Using sk_stream_alloc_skb() in tcp_send_fin() is dangerous in
case a huge process is killed by OOM, and tcp_mem[2] is hit.
To be able to free memory we need to make progress, so this
patch allows FIN packets to not care about tcp_mem[2], if
skb allocation succeeded.
In a follow-up patch, we might abort tcp_send_fin() infinite loop
in case TIF_MEMDIE is set on this thread, as memory allocator
did its best getting extra memory already.
This patch reverts d22e153718 ("tcp: fix tcp fin memory accounting")
Fixes: d22e153718 ("tcp: fix tcp fin memory accounting")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
a change to allow the legacy virtio balloon.
Most excitingly, some lguest work! No seriously, I got some cleanup
patches.
Cheers,
Rusty.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Wj06
-----END PGP SIGNATURE-----
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio updates from Rusty Russell:
"Some virtio internal cleanups, a new virtio device "virtio input", and
a change to allow the legacy virtio balloon.
Most excitingly, some lguest work! No seriously, I got some cleanup
patches"
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
virtio: drop virtio_device_is_legacy_only
virtio_pci: support non-legacy balloon devices
virtio_mmio: support non-legacy balloon devices
virtio_ccw: support non-legacy balloon devices
virtio: balloon might not be a legacy device
virtio_balloon: transitional interface
virtio_ring: Update weak barriers to use dma_wmb/rmb
virtio_pci_modern: switch to type-safe io accessors
virtio_pci_modern: type-safe io accessors
lguest: handle traps on the "interrupt suppressed" iret instruction.
virtio: drop a useless config read
virtio_config: reorder functions
Add virtio-input driver.
lguest: suppress interrupts for single insn, not range.
lguest: simplify lguest_iret
lguest: rename i386_head.S in the comments
lguest: explicitly set miscdevice's private_data NULL
lguest: fix pending interrupt test.
but most architectures seem fixed now. Thanks to all involved.
Last minute rebase because I noticed a "[PATCH]" had snuck into a commit
message somehow.
Cheers,
Rusty.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=EYrW
-----END PGP SIGNATURE-----
Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module updates from Rusty Russell:
"Quentin opened a can of worms by adding extable entry checking to
modpost, but most architectures seem fixed now. Thanks to all
involved.
Last minute rebase because I noticed a "[PATCH]" had snuck into a
commit message somehow"
* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
modpost: don't emit section mismatch warnings for compiler optimizations
modpost: expand pattern matching to support substring matches
modpost: do not try to match the SHT_NUL section.
modpost: fix extable entry size calculation.
modpost: fix inverted logic in is_extable_fault_address().
modpost: handle -ffunction-sections
modpost: Whitelist .text.fixup and .exception.text
params: handle quotes properly for values not of form foo="bar".
modpost: document the use of struct section_check.
modpost: handle relocations mismatch in __ex_table.
scripts: add check_extable.sh script.
modpost: mismatch_handler: retrieve tosym information only when needed.
modpost: factorize symbol pretty print in get_pretty_name().
modpost: add handler function pointer to sectioncheck.
modpost: add .sched.text and .kprobes.text to the TEXT_SECTIONS list.
modpost: add strict white-listing when referencing sections.
module: do not print allocation-fail warning on bogus user buffer size
kernel/module.c: fix typos in message about unused symbols
HSU_DMA is selected by the HSU_DMA_PCI driver, this should be user selected
so remove the user prompt for this
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We were expecting to sit on this branch through most of the merge window since
the contents was merged into our tree late, but we ended up sitting on all of
our contents so it can go in with the rest.
The contents here is:
- A large branch of cleanups of the CM/PRM blocks on OMAP.
- A couple of patches plumbing up CM/PRM on OMAP5 and DRA7.
- A branch with DT updates for Freescale i.MX. including some shuffling from
.dts to .dtsi (include) files that causes a little churn.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=ssbK
-----END PGP SIGNATURE-----
Merge tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late changes from Olof Johansson:
"We were expecting to sit on this branch through most of the merge
window since the contents was merged into our tree late, but we ended
up sitting on all of our contents so it can go in with the rest.
