1. 11 Jan, 2016 27 commits
    • Linus Torvalds's avatar
      Merge tag 'leds-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds · 2c487121
      Linus Torvalds authored
      Pull LED subsystem updates from Jacek Anaszewski:
       "Besides regular driver updates, we introduce a portion of LED core
        improvements, that allow to avoid the need for using work queues in
        the LED class drivers, that set brightness in a blocking way.
      
        Affected LED class drivers are being optimized accordingly.
      
         - LED core improvements:
              - use EXPORT_SYMBOL_GPL consistently,
              - add two new LED_BLINK_ flags,
              - rename brightness_set_sync op to brightness_set_blocking,
              - add led_set_brightness_nosleep{nopm} functions,
              - use set_brightness_work for the blocking op,
              - drivers shouldn't enforce SYNC/ASYNC brightness setting,
              - turn off the LED and wait for completion on unregistering LED
                class device,
              - add managed version of led_trigger_register,
              - add description of brightness setting API to the LED class doc.
      
         - Remove work queues from drivers: leds-tlc591xx, leds-88pm860x, leds-adp5520,
              leds-bd2802, leds-blinkm, leds-lm3533, leds-lm3642, leds-pca9532,
              leds-lp3944, leds-lp55xx, leds-lp8788, leds-lp8860, leds-pca955x,
              leds-pca963x, leds-wm831x, leds-da903x, leds-da9052, leds-dac124d085,
              leds-lt3593, leds-max8997, leds-mc13783, leds-regulator, leds-wm8350,
              leds-max77693, leds-aat1290, leds-ktd2692, leds-gpio, leds-pwm,
              leds-lm355x, leds-ns2.
      
         - Replace brightness_set op with a new brightness_set_blocking op to
           make the drivers compatible with led triggers: leds-ipaq-micro,
           leds-powernv.
      
         - Add missing of_node_put: leds-ktd2692, leds-aat1290, leds-max77693.
      
         - Make the driver explicitly non-modular: ledtrig-cpu,
           ledtrig-ide-disk, leds-syscon.
      
         - Improvements to leds-bcm6328:
              - reuse bcm6328_led_set() instead of copying its functionality,
              - swap LED ON and OFF definitions,
              - improve blink support,
              - simplify duplicated unlock in bcm6328_blink_set,
              - add little endian support,
              - remove unneded lock when checking initial LED status,
              - add HAS_IOMEM dependency,
              - code cleaning.
      
         - Improvements to leds-bcm6358:
              - use bcm6358_led_set() in order to get rid of the lock,
              - merge bcm6358_led_mode and bcm6358_led_set,
              - add little endian support,
              - remove unneded lock when checking initial LED status,
              - add HAS_IOMEM dependency,
              - remove unneeded busy status check.
      
         - Call led_pwm_set() in leds-pwm to enforce default LED_OFF.
      
         - Fix duration to be msec instead of jiffies: ledtrig-transient.
      
         - Removing NULL check: leds-powernv.
      
         - Use platform_register/unregister_drivers(): leds-sunfire.
      
         - Fix module license specification: ledtrig-oneshot.
      
         - Fix driver description and make license match the header: leds-pwm.
      
         - Remove checking for state < 1 in flash_strobe_store():
           led-class-flash.
      
         - Use led_set_brightness_sync for torch brightness:
           v4l2-flash-led-class"
      
      * tag 'leds-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: (68 commits)
        leds: add HAS_IOMEM dependency to LEDS_BCM6328/LEDS_BCM6358
        leds: core: add managed version of led_trigger_register
        leds: bcm6358: remove unneeded busy status check
        leds: bcm6328: improve blink support
        leds: bcm6358: merge bcm6358_led_mode and bcm6358_led_set
        leds: bcm6328: simplify duplicated unlock in bcm6328_blink_set
        leds: bcm6358: add little endian support
        leds: bcm6328: add little endian support
        leds: bcm6358: remove unneded lock when checking initial LED status
        leds: bcm6358: Use bcm6358_led_set() in order to get rid of the lock
        leds: bcm6328: remove unneded lock when checking initial LED
        leds: bcm6328: code cleaning
        leds: syscon: Make the driver explicitly non-modular
        leds: ledtrig-ide-disk: Make the driver explicitly non-modular
        leds: ledtrig-cpu: Make the driver explicitly non-modular
        leds: sunfire: Use platform_register/unregister_drivers()
        leds: max77693: Add missing of_node_put
        leds: aat1290: Add missing of_node_put
        leds: powernv: Implement brightness_set_blocking op
        leds: ipaq-micro: Implement brightness_set_blocking op
        ...
      2c487121
    • Linus Torvalds's avatar
      Merge tag 'edac_for_4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp · d870a9d5
      Linus Torvalds authored
      Pull EDAC updates from Borislav Petkov:
      
