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Author SHA1 Message Date
Matthew Wilcox
25726bc157 dax: add dax_zero_page_range 
This new function allows us to support hole-punch for DAX files by zeroing
a partial page, as opposed to the dax_truncate_page() function which can
only truncate to the end of the page.  Reimplement dax_truncate_page() to
call dax_zero_page_range().

[ross.zwisler@linux.intel.com: ported to 3.13-rc2]
[akpm@linux-foundation.org: fix typos in comments]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-16 17:56:04 -08:00
Matthew Wilcox
9c3ce9ec58 ext2: get rid of most mentions of XIP in ext2 
To help people transition, accept the 'xip' mount option (and report it in
/proc/mounts), but print a message encouraging people to switch over to
the 'dax' option.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-16 17:56:04 -08:00
Matthew Wilcox
e748dcd095 vfs: remove get_xip_mem 
All callers of get_xip_mem() are now gone.  Remove checks for it,
initialisers of it, documentation of it and the only implementation of it.
 Also remove mm/filemap_xip.c as it is now empty.  Also remove
documentation of the long-gone get_xip_page().

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-16 17:56:03 -08:00
Matthew Wilcox
95ec8daba3 dax: replace XIP documentation with DAX documentation 
Based on the original XIP documentation, this documents the current state
of affairs, and includes instructions on how users can enable DAX if their
devices and kernel support it.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-16 17:56:03 -08:00
Linus Torvalds
a9724125ad TTY/Serial driver patches for 3.20-rc1 
Here's the big tty/serial driver update for 3.20-rc1.  Nothing huge
 here, just lots of driver updates and some core tty layer fixes as well.
 All have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver patches from Greg KH:
 "Here's the big tty/serial driver update for 3.20-rc1.  Nothing huge
  here, just lots of driver updates and some core tty layer fixes as
  well.  All have been in linux-next with no reported issues"

* tag 'tty-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (119 commits)
  serial: 8250: Fix UART_BUG_TXEN workaround
  serial: driver for ETRAX FS UART
  tty: remove unused variable sprop
  serial: of-serial: fetch line number from DT
  serial: samsung: earlycon support depends on CONFIG_SERIAL_SAMSUNG_CONSOLE
  tty/serial: serial8250_set_divisor() can be static
  tty/serial: Add Spreadtrum sc9836-uart driver support
  Documentation: DT: Add bindings for Spreadtrum SoC Platform
  serial: samsung: remove redundant interrupt enabling
  tty: Remove external interface for tty_set_termios()
  serial: omap: Fix RTS handling
  serial: 8250_omap: Use UPSTAT_AUTORTS for RTS handling
  serial: core: Rework hw-assisted flow control support
  tty/serial: 8250_early: Add support for PXA UARTs
  tty/serial: of_serial: add support for PXA/MMP uarts
  tty/serial: of_serial: add DT alias ID handling
  serial: 8250: Prevent concurrent updates to shadow registers
  serial: 8250: Use canary to restart console after suspend
  serial: 8250: Refactor XR17V35X divisor calculation
  serial: 8250: Refactor divisor programming
  ...
 2015-02-15 11:37:02 -08:00
Linus Torvalds
46f7b63556 Staging drivers patches for 3.20-rc1 
Here's the big staging driver tree update for 3.20-rc1.  Lots of little
 things in here, adding up to lots of overall cleanups.  The IIO driver
 updates are also in here as they cross the staging tree boundry a lot.
 I2O has moved into staging as well, as a plan to drop it from the tree
 eventually as that's a dead subsystem.
 
 All of this has been in linux-next with no reported issues for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging drivers patches from Greg KH:
 "Here's the big staging driver tree update for 3.20-rc1.

  Lots of little things in here, adding up to lots of overall cleanups.
  The IIO driver updates are also in here as they cross the staging tree
  boundry a lot.  I2O has moved into staging as well, as a plan to drop
  it from the tree eventually as that's a dead subsystem.

  All of this has been in linux-next with no reported issues for a
  while"

* tag 'staging-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (740 commits)
  staging: lustre: lustre: libcfs: define symbols as static
  staging: rtl8712: Do coding style cleanup
  staging: lustre: make obd_updatemax_lock static
  staging: rtl8188eu: core: switch with redundant cases
  staging: rtl8188eu: odm: conditional setting with no effect
  staging: rtl8188eu: odm: condition with no effect
  staging: ft1000: fix braces warning
  staging: sm7xxfb: fix remaining CamelCase
  staging: sm7xxfb: fix CamelCase
  staging: rtl8723au: multiple condition with no effect - if identical to else
  staging: sm7xxfb: make smtc_scr_info static
  staging/lustre/mdc: Initialize req in mdc_enqueue for !it case
  staging/lustre/clio: Do not allow group locks with gid 0
  staging/lustre/llite: don't add to page cache upon failure
  staging/lustre/llite: Add exception entry check after radix_tree
  staging/lustre/libcfs: protect kkuc_groups from write access
  staging/lustre/fld: refer to MDT0 for fld lookup in some cases
  staging/lustre/llite: Solve a race to access lli_has_smd in read case
  staging/lustre/ptlrpc: hold rq_lock when modify rq_flags
  staging/lustre/lnet: portal spreading rotor should be unsigned
  ...
 2015-02-15 11:30:39 -08:00
Linus Torvalds
4ba63072b9 Char / Misc patches for 3.20-rc1 
Here's the big char/misc driver update for 3.20-rc1.
 
 Lots of little things in here, all described in the changelog.  Nothing
 major or unusual, except maybe the binder selinux stuff, which was all
 acked by the proper selinux people and they thought it best to come
 through this tree.
 
 All of this has been in linux-next with no reported issues for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc patches from Greg KH:
 "Here's the big char/misc driver update for 3.20-rc1.

  Lots of little things in here, all described in the changelog.
  Nothing major or unusual, except maybe the binder selinux stuff, which
  was all acked by the proper selinux people and they thought it best to
  come through this tree.

  All of this has been in linux-next with no reported issues for a while"

* tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (90 commits)
  coresight: fix function etm_writel_cp14() parameter order
  coresight-etm: remove check for unknown Kconfig macro
  coresight: fixing CPU hwid lookup in device tree
  coresight: remove the unnecessary function coresight_is_bit_set()
  coresight: fix the debug AMBA bus name
  coresight: remove the extra spaces
  coresight: fix the link between orphan connection and newly added device
  coresight: remove the unnecessary replicator property
  coresight: fix the replicator subtype value
  pdfdocs: Fix 'make pdfdocs' failure for 'uio-howto.tmpl'
  mcb: Fix error path of mcb_pci_probe
  virtio/console: verify device has config space
  ti-st: clean up data types (fix harmless memory corruption)
  mei: me: release hw from reset only during the reset flow
  mei: mask interrupt set bit on clean reset bit
  extcon: max77693: Constify struct regmap_config
  extcon: adc-jack: Release IIO channel on driver remove
  extcon: Remove duplicated include from extcon-class.c
  Drivers: hv: vmbus: hv_process_timer_expiration() can be static
  Drivers: hv: vmbus: serialize Offer and Rescind offer
  ...
 2015-02-15 10:48:44 -08:00
Linus Torvalds
e29876723f USB patches for 3.20-rc1 
Here's the big pull request for the USB driver tree for 3.20-rc1.
 
 Nothing major happening here, just lots of gadget driver updates, new
 device ids, and a bunch of cleanups.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB patches from Greg KH:
 "Here's the big pull request for the USB driver tree for 3.20-rc1.

  Nothing major happening here, just lots of gadget driver updates, new
  device ids, and a bunch of cleanups.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (299 commits)
  usb: musb: fix device hotplug behind hub
  usb: dwc2: Fix a bug in reading the endpoint directions from reg.
  staging: emxx_udc: fix the build error
  usb: Retry port status check on resume to work around RH bugs
  Revert "usb: Reset USB-3 devices on USB-3 link bounce"
  uhci-hub: use HUB_CHAR_*
  usb: kconfig: replace PPC_OF with PPC
  ehci-pci: disable for Intel MID platforms (update)
  usb: gadget: Kconfig: use bool instead of boolean
  usb: musb: blackfin: remove incorrect __exit_p()
  USB: fix use-after-free bug in usb_hcd_unlink_urb()
  ehci-pci: disable for Intel MID platforms
  usb: host: pci_quirks: joing string literals
  USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd)
  USB: usbfs: allow URBs to be reaped after disconnection
  cdc-acm: kill unnecessary messages
  cdc-acm: add sanity checks
  usb: phy: phy-generic: Fix USB PHY gpio reset
  usb: dwc2: fix USB core dependencies
  usb: renesas_usbhs: fix NULL pointer dereference in dma_release_channel()
  ...
 2015-02-15 10:24:55 -08:00
Gregory CLEMENT
bb624047de rtc: armada38x: add the device tree binding documentation 
The Marvell Armada 38x SoCs contains an RTC which differs from the RTC
used in the other mvebu SoCs until now.  This forth version of the patch
set adds support for this new IP and enable it in the Device Tree of the
Armada 38x SoC.

This patch (of 5):

The Armada 38x SoCs come with a new RTC which differs from the one used in
the other mvebu SoCs until now.  This patch describes the binding of this
RTC.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Arnaud Ebalard <arno@natisbad.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Boris BREZILLON <boris.brezillon@free-electrons.com>
Cc: Lior Amsalem <alior@marvell.com>
Cc: Tawfik Bayouk <tawfik@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:43 -08:00
Arnaud Ebalard
0b2f6228b2 rtc: add support for Abracon AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip 
This patch adds support for Abracon AB-RTCMC-32.768kHz-B5ZE-S3
RTC/Calendar module w/ I2C interface.

This support includes RTC time reading and setting, Alarm (1 minute
accuracy) reading and setting, and battery low detection.  The device also
supports frequency adjustment and two timers but those features are
currently not implemented in this driver.  Due to alarm accuracy
limitation (and current lack of timer support in the driver), UIE mode is
not supported.

Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Peter Huewe <peter.huewe@infineon.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robherring2@gmail.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Landley <rob@landley.net>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:43 -08:00
Arnaud Ebalard
446810f2dd of: add vendor prefix for Abracon Corporation 
This series adds support for Abracon AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC
chip. Unlike many RTC chips, it includes an internal oscillator which
spares room on the PCB. It also has some interesting features, like
battery low detection (which the driver in this series supports). The
only small "limitation" (mainly due to what RTC subsystem expects from
RTC chips) is the fact that its alarm is accurate to the second. This
series provides a solution (described below) for that limitation using
another mechanism of the chip.

I decided to split support between three different patches for
this v0:

- Patch 1/3: it simply references Abracon Corporation in vendor-prefixes
  documentation file. As Abracon has no NASDAQ ticker symbol; I have
  decided to use "abcn" (I initially started my work w/ "ab" but later
  changed for "abcn" which looked more meaningful)
- Patch 2/3: it adds initial support for the chip and provides the
  ability to read/write time and also read/write alarm. As the alarm
  the chip provides is accurate to the minute, the support provided
  by this patch also has this limitation (e.g. UIE mode is not
  supported).
- Patch 3/3: the chip supports a watchdog timer which can be used to
  extend the alarm mechanism in patch 2/3 in order to provide support
  for alarms under one minute (e.g. support UIE mode). In practice,
  the logic I implemented is to use the watchdog timer for alarms which
  are at most 4 minutes in the future and use the common alarm mechanism
  for alarms which are set to larger values. With that additional patch
  the device fully passes the rtctest.c program.

