Jason Gerecke [Wed, 1 Jul 2015 20:01:00 +0000 (13:01 -0700)]
HID: wacom: Enable pad device for older Bamboo Touch tablets
Commit 862cf55 ("HID: wacom: Introduce a new WACOM_DEVICETYPE_PAD device_type")
neglected to set the WACOM_DEVICETYPE_PAD flag for older two-finger Bamboo
Touch tablets. Not only does this result in the pad device not appearing when
such a tablet is plugged in, but also causes a segfault when 'wacom_bpt_touch'
tries to send pad events. This patch adds the flag to resolve these issues.
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
Brent Adam [Fri, 19 Jun 2015 16:53:35 +0000 (10:53 -0600)]
HID: multitouch: Fix fields from pen report ID being interpreted for multitouch
Fields like HID_DG_CONTACTCOUNT are outside of the physical collection,
but within the application collection and report ID. Make sure to catch
those fields that are not part of the mt_report_id and return 0 so they
can be processed with the pen. Otherwise, the wrong HID_DG_CONTACTCOUNT
will be applied to cc_index and result in dereferencing a null pointer in
mt_touch_report.
Signed-off-by: Brent Adam <brentadam@smarttech.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
Reyad Attiyat [Mon, 29 Jun 2015 00:22:37 +0000 (19:22 -0500)]
HID: microsoft: Add quirk for MS Surface Type/Touch cover
The newer firmware on MS Surface 2 tablets causes the type and touch cover keyboards to timeout when waiting for reports.
The quirk HID_QUIRK_NO_INIT_REPORTS allows them to function normally.
Linus Torvalds [Tue, 23 Jun 2015 21:05:52 +0000 (14:05 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID updates from Jiri Kosina:
- spurious power/wakeup sysfs files removal for I2C-HID devices, from
Andrew Duggan
- Logitech M560 support, from Goffredo Baroncelli
- a lot of housekeeping cleanups to hid-lg4ff driver, from Michal Maly
- improved support for Plantronics devices, from Terry Junge
- Sony Motion Controller and Navigation Controller support and
subsequent cleanups of hid-sony driver, from Frank Praznik and Simon
Wood
- HW support improvements to the Wacom driver, from Jason Gerecke and
Ping Cheng
- assorted small cleanups and device ID additions all over the place
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (69 commits)
HID: cypress: use swap() in cp_report_fixup()
HID: microsoft: Add Surface Power Cover
HID: hid-sony: Fix report descriptor for Navigation Controller
HID: hid-sony: Navigation controller only has 1 LED and no rumble
HID: hid-sony: Add BT support for Navigation Controller
HID: wacom: Introduce new 'touch_input' device
HID: wacom: Split apart 'wacom_setup_pentouch_input_capabilites'
HID: wacom: Introduce a new WACOM_DEVICETYPE_PAD device_type
HID: wacom: Treat features->device_type values as flags
HID: wacom: Simplify 'wacom_update_name'
HID: rmi: Disable populating F30 when the touchpad has physical buttons
HID: plantronics: Update to map volume up/down controls
HID: sony: PS Move fix report descriptor
HID: sony: PS3 Move enable LEDs and Rumble via BT
HID: sony: Add support PS3 Move Battery via BT
HID: sony: Add quirk for MOTION_CONTROLLER_BT
HID: sony: Support PS3 Move Controller when connected via Bluetooth
HID: i2c-hid: Do not set the ACPI companion field in the HID device
usb, HID: Remove Vernier devices from lsusb and hid_ignore_list
HID: hidpp: Add driver for mouse logitech M560
...
Pull PCMCIA update from Dominik Brodowski:
"A few PCMCIA fixes and cleanups are available in the PCMCIA tree.
Most of them are trivial and self-explanatory. Of particular note are
the last three patches which add an important hardware quirk for
Toshiba ToPIC95 sockets (or BIOS breakage on systems with these
sockets), fix resource leaks in yenta_socket enable/disable call
paths, and fix a regression caused by patch 1c6c9b1d9d25 since v4.0.
Alan stated he is OK with me pushing this patch upstream. Once it
works out well in your tree, I will push it to stable for 4.0/4.1 as
well"
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia:
pcmcia: do not break rsrc_nonstatic when handling anonymous cards
pcmcia: Fix resource leaks in yenta_probe() and _close()
Disable write buffering on Toshiba ToPIC95
pcmcia: Convert dev_printk to dev_<level>
pcmcia/vrc4171: Remove typedefs for enums and struct
pcmcia: Remove typedef in structs and emum
pcmcia: Remove typedef tuple_flags
drivers: pcmcia: electra_cf.c fix checkpatch error and warnings
drivers: pcmcia: ds.c fix checkpatch errors
PCMCIA: Remove commented references to dead class_device_create_file()
drivers/pcmcia/electra_cf.c: add missing iounmap and kfree
pcmcia: replace open-coded ARRAY_SIZE with macro
Linus Torvalds [Tue, 23 Jun 2015 20:41:24 +0000 (13:41 -0700)]
Merge tag 'pci-v4.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"PCI changes for the v4.2 merge window:
Enumeration
- Move pci_ari_enabled() to global header (Alex Williamson)
- Account for ARI in _PRT lookups (Alex Williamson)
- Remove unused pci_scan_bus_parented() (Yijing Wang)
Resource management
- Use host bridge _CRS info on systems with >32 bit addressing (Bjorn Helgaas)
- Use host bridge _CRS info on Foxconn K8M890-8237A (Bjorn Helgaas)
- Fix pci_address_to_pio() conversion of CPU address to I/O port (Zhichang Yuan)
- Add pci_bus_addr_t (Yinghai Lu)
PCI device hotplug
- Wait for pciehp command completion where necessary (Alex Williamson)
- Drop pointless ACPI-based "slot detection" check (Rafael J. Wysocki)
- Check ignore_hotplug for all downstream devices (Rafael J. Wysocki)
- Propagate the "ignore hotplug" setting to parent (Rafael J. Wysocki)
- Inline pciehp "handle event" functions into the ISR (Bjorn Helgaas)
- Clean up pciehp debug logging (Bjorn Helgaas)
Power management
- Remove redundant PCIe port type checking (Yijing Wang)
- Add dev->has_secondary_link to track downstream PCIe links (Yijing Wang)
- Use dev->has_secondary_link to find downstream links for ASPM (Yijing Wang)
- Drop __pci_disable_link_state() useless "force" parameter (Bjorn Helgaas)
- Simplify Clock Power Management setting (Bjorn Helgaas)
Virtualization
- Add ACS quirks for Intel 9-series PCH root ports (Alex Williamson)
- Add function 1 DMA alias quirk for Marvell 9120 (Sakari Ailus)
MSI
- Disable MSI at enumeration even if kernel doesn't support MSI (Michael S. Tsirkin)
- Remove unused pci_msi_off() (Bjorn Helgaas)
- Rename msi_set_enable(), msix_clear_and_set_ctrl() (Michael S. Tsirkin)
- Export pci_msi_set_enable(), pci_msix_clear_and_set_ctrl() (Michael S. Tsirkin)
- Drop pci_msi_off() calls during probe (Michael S. Tsirkin)
APM X-Gene host bridge driver
- Add APM X-Gene v1 PCIe MSI/MSIX termination driver (Duc Dang)
- Add APM X-Gene PCIe MSI DTS nodes (Duc Dang)
- Disable Configuration Request Retry Status for v1 silicon (Duc Dang)
- Allow config access to Root Port even when link is down (Duc Dang)
Broadcom iProc host bridge driver
- Allow override of device tree IRQ mapping function (Hauke Mehrtens)
- Add BCMA PCIe driver (Hauke Mehrtens)
- Directly add PCI resources (Hauke Mehrtens)
- Free resource list after registration (Hauke Mehrtens)
Synopsys DesignWare host bridge driver
- Consolidate outbound iATU programming functions (Jisheng Zhang)
- Use iATU0 for cfg and IO, iATU1 for MEM (Jisheng Zhang)
- Add support for x8 links (Zhou Wang)
- Wait for link to come up with consistent style (Bjorn Helgaas)
- Use pci_scan_root_bus() for simplicity (Yijing Wang)
TI DRA7xx host bridge driver
- Use dw_pcie_link_up() consistently (Bjorn Helgaas)
Miscellaneous
- Include <linux/pci.h>, not <asm/pci.h> (Bjorn Helgaas)
- Remove unnecessary #includes of <asm/pci.h> (Bjorn Helgaas)
- Remove unused pcibios_select_root() (again) (Bjorn Helgaas)
- Remove unused pci_dma_burst_advice() (Bjorn Helgaas)
- xen/pcifront: Don't use deprecated function pci_scan_bus_parented() (Arnd Bergmann)"
* tag 'pci-v4.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (58 commits)
PCI: pciehp: Inline the "handle event" functions into the ISR
PCI: pciehp: Rename queue_interrupt_event() to pciehp_queue_interrupt_event()
PCI: pciehp: Make queue_interrupt_event() void
PCI: xgene: Allow config access to Root Port even when link is down
PCI: xgene: Disable Configuration Request Retry Status for v1 silicon
PCI: pciehp: Clean up debug logging
x86/PCI: Use host bridge _CRS info on systems with >32 bit addressing
PCI: imx6: Add #define PCIE_RC_LCSR
PCI: imx6: Use "u32", not "uint32_t"
PCI: Remove unused pci_scan_bus_parented()
xen/pcifront: Don't use deprecated function pci_scan_bus_parented()
PCI: imx6: Add speed change timeout message
PCI/ASPM: Simplify Clock Power Management setting
PCI: designware: Wait for link to come up with consistent style
PCI: layerscape: Factor out ls_pcie_establish_link()
PCI: layerscape: Use dw_pcie_link_up() consistently
PCI: dra7xx: Use dw_pcie_link_up() consistently
x86/PCI: Use host bridge _CRS info on Foxconn K8M890-8237A
PCI: pciehp: Wait for hotplug command completion where necessary
PCI: Remove unused pci_dma_burst_advice()
...
