+			buf += "	}\n\n"
+			buf += "	return ret;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_get_pr_transport_id_len(struct se_portal_group *,\n"
+			bufi += "			struct se_node_acl *, struct t10_pr_registration *,\n"
+			bufi += "			int *);\n"
+
+		if re.search('parse_pr_out_transport_id\)\(', fo):
+			buf += "char *" + fabric_mod_name + "_parse_pr_out_transport_id(\n"
+			buf += "	struct se_portal_group *se_tpg,\n"
+			buf += "	const char *buf,\n"
+			buf += "	u32 *out_tid_len,\n"
+			buf += "	char **port_nexus_ptr)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+			buf += "				struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+			buf += "	struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+			buf += "	char *tid = NULL;\n\n"
+			buf += "	switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+			if proto_ident == "FC":
+				buf += "	case SCSI_PROTOCOL_FCP:\n"
+				buf += "	default:\n"
+				buf += "		tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+				buf += "					port_nexus_ptr);\n"
+			elif proto_ident == "SAS":
+				buf += "	case SCSI_PROTOCOL_SAS:\n"
+				buf += "	default:\n"
+				buf += "		tid = sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+				buf += "					port_nexus_ptr);\n"
+			elif proto_ident == "iSCSI":
+				buf += "	case SCSI_PROTOCOL_ISCSI:\n"
+				buf += "	default:\n"
+				buf += "		tid = iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+				buf += "					port_nexus_ptr);\n"
+
+			buf += "	}\n\n"
+			buf += "	return tid;\n"
+			buf += "}\n\n"
+			bufi += "char *" + fabric_mod_name + "_parse_pr_out_transport_id(struct se_portal_group *,\n"
+			bufi +=	"			const char *, u32 *, char **);\n"
+
+		if re.search('alloc_fabric_acl\)\(', fo):
+			buf += "struct se_node_acl *" + fabric_mod_name + "_alloc_fabric_acl(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_nacl *nacl;\n\n"
+			buf += "	nacl = kzalloc(sizeof(struct " + fabric_mod_name + "_nacl), GFP_KERNEL);\n"
+			buf += "	if (!(nacl)) {\n"
+			buf += "		printk(KERN_ERR \"Unable to alocate struct " + fabric_mod_name + "_nacl\\n\");\n"
+			buf += "		return NULL;\n"
+			buf += "	}\n\n"
+			buf += "	return &nacl->se_node_acl;\n"
+			buf += "}\n\n"
+			bufi += "struct se_node_acl *" + fabric_mod_name + "_alloc_fabric_acl(struct se_portal_group *);\n"
+
+		if re.search('release_fabric_acl\)\(', fo):
+			buf += "void " + fabric_mod_name + "_release_fabric_acl(\n"
+			buf += "	struct se_portal_group *se_tpg,\n"
+			buf += "	struct se_node_acl *se_nacl)\n"
+			buf += "{\n"
+			buf += "	struct " + fabric_mod_name + "_nacl *nacl = container_of(se_nacl,\n"
+			buf += "			struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+			buf += "	kfree(nacl);\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_release_fabric_acl(struct se_portal_group *,\n"
+			bufi +=	"			struct se_node_acl *);\n"
+
+		if re.search('tpg_get_inst_index\)\(', fo):
+			buf += "u32 " + fabric_mod_name + "_tpg_get_inst_index(struct se_portal_group *se_tpg)\n"
+			buf += "{\n"
+			buf += "	return 1;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_tpg_get_inst_index(struct se_portal_group *);\n"
+
+		if re.search('release_cmd_to_pool', fo):
+			buf += "void " + fabric_mod_name + "_release_cmd(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_release_cmd(struct se_cmd *);\n"
+
+		if re.search('shutdown_session\)\(', fo):
+			buf += "int " + fabric_mod_name + "_shutdown_session(struct se_session *se_sess)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_shutdown_session(struct se_session *);\n"
+
+		if re.search('close_session\)\(', fo):
+			buf += "void " + fabric_mod_name + "_close_session(struct se_session *se_sess)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_close_session(struct se_session *);\n"
+
+		if re.search('stop_session\)\(', fo):
+			buf += "void " + fabric_mod_name + "_stop_session(struct se_session *se_sess, int sess_sleep , int conn_sleep)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_stop_session(struct se_session *, int, int);\n"
+
+		if re.search('fall_back_to_erl0\)\(', fo):
+			buf += "void " + fabric_mod_name + "_reset_nexus(struct se_session *se_sess)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_reset_nexus(struct se_session *);\n"