       - hide EDAC workqueue from users (Borislav Petkov)
      
       - edac_subsys init/teardown cleanup (Borislav Petkov)
      
       - make mpc85xx-pci-edac a platform device (Scott Wood)
      
       - sb_edac KNL gen2 support (Jim Snow)
      
       - other small cleanups all over the place
      
      * tag 'edac_for_4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
        EDAC, i5100: Use to_delayed_work()
        MAINTAINERS: Fix EDAC repo URLs format
        EDAC, sb_edac: Set fixed DIMM width on Xeon Knights Landing
        EDAC: Rework workqueue handling
        EDAC: Make edac_device workqueue setup/teardown functions static
        EDAC: Remove edac_get_sysfs_subsys() error handling
        EDAC: Unexport and make edac_subsys static
        EDAC: Rip out the edac_subsys reference counting
        EDAC: Robustify workqueues destruction
        EDAC, mc_sysfs: Fix freeing bus' name
        EDAC, mpc85xx: Make mpc85xx-pci-edac a platform device
        EDAC, sb_edac: Add Knights Landing (Xeon Phi gen 2) support
        EDAC, sb_edac: Add support for duplicate device IDs
        EDAC, sb_edac: Virtualize several hard-coded functions
        EDAC, mv64x60: Use platform_register/unregister_drivers()
        EDAC, mpc85xx: Use platform_register/unregister_drivers()
        EDAC: Add DDR4 flag
        EDAC: Remove references to bluesmoke.sourceforge.net
        EDAC, pci: Remove old disabled code
      d870a9d5
    • Linus Torvalds's avatar
      Merge tag 'hwmon-for-linus-v4.5' of... · 2634bf25
      Linus Torvalds authored
      Merge tag 'hwmon-for-linus-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
      
      Pull hwmon updates from Guenter Roeck:
       "Notable hwmon changes:
      
         - Add basic support for NCT6683 on Mitac boards
         - Add support for AMD new 15h processors to fam15h_power driver
         - Add pmbus client driver for LTC3815
         - Remove htu21 driver (now supported by iio subsystem)"
      
      * tag 'hwmon-for-linus-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
        hwmon: (nct6683) Add basic support for NCT6683 on Mitac boards
        hwmon: (ibmaem) constify aem_rw_sensor_template and aem_ro_sensor_template structures
        hwmon: (nct6683,nct6775) constify sensor_template_group structures
        MAINTAINERS: change the maintainer of fam15h_power driver
        hwmon: (fam15h_power) Add support for AMD new 15h processors
        hwmon: (pmbus) Add client driver for LTC3815
        hwmon: (htu21) Remove driver
      2634bf25
    • Linus Torvalds's avatar
      Merge tag 'regmap-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · e795e5f4
      Linus Torvalds authored
      Pull regmap updates from Mark Brown:
       "There's no real overall theme to the regmap changes for this release,
        it's a collection of individual features.  The main bits are:
      
         - Support for 64 bit registers, mainly for MMIO use, from Xiubo Li.
      
         - Support for trigger type configuration for regmap-irq from Laxman
           Dewangan.
      
         - Use native physical I/O for MMIO register maps to avoid confusion
           with the conversions that readl() and writel() do to little endian
           on big endian systems (with some DT updates to fix some workarounds
           people were doing), code from Simon Arlott.
      