Linus Torvalds [Tue, 23 Jun 2015 20:39:56 +0000 (13:39 -0700)]
Merge tag 'hwmon-for-linus-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
- new driver for Microchip TC74
- support for ncpXXwf104 added to ntc_thermistor driver
- minor cleanup
* tag 'hwmon-for-linus-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: add driver for Microchip TC74
hwmon: (ntc_thermistor) Improve precision of resistance calculation
hwmon: (ntc_thermistor) fix iio raw to microvolts conversion
hwmon: (atxp1) Drop auto-detection
hwmon: (atxp1) Drop FSF mailing address
hwmon: Allow compile test of GPIO consumers if !GPIOLIB
hwmon: (sht15) Constify platform_device_id
hwmon: (max197) Constify platform_device_id
hwmon: (ntc_thermistor) Add support for ncpXXwf104
Linus Torvalds [Tue, 23 Jun 2015 20:38:04 +0000 (13:38 -0700)]
Merge tag 'mmc-v4.2' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson:
"Here are the changes for MMC for v4.2.
MMC core:
- Fix an error path in the mmc block layer
- Fix PM domain attachment for the SDIO bus
- Add support for driver strength selection
- Increase a delay to let voltage stabilize
- Add support for disabling write-protect detection
- Add facility to support re-tuning
- Re-tune and retry in the recovery path
- Add reset option for SDIO
- Consolidations and clean-ups
MMC host:
- Add Mediatek MMC driver
- Constify platform_device_id for a couple of hosts
- Fix modalias to make module auto-loading work for a couple of hosts
- sdhci: Add support for sdhci-arasan4.9a
- sdhci: Fix low memory corruption
- sdhci: Restore behavior while creating OCR mask
- sdhci: Add a callback to select drive strength
- sdhci: Fix driver type B and D handling
- sdhci: Add support for drive strength selection for SPT
- sdhci: Enable HS400 for some Intel host controllers
- sdhci: Convert to use the new re-tuning facility
- sdhci: Various minor fixes and clean-ups
- dw_mmc: Add support for hi6220
- dw_mmc: Use core to handle absent write protect line
- dw_mmc: Add support to switch voltage
- tmio: Some fixes and modernizations
- sh_mmcif: Improve clock rate calculation"
* tag 'mmc-v4.2' of git://git.linaro.org/people/ulf.hansson/mmc: (98 commits)
mmc: queue: prevent soft lockups on PREEMPT=n
mmc: mediatek: Add PM support for MMC driver
mmc: mediatek: Add Mediatek MMC driver
mmc: dt-bindings: add Mediatek MMC bindings
mmc: card: Fixup request missing in mmc_blk_issue_rw_rq
mmc: sdhci: fix low memory corruption
mmc: sdhci-pci: Change AMD SDHCI quirk application scope
i2c-piix4: Use Macro for AMD CZ SMBus device ID
pci_ids: Add AMD KERNCZ device ID support
mmc: queue: use swap() in mmc_queue_thread()
mmc: dw_mmc: insmod followed by rmmod will hung for eMMC
mmc: sdhci: Restore behavior while creating OCR mask
mmc: sdhci-pxav3: fix device wakeup initialization
mmc: core: Attach PM domain prior probing of SDIO func driver
mmc: core: Remove redundant ->power_restore() callback for SD
mmc: core: Remove redundant ->power_restore() callback for MMC
mmc: sdhci-bcm2835: Actually enable the clock
mmc: sdhci-bcm2835: Clean up platform allocations if sdhci init fails.
mmc: sdhci-of-esdhc: enable interrupt mode to detect card
mmc: sdhci-esdhc-imx: add quirk SDHCI_QUIRK2_BROKEN_HS200 for imx6qdl
...
Linus Torvalds [Tue, 23 Jun 2015 20:34:02 +0000 (13:34 -0700)]
Merge tag 'gpio-v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull gpio updates from Linus Walleij:
"This is the big bulk of GPIO changes queued for the v4.2 kernel
series:
- a big set of cleanups to the aged sysfs interface from Johan
Hovold. To get these in, v4.1-rc3 was merged into the tree as the
first patch in that series had to go into stable. This makes the
locking much more fine-grained (get rid of the "big GPIO lock(s)"
and store states in the GPIO descriptors.
- rename gpiod_[g|s]et_array() to gpiod_[g|s]et_array_value() to
avoid confusions.
- ACPI:
* make it possible to retrieve GpioInt resources from a GPIO
device using acpi_dev_gpio_irq_get()
* merge some dependent I2C changes exploiting this.
* support the ARM X-Gene GPIO standby driver.
- make it possible for the generic GPIO driver to read back the value
set registers to reflect current status.
* tag 'gpio-v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (71 commits)
gpio: Fix checkpatch.pl issues
gpio: pcf857x: handle only enabled irqs
gpio / ACPI: Return -EPROBE_DEFER if the gpiochip was not found
GPIO / ACPI: export acpi_gpiochip_request(free)_interrupts for module use
gpio: improve error reporting on own descriptors
gpio: promote own request failure to pr_err()
gpio: Added support to Zynq Ultrascale+ MPSoC
gpio: add ETRAXFS GPIO driver
fix documentation after renaming gpiod_set_array to gpiod_set_array_value
gpio: Add GPIO support for Broadcom STB SoCs
gpio: xgene: add ACPI support for APM X-Gene GPIO standby driver
gpio: tb10x: Drop unneeded free_irq() call
gpio: crystalcove: set IRQCHIP_SKIP_SET_WAKE for the irqchip
gpio: stp-xway: Use the of_property_read_u32 helper
gpio: pcf857x: Check for irq_set_irq_wake() failures
gpio-stp-xway: Fix enabling the highest bit of the PHY LEDs
gpio: Prevent an integer overflow in the pca953x driver
gpio: omap: rework omap_gpio_irq_startup to handle current pin state properly
gpio: omap: rework omap_gpio_request to touch only gpio specific registers
gpio: omap: rework omap_x_irq_shutdown to touch only irqs specific registers
...
Linus Torvalds [Tue, 23 Jun 2015 20:32:38 +0000 (13:32 -0700)]
Merge tag 'pwm/for-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This has a couple of fixes for Atmel, Samsung and Broadcom drivers.
Some preparatory patches for more upcoming Intel work is included as
well"
* tag 'pwm/for-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: lpss: pci: Add support for Broxton platform
pwm: bcm-kona: Don't set polarity in probe
pwm: Add pwmchip_add_with_polarity() API
pwm: atmel: Fix incorrect CDTY value after disabling
pwm: atmel: Fix incorrect CDTY value after enabling
pwm: samsung: Use MODULE_DEVICE_TABLE() to include OF modalias
pwm: Add support to remove registered consumer lookup tables
Pull crypto update from Herbert Xu:
"Here is the crypto update for 4.2:
API:
- Convert RNG interface to new style.