+
+		if re.search('sess_logged_in\)\(', fo):
+			buf += "int " + fabric_mod_name + "_sess_logged_in(struct se_session *se_sess)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_sess_logged_in(struct se_session *);\n"
+
+		if re.search('sess_get_index\)\(', fo):
+			buf += "u32 " + fabric_mod_name + "_sess_get_index(struct se_session *se_sess)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_sess_get_index(struct se_session *);\n"
+
+		if re.search('write_pending\)\(', fo):
+			buf += "int " + fabric_mod_name + "_write_pending(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_write_pending(struct se_cmd *);\n"
+
+		if re.search('write_pending_status\)\(', fo):
+			buf += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *);\n"
+
+		if re.search('set_default_node_attributes\)\(', fo):
+			buf += "void " + fabric_mod_name + "_set_default_node_attrs(struct se_node_acl *nacl)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_set_default_node_attrs(struct se_node_acl *);\n"
+
+		if re.search('get_task_tag\)\(', fo):
+			buf += "u32 " + fabric_mod_name + "_get_task_tag(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "u32 " + fabric_mod_name + "_get_task_tag(struct se_cmd *);\n"
+
+		if re.search('get_cmd_state\)\(', fo):
+			buf += "int " + fabric_mod_name + "_get_cmd_state(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_get_cmd_state(struct se_cmd *);\n"
+
+		if re.search('new_cmd_failure\)\(', fo):
+			buf += "void " + fabric_mod_name + "_new_cmd_failure(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return;\n"
+			buf += "}\n\n"
+			bufi += "void " + fabric_mod_name + "_new_cmd_failure(struct se_cmd *);\n"
+
+		if re.search('queue_data_in\)\(', fo):
+			buf += "int " + fabric_mod_name + "_queue_data_in(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_queue_data_in(struct se_cmd *);\n"
+
+		if re.search('queue_status\)\(', fo):
+			buf += "int " + fabric_mod_name + "_queue_status(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_queue_status(struct se_cmd *);\n"
+
+		if re.search('queue_tm_rsp\)\(', fo):
+			buf += "int " + fabric_mod_name + "_queue_tm_rsp(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_queue_tm_rsp(struct se_cmd *);\n"
+
+		if re.search('get_fabric_sense_len\)\(', fo):
+			buf += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void);\n"
+
+		if re.search('set_fabric_sense_len\)\(', fo):
+			buf += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *, u32);\n"
+
+		if re.search('is_state_remove\)\(', fo):
+			buf += "int " + fabric_mod_name + "_is_state_remove(struct se_cmd *se_cmd)\n"
+			buf += "{\n"
+			buf += "	return 0;\n"
+			buf += "}\n\n"
+			bufi += "int " + fabric_mod_name + "_is_state_remove(struct se_cmd *);\n"
+
+		if re.search('pack_lun\)\(', fo):
+			buf += "u64 " + fabric_mod_name + "_pack_lun(unsigned int lun)\n"
+			buf += "{\n"
+			buf += "	WARN_ON(lun >= 256);\n"
+			buf += "	/* Caller wants this byte-swapped */\n"
+			buf += "	return cpu_to_le64((lun & 0xff) << 8);\n"
+			buf += "}\n\n"
+			bufi += "u64 " + fabric_mod_name + "_pack_lun(unsigned int);\n"
+
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+
+	ret = pi.write(bufi)
+	if ret:
+		tcm_mod_err("Unable to write fi: " + fi)
+
+	pi.close()
+	return
+
+def tcm_mod_build_kbuild(fabric_mod_dir_var, fabric_mod_name):
+
+	buf = ""
+	f = fabric_mod_dir_var + "/Kbuild"
+	print "Writing file: " + f
+
+	p = open(f, 'w')
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	buf = "EXTRA_CFLAGS += -I$(srctree)/drivers/target/ -I$(srctree)/include/ -I$(srctree)/drivers/scsi/ -I$(srctree)/include/scsi/ -I$(srctree)/drivers/target/" + fabric_mod_name + "\n\n"
+	buf += fabric_mod_name + "-objs			:= " + fabric_mod_name + "_fabric.o \\\n"
+	buf += "					   " + fabric_mod_name + "_configfs.o\n"
+	buf += "obj-$(CONFIG_" + fabric_mod_name.upper() + ")		+= " + fabric_mod_name + ".o\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+	return
+
+def tcm_mod_build_kconfig(fabric_mod_dir_var, fabric_mod_name):
+
+	buf = ""
+	f = fabric_mod_dir_var + "/Kconfig"
+	print "Writing file: " + f
+
+	p = open(f, 'w')
+	if not p:
+		tcm_mod_err("Unable to open file: " + f)
+
+	buf = "config " + fabric_mod_name.upper() + "\n"
+	buf += "	tristate \"" + fabric_mod_name.upper() + " fabric module\"\n"
+	buf += "	depends on TARGET_CORE && CONFIGFS_FS\n"
+	buf += "	default n\n"
+	buf += "	---help---\n"
+	buf += "	Say Y here to enable the " + fabric_mod_name.upper() + " fabric module\n"
+
+	ret = p.write(buf)
+	if ret:
+		tcm_mod_err("Unable to write f: " + f)
+
+	p.close()
+	return
+
+def tcm_mod_add_kbuild(tcm_dir, fabric_mod_name):
+	buf = "obj-$(CONFIG_" + fabric_mod_name.upper() + ")	+= " + fabric_mod_name.lower() + "/\n"
+	kbuild = tcm_dir + "/drivers/target/Kbuild"
+
+	f = open(kbuild, 'a')
+	f.write(buf)
+	f.close()
+	return
+
+def tcm_mod_add_kconfig(tcm_dir, fabric_mod_name):
+	buf = "source \"drivers/target/" + fabric_mod_name.lower() + "/Kconfig\"\n"
+	kconfig = tcm_dir + "/drivers/target/Kconfig"
+
+	f = open(kconfig, 'a')
+	f.write(buf)
+	f.close()
+	return
+
+def main(modname, proto_ident):
+#	proto_ident = "FC"
+#	proto_ident = "SAS"
+#	proto_ident = "iSCSI"
+
+	tcm_dir = os.getcwd();
+	tcm_dir += "/../../"
+	print "tcm_dir: " + tcm_dir
+	fabric_mod_name = modname
+	fabric_mod_dir = tcm_dir + "drivers/target/" + fabric_mod_name
+	print "Set fabric_mod_name: " + fabric_mod_name
+	print "Set fabric_mod_dir: " + fabric_mod_dir
+	print "Using proto_ident: " + proto_ident
+
+	if proto_ident != "FC" and proto_ident != "SAS" and proto_ident != "iSCSI":
+		print "Unsupported proto_ident: " + proto_ident
+		sys.exit(1)
+
+	ret = tcm_mod_create_module_subdir(fabric_mod_dir)
+	if ret:
+		print "tcm_mod_create_module_subdir() failed because module already exists!"
+		sys.exit(1)
+
+	tcm_mod_build_base_includes(proto_ident, fabric_mod_dir, fabric_mod_name)
+	tcm_mod_scan_fabric_ops(tcm_dir)
+	tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir, fabric_mod_name)
+	tcm_mod_build_configfs(proto_ident, fabric_mod_dir, fabric_mod_name)
+	tcm_mod_build_kbuild(fabric_mod_dir, fabric_mod_name)
+	tcm_mod_build_kconfig(fabric_mod_dir, fabric_mod_name)
+
+	input = raw_input("Would you like to add " + fabric_mod_name + "to drivers/target/Kbuild..? [yes,no]: ")
+	if input == "yes" or input == "y":
+		tcm_mod_add_kbuild(tcm_dir, fabric_mod_name)
+
+	input = raw_input("Would you like to add " + fabric_mod_name + "to drivers/target/Kconfig..? [yes,no]: ")
+	if input == "yes" or input == "y":
+		tcm_mod_add_kconfig(tcm_dir, fabric_mod_name)
+
+	return
+
+parser = optparse.OptionParser()
+parser.add_option('-m', '--modulename', help='Module name', dest='modname',
+		action='store', nargs=1, type='string')
+parser.add_option('-p', '--protoident', help='Protocol Ident', dest='protoident',
+		action='store', nargs=1, type='string')
+
+(opts, args) = parser.parse_args()
+
+mandatories = ['modname', 'protoident']
+for m in mandatories:
+	if not opts.__dict__[m]:
+		print "mandatory option is missing\n"
+		parser.print_help()
+		exit(-1)
+
+if __name__ == "__main__":
+
+	main(str(opts.modname), opts.protoident)
diff --git a/Documentation/target/tcm_mod_builder.txt b/Documentation/target/tcm_mod_builder.txt
new file mode 100644
index 000000000000..84533d8e747f
--- /dev/null
+++ b/Documentation/target/tcm_mod_builder.txt
@@ -0,0 +1,145 @@
+>>>>>>>>>> The TCM v4 fabric module script generator <<<<<<<<<<
+
+Greetings all,
+
+This document is intended to be a mini-HOWTO for using the tcm_mod_builder.py
+script to generate a brand new functional TCM v4 fabric .ko module of your very own,
+that once built can be immediately be loaded to start access the new TCM/ConfigFS
+fabric skeleton, by simply using:
+
+	modprobe $TCM_NEW_MOD
+	mkdir -p /sys/kernel/config/target/$TCM_NEW_MOD
+
+This script will create a new drivers/target/$TCM_NEW_MOD/, and will do the following
+
+	*) Generate new API callers for drivers/target/target_core_fabric_configs.c logic
+	   ->make_nodeacl(), ->drop_nodeacl(), ->make_tpg(), ->drop_tpg()
+	   ->make_wwn(), ->drop_wwn().  These are created into $TCM_NEW_MOD/$TCM_NEW_MOD_configfs.c
+	*) Generate basic infrastructure for loading/unloading LKMs and TCM/ConfigFS fabric module
+	   using a skeleton struct target_core_fabric_ops API template.