         - Use a binary search rather than iteraton to improve the runtime
           performance of the rbtree code from Nikesh Oswal"
      
      * tag 'regmap-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
        regmap: debugfs: Use seq_file for the access map
        regmap: irq: add support for configuration of trigger type
        regmap: use IS_ALIGNED instead of % to improve the performance
        regmap: cache: Move the num_reg_defaults check as early as possible
        regmap: cache: Add warning info for the cache check
        regmap: missing case statement
        regmap: shift wrapping bugs in 64 bit code
        regmap: cache: Add 64-bit mode support
        regmap: cache: To suppress the noise of checkpatch
        regmap: fix the warning about unused variable
        regmap: add 64-bit mode support
        regmap: mmio: Add regmap_mmio_get_min_stride
        regmap: mmio: remove the useless code
        regmap: Fix leftover from struct reg_default to struct reg_sequence change
        regmap: replace kmalloc with kmalloc_array
        regmap: replace kzalloc with kcalloc
        regmap: rbtree: When adding a reg do a bsearch for target node
        regmap-mmio: Use native endianness for read/write
      e795e5f4
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 581dbc8b
      Linus Torvalds authored
      Pull pin control updates from Linus Walleij:
       "This is the bulk of pin control patches for the v4.5 series.
      
        Notably I have a patch to driver core from Stephen Boyd in the pull
        request, this has been ACKed by Greg so it should be OK.  The internal
        API needed some tweaking to allow modular Qualcomm pin controllers.
      
        There is a bit of development history in here but it should all add up
        nicely and has boiled in linux-next.  For example I merged in v4.4-rc5
        to get rid of some nasty merge conflicts.
      
        Summary:
      
         - New drivers:
            - PXA2xx pin controller support
            - Broadcom NSP pin controller support
      
         - New subdrivers:
            - Samsung EXYNOS5410 support
            - Qualcomm MSM8996 support
            - Qualcomm PM8994 support
            - Qualcomm PM8994 MPP support
            - Allwinner sunxi H3 support
            - Allwinner sunxi A80 support
            - Rockchip RK3228 support
      
         - Rename the Cygnus pinctrl driver to "iproc" as it is more generic
           than was originally thought.
      
         - A bunch of Lantiq/Xway updates especially from the OpenWRT people.
      
         - Several refactorings for the Super-H SH PFC pin controllers.
           Adding SCIF_CLK support.
      
         - Several fixes to the Atlas 7 driver.
      
         - Various fixes all over the place"
      
      * tag 'pinctrl-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (91 commits)
        pinctrl: mediatek: Modify pinctrl bindings for mt2701
        Revert "pinctrl: qcom: make PMIC drivers bool"
        pinctrl: qcom: Use platform_irq_count() instead of of_irq_count()
        driver-core: platform: Add platform_irq_count()
        pinctrl: lantiq: 2 pins have the wrong mux list
        pinctrl: qcom: make PMIC drivers bool
        pinctrl: nsp-gpio: forever loop in nsp_gpio_get_strength()
        pinctrl: mediatek: convert to arch_initcall
        pinctrl: bcm2835: Fix memory leak in error path
        pinctrl: mediatek: add missing of_node_put
        pinctrl: rockchip: add missing of_node_put
        pinctrl: sh-pfc: add missing of_node_put
        pinctrl: sirf: add missing of_node_put
        pinctrl-tegra: add missing of_node_put
        pinctrl: sunxi: Add A80 special pin controller
        pinctrl: bcm/cygnys/iproc: fixup rebase issue
        pinctrl: fixup problematic flag
        MAINTAINERS: Add co-maintainer for Renesas Pin Controllers
        pinctrl: sh-pfc: r8a7791: add EtherAVB pin groups
        pinctrl: sh-pfc: r8a7795: Add SATA support
        ...
      581dbc8b
    • Linus Torvalds's avatar
      Merge tag 'mmc-v4.5' of git://git.linaro.org/people/ulf.hansson/mmc · fb591fbd
      Linus Torvalds authored
      Pull MMC updates from Ulf Hansson:
       "MMC core:
         - Optimize boot time by detecting cards simultaneously
         - Make runtime resume default behavior for MMC/SD
         - Enable MMC/SD/SDIO devices to suspend/resume asynchronously
         - Allow more than 8 partitions per card
         - Introduce MMC_CAP2_NO_SDIO to prevent unsupported SDIO commands
         - Support the standard DT wakeup-source property
         - Fix driver strength switching for HS200 and HS400
         - Fix switch command timeout
         - Fix invalid vdd in voltage switch power cycle for SDIO
      