- New AEAD interface with one SG list for AD and plain/cipher text.
All external AEAD users have been converted.
- New asymmetric key interface (akcipher).
Algorithms:
- Chacha20, Poly1305 and RFC7539 support.
- New RSA implementation.
- Jitter RNG.
- DRBG is now seeded with both /dev/random and Jitter RNG. If kernel
pool isn't ready then DRBG will be reseeded when it is.
- DRBG is now the default crypto API RNG, replacing krng.
- 842 compression (previously part of powerpc nx driver).
Drivers:
- Accelerated SHA-512 for arm64.
- New Marvell CESA driver that supports DMA and more algorithms.
- Updated powerpc nx 842 support.
- Added support for SEC1 hardware to talitos"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (292 commits)
crypto: marvell/cesa - remove COMPILE_TEST dependency
crypto: algif_aead - Temporarily disable all AEAD algorithms
crypto: af_alg - Forbid the use internal algorithms
crypto: echainiv - Only hold RNG during initialisation
crypto: seqiv - Add compatibility support without RNG
crypto: eseqiv - Offer normal cipher functionality without RNG
crypto: chainiv - Offer normal cipher functionality without RNG
crypto: user - Add CRYPTO_MSG_DELRNG
crypto: user - Move cryptouser.h to uapi
crypto: rng - Do not free default RNG when it becomes unused
crypto: skcipher - Allow givencrypt to be NULL
crypto: sahara - propagate the error on clk_disable_unprepare() failure
crypto: rsa - fix invalid select for AKCIPHER
crypto: picoxcell - Update to the current clk API
crypto: nx - Check for bogus firmware properties
crypto: marvell/cesa - add DT bindings documentation
crypto: marvell/cesa - add support for Kirkwood and Dove SoCs
crypto: marvell/cesa - add support for Orion SoCs
crypto: marvell/cesa - add allhwsupport module parameter
crypto: marvell/cesa - add support for all armada SoCs
...
Linus Torvalds [Tue, 23 Jun 2015 02:42:56 +0000 (19:42 -0700)]
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"The irq departement delivers:
- plug a potential race related to chained interrupt handlers
- core updates which address the needs of the x86 irqdomain conversion
- new irqchip callback to support affinity settings for VCPUs
- the usual pile of updates to interrupt chip drivers
- a few helper functions to allow further cleanups and
simplifications
I have a largish pile of coccinelle scripted/verified cleanups and
simplifications pending on top of that, but I prefer to send that
towards the end of the merge window when the arch/driver changes have
hit your tree to avoid API change wreckage as far as possible"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
genirq: Remove bogus restriction in irq_move_mask_irq()
irqchip: atmel-aic5: Add sama5d2 support
irq: spear-shirq: Fix race in installing chained IRQ handler
irq: irq-keystone: Fix race in installing chained IRQ handler
gpio: gpio-tegra: Fix race in installing chained IRQ handler
gpio: gpio-mxs: Fix race in installing chained IRQ handler
gpio: gpio-mxc: Fix race in installing chained IRQ handler
ARM: gemini: Fix race in installing GPIO chained IRQ handler
GPU: ipu: Fix race in installing IPU chained IRQ handler
ARM: sa1100: convert SA11x0 related code to use new chained handler helper
irq: Add irq_set_chained_handler_and_data()
irqchip: exynos-combiner: Save IRQ enable set on suspend
genirq: Introduce helper function irq_data_get_affinity_mask()
genirq: Introduce helper function irq_data_get_node()
genirq: Introduce struct irq_common_data to host shared irq data
genirq: Prevent crash in irq_move_irq()
genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain
irqchip: gic: Simplify gic_configure_irq by using IRQCHIP_SET_TYPE_MASKED
irqchip: renesas: intc-irqpin: Improve binding documentation
genirq: Set IRQCHIP_SKIP_SET_WAKE for no_irq_chip
...
Linus Torvalds [Tue, 23 Jun 2015 02:20:04 +0000 (19:20 -0700)]
Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull NOHZ updates from Thomas Gleixner:
"A few updates to the nohz infrastructure:
- recursion protection for context tracking
- make the TIF_NOHZ inheritance smarter
- isolate cpus which belong to the NOHZ full set"
* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz: Set isolcpus when nohz_full is set
nohz: Add tick_nohz_full_add_cpus_to() API
context_tracking: Inherit TIF_NOHZ through forks instead of context switches
context_tracking: Protect against recursion
Linus Torvalds [Tue, 23 Jun 2015 01:57:44 +0000 (18:57 -0700)]
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"A rather largish update for everything time and timer related:
- Cache footprint optimizations for both hrtimers and timer wheel
- Lower the NOHZ impact on systems which have NOHZ or timer migration
disabled at runtime.
- Optimize run time overhead of hrtimer interrupt by making the clock
offset updates smarter
- hrtimer cleanups and removal of restrictions to tackle some
problems in sched/perf
- Some more leap second tweaks
- Another round of changes addressing the 2038 problem
- First step to change the internals of clock event devices by
introducing the necessary infrastructure
- Allow constant folding for usecs/msecs_to_jiffies()
- The usual pile of clockevent/clocksource driver updates
The hrtimer changes contain updates to sched, perf and x86 as they
depend on them plus changes all over the tree to cleanup API changes
and redundant code, which got copied all over the place. The y2038
changes touch s390 to remove the last non 2038 safe code related to
boot/persistant clock"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
clocksource: Increase dependencies of timer-stm32 to limit build wreckage
timer: Minimize nohz off overhead
timer: Reduce timer migration overhead if disabled
timer: Stats: Simplify the flags handling
timer: Replace timer base by a cpu index
timer: Use hlist for the timer wheel hash buckets
timer: Remove FIFO "guarantee"
timers: Sanitize catchup_timer_jiffies() usage
hrtimer: Allow hrtimer::function() to free the timer
seqcount: Introduce raw_write_seqcount_barrier()
seqcount: Rename write_seqcount_barrier()
hrtimer: Fix hrtimer_is_queued() hole
hrtimer: Remove HRTIMER_STATE_MIGRATE
selftest: Timers: Avoid signal deadlock in leap-a-day
timekeeping: Copy the shadow-timekeeper over the real timekeeper last
clockevents: Check state instead of mode in suspend/resume path
selftests: timers: Add leap-second timer edge testing to leap-a-day.c
ntp: Do leapsecond adjustment in adjtimex read path
time: Prevent early expiry of hrtimers[CLOCK_REALTIME] at the leap second edge
ntp: Introduce and use SECS_PER_DAY macro instead of 86400
...
Linus Torvalds [Tue, 23 Jun 2015 00:59:09 +0000 (17:59 -0700)]
Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Ingo Molnar:
"There were so many changes in the x86/asm, x86/apic and x86/mm topics
in this cycle that the topical separation of -tip broke down somewhat -
so the result is a more traditional architecture pull request,
collected into the 'x86/core' topic.
The topics were still maintained separately as far as possible, so
bisectability and conceptual separation should still be pretty good -
but there were a handful of merge points to avoid excessive
dependencies (and conflicts) that would have been poorly tested in the
end.
The next cycle will hopefully be much more quiet (or at least will
have fewer dependencies).
The main changes in this cycle were:
* x86/apic changes, with related IRQ core changes: (Jiang Liu, Thomas
Gleixner)
- This is the second and most intrusive part of changes to the x86
interrupt handling - full conversion to hierarchical interrupt
domains:
This now reflects the actual hardware and allowed us to distangle
the domain specific code from the underlying parent domain, which
can be optional in the case of interrupt remapping. It's a clear
separation of functionality and removes quite some duct tape
constructs which plugged the remap code between ioapic/msi/hpet
and the vector management.
- Intel IOMMU IRQ remapping enhancements, to allow direct interrupt
injection into guests (Feng Wu)
* x86/asm changes:
- Tons of cleanups and small speedups, micro-optimizations. This
is in preparation to move a good chunk of the low level entry
code from assembly to C code (Denys Vlasenko, Andy Lutomirski,
Brian Gerst)
- Moved all system entry related code to a new home under
arch/x86/entry/ (Ingo Molnar)
- Removal of the fragile and ugly CFI dwarf debuginfo annotations.
