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9 years agoserial/amba-pl011: Activate TX IRQ passively
Dave Martin [Wed, 4 Mar 2015 12:27:33 +0000 (12:27 +0000)]
serial/amba-pl011: Activate TX IRQ passively

The current PL011 driver transmits a dummy character when the UART
is opened, to assert the TX IRQ for the first time
(see pl011_startup()).  The UART is put in loopback mode temporarily,
so the receiver presumably shouldn't see anything.

However...

At least some platforms containing a PL011 send characters down the
wire even when loopback mode is enabled.  This means that a
spurious NUL character may be seen at the receiver when the PL011 is
opened through the TTY layer.

The current code also temporarily sets the baud rate to maximum and
the character width to the minimum, to that the dummy TX completes
as quickly as possible.  If this is seen by the receiver it will
result in a framing error and can knock the receiver out of sync --
turning subsequent output into garbage until synchronisation
is reestablished.  (Particularly problematic during boot with systemd.)

To avoid spurious transmissions, this patch removes assumptions about
whether the TX IRQ will fire until at least one TX IRQ has been seen.

Instead, the UART will unmask the TX IRQ and then slow-start via
polling and timer-based soft IRQs initially.  If the TTY layer writes
enough data to fill the FIFO to the interrupt threshold in one go,
the TX IRQ should assert, at which point the driver changes to
fully interrupt-driven TX.

In this way, the TX IRQ is activated as a side-effect instead of
being done deliberately.

This should also mean that the driver works on the SBSA Generic
UART[1] (a cut-down PL011) without invasive changes.  The Generic
UART lacks some features needed for the dummy TX approach to work
(FIFO disabling and loopback).

[1] Server Base System Architecture (ARM-DEN-0029-v2.3)
    http://infocenter.arm.com/
    (click-thru required :/)

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: serial: xilinx_uartps: Use Macro for ttyPS0
Peter Crosthwaite [Tue, 24 Feb 2015 23:13:57 +0000 (15:13 -0800)]
tty: serial: xilinx_uartps: Use Macro for ttyPS0

All instances of "ttyPS" use this macro except for this one. Convert
it.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: sprd: Fix iotype
Peter Hurley [Tue, 24 Feb 2015 17:06:34 +0000 (12:06 -0500)]
serial: sprd: Fix iotype

The Spreadtrum UART is accessed with mmio; declare the proper iotype.
Also prevent userspace from assigning any other iotype via
ioctl(TIOCSSERIAL).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: add support for half duplex rs485
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:11 +0000 (11:17 +0100)]
serial: imx: add support for half duplex rs485

The transmitter is expected to be controlled by the UART's RTS pin.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: drop support for IRDA
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:10 +0000 (11:17 +0100)]
serial: imx: drop support for IRDA

Support for IRDA was added in 2009 in commit v2.6.31-rc1~399^2~2. There
are no in-tree users.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: fix comment about which machines use the i.MX21 type
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:09 +0000 (11:17 +0100)]
serial: imx: fix comment about which machines use the i.MX21 type

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: reformat and cleanup copyright header
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:08 +0000 (11:17 +0100)]
serial: imx: reformat and cleanup copyright header

Fix indention, remove old address of the FSF, remove in-file changelog,
mention Freescale.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: drop members from driver data that are only used during probe
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:07 +0000 (11:17 +0100)]
serial: imx: drop members from driver data that are only used during probe

There is no benefit in keeping this information in RAM when it's not
used any more, so better use function local variables instead.

These members are unused since c0d1c6b0f0dc ("serial: imx: Fix the
reporting of interrupts")

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: remove long dead code
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:06 +0000 (11:17 +0100)]
serial: imx: remove long dead code

This if (0) exists since the driver was introduced in commit
c49bde83eb6a ([ARM PATCH] 1956/2: Re: Motorola i.MX serial driver)
back in 2004.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: Fix clearing of receiver overrun flag
Uwe Kleine-König [Tue, 24 Feb 2015 10:17:05 +0000 (11:17 +0100)]
serial: imx: Fix clearing of receiver overrun flag

The writeable bits in the USR2 register are all "write 1 to
clear" so only write the bits that actually should be cleared.

Fixes: f1f836e4209e ("serial: imx: Add Rx Fifo overrun error message")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agox86, intel-mid: remove Intel MID specific serial support
Andy Shevchenko [Mon, 23 Feb 2015 14:24:44 +0000 (16:24 +0200)]
x86, intel-mid: remove Intel MID specific serial support

Since we have a native 8250 driver carrying the Intel MID serial devices the
specific support is not needed anymore. This patch removes it for Intel MID.

Note that the console device name is changed from ttyMFDx to ttySx.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: 8250_pci: add Intel Penwell ports
Andy Shevchenko [Mon, 23 Feb 2015 14:24:43 +0000 (16:24 +0200)]
serial: 8250_pci: add Intel Penwell ports

Intel Penwell supports 3 HSUART ports which are 8250 compatible. The patch adds
necessary bits to the driver.

The functions have intel_mid_* prefix due to more than one platform will use
this code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agodmaengine: append hsu DMA driver
Andy Shevchenko [Mon, 23 Feb 2015 14:24:42 +0000 (16:24 +0200)]
dmaengine: append hsu DMA driver

The HSU DMA is developed to support High Speed UART controllers found in
particular on Intel MID platforms such as Intel Medfield.

The existing implementation is tighten to the drivers/tty/serial/mfd.c driver
and has a lot of disadvantages. Besides that we would like to get rid of the
old HS UART driver in regarding to extending the 8250 which supports generic
DMAEngine API. That's why the current driver has been developed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: serial: s/Medfile/Medfield
Joseph Kogut [Mon, 23 Feb 2015 00:26:57 +0000 (17:26 -0700)]
tty: serial: s/Medfile/Medfield

Fixed misspelling of 'Medfield'

Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: ar933x_uart: Fix off-by-one for checking valid alias id
Axel Lin [Mon, 23 Feb 2015 03:34:30 +0000 (11:34 +0800)]
serial: ar933x_uart: Fix off-by-one for checking valid alias id

Current code uses the alias id as array subscript of ar933x_console_ports.
So the valid id is 0 ... CONFIG_SERIAL_AR933X_NR_UARTS - 1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: mctrl-gpio: simplify init routine
Uwe Kleine-König [Thu, 12 Feb 2015 14:24:42 +0000 (15:24 +0100)]
serial: mctrl-gpio: simplify init routine

Instead of ignoring errors returned by devm_gpiod_get_index use
devm_gpiod_get_index_optional which results in slightly more strict
error handling which is good.

Also use the fourth parameter to devm_gpiod_get_index_optional to be
able to drop the explicit direction setting.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: mctrl-gpio: don't check for struct mctrl_gpios * to be invalid
Uwe Kleine-König [Thu, 12 Feb 2015 14:24:41 +0000 (15:24 +0100)]
serial: mctrl-gpio: don't check for struct mctrl_gpios * to be invalid

Drivers using mctrl-gpio must not pass invalid values for struct
mctrl_gpios *. All drivers were fixed in this regard and so some checks
can go away or be simplified.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: mxs-auart: properly handle mctrl_gpio failing
Uwe Kleine-König [Thu, 12 Feb 2015 14:24:40 +0000 (15:24 +0100)]
serial: mxs-auart: properly handle mctrl_gpio failing

If mctrl_gpio_init returns an error code this value should be forwarded and
the driver must not simply ignore this failure.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: clps711x: fail if mctrl_gpio_init fails
Uwe Kleine-König [Thu, 12 Feb 2015 14:24:39 +0000 (15:24 +0100)]
serial: clps711x: fail if mctrl_gpio_init fails

mctrl_gpio_init is fully aware of being optional. If it returns an error
code this indicates a real error that must not be ignored.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: atmel: fix error handling when mctrl_gpio_init fails
Uwe Kleine-König [Thu, 12 Feb 2015 14:24:38 +0000 (15:24 +0100)]
serial: atmel: fix error handling when mctrl_gpio_init fails

mctrl_gpio_init at present doesn't return NULL. (It might be used in the
future when no gpios are to be used indicating success.) Properly pass
error returned and also make driver probing fail on error.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: max3100: use msecs_to_jiffies for time conversion
Nicholas Mc Guire [Mon, 9 Feb 2015 14:41:49 +0000 (09:41 -0500)]
tty: max3100: use msecs_to_jiffies for time conversion

This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: imx: Do not store/restore the UBRC register
Fabio Estevam [Sat, 7 Feb 2015 17:46:41 +0000 (15:46 -0200)]
serial: imx: Do not store/restore the UBRC register

UBRC is a read-only register, so we should not store and restore it inside
imx_flush_buffer().