+	*) Based on user defined T10 Proto_Ident for the new fabric module being built,
+	   the TransportID / Initiator and Target WWPN related handlers for
+	   SPC-3 persistent reservation are automatically generated in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
+	   using drivers/target/target_core_fabric_lib.c logic.
+	*) NOP API calls for all other Data I/O path and fabric dependent attribute logic
+	   in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
+
+tcm_mod_builder.py depends upon the mandatory '-p $PROTO_IDENT' and '-m
+$FABRIC_MOD_name' parameters, and actually running the script looks like:
+
+target:/mnt/sdb/lio-core-2.6.git/Documentation/target# python tcm_mod_builder.py -p iSCSI -m tcm_nab5000
+tcm_dir: /mnt/sdb/lio-core-2.6.git/Documentation/target/../../
+Set fabric_mod_name: tcm_nab5000
+Set fabric_mod_dir:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
+Using proto_ident: iSCSI
+Creating fabric_mod_dir:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_base.h
+Using tcm_mod_scan_fabric_ops:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../include/target/target_core_fabric_ops.h
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.c
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.h
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_configfs.c
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kbuild
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kconfig
+Would you like to add tcm_nab5000to drivers/target/Kbuild..? [yes,no]: yes
+Would you like to add tcm_nab5000to drivers/target/Kconfig..? [yes,no]: yes
+
+At the end of tcm_mod_builder.py. the script will ask to add the following
+line to drivers/target/Kbuild:
+
+	obj-$(CONFIG_TCM_NAB5000)       += tcm_nab5000/
+
+and the same for drivers/target/Kconfig:
+
+	source "drivers/target/tcm_nab5000/Kconfig"
+
+*) Run 'make menuconfig' and select the new CONFIG_TCM_NAB5000 item:
+
+	<M>   TCM_NAB5000 fabric module
+
+*) Build using 'make modules', once completed you will have:
+
+target:/mnt/sdb/lio-core-2.6.git# ls -la drivers/target/tcm_nab5000/
+total 1348
+drwxr-xr-x 2 root root   4096 2010-10-05 03:23 .
+drwxr-xr-x 9 root root   4096 2010-10-05 03:22 ..
+-rw-r--r-- 1 root root    282 2010-10-05 03:22 Kbuild
+-rw-r--r-- 1 root root    171 2010-10-05 03:22 Kconfig
+-rw-r--r-- 1 root root     49 2010-10-05 03:23 modules.order
+-rw-r--r-- 1 root root    738 2010-10-05 03:22 tcm_nab5000_base.h
+-rw-r--r-- 1 root root   9096 2010-10-05 03:22 tcm_nab5000_configfs.c
+-rw-r--r-- 1 root root 191200 2010-10-05 03:23 tcm_nab5000_configfs.o
+-rw-r--r-- 1 root root  40504 2010-10-05 03:23 .tcm_nab5000_configfs.o.cmd
+-rw-r--r-- 1 root root   5414 2010-10-05 03:22 tcm_nab5000_fabric.c
+-rw-r--r-- 1 root root   2016 2010-10-05 03:22 tcm_nab5000_fabric.h
+-rw-r--r-- 1 root root 190932 2010-10-05 03:23 tcm_nab5000_fabric.o
+-rw-r--r-- 1 root root  40713 2010-10-05 03:23 .tcm_nab5000_fabric.o.cmd
+-rw-r--r-- 1 root root 401861 2010-10-05 03:23 tcm_nab5000.ko
+-rw-r--r-- 1 root root    265 2010-10-05 03:23 .tcm_nab5000.ko.cmd
+-rw-r--r-- 1 root root    459 2010-10-05 03:23 tcm_nab5000.mod.c
+-rw-r--r-- 1 root root  23896 2010-10-05 03:23 tcm_nab5000.mod.o
+-rw-r--r-- 1 root root  22655 2010-10-05 03:23 .tcm_nab5000.mod.o.cmd
+-rw-r--r-- 1 root root 379022 2010-10-05 03:23 tcm_nab5000.o
+-rw-r--r-- 1 root root    211 2010-10-05 03:23 .tcm_nab5000.o.cmd
+
+*) Load the new module, create a lun_0 configfs group, and add new TCM Core
+   IBLOCK backstore symlink to port:
+
+target:/mnt/sdb/lio-core-2.6.git# insmod drivers/target/tcm_nab5000.ko
+target:/mnt/sdb/lio-core-2.6.git# mkdir -p /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0
+target:/mnt/sdb/lio-core-2.6.git# cd /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0/
+target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# ln -s /sys/kernel/config/target/core/iblock_0/lvm_test0 nab5000_port