I decided to split the driver between two patches (2 and 3 of 3) in
order to ease review: patch 2 should be pretty straightforward to read
for someone familiar w/ RTC subsystem. Patch 3 only extends what is in
patch 2 regarding alarms.

This patch (of 3):

Documentation/devicetree/bindings/vendor-prefixes.txt: add vendor prefix
for Abracon Corporation

Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Peter Huewe <peter.huewe@infineon.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robherring2@gmail.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Landley <rob@landley.net>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:43 -08:00
Arnaud Ebalard
298ff0122a rtc: rtc-isl12057: add isil,irq2-can-wakeup-machine property for in-tree users 
Current in-tree users of ISL12057 RTC chip (NETGEAR ReadyNAS 102, 104 and
2120) do not have the IRQ#2 pin of the chip (associated w/ the Alarm1
mechanism) connected to their SoC, but to a PMIC (TPS65251 FWIW).  This
specific hardware configuration allows the NAS to wake up when the alarms
rings.

Recently introduced alarm support for ISL12057 relies on the provision of
an "interrupts" property in system .dts file, which previous three users
will never get.  For that reason, alarm support on those devices is not
function.  To support this use case, this patch adds a new DT property for
ISL12057 (isil,irq2-can-wakeup-machine) to indicate that the chip is
capable of waking up the device using its IRQ#2 pin (even though it does
not have its IRQ#2 pin connected directly to the SoC).

This specific configuration was tested on a ReadyNAS 102 by setting an
alarm, powering off the device and see it reboot as expected when the
alarm rang w/:

  # echo `date '+%s' -d '+ 1 minutes'` > /sys/class/rtc/rtc0/wakealarm
  # shutdown -h now

As a side note, the ISL12057 remains in the list of trivial devices,
because the property is not per se required by the device to work but can
help handle system w/ specific requirements.  In exchange, the new feature
is described in details in a specific documentation file.

Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Peter Huewe <peter.huewe@infineon.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Darshana Padmadas <darshanapadmadas@gmail.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Landley <rob@landley.net>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:42 -08:00
Joshua Clayton
3fc70077e6 drivers/rtc/rtc-pcf2123.c: add support for devicetree 
Add compatible string "nxp,rtc-pcf2123"
Document the binding

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:42 -08:00
Andrey Ryabinin
bebf56a1b1 kasan: enable instrumentation of global variables 
This feature let us to detect accesses out of bounds of global variables.
This will work as for globals in kernel image, so for globals in modules.
Currently this won't work for symbols in user-specified sections (e.g.
__init, __read_mostly, ...)

The idea of this is simple.  Compiler increases each global variable by
redzone size and add constructors invoking __asan_register_globals()
function.  Information about global variable (address, size, size with
redzone ...) passed to __asan_register_globals() so we could poison
variable's redzone.

This patch also forces module_alloc() to return 8*PAGE_SIZE aligned
address making shadow memory handling (
kasan_module_alloc()/kasan_module_free() ) more simple.  Such alignment
guarantees that each shadow page backing modules address space correspond
to only one module_alloc() allocation.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:42 -08:00
Andrey Ryabinin
ef7f0d6a6c x86_64: add KASan support 
This patch adds arch specific code for kernel address sanitizer.

16TB of virtual addressed used for shadow memory.  It's located in range
[ffffec0000000000 - fffffc0000000000] between vmemmap and %esp fixup
stacks.

At early stage we map whole shadow region with zero page.  Latter, after
pages mapped to direct mapping address range we unmap zero pages from
corresponding shadow (see kasan_map_shadow()) and allocate and map a real
shadow memory reusing vmemmap_populate() function.

Also replace __pa with __pa_nodebug before shadow initialized.  __pa with
CONFIG_DEBUG_VIRTUAL=y make external function call (__phys_addr)
__phys_addr is instrumented, so __asan_load could be called before shadow
area initialized.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:41 -08:00
Andrey Ryabinin
0b24becc81 kasan: add kernel address sanitizer infrastructure 
Kernel Address sanitizer (KASan) is a dynamic memory error detector.  It
provides fast and comprehensive solution for finding use-after-free and
out-of-bounds bugs.

KASAN uses compile-time instrumentation for checking every memory access,
therefore GCC > v4.9.2 required.  v4.9.2 almost works, but has issues with
putting symbol aliases into the wrong section, which breaks kasan
instrumentation of globals.

This patch only adds infrastructure for kernel address sanitizer.  It's
not available for use yet.  The idea and some code was borrowed from [1].

Basic idea:

The main idea of KASAN is to use shadow memory to record whether each byte
of memory is safe to access or not, and use compiler's instrumentation to
check the shadow memory on each memory access.

Address sanitizer uses 1/8 of the memory addressable in kernel for shadow
memory and uses direct mapping with a scale and offset to translate a
memory address to its corresponding shadow address.

Here is function to translate address to corresponding shadow address:

     unsigned long kasan_mem_to_shadow(unsigned long addr)
     {
                return (addr >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET;
     }

where KASAN_SHADOW_SCALE_SHIFT = 3.

So for every 8 bytes there is one corresponding byte of shadow memory.
The following encoding used for each shadow byte: 0 means that all 8 bytes
of the corresponding memory region are valid for access; k (1 <= k <= 7)
means that the first k bytes are valid for access, and other (8 - k) bytes
are not; Any negative value indicates that the entire 8-bytes are
inaccessible.  Different negative values used to distinguish between
different kinds of inaccessible memory (redzones, freed memory) (see
mm/kasan/kasan.h).

To be able to detect accesses to bad memory we need a special compiler.
Such compiler inserts a specific function calls (__asan_load*(addr),
__asan_store*(addr)) before each memory access of size 1, 2, 4, 8 or 16.

These functions check whether memory region is valid to access or not by
checking corresponding shadow memory.  If access is not valid an error
printed.

Historical background of the address sanitizer from Dmitry Vyukov:

	"We've developed the set of tools, AddressSanitizer (Asan),
	ThreadSanitizer and MemorySanitizer, for user space. We actively use
	them for testing inside of Google (continuous testing, fuzzing,
	running prod services). To date the tools have found more than 10'000
	scary bugs in Chromium, Google internal codebase and various
	open-source projects (Firefox, OpenSSL, gcc, clang, ffmpeg, MySQL and
	lots of others): [2] [3] [4].
	The tools are part of both gcc and clang compilers.

	We have not yet done massive testing under the Kernel AddressSanitizer
	(it's kind of chicken and egg problem, you need it to be upstream to
	start applying it extensively). To date it has found about 50 bugs.
	Bugs that we've found in upstream kernel are listed in [5].
	We've also found ~20 bugs in out internal version of the kernel. Also
	people from Samsung and Oracle have found some.

	[...]

	As others noted, the main feature of AddressSanitizer is its
	performance due to inline compiler instrumentation and simple linear
	shadow memory. User-space Asan has ~2x slowdown on computational
	programs and ~2x memory consumption increase. Taking into account that
	kernel usually consumes only small fraction of CPU and memory when
	running real user-space programs, I would expect that kernel Asan will
	have ~10-30% slowdown and similar memory consumption increase (when we
	finish all tuning).

	I agree that Asan can well replace kmemcheck. We have plans to start
	working on Kernel MemorySanitizer that finds uses of unitialized
	memory. Asan+Msan will provide feature-parity with kmemcheck. As
	others noted, Asan will unlikely replace debug slab and pagealloc that
	can be enabled at runtime. Asan uses compiler instrumentation, so even
	if it is disabled, it still incurs visible overheads.

	Asan technology is easily portable to other architectures. Compiler
	instrumentation is fully portable. Runtime has some arch-dependent
	parts like shadow mapping and atomic operation interception. They are
	relatively easy to port."

Comparison with other debugging features:
========================================

KMEMCHECK:

  - KASan can do almost everything that kmemcheck can.  KASan uses
    compile-time instrumentation, which makes it significantly faster than
    kmemcheck.  The only advantage of kmemcheck over KASan is detection of
    uninitialized memory reads.

    Some brief performance testing showed that kasan could be
    x500-x600 times faster than kmemcheck:

$ netperf -l 30
		MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost (127.0.0.1) port 0 AF_INET
		Recv   Send    Send
		Socket Socket  Message  Elapsed
		Size   Size    Size     Time     Throughput
		bytes  bytes   bytes    secs.    10^6bits/sec

no debug:	87380  16384  16384    30.00    41624.72

kasan inline:	87380  16384  16384    30.00    12870.54

kasan outline:	87380  16384  16384    30.00    10586.39

kmemcheck: 	87380  16384  16384    30.03      20.23

  - Also kmemcheck couldn't work on several CPUs.  It always sets
    number of CPUs to 1.  KASan doesn't have such limitation.

DEBUG_PAGEALLOC:
	- KASan is slower than DEBUG_PAGEALLOC, but KASan works on sub-page
	  granularity level, so it able to find more bugs.

SLUB_DEBUG (poisoning, redzones):
	- SLUB_DEBUG has lower overhead than KASan.

	- SLUB_DEBUG in most cases are not able to detect bad reads,
	  KASan able to detect both reads and writes.

	- In some cases (e.g. redzone overwritten) SLUB_DEBUG detect
	  bugs only on allocation/freeing of object. KASan catch
	  bugs right before it will happen, so we always know exact
	  place of first bad read/write.

[1] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel
[2] https://code.google.com/p/address-sanitizer/wiki/FoundBugs
[3] https://code.google.com/p/thread-sanitizer/wiki/FoundBugs
[4] https://code.google.com/p/memory-sanitizer/wiki/FoundBugs
[5] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel#Trophies

Based on work by Andrey Konovalov.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Acked-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:40 -08:00
Andrew Morton
0f989f749b MODULE_DEVICE_TABLE: fix some callsites 
The patch "module: fix types of device tables aliases" newly requires that
invocations of

MODULE_DEVICE_TABLE(type, name);

come *after* the definition of `name'.  That is reasonable, but some
drivers weren't doing this.  Fix them.

Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: David Miller <davem@davemloft.net>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-13 21:21:40 -08:00
Linus Torvalds
db3ecdee1c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 
Pull LED subsystem update from Bryan Wu:
 "The big change of LED subsystem is introducing a new LED class for
  Flash type LEDs which will be used for V4L2 subsystem.

  Also we got some cleanup and fixes"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
  leds: leds-gpio: Pass on error codes unmodified
  DT: leds: Add led-sources property
  leds: Add LED Flash class extension to the LED subsystem
  leds: leds-mc13783: Use of_get_child_by_name() instead of refcount hack
  leds: Use setup_timer
  leds: Don't allow brightness values greater than max_brightness
  DT: leds: Add flash LED devices related properties
 2015-02-13 10:54:44 -08:00
Linus Torvalds
b9085bcbf5 Fairly small update, but there are some interesting new features. 
Common: Optional support for adding a small amount of polling on each HLT
 instruction executed in the guest (or equivalent for other architectures).
 This can improve latency up to 50% on some scenarios (e.g. O_DSYNC writes
 or TCP_RR netperf tests).  This also has to be enabled manually for now,
 but the plan is to auto-tune this in the future.
 