Reported-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: serial/bcm63xx_uart: fix sparse warning
Lad, Prabhakar [Wed, 4 Feb 2015 18:21:22 +0000 (18:21 +0000)]
tty: serial/bcm63xx_uart: fix sparse warning

this patch fixes following sparse warnings:

bcm63xx_uart.c:857:43: warning: Using plain integer as NULL pointer
bcm63xx_uart.c:871:35: warning: Using plain integer as NULL pointer

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: 8250_dw: Add missing MODULE_ALIAS() for module autoloading support
Mika Westerberg [Wed, 4 Feb 2015 13:03:48 +0000 (15:03 +0200)]
serial: 8250_dw: Add missing MODULE_ALIAS() for module autoloading support

Without this the module does not load automatically whenever suitable
platform device appears.

Reported-by: Jerome Blin <jerome.blin@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agosprd_serial: compile sprd_suspend and sprd_resume conditionally
Paul Bolle [Tue, 3 Feb 2015 20:05:50 +0000 (21:05 +0100)]
sprd_serial: compile sprd_suspend and sprd_resume conditionally

Building sprd_serial.o when CONFIG_PM_SLEEP is not defined triggers
these warnings:
    drivers/tty/serial/sprd_serial.c:755:12: warning: ‘sprd_suspend’ defined but not used [-Wunused-function]
     static int sprd_suspend(struct device *dev)
                ^
    drivers/tty/serial/sprd_serial.c:764:12: warning: ‘sprd_resume’ defined but not used [-Wunused-function]
     static int sprd_resume(struct device *dev)
                ^

Let's compile these functions only when CONFIG_PM_SLEEP is defined.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial:imx make of_device_id array const
Sanjeev Sharma [Tue, 3 Feb 2015 10:46:06 +0000 (16:16 +0530)]
serial:imx make of_device_id array const

Make of_device_id array const.

Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: serial: 8250_core: Remove trailing whitespaces
Michal Simek [Tue, 3 Feb 2015 10:01:47 +0000 (11:01 +0100)]
tty: serial: 8250_core: Remove trailing whitespaces

No functional changes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: 8250_pci: convert to dev_pm_ops
Andy Shevchenko [Mon, 2 Feb 2015 12:53:26 +0000 (14:53 +0200)]
serial: 8250_pci: convert to dev_pm_ops

Convert the legacy system PM callbacks to new ones. Meanwhile, remove the
redudant calls to the PCI for changing a power state since it's done by bus
code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agotty: kconfig: remove the superfluous dependency on PPC_OF
Kevin Hao [Sat, 31 Jan 2015 13:47:43 +0000 (21:47 +0800)]
tty: kconfig: remove the superfluous dependency on PPC_OF

In the current kernel, the CONFIG_PPC_OF is always 'y' for the ppc
arch. So we don't need to check it with other ppc specific options.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: core: replace current->state by __set_current_state()
Fabian Frederick [Fri, 20 Feb 2015 18:12:57 +0000 (19:12 +0100)]
serial: core: replace current->state by __set_current_state()

Use helper functions to access current->state.
Direct assignments are prone to races and therefore buggy.

Thanks to Peter Zijlstra for the exact definition of the problem.

Suggested-By: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoserial: pl010 is no longer broken
Arnd Bergmann [Wed, 25 Feb 2015 15:06:09 +0000 (16:06 +0100)]
serial: pl010 is no longer broken

As more ARM platforms are moving into ARCH_MULTIPLATFORM, we can now
have integrator and versatile in the same kernel, and first one selects
this driver, causing a Kconfig warning:

warning: (ARCH_INTEGRATOR_AP) selects SERIAL_AMBA_PL010 which has unmet direct dependencies (TTY && HAS_IOMEM && ARM_AMBA && (BROKEN || !ARCH_VERSATILE))

It turns out that it has not been broken on versatile for a long time,
so we can remove the statement here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
9 years agoLinux 4.0-rc2
Linus Torvalds [Tue, 3 Mar 2015 17:04:59 +0000 (09:04 -0800)]
Linux 4.0-rc2

9 years agodrm/i915: Fix modeset state confusion in the load detect code
Daniel Vetter [Tue, 3 Mar 2015 16:31:21 +0000 (17:31 +0100)]
drm/i915: Fix modeset state confusion in the load detect code

This is a tricky story of the new atomic state handling and the legacy
code fighting over each another. The bug at hand is an underrun of the
framebuffer reference with subsequent hilarity caused by the load
detect code. Which is peculiar since the the exact same code works
fine as the implementation of the legacy setcrtc ioctl.

Let's look at the ingredients:

- Currently our code is a crazy mix of legacy modeset interfaces to
  set the parameters and half-baked atomic state tracking underneath.
  While this transition is going we're using the transitional plane
  helpers to update the atomic side (drm_plane_helper_disable/update
  and friends), i.e. plane->state->fb. Since the state structure owns
  the fb those functions take care of that themselves.

  The legacy state (specifically crtc->primary->fb) is still managed
  by the old code (and mostly by the drm core), with the fb reference
  counting done by callers (core drm for the ioctl or the i915 load
  detect code). The relevant commit is

  commit ea2c67bb4affa84080c616920f3899f123786e56
  Author: Matt Roper <matthew.d.roper@intel.com>
  Date:   Tue Dec 23 10:41:52 2014 -0800

      drm/i915: Move to atomic plane helpers (v9)

- drm_plane_helper_disable has special code to handle multiple calls
  in a row - it checks plane->crtc == NULL and bails out. This is to
  match the proper atomic implementation which needs the crtc to get
  at the implied locking context atomic updates always need. See

  commit acf24a395c5a9290189b080383564437101d411c
  Author: Daniel Vetter <daniel.vetter@ffwll.ch>
  Date:   Tue Jul 29 15:33:05 2014 +0200

      drm/plane-helper: transitional atomic plane helpers

- The universal plane code split out the implicit primary plane from
  the CRTC into it's own full-blown drm_plane object. As part of that
  the setcrtc ioctl (which updated both the crtc mode and primary
  plane) learned to set crtc->primary->crtc on modeset to make sure
  the plane->crtc assignments statate up to date in

  commit e13161af80c185ecd8dc4641d0f5df58f9e3e0af
  Author: Matt Roper <matthew.d.roper@intel.com>
  Date:   Tue Apr 1 15:22:38 2014 -0700

      drm: Add drm_crtc_init_with_planes() (v2)

  Unfortunately we've forgotten to update the load detect code. Which
  wasn't a problem since the load detect modeset is temporary and
  always undone before we drop the locks.

- Finally there is a organically grown history (i.e. don't ask) around
  who sets the legacy plane->fb for the various driver entry points.
  Originally updating that was the drivers duty, but for almost all
  places we've moved that (plus updating the refcounts) into the core.
  Again the exception is the load detect code.

Taking all together the following happens:
- The load detect code doesn't set crtc->primary->crtc. This is only
  really an issue on crtcs never before used or when userspace
  explicitly disabled the primary plane.

- The plane helper glue code short-circuits because of that and leaves
  a non-NULL fb behind in plane->state->fb and plane->fb. The state
  fb isn't a real problem (it's properly refcounted on its own), it's
  just the canary.

- Load detect code drops the reference for that fb, but doesn't set
  plane->fb = NULL. This is ok since it's still living in that old
  world where drivers had to clear the pointer but the core/callers
  handled the refcounting.

- On the next modeset the drm core notices plane->fb and takes care of
  refcounting it properly by doing another unref. This drops the
  refcount to zero, leaving state->plane now pointing at freed memory.

- intel_plane_duplicate_state still assume it owns a reference to that
  very state->fb and bad things start to happen.