Conversion to C will reintroduce many of them - but meanwhile
they are only getting in the way, and the upstream kernel does
not rely on them (Ingo Molnar)
- NOP handling refinements. (Borislav Petkov)
* x86/mm changes:
- Big PAT and MTRR rework: making the code more robust and
preparing to phase out exposing direct MTRR interfaces to drivers -
in favor of using PAT driven interfaces (Toshi Kani, Luis R
Rodriguez, Borislav Petkov)
- New ioremap_wt()/set_memory_wt() interfaces to support
Write-Through cached memory mappings. This is especially
important for good performance on NVDIMM hardware (Toshi Kani)
* x86/ras changes:
- Add support for deferred errors on AMD (Aravind Gopalakrishnan)
This is an important RAS feature which adds hardware support for
poisoned data. That means roughly that the hardware marks data
which it has detected as corrupted but wasn't able to correct, as
poisoned data and raises an APIC interrupt to signal that in the
form of a deferred error. It is the OS's responsibility then to
take proper recovery action and thus prolonge system lifetime as
far as possible.
- Add support for Intel "Local MCE"s: upcoming CPUs will support
CPU-local MCE interrupts, as opposed to the traditional system-
wide broadcasted MCE interrupts (Ashok Raj)
- Misc cleanups (Borislav Petkov)
* x86/platform changes:
- Intel Atom SoC updates
... and lots of other cleanups, fixlets and other changes - see the
shortlog and the Git log for details"
* 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (222 commits)
x86/hpet: Use proper hpet device number for MSI allocation
x86/hpet: Check for irq==0 when allocating hpet MSI interrupts
x86/mm/pat, drivers/infiniband/ipath: Use arch_phys_wc_add() and require PAT disabled
x86/mm/pat, drivers/media/ivtv: Use arch_phys_wc_add() and require PAT disabled
x86/platform/intel/baytrail: Add comments about why we disabled HPET on Baytrail
genirq: Prevent crash in irq_move_irq()
genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain
iommu, x86: Properly handle posted interrupts for IOMMU hotplug
iommu, x86: Provide irq_remapping_cap() interface
iommu, x86: Setup Posted-Interrupts capability for Intel iommu
iommu, x86: Add cap_pi_support() to detect VT-d PI capability
iommu, x86: Avoid migrating VT-d posted interrupts
iommu, x86: Save the mode (posted or remapped) of an IRTE
iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip
iommu: dmar: Provide helper to copy shared irte fields
iommu: dmar: Extend struct irte for VT-d Posted-Interrupts
iommu: Add new member capability to struct irq_remap_ops
x86/asm/entry/64: Disentangle error_entry/exit gsbase/ebx/usermode code
x86/asm/entry/32: Shorten __audit_syscall_entry() args preparation
x86/asm/entry/32: Explain reloading of registers after __audit_syscall_entry()
...
Linus Torvalds [Tue, 23 Jun 2015 00:46:14 +0000 (17:46 -0700)]
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pul x86 microcode updates from Ingo Molnar:
"x86 microcode loader updates from Borislav Petkov:
- early parsing of the built-in microcode
- cleanups
- misc smaller fixes"
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode: Correct CPU family related variable types
x86/microcode: Disable builtin microcode loading on 32-bit for now
x86/microcode/intel: Rename get_matching_sig()
x86/microcode/intel: Simplify get_matching_sig()
x86/microcode/intel: Simplify update_match_cpu()
x86/microcode/intel: Rename get_matching_microcode
x86/cpu/microcode: Zap changelog
x86/microcode: Parse built-in microcode early
x86/microcode/intel: Remove unused @rev arg of get_matching_sig()
x86/microcode/intel: Get rid of revision_is_newer()
Linus Torvalds [Tue, 23 Jun 2015 00:40:55 +0000 (17:40 -0700)]
Merge branch 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 kdump updates from Ingo Molnar:
"Three kdump robustness related improvements (Joerg Roedel)"
* 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/crash: Allocate enough low memory when crashkernel=high
x86/swiotlb: Try coherent allocations with __GFP_NOWARN
swiotlb: Warn on allocation failure in swiotlb_alloc_coherent()
Linus Torvalds [Tue, 23 Jun 2015 00:16:11 +0000 (17:16 -0700)]
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 FPU updates from Ingo Molnar:
"This tree contains two main changes:
- The big FPU code rewrite: wide reaching cleanups and reorganization
that pulls all the FPU code together into a clean base in
arch/x86/fpu/.
The resulting code is leaner and faster, and much easier to
understand. This enables future work to further simplify the FPU
code (such as removing lazy FPU restores).
By its nature these changes have a substantial regression risk: FPU
code related bugs are long lived, because races are often subtle
and bugs mask as user-space failures that are difficult to track
back to kernel side backs. I'm aware of no unfixed (or even
suspected) FPU related regression so far.
- MPX support rework/fixes. As this is still not a released CPU
feature, there were some buglets in the code - should be much more
robust now (Dave Hansen)"
* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (250 commits)
x86/fpu: Fix double-increment in setup_xstate_features()
x86/mpx: Allow 32-bit binaries on 64-bit kernels again
x86/mpx: Do not count MPX VMAs as neighbors when unmapping
x86/mpx: Rewrite the unmap code
x86/mpx: Support 32-bit binaries on 64-bit kernels
x86/mpx: Use 32-bit-only cmpxchg() for 32-bit apps
x86/mpx: Introduce new 'directory entry' to 'addr' helper function
x86/mpx: Add temporary variable to reduce masking
x86: Make is_64bit_mm() widely available
x86/mpx: Trace allocation of new bounds tables
x86/mpx: Trace the attempts to find bounds tables
x86/mpx: Trace entry to bounds exception paths
x86/mpx: Trace #BR exceptions
x86/mpx: Introduce a boot-time disable flag
x86/mpx: Restrict the mmap() size check to bounds tables
x86/mpx: Remove redundant MPX_BNDCFG_ADDR_MASK
x86/mpx: Clean up the code by not passing a task pointer around when unnecessary
x86/mpx: Use the new get_xsave_field_ptr()API
x86/fpu/xstate: Wrap get_xsave_addr() to make it safer
x86/fpu/xstate: Fix up bad get_xsave_addr() assumptions
...
Linus Torvalds [Tue, 23 Jun 2015 00:10:44 +0000 (17:10 -0700)]
Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 EFI updates from Ingo Molnar:
"EFI changes:
- Use idiomatic negative error values in efivar_create_sysfs_entry()
instead of returning '1' to indicate error (Dan Carpenter)
- Implement new support to expose the EFI System Resource Tables in
sysfs, which provides information for performing firmware updates
(Peter Jones)
- Documentation cleanup in the EFI handover protocol section which
falsely claimed that 'cmdline_size' needed to be filled out by the
boot loader (Alex Smith)
- Align the order of SMBIOS tables in /sys/firmware/efi/systab to
match the way that we do things for ACPI and add documentation to
Documentation/ABI (Jean Delvare)"
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi: Work around ia64 build problem with ESRT driver
efi: Add 'systab' information to Documentation/ABI
efi: dmi: List SMBIOS3 table before SMBIOS table
efi/esrt: Fix some compiler warnings
x86, doc: Remove cmdline_size from list of fields to be filled in for EFI handover
efi: Add esrt support
efi: efivar_create_sysfs_entry() should return negative error codes
Linus Torvalds [Mon, 22 Jun 2015 23:43:01 +0000 (16:43 -0700)]
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 CPU features from Ingo Molnar:
"Various CPU feature support related changes: in particular the
/proc/cpuinfo model name sanitization change should be monitored, it
has a chance to break stuff. (but really shouldn't and there are no
regression reports)"
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/amd: Give access to the number of nodes in a physical package
x86/cpu: Trim model ID whitespace
x86/cpu: Strip any /proc/cpuinfo model name field whitespace
x86/cpu/amd: Set X86_FEATURE_EXTD_APICID for future processors
x86/gart: Check for GART support before accessing GART registers
Linus Torvalds [Mon, 22 Jun 2015 23:23:00 +0000 (16:23 -0700)]
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
"Misc cleanups"
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Clean up types in xlate_dev_mem_ptr() some more
x86: Deinline dma_free_attrs()
x86: Deinline dma_alloc_attrs()
x86: Remove unused TI_cpu
x86: Merge common 32-bit values in asm-offsets.c
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
sched/deadline: Remove needless parameter in dl_runtime_exceeded()
sched: Remove superfluous resetting of the p->dl_throttled flag
sched/deadline: Drop duplicate init_sched_dl_class() declaration
sched/deadline: Reduce rq lock contention by eliminating locking of non-feasible target
sched/deadline: Make init_sched_dl_class() __init
sched/deadline: Optimize pull_dl_task()
sched/preempt: Add static_key() to preempt_notifiers
sched/preempt: Fix preempt notifiers documentation about hlist_del() within unsafe iteration
sched/stop_machine: Fix deadlock between multiple stop_two_cpus()
sched/debug: Add sum_sleep_runtime to /proc/<pid>/sched
sched/debug: Replace vruntime with wait_sum in /proc/sched_debug
sched/debug: Properly format runnable tasks in /proc/sched_debug
sched/numa: Only consider less busy nodes as numa balancing destinations
Revert 095bebf61a46 ("sched/numa: Do not move past the balance point if unbalanced")
sched/fair: Prevent throttling in early pick_next_task_fair()
preempt: Reorganize the notrace definitions a bit
preempt: Use preempt_schedule_context() as the official tracing preemption point
sched: Make preempt_schedule_context() function-tracing safe
x86: Remove cpu_sibling_mask() and cpu_core_mask()
x86: Replace cpu_**_mask() with topology_**_cpumask()
...