The contents here is:
- a large branch of cleanups of the CM/PRM blocks on OMAP.
- a couple of patches plumbing up CM/PRM on OMAP5 and DRA7.
- a branch with DT updates for Freescale i.MX. including some
shuffling from .dts to .dtsi (include) files that causes a little
churn"
* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (78 commits)
ARM: OMAP2+: Fix booting with configs that don't have MFD_SYSCON
ARM: OMAP4+: control: add support for initializing control module via DT
ARM: dts: dra7: add minimal l4 bus layout with control module support
ARM: dts: omap5: add minimal l4 bus layout with control module support
ARM: OMAP4+: control: remove support for legacy pad read/write
ARM: OMAP4: display: convert display to use syscon for dsi muxing
ARM: dts: omap4: add minimal l4 bus layout with control module support
ARM: dts: am4372: add minimal l4 bus layout with control module support
ARM: dts: am43xx-epos-evm: fix pinmux node layout
ARM: dts: am33xx: add minimal l4 bus layout with control module support
ARM: dts: omap3: add minimal l4 bus layout with control module support
ARM: dts: omap24xx: add minimal l4 bus layout with control module support
ARM: OMAP2+: control: add syscon support for register accesses
ARM: OMAP2+: id: cache omap_type value
ARM: OMAP2+: control: remove API for getting control module base address
ARM: OMAP2+: clock: add low-level support for regmap
ARM: OMAP4+: PRM: get rid of cpu_is_omap44xx calls from interrupt init
ARM: OMAP4+: PRM: setup prm_features from the PRM init time flags
ARM: OMAP2+: CM: move SoC specific init calls within a generic API
ARM: OMAP4+: PRM: determine prm_device_inst based on DT compatibility
...
We keep collecting defconfig updates in a separate branch mostly to encourage
people to handle them separately and avoid conflicts between different topics.
Most of these are enablement of new drivers that have come in, or minor config
refreshes due to reorderings in Kconfig files, etc. I.e. mostly minor churn
of various kinds.
We might start folding this branch into something else for upstream merge
since it's so small, but keep it independent in our own tree for the above
reasons.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=W1j4
-----END PGP SIGNATURE-----
Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC defconfig updates from Olof Johansson:
"We keep collecting defconfig updates in a separate branch mostly to
encourage people to handle them separately and avoid conflicts between
different topics.
Most of these are enablement of new drivers that have come in, or
minor config refreshes due to reorderings in Kconfig files, etc. I.e.
mostly minor churn of various kinds.
We might start folding this branch into something else for upstream
merge since it's so small, but keep it independent in our own tree for
the above reasons"
* tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits)
ARM: multi_v7_defconfig: enable alpine platform
ARM: multi_v7_defconfig: Add gpio-restart driver
ARM: multi_v7_defconfig: Build the Marvell WiFi-Ex driver as a module
ARM: multi_v7_defconfig: Enable support for ELAN i2c trackpads
ARM: multi_v7_defconfig: Enable Tegra ACTMON support
ARM: configs: remove all CONFIG_RCAR_AUDMAC_PP from ARM defconfigs
ARM: configs: enable Marvell Armada 39x in multi_v7_defconfig
ARM: exynos_defconfig: Enable HDMI support
ARM: exynos_defconfig: Enable options to mount a rootfs via NFS
ARM: qcom: Increase MMC_BLOCK_MINORS in defconfig
ARM: mvebu: Enable perf support in mvebu_v7_defconfig
ARM: exynos_defconfig: Enable ChromeOS EC chardev driver
ARM: exynos_defconfig: Enable CPU idle
ARM: exynos_defconfig: Enable Marvell WiFi-Ex support
arm: qcom: Update defconfig
arm: qcom: Enable lpass clock driver in defconfig
ARM: omap2plus_defconfig: Enable n900 modem as loadable modules
ARM: omap2plus_defconfig: Update bluetooth options
ARM: omap2plus_defconfig: Enable leds-pwm
ARM: omap1_defconfig: drop obsolete Kconfig symbols
...