        MMC host:
         - sdhci: Restore behavior when setting VDD via external regulator
         - sdhci: A couple of changes/fixes related to the dma support
         - sdhci-tegra: Add Tegra210 support
         - sdhci-tegra: Support for UHS-I cards including tuning support
         - sdhci-of-at91: Add PM support
         - sh_mmcif: Rework dma channel handling
         - mvsdio: Delete platform data code path"
      
      * tag 'mmc-v4.5' of git://git.linaro.org/people/ulf.hansson/mmc: (52 commits)
        mmc: dw_mmc: remove the unused quirks
        mmc: sdhci-pci: use to_pci_dev()
        mmc: cb710: use to_platform_device()
        mmc: tegra: use correct accessor for misc ctrl register
        mmc: tegra: enable UHS-I modes
        mmc: tegra: implement UHS tuning
        mmc: tegra: disable SPI_MODE_CLKEN
        mmc: tegra: implement module external clock change
        mmc: sdhci: restore behavior when setting VDD via external regulator
        mmc: It is not an error for the card to be removed while suspended
        mmc: block: Allow more than 8 partitions per card
        mmc: core: Optimize boot time by detecting cards simultaneously
        mmc: dw_mmc: use resource_size_t to store physical address
        mmc: core: fix __mmc_switch timeout caused by preempt
        mmc: usdhi6rol0: handle NULL data in timeout
        mmc: of_mmc_spi: Add IRQF_ONESHOT to interrupt flags
        mmc: mediatek: change some dev_err to dev_dbg
        mmc: enable MMC/SD/SDIO device to suspend/resume asynchronously
        mmc: sdhci: Fix sdhci_runtime_pm_bus_on/off()
        mmc: sdhci: 64-bit DMA actually has 4-byte alignment
        ...
      fb591fbd
    • Linus Torvalds's avatar
      Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata · 8c930204
      Linus Torvalds authored
      Pull libata updates from Tejun Heo:
       "Mostly low level driver specific changes.
      
        Two changes are somewhat noteworthy.  First, Dan's patchset to support
        per-port msix interrupt handling for ahci, which was tried last cycle
        but had to be backed out due to a couple issues, is back and seems to
        be working fine.  Second, libata exception handling now uses
        usleep_range() instead of msleep() for sleeps < 20ms which can make
        things snappier in some corner cases"
      
      * 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
        libata: skip debounce delay on link resume
        ata: ahci_brcmstb: disable DIPM support
        ata: ahci_brcmstb: enable support for ALPM
        drivers: libata-core: Use usleep_range() instead of msleep() for short sleeps (<20 ms)
        sata_sx4: correctly handling failed allocation
        ata: ahci_brcmstb: add support for MIPS-based platforms
        ahci: qoriq: Adjust the default register values on ls1021a
        ahci: qoriq: Update the default Rx watermark value
        ahci: qoriq: Adjust the default register values on ls1043a
        ahci: compile out msi/msix infrastructure
        ata: core: fix irq description on AHCI single irq systems
        ata: ahci_brcmstb: remove unused definitions
        ata: ahci_brcmstb: add a quirk for MIPS-based platforms
        ata: ahci_brcmstb: disable NCQ for MIPS-based platforms
        ata: sata_rcar: Remove obsolete platform_device_id entries
        sata_rcar: Add compatible string for r8a7795
        ahci: kill 'intr_status'
        ahci: switch from 'threaded' to 'hardirq' interrupt handling
        ahci: per-port msix support
      8c930204
    • Linus Torvalds's avatar
      Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu · 367262c1
      Linus Torvalds authored
      Pull percpu updates from Tejun Heo:
       "Two trivial percpu patches for v4.5-rc1"
      
      * 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
        percpu: remove PERCPU_ENOUGH_ROOM which is stale definition
        percpu: Remove unneeded return from void function
      367262c1
    • Linus Torvalds's avatar
      Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · 0f8c7901
      Linus Torvalds authored
      Pull workqueue update from Tejun Heo:
       "Workqueue changes for v4.5.  One cleanup patch and three to improve
        the debuggability.
      