Linus Torvalds [Mon, 22 Jun 2015 22:45:41 +0000 (15:45 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"These are the left over fixes from the v4.1 cycle"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Fix build breakage if prefix= is specified
perf/x86: Honor the architectural performance monitoring version
perf/x86/intel: Fix PMI handling for Intel PT
perf/x86/intel/bts: Fix DS area sharing with x86_pmu events
perf/x86: Add more Broadwell model numbers
perf: Fix ring_buffer_attach() RCU sync, again
Linus Torvalds [Mon, 22 Jun 2015 22:19:21 +0000 (15:19 -0700)]
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"Kernel side changes mostly consist of work on x86 PMU drivers:
- x86 Intel PT (hardware CPU tracer) improvements (Alexander
Shishkin)
- x86 Intel CQM (cache quality monitoring) improvements (Thomas
Gleixner)
- x86 Intel PEBSv3 support (Peter Zijlstra)
- x86 Intel PEBS interrupt batching support for lower overhead
sampling (Zheng Yan, Kan Liang)
- x86 PMU scheduler fixes and improvements (Peter Zijlstra)
There's too many tooling improvements to list them all - here are a
few select highlights:
'perf bench':
- Introduce new 'perf bench futex' benchmark: 'wake-parallel', to
measure parallel waker threads generating contention for kernel
locks (hb->lock). (Davidlohr Bueso)
'perf top', 'perf report':
- Allow disabling/enabling events dynamicaly in 'perf top':
a 'perf top' session can instantly become a 'perf report'
one, i.e. going from dynamic analysis to a static one,
returning to a dynamic one is possible, to toogle the
modes, just press 'f' to 'freeze/unfreeze' the sampling. (Arnaldo Carvalho de Melo)
- Make Ctrl-C stop processing on TUI, allowing interrupting the load of big
perf.data files (Namhyung Kim)
'perf probe': (Masami Hiramatsu)
- Support glob wildcards for function name
- Support $params special probe argument: Collect all function arguments
- Make --line checks validate C-style function name.
- Add --no-inlines option to avoid searching inline functions
- Greatly speed up 'perf probe --list' by caching debuginfo.
- Improve --filter support for 'perf probe', allowing using its arguments
on other commands, as --add, --del, etc.
'perf sched':
- Add option in 'perf sched' to merge like comms to lat output (Josef Bacik)
Plus tons of infrastructure work - in particular preparation for
upcoming threaded perf report support, but also lots of other work -
and fixes and other improvements. See (much) more details in the
shortlog and in the git log"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (305 commits)
perf tools: Configurable per thread proc map processing time out
perf tools: Add time out to force stop proc map processing
perf report: Fix sort__sym_cmp to also compare end of symbol
perf hists browser: React to unassigned hotkey pressing
perf top: Tell the user how to unfreeze events after pressing 'f'
perf hists browser: Honour the help line provided by builtin-{top,report}.c
perf hists browser: Do not exit when 'f' is pressed in 'report' mode
perf top: Replace CTRL+z with 'f' as hotkey for enable/disable events
perf annotate: Rename source_line_percent to source_line_samples
perf annotate: Display total number of samples with --show-total-period
perf tools: Ensure thread-stack is flushed
perf top: Allow disabling/enabling events dynamicly
perf evlist: Add toggle_enable() method
perf trace: Fix race condition at the end of started workloads
perf probe: Speed up perf probe --list by caching debuginfo
perf probe: Show usage even if the last event is skipped
perf tools: Move libtraceevent dynamic list to separated LDFLAGS variable
perf tools: Fix a problem when opening old perf.data with different byte order
perf tools: Ignore .config-detected in .gitignore
perf probe: Fix to return error if no probe is added
...
Linus Torvalds [Mon, 22 Jun 2015 21:54:22 +0000 (14:54 -0700)]
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes are:
- 'qspinlock' support, enabled on x86: queued spinlocks - these are
now the spinlock variant used by x86 as they outperform ticket
spinlocks in every category. (Waiman Long)
- 'pvqspinlock' support on x86: paravirtualized variant of queued
spinlocks. (Waiman Long, Peter Zijlstra)
- 'qrwlock' support, enabled on x86: queued rwlocks. Similar to
queued spinlocks, they are now the variant used by x86:
- various locking primitives cleanups, further WRITE_ONCE()
propagation"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
locking/lockdep: Remove hard coded array size dependency
locking/qrwlock: Don't contend with readers when setting _QW_WAITING
lockdep: Do not break user-visible string
locking/arch: Rename set_mb() to smp_store_mb()
locking/arch: Add WRITE_ONCE() to set_mb()
rtmutex: Warn if trylock is called from hard/softirq context
arch: Remove __ARCH_HAVE_CMPXCHG
locking/rtmutex: Drop usage of __HAVE_ARCH_CMPXCHG
locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS
locking/pvqspinlock: Rename QUEUED_SPINLOCK to QUEUED_SPINLOCKS
locking/pvqspinlock: Replace xchg() by the more descriptive set_mb()
locking/pvqspinlock, x86: Enable PV qspinlock for Xen
locking/pvqspinlock, x86: Enable PV qspinlock for KVM
locking/pvqspinlock, x86: Implement the paravirt qspinlock call patching
locking/pvqspinlock: Implement simple paravirt support for the qspinlock
locking/qspinlock: Revert to test-and-set on hypervisors
locking/qspinlock: Use a simple write to grab the lock
locking/qspinlock: Optimize for smaller NR_CPUS
locking/qspinlock: Extract out code snippets for the next patch
locking/qspinlock: Add pending bit
...
Linus Torvalds [Mon, 22 Jun 2015 21:01:01 +0000 (14:01 -0700)]
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
- Continued initialization/Kconfig updates: hide most Kconfig options
from unsuspecting users.
There's now a single high level configuration option:
*
* RCU Subsystem
*
Make expert-level adjustments to RCU configuration (RCU_EXPERT) [N/y/?] (NEW)
Which if answered in the negative, leaves us with a single
interactive configuration option:
Offload RCU callback processing from boot-selected CPUs (RCU_NOCB_CPU) [N/y/?] (NEW)
All the rest of the RCU options are configured automatically. Later
on we'll remove this single leftover configuration option as well.
- Remove all uses of RCU-protected array indexes: replace the
rcu_[access|dereference]_index_check() APIs with READ_ONCE() and
rcu_lockdep_assert()
- RCU CPU-hotplug cleanups
- Updates to Tiny RCU: a race fix and further code shrinkage.
- RCU torture-testing updates: fixes, speedups, cleanups and
documentation updates.
- Miscellaneous fixes
- Documentation updates
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
rcutorture: Allow repetition factors in Kconfig-fragment lists
rcutorture: Display "make oldconfig" errors
rcutorture: Update TREE_RCU-kconfig.txt
rcutorture: Make rcutorture scripts force RCU_EXPERT
rcutorture: Update configuration fragments for rcutree.rcu_fanout_exact
rcutorture: TASKS_RCU set directly, so don't explicitly set it
rcutorture: Test SRCU cleanup code path
rcutorture: Replace barriers with smp_store_release() and smp_load_acquire()
locktorture: Change longdelay_us to longdelay_ms
rcutorture: Allow negative values of nreaders to oversubscribe
rcutorture: Exchange TREE03 and TREE08 NR_CPUS, speed up CPU hotplug
rcutorture: Exchange TREE03 and TREE04 geometries
locktorture: fix deadlock in 'rw_lock_irq' type
rcu: Correctly handle non-empty Tiny RCU callback list with none ready
rcutorture: Test both RCU-sched and RCU-bh for Tiny RCU
rcu: Further shrink Tiny RCU by making empty functions static inlines
rcu: Conditionally compile RCU's eqs warnings
rcu: Remove prompt for RCU implementation
rcu: Make RCU able to tolerate undefined CONFIG_RCU_KTHREAD_PRIO
rcu: Make RCU able to tolerate undefined CONFIG_RCU_FANOUT_LEAF
...