Fix this all by applying the same duct-tape as for the legacy setcrtc
ioctl code and set crtc->primary->crtc properly.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reported-and-tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoMerge tag 'gpio-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Mon, 2 Mar 2015 22:13:39 +0000 (14:13 -0800)]
Merge tag 'gpio-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Two GPIO fixes:

   - Fix a translation problem in of_get_named_gpiod_flags()

   - Fix a long standing container_of() mistake in the TPS65912 driver"

* tag 'gpio-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: tps65912: fix wrong container_of arguments
  gpiolib: of: allow of_gpiochip_find_and_xlate to find more than one chip per node

9 years agoMerge branch 'fixes-for-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 2 Mar 2015 22:08:10 +0000 (14:08 -0800)]
Merge branch 'fixes-for-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal

Pull thermal management fixes from Eduardo Valentin:
 "Specifics:

   - Several fixes in tmon tool.

   - Fixes in intel int340x for _ART and _TRT tables.

   - Add id for Avoton SoC into powerclamp driver.

   - Fixes in RCAR thermal driver to remove race conditions and fix fail
     path

   - Fixes in TI thermal driver: removal of unnecessary code and build
     fix if !CONFIG_PM_SLEEP

   - Cleanups in exynos thermal driver

   - Add stubs for include/linux/thermal.h.  Now drivers using thermal
     calls but that also work without CONFIG_THERMAL will be able to
     compile for systems that don't care about thermal.

  Note: I am sending this pull on Rui's behalf while he fixes issues in
  his Linux box"

* 'fixes-for-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal: int340x_thermal: Ignore missing _ART, _TRT tables
  thermal/intel_powerclamp: add id for Avoton SoC
  tools/thermal: tmon: silence 'set but not used' warnings
  tools/thermal: tmon: use pkg-config to determine library dependencies
  tools/thermal: tmon: support cross-compiling
  tools/thermal: tmon: add .gitignore
  tools/thermal: tmon: fixup tui windowing calculations
  tools/thermal: tmon: tui: don't hard-code dialog window size assumptions
  tools/thermal: tmon: add min/max macros
  tools/thermal: tmon: add --target-temp parameter
  thermal: exynos: Clean-up code to use oneline entry for exynos compatible table
  thermal: rcar: Make error and remove paths symmetrical with init
  thermal: rcar: Fix race condition between init and interrupt
  thermal: Introduce dummy functions when thermal is not defined
  ti-soc-thermal: Delete an unnecessary check before the function call "cpufreq_cooling_unregister"
  thermal: ti-soc-thermal: bandgap: Fix build warning if !CONFIG_PM_SLEEP

9 years agoMerge tag 'md/4.0-fixes' of git://neil.brown.name/md
Linus Torvalds [Mon, 2 Mar 2015 22:03:27 +0000 (14:03 -0800)]
Merge tag 'md/4.0-fixes' of git://neil.brown.name/md

Pull md fixes from Neil Brown:
 "Three md fixes:

   - fix a read-balance problem that was reported 2 years ago, but that
     I never noticed the report :-(

   - fix for rare RAID6 problem causing incorrect bitmap updates when
     two devices fail.

   - add __ATTR_PREALLOC annotation now that it is possible"

* tag 'md/4.0-fixes' of git://neil.brown.name/md:
  md: mark some attributes as pre-alloc
  raid5: check faulty flag for array status during recovery.
  md/raid1: fix read balance when a drive is write-mostly.

9 years agoMerge tag 'metag-fixes-v4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhoga...
Linus Torvalds [Mon, 2 Mar 2015 22:02:17 +0000 (14:02 -0800)]
Merge tag 'metag-fixes-v4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag

Pull arch/metag fix from James Hogan:
 "This is just a single patch to fix the KSTK_EIP() and KSTK_ESP()
  macros for metag which have always been erronously returning the PC
  and stack pointer of the task's kernel context rather than from its
  user context saved at entry from userland into the kernel, which
  affects the contents of /proc/<pid>/maps and /proc/<pid>/stat"

* tag 'metag-fixes-v4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  metag: Fix KSTK_EIP() and KSTK_ESP() macros

9 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Mar 2015 20:22:44 +0000 (12:22 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "A CR4-shadow 32-bit init fix, plus two typo fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Init per-cpu shadow copy of CR4 on 32-bit CPUs too
  x86/platform/intel-mid: Fix trivial printk message typo in intel_mid_arch_setup()
  x86/cpu/intel: Fix trivial typo in intel_tlb_table[]

9 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Mar 2015 20:00:25 +0000 (12:00 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fixes from Ingo Molnar:
 "Three clockevents/clocksource driver fixes"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: pxa: Fix section mismatch
  clocksource: mtk: Fix race conditions in probe code
  clockevents: asm9260: Fix compilation error with sparc/sparc64 allyesconfig

9 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Mar 2015 19:56:13 +0000 (11:56 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Two kprobes fixes and a handful of tooling fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tools: Make sparc64 arch point to sparc
  perf symbols: Define EM_AARCH64 for older OSes
  perf top: Fix SIGBUS on sparc64
  perf tools: Fix probing for PERF_FLAG_FD_CLOEXEC flag
  perf tools: Fix pthread_attr_setaffinity_np build error
  perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity_np feature check
  perf bench: Fix order of arguments to memcpy_alloc_mem
  kprobes/x86: Check for invalid ftrace location in __recover_probed_insn()
  kprobes/x86: Use 5-byte NOP when the code might be modified by ftrace

9 years agoMerge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Mar 2015 19:27:04 +0000 (11:27 -0800)]
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fix from Ingo Molnar:
 "An rtmutex deadlock path fixlet"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rtmutex: Set state back to running on error

9 years agoMerge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Sun, 1 Mar 2015 16:41:42 +0000 (17:41 +0100)]
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  - pthread_attr_setaffinity_np() feature detection build fixes (Adrian Hunter, Josh Boyer)

  - Fix probing for PERF_FLAG_FD_CLOEXEC flag (Adrian Hunter)

  - Fix order of arguments to memcpy_alloc_mem in 'perf bench' (Bruce Merry)

  - Sparc64 and Aarch64 build and segfault fixes (David Ahern)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agolocking/rtmutex: Set state back to running on error
Sebastian Andrzej Siewior [Fri, 27 Feb 2015 16:57:09 +0000 (17:57 +0100)]
locking/rtmutex: Set state back to running on error

The "usual" path is:

 - rt_mutex_slowlock()
 - set_current_state()
 - task_blocks_on_rt_mutex() (ret 0)
 - __rt_mutex_slowlock()
   - sleep or not but do return with __set_current_state(TASK_RUNNING)
 - back to caller.

In the early error case where task_blocks_on_rt_mutex() return
-EDEADLK we never change the task's state back to RUNNING. I
assume this is intended. Without this change after ww_mutex
using rt_mutex the selftest passes but later I get plenty of:

  | bad: scheduling from the idle thread!

backtraces.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: afffc6c1805d ("locking/rtmutex: Optimize setting task running after being blocked")
Link: http://lkml.kernel.org/r/1425056229-22326-4-git-send-email-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 28 Feb 2015 18:36:48 +0000 (10:36 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Just general fixes: radeon, i915, atmel, tegra, amdkfd and one core
  fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (28 commits)
  drm: atmel-hlcdc: remove clock polarity from crtc driver
  drm/radeon: only enable DP audio if the monitor supports it
  drm/radeon: fix atom aux payload size check for writes (v2)
  drm/radeon: fix 1 RB harvest config setup for TN/RL
  drm/radeon: enable SRBM timeout interrupt on EG/NI
  drm/radeon: enable SRBM timeout interrupt on SI
  drm/radeon: enable SRBM timeout interrupt on CIK v2
  drm/radeon: dump full IB if we hit a packet error
  drm/radeon: disable mclk switching with 120hz+ monitors
  drm/radeon: use drm_mode_vrefresh() rather than mode->vrefresh
  drm/radeon: enable native backlight control on old macs
  drm/i915: Fix frontbuffer false positve.
  drm/i915: Align initial plane backing objects correctly
  drm/i915: avoid processing spurious/shared interrupts in low-power states
  drm/i915: Check obj->vma_list under the struct_mutex
  drm/i915: Fix a use after free, and unbalanced refcounting
  drm: atmel-hlcdc: remove useless pm_runtime_put_sync in probe
  drm: atmel-hlcdc: reset layer A2Q and UPDATE bits when disabling it
  drm: Fix deadlock due to getconnector locking changes
  drm/i915: Dell Chromebook 11 has PWM backlight
  ...

9 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 28 Feb 2015 18:21:57 +0000 (10:21 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block layer fixes from Jens Axboe:
 "Two smaller fixes for this cycle:

   - A fixup from Keith so that NVMe compiles without BLK_INTEGRITY,
     basically just moving the code around appropriately.