        Workqueue now has a stall detector which dumps workqueue state if any
        worker pool hasn't made forward progress over a certain amount of time
        (30s by default) and also triggers a warning if a workqueue which can
        be used in memory reclaim path tries to wait on something which can't
        be.
      
        These should make workqueue hangs a lot easier to debug."
      
      * 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: simplify the apply_workqueue_attrs_locked()
        workqueue: implement lockup detector
        watchdog: introduce touch_softlockup_watchdog_sched()
        workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
      0f8c7901
    • Linus Torvalds's avatar
      Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3d116a66
      Linus Torvalds authored
      Pull irq updates from Thomas Gleixner:
       "The irq department provides:
      
         - Support for MSI to wire bridges and a first user of it
      
         - More ACPI support for ARM/GIC
      
         - A new TS-4800 interrupt controller driver
      
         - RCU based free of interrupt descriptors to support the upcoming
           Intel VMD technology without introducing a locking nightmare
      
         - The usual pile of fixes and updates to drivers and core code"
      
      * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
        irqchip/omap-intc: Add support for spurious irq handling
        irqchip/zevio: Use irq_data_get_chip_type() helper
        irqchip/omap-intc: Remove duplicate setup for IRQ chip type handler
        irqchip/ts4800: Add TS-4800 interrupt controller
        irqchip/ts4800: Add documentation for TS-4800 interrupt controller
        irq/platform-MSI: Increase the maximum MSIs the MSI framework can support
        irqchip/gicv2m: Miscellaneous fixes for v2m resources and SPI ranges
        irqchip/bcm2836: Make code more readable
        irqchip/bcm2836: Tolerate IRQs while no flag is set in ISR
        irqchip/bcm2836: Add SMP support for the 2836
        irqchip/bcm2836: Fix initialization of the LOCAL_IRQ_CNT timers
        irqchip/gic-v2m: acpi: Introducing GICv2m ACPI support
        irqchip/gic-v2m: Refactor to prepare for ACPI support
        irqdomain: Introduce is_fwnode_irqchip helper
        acpi: pci: Setup MSI domain for ACPI based pci devices
        genirq/msi: Export functions to allow MSI domains in modules
        irqchip/mbigen: Implement the mbigen irq chip operation functions
        irqchip/mbigen: Create irq domain for each mbigen device
        irqchip/mgigen: Add platform device driver for mbigen device
        dt-bindings: Documents the mbigen bindings
        ...
      3d116a66
    • Linus Torvalds's avatar
      Merge branches 'timers-core-for-linus' and 'timers-urgent-for-linus' of... · b4cee21e
      Linus Torvalds authored
      Merge branches 'timers-core-for-linus' and 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
      
      Pull timer updates - and a leftover fix - from Thomas Gleixner:
       "A rather large (commit wise) update from the timer side:
      
         - A bulk update to make compile tests work in the clocksource drivers
      
         - An overhaul of the h8300 timers
      
         - Some more Y2038 work
      
         - A few overflow prevention checks in the timekeeping/ntp code
      
         - The usual pile of fixes and improvements to the various
           clocksource/clockevent drivers and core code"
      
      Also:
       "A single fix for the posix-clock poll code which did not make it into
        4.4"
      
      * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (84 commits)
        clocksource/drivers/acpi_pm: Convert to pr_* macros
        clocksource: Make clocksource validation work for all clocksources
        timekeeping: Cap adjustments so they don't exceed the maxadj value
        ntp: Fix second_overflow's input parameter type to be 64bits
        ntp: Change time_reftime to time64_t and utilize 64bit __ktime_get_real_seconds
        timekeeping: Provide internal function __ktime_get_real_seconds
        clocksource/drivers/h8300: Use ioread / iowrite
        clocksource/drivers/h8300: Initializer cleanup.
        clocksource/drivers/h8300: Simplify delta handling
        clocksource/drivers/h8300: Fix timer not overflow case
        clocksource/drivers/h8300: Change to overflow interrupt
        clocksource/drivers/lpc32: Correct pr_err() output format
        clocksource/drivers/arm_global_timer: Fix suspend resume
        clocksource/drivers/pistachio: Fix wrong calculated clocksource read value
        clockevents/drivers/arm_global_timer: Use writel_relaxed in gt_compare_set
        clocksource/drivers/dw_apb_timer: Inline apbt_readl and apbt_writel
        clocksource/drivers/dw_apb_timer: Use {readl|writel}_relaxed in critical path
        clocksource/drivers/dw_apb_timer: Fix apbt_readl return types
        clocksource/drivers/tango-xtal: Replace code by clocksource_mmio_init
        clocksource/drivers/h8300: Increase the compilation test coverage
        ...
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        posix-clock: Fix return code on the poll method's error path
      b4cee21e
    • Linus Torvalds's avatar
      Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ae8a5218
      Linus Torvalds authored
      Pull x86 platform updates from Ingo Molnar:
       "Two changes:
      
         - one to quirk-save/restore certain system MSRs across
           suspend/resume, to make certain Intel systems work better
           (Chen Yu)
      
         - and also to constify a read only structure (Julia Lawall)"
      
      * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/platform/calgary: Constify cal_chipset_ops structures
        x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume
      ae8a5218
    • Linus Torvalds's avatar
      Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0ffedcda
      Linus Torvalds authored
      Pull x86 mm updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - make the debugfs 'kernel_page_tables' file read-only, as it only
           has read ops.  (Borislav Petkov)
      
         - micro-optimize clflush_cache_range() (Chris Wilson)
      
         - swiotlb enhancements, which fixes certain KVM emulated devices
           (Igor Mammedov)
      
         - fix an LDT related debug message (Jan Beulich)
      
         - modularize CONFIG_X86_PTDUMP (Kees Cook)
      
         - tone down an overly alarming warning (Laura Abbott)
      
         - Mark variable __initdata (Rasmus Villemoes)
      
         - PAT additions (Toshi Kani)"
      
      * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm: Micro-optimise clflush_cache_range()
        x86/mm/pat: Change free_memtype() to support shrinking case
        x86/mm/pat: Add untrack_pfn_moved for mremap
        x86/mm: Drop WARN from multi-BAR check
        x86/LDT: Print the real LDT base address
        x86/mm/64: Enable SWIOTLB if system has SRAT memory regions above MAX_DMA32_PFN
        x86/mm: Introduce max_possible_pfn
        x86/mm/ptdump: Make (debugfs)/kernel_page_tables read-only
        x86/mm/mtrr: Mark the 'range_new' static variable in mtrr_calc_range_state() as __initdata
        x86/mm: Turn CONFIG_X86_PTDUMP into a module
      0ffedcda
    • Linus Torvalds's avatar
      Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 6896d9f7
      Linus Torvalds authored
      Pull x86 fpu updates from Ingo Molnar:
       "This cleans up the FPU fault handling methods to be more robust, and
        moves eligible variables to .init.data"
      
      * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/fpu: Put a few variables in .init.data
        x86/fpu: Get rid of xstate_fault()
        x86/fpu: Add an XSTATE_OP() macro
      6896d9f7
    • Linus Torvalds's avatar
      Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 671d5532
      Linus Torvalds authored
      Pull x86 cpu updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - Improved CPU ID handling code and related enhancements (Borislav
           Petkov)
      
         - RDRAND fix (Len Brown)"
      
      * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86: Replace RDRAND forced-reseed with simple sanity check
        x86/MSR: Chop off lower 32-bit value
        x86/cpu: Fix MSR value truncation issue
        x86/cpu/amd, kvm: Satisfy guest kernel reads of IC_CFG MSR
        kvm: Add accessors for guest CPU's family, model, stepping
        x86/cpu: Unify CPU family, model, stepping calculation
      671d5532
    • Linus Torvalds's avatar
      Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 67c707e4
      Linus Torvalds authored
      Pull x86 cleanups from Ingo Molnar:
       "The main changes in this cycle were:
      
         - code patching and cpu_has cleanups (Borislav Petkov)
      
         - paravirt cleanups (Juergen Gross)
      
         - TSC cleanup (Thomas Gleixner)
      