Linus Torvalds [Mon, 22 Jun 2015 19:51:21 +0000 (12:51 -0700)]
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:
"In this pile: pathname resolution rewrite.
- recursion in link_path_walk() is gone.
- nesting limits on symlinks are gone (the only limit remaining is
that the total amount of symlinks is no more than 40, no matter how
nested).
- "fast" (inline) symlinks are handled without leaving rcuwalk mode.
- stack footprint (independent of the nesting) is below kilobyte now,
about on par with what it used to be with one level of nested
symlinks and ~2.8 times lower than it used to be in the worst case.
- struct nameidata is entirely private to fs/namei.c now (not even
opaque pointers are being passed around).
- ->follow_link() and ->put_link() calling conventions had been
changed; all in-tree filesystems converted, out-of-tree should be
able to follow reasonably easily.
For out-of-tree conversions, see Documentation/filesystems/porting
for details (and in-tree filesystems for examples of conversion).
That has sat in -next since mid-May, seems to survive all testing
without regressions and merges clean with v4.1"
* 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (131 commits)
turn user_{path_at,path,lpath,path_dir}() into static inlines
namei: move saved_nd pointer into struct nameidata
inline user_path_create()
inline user_path_parent()
namei: trim do_last() arguments
namei: stash dfd and name into nameidata
namei: fold path_cleanup() into terminate_walk()
namei: saner calling conventions for filename_parentat()
namei: saner calling conventions for filename_create()
namei: shift nameidata down into filename_parentat()
namei: make filename_lookup() reject ERR_PTR() passed as name
namei: shift nameidata inside filename_lookup()
namei: move putname() call into filename_lookup()
namei: pass the struct path to store the result down into path_lookupat()
namei: uninline set_root{,_rcu}()
namei: be careful with mountpoint crossings in follow_dotdot_rcu()
Documentation: remove outdated information from automount-support.txt
get rid of assorted nameidata-related debris
lustre: kill unused helper
lustre: kill unused macro (LOOKUP_CONTINUE)
...
The CESA driver calls phys_to_virt() which is not available on all
architectures.
Remove the depency on COMPILE_TEST to prevent building this driver on
non ARM architectures.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Suggested-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Mon, 22 Jun 2015 02:31:40 +0000 (10:31 +0800)]
crypto: algif_aead - Temporarily disable all AEAD algorithms
As the AEAD conversion is still ongoing, we do not yet wish to
export legacy AEAD implementations to user-space, as their calling
convention will change.
This patch actually disables all AEAD algorithms because some of
them (e.g., cryptd) will need to be modified to propagate this flag.
Subsequent patches will reenable them on an individual basis.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Mon, 22 Jun 2015 02:14:19 +0000 (10:14 +0800)]
crypto: af_alg - Forbid the use internal algorithms
The bit CRYPTO_ALG_INTERNAL was added to stop af_alg from accessing
internal algorithms. However, af_alg itself was never modified to
actually stop that bit from being used by the user. Therefore the
user could always override it by specifying the relevant bit in the
type and/or mask.
This patch silently discards the bit in both type and mask.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:49 +0000 (19:11 +0800)]
crypto: seqiv - Add compatibility support without RNG
When seqiv is used in compatibility mode, this patch allows it
to function even when an RNG Is not available. It also changes
the RNG allocation for the new explicit seqiv interface so that
we only hold a reference to the RNG during initialisation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:47 +0000 (19:11 +0800)]
crypto: eseqiv - Offer normal cipher functionality without RNG
The RNG may not be available during early boot, e.g., the relevant
modules may not be included in the initramfs. As the RNG Is only
needed for IPsec, we should not let this prevent use of ciphers
without IV generators, e.g., for disk encryption.
This patch postpones the RNG allocation to the init function so
that one failure during early boot does not make the RNG unavailable
for all subsequent users of the same cipher.
More importantly, it lets the cipher live even if RNG allocation
fails. Of course we no longer offer IV generation and which will
fail with an error if invoked. But all other cipher capabilities
will function as usual.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:46 +0000 (19:11 +0800)]
crypto: chainiv - Offer normal cipher functionality without RNG
The RNG may not be available during early boot, e.g., the relevant
modules may not be included in the initramfs. As the RNG Is only
needed for IPsec, we should not let this prevent use of ciphers
without IV generators, e.g., for disk encryption.
This patch postpones the RNG allocation to the init function so
that one failure during early boot does not make the RNG unavailable
for all subsequent users of the same cipher.
More importantly, it lets the cipher live even if RNG allocation
fails. Of course we no longer offer IV generation and which will
fail with an error if invoked. But all other cipher capabilities
will function as usual.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:45 +0000 (19:11 +0800)]
crypto: user - Add CRYPTO_MSG_DELRNG
This patch adds a new crypto_user command that allows the admin to
delete the crypto system RNG. Note that this can only be done if
the RNG is currently not in use. The next time it is used a new
system RNG will be allocated.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:43 +0000 (19:11 +0800)]
crypto: rng - Do not free default RNG when it becomes unused
Currently we free the default RNG when its use count hits zero.
This was OK when the IV generators would latch onto the RNG at
instance creation time and keep it until the instance is torn
down.
Now that IV generators only keep the RNG reference during init
time this scheme causes the default RNG to come and go at a high
frequencey. This is highly undesirable as we want to keep a single
RNG in use unless the admin wants it to be removed.
This patch changes the scheme so that the system RNG once allocated
is never removed unless a specifically requested.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Sun, 21 Jun 2015 11:11:41 +0000 (19:11 +0800)]
crypto: skcipher - Allow givencrypt to be NULL
Currently for skcipher IV generators they must provide givencrypt
as that is the whole point. We are currently replacing skcipher
IV generators with explicit IV generators. In order to maintain
backwards compatibility, we need to allow the IV generators to
still function as a normal skcipher when the RNG Is not present
(e.g., in the initramfs during boot). IOW everything but givencrypt
and givdecrypt will still work but those two will fail.
Therefore this patch assigns a default givencrypt that simply
returns an error should it be NULL.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Paul Gortmaker [Sat, 20 Jun 2015 23:02:32 +0000 (19:02 -0400)]
clocksource: Increase dependencies of timer-stm32 to limit build wreckage
This driver leaks out into arch/parisc builds that don't have
CONFIG_GENERIC_CLOCKEVENTS, leading to the following (truncated)
wreckage:
CC drivers/clocksource/timer-stm32.o
drivers/clocksource/timer-stm32.c:38:28: error: field 'evtdev' has incomplete type
drivers/clocksource/timer-stm32.c:44:19: warning: 'enum clock_event_mode' declared inside parameter list
drivers/clocksource/timer-stm32.c:44:19: warning: its scope is only this definition or declaration, which is probably not what you want
drivers/clocksource/timer-stm32.c:43:62: error: parameter 1 ('mode') has incomplete type
drivers/clocksource/timer-stm32.c:43:13: error: function declaration isn't a prototype
drivers/clocksource/timer-stm32.c: In function 'stm32_clock_event_set_mode':
drivers/clocksource/timer-stm32.c:47:3: error: type defaults to 'int' in declaration of '__mptr'
drivers/clocksource/timer-stm32.c:47:3: warning: initialization from incompatible pointer type
drivers/clocksource/timer-stm32.c:51:7: error: 'CLOCK_EVT_MODE_PERIODIC' undeclared (first use in this function)
drivers/clocksource/timer-stm32.c:51:7: note: each undeclared identifier is reported only once for each function it appears in
drivers/clocksource/timer-stm32.c:56:7: error: 'CLOCK_EVT_MODE_ONESHOT' undeclared (first use in this function)
Tighten up the dependencies to limit where it gets built by copying
the style of the Kconfig line for CLKSRC_EFM32 a few lines above.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Chanwoo Choi <cw00.choi@samsung.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Link: http://lkml.kernel.org/r/1434841352-24300-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Sun, 21 Jun 2015 14:21:50 +0000 (16:21 +0200)]
x86/hpet: Use proper hpet device number for MSI allocation
hpet_assign_irq() is called with hpet_device->num as "hardware
interrupt number", but hpet_device->num is initialized after the
interrupt has been assigned, so it's always 0. As a consequence only
the first MSI allocation succeeds, the following ones fail because the
"hardware interrupt number" already exists.