   - A fixup for shm, fixing an oops in shmem_mapping() for mapping with
     no inode.  From Sasha"

[ The shmem fix doesn't look block-layer-related, but fixes a bug that
  happened due to the backing_dev_info removal..  - Linus ]

* 'for-linus' of git://git.kernel.dk/linux-block:
  mm: shmem: check for mapping owner before dereferencing
  NVMe: Fix for BLK_DEV_INTEGRITY not set

9 years agoMerge tag 'xfs-for-linus-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Feb 2015 18:06:33 +0000 (10:06 -0800)]
Merge tag 'xfs-for-linus-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs fixes from Dave Chinner:
 "These are fixes for regressions/bugs introduced in the 4.0 merge cycle
  and problems discovered during the merge window that need to be pushed
  back to stable kernels ASAP.

  This contains:
   - ensure quota type is reset in on-disk dquots
   - fix missing partial EOF block data flush on truncate extension
   - fix transaction leak in error handling for new pnfs block layout
     support
   - add missing target_ip check to RENAME_EXCHANGE"

* tag 'xfs-for-linus-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
  xfs: cancel failed transaction in xfs_fs_commit_blocks()
  xfs: Ensure we have target_ip for RENAME_EXCHANGE
  xfs: ensure truncate forces zeroed blocks to disk
  xfs: Fix quota type in quota structures when reusing quota file

9 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 28 Feb 2015 17:58:03 +0000 (09:58 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "13 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: add missing __PAGETABLE_{PUD,PMD}_FOLDED defines
  mm: page_alloc: revert inadvertent !__GFP_FS retry behavior change
  kernel/sys.c: fix UNAME26 for 4.0
  mm: memcontrol: use "max" instead of "infinity" in control knobs
  zram: use proper type to update max_used_pages
  drivers/rtc/rtc-ds1685.c: fix conditional in ds1685_rtc_sysfs_time_regs_{show,store}
  nilfs2: fix potential memory overrun on inode
  scripts/gdb: add empty package initialization script
  rtc: ds1685: remove superfluous checks for out-of-range u8 values
  rtc: ds1685: fix ds1685_rtc_alarm_irq_enable build error
  memcg: fix low limit calculation
  mm/nommu: fix memory leak
  ocfs2: update web page + git tree in documentation

9 years agomm: add missing __PAGETABLE_{PUD,PMD}_FOLDED defines
Kirill A. Shutemov [Fri, 27 Feb 2015 23:52:12 +0000 (15:52 -0800)]
mm: add missing __PAGETABLE_{PUD,PMD}_FOLDED defines

Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.  Usually, these defines are provided by
<asm-generic/pgtable-nopmd.h> and <asm-generic/pgtable-nopud.h>.

But some architectures fold page table levels in a custom way.  They
need to define these macros themself.  This patch adds missing defines.

The patch fixes mm->nr_pmds underflow and eliminates dead __pmd_alloc()
and __pud_alloc() on architectures without these page table levels.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: page_alloc: revert inadvertent !__GFP_FS retry behavior change
Johannes Weiner [Fri, 27 Feb 2015 23:52:09 +0000 (15:52 -0800)]
mm: page_alloc: revert inadvertent !__GFP_FS retry behavior change

Historically, !__GFP_FS allocations were not allowed to invoke the OOM
killer once reclaim had failed, but nevertheless kept looping in the
allocator.

Commit 9879de7373fc ("mm: page_alloc: embed OOM killing naturally into
allocation slowpath"), which should have been a simple cleanup patch,
accidentally changed the behavior to aborting the allocation at that
point.  This creates problems with filesystem callers (?) that currently
rely on the allocator waiting for other tasks to intervene.

Revert the behavior as it shouldn't have been changed as part of a
cleanup patch.

Fixes: 9879de7373fc ("mm: page_alloc: embed OOM killing naturally into allocation slowpath")
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Dave Chinner <david@fromorbit.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: <stable@vger.kernel.org> [3.19.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agokernel/sys.c: fix UNAME26 for 4.0
Jon DeVree [Fri, 27 Feb 2015 23:52:07 +0000 (15:52 -0800)]
kernel/sys.c: fix UNAME26 for 4.0

There's a uname workaround for broken userspace which can't handle kernel
versions of 3.x.  Update it for 4.x.

Signed-off-by: Jon DeVree <nuxi@vault24.org>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: memcontrol: use "max" instead of "infinity" in control knobs
Johannes Weiner [Fri, 27 Feb 2015 23:52:04 +0000 (15:52 -0800)]
mm: memcontrol: use "max" instead of "infinity" in control knobs

The memcg control knobs indicate the highest possible value using the
symbolic name "infinity", which is long and awkward to type.

Switch to the string "max", which is just as descriptive but shorter and
sweeter.

This changes a user interface, so do it before the release and before
the development flag is dropped from the default hierarchy.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agozram: use proper type to update max_used_pages
Joonsoo Kim [Fri, 27 Feb 2015 23:52:01 +0000 (15:52 -0800)]
zram: use proper type to update max_used_pages

max_used_pages is defined as atomic_long_t so we need to use unsigned
long to keep temporary value for it rather than int which is smaller
than unsigned long in a 64 bit system.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agodrivers/rtc/rtc-ds1685.c: fix conditional in ds1685_rtc_sysfs_time_regs_{show,store}
Joshua Kinard [Fri, 27 Feb 2015 23:51:59 +0000 (15:51 -0800)]
drivers/rtc/rtc-ds1685.c: fix conditional in ds1685_rtc_sysfs_time_regs_{show,store}

Fix a conditional statement checking for NULL in both
ds1685_rtc_sysfs_time_regs_show and ds1685_rtc_sysfs_time_regs_store
that was using a logical AND when it should be using a logical OR so
that we fail out of the function properly if the condition ever
evaluates to true.

Fixes: aaaf5fbf56f1 ("rtc: add driver for DS1685 family of real time clocks")
Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agonilfs2: fix potential memory overrun on inode
Ryusuke Konishi [Fri, 27 Feb 2015 23:51:56 +0000 (15:51 -0800)]
nilfs2: fix potential memory overrun on inode

Each inode of nilfs2 stores a root node of a b-tree, and it turned out to
have a memory overrun issue:

Each b-tree node of nilfs2 stores a set of key-value pairs and the number
of them (in "bn_nchildren" member of nilfs_btree_node struct), as well as
a few other "bn_*" members.

Since the value of "bn_nchildren" is used for operations on the key-values
within the b-tree node, it can cause memory access overrun if a large
number is incorrectly set to "bn_nchildren".

For instance, nilfs_btree_node_lookup() function determines the range of
binary search with it, and too large "bn_nchildren" leads
nilfs_btree_node_get_key() in that function to overrun.

As for intermediate b-tree nodes, this is prevented by a sanity check
performed when each node is read from a drive, however, no sanity check
has been done for root nodes stored in inodes.

This patch fixes the issue by adding missing sanity check against b-tree
root nodes so that it's called when on-memory inodes are read from ifile,
inode metadata file.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoscripts/gdb: add empty package initialization script
Jan Kiszka [Fri, 27 Feb 2015 23:51:53 +0000 (15:51 -0800)]
scripts/gdb: add empty package initialization script

This got lost during the initial merge process: Python requires an
__init__.py script, even if empty, in order to accept a directory as
package.  Add it, this time as a non-empty file.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agortc: ds1685: remove superfluous checks for out-of-range u8 values
Geert Uytterhoeven [Fri, 27 Feb 2015 23:51:51 +0000 (15:51 -0800)]
rtc: ds1685: remove superfluous checks for out-of-range u8 values

drivers/rtc/rtc-ds1685.c: In function `ds1685_rtc_read_alarm':
drivers/rtc/rtc-ds1685.c:402: warning: comparison is always true due to limited range of data type
drivers/rtc/rtc-ds1685.c:409: warning: comparison is always true due to limited range of data type
drivers/rtc/rtc-ds1685.c:416: warning: comparison is always true due to limited range of data type
drivers/rtc/rtc-ds1685.c: In function `ds1685_rtc_set_alarm':
drivers/rtc/rtc-ds1685.c:475: warning: comparison is always true due to limited range of data type
drivers/rtc/rtc-ds1685.c:478: warning: comparison is always true due to limited range of data type
drivers/rtc/rtc-ds1685.c:481: warning: comparison is always true due to limited range of data type

u8 cannot contain a value larger than 0xff, hence drop the checks.
Wrapping the checks in unlikely() indicated some sense of humor, though ;-)

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Joshua Kinard <kumba@gentoo.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agortc: ds1685: fix ds1685_rtc_alarm_irq_enable build error
Arnd Bergmann [Fri, 27 Feb 2015 23:51:48 +0000 (15:51 -0800)]
rtc: ds1685: fix ds1685_rtc_alarm_irq_enable build error

The newly added ds1685 driver causes a build error when enabled without
CONFIG_RTC_INTF_DEV:

  drivers/rtc/rtc-ds1685.c:919:22: error: 'ds1685_rtc_alarm_irq_enable' undeclared here (not in a function)
    .alarm_irq_enable = ds1685_rtc_alarm_irq_enable,

Apparently the driver was incorrectly changed to reflect the interface
change from 16380c153a69c ("RTC: Convert rtc drivers to use the
alarm_irq_enable method"), which removed the respective #ifdef from all
other rtc drivers.