The changes here belong to two main platforms:
- Atmel At91 is flipping the bit and going multiplatform. This includes some
cleanups and removal of code, and the final flip of config dependencies
- Shmobile has several platforms that are going multiplatform, but this
branch also contains a bunch of cleanups that they weren't able to keep
separate in a good way. THere's also a removal of one of their SoCs and the
corresponding boards (sh7372 and mackerel).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Vq4N
-----END PGP SIGNATURE-----
Merge tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC multiplatform code changes from Olof Johansson:
"The changes here belong to two main platforms:
- Atmel At91 is flipping the bit and going multiplatform. This
includes some cleanups and removal of code, and the final flip of
config dependencies
- Shmobile has several platforms that are going multiplatform, but
this branch also contains a bunch of cleanups that they weren't
able to keep separate in a good way. THere's also a removal of one
of their SoCs and the corresponding boards (sh7372 and mackerel)"
* tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits)
ARM: at91/pm: move AT91_MEMCTRL_* to pm.h
ARM: at91/pm: move the standby functions to pm.c
ARM: at91: fix pm_suspend.S compilation when ARMv6 is selected
ARM: at91: add a Kconfig dependency on multi-platform
ARM: at91: drop AT91_TIMER_HZ
ARM: at91: remove hardware.h
ARM: at91: remove SoC headers
ARM: at91: remove useless mach/cpu.h
ARM: at91: remove unused headers
ARM: at91: switch at91_dt_defconfig to multiplatform
ARM: at91: switch to multiplatform
ARM: shmobile: r8a7778: enable multiplatform target
ARM: shmobile: bockw: add sound to DT
ARM: shmobile: r8a7778: add sound to DT
ARM: shmobile: bockw: add devices hooked up to i2c0 to DT
DT: i2c: add trivial binding for OKI ML86V7667 video decoder
ARM: shmobile: r8a7778: common clock framework CPG driver
ARM: shmobile: bockw dts: set extal clock frequency
ARM: shmobile: bockw dts: Move Ethernet node to BSC
ARM: shmobile: r8a73a4: Remove legacy code
...
Driver updates for v4.1. Some of these are for drivers/soc, where we find more
and more SoC-specific drivers these days. Some are for other driver subsystems
where we have received acks from the appropriate maintainers.
The larger parts of this branch are:
- MediaTek support for their PMIC wrapper interface, a high-level interface
for talking to the system PMIC over a dedicated I2C interface.
- Qualcomm SCM driver has been moved to drivers/firmware. It's used for CPU
up/down and needs to be in a shared location for arm/arm64 common code.
- Cleanup of ARM-CCI PMU code.
- Anoter set of cleanusp to the OMAP GPMC code.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=/sWo
-----END PGP SIGNATURE-----
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
"Driver updates for v4.1. Some of these are for drivers/soc, where we
find more and more SoC-specific drivers these days. Some are for
other driver subsystems where we have received acks from the
appropriate maintainers.
The larger parts of this branch are:
- MediaTek support for their PMIC wrapper interface, a high-level
interface for talking to the system PMIC over a dedicated I2C
interface.
- Qualcomm SCM driver has been moved to drivers/firmware. It's used
for CPU up/down and needs to be in a shared location for arm/arm64
common code.
- cleanup of ARM-CCI PMU code.
- another set of cleanusp to the OMAP GPMC code"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
soc/mediatek: Remove unused variables
clocksource: atmel-st: select MFD_SYSCON
soc: mediatek: Add PMIC wrapper for MT8135 and MT8173 SoCs
arm-cci: Fix CCI PMU event validation
arm-cci: Split the code for PMU vs driver support
arm-cci: Get rid of secure transactions for PMU driver
arm-cci: Abstract the CCI400 PMU specific definitions
arm-cci: Rearrange code for splitting PMU vs driver code
drivers: cci: reject groups spanning multiple HW PMUs
ARM: at91: remove useless include
clocksource: atmel-st: remove mach/hardware dependency
clocksource: atmel-st: use syscon/regmap
ARM: at91: time: move the system timer driver to drivers/clocksource
ARM: at91: properly initialize timer
ARM: at91: at91rm9200: remove deprecated arm_pm_restart
watchdog: at91rm9200: implement restart handler
watchdog: at91rm9200: use the system timer syscon
mfd: syscon: Add atmel system timer registers definition
ARM: at91/dt: declare atmel,at91rm9200-st as a syscon
soc: qcom: gsbi: Add support for ADM CRCI muxing
...