Move the initialization of dev->num and other fields before the call
to hpet_assign_irq(), which is the ordering before the offending
commit which introduced that regression.
Fixes: "3cb96f0c9733 x86/hpet: Enhance HPET IRQ to support hierarchical irqdomains" Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1506211635010.4107@nanos Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de>
Tadeusz Struk [Fri, 19 Jun 2015 17:27:39 +0000 (10:27 -0700)]
crypto: rsa - fix invalid select for AKCIPHER
Should be CRYPTO_AKCIPHER instead of AKCIPHER
Reported-by: Andreas Ruprecht <andreas.ruprecht@fau.de> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The picoXcell hardware crypto accelerator driver was using an
older version of the clk framework, and not (un)preparing the
clock before enabling/disabling it. This change uses the handy
clk_prepare_enable function to interact with the current clk
framework correctly.
Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Fri, 19 Jun 2015 04:07:54 +0000 (12:07 +0800)]
crypto: nx - Check for bogus firmware properties
The nx driver reads two crucial paramters from the firmware for
each crypto algorithm, the maximum SG list length and byte limit.
Unfortunately those two parameters may be bogus, or worse they
may be absent altogether. When this happens the algorithms will
still register successfully but will fail when used or tested.
This patch adds checks to report any firmware entries which are
found to be bogus, and avoid registering algorithms which have
bogus parameters. A warning is also printed when an algorithm
is not registered because of this as there may have been no firmware
entries for it at all.
Reported-by: Ondrej Moriš <omoris@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Linus Torvalds [Sat, 20 Jun 2015 20:54:22 +0000 (13:54 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"A smattering of fixes,
mgag200:
don't accept modes that aren't aligned properly as hw can't do it
i915:
two regression fixes
radeon:
one query to allow userspace fixes
one oops fixer for older hw with new options enabled"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon: don't probe MST on hw we don't support it on
drm/radeon: Add RADEON_INFO_VA_UNMAP_WORKING query
drm/mgag200: Reject non-character-cell-aligned mode widths
Revert "drm/i915: Don't skip request retirement if the active list is empty"
drm/i915: Always reset vma->ggtt_view.pages cache on unbinding
Thomas Gleixner [Sat, 20 Jun 2015 10:05:40 +0000 (12:05 +0200)]
genirq: Remove bogus restriction in irq_move_mask_irq()
If an interrupt is marked with the no balancing flag, we still allow
setting the affinity for such an interrupt from the kernel itself, but
for interrupts which move the affinity from interrupt context via
irq_move_mask_irq() this runs into a check for the no balancing flag,
which in turn ends up with an endless storm of stack dumps because the
move pending flag is not reset.
Allow the move for interrupts which have the no balancing flag set and
clear the move pending bit before checking for interrupts with the per
cpu flag set.
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiang Liu <jiang.liu@linux.intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1506201002570.4107@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Kan Liang [Wed, 17 Jun 2015 13:51:11 +0000 (09:51 -0400)]
perf tools: Configurable per thread proc map processing time out
The time out to limit the individual proc map processing was hard code
to 500ms. This patch introduce a new option --proc-map-timeout to make
the time limit configurable.
Kan Liang [Wed, 17 Jun 2015 13:51:10 +0000 (09:51 -0400)]
perf tools: Add time out to force stop proc map processing
System wide sampling like 'perf top' or 'perf record -a' read all
threads /proc/xxx/maps before sampling. If there are any threads which
generating a keeping growing huge maps, perf will do infinite loop
during synthesizing. Nothing will be sampled.
This patch fixes this issue by adding per-thread timeout to force stop
this kind of endless proc map processing.
PERF_RECORD_MISC_PROC_MAP_PARSE_TIME_OUT is introduced to indicate that
the mmap record are truncated by time out. User will get warning
notification when truncated mmap records are detected.
Reported-by: Ying Huang <ying.huang@intel.com> Signed-off-by: Kan Liang <kan.liang@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ying Huang <ying.huang@intel.com> Link: http://lkml.kernel.org/r/1434549071-25611-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Yannick Brosseau [Wed, 17 Jun 2015 23:41:10 +0000 (16:41 -0700)]
perf report: Fix sort__sym_cmp to also compare end of symbol
When using a map file from a JIT, due to memory reuse, we can obtain
multiple symbols with the same start address but a different length.
The symbols__find does check for the end so not doing it in
sort__sym_cmp was causing the hist_entry in the annotate part of a
report to match to the wrong entry, causing a fatal error.
Signed-off-by: Yannick Brosseau <scientist@fb.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: kernel-team@fb.com Link: http://lkml.kernel.org/r/1434584470-17771-1-git-send-email-scientist@fb.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf hists browser: Do not exit when 'f' is pressed in 'report' mode
The 'f' hotkey is only used when in 'top', dynamic mode, to
enable/disable events, currently not making sense in the 'report',
static mode, where we can't go from showing the histogram entries
created from a perf.data file to adding more events after recreating the
evlist created from the perf.data file, albeit possible, this is not
implemented right now.
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-lholzf472pu98dkkijggwx2m@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf top: Replace CTRL+z with 'f' as hotkey for enable/disable events
I.e. 'freeze'/'unfreeze', this is because CTRL+z has a well known
action, i.e. suspend the app, perf needs to follow that convention, that
will be done on a separate patch, tho.
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-oedcl6ovohara4koig14ayip@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Martin Liška [Fri, 19 Jun 2015 19:10:43 +0000 (16:10 -0300)]
perf annotate: Display total number of samples with --show-total-period
To compare two records on an instruction base, with --show-total-period
option provided, display total number of samples that belong to a line
in assembly language.
New hot key 't' is introduced for 'perf annotate' TUI.
Signed-off-by: Martin Liska <mliska@suse.cz> Cc: Andi Kleen <andi@firstfloor.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/5583E26D.1040407@suse.cz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Adrian Hunter [Fri, 29 May 2015 13:33:30 +0000 (16:33 +0300)]
perf tools: Ensure thread-stack is flushed
The thread-stack represents a thread's current stack. When a thread
exits there can still be many functions on the stack e.g. exit() can be
called many levels deep, so all the callers will never return. To get
that information output, the thread-stack must be flushed.
Previously it was assumed the thread-stack would be flushed when the
struct thread was deleted. With thread ref-counting it is no longer
clear when that will be, if ever. So instead explicitly flush all the
thread-stacks at the end of a session.
Linus Torvalds [Fri, 19 Jun 2015 17:34:14 +0000 (07:34 -1000)]
Merge tag 'sound-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Nothing looks scary, just a few usual HD-audio regression fixes and
fixup, in addition to a minor Kconfig dependency fix for the old MIPS
drivers"
* tag 'sound-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix unused label skip_i915
ALSA: hda - Fix noisy outputs on Dell XPS13 (2015 model)
ALSA: mips: let SND_SGI_O2 select SND_PCM
ALSA: hda - Fix audio crackles on Dell Latitude E7x40
ALSA: hda - adding a DAC/pin preference map for a HP Envy TS machine
Arnaud Ebalard [Thu, 18 Jun 2015 13:46:29 +0000 (15:46 +0200)]
crypto: marvell/cesa - add support for Kirkwood and Dove SoCs
Add the Kirkwood and Dove SoC descriptions, and control the allhwsupport
module parameter to avoid probing the CESA IP when the old CESA driver is
enabled (unless it is explicitly requested to do so).
Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Boris BREZILLON [Thu, 18 Jun 2015 13:46:28 +0000 (15:46 +0200)]
crypto: marvell/cesa - add support for Orion SoCs
Add the Orion SoC description, and select this implementation by default
to support non-DT probing: Orion is the only platform where non-DT boards
are declaring the CESA block.
Control the allhwsupport module parameter to avoid probing the CESA IP when
the old CESA driver is enabled (unless it is explicitly requested to do
so).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The old and new marvell CESA drivers both support Orion and Kirkwood SoCs.
Add a module parameter to choose whether these SoCs should be attached to
the new or the old driver.
The default policy is to keep attaching those IPs to the old driver if it
is enabled, until we decide the new CESA driver is stable/secure enough.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Boris BREZILLON [Thu, 18 Jun 2015 13:46:21 +0000 (15:46 +0200)]
crypto: marvell/cesa - add TDMA support
The CESA IP supports CPU offload through a dedicated DMA engine (TDMA)
which can control the crypto block.