         - ptrace cleanup (Chen Gang)"
      
      * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        arch/x86/kernel/ptrace.c: Remove unused arg_offs_table
        x86/mm: Align macro defines
        x86/cpu: Provide a config option to disable static_cpu_has
        x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros
        x86/cpufeature: Cleanup get_cpu_cap()
        x86/cpufeature: Move some of the scattered feature bits to x86_capability
        x86/paravirt: Remove paravirt ops pmd_update[_defer] and pte_update_defer
        x86/paravirt: Remove unused pv_apic_ops structure
        x86/tsc: Remove unused tsc_pre_init() hook
        x86: Remove unused function cpu_has_ht_siblings()
        x86/paravirt: Kill some unused patching functions
      67c707e4
    • Linus Torvalds's avatar
      Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 463eb8ac
      Linus Torvalds authored
      Pull small x86 boot update from Ingo Molnar:
       "A single update to the MAINTAINERS file"
      
      * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/tboot: Update maintainer list for Intel TXT
      463eb8ac
    • Linus Torvalds's avatar
      Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 88cbfd07
      Linus Torvalds authored
      Pull x86 asm updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - vDSO and asm entry improvements (Andy Lutomirski)
      
         - Xen paravirt entry enhancements (Boris Ostrovsky)
      
         - asm entry labels enhancement (Borislav Petkov)
      
         - and other misc changes (Thomas Gleixner, me)"
      
      * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/vsdo: Fix build on PARAVIRT_CLOCK=y, KVM_GUEST=n
        Revert "x86/kvm: On KVM re-enable (e.g. after suspend), update clocks"
        x86/entry/64_compat: Make labels local
        x86/platform/uv: Include clocksource.h for clocksource_touch_watchdog()
        x86/vdso: Enable vdso pvclock access on all vdso variants
        x86/vdso: Remove pvclock fixmap machinery
        x86/vdso: Get pvclock data from the vvar VMA instead of the fixmap
        x86, vdso, pvclock: Simplify and speed up the vdso pvclock reader
        x86/kvm: On KVM re-enable (e.g. after suspend), update clocks
        x86/entry/64: Bypass enter_from_user_mode on non-context-tracking boots
        x86/asm: Add asm macros for static keys/jump labels
        x86/asm: Error out if asm/jump_label.h is included inappropriately
        context_tracking: Switch to new static_branch API
        x86/entry, x86/paravirt: Remove the unused usergs_sysret32 PV op
        x86/paravirt: Remove the unused irq_enable_sysexit pv op
        x86/xen: Avoid fast syscall path for Xen PV guests
      88cbfd07
    • Linus Torvalds's avatar
      Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4f19b880
      Linus Torvalds authored
      Pull x86 apic updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - introduce optimized single IPI sending methods on modern APICs
           (Linus Torvalds, Thomas Gleixner)
      
         - kexec/crash APIC handling fixes and enhancements (Hidehiro Kawai)
      
         - extend lapic vector saving/restoring to the CMCI (MCE) vector as
           well (Juergen Gross)
      
         - various fixes and enhancements (Jake Oshins, Len Brown)"
      
      * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
        x86/irq: Export functions to allow MSI domains in modules
        Documentation: Document kernel.panic_on_io_nmi sysctl
        x86/nmi: Save regs in crash dump on external NMI
        x86/apic: Introduce apic_extnmi command line parameter
        kexec: Fix race between panic() and crash_kexec()
        panic, x86: Allow CPUs to save registers even if looping in NMI context
        panic, x86: Fix re-entrance problem due to panic on NMI
        x86/apic: Fix the saving and restoring of lapic vectors during suspend/resume
        x86/smpboot: Re-enable init_udelay=0 by default on modern CPUs
        x86/smp: Remove single IPI wrapper
        x86/apic: Use default send single IPI wrapper
        x86/apic: Provide default send single IPI wrapper
        x86/apic: Implement single IPI for apic_noop
        x86/apic: Wire up single IPI for apic_numachip
        x86/apic: Wire up single IPI for x2apic_uv
        x86/apic: Implement single IPI for x2apic_phys
        x86/apic: Wire up single IPI for bigsmp_apic
        x86/apic: Remove pointless indirections from bigsmp_apic
        x86/apic: Wire up single IPI for apic_physflat
        x86/apic: Remove pointless indirections from apic_physflat
        ...
      4f19b880
    • Linus Torvalds's avatar
      Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · af345201
      Linus Torvalds authored
      Pull scheduler updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - tickless load average calculation enhancements (Byungchul Park)
      