As always, this tends to be one of our bigger branches. There are lots of
updates this release, but not that many jumps out as something that needs
more detailed coverage. Some of the highlights are:
- DTs for the new Annapurna Labs Alpine platform
- More graphics DT pieces falling into place on Exynos, bridges, clocks.
- Plenty of DT updates for Qualcomm platforms for various IP blocks
- Some churn on Tegra due to switch-over to tool-generated pinctrl data
- Misc fixes and updates for Atmel at91 platforms
- Various DT updates to add IP block support on Broadcom's Cygnus platforms
- More updates for Renesas platforms as DT support is added for various IP
blocks (IPMMU, display, audio, etc).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=wqhB
-----END PGP SIGNATURE-----
Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM DT updates from Olof Johansson:
"As always, this tends to be one of our bigger branches. There are
lots of updates this release, but not that many jumps out as something
that needs more detailed coverage. Some of the highlights are:
- DTs for the new Annapurna Labs Alpine platform
- more graphics DT pieces falling into place on Exynos, bridges,
clocks.
- plenty of DT updates for Qualcomm platforms for various IP blocks
- some churn on Tegra due to switch-over to tool-generated pinctrl
data
- misc fixes and updates for Atmel at91 platforms
- various DT updates to add IP block support on Broadcom's Cygnus
platforms
- more updates for Renesas platforms as DT support is added for
various IP blocks (IPMMU, display, audio, etc)"
* tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (231 commits)
ARM: dts: alpine: add internal pci
Revert "ARM: dts: mt8135: Add pinctrl/GPIO/EINT node for mt8135."
ARM: mvebu: use 0xf1000000 as internal registers on Armada 370 DB
ARM: dts: qcom: Add idle state device nodes for 8064
ARM: dts: qcom: Add idle states device nodes for 8084
ARM: dts: qcom: Add idle states device nodes for 8974/8074
ARM: dts: qcom: Update power-controller device node for 8064 Krait CPUs
ARM: dts: qcom: Add power-controller device node for 8084 Krait CPUs
ARM: dts: qcom: Add power-controller device node for 8074 Krait CPUs
devicetree: bindings: Document qcom,idle-states
devicetree: bindings: Update qcom,saw2 node bindings
dt-bindings: Add #defines for MSM8916 clocks and resets
arm: dts: qcom: Add LPASS Audio HW to IPQ8064 device tree
arm: dts: qcom: Add APQ8084 chipset SPMI PMIC's nodes
arm: dts: qcom: Add 8x74 chipset SPMI PMIC's nodes
arm: dts: qcom: Add SPMI PMIC Arbiter nodes for APQ8084 and MSM8974
arm: dts: qcom: Add LCC nodes
arm: dts: qcom: Add TCSR support for MSM8960
arm: dts: qcom: Add TCSR support for MSM8660
arm: dts: qcom: Add TCSR support for IPQ8064
...