+
+target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# cd -
+target:/mnt/sdb/lio-core-2.6.git# tree /sys/kernel/config/target/nab5000/
+/sys/kernel/config/target/nab5000/
+|-- discovery_auth
+|-- iqn.foo
+|   `-- tpgt_1
+|       |-- acls
+|       |-- attrib
+|       |-- lun
+|       |   `-- lun_0
+|       |       |-- alua_tg_pt_gp
+|       |       |-- alua_tg_pt_offline
+|       |       |-- alua_tg_pt_status
+|       |       |-- alua_tg_pt_write_md
+|	|	`-- nab5000_port -> ../../../../../../target/core/iblock_0/lvm_test0
+|       |-- np
+|       `-- param
+`-- version
+
+target:/mnt/sdb/lio-core-2.6.git# lsmod
+Module                  Size  Used by
+tcm_nab5000             3935  4
+iscsi_target_mod      193211  0
+target_core_stgt        8090  0
+target_core_pscsi      11122  1
+target_core_file        9172  2
+target_core_iblock      9280  1
+target_core_mod       228575  31
+tcm_nab5000,iscsi_target_mod,target_core_stgt,target_core_pscsi,target_core_file,target_core_iblock
+libfc                  73681  0
+scsi_debug             56265  0
+scsi_tgt                8666  1 target_core_stgt
+configfs               20644  2 target_core_mod
+
+----------------------------------------------------------------------
+
+Future TODO items:
+
+	*) Add more T10 proto_idents
+	*) Make tcm_mod_dump_fabric_ops() smarter and generate function pointer
+	   defs directly from include/target/target_core_fabric_ops.h:struct target_core_fabric_ops
+	   structure members.
+
+October 5th, 2010
+Nicholas A. Bellinger <nab@linux-iscsi.org>
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index cb3d15bc1aeb..b61e46f449aa 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -278,3 +278,15 @@ method, the sys I/F structure will be built like this:
     |---name:			acpitz
     |---temp1_input:		37000
     |---temp1_crit:		100000
+
+4. Event Notification
+
+The framework includes a simple notification mechanism, in the form of a
+netlink event. Netlink socket initialization is done during the _init_
+of the framework. Drivers which intend to use the notification mechanism
+just need to call generate_netlink_event() with two arguments viz
+(originator, event). Typically the originator will be an integer assigned
+to a thermal_zone_device when it registers itself with the framework. The
+event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL,
+THERMAL_DEV_FAULT}. Notification can be sent when the current temperature
+crosses any of the configured thresholds.
diff --git a/Documentation/video4linux/v4l2-controls.txt b/Documentation/video4linux/v4l2-controls.txt
index 8773778d23fc..881e7f44491b 100644
--- a/Documentation/video4linux/v4l2-controls.txt
+++ b/Documentation/video4linux/v4l2-controls.txt
@@ -285,6 +285,9 @@ implement g_volatile_ctrl like this:
 The 'new value' union is not used in g_volatile_ctrl. In general controls
 that need to implement g_volatile_ctrl are read-only controls.
 
+Note that if one or more controls in a control cluster are marked as volatile,
+then all the controls in the cluster are seen as volatile.
+
 To mark a control as volatile you have to set the is_volatile flag:
 
 	ctrl = v4l2_ctrl_new_std(&sd->ctrl_handler, ...);
@@ -462,6 +465,15 @@ pointer to the v4l2_ctrl_ops struct that is used for that cluster.
 Obviously, all controls in the cluster array must be initialized to either
 a valid control or to NULL.
 
+In rare cases you might want to know which controls of a cluster actually
+were set explicitly by the user. For this you can check the 'is_new' flag of
+each control. For example, in the case of a volume/mute cluster the 'is_new'
+flag of the mute control would be set if the user called VIDIOC_S_CTRL for
+mute only. If the user would call VIDIOC_S_EXT_CTRLS for both mute and volume
+controls, then the 'is_new' flag would be 1 for both controls.