When you use this mode, all the required data (operation metadata and
payload data) are transferred using DMA, and the results are retrieved
through DMA when possible (hash results are not retrieved through DMA yet),
thus reducing the involvement of the CPU and providing better performances
in most cases (for small requests, the cost of DMA preparation might
exceed the performance gain).
Note that some CESA IPs do not embed this dedicated DMA, hence the
activation of this feature on a per platform basis.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Boris BREZILLON [Thu, 18 Jun 2015 13:46:20 +0000 (15:46 +0200)]
crypto: marvell/cesa - add a new driver for Marvell's CESA
The existing mv_cesa driver supports some features of the CESA IP but is
quite limited, and reworking it to support new features (like involving the
TDMA engine to offload the CPU) is almost impossible.
This driver has been rewritten from scratch to take those new features into
account.
This commit introduce the base infrastructure allowing us to add support
for DMA optimization.
It also includes support for one hash (SHA1) and one cipher (AES)
algorithm, and enable those features on the Armada 370 SoC.
Other algorithms and platforms will be added later on.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Boris BREZILLON [Thu, 18 Jun 2015 13:46:19 +0000 (15:46 +0200)]
crypto: mv_cesa - explicitly define kirkwood and dove compatible strings
We are about to add a new driver to support new features like using the
TDMA engine to offload the CPU.
Orion, Dove and Kirkwood platforms are already using the mv_cesa driver,
but Orion SoCs do not embed the TDMA engine, which means we will have to
differentiate them if we want to get TDMA support on Dove and Kirkwood.
In the other hand, the migration from the old driver to the new one is not
something all people are willing to do without first auditing the new
driver.
Hence we have to support the new compatible in the mv_cesa driver so that
new platforms with updated DTs can still attach their crypto engine device
to this driver.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Boris BREZILLON [Thu, 18 Jun 2015 13:46:18 +0000 (15:46 +0200)]
crypto: mv_cesa - use gen_pool to reserve the SRAM memory region
The mv_cesa driver currently expects the SRAM memory region to be passed
as a platform device resource.
This approach implies two drawbacks:
- the DT representation is wrong
- the only one that can access the SRAM is the crypto engine
The last point is particularly annoying in some cases: for example on
armada 370, a small region of the crypto SRAM is used to implement the
cpuidle, which means you would not be able to enable both cpuidle and the
CESA driver.
To address that problem, we explicitly define the SRAM device in the DT
and then reference the sram node from the crypto engine node.
Also note that the old way of retrieving the SRAM memory region is still
supported, or in other words, backward compatibility is preserved.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu [Fri, 19 Jun 2015 14:07:07 +0000 (22:07 +0800)]
Merge branch 'mvebu/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Merge the mvebu/drivers branch of the arm-soc tree which contains
just a single patch bfa1ce5f38938cc9e6c7f2d1011f88eba2b9e2b2 ("bus:
mvebu-mbus: add mv_mbus_dram_info_nooverlap()") that happens to be
a prerequisite of the new marvell/cesa crypto driver.
Thomas Gleixner [Tue, 26 May 2015 22:50:35 +0000 (22:50 +0000)]
timer: Minimize nohz off overhead
If nohz is disabled on the kernel command line the [hr]timer code
still calls wake_up_nohz_cpu() and tick_nohz_full_cpu(), a pretty
pointless exercise. Cache nohz_active in [hr]timer per cpu bases and
avoid the overhead.
We probably should have a cached value for nohz full in the per cpu
bases as well to avoid the cpumask check. The base cache line is hot
already, the cpumask not necessarily.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Joonwoo Park <joonwoop@codeaurora.org> Cc: Wenbo Wang <wenbo.wang@memblaze.com> Link: http://lkml.kernel.org/r/20150526224512.207378134@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Tue, 26 May 2015 22:50:33 +0000 (22:50 +0000)]
timer: Reduce timer migration overhead if disabled
Eric reported that the timer_migration sysctl is not really nice
performance wise as it needs to check at every timer insertion whether
the feature is enabled or not. Further the check does not live in the
timer code, so we have an extra function call which checks an extra
cache line to figure out that it is disabled.
We can do better and store that information in the per cpu (hr)timer
bases. I pondered to use a static key, but that's a nightmare to
update from the nohz code and the timer base cache line is hot anyway
when we select a timer base.
The old logic enabled the timer migration unconditionally if
CONFIG_NO_HZ was set even if nohz was disabled on the kernel command
line.
With this modification, we start off with migration disabled. The user
visible sysctl is still set to enabled. If the kernel switches to NOHZ
migration is enabled, if the user did not disable it via the sysctl
prior to the switch. If nohz=off is on the kernel command line,
migration stays disabled no matter what.
Thomas Gleixner [Tue, 26 May 2015 22:50:31 +0000 (22:50 +0000)]
timer: Stats: Simplify the flags handling
Simplify the handling of the flag storage for the timer statistics. No
intermediate storage anymore. Just hand over the flags field.
I left the printout of 'deferrable' for now because changing this
would be an ABI update and I have no idea how strong people feel about
that. OTOH, I wonder whether we should kill the whole timer stats
stuff because all of that information can be retrieved via ftrace/perf
as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Joonwoo Park <joonwoop@codeaurora.org> Cc: Wenbo Wang <wenbo.wang@memblaze.com> Link: http://lkml.kernel.org/r/20150526224512.046626248@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Tue, 26 May 2015 22:50:29 +0000 (22:50 +0000)]
timer: Replace timer base by a cpu index
Instead of storing a pointer to the per cpu tvec_base we can simply
cache a CPU index in the timer_list and use that to get hold of the
correct per cpu tvec_base. This is only used in lock_timer_base() and
the slightly larger code is peanuts versus the spinlock operation and
the d-cache foot print of the timer wheel.
Aside of that this allows to get rid of following nuisances:
- boot_tvec_base
That statically allocated 4k bss data is just kept around so the
timer has a home when it gets statically initialized. It serves no
other purpose.
With the CPU index we assign the timer to CPU0 at static
initialization time and therefor can avoid the whole boot_tvec_base
dance. That also simplifies the init code, which just can use the
per cpu base.
Before:
text data bss dec hex filename
17491 9201 4160 30852 7884 ../build/kernel/time/timer.o
After:
text data bss dec hex filename
17440 9193 0 26633 6809 ../build/kernel/time/timer.o
- Overloading the base pointer with various flags
The CPU index has enough space to hold the flags (deferrable,
irqsafe) so we can get rid of the extra masking and bit fiddling
with the base pointer.
As a benefit we reduce the size of struct timer_list on 64 bit
machines. 4 - 8 bytes, a size reduction up to 15% per struct timer_list,
which is a real win as we have tons of them embedded in other structs.
This changes also the newly added deferrable printout of the timer
start trace point to capture and print all timer->flags, which allows
us to decode the target cpu of the timer as well.
We might have used bitfields for this, but that would change the
static initializers and the init function for no value to accomodate
big endian bitfields.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Joonwoo Park <joonwoop@codeaurora.org> Cc: Wenbo Wang <wenbo.wang@memblaze.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Badhri Jagan Sridharan <Badhri@google.com> Link: http://lkml.kernel.org/r/20150526224511.950084301@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixner [Tue, 26 May 2015 22:50:26 +0000 (22:50 +0000)]
timer: Remove FIFO "guarantee"
The FIFO guarantee is only there if two timers are queued into the
same bucket at the same jiffie on the same cpu:
- The slack value depends on the delta between expiry and enqueue
time, so the resulting expiry time can be different for timers
which are queued in different jiffies.
- Timers which are queued into the secondary array end up after a
later queued timer which was queued into the primary array due to
cascading.
- Timers can end up on different cpus due to the NOHZ target moving
around. Obviously there is no guarantee of expiry ordering between
cpus.
So anything which relies on FIFO behaviour of the timer wheel is
broken already.
This is a preparatory patch for converting the timer wheel to hlist
which reduces the memory foot print of the wheel by 50%.
It's a seperate patch so any (unlikely to happen) regression caused by
this can be identified clearly.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Joonwoo Park <joonwoop@codeaurora.org> Cc: Wenbo Wang <wenbo.wang@memblaze.com> Cc: George Spelvin <linux@horizon.com> Link: http://lkml.kernel.org/r/20150526224511.757520403@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
projects / linux-beck.git / log