Our SoC branch usually contains expanded support for new SoCs and other core
platform code. In this case, that includes:
- Support for the new Annapurna Labs "Alpine" platform
- A rework greatly simplifying adding new platform support to the MCPM
subsystem (Multi-cluster power management)
- Cpuidle and PM improvements for Exynos3250
- Misc updates for Renesas, OMAP, Meson, i.MX. Some of these could have
gone in other branches but ended up here for various reasons.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=tcGs
-----END PGP SIGNATURE-----
Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform updates from Olof Johansson:
"Our SoC branch usually contains expanded support for new SoCs and
other core platform code. In this case, that includes:
- support for the new Annapurna Labs "Alpine" platform
- a rework greatly simplifying adding new platform support to the
MCPM subsystem (Multi-cluster power management)
- cpuidle and PM improvements for Exynos3250
- misc updates for Renesas, OMAP, Meson, i.MX. Some of these could
have gone in other branches but ended up here for various reasons"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (53 commits)
ARM: alpine: add support for generic pci
ARM: Exynos: migrate DCSCB to the new MCPM backend abstraction
ARM: vexpress: migrate DCSCB to the new MCPM backend abstraction
ARM: vexpress: DCSCB: tighten CPU validity assertion
ARM: vexpress: migrate TC2 to the new MCPM backend abstraction
ARM: MCPM: move the algorithmic complexity to the core code
ARM: EXYNOS: allow cpuidle driver usage on Exynos3250 SoC
ARM: EXYNOS: add AFTR mode support for Exynos3250
ARM: EXYNOS: add code for setting/clearing boot flag
ARM: EXYNOS: fix CPU1 hotplug on Exynos3250
ARM: S3C64XX: Use fixed IRQ bases to avoid conflicts on Cragganmore
ARM: cygnus: fix const declaration bcm_cygnus_dt_compat
ARM: DRA7: hwmod: Fix the hwmod class for GPTimer4
ARM: DRA7: hwmod: Add data for GPTimers 13 through 16
ARM: EXYNOS: Remove left over 'extra_save'
ARM: EXYNOS: Constify exynos_pm_data array
ARM: EXYNOS: use static in suspend.c
ARM: EXYNOS: Use platform device name as power domain name
ARM: EXYNOS: add support for async-bridge clocks for pm_domains
ARM: omap-device: add missed callback for suspend-to-disk
...
We've got a fairly large cleanup branch this time. The bulk of this is removal
of non-DT platforms of several flavors:
- Atmel at91 platforms go full-DT, with removal of remaining board-file based
support
- OMAP removes legacy board files for three more platforms
- Removal of non-DT mach-msm, newer Qualcomm platforms now live in mach-qcom
- Freescale i.MX25 also removes non-DT platform support
Most of the rest of the changes here are fallout from the above, i.e. for
example removal of drivers that now lack platforms, etc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=BV8A
-----END PGP SIGNATURE-----
Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"We've got a fairly large cleanup branch this time. The bulk of this
is removal of non-DT platforms of several flavors:
- Atmel at91 platforms go full-DT, with removal of remaining
board-file based support
- OMAP removes legacy board files for three more platforms
- removal of non-DT mach-msm, newer Qualcomm platforms now live in
mach-qcom
- Freescale i.MX25 also removes non-DT platform support"
Most of the rest of the changes here are fallout from the above, i.e. for
example removal of drivers that now lack platforms, etc.
* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (58 commits)
mmc: Remove msm_sdcc driver
gpio: Remove gpio-msm-v1 driver
ARM: Remove mach-msm and associated ARM architecture code
ARM: shmobile: cpuidle: Remove the pointless default driver
ARM: davinci: dm646x: Add interrupt resource for McASPs
ARM: davinci: irqs: Correct McASP1 TX interrupt definition for DM646x
ARM: davinci: dm646x: Clean up the McASP DMA resources
ARM: davinci: devices-da8xx: Add support for McASP2 on da830
ARM: davinci: devices-da8xx: Clean up and correct the McASP device creation
ARM: davinci: devices-da8xx: Add interrupt resource to McASP structs
ARM: davinci: devices-da8xx: Add resource name for the McASP DMA request
ARM: OMAP2+: Remove legacy support for omap3 TouchBook
ARM: OMAP3: Remove legacy support for devkit8000
ARM: OMAP3: Remove legacy support for EMA-Tech Stalker board
ARM: shmobile: Consolidate the pm code for R-Car Gen2
ARM: shmobile: r8a7791: Correct SYSCIER value
ARM: shmobile: r8a7790: Correct SYSCIER value
ARM: at91: remove old setup
ARM: at91: sama5d4: remove useless map_io
ARM: at91: sama5 use SoC detection infrastructure
...
Here's the usual "low-priority fixes that didn't make it into the last
few -rcs, with a twist: We had a fixes pull request that I didn't send
in time to get into 4.0, so we'll send some of them to Greg for -stable as
well.