+
+The 'is_new' flag is always 1 when called from v4l2_ctrl_handler_setup().
+
 
 VIDIOC_LOG_STATUS Support
 =========================
diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
new file mode 100644
index 000000000000..0924aaca3302
--- /dev/null
+++ b/Documentation/vm/transhuge.txt
@@ -0,0 +1,298 @@
+= Transparent Hugepage Support =
+
+== Objective ==
+
+Performance critical computing applications dealing with large memory
+working sets are already running on top of libhugetlbfs and in turn
+hugetlbfs. Transparent Hugepage Support is an alternative means of
+using huge pages for the backing of virtual memory with huge pages
+that supports the automatic promotion and demotion of page sizes and
+without the shortcomings of hugetlbfs.
+
+Currently it only works for anonymous memory mappings but in the
+future it can expand over the pagecache layer starting with tmpfs.
+
+The reason applications are running faster is because of two
+factors. The first factor is almost completely irrelevant and it's not
+of significant interest because it'll also have the downside of
+requiring larger clear-page copy-page in page faults which is a
+potentially negative effect. The first factor consists in taking a
+single page fault for each 2M virtual region touched by userland (so
+reducing the enter/exit kernel frequency by a 512 times factor). This
+only matters the first time the memory is accessed for the lifetime of
+a memory mapping. The second long lasting and much more important
+factor will affect all subsequent accesses to the memory for the whole
+runtime of the application. The second factor consist of two
+components: 1) the TLB miss will run faster (especially with
+virtualization using nested pagetables but almost always also on bare
+metal without virtualization) and 2) a single TLB entry will be
+mapping a much larger amount of virtual memory in turn reducing the
+number of TLB misses. With virtualization and nested pagetables the
+TLB can be mapped of larger size only if both KVM and the Linux guest
+are using hugepages but a significant speedup already happens if only
+one of the two is using hugepages just because of the fact the TLB
+miss is going to run faster.
+
+== Design ==
+
+- "graceful fallback": mm components which don't have transparent
+  hugepage knowledge fall back to breaking a transparent hugepage and
+  working on the regular pages and their respective regular pmd/pte
+  mappings
+
+- if a hugepage allocation fails because of memory fragmentation,
+  regular pages should be gracefully allocated instead and mixed in
+  the same vma without any failure or significant delay and without
+  userland noticing
+
+- if some task quits and more hugepages become available (either
+  immediately in the buddy or through the VM), guest physical memory
+  backed by regular pages should be relocated on hugepages
+  automatically (with khugepaged)
+
+- it doesn't require memory reservation and in turn it uses hugepages
+  whenever possible (the only possible reservation here is kernelcore=
+  to avoid unmovable pages to fragment all the memory but such a tweak
+  is not specific to transparent hugepage support and it's a generic
+  feature that applies to all dynamic high order allocations in the
+  kernel)
+
+- this initial support only offers the feature in the anonymous memory
+  regions but it'd be ideal to move it to tmpfs and the pagecache
+  later
+
+Transparent Hugepage Support maximizes the usefulness of free memory
+if compared to the reservation approach of hugetlbfs by allowing all
+unused memory to be used as cache or other movable (or even unmovable
+entities). It doesn't require reservation to prevent hugepage
+allocation failures to be noticeable from userland. It allows paging
+and all other advanced VM features to be available on the
+hugepages. It requires no modifications for applications to take
+advantage of it.
+
+Applications however can be further optimized to take advantage of
+this feature, like for example they've been optimized before to avoid
+a flood of mmap system calls for every malloc(4k). Optimizing userland
+is by far not mandatory and khugepaged already can take care of long
+lived page allocations even for hugepage unaware applications that
+deals with large amounts of memory.
+
+In certain cases when hugepages are enabled system wide, application
+may end up allocating more memory resources. An application may mmap a
+large region but only touch 1 byte of it, in that case a 2M page might
+be allocated instead of a 4k page for no good. This is why it's
+possible to disable hugepages system-wide and to only have them inside
+MADV_HUGEPAGE madvise regions.
+
+Embedded systems should enable hugepages only inside madvise regions
+to eliminate any risk of wasting any precious byte of memory and to
+only run faster.
+
+Applications that gets a lot of benefit from hugepages and that don't
+risk to lose memory by using hugepages, should use
+madvise(MADV_HUGEPAGE) on their critical mmapped regions.