 ARM/ARM64: the highlights are support for GICv3 emulation and dirty page
 tracking
 
 s390: several optimizations and bugfixes.  Also a first: a feature
 exposed by KVM (UUID and long guest name in /proc/sysinfo) before
 it is available in IBM's hypervisor! :)
 
 MIPS: Bugfixes.
 
 x86: Support for PML (page modification logging, a new feature in
 Broadwell Xeons that speeds up dirty page tracking), nested virtualization
 improvements (nested APICv---a nice optimization), usual round of emulation
 fixes.  There is also a new option to reduce latency of the TSC deadline
 timer in the guest; this needs to be tuned manually.
 
 Some commits are common between this pull and Catalin's; I see you
 have already included his tree.
 
 ARM has other conflicts where functions are added in the same place
 by 3.19-rc and 3.20 patches.  These are not large though, and entirely
 within KVM.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM update from Paolo Bonzini:
 "Fairly small update, but there are some interesting new features.

  Common:
     Optional support for adding a small amount of polling on each HLT
     instruction executed in the guest (or equivalent for other
     architectures).  This can improve latency up to 50% on some
     scenarios (e.g. O_DSYNC writes or TCP_RR netperf tests).  This
     also has to be enabled manually for now, but the plan is to
     auto-tune this in the future.

  ARM/ARM64:
     The highlights are support for GICv3 emulation and dirty page
     tracking

  s390:
     Several optimizations and bugfixes.  Also a first: a feature
     exposed by KVM (UUID and long guest name in /proc/sysinfo) before
     it is available in IBM's hypervisor! :)

  MIPS:
     Bugfixes.

  x86:
     Support for PML (page modification logging, a new feature in
     Broadwell Xeons that speeds up dirty page tracking), nested
     virtualization improvements (nested APICv---a nice optimization),
     usual round of emulation fixes.

     There is also a new option to reduce latency of the TSC deadline
     timer in the guest; this needs to be tuned manually.

     Some commits are common between this pull and Catalin's; I see you
     have already included his tree.

  Powerpc:
     Nothing yet.

     The KVM/PPC changes will come in through the PPC maintainers,
     because I haven't received them yet and I might end up being
     offline for some part of next week"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
  KVM: ia64: drop kvm.h from installed user headers
  KVM: x86: fix build with !CONFIG_SMP
  KVM: x86: emulate: correct page fault error code for NoWrite instructions
  KVM: Disable compat ioctl for s390
  KVM: s390: add cpu model support
  KVM: s390: use facilities and cpu_id per KVM
  KVM: s390/CPACF: Choose crypto control block format
  s390/kernel: Update /proc/sysinfo file with Extended Name and UUID
  KVM: s390: reenable LPP facility
  KVM: s390: floating irqs: fix user triggerable endless loop
  kvm: add halt_poll_ns module parameter
  kvm: remove KVM_MMIO_SIZE
  KVM: MIPS: Don't leak FPU/DSP to guest
  KVM: MIPS: Disable HTW while in guest
  KVM: nVMX: Enable nested posted interrupt processing
  KVM: nVMX: Enable nested virtual interrupt delivery
  KVM: nVMX: Enable nested apic register virtualization
  KVM: nVMX: Make nested control MSRs per-cpu
  KVM: nVMX: Enable nested virtualize x2apic mode
  KVM: nVMX: Prepare for using hardware MSR bitmap
  ...
 2015-02-13 09:55:09 -08:00
Linus Torvalds
c7d7b98671 Merge tag 'for-f2fs-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs 
Pull f2fs updates from Jaegeuk Kim:
 "Major changes are to:
   - add f2fs_io_tracer and F2FS_IOC_GETVERSION
   - fix wrong acl assignment from parent
   - fix accessing wrong data blocks
   - fix wrong condition check for f2fs_sync_fs
   - align start block address for direct_io
   - add and refactor the readahead flows of FS metadata
   - refactor atomic and volatile write policies

  But most of patches are for clean-ups and minor bug fixes.  Some of
  them refactor old code too"

* tag 'for-f2fs-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (64 commits)
  f2fs: use spinlock for segmap_lock instead of rwlock
  f2fs: fix accessing wrong indexed data blocks
  f2fs: avoid variable length array
  f2fs: fix sparse warnings
  f2fs: allocate data blocks in advance for f2fs_direct_IO
  f2fs: introduce macros to convert bytes and blocks in f2fs
  f2fs: call set_buffer_new for get_block
  f2fs: check node page contents all the time
  f2fs: avoid data offset overflow when lseeking huge file
  f2fs: fix to use highmem for pages of newly created directory
  f2fs: introduce a batched trim
  f2fs: merge {invalidate,release}page for meta/node/data pages
  f2fs: show the number of writeback pages in stat
  f2fs: keep PagePrivate during releasepage
  f2fs: should fail mount when trying to recover data on read-only dev
  f2fs: split UMOUNT and FASTBOOT flags
  f2fs: avoid write_checkpoint if f2fs is mounted readonly
  f2fs: support norecovery mount option
  f2fs: fix not to drop mount options when retrying fill_super
  f2fs: merge flags in struct f2fs_sb_info
  ...
 2015-02-12 19:28:50 -08:00
Linus Torvalds
818099574b Merge branch 'akpm' (patches from Andrew) 
Merge third set of updates from Andrew Morton:

 - the rest of MM

   [ This includes getting rid of the numa hinting bits, in favor of
     just generic protnone logic.  Yay.     - Linus ]

 - core kernel

 - procfs

 - some of lib/ (lots of lib/ material this time)

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (104 commits)
  lib/lcm.c: replace include
  lib/percpu_ida.c: remove redundant includes
  lib/strncpy_from_user.c: replace module.h include
  lib/stmp_device.c: replace module.h include
  lib/sort.c: move include inside #if 0
  lib/show_mem.c: remove redundant include
  lib/radix-tree.c: change to simpler include
  lib/plist.c: remove redundant include
  lib/nlattr.c: remove redundant include
  lib/kobject_uevent.c: remove redundant include
  lib/llist.c: remove redundant include
  lib/md5.c: simplify include
  lib/list_sort.c: rearrange includes
  lib/genalloc.c: remove redundant include
  lib/idr.c: remove redundant include
  lib/halfmd4.c: simplify includes
  lib/dynamic_queue_limits.c: simplify includes
  lib/sort.c: use simpler includes
  lib/interval_tree.c: simplify includes
  hexdump: make it return number of bytes placed in buffer
  ...
 2015-02-12 18:54:28 -08:00
Rafael Aquini
198d1597cc fs: proc: task_mmu: show page size in /proc/<pid>/numa_maps 
The output of /proc/$pid/numa_maps is in terms of number of pages like
anon=22 or dirty=54.  Here's some output:

  7f4680000000 default file=/hugetlb/bigfile anon=50 dirty=50 N0=50
  7f7659600000 default file=/anon_hugepage\040(deleted) anon=50 dirty=50 N0=50
  7fff8d425000 default stack anon=50 dirty=50 N0=50

Looks like we have a stack and a couple of anonymous hugetlbfs
areas page which both use the same amount of memory.  They don't.

The 'bigfile' uses 1GB pages and takes up ~50GB of space.  The
anon_hugepage uses 2MB pages and takes up ~100MB of space while the stack
uses normal 4k pages.  You can go over to smaps to figure out what the
page size _really_ is with KernelPageSize or MMUPageSize.  But, I think
this is a pretty nasty and counterintuitive interface as it stands.

This patch introduces 'kernelpagesize_kB' line element to
/proc/<pid>/numa_maps report file in order to help identifying the size of
pages that are backing memory areas mapped by a given task.  This is
specially useful to help differentiating between HUGE and GIGANTIC page
backed VMAs.

This patch is based on Dave Hansen's proposal and reviewer's follow-ups
taken from the following dicussion threads:
 * https://lkml.org/lkml/2011/9/21/454
 * https://lkml.org/lkml/2014/12/20/66

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-12 18:54:12 -08:00
Rafael Aquini
0c3697118b Documentation/filesystems/proc.txt: add /proc/pid/numa_maps interface explanation snippet 
Add a small section to proc.txt doc in order to document its
/proc/pid/numa_maps interface.  It does not introduce any functional
changes, just documentation.

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-12 18:54:12 -08:00
Petr Cermak
695f055936 fs/proc/task_mmu.c: add user-space support for resetting mm->hiwater_rss (peak RSS) 
Peak resident size of a process can be reset back to the process's
current rss value by writing "5" to /proc/pid/clear_refs.  The driving
use-case for this would be getting the peak RSS value, which can be
retrieved from the VmHWM field in /proc/pid/status, per benchmark
iteration or test scenario.

[akpm@linux-foundation.org: clarify behaviour in documentation]
Signed-off-by: Petr Cermak <petrcermak@chromium.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Primiano Tucci <primiano@chromium.org>
Cc: Petr Cermak <petrcermak@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-12 18:54:12 -08:00
Linus Torvalds
3e12cefbe1 Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block 
Pull core block IO changes from Jens Axboe:
 "This contains:

   - A series from Christoph that cleans up and refactors various parts
     of the REQ_BLOCK_PC handling.  Contributions in that series from
     Dongsu Park and Kent Overstreet as well.

   - CFQ:
        - A bug fix for cfq for realtime IO scheduling from Jeff Moyer.
        - A stable patch fixing a potential crash in CFQ in OOM
          situations.  From Konstantin Khlebnikov.

   - blk-mq:
        - Add support for tag allocation policies, from Shaohua. This is
          a prep patch enabling libata (and other SCSI parts) to use the
          blk-mq tagging, instead of rolling their own.
        - Various little tweaks from Keith and Mike, in preparation for
          DM blk-mq support.
        - Minor little fixes or tweaks from me.
        - A double free error fix from Tony Battersby.

   - The partition 4k issue fixes from Matthew and Boaz.

   - Add support for zero+unprovision for blkdev_issue_zeroout() from
     Martin"

* 'for-3.20/core' of git://git.kernel.dk/linux-block: (27 commits)
  block: remove unused function blk_bio_map_sg
  block: handle the null_mapped flag correctly in blk_rq_map_user_iov
  blk-mq: fix double-free in error path
  block: prevent request-to-request merging with gaps if not allowed
  blk-mq: make blk_mq_run_queues() static
  dm: fix multipath regression due to initializing wrong request
  cfq-iosched: handle failure of cfq group allocation
  block: Quiesce zeroout wrapper
  block: rewrite and split __bio_copy_iov()
  block: merge __bio_map_user_iov into bio_map_user_iov
  block: merge __bio_map_kern into bio_map_kern
  block: pass iov_iter to the BLOCK_PC mapping functions
  block: add a helper to free bio bounce buffer pages
  block: use blk_rq_map_user_iov to implement blk_rq_map_user
  block: simplify bio_map_kern
  block: mark blk-mq devices as stackable
  block: keep established cmd_flags when cloning into a blk-mq request
  block: add blk-mq support to blk_insert_cloned_request()
  block: require blk_rq_prep_clone() be given an initialized clone request
  blk-mq: add tag allocation policy
  ...
 2015-02-12 14:13:23 -08:00
Linus Torvalds
6bec003528 Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block 
Pull backing device changes from Jens Axboe:
 "This contains a cleanup of how the backing device is handled, in
  preparation for a rework of the life time rules.  In this part, the
  most important change is to split the unrelated nommu mmap flags from
  it, but also removing a backing_dev_info pointer from the
  address_space (and inode), and a cleanup of other various minor bits.