Contents here is as usual not all that controversial:
- A handful of randconfig fixes from Arnd, in particular for older Samsung
platforms
- Exynos fixes, !SMP building, DTS updates for MMC and lid switch
- Kbuild fix to create output subdirectory for DTB files
- Misc minor fixes for OMAP
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=o/4N
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Here's the usual "low-priority fixes that didn't make it into the last
few -rcs, with a twist: We had a fixes pull request that I didn't send
in time to get into 4.0, so we'll send some of them to Greg for
-stable as well.
Contents here is as usual not all that controversial:
- a handful of randconfig fixes from Arnd, in particular for older
Samsung platforms
- Exynos fixes, !SMP building, DTS updates for MMC and lid switch
- Kbuild fix to create output subdirectory for DTB files
- misc minor fixes for OMAP"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits)
ARM: at91/dt: sama5d3 xplained: add phy address for macb1
kbuild: Create directory for target DTB
ARM: mvebu: Disable CPU Idle on Armada 38x
ARM: DRA7: Enable Cortex A15 errata 798181
ARM: dts: am57xx-beagle-x15: Add thermal map to include fan and tmp102
ARM: dts: DRA7: Add bandgap and related thermal nodes
bus: ocp2scp: SYNC2 value should be changed to 0x6
ARM: dts: am4372: Add "ti,am437x-ocp2scp" as compatible string for OCP2SCP
ARM: OMAP2+: remove superfluous NULL pointer check
ARM: EXYNOS: Fix build breakage cpuidle on !SMP
ARM: dts: fix lid and power pin-functions for exynos5250-spring
ARM: dts: fix mmc node updates for exynos5250-spring
ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688
MAINTAINERS: add OMAP defconfigs under OMAP SUPPORT
ARM: OMAP1: PM: fix some build warnings on 1510-only Kconfigs
ARM: cns3xxx: don't export static symbol
ARM: S3C24XX: avoid a Kconfig warning
ARM: S3C24XX: fix header file inclusions
ARM: S3C24XX: fix building without PM_SLEEP
ARM: S3C24XX: use SAMSUNG_WAKEMASK for s3c2416
...
This is an improved straw bucket that correctly avoids any data movement
between items A and B when neither A nor B's weights are changed. Said
differently, if we adjust the weight of item C (including adding it anew
or removing it completely), we will only see inputs move to or from C,
never between other items in the bucket.
Notably, there is not intermediate scaling factor that needs to be
calculated. The mapping function is a simple function of the item weights.
The below commits were squashed together into this one (mostly to avoid
adding and then yanking a ~6000 lines worth of crush_ln_table):
- crush: add a straw2 bucket type
- crush: add crush_ln to calculate nature log efficently
- crush: improve straw2 adjustment slightly
- crush: change crush_ln to provide 32 more digits
- crush: fix crush_get_bucket_item_weight and bucket destroy for straw2
- crush/mapper: fix divide-by-0 in straw2
(with div64_s64() for draw = ln / w and INT64_MIN -> S64_MIN - need
to create a proper compat.h in ceph.git)
Reflects ceph.git commits 242293c908e923d474910f2b8203fa3b41eb5a53,
32a1ead92efcd351822d22a5fc37d159c65c1338,
6289912418c4a3597a11778bcf29ed5415117ad9,
35fcb04e2945717cf5cfe150b9fa89cb3d2303a1,
6445d9ee7290938de1e4ee9563912a6ab6d8ee5f,
b5921d55d16796e12d66ad2c4add7305f9ce2353.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Crush temporary buffers are allocated as per replica size configured
by the user. When there are more final osds (to be selected as per
rule) than the replicas, buffer overlaps and it causes crash. Now, it
ensures that at most num-rep osds are selected even if more number of
osds are allowed by the rule.
Reflects ceph.git commits 6b4d1aa99718e3b367496326c1e64551330fabc0,
234b066ba04976783d15ff2abc3e81b6cc06fb10.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Thomas stumbled over the hrtimer_forward_now() in
perf_event_mux_interval_ms_store() and noticed its broken-ness.