+
+== sysfs ==
+
+Transparent Hugepage Support can be entirely disabled (mostly for
+debugging purposes) or only enabled inside MADV_HUGEPAGE regions (to
+avoid the risk of consuming more memory resources) or enabled system
+wide. This can be achieved with one of:
+
+echo always >/sys/kernel/mm/transparent_hugepage/enabled
+echo madvise >/sys/kernel/mm/transparent_hugepage/enabled
+echo never >/sys/kernel/mm/transparent_hugepage/enabled
+
+It's also possible to limit defrag efforts in the VM to generate
+hugepages in case they're not immediately free to madvise regions or
+to never try to defrag memory and simply fallback to regular pages
+unless hugepages are immediately available. Clearly if we spend CPU
+time to defrag memory, we would expect to gain even more by the fact
+we use hugepages later instead of regular pages. This isn't always
+guaranteed, but it may be more likely in case the allocation is for a
+MADV_HUGEPAGE region.
+
+echo always >/sys/kernel/mm/transparent_hugepage/defrag
+echo madvise >/sys/kernel/mm/transparent_hugepage/defrag
+echo never >/sys/kernel/mm/transparent_hugepage/defrag
+
+khugepaged will be automatically started when
+transparent_hugepage/enabled is set to "always" or "madvise, and it'll
+be automatically shutdown if it's set to "never".
+
+khugepaged runs usually at low frequency so while one may not want to
+invoke defrag algorithms synchronously during the page faults, it
+should be worth invoking defrag at least in khugepaged. However it's
+also possible to disable defrag in khugepaged:
+
+echo yes >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag
+echo no >/sys/kernel/mm/transparent_hugepage/khugepaged/defrag
+
+You can also control how many pages khugepaged should scan at each
+pass:
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/pages_to_scan
+
+and how many milliseconds to wait in khugepaged between each pass (you
+can set this to 0 to run khugepaged at 100% utilization of one core):
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/scan_sleep_millisecs
+
+and how many milliseconds to wait in khugepaged if there's an hugepage
+allocation failure to throttle the next allocation attempt.
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/alloc_sleep_millisecs
+
+The khugepaged progress can be seen in the number of pages collapsed:
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/pages_collapsed
+
+for each pass:
+
+/sys/kernel/mm/transparent_hugepage/khugepaged/full_scans
+
+== Boot parameter ==
+
+You can change the sysfs boot time defaults of Transparent Hugepage
+Support by passing the parameter "transparent_hugepage=always" or
+"transparent_hugepage=madvise" or "transparent_hugepage=never"
+(without "") to the kernel command line.
+
+== Need of application restart ==
+
+The transparent_hugepage/enabled values only affect future
+behavior. So to make them effective you need to restart any
+application that could have been using hugepages. This also applies to
+the regions registered in khugepaged.
+
+== get_user_pages and follow_page ==
+
+get_user_pages and follow_page if run on a hugepage, will return the
+head or tail pages as usual (exactly as they would do on
+hugetlbfs). Most gup users will only care about the actual physical
+address of the page and its temporary pinning to release after the I/O
+is complete, so they won't ever notice the fact the page is huge. But
+if any driver is going to mangle over the page structure of the tail
+page (like for checking page->mapping or other bits that are relevant
+for the head page and not the tail page), it should be updated to jump
+to check head page instead (while serializing properly against
+split_huge_page() to avoid the head and tail pages to disappear from
+under it, see the futex code to see an example of that, hugetlbfs also
+needed special handling in futex code for similar reasons).
+
+NOTE: these aren't new constraints to the GUP API, and they match the
+same constrains that applies to hugetlbfs too, so any driver capable
+of handling GUP on hugetlbfs will also work fine on transparent
+hugepage backed mappings.
+
+In case you can't handle compound pages if they're returned by
+follow_page, the FOLL_SPLIT bit can be specified as parameter to
+follow_page, so that it will split the hugepages before returning
+them. Migration for example passes FOLL_SPLIT as parameter to
+follow_page because it's not hugepage aware and in fact it can't work
+at all on hugetlbfs (but it instead works fine on transparent
+hugepages thanks to FOLL_SPLIT). migration simply can't deal with
+hugepages being returned (as it's not only checking the pfn of the
+page and pinning it during the copy but it pretends to migrate the
+memory in regular page sizes and with regular pte/pmd mappings).
+
+== Optimizing the applications ==
+
+To be guaranteed that the kernel will map a 2M page immediately in any
+memory region, the mmap region has to be hugepage naturally
+aligned. posix_memalign() can provide that guarantee.