  Christoph did all the work here, I just fixed an oops with pages that
  have a swap backing.  Arnd fixed a missing export, and Oleg killed the
  lustre backing_dev_info from staging.  Last patch was from Al,
  unexporting parts that are now no longer needed outside"

* 'for-3.20/bdi' of git://git.kernel.dk/linux-block:
  Make super_blocks and sb_lock static
  mtd: export new mtd_mmap_capabilities
  fs: make inode_to_bdi() handle NULL inode
  staging/lustre/llite: get rid of backing_dev_info
  fs: remove default_backing_dev_info
  fs: don't reassign dirty inodes to default_backing_dev_info
  nfs: don't call bdi_unregister
  ceph: remove call to bdi_unregister
  fs: remove mapping->backing_dev_info
  fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info
  nilfs2: set up s_bdi like the generic mount_bdev code
  block_dev: get bdev inode bdi directly from the block device
  block_dev: only write bdev inode on close
  fs: introduce f_op->mmap_capabilities for nommu mmap support
  fs: kill BDI_CAP_SWAP_BACKED
  fs: deduplicate noop_backing_dev_info
 2015-02-12 13:50:21 -08:00
Linus Torvalds
61845143fe Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux 
Pull nfsd updates from Bruce Fields:
 "The main change is the pNFS block server support from Christoph, which
  allows an NFS client connected to shared disk to do block IO to the
  shared disk in place of NFS reads and writes.  This also requires xfs
  patches, which should arrive soon through the xfs tree, barring
  unexpected problems.  Support for other filesystems is also possible
  if there's interest.

  Thanks also to Chuck Lever for continuing work to get NFS/RDMA into
  shape"

* 'for-3.20' of git://linux-nfs.org/~bfields/linux: (32 commits)
  nfsd: default NFSv4.2 to on
  nfsd: pNFS block layout driver
  exportfs: add methods for block layout exports
  nfsd: add trace events
  nfsd: update documentation for pNFS support
  nfsd: implement pNFS layout recalls
  nfsd: implement pNFS operations
  nfsd: make find_any_file available outside nfs4state.c
  nfsd: make find/get/put file available outside nfs4state.c
  nfsd: make lookup/alloc/unhash_stid available outside nfs4state.c
  nfsd: add fh_fsid_match helper
  nfsd: move nfsd_fh_match to nfsfh.h
  fs: add FL_LAYOUT lease type
  fs: track fl_owner for leases
  nfs: add LAYOUT_TYPE_MAX enum value
  nfsd: factor out a helper to decode nfstime4 values
  sunrpc/lockd: fix references to the BKL
  nfsd: fix year-2038 nfs4 state problem
  svcrdma: Handle additional inline content
  svcrdma: Move read list XDR round-up logic
  ...
 2015-02-12 10:39:41 -08:00
Linus Torvalds
a26be149fa IOMMU Updates for Linux v3.20 
This time with:
 
 	* Generic page-table framework for ARM IOMMUs using the LPAE page-table
 	  format, ARM-SMMU and Renesas IPMMU make use of it already.
 
 	* Break out of the IO virtual address allocator from the Intel IOMMU so
 	  that it can be used by other DMA-API implementations too. The first
 	  user will be the ARM64 common DMA-API implementation for IOMMUs
 
 	* Device tree support for Renesas IPMMU
 
 	* Various fixes and cleanups all over the place
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Merge tag 'iommu-updates-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "This time with:

   - Generic page-table framework for ARM IOMMUs using the LPAE
     page-table format, ARM-SMMU and Renesas IPMMU make use of it
     already.

   - Break out the IO virtual address allocator from the Intel IOMMU so
     that it can be used by other DMA-API implementations too.  The
     first user will be the ARM64 common DMA-API implementation for
     IOMMUs

   - Device tree support for Renesas IPMMU

   - Various fixes and cleanups all over the place"

* tag 'iommu-updates-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (36 commits)
  iommu/amd: Convert non-returned local variable to boolean when relevant
  iommu: Update my email address
  iommu/amd: Use wait_event in put_pasid_state_wait
  iommu/amd: Fix amd_iommu_free_device()
  iommu/arm-smmu: Avoid build warning
  iommu/fsl: Various cleanups
  iommu/fsl: Use %pa to print phys_addr_t
  iommu/omap: Print phys_addr_t using %pa
  iommu: Make more drivers depend on COMPILE_TEST
  iommu/ipmmu-vmsa: Fix IOMMU lookup when multiple IOMMUs are registered
  iommu: Disable on !MMU builds
  iommu/fsl: Remove unused fsl_of_pamu_ids[]
  iommu/fsl: Fix section mismatch
  iommu/ipmmu-vmsa: Use the ARM LPAE page table allocator
  iommu: Fix trace_map() to report original iova and original size
  iommu/arm-smmu: add support for iova_to_phys through ATS1PR
  iopoll: Introduce memory-mapped IO polling macros
  iommu/arm-smmu: don't touch the secure STLBIALL register
  iommu/arm-smmu: make use of generic LPAE allocator
  iommu: io-pgtable-arm: add non-secure quirk
  ...
 2015-02-12 09:16:56 -08:00
Linus Torvalds
cdd305454e DeviceTree changes for 3.20: 
- DT unittests for I2C probing and overlays from Pantelis Antoniou
 - Remove DT unittest dependency on OF_DYNAMIC from Gaurav Minocha
 - Add Tegra compatible strings missing for newer parts from Paul
 Walmsley
 - Various vendor prefix additions
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Merge tag 'devicetree-for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree changes from Rob Herring:

 - DT unittests for I2C probing and overlays from Pantelis Antoniou

 - Remove DT unittest dependency on OF_DYNAMIC from Gaurav Minocha

 - Add Tegra compatible strings missing for newer parts from Paul
   Walmsley

 - Various vendor prefix additions

* tag 'devicetree-for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: Add vendor prefix for OmniVision Technologies
  of: Use ovti for Omnivision
  of: Add vendor prefix for Truly Semiconductors Limited
  of: Add vendor prefix for Himax Technologies Inc.
  of/fdt: fix sparse warning
  of: unitest: Add I2C overlay unit tests.
  Documentation: DT: document compatible string existence requirement
  Documentation: DT bindings: add nvidia, tegra132-denver compatible string
  Documentation: DT bindings: add more Tegra chip compatible strings
  of: EXPORT_SYMBOL_GPL of_property_read_u64_array
  of: Fix brace position for struct of_device_id definition
  of/unittest: Remove obsolete code
  dt-bindings: use isil prefix for Intersil in vendor-prefixes.txt
  Add AD Holdings Plc. to vendor-prefixes.
  dt-bindings: Add Silicon Mitus vendor prefix
  Removes OF_UNITTEST dependency on OF_DYNAMIC config symbol
  pinctrl: fix up device tree bindings
  DT: Vendors: Add Everspin
  doc: add bindings document for altera fpga manager
  drivers: of: Export of_reserved_mem_device_{init,release}
 2015-02-12 08:58:43 -08:00
Linus Torvalds
42cf0f203e Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 
Pull ARM updates from Russell King:

 - clang assembly fixes from Ard

 - optimisations and cleanups for Aurora L2 cache support

 - efficient L2 cache support for secure monitor API on Exynos SoCs

 - debug menu cleanup from Daniel Thompson to allow better behaviour for
   multiplatform kernels

 - StrongARM SA11x0 conversion to irq domains, and pxa_timer

 - kprobes updates for older ARM CPUs

 - move probes support out of arch/arm/kernel to arch/arm/probes

 - add inline asm support for the rbit (reverse bits) instruction

 - provide an ARM mode secondary CPU entry point (for Qualcomm CPUs)

 - remove the unused ARMv3 user access code

 - add driver_override support to AMBA Primecell bus

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (55 commits)
  ARM: 8256/1: driver coamba: add device binding path 'driver_override'
  ARM: 8301/1: qcom: Use secondary_startup_arm()
  ARM: 8302/1: Add a secondary_startup that assumes ARM mode
  ARM: 8300/1: teach __asmeq that r11 == fp and r12 == ip
  ARM: kprobes: Fix compilation error caused by superfluous '*'
  ARM: 8297/1: cache-l2x0: optimize aurora range operations
  ARM: 8296/1: cache-l2x0: clean up aurora cache handling
  ARM: 8284/1: sa1100: clear RCSR_SMR on resume
  ARM: 8283/1: sa1100: collie: clear PWER register on machine init
  ARM: 8282/1: sa1100: use handle_domain_irq
  ARM: 8281/1: sa1100: move GPIO-related IRQ code to gpio driver
  ARM: 8280/1: sa1100: switch to irq_domain_add_simple()
  ARM: 8279/1: sa1100: merge both GPIO irqdomains
  ARM: 8278/1: sa1100: split irq handling for low GPIOs
  ARM: 8291/1: replace magic number with PAGE_SHIFT macro in fixup_pv code
  ARM: 8290/1: decompressor: fix a wrong comment
  ARM: 8286/1: mm: Fix dma_contiguous_reserve comment
  ARM: 8248/1: pm: remove outdated comment
  ARM: 8274/1: Fix DEBUG_LL for multi-platform kernels (without PL01X)
  ARM: 8273/1: Seperate DEBUG_UART_PHYS from DEBUG_LL on EP93XX
  ...
 2015-02-12 08:51:56 -08:00
Linus Torvalds
8cc748aa76 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 
Pull security layer updates from James Morris:
 "Highlights:

   - Smack adds secmark support for Netfilter
   - /proc/keys is now mandatory if CONFIG_KEYS=y
   - TPM gets its own device class
   - Added TPM 2.0 support
   - Smack file hook rework (all Smack users should review this!)"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (64 commits)
  cipso: don't use IPCB() to locate the CIPSO IP option
  SELinux: fix error code in policydb_init()
  selinux: add security in-core xattr support for pstore and debugfs
  selinux: quiet the filesystem labeling behavior message
  selinux: Remove unused function avc_sidcmp()
  ima: /proc/keys is now mandatory
  Smack: Repair netfilter dependency
  X.509: silence asn1 compiler debug output
  X.509: shut up about included cert for silent build
  KEYS: Make /proc/keys unconditional if CONFIG_KEYS=y
  MAINTAINERS: email update
  tpm/tpm_tis: Add missing ifdef CONFIG_ACPI for pnp_acpi_device
  smack: fix possible use after frees in task_security() callers
  smack: Add missing logging in bidirectional UDS connect check
  Smack: secmark support for netfilter
  Smack: Rework file hooks
  tpm: fix format string error in tpm-chip.c
  char/tpm/tpm_crb: fix build error
  smack: Fix a bidirectional UDS connect check typo
  smack: introduce a special case for tmpfs in smack_d_instantiate()
  ...
 2015-02-11 20:25:11 -08:00
Linus Torvalds
59d53737a8 Merge branch 'akpm' (patches from Andrew) 
Merge second set of updates from Andrew Morton:
 "More of MM"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (83 commits)
  mm/nommu.c: fix arithmetic overflow in __vm_enough_memory()
  mm/mmap.c: fix arithmetic overflow in __vm_enough_memory()
  vmstat: Reduce time interval to stat update on idle cpu
  mm/page_owner.c: remove unnecessary stack_trace field
  Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files
  mm: incorporate read-only pages into transparent huge pages
  vmstat: do not use deferrable delayed work for vmstat_update
  mm: more aggressive page stealing for UNMOVABLE allocations
  mm: always steal split buddies in fallback allocations
  mm: when stealing freepages, also take pages created by splitting buddy page
  mincore: apply page table walker on do_mincore()
  mm: /proc/pid/clear_refs: avoid split_huge_page()
  mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)
  mempolicy: apply page table walker on queue_pages_range()
  arch/powerpc/mm/subpage-prot.c: use walk->vma and walk_page_vma()
  memcg: cleanup preparation for page table walk
  numa_maps: remove numa_maps->vma
  numa_maps: fix typo in gather_hugetbl_stats
  pagemap: use walk->vma instead of calling find_vma()
  clear_refs: remove clear_refs_private->vma and introduce clear_refs_test_walk()
  ...
 2015-02-11 18:23:28 -08:00
Linus Torvalds
d3f180ea1a powerpc updates for 3.20 
Including:
 
 - Update of all defconfigs
 - Addition of a bunch of config options to modernise our defconfigs
 - Some PS3 updates from Geoff
 - Optimised memcmp for 64 bit from Anton
 - Fix for kprobes that allows 'perf probe' to work from Naveen
 - Several cxl updates from Ian & Ryan
 - Expanded support for the '24x7' PMU from Cody & Sukadev
 - Freescale updates from Scott:
   "Highlights include 8xx optimizations, some more work on datapath device
    tree content, e300 machine check support, t1040 corenet error reporting,
    and various cleanups and fixes."
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Merge tag 'powerpc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

Pull powerpc updates from Michael Ellerman:

 - Update of all defconfigs

 - Addition of a bunch of config options to modernise our defconfigs

 - Some PS3 updates from Geoff

 - Optimised memcmp for 64 bit from Anton

 - Fix for kprobes that allows 'perf probe' to work from Naveen

 - Several cxl updates from Ian & Ryan

 - Expanded support for the '24x7' PMU from Cody & Sukadev

 - Freescale updates from Scott:
    "Highlights include 8xx optimizations, some more work on datapath
     device tree content, e300 machine check support, t1040 corenet
     error reporting, and various cleanups and fixes"

* tag 'powerpc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (102 commits)
  cxl: Add missing return statement after handling AFU errror
  cxl: Fail AFU initialisation if an invalid configuration record is found
  cxl: Export optional AFU configuration record in sysfs
  powerpc/mm: Warn on flushing tlb page in kernel context
  powerpc/powernv: Add OPAL soft-poweroff routine
  powerpc/perf/hv-24x7: Document sysfs event description entries
  powerpc/perf/hv-gpci: add the remaining gpci requests
  powerpc/perf/{hv-gpci, hv-common}: generate requests with counters annotated
  powerpc/perf/hv-24x7: parse catalog and populate sysfs with events
  perf: define EVENT_DEFINE_RANGE_FORMAT_LITE helper
  perf: add PMU_EVENT_ATTR_STRING() helper
  perf: provide sysfs_show for struct perf_pmu_events_attr
  powerpc/kernel: Avoid initializing device-tree pointer twice
  powerpc: Remove old compile time disabled syscall tracing code
  powerpc/kernel: Make syscall_exit a local label
  cxl: Fix device_node reference counting
  powerpc/mm: bail out early when flushing TLB page
  powerpc: defconfigs: add MTD_SPI_NOR (new dependency for M25P80)
  perf/powerpc: reset event hw state when adding it to the PMU
  powerpc/qe: Use strlcpy()
  ...
 2015-02-11 18:15:38 -08:00
Linus Torvalds
6b00f7efb5 arm64 updates for 3.20: 
- reimplementation of the virtual remapping of UEFI Runtime Services in
   a way that is stable across kexec
 - emulation of the "setend" instruction for 32-bit tasks (user
   endianness switching trapped in the kernel, SCTLR_EL1.E0E bit set
   accordingly)
 - compat_sys_call_table implemented in C (from asm) and made it a
   constant array together with sys_call_table
 - export CPU cache information via /sys (like other architectures)
 - DMA API implementation clean-up in preparation for IOMMU support
 - macros clean-up for KVM
 - dropped some unnecessary cache+tlb maintenance
 - CONFIG_ARM64_CPU_SUSPEND clean-up
 - defconfig update (CPU_IDLE)
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "arm64 updates for 3.20:

   - reimplementation of the virtual remapping of UEFI Runtime Services
     in a way that is stable across kexec
   - emulation of the "setend" instruction for 32-bit tasks (user
     endianness switching trapped in the kernel, SCTLR_EL1.E0E bit set
     accordingly)
   - compat_sys_call_table implemented in C (from asm) and made it a
     constant array together with sys_call_table
   - export CPU cache information via /sys (like other architectures)
   - DMA API implementation clean-up in preparation for IOMMU support
   - macros clean-up for KVM
   - dropped some unnecessary cache+tlb maintenance
   - CONFIG_ARM64_CPU_SUSPEND clean-up
   - defconfig update (CPU_IDLE)

  The EFI changes going via the arm64 tree have been acked by Matt
  Fleming.  There is also a patch adding sys_*stat64 prototypes to
  include/linux/syscalls.h, acked by Andrew Morton"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (47 commits)
  arm64: compat: Remove incorrect comment in compat_siginfo
  arm64: Fix section mismatch on alloc_init_p[mu]d()
  arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros
  arm64: mm: use *_sect to check for section maps
  arm64: drop unnecessary cache+tlb maintenance
  arm64:mm: free the useless initial page table
  arm64: Enable CPU_IDLE in defconfig
  arm64: kernel: remove ARM64_CPU_SUSPEND config option
  arm64: make sys_call_table const
  arm64: Remove asm/syscalls.h
  arm64: Implement the compat_sys_call_table in C
  syscalls: Declare sys_*stat64 prototypes if __ARCH_WANT_(COMPAT_)STAT64
  compat: Declare compat_sys_sigpending and compat_sys_sigprocmask prototypes
  arm64: uapi: expose our struct ucontext to the uapi headers
  smp, ARM64: Kill SMP single function call interrupt
  arm64: Emulate SETEND for AArch32 tasks
  arm64: Consolidate hotplug notifier for instruction emulation
  arm64: Track system support for mixed endian EL0
  arm64: implement generic IOMMU configuration
  arm64: Combine coherent and non-coherent swiotlb dma_ops
  ...
 2015-02-11 18:03:54 -08:00
Linus Torvalds
b3d6524ff7 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 
Pull s390 updates from Martin Schwidefsky:

 - The remaining patches for the z13 machine support: kernel build
   option for z13, the cache synonym avoidance, SMT support,
   compare-and-delay for spinloops and the CES5S crypto adapater.

 - The ftrace support for function tracing with the gcc hotpatch option.
   This touches common code Makefiles, Steven is ok with the changes.

 - The hypfs file system gets an extension to access diagnose 0x0c data
   in user space for performance analysis for Linux running under z/VM.

 - The iucv hvc console gets wildcard spport for the user id filtering.

 - The cacheinfo code is converted to use the generic infrastructure.

 - Cleanup and bug fixes.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits)
  s390/process: free vx save area when releasing tasks
  s390/hypfs: Eliminate hypfs interval
  s390/hypfs: Add diagnose 0c support
  s390/cacheinfo: don't use smp_processor_id() in preemptible context
  s390/zcrypt: fixed domain scanning problem (again)
  s390/smp: increase maximum value of NR_CPUS to 512
  s390/jump label: use different nop instruction
  s390/jump label: add sanity checks
  s390/mm: correct missing space when reporting user process faults
  s390/dasd: cleanup profiling
  s390/dasd: add locking for global_profile access
  s390/ftrace: hotpatch support for function tracing
  ftrace: let notrace function attribute disable hotpatching if necessary
  ftrace: allow architectures to specify ftrace compile options
  s390: reintroduce diag 44 calls for cpu_relax()
  s390/zcrypt: Add support for new crypto express (CEX5S) adapter.
  s390/zcrypt: Number of supported ap domains is not retrievable.
  s390/spinlock: add compare-and-delay to lock wait loops
  s390/tape: remove redundant if statement
  s390/hvc_iucv: add simple wildcard matches to the iucv allow filter
  ...
 2015-02-11 17:42:32 -08:00
Linus Torvalds
6f83e5bd3e NFS client updates for Linux 3.20 
Highlights incluse:
 
 Features:
 - Removing the forced serialisation of open()/close() calls in NFSv4.x (x>0)
   makes for a significant performance improvement in metadata intensive
   workloads.
 - Full support for the pNFS "flexible files" layout type
 - Further RPC/RDMA client improvements from Chuck
 
 Bugfixes:
 - Stable fix: NFSv4.1 backchannel calls blocking operations with !TASK_RUNNING
 - Stable fix: pnfs_generic_pg_init_read/write can be called with lseg == NULL
 - Stable fix: Fix an Oopsable condition when nsm_mon_unmon is called as part
   of the namespace cleanup,
 - Stable fix: Ensure we reference the inode for return-on-close in delegreturn
 
 - Use SO_REUSEPORT to ensure that NFSv3 TCP connections can rebind to the
   same source address/port combination during a disconnect/reconnect event.
   This is a requirement imposed by most NFSv3 server duplicate reply cache
   implementations.
 
 Optimisations:
 - Ask for no NFSv4.1 delegations on OPEN if using O_DIRECT
 
 Other:
 - Add Anna Schumaker as co-maintainer for the NFS client
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Merge tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Highlights incluse:

  Features:
   - Removing the forced serialisation of open()/close() calls in
     NFSv4.x (x>0) makes for a significant performance improvement in
     metadata intensive workloads.
   - Full support for the pNFS "flexible files" layout type
   - Further RPC/RDMA client improvements from Chuck

  Bugfixes:
   - Stable fix: NFSv4.1 backchannel calls blocking operations with !TASK_RUNNING
   - Stable fix: pnfs_generic_pg_init_read/write can be called with lseg == NULL
   - Stable fix: Fix an Oopsable condition when nsm_mon_unmon is called
     as part of the namespace cleanup,
   - Stable fix: Ensure we reference the inode for return-on-close in
     delegreturn
   - Use SO_REUSEPORT to ensure that NFSv3 TCP connections can rebind to
     the same source address/port combination during a disconnect/
     reconnect event.  This is a requirement imposed by most NFSv3
     server duplicate reply cache implementations.