You cannot just change the expiry time of an active timer, it will
destroy the red-black tree order and cause havoc.
Change it to (re)start the timer instead, (re)starting a timer will
dequeue and enqueue a timer and therefore preserve rb-tree order.
Since we cannot enqueue remotely, wrap the thing in
cpu_function_call(), this however mandates that we restrict ourselves
to online cpus. Also serialize the entire setting so we don't get
multiple concurrent threads trying to update to different values.
Also fix a problem in perf_mux_hrtimer_restart(), checking against
hrtimer_active() can actually loose us the timer when timer->state ==
HRTIMER_STATE_CALLBACK and the callback has already decided NORESTART.
Furthermore it doesn't make any sense to test
hrtimer_callback_running() when we already tested hrtimer_active(),
but with the above change, we explicitly must call it when
callback_running.
Lastly, rename a few functions:
s/perf_cpu_hrtimer_/perf_mux_hrtimer_/ -- because I could not find
the mux timer function
s/\<hr\>/timer/ -- because that's the normal way of calling things.
Fixes: 62b8563979 ("perf: Add sysfs entry to adjust multiplexing interval per PMU")
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150415095011.863052571@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Rather small this time:
- a fix for a nasty bug with virtual IRQ injection
- a fix for irqfd
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Cfx3
-----END PGP SIGNATURE-----
Merge tag 'kvm-arm-for-4.1-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/ARM changes for v4.1, take #2:
Rather small this time:
- a fix for a nasty bug with virtual IRQ injection
- a fix for irqfd
Roman reported a 3 cpu lockup scenario involving __start_cfs_bandwidth().
The more I look at that code the more I'm convinced its crack, that
entire __start_cfs_bandwidth() thing is brain melting, we don't need to
cancel a timer before starting it, *hrtimer_start*() will happily remove
the timer for you if its still enqueued.
Removing that, removes a big part of the problem, no more ugly cancel
loop to get stuck in.
So now, if I understand things right, the entire reason you have this
cfs_b->lock guarded ->timer_active nonsense is to make sure we don't
accidentally lose the timer.
It appears to me that it should be possible to guarantee that same by
unconditionally (re)starting the timer when !queued. Because regardless
what hrtimer::function will return, if we beat it to (re)enqueue the
timer, it doesn't matter.
Now, because hrtimers don't come with any serialization guarantees we
must ensure both handler and (re)start loop serialize their access to
the hrtimer to avoid both trying to forward the timer at the same
time.
Update the rt bandwidth timer to match.
This effectively reverts: 09dc4ab039 ("sched/fair: Fix
tg_set_cfs_bandwidth() deadlock on rq->lock").
Reported-by: Roman Gushchin <klamm@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/20150415095011.804589208@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Because we drop cpu_base->lock around calling hrtimer::function, it is
possible for hrtimer_start() to come in between and enqueue the timer.
If hrtimer::function then returns HRTIMER_RESTART we'll hit the BUG_ON
because HRTIMER_STATE_ENQUEUED will be set.
Since the above is a perfectly valid scenario, remove the BUG_ON and
make the enqueue_hrtimer() call conditional on the timer not being
enqueued already.
NOTE: in that concurrent scenario its entirely common for both sites
to want to modify the hrtimer, since hrtimers don't provide
serialization themselves be sure to provide some such that the
hrtimer::function and the hrtimer_start() caller don't both try and
fudge the expiration state at the same time.
To that effect, add a WARN when someone tries to forward an already
enqueued timer, the most common way to change the expiry of self
restarting timers. Ideally we'd put the WARN in everything modifying
the expiry but most of that is inlines and we don't need the bloat.
Fixes: 2d44ae4d71 ("hrtimer: clean up cpu->base locking tricks")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/20150415113105.GT5029@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
do_usleep_range() and schedule_hrtimeout_range() are __sched as
well. So it makes no sense to have the exported function in a
different section.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.833709502@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The only user ignores it anyway and rightfully so.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.756060258@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
We can do a lockless check for hrtimer_active before actually taking
the lock in hrtimer[_try_to]_cancel. This is useful for hotpath users
like nanosleep as they avoid the lock dance when the timer has
expired.