+
+== Hugetlbfs ==
+
+You can use hugetlbfs on a kernel that has transparent hugepage
+support enabled just fine as always. No difference can be noted in
+hugetlbfs other than there will be less overall fragmentation. All
+usual features belonging to hugetlbfs are preserved and
+unaffected. libhugetlbfs will also work fine as usual.
+
+== Graceful fallback ==
+
+Code walking pagetables but unware about huge pmds can simply call
+split_huge_page_pmd(mm, pmd) where the pmd is the one returned by
+pmd_offset. It's trivial to make the code transparent hugepage aware
+by just grepping for "pmd_offset" and adding split_huge_page_pmd where
+missing after pmd_offset returns the pmd. Thanks to the graceful
+fallback design, with a one liner change, you can avoid to write
+hundred if not thousand of lines of complex code to make your code
+hugepage aware.
+
+If you're not walking pagetables but you run into a physical hugepage
+but you can't handle it natively in your code, you can split it by
+calling split_huge_page(page). This is what the Linux VM does before
+it tries to swapout the hugepage for example.
+
+Example to make mremap.c transparent hugepage aware with a one liner
+change:
+
+diff --git a/mm/mremap.c b/mm/mremap.c
+--- a/mm/mremap.c
++++ b/mm/mremap.c
+@@ -41,6 +41,7 @@ static pmd_t *get_old_pmd(struct mm_stru
+		return NULL;
+
+	pmd = pmd_offset(pud, addr);
++	split_huge_page_pmd(mm, pmd);
+	if (pmd_none_or_clear_bad(pmd))
+		return NULL;
+
+== Locking in hugepage aware code ==
+
+We want as much code as possible hugepage aware, as calling
+split_huge_page() or split_huge_page_pmd() has a cost.
+
+To make pagetable walks huge pmd aware, all you need to do is to call
+pmd_trans_huge() on the pmd returned by pmd_offset. You must hold the
+mmap_sem in read (or write) mode to be sure an huge pmd cannot be
+created from under you by khugepaged (khugepaged collapse_huge_page
+takes the mmap_sem in write mode in addition to the anon_vma lock). If
+pmd_trans_huge returns false, you just fallback in the old code
+paths. If instead pmd_trans_huge returns true, you have to take the
+mm->page_table_lock and re-run pmd_trans_huge. Taking the
+page_table_lock will prevent the huge pmd to be converted into a
+regular pmd from under you (split_huge_page can run in parallel to the
+pagetable walk). If the second pmd_trans_huge returns false, you
+should just drop the page_table_lock and fallback to the old code as
+before. Otherwise you should run pmd_trans_splitting on the pmd. In
+case pmd_trans_splitting returns true, it means split_huge_page is
+already in the middle of splitting the page. So if pmd_trans_splitting
+returns true it's enough to drop the page_table_lock and call
+wait_split_huge_page and then fallback the old code paths. You are
+guaranteed by the time wait_split_huge_page returns, the pmd isn't
+huge anymore. If pmd_trans_splitting returns false, you can proceed to
+process the huge pmd and the hugepage natively. Once finished you can
+drop the page_table_lock.
+
+== compound_lock, get_user_pages and put_page ==
+
+split_huge_page internally has to distribute the refcounts in the head
+page to the tail pages before clearing all PG_head/tail bits from the
+page structures. It can do that easily for refcounts taken by huge pmd
+mappings. But the GUI API as created by hugetlbfs (that returns head
+and tail pages if running get_user_pages on an address backed by any
+hugepage), requires the refcount to be accounted on the tail pages and
+not only in the head pages, if we want to be able to run
+split_huge_page while there are gup pins established on any tail
+page. Failure to be able to run split_huge_page if there's any gup pin
+on any tail page, would mean having to split all hugepages upfront in
+get_user_pages which is unacceptable as too many gup users are
+performance critical and they must work natively on hugepages like
+they work natively on hugetlbfs already (hugetlbfs is simpler because
+hugetlbfs pages cannot be splitted so there wouldn't be requirement of
+accounting the pins on the tail pages for hugetlbfs). If we wouldn't
+account the gup refcounts on the tail pages during gup, we won't know
+anymore which tail page is pinned by gup and which is not while we run
+split_huge_page. But we still have to add the gup pin to the head page
+too, to know when we can free the compound page in case it's never
+splitted during its lifetime. That requires changing not just
+get_page, but put_page as well so that when put_page runs on a tail
+page (and only on a tail page) it will find its respective head page,
+and then it will decrease the head page refcount in addition to the
+tail page refcount. To obtain a head page reliably and to decrease its
+refcount without race conditions, put_page has to serialize against
+__split_huge_page_refcount using a special per-page lock called
+compound_lock.