  Optimisations:
   - Ask for no NFSv4.1 delegations on OPEN if using O_DIRECT

  Other:
   - Add Anna Schumaker as co-maintainer for the NFS client"

* tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (119 commits)
  SUNRPC: Cleanup to remove xs_tcp_close()
  pnfs: delete an unintended goto
  pnfs/flexfiles: Do not dprintk after the free
  SUNRPC: Fix stupid typo in xs_sock_set_reuseport
  SUNRPC: Define xs_tcp_fin_timeout only if CONFIG_SUNRPC_DEBUG
  SUNRPC: Handle connection reset more efficiently.
  SUNRPC: Remove the redundant XPRT_CONNECTION_CLOSE flag
  SUNRPC: Make xs_tcp_close() do a socket shutdown rather than a sock_release
  SUNRPC: Ensure xs_tcp_shutdown() requests a full close of the connection
  SUNRPC: Cleanup to remove remaining uses of XPRT_CONNECTION_ABORT
  SUNRPC: Remove TCP socket linger code
  SUNRPC: Remove TCP client connection reset hack
  SUNRPC: TCP/UDP always close the old socket before reconnecting
  SUNRPC: Add helpers to prevent socket create from racing
  SUNRPC: Ensure xs_reset_transport() resets the close connection flags
  SUNRPC: Do not clear the source port in xs_reset_transport
  SUNRPC: Handle EADDRINUSE on connect
  SUNRPC: Set SO_REUSEPORT socket option for TCP connections
  NFSv4.1: Fix pnfs_put_lseg races
  NFSv4.1: pnfs_send_layoutreturn should use GFP_NOFS
  ...
 2015-02-11 17:14:54 -08:00
Cyrill Gorcunov
740a5ddb0e Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files 
[akpm@linux-foundation.org: tweaks]
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Calvin Owens <calvinowens@fb.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-11 17:06:07 -08:00
Kirill A. Shutemov
dc6c9a35b6 mm: account pmd page tables to the process 
Dave noticed that unprivileged process can allocate significant amount of
memory -- >500 MiB on x86_64 -- and stay unnoticed by oom-killer and
memory cgroup.  The trick is to allocate a lot of PMD page tables.  Linux
kernel doesn't account PMD tables to the process, only PTE.

The use-cases below use few tricks to allocate a lot of PMD page tables
while keeping VmRSS and VmPTE low.  oom_score for the process will be 0.

	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <sys/mman.h>
	#include <sys/prctl.h>

	#define PUD_SIZE (1UL << 30)
	#define PMD_SIZE (1UL << 21)

	#define NR_PUD 130000

	int main(void)
	{
		char *addr = NULL;
		unsigned long i;

		prctl(PR_SET_THP_DISABLE);
		for (i = 0; i < NR_PUD ; i++) {
			addr = mmap(addr + PUD_SIZE, PUD_SIZE, PROT_WRITE|PROT_READ,
					MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
			if (addr == MAP_FAILED) {
				perror("mmap");
				break;
			}
			*addr = 'x';
			munmap(addr, PMD_SIZE);
			mmap(addr, PMD_SIZE, PROT_WRITE|PROT_READ,
					MAP_ANONYMOUS|MAP_PRIVATE|MAP_FIXED, -1, 0);
			if (addr == MAP_FAILED)
				perror("re-mmap"), exit(1);
		}
		printf("PID %d consumed %lu KiB in PMD page tables\n",
				getpid(), i * 4096 >> 10);
		return pause();
	}

The patch addresses the issue by account PMD tables to the process the
same way we account PTE.

The main place where PMD tables is accounted is __pmd_alloc() and
free_pmd_range(). But there're few corner cases:

 - HugeTLB can share PMD page tables. The patch handles by accounting
   the table to all processes who share it.

 - x86 PAE pre-allocates few PMD tables on fork.

 - Architectures with FIRST_USER_ADDRESS > 0. We need to adjust sanity
   check on exit(2).

Accounting only happens on configuration where PMD page table's level is
present (PMD is not folded).  As with nr_ptes we use per-mm counter.  The
counter value is used to calculate baseline for badness score by
oom-killer.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: David Rientjes <rientjes@google.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-11 17:06:04 -08:00
Johannes Weiner
241994ed86 mm: memcontrol: default hierarchy interface for memory 
Introduce the basic control files to account, partition, and limit
memory using cgroups in default hierarchy mode.

This interface versioning allows us to address fundamental design
issues in the existing memory cgroup interface, further explained
below.  The old interface will be maintained indefinitely, but a
clearer model and improved workload performance should encourage
existing users to switch over to the new one eventually.

The control files are thus:

  - memory.current shows the current consumption of the cgroup and its
    descendants, in bytes.

  - memory.low configures the lower end of the cgroup's expected
    memory consumption range.  The kernel considers memory below that
    boundary to be a reserve - the minimum that the workload needs in
    order to make forward progress - and generally avoids reclaiming
    it, unless there is an imminent risk of entering an OOM situation.

  - memory.high configures the upper end of the cgroup's expected
    memory consumption range.  A cgroup whose consumption grows beyond
    this threshold is forced into direct reclaim, to work off the
    excess and to throttle new allocations heavily, but is generally
    allowed to continue and the OOM killer is not invoked.

  - memory.max configures the hard maximum amount of memory that the
    cgroup is allowed to consume before the OOM killer is invoked.

  - memory.events shows event counters that indicate how often the
    cgroup was reclaimed while below memory.low, how often it was
    forced to reclaim excess beyond memory.high, how often it hit
    memory.max, and how often it entered OOM due to memory.max.  This
    allows users to identify configuration problems when observing a
    degradation in workload performance.  An overcommitted system will
    have an increased rate of low boundary breaches, whereas increased
    rates of high limit breaches, maximum hits, or even OOM situations
    will indicate internally overcommitted cgroups.

For existing users of memory cgroups, the following deviations from
the current interface are worth pointing out and explaining:

  - The original lower boundary, the soft limit, is defined as a limit
    that is per default unset.  As a result, the set of cgroups that
    global reclaim prefers is opt-in, rather than opt-out.  The costs
    for optimizing these mostly negative lookups are so high that the
    implementation, despite its enormous size, does not even provide
    the basic desirable behavior.  First off, the soft limit has no
    hierarchical meaning.  All configured groups are organized in a
    global rbtree and treated like equal peers, regardless where they
    are located in the hierarchy.  This makes subtree delegation
    impossible.  Second, the soft limit reclaim pass is so aggressive
    that it not just introduces high allocation latencies into the
    system, but also impacts system performance due to overreclaim, to
    the point where the feature becomes self-defeating.

    The memory.low boundary on the other hand is a top-down allocated
    reserve.  A cgroup enjoys reclaim protection when it and all its
    ancestors are below their low boundaries, which makes delegation
    of subtrees possible.  Secondly, new cgroups have no reserve per
    default and in the common case most cgroups are eligible for the
    preferred reclaim pass.  This allows the new low boundary to be
    efficiently implemented with just a minor addition to the generic
    reclaim code, without the need for out-of-band data structures and
    reclaim passes.  Because the generic reclaim code considers all
    cgroups except for the ones running low in the preferred first
    reclaim pass, overreclaim of individual groups is eliminated as
    well, resulting in much better overall workload performance.

  - The original high boundary, the hard limit, is defined as a strict
    limit that can not budge, even if the OOM killer has to be called.
    But this generally goes against the goal of making the most out of
    the available memory.  The memory consumption of workloads varies
    during runtime, and that requires users to overcommit.  But doing
    that with a strict upper limit requires either a fairly accurate
    prediction of the working set size or adding slack to the limit.
    Since working set size estimation is hard and error prone, and
    getting it wrong results in OOM kills, most users tend to err on
    the side of a looser limit and end up wasting precious resources.

    The memory.high boundary on the other hand can be set much more
    conservatively.  When hit, it throttles allocations by forcing
    them into direct reclaim to work off the excess, but it never
    invokes the OOM killer.  As a result, a high boundary that is
    chosen too aggressively will not terminate the processes, but
    instead it will lead to gradual performance degradation.  The user
    can monitor this and make corrections until the minimal memory
    footprint that still gives acceptable performance is found.

    In extreme cases, with many concurrent allocations and a complete
    breakdown of reclaim progress within the group, the high boundary
    can be exceeded.  But even then it's mostly better to satisfy the
    allocation from the slack available in other groups or the rest of
    the system than killing the group.  Otherwise, memory.max is there
    to limit this type of spillover and ultimately contain buggy or
    even malicious applications.

  - The original control file names are unwieldy and inconsistent in
    many different ways.  For example, the upper boundary hit count is
    exported in the memory.failcnt file, but an OOM event count has to
    be manually counted by listening to memory.oom_control events, and
    lower boundary / soft limit events have to be counted by first
    setting a threshold for that value and then counting those events.
    Also, usage and limit files encode their units in the filename.
    That makes the filenames very long, even though this is not
    information that a user needs to be reminded of every time they
    type out those names.

    To address these naming issues, as well as to signal clearly that
    the new interface carries a new configuration model, the naming
    conventions in it necessarily differ from the old interface.

  - The original limit files indicate the state of an unset limit with
    a very high number, and a configured limit can be unset by echoing
    -1 into those files.  But that very high number is implementation
    and architecture dependent and not very descriptive.  And while -1
    can be understood as an underflow into the highest possible value,
    -2 or -10M etc. do not work, so it's not inconsistent.

    memory.low, memory.high, and memory.max will use the string
    "infinity" to indicate and set the highest possible value.

[akpm@linux-foundation.org: use seq_puts() for basic strings]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Greg Thelen <gthelen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-11 17:06:02 -08:00
Wang, Yalin
56873f43ab mm:add KPF_ZERO_PAGE flag for /proc/kpageflags 
Add KPF_ZERO_PAGE flag for zero_page, so that userspace processes can
detect zero_page in /proc/kpageflags, and then do memory analysis more
accurately.

Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2015-02-11 17:06:00 -08:00
Jaegeuk Kim
bba681cbb2 f2fs: introduce a batched trim 
This patch introduces a batched trimming feature, which submits split discard
commands.

This is to avoid long latency due to huge trim commands.
If fstrim was triggered ranging from 0 to the end of device, we should lock
all the checkpoint-related mutexes, resulting in very long latency.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2015-02-11 17:04:44 -08:00
Jaegeuk Kim
2d834bf9ac f2fs: support norecovery mount option 
This patch adds a mount option, norecovery, which is mostly same as
disable_roll_forward. The only difference is that norecovery should be activated
with read-only mount option.

This can be used when user wants to check whether f2fs is mountable or not
without any recovery process. (e.g., xfstests/200)

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2015-02-11 17:04:40 -08:00
Linus Torvalds
73b4f63aeb Documentation changes for 3.20 
Highlights this time around include:
 
  - A thrashing of SubmittingPatches to bring it out of the "send everything
    to Linus" era of kernel development.
 
  - A new document on completions from Nicholas McGuire
 
  - Lots of typo fixes, formatting improvements, corrections, build fixes,
    and more.
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Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6

Pull documentation updates from Jonathan Corbet:
 "Highlights this time around include:

   - A thrashing of SubmittingPatches to bring it out of the "send
     everything to Linus" era of kernel development.