This does the same change that was merged for the other drivers before and
removes the #ifdef, allowing the interrupts to be enabled through the
in-kernel rtc interface independent of the existence of /dev/rtc.

Fixes: aaaf5fbf56f ("rtc: add driver for DS1685 family of real time clocks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Joshua Kinard <kumba@gentoo.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomemcg: fix low limit calculation
Michal Hocko [Fri, 27 Feb 2015 23:51:46 +0000 (15:51 -0800)]
memcg: fix low limit calculation

A memcg is considered low limited even when the current usage is equal to
the low limit.  This leads to interesting side effects e.g.
groups/hierarchies with no memory accounted are considered protected and
so the reclaim will emit MEMCG_LOW event when encountering them.

Another and much bigger issue was reported by Joonsoo Kim.  He has hit a
NULL ptr dereference with the legacy cgroup API which even doesn't have
low limit exposed.  The limit is 0 by default but the initial check fails
for memcg with 0 consumption and parent_mem_cgroup() would return NULL if
use_hierarchy is 0 and so page_counter_read would try to dereference NULL.

I suppose that the current implementation is just an overlook because the
documentation in Documentation/cgroups/unified-hierarchy.txt says:

  "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"

Fix the usage and the low limit comparision in mem_cgroup_low accordingly.

Fixes: 241994ed8649 (mm: memcontrol: default hierarchy interface for memory)
Reported-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm/nommu: fix memory leak
Joonsoo Kim [Fri, 27 Feb 2015 23:51:43 +0000 (15:51 -0800)]
mm/nommu: fix memory leak

Maxime reported the following memory leak regression due to commit
dbc8358c7237 ("mm/nommu: use alloc_pages_exact() rather than its own
implementation").

On v3.19, I am facing a memory leak.  Each time I run a command one page
is lost.  Here an example with busybox's free command:

  / # free
               total       used       free     shared    buffers     cached
  Mem:          7928       1972       5956          0          0        492
  -/+ buffers/cache:       1480       6448
  / # free
               total       used       free     shared    buffers     cached
  Mem:          7928       1976       5952          0          0        492
  -/+ buffers/cache:       1484       6444
  / # free
               total       used       free     shared    buffers     cached
  Mem:          7928       1980       5948          0          0        492
  -/+ buffers/cache:       1488       6440
  / # free
               total       used       free     shared    buffers     cached
  Mem:          7928       1984       5944          0          0        492
  -/+ buffers/cache:       1492       6436
  / # free
               total       used       free     shared    buffers     cached
  Mem:          7928       1988       5940          0          0        492
  -/+ buffers/cache:       1496       6432

At some point, the system fails to sastisfy 256KB allocations:

  free: page allocation failure: order:6, mode:0xd0
  CPU: 0 PID: 67 Comm: free Not tainted 3.19.0-05389-gacf2cf1-dirty #64
  Hardware name: STM32 (Device Tree Support)
    show_stack+0xb/0xc
    warn_alloc_failed+0x97/0xbc
    __alloc_pages_nodemask+0x295/0x35c
    __get_free_pages+0xb/0x24
    alloc_pages_exact+0x19/0x24
    do_mmap_pgoff+0x423/0x658
    vm_mmap_pgoff+0x3f/0x4e
    load_flat_file+0x20d/0x4f8
    load_flat_binary+0x3f/0x26c
    search_binary_handler+0x51/0xe4
    do_execveat_common+0x271/0x35c
    do_execve+0x19/0x1c
    ret_fast_syscall+0x1/0x4a
  Mem-info:
  Normal per-cpu:
  CPU    0: hi:    0, btch:   1 usd:   0
  active_anon:0 inactive_anon:0 isolated_anon:0
   active_file:0 inactive_file:0 isolated_file:0
   unevictable:123 dirty:0 writeback:0 unstable:0
   free:1515 slab_reclaimable:17 slab_unreclaimable:139
   mapped:0 shmem:0 pagetables:0 bounce:0
   free_cma:0
  Normal free:6060kB min:352kB low:440kB high:528kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:492kB isolated(anon):0ks
  lowmem_reserve[]: 0 0
  Normal: 23*4kB (U) 22*8kB (U) 24*16kB (U) 23*32kB (U) 23*64kB (U) 23*128kB (U) 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 6060kB
  123 total pagecache pages
  2048 pages of RAM
  1538 free pages
  66 reserved pages
  109 slab pages
  -46 pages shared
  0 pages swap cached
  nommu: Allocation of length 221184 from process 67 (free) failed
  Normal per-cpu:
  CPU    0: hi:    0, btch:   1 usd:   0
  active_anon:0 inactive_anon:0 isolated_anon:0
   active_file:0 inactive_file:0 isolated_file:0
   unevictable:123 dirty:0 writeback:0 unstable:0
   free:1515 slab_reclaimable:17 slab_unreclaimable:139
   mapped:0 shmem:0 pagetables:0 bounce:0
   free_cma:0
  Normal free:6060kB min:352kB low:440kB high:528kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:492kB isolated(anon):0ks
  lowmem_reserve[]: 0 0
  Normal: 23*4kB (U) 22*8kB (U) 24*16kB (U) 23*32kB (U) 23*64kB (U) 23*128kB (U) 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 6060kB
  123 total pagecache pages
  Unable to allocate RAM for process text/data, errno 12 SEGV

This problem happens because we allocate ordered page through
__get_free_pages() in do_mmap_private() in some cases and we try to free
individual pages rather than ordered page in free_page_series().  In
this case, freeing pages whose refcount is not 0 won't be freed to the
page allocator so memory leak happens.

To fix the problem, this patch changes __get_free_pages() to
alloc_pages_exact() since alloc_pages_exact() returns
physically-contiguous pages but each pages are refcounted.

Fixes: dbc8358c7237 ("mm/nommu: use alloc_pages_exact() rather than its own implementation").
Reported-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Tested-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <stable@vger.kernel.org> [3.19]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoocfs2: update web page + git tree in documentation
Mark Fasheh [Fri, 27 Feb 2015 23:51:40 +0000 (15:51 -0800)]
ocfs2: update web page + git tree in documentation

We (the Ocfs2 project) recently moved the location of our ocfs2-tools
git tree and project web page.  The pertinent discussion can be seen
here:

  https://oss.oracle.com/pipermail/ocfs2-devel/2015-February/010579.html

The following patch updates the Ocfs2 documentation in MAINTAINERS,
ocfs2.txt, and dlmfs.txt.  I added our new official web page, changed
the location of our tools git tree and removed the link to Joel's
ancient kernel git tree - Andrew has handled our patches for a while
now.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agox86: Init per-cpu shadow copy of CR4 on 32-bit CPUs too
Steven Rostedt [Fri, 27 Feb 2015 19:50:19 +0000 (14:50 -0500)]
x86: Init per-cpu shadow copy of CR4 on 32-bit CPUs too

Commit:

   1e02ce4cccdc ("x86: Store a per-cpu shadow copy of CR4")

added a shadow CR4 such that reads and writes that do not
modify the CR4 execute much faster than always reading the
register itself.

The change modified cpu_init() in common.c, so that the
shadow CR4 gets initialized before anything uses it.

Unfortunately, there's two cpu_init()s in common.c. There's
one for 64-bit and one for 32-bit. The commit only added
the shadow init to the 64-bit path, but the 32-bit path
needs the init too.