This is safe because active is true when the timer is enqueued or the
callback is running. Taking the hrtimer base lock does not protect
against concurrent hrtimer_start calls, the callsite has to do the
proper serialization itself.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.580273114@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
No user was ever interested whether the timer was active or not when
it was started. All abusers of the return value are gone, so get rid
of it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.483556394@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The assignment of bc_moved in the conditional construct relies on the
fact that in the case of hrtimer_start() invocation the return value
is always 0. It took me a while to understand it.
We want to get rid of the hrtimer_start() return value. Open code the
logic which makes it readable as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.404751457@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
We want to get rid of the hrtimer_start() return value and the alarm
timer return value is nowhere used. Remove it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20150414203503.243910615@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The check for hrtimer_active() after starting the timer is
pointless. If the timer is inactive it has expired already and
therefor the task pointer is already NULL.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Link: http://lkml.kernel.org/r/20150414203503.165258315@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The check for hrtimer_active() after starting the timer is
pointless. If the timer is inactive it has expired already and
therefor the task pointer is already NULL.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203503.081830481@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The check for hrtimer_active() after starting the timer is
pointless. If the timer is inactive it has expired already and
therefor the task pointer is already NULL.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.985825453@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The check for hrtimer_active() after starting the timer is
pointless. If the timer is inactive it has expired already and
therefor the task pointer is already NULL.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.907149271@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
No point for an extra export just to set the extra argument of
hrtimer_start_range_ns() to 0.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.808544539@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() does not longer defer already expired timers to the
softirq. Get rid of the __hrtimer_start_range_ns() invocation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.627353666@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() now enforces a timer interrupt when an already expired
timer is enqueued.
Get rid of the __hrtimer_start_range_ns() invocations and the loops
around it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.531131739@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() does not longer defer already expired timers to the
softirq. Get rid of the __hrtimer_start_range_ns() invocation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203502.452104213@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() does not longer defer already expired timers to the
softirq. Get rid of the __hrtimer_start_range_ns() invocation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20150414203502.360555157@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() does not longer defer already expired timers to the
softirq. Get rid of the __hrtimer_start_range_ns() invocation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20150414203502.260487331@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The evaluation of the next timer in the nohz code is based on jiffies
while all the tick internals are nano seconds based. We have also to
convert hrtimer nanoseconds to jiffies in the !highres case. That's
just wrong and introduces interesting corner cases.
Turn it around and convert the next timer wheel timer expiry and the
rcu event to clock monotonic and base all calculations on
nanoseconds. That identifies the case where no timer is pending
clearly with an absolute expiry value of KTIME_MAX.
Makes the code more readable and gets rid of the jiffies magic in the
nohz code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Link: http://lkml.kernel.org/r/20150414203502.184198593@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Get rid of one indentation level. Preparatory patch for a major
rework. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Link: http://lkml.kernel.org/r/20150414203502.101563235@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
We already got rid of the hrtimer reprogramming loops and hoops as
hrtimer now enforces an interrupt if the enqueued time is in the past.
Do the same for the nohz non highres mode. That gets rid of the need
to raise the softirq which only serves the purpose of getting the
machine out of the inner idle loop.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Link: http://lkml.kernel.org/r/20150414203502.023464878@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer_start() enforces a timer interrupt if the timer is already
expired. Get rid of the checks and the forward loop.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Link: http://lkml.kernel.org/r/20150414203501.943658239@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hrtimer softirq is a leftover from the initial implementation and
serves only the purpose to handle the enqueueing of already expired
timers in the high resolution timer mode. We discussed whether we
change the return value and force all start sites to handle that the
timer is already expired, but that would be a Herculean task and I'm
not sure whether its a good idea to enforce that handling on
everyone.
A simpler solution is to enforce a timer interrupt instead of raising
and scheduling a softirq. Just use the existing infrastructure to do
so and remove all the softirq leftovers.
The HRTIMER softirq enum is now unused, but kept around because trace
parsers rely on the existing numbering.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203501.840834708@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