   - A new document on completions from Nicholas McGuire

   - Lots of typo fixes, formatting improvements, corrections, build
     fixes, and more"

* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (35 commits)
  Documentation: Fix the wrong command `echo -1 > set_ftrace_pid` for cleaning the filter.
  can-doc: Fixed a wrong filepath in can.txt
  Documentation: Fix trivial typo in comment.
  kgdb,docs: Fix typo and minor style issues
  Documentation: add description for FTRACE probe status
  doc: brief user documentation for completion
  Documentation/misc-devices/mei: Fix indentation of embedded code.
  Documentation/misc-devices/mei: Fix indentation of enumeration.
  Documentation/misc-devices/mei: Fix spacing around parentheses.
  Documentation/misc-devices/mei: Fix formatting of headings.
  Documentation: devicetree: Fix double words in Doumentation/devicetree
  Documentation: mm: Fix typo in vm.txt
  lockstat: Add documentation on contention and contenting points
  Documentation: fix blackfin gptimers-example build errors
  Fixes column alignment in table of contents entry 1.9 in Documentation/filesystems/proc.txt
  CodingStyle: enable emacs display of trailing whitespace
  DocBook: Do not exceed argument list limit
  gpio: board.txt: Fix the gpio name example
  Documentation/SubmittingPatches: unify whitespace/tabs for the DCO
  MAINTAINERS: Add the docs-next git tree to the maintainer entry
  ...
 2015-02-11 13:03:11 -08:00
Linus Torvalds
bfe9183fdc Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration 
Pull mailbox framework updates from Jassi Brar.

* 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: Add Altera mailbox driver
  mailbox: check for bit set before polling
  Mailbox: Fix return value check in pcc_init()
 2015-02-11 12:56:40 -08:00
Linus Torvalds
ce01e871a1 This is the bulk of pin control changes for the v3.20 cycle: 
- Framework changes and enhancements:
   - Passing -DDEBUG recursively to subdir drivers so we get
     debug messages properly turned on.
   - Infer map type from DT property in the groups parsing code
     in the generic pinconfig code.
   - Support for custom parameter passing in generic pin config.
     This is used when you are using the generic pin config, but
     want to add a few custom properties that no other driver
     will use.
 
 - New drivers:
   - Driver for the Xilinx Zynq
   - Driver for the AmLogic Meson SoCs
 
 - New features in drivers:
   - Sleep support (suspend/resume) for the Cherryview driver
   - mvebeu a38x can now mux a UART on pins MPP19 and MPP20
   - Migrated the qualcomm driver to generic pin config handling
     of extended config options in the core code.
   - Support BUS1 and AUDIO in the Exynos pin controller.
   - Add some missing functions in the sun6i driver.
   - Add support for the A31S variant in the sun6i driver.
   - EMEv2 support in the Renesas PFC driver.
   - Ass support for Qualcomm MSM8916 in the qcom driver.
 
 - Deleted features
   - Drop support for the SiRF Marco that was never released to
     the market.
   - Drop SH7372 support as the support for this platform is
     removed from the kernel.
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Merge tag 'pinctrl-v3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pincontrol updates from Linus Walleij:
 :This is the bulk of pin control changes for the v3.20 cycle:

  Framework changes and enhancements:
   - Passing -DDEBUG recursively to subdir drivers so we get debug
     messages properly turned on.
   - Infer map type from DT property in the groups parsing code in the
     generic pinconfig code.
   - Support for custom parameter passing in generic pin config.  This
     is used when you are using the generic pin config, but want to add
     a few custom properties that no other driver will use.

  New drivers:
   - Driver for the Xilinx Zynq
   - Driver for the AmLogic Meson SoCs

  New features in drivers:
   - Sleep support (suspend/resume) for the Cherryview driver
   - mvebeu a38x can now mux a UART on pins MPP19 and MPP20
   - Migrated the qualcomm driver to generic pin config handling of
     extended config options in the core code.
   - Support BUS1 and AUDIO in the Exynos pin controller.
   - Add some missing functions in the sun6i driver.
   - Add support for the A31S variant in the sun6i driver.
   - EMEv2 support in the Renesas PFC driver.
   - Add support for Qualcomm MSM8916 in the qcom driver.

  Deleted features
   - Drop support for the SiRF Marco that was never released to the
     market.
   - Drop SH7372 support as the support for this platform is removed
     from the kernel"

* tag 'pinctrl-v3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (40 commits)
  sh-pfc: emev2 - Fix mangled author name
  pinctrl: cherryview: Configure HiZ pins to be input when requested as GPIOs
  pinctrl: imx25: fix numbering for pins
  pinctrl: pinctrl-imx: don't use invalid value of conf_reg
  pinctrl: qcom: delete pin_config_get/set pinconf operations
  pinctrl: qcom: Add msm8916 pinctrl driver
  DT: pinctrl: Document Qualcomm MSM8916 pinctrl binding
  pinctrl: qcom: increase variable size for register offsets
  pinctrl: hide PCONFDUMP in #ifdef
  pinctrl: rockchip: Only mask interrupts; never disable
  pinctrl: zynq: Fix usb0 pins
  pinctrl: sh-pfc: sh7372: Remove DT binding documentation
  pinctrl: sh-pfc: sh7372: Remove PFC support
  sh-pfc: Add emev2 pinmux support
  sh-pfc: add macro to define pinmux without function
  pinctrl: add driver for Amlogic Meson SoCs
  staging: drivers: pinctrl: Fixed checkpatch.pl warnings
  pinctrl: exynos: Add AUDIO pin controller for exynos7
  sh-pfc: r8a7790: add MLB+ pin group
  sh-pfc: r8a7791: add MLB+ pin group
  ...
 2015-02-11 11:23:13 -08:00
Linus Torvalds
a1df7efeda This is the GPIO bulk changes for the v3.20 series: 
- GPIOLIB core changes:
   - Create and use of_mm_gpiochip_remove() for removing
     memory-mapped OF GPIO chips
   - GPIO MMIO library suppports bgpio_set_multiple for
     switching several lines at once, a feature merged in
     the last cycle.
 - New drivers:
   - New driver for the APM X-gene standby GPIO controller
   - New driver for the Fujitsu MB86S7x GPIO controller
 - Cleanups:
   - Moved rcar driver to use gpiolib irqchip
   - Moxart converted to the GPIO MMIO library
   - GE driver converted to GPIO MMIO library
   - Move sx150x to irqdomain
   - Move max732x to irqdomain
   - Move vx855 to use managed resources
   - Move dwapb to use managed resources
   - Clean tc3589x from platform data
   - Clean stmpe driver to use device tree only probe
 - New subtypes:
   - sx1506 support in the sx150x driver
   - Quark 1000 SoC support in the SCH driver
   - Support X86 in the Xilinx driver
   - Support PXA1928 in the PXA driver
 - Extended drivers:
   - max732x supports device tree probe
   - sx150x supports device tree probe
 - Various minor cleanups and bug fixes
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Merge tag 'gpio-v3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO changes from Linus Walleij:
 "This is the GPIO bulk changes for the v3.20 series:

  GPIOLIB core changes:
   - Create and use of_mm_gpiochip_remove() for removing memory-mapped
     OF GPIO chips
   - GPIO MMIO library suppports bgpio_set_multiple for switching
     several lines at once, a feature merged in the last cycle.

  New drivers:
   - New driver for the APM X-gene standby GPIO controller
   - New driver for the Fujitsu MB86S7x GPIO controller

  Cleanups:
   - Moved rcar driver to use gpiolib irqchip
   - Moxart converted to the GPIO MMIO library
   - GE driver converted to GPIO MMIO library
   - Move sx150x to irqdomain
   - Move max732x to irqdomain
   - Move vx855 to use managed resources
   - Move dwapb to use managed resources
   - Clean tc3589x from platform data
   - Clean stmpe driver to use device tree only probe

  New subtypes:
   - sx1506 support in the sx150x driver
   - Quark 1000 SoC support in the SCH driver
   - Support X86 in the Xilinx driver
   - Support PXA1928 in the PXA driver

  Extended drivers:
   - max732x supports device tree probe
   - sx150x supports device tree probe

  Various minor cleanups and bug fixes"

* tag 'gpio-v3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (61 commits)
  gpio: kconfig: replace PPC_OF with PPC
  gpio: pxa: add PXA1928 gpio type support
  dt/bindings: gpio: add compatible string for marvell,pxa1928-gpio
  gpio: pxa: remove mach IRQ includes
  gpio: max732x: use an inline function for container cast
  gpio: use sizeof() instead of hardcoded values
  gpio: max732x: add set_multiple function
  gpio: sch: Consolidate similar algorithms
  gpio: tz1090-pdc: Use resource_size to fix off-by-one resource size calculation
  gpio: ge: Convert to use devm_kstrdup
  gpio: correctly use const char * const
  gpio: sx150x: fixup OF support
  gpio: mpc8xxx: Use of_mm_gpiochip_remove
  gpio: Add Fujitsu MB86S7x GPIO driver
  gpio: mpc8xxx: Convert to platform device interface.
  gpio: zevio: Use of_mm_gpiochip_remove
  gpio: gpio-mm-lantiq: Use of_mm_gpiochip_remove
  gpio: gpio-mm-lantiq: Use of_property_read_u32
  gpio: gpio-mm-lantiq: Do not replicate code
  gpio :gpio-mm-lantiq: Use devm_kzalloc
  ...
 2015-02-11 11:17:34 -08:00
Linus Torvalds
aa7ed01f93 MMC core: 
- Support for MMC power sequences.
 - SDIO function devicetree subnode parsing.
 - Refactor the hardware reset routines and enable it for SD cards.
 - Various code quality improvements, especially for slot-gpio.
 
 MMC host:
 - dw_mmc: Various fixes and cleanups.
 - dw_mmc: Convert to mmc_send_tuning().
 - moxart: Fix probe logic.
 - sdhci: Various fixes and cleanups
 - sdhci: Asynchronous request handling support.
 - sdhci-pxav3: Various fixes and cleanups.
 - sdhci-tegra: Fixes for T114, T124 and T132.
 - rtsx: Various fixes and cleanups.
 - rtsx: Support for SDIO.
 - sdhi/tmio: Refactor and cleanup of header files.
 - omap_hsmmc: Use slot-gpio and common MMC DT parser.
 - Make all hosts to deal with errors from mmc_of_parse().
 - sunxi: Various fixes and cleanups.
 - sdhci: Support for Fujitsu SDHCI controller f_sdh30.
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Merge tag 'mmc-v3.20-1' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Support for MMC power sequences.
   - SDIO function devicetree subnode parsing.
   - Refactor the hardware reset routines and enable it for SD cards.
   - Various code quality improvements, especially for slot-gpio.