Link: http://lkml.kernel.org/r/20150227125208.71c36402@gandalf.local.home
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150227145019.2bdd4354@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoMerge branch 'linus' into x86/urgent, to merge dependent patch
Ingo Molnar [Sat, 28 Feb 2015 07:03:10 +0000 (08:03 +0100)]
Merge branch 'linus' into x86/urgent, to merge dependent patch

Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoMerge branch 'tmon-fixes' of .git into next
Zhang Rui [Sat, 28 Feb 2015 06:07:03 +0000 (14:07 +0800)]
Merge branch 'tmon-fixes' of .git into next

9 years agothermal: int340x_thermal: Ignore missing _ART, _TRT tables
Srinivas Pandruvada [Thu, 26 Feb 2015 02:31:50 +0000 (18:31 -0800)]
thermal: int340x_thermal: Ignore missing _ART, _TRT tables

It is possible that _ART/_TRT tables are missing or have errors.
Ignore those failures, as INT3400 thermal zone is still required
for _OSC or mode switch.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agothermal/intel_powerclamp: add id for Avoton SoC
Miguel Bernal Marin [Thu, 19 Feb 2015 18:40:58 +0000 (12:40 -0600)]
thermal/intel_powerclamp: add id for Avoton SoC

Enable Intel Powerclamp driver on Atom* Processor C2000 Product
Family for Microservers (Avoton). Avoton - SoCs for micro-servers
has package C-states which can be used for idle injection.

Reported-by: Jose Navarro <jose.navarro@intel.com>
Suggested-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Tested-by: Jose Carlos Venegas Munoz <jos.c.venegas.munoz@intel.com>
Signed-off-by: Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: silence 'set but not used' warnings
Brian Norris [Wed, 18 Feb 2015 02:18:36 +0000 (18:18 -0800)]
tools/thermal: tmon: silence 'set but not used' warnings

gcc complains about the 'cols' variable being unused. This is
unavoidable, given the ncurses getmaxyx() macro-based API, which wants
to assign to a variable directly, even when we're not going to use it.

Warning:

    gcc -O1 -Wall -Wshadow -W -Wformat -Wimplicit-function-declaration -Wimplicit-int -fstack-protector -D VERSION=\"1.0\"   -c -o tui.o tui.c
    tui.c: In function ‘show_dialogue’:
    tui.c:288:12: warning: variable ‘cols’ set but not used [-Wunused-but-set-variable]
      int rows, cols;
                ^

So, add a hack to get rid of that warning.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: use pkg-config to determine library dependencies
Brian Norris [Wed, 18 Feb 2015 02:18:35 +0000 (18:18 -0800)]
tools/thermal: tmon: use pkg-config to determine library dependencies

Some distros (e.g., Arch Linux) don't package the tinfo library
separately from ncurses, so don't unconditionally include it. Instead,
use pkg-config.

The $(STATIC) ugliness is to handle the reported build case from commit
6b533269fb25 ("tools/thermal: tmon: fix compilation errors when building
statically"), where a developer wants to be able to build with:

  make LDFLAGS=-static

which requires an additional pkg-config flag.

Finally, support a lowest common denominator fallback (-lpanel
-lncurses) for build systems that don't have pkg-config entries for
ncurses.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: support cross-compiling
Brian Norris [Wed, 18 Feb 2015 02:18:34 +0000 (18:18 -0800)]
tools/thermal: tmon: support cross-compiling

We might want to prepare CFLAGS outside of this Makefile, so don't
overwrite its initial value.

Then, support $(CROSS_COMPILE), so we can use a cross-compile toolchain.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: add .gitignore
Brian Norris [Wed, 18 Feb 2015 02:18:33 +0000 (18:18 -0800)]
tools/thermal: tmon: add .gitignore

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: fixup tui windowing calculations
Brian Norris [Wed, 18 Feb 2015 02:18:32 +0000 (18:18 -0800)]
tools/thermal: tmon: fixup tui windowing calculations

The number of rows in the dialog vary according to the number of cooling
devices. However, some of the windowing computations were assuming a
fixed number of rows. This computation is OK when we have between 4 and
9 cooling devices (and they wrap to the next column), but with fewer
devices, we end up printing off the end of the window.

This unifies the row computation into a single function and uses that
throughout the TUI code. This also accounts for increasing the number of
rows when there are more than 9 total cooling devices.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: tui: don't hard-code dialog window size assumptions
Brian Norris [Wed, 18 Feb 2015 02:18:31 +0000 (18:18 -0800)]
tools/thermal: tmon: tui: don't hard-code dialog window size assumptions

We can use the ncurses API to get the number of rows.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: add min/max macros
Brian Norris [Wed, 18 Feb 2015 02:18:30 +0000 (18:18 -0800)]
tools/thermal: tmon: add min/max macros

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agotools/thermal: tmon: add --target-temp parameter
Brian Norris [Wed, 18 Feb 2015 02:18:29 +0000 (18:18 -0800)]
tools/thermal: tmon: add --target-temp parameter

If we launch in daemon mode (--daemon), we don't have the ncurses UI,
but we might want to set the target temperature still. For example,
someone might stick the following in their boot script:

  tmon --control intel_powerclamp --target-temp 90 --log --daemon

This would turn on CPU idle injection when we're around 90 degrees
celsius, and would log temperature and throttling info to
/var/tmp/tmon.log.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Sat, 28 Feb 2015 00:18:33 +0000 (16:18 -0800)]
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "The arm-soc bug fixes this time around are mostly for the omap
  platform, coming from a pull request from Tony Lindgren and are almost
  entirely fixing dts files.

  The other two changes enable support for the shmobile platform in
  generic armv7 kernels and change some properties in the ARM64
  reference board dts files"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: multi_v7_defconfig: Enable shmobile platforms
  arm64: Add L2 cache topology to ARM Ltd boards/models
  ARM: dts: am335x-bone*: usb0 is hardwired for peripheral
  ARM: dts: dra7x-evm: beagle-x15: Fix USB Host
  ARM: omap2plus_defconfig: Fix SATA boot
  ARM: omap2plus_defconfig: Enable OMAP NAND BCH driver
  ARM: dts: dra7: Correct the dma controller's property names
  ARM: dts: omap5: Correct the dma controller's property names
  ARM: dts: omap4: Correct the dma controller's property names
  ARM: dts: omap3: Correct the dma controller's property names
  ARM: dts: omap2: Correct the dma controller's property names
  ARM: dts: am437x-idk: fix sleep pinctrl state
  ARM: omap2plus_defconfig: enable TPS62362 regulator
  ARM: dts: am437x-idk: fix TPS62362 i2c bus
  ARM: dts: n900: Fix offset for smc91x ethernet
  ARM: dts: n900: fix i2c bus numbering
  ARM: dts: Fix USB dts configuration for dm816x
  ARM: dts: OMAP5: Fix SATA PHY node
  ARM: dts: DRA7: Fix SATA PHY node

9 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 28 Feb 2015 00:09:37 +0000 (16:09 -0800)]
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:
 "Various arm64 fixes:
   - ftrace branch generation fix
   - branch instruction encoding fix
   - include files, guards and unused prototypes clean-up
   - minor VDSO ABI fix (clock_getres)
   - PSCI functions moved to .S to avoid compilation error with gcc 5
   - pte_modify fix to not ignore the mapping type
   - crypto: AES interleaved increased to 4x (for performance reasons)
   - text patching fix for modules
   - swiotlb increased back to 64MB
   - copy_siginfo_to_user32() fix for big endian"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: cpuidle: add asm/proc-fns.h inclusion
  arm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian
  arm64: Increase the swiotlb buffer size 64MB
  arm64: Fix text patching logic when using fixmap
  arm64: crypto: increase AES interleave to 4x
  arm64: enable PTE type bit in the mask for pte_modify
  arm64: mm: remove unused functions and variable protoypes
  arm64: psci: move psci firmware calls out of line
  arm64: vdso: minor ABI fix for clock_getres
  arm64: guard asm/assembler.h against multiple inclusions
  arm64: insn: fix compare-and-branch encodings
  arm64: ftrace: fix ftrace_modify_graph_caller for branch replace

9 years agoMerge tag 'renesas-sh-drivers-for-v4.0' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Feb 2015 00:08:45 +0000 (16:08 -0800)]
Merge tag 'renesas-sh-drivers-for-v4.0' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas

Pull SH driver fix from Simon Horman:
 "Disable PM runtime for multi-platform r8a7740 with genpd"

* tag 'renesas-sh-drivers-for-v4.0' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  drivers: sh: Disable PM runtime for multi-platform r8a7740 with genpd

9 years agoarm64: cpuidle: add asm/proc-fns.h inclusion
Lorenzo Pieralisi [Fri, 27 Feb 2015 17:54:31 +0000 (17:54 +0000)]
arm64: cpuidle: add asm/proc-fns.h inclusion

ARM64 CPUidle driver requires the cpu_do_idle function so that it can
be used to enter the shallowest idle state, and it is declared in
asm/proc-fns.h.

The current ARM64 CPUidle driver does not include asm/proc-fns.h
explicitly and it has so far relied on implicit inclusion from other
header files.

Owing to some header dependencies reshuffling this currently triggers
build failures when CONFIG_ARM64_64K_PAGES=y:

drivers/cpuidle/cpuidle-arm64.c: In function "arm64_enter_idle_state"
drivers/cpuidle/cpuidle-arm64.c:42:3: error: implicit declaration of
function "cpu_do_idle" [-Werror=implicit-function-declaration]
   cpu_do_idle();
   ^

This patch adds the explicit inclusion of the asm/proc-fns.h header file
in the arm64 asm/cpuidle.h header file, so that the build breakage is fixed
and the required header inclusion is added to the appropriate arch back-end
CPUidle header, already included by the CPUidle arm64 driver, where
CPUidle arch related function declarations belong.

Reported-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian
Catalin Marinas [Mon, 23 Feb 2015 15:13:40 +0000 (15:13 +0000)]
arm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian

The native (64-bit) sigval_t union contains sival_int (32-bit) and
sival_ptr (64-bit). When a compat application invokes a syscall that
takes a sigval_t value (as part of a larger structure, e.g.
compat_sys_mq_notify, compat_sys_timer_create), the compat_sigval_t
union is converted to the native sigval_t with sival_int overlapping
with either the least or the most significant half of sival_ptr,
depending on endianness. When the corresponding signal is delivered to a
compat application, on big endian the current (compat_uptr_t)sival_ptr
cast always returns 0 since sival_int corresponds to the top part of
sival_ptr. This patch fixes copy_siginfo_to_user32() so that sival_int
is copied to the compat_siginfo_t structure.

Cc: <stable@vger.kernel.org>
Reported-by: Bamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Tested-by: Bamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: Increase the swiotlb buffer size 64MB
Catalin Marinas [Thu, 5 Feb 2015 18:01:53 +0000 (18:01 +0000)]
arm64: Increase the swiotlb buffer size 64MB

With commit 3690951fc6d4 (arm64: Use swiotlb late initialisation), the
swiotlb buffer size is limited to MAX_ORDER_NR_PAGES. However, there are
platforms with 32-bit only devices that require bounce buffering via
swiotlb. This patch changes the swiotlb initialisation to an early 64MB
memblock allocation. In order to get the swiotlb buffer correctly
allocated (via memblock_virt_alloc_low_nopanic), this patch also defines
ARCH_LOW_ADDRESS_LIMIT to the maximum physical address capable of 32-bit
DMA.

Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoMerge branch 'drm-atmel-hlcdc-fixes' of git://github.com/bbrezillon/linux-at91 into...
Dave Airlie [Fri, 27 Feb 2015 00:31:40 +0000 (10:31 +1000)]
Merge branch 'drm-atmel-hlcdc-fixes' of git://github.com/bbrezillon/linux-at91 into drm-fixes

minor atmel hclcdc fixes.

* 'drm-atmel-hlcdc-fixes' of git://github.com/bbrezillon/linux-at91:
  drm: atmel-hlcdc: remove clock polarity from crtc driver
  drm: atmel-hlcdc: remove useless pm_runtime_put_sync in probe
  drm: atmel-hlcdc: reset layer A2Q and UPDATE bits when disabling it

9 years agoMerge tag 'drm-intel-fixes-2015-02-26' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 27 Feb 2015 00:30:07 +0000 (10:30 +1000)]
Merge tag 'drm-intel-fixes-2015-02-26' of git://anongit.freedesktop.org/drm-intel into drm-fixes

First batch of fixes for v4.0-rc, plenty of cc: stable material.

* tag 'drm-intel-fixes-2015-02-26' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Fix frontbuffer false positve.
  drm/i915: Align initial plane backing objects correctly
  drm/i915: avoid processing spurious/shared interrupts in low-power states
  drm/i915: Check obj->vma_list under the struct_mutex
  drm/i915: Fix a use after free, and unbalanced refcounting
  drm/i915: Dell Chromebook 11 has PWM backlight
  drm/i915/skl: handle all pixel formats in skylake_update_primary_plane()
  drm/i915/bdw: PCI IDs ending in 0xb are ULT.

9 years agoMerge branch 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 27 Feb 2015 00:29:14 +0000 (10:29 +1000)]
Merge branch 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

misc radeon fixes.

* 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: only enable DP audio if the monitor supports it
  drm/radeon: fix atom aux payload size check for writes (v2)
  drm/radeon: fix 1 RB harvest config setup for TN/RL
  drm/radeon: enable SRBM timeout interrupt on EG/NI
  drm/radeon: enable SRBM timeout interrupt on SI
  drm/radeon: enable SRBM timeout interrupt on CIK v2
  drm/radeon: dump full IB if we hit a packet error
  drm/radeon: disable mclk switching with 120hz+ monitors
  drm/radeon: use drm_mode_vrefresh() rather than mode->vrefresh
  drm/radeon: enable native backlight control on old macs

9 years agoMerge tag 'hwmon-for-linus-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 26 Feb 2015 23:23:02 +0000 (15:23 -0800)]
Merge tag 'hwmon-for-linus-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Add missing return value check to ads7828 driver"

* tag 'hwmon-for-linus-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ads7828) Check return value of devm_regmap_init_i2c

9 years agoMerge tag 'sound-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Thu, 26 Feb 2015 18:55:19 +0000 (10:55 -0800)]
Merge tag 'sound-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Most of changes in this pull request are about the fixes of crash of
  FireWire drivers at hot-unplugging.  In addition, there are a few
  HD-audio fixes (removal of wrong static, a pin quirk for an ASUS mobo,
  a regression fix for runtime PM on Panther Point) and a long-standing
  (but fairly minor) bug of PCM core"

* tag 'sound-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Disable runtime PM for Panther Point again
  ALSA: hda: controller code - do not export static functions
  ALSA: pcm: Don't leave PREPARED state after draining
  ALSA: fireworks/bebob/dice/oxfw: make it possible to shutdown safely
  ALSA: fireworks/bebob/dice/oxfw: allow stream destructor after releasing runtime
  ALSA: firewire-lib: remove reference counting
  ALSA: fireworks/bebob/dice/oxfw: add reference-counting for FireWire unit
  ALSA: hda - Add pin configs for ASUS mobo with IDT 92HD73XX codec
  ALSA: firewire-lib: fix an unexpected byte sequence for micro sign

9 years agoarm64: Fix text patching logic when using fixmap
Marc Zyngier [Tue, 24 Feb 2015 16:30:21 +0000 (16:30 +0000)]
arm64: Fix text patching logic when using fixmap

Patch 2f896d586610 ("arm64: use fixmap for text patching") changed
the way we patch the kernel text, using a fixmap when the kernel or
modules are flagged as read only.

Unfortunately, a flaw in the logic makes it fall over when patching
modules without CONFIG_DEBUG_SET_MODULE_RONX enabled:

[...]
[   32.032636] Call trace:
[   32.032716] [<fffffe00003da0dc>] __copy_to_user+0x2c/0x60
[   32.032837] [<fffffe0000099f08>] __aarch64_insn_write+0x94/0xf8
[   32.033027] [<fffffe000009a0a0>] aarch64_insn_patch_text_nosync+0x18/0x58
[   32.033200] [<fffffe000009c3ec>] ftrace_modify_code+0x58/0x84
[   32.033363] [<fffffe000009c4e4>] ftrace_make_nop+0x3c/0x58
[   32.033532] [<fffffe0000164420>] ftrace_process_locs+0x3d0/0x5c8
[   32.033709] [<fffffe00001661cc>] ftrace_module_init+0x28/0x34
[   32.033882] [<fffffe0000135148>] load_module+0xbb8/0xfc4
[   32.034044] [<fffffe0000135714>] SyS_finit_module+0x94/0xc4
[...]