  MMC host:
   - dw_mmc: Various fixes and cleanups.
   - dw_mmc: Convert to mmc_send_tuning().
   - moxart: Fix probe logic.
   - sdhci: Various fixes and cleanups
   - sdhci: Asynchronous request handling support.
   - sdhci-pxav3: Various fixes and cleanups.
   - sdhci-tegra: Fixes for T114, T124 and T132.
   - rtsx: Various fixes and cleanups.
   - rtsx: Support for SDIO.
   - sdhi/tmio: Refactor and cleanup of header files.
   - omap_hsmmc: Use slot-gpio and common MMC DT parser.
   - Make all hosts to deal with errors from mmc_of_parse().
   - sunxi: Various fixes and cleanups.
   - sdhci: Support for Fujitsu SDHCI controller f_sdh30"

* tag 'mmc-v3.20-1' of git://git.linaro.org/people/ulf.hansson/mmc: (117 commits)
  mmc: sdhci-s3c: solve problem with sleeping in atomic context
  mmc: pwrseq: add driver for emmc hardware reset
  mmc: moxart: fix probe logic
  mmc: core: Invoke mmc_pwrseq_post_power_on() prior MMC_POWER_ON state
  mmc: pwrseq_simple: Add optional reference clock support
  mmc: pwrseq: Document optional clock for the simple power sequence
  mmc: pwrseq_simple: Extend to support more pins
  mmc: pwrseq: Document that simple sequence support more than one GPIO
  mmc: Add hardware dependencies for sdhci-pxav3 and sdhci-pxav2
  mmc: sdhci-pxav3: Modify clock settings for the SDR50 and DDR50 modes
  mmc: sdhci-pxav3: Extend binding with SDIO3 conf reg for the Armada 38x
  mmc: sdhci-pxav3: Fix Armada 38x controller's caps according to erratum ERR-7878951
  mmc: sdhci-pxav3: Fix SDR50 and DDR50 capabilities for the Armada 38x flavor
  mmc: sdhci: switch voltage before sdhci_set_ios in runtime resume
  mmc: tegra: Write xfer_mode, CMD regs in together
  mmc: Resolve BKOPS compatability issue
  mmc: sdhci-pxav3: fix setting of pdata->clk_delay_cycles
  mmc: dw_mmc: rockchip: remove incorrect __exit_p()
  mmc: dw_mmc: exynos: remove incorrect __exit_p()
  mmc: Fix menuconfig alignment of MMC_SDHCI_* options
  ...
 2015-02-11 10:56:48 -08:00
Linus Torvalds
718749d562 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 
Pull input updates from Dmitry Torokhov:
 "The first round of updates for the input subsystem.

  A few new drivers (power button handler for AXP20x PMIC, tps65218
  power button driver, sun4i keys driver, regulator haptic driver, NI
  Ettus Research USRP E3x0 button, Alwinner A10/A20 PS/2 controller).

  Updates to Synaptics and ALPS touchpad drivers (with more to come
  later), brand new Focaltech PS/2 support, update to Cypress driver to
  handle Gen5 (in addition to Gen3) devices, and number of other fixups
  to various drivers as well as input core"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (54 commits)
  Input: elan_i2c - fix wrong %p extension
  Input: evdev - do not queue SYN_DROPPED if queue is empty
  Input: gscps2 - fix MODULE_DEVICE_TABLE invocation
  Input: synaptics - use dmax in input_mt_assign_slots
  Input: pxa27x_keypad - remove unnecessary ARM includes
  Input: ti_am335x_tsc - replace delta filtering with median filtering
  ARM: dts: AM335x: Make charge delay a DT parameter for TSC
  Input: ti_am335x_tsc - read charge delay from DT
  Input: ti_am335x_tsc - remove udelay in interrupt handler
  Input: ti_am335x_tsc - interchange touchscreen and ADC steps
  Input: MT - add support for balanced slot assignment
  Input: drv2667 - remove wrong and unneeded drv2667-haptics modalias
  Input: drv260x - remove wrong and unneeded drv260x-haptics modalias
  Input: cap11xx - remove wrong and unneeded cap11xx modalias
  Input: sun4i-ts - add support for touchpanel controller on A31
  Input: serio - add support for Alwinner A10/A20 PS/2 controller
  Input: gtco - use sign_extend32() for sign extension
  Input: elan_i2c - verify firmware signature applying it
  Input: elantech - remove stale comment from Kconfig
  Input: cyapa - off by one in cyapa_update_fw_store()
  ...
 2015-02-11 09:32:08 -08:00
Linus Torvalds
e0c8453769 fbdev changes for v3.20 
* omapdss: add DRA7xxx SoC support
 * fbdev: support DMT (Display Monitor Timing) calculation
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Merge tag 'fbdev-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux

Pull fbdev changes from Tomi Valkeinen:

 - omapdss: add DRA7xxx SoC support

 - fbdev: support DMT (Display Monitor Timing) calculation

* tag 'fbdev-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (40 commits)
  omapfb: Return error code when applying overlay settings fails
  OMAPDSS: DPI: DRA7xx support
  OMAPDSS: HDMI: Add DRA7xx support
  OMAPDSS: DISPC: program dispc polarities to control module
  OMAPDSS: DISPC: Add DRA7xx support
  OMAPDSS: Add Video PLLs for DRA7xx
  OMAPDSS: Add functions for external control of PLL
  OMAPDSS: DSS: Add DRA7xx base support
  Doc/DT: Add DT binding doc for DRA7xx DSS
  OMAPDSS: add define for DRA7xx HW version
  OMAPDSS: encoder-tpd12s015: Fix race issue with LS_OE
  OMAPDSS: OMAP5: fix digit output's allowed mgrs
  OMAPDSS: constify port arrays
  OMAPDSS: PLL: add dss_pll_wait_reset_done()
  OMAPDSS: Add enum dss_pll_id
  video: fbdev: fix sys_copyarea
  video/mmpfb: allow modular build
  fb: via: turn gpiolib and i2c selects into dependencies
  fbdev: ssd1307fb: return proper error code if write command fails
  fbdev: fix CVT vertical front and back porch values
  ...
 2015-02-11 09:24:30 -08:00
Linus Torvalds
a323ae93a7 sound updates for 3.20-rc1 
In this batch, you can find lots of cleanups through the whole
 subsystem, as our good New Year's resolution.  Lots of LOCs and
 commits are about LINE6 driver that was promoted finally from staging
 tree, and as usual, there've been widely spread ASoC changes.
 
 Here some highlights:
 
 ALSA core changes
   - Embedding struct device into ALSA core structures
   - sequencer core cleanups / fixes
   - PCM msbits constraints cleanups / fixes
   - New SNDRV_PCM_TRIGGER_DRAIN command
   - PCM kerneldoc fixes, header cleanups
   - PCM code cleanups using more standard codes
   - Control notification ID fixes
 
 Driver cleanups
   - Cleanups of PCI PM callbacks
   - Timer helper usages cleanups
   - Simplification (e.g. argument reduction) of many driver codes
 
 HD-audio
   - Hotkey and LED support on HP laptops with Realtek codecs
   - Dock station support on HP laptops
   - Toshiba Satellite S50D fixup
   - Enhanced wallclock timestamp handling for HD-audio
   - Componentization to simplify the linkage between i915 and hd-audio
     drivers for Intel HDMI/DP
 
 USB-audio
   - Akai MPC Element support
   - Enhanced timestamp handling
 
 ASoC
   - Lots of refactoringin ASoC core, moving drivers to more data
     driven initialization and rationalizing a lot of DAPM usage
   - Much improved handling of CDCLK clocks on Samsung I2S controllers
   - Lots of driver specific cleanups and feature improvements
   - CODEC support for TI PCM514x and TLV320AIC3104 devices
   - Board support for Tegra systems with Realtek RT5677
   - New driver for Maxim max98357a
   - More enhancements / fixes for Intel SST driver
 
 Others
   - Promotion of LINE6 driver from staging along with lots of rewrites
     and cleanups
   - DT support for old non-ASoC atmel driver
   - oxygen cleanups, XIO2001 init, Studio Evolution SE6x support
   - Emu8000 DRAM size detection fix on ISA(!!) AWE64 boards
   - A few more ak411x fixes for ice1724 boards
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Merge tag 'sound-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "In this batch, you can find lots of cleanups through the whole
  subsystem, as our good New Year's resolution.  Lots of LOCs and
  commits are about LINE6 driver that was promoted finally from staging
  tree, and as usual, there've been widely spread ASoC changes.

  Here some highlights:

  ALSA core changes
   - Embedding struct device into ALSA core structures
   - sequencer core cleanups / fixes
   - PCM msbits constraints cleanups / fixes
   - New SNDRV_PCM_TRIGGER_DRAIN command
   - PCM kerneldoc fixes, header cleanups
   - PCM code cleanups using more standard codes
   - Control notification ID fixes

  Driver cleanups
   - Cleanups of PCI PM callbacks
   - Timer helper usages cleanups
   - Simplification (e.g. argument reduction) of many driver codes

  HD-audio
   - Hotkey and LED support on HP laptops with Realtek codecs
   - Dock station support on HP laptops
   - Toshiba Satellite S50D fixup
   - Enhanced wallclock timestamp handling for HD-audio
   - Componentization to simplify the linkage between i915 and hd-audio
     drivers for Intel HDMI/DP

  USB-audio
   - Akai MPC Element support
   - Enhanced timestamp handling

  ASoC
   - Lots of refactoringin ASoC core, moving drivers to more data driven
     initialization and rationalizing a lot of DAPM usage
   - Much improved handling of CDCLK clocks on Samsung I2S controllers
   - Lots of driver specific cleanups and feature improvements
   - CODEC support for TI PCM514x and TLV320AIC3104 devices
   - Board support for Tegra systems with Realtek RT5677
   - New driver for Maxim max98357a
   - More enhancements / fixes for Intel SST driver

  Others
   - Promotion of LINE6 driver from staging along with lots of rewrites
     and cleanups
   - DT support for old non-ASoC atmel driver
   - oxygen cleanups, XIO2001 init, Studio Evolution SE6x support
   - Emu8000 DRAM size detection fix on ISA(!!) AWE64 boards
   - A few more ak411x fixes for ice1724 boards"

* tag 'sound-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (542 commits)
  ALSA: line6: toneport: Use explicit type for firmware version
  ALSA: line6: Use explicit type for serial number
  ALSA: line6: Return EIO if read/write not successful
  ALSA: line6: Return error if device not responding
  ALSA: line6: Add delay before reading status
  ASoC: Intel: Clean data after SST fw fetch
  ALSA: hda - Add docking station support for another HP machine
  ALSA: control: fix failure to return new numerical ID in 'replace' event data
  ALSA: usb: update trigger timestamp on first non-zero URB submitted
  ALSA: hda: read trigger_timestamp immediately after starting DMA
  ALSA: pcm: allow for trigger_tstamp snapshot in .trigger
  ALSA: pcm: don't override timestamp unconditionally
  ALSA: off by one bug in snd_riptide_joystick_probe()
  ASoC: rt5670: Set use_single_rw flag for regmap
  ASoC: rt286: Add rt288 codec support
  ASoC: max98357a: Fix build in !CONFIG_OF case
  ASoC: Intel: fix platform_no_drv_owner.cocci warnings
  ARM: dts: Switch Odroid X2/U2 to simple-audio-card
  ARM: dts: Exynos4 and Odroid X2/U3 sound device nodes update
  ALSA: control: fix failure to return numerical ID in 'add' event
  ...
 2015-02-11 08:51:59 -08:00