This is triggered by the use of virt_to_page() on a module address,
which ends to pointing to Nowhereland if you're lucky, or corrupt
your precious data if not.

This patch fixes the logic by mimicking what is done on arm:
- If we're patching a module and CONFIG_DEBUG_SET_MODULE_RONX is set,
  use vmalloc_to_page().
- If we're patching the kernel and CONFIG_DEBUG_RODATA is set,
  use virt_to_page().
- Otherwise, use the provided address, as we can write to it directly.

Tested on 4.0-rc1 as a KVM guest.

Reported-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Laura Abbott <lauraa@codeaurora.org>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Thu, 26 Feb 2015 18:34:24 +0000 (10:34 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Pull btrfs fix from Chris Mason:
 "I'm still testing more fixes, but I wanted to get out the fix for the
  btrfs raid5/6 memory corruption I mentioned in my merge window pull"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix allocation size calculations in alloc_btrfs_bio

9 years agoarm64: crypto: increase AES interleave to 4x
Ard Biesheuvel [Thu, 19 Feb 2015 17:25:16 +0000 (17:25 +0000)]
arm64: crypto: increase AES interleave to 4x

This patch increases the interleave factor for parallel AES modes
to 4x. This improves performance on Cortex-A57 by ~35%. This is
due to the 3-cycle latency of AES instructions on the A57's
relatively deep pipeline (compared to Cortex-A53 where the AES
instruction latency is only 2 cycles).

At the same time, disable inline expansion of the core AES functions,
as the performance benefit of this feature is negligible.

  Measured on AMD Seattle (using tcrypt.ko mode=500 sec=1):

  Baseline (2x interleave, inline expansion)
  ------------------------------------------
  testing speed of async cbc(aes) (cbc-aes-ce) decryption
  test 4 (128 bit key, 8192 byte blocks): 95545 operations in 1 seconds
  test 14 (256 bit key, 8192 byte blocks): 68496 operations in 1 seconds

  This patch (4x interleave, no inline expansion)
  -----------------------------------------------
  testing speed of async cbc(aes) (cbc-aes-ce) decryption
  test 4 (128 bit key, 8192 byte blocks): 124735 operations in 1 seconds
  test 14 (256 bit key, 8192 byte blocks): 92328 operations in 1 seconds

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: enable PTE type bit in the mask for pte_modify
Feng Kan [Tue, 24 Feb 2015 23:40:21 +0000 (15:40 -0800)]
arm64: enable PTE type bit in the mask for pte_modify

Caught during Trinity testing. The pte_modify does not allow
modification for PTE type bit. This cause the test to hang
the system. It is found that the PTE can't transit from an
inaccessible page (b00) to a valid page (b11) because the mask
does not allow it. This happens when a big block of mmaped
memory is set the PROT_NONE, then the a small piece is broken
off and set to PROT_WRITE | PROT_READ cause a huge page split.

Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: mm: remove unused functions and variable protoypes
Yingjoe Chen [Wed, 25 Feb 2015 02:47:45 +0000 (10:47 +0800)]
arm64: mm: remove unused functions and variable protoypes

The functions __cpu_flush_user_tlb_range and __cpu_flush_kern_tlb_range
were removed in commit fa48e6f780 'arm64: mm: Optimise tlb flush logic
where we have >4K granule'. Global variable cpu_tlb was never used in
arm64.

Remove them.

Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: psci: move psci firmware calls out of line
Will Deacon [Wed, 25 Feb 2015 12:10:35 +0000 (12:10 +0000)]
arm64: psci: move psci firmware calls out of line

An arm64 allmodconfig fails to build with GCC 5 due to __asmeq
assertions in the PSCI firmware calling code firing due to mcount
preambles breaking our assumptions about register allocation of function
arguments:

  /tmp/ccDqJsJ6.s: Assembler messages:
  /tmp/ccDqJsJ6.s:60: Error: .err encountered
  /tmp/ccDqJsJ6.s:61: Error: .err encountered
  /tmp/ccDqJsJ6.s:62: Error: .err encountered
  /tmp/ccDqJsJ6.s:99: Error: .err encountered
  /tmp/ccDqJsJ6.s:100: Error: .err encountered
  /tmp/ccDqJsJ6.s:101: Error: .err encountered

This patch fixes the issue by moving the PSCI calls out-of-line into
their own assembly files, which are safe from the compiler's meddling
fingers.

Reported-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoarm64: vdso: minor ABI fix for clock_getres
Nathan Lynch [Tue, 24 Feb 2015 23:21:07 +0000 (17:21 -0600)]
arm64: vdso: minor ABI fix for clock_getres

The vdso implementation of clock_getres currently returns 0 (success)
whenever a null timespec is provided by the caller, regardless of the
clock id supplied.

This behavior is incorrect.  It should fall back to syscall when an
unrecognized clock id is passed, even when the timespec argument is
null.  This ensures that clock_getres always returns an error for
invalid clock ids.

Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
9 years agoARM: multi_v7_defconfig: Enable shmobile platforms
Geert Uytterhoeven [Tue, 24 Feb 2015 14:14:45 +0000 (15:14 +0100)]
ARM: multi_v7_defconfig: Enable shmobile platforms

Enable support for shmobile platforms that became multi-platform aware.
Several non-critical drivers and subsystems are built as modules, to keep
kernel size reasonable.

Tested on:
  - r8a73a4/ape6evm:
      - U-Boot fails with "Error: unrecognized/unsupported machine ID",
      - kexec works.
  - r8a7740/armadillo:
      - Hermit boot loader fails (larger image, more memory corruption),
      - kexec works.
  - r8a7791/koelsch,
  - sh73a0/kzm9g:
      - zImage+DTB from U-Boot needs CONFIG_ARM_ATAG_DTB_COMPAT=n,
      - kexec works.
  - am335x/boneblack.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
9 years agodrm: atmel-hlcdc: remove clock polarity from crtc driver
Nicolas Ferre [Wed, 25 Feb 2015 17:44:51 +0000 (18:44 +0100)]
drm: atmel-hlcdc: remove clock polarity from crtc driver

Remove this configuration bit in crtc driver as the rising edge clock is widely
used.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
9 years agodrm/radeon: only enable DP audio if the monitor supports it
Alex Deucher [Mon, 23 Feb 2015 22:45:54 +0000 (17:45 -0500)]
drm/radeon: only enable DP audio if the monitor supports it

We were enabling DP secondary streams even if the monitor
didn't support them.  Fixes display problems on some DP
monitors.

Tested-by: Jim Boz <jim876@xs4all.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: fix atom aux payload size check for writes (v2)
Alex Deucher [Fri, 20 Feb 2015 16:51:38 +0000 (11:51 -0500)]
drm/radeon: fix atom aux payload size check for writes (v2)

The atom aux param interface only supports 4 bits for
the total write transfer size (header + payload).  This
limits us to 12 bytes of payload rather than 16.  Add a
check for this. Reads are not affected.

v2: switch to WARN_ON_ONCE

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: fix 1 RB harvest config setup for TN/RL
Alex Deucher [Thu, 19 Feb 2015 21:02:15 +0000 (16:02 -0500)]
drm/radeon: fix 1 RB harvest config setup for TN/RL

The logic was reversed from what the hw actually exposed.
Fixes graphics corruption in certain harvest configurations.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
9 years agodrm/radeon: enable SRBM timeout interrupt on EG/NI
Christian König [Wed, 18 Feb 2015 12:19:28 +0000 (13:19 +0100)]
drm/radeon: enable SRBM timeout interrupt on EG/NI

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: enable SRBM timeout interrupt on SI
Christian König [Wed, 18 Feb 2015 12:19:27 +0000 (13:19 +0100)]
drm/radeon: enable SRBM timeout interrupt on SI

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: enable SRBM timeout interrupt on CIK v2
Leo Liu [Wed, 18 Feb 2015 12:19:26 +0000 (13:19 +0100)]
drm/radeon: enable SRBM timeout interrupt on CIK v2

v2: disable it on suspend

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/radeon: dump full IB if we hit a packet error
Alex Deucher [Wed, 18 Feb 2015 15:15:10 +0000 (10:15 -0500)]
drm/radeon: dump full IB if we hit a packet error

Dump the whole IB if we run into an invalid packet.
This makes things much easier to debug.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=89148

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>