         - vtime handling enhancements (Frederic Weisbecker)
      
         - scalability improvement via properly aligning a key structure field
           (Jiri Olsa)
      
         - various stop_machine() fixes (Oleg Nesterov)
      
         - sched/numa enhancement (Rik van Riel)
      
         - various fixes and improvements (Andi Kleen, Dietmar Eggemann,
           Geliang Tang, Hiroshi Shimamoto, Joonwoo Park, Peter Zijlstra,
           Waiman Long, Wanpeng Li, Yuyang Du)"
      
      * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
        sched/fair: Fix new task's load avg removed from source CPU in wake_up_new_task()
        sched/core: Move sched_entity::avg into separate cache line
        x86/fpu: Properly align size in CHECK_MEMBER_AT_END_OF() macro
        sched/deadline: Fix the earliest_dl.next logic
        sched/fair: Disable the task group load_avg update for the root_task_group
        sched/fair: Move the cache-hot 'load_avg' variable into its own cacheline
        sched/fair: Avoid redundant idle_cpu() call in update_sg_lb_stats()
        sched/core: Move the sched_to_prio[] arrays out of line
        sched/cputime: Convert vtime_seqlock to seqcount
        sched/cputime: Introduce vtime accounting check for readers
        sched/cputime: Rename vtime_accounting_enabled() to vtime_accounting_cpu_enabled()
        sched/cputime: Correctly handle task guest time on housekeepers
        sched/cputime: Clarify vtime symbols and document them
        sched/cputime: Remove extra cost in task_cputime()
        sched/fair: Make it possible to account fair load avg consistently
        sched/fair: Modify the comment about lock assumptions in migrate_task_rq_fair()
        stop_machine: Clean up the usage of the preemption counter in cpu_stopper_thread()
        stop_machine: Shift the 'done != NULL' check from cpu_stop_signal_done() to callers
        stop_machine: Kill cpu_stop_done->executed
        stop_machine: Change __stop_cpus() to rely on cpu_stop_queue_work()
        ...
      af345201
    • Linus Torvalds's avatar
      Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4bd20db2
      Linus Torvalds authored
      Pull RAS updates from Ingo Molnar:
       "Various x86 MCE fixes and small enhancements"
      
      * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mce: Make usable address checks Intel-only
        x86/mce: Add the missing memory error check on AMD
        x86/RAS: Remove mce.usable_addr
        x86/mce: Do not enter deferred errors into the generic pool twice
      4bd20db2
    • Linus Torvalds's avatar
      Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5cb52b5e
      Linus Torvalds authored
      Pull perf updates from Ingo Molnar:
       "Kernel side changes:
      
         - Intel Knights Landing support.  (Harish Chegondi)
      
         - Intel Broadwell-EP uncore PMU support.  (Kan Liang)
      
         - Core code improvements.  (Peter Zijlstra.)
      
         - Event filter, LBR and PEBS fixes.  (Stephane Eranian)
      
         - Enable cycles:pp on Intel Atom.  (Stephane Eranian)
      
         - Add cycles:ppp support for Skylake.  (Andi Kleen)
      
         - Various x86 NMI overhead optimizations.  (Andi Kleen)
      
         - Intel PT enhancements.  (Takao Indoh)
      
         - AMD cache events fix.  (Vince Weaver)
      
        Tons of tooling changes:
      
         - Show random perf tool tips in the 'perf report' bottom line
           (Namhyung Kim)
      
         - perf report now defaults to --group if the perf.data file has
           grouped events, try it with:
      
            # perf record -e '{cycles,instructions}' -a sleep 1
            [ perf record: Woken up 1 times to write data ]
            [ perf record: Captured and wrote 1.093 MB perf.data (1247 samples) ]
            # perf report
            # Samples: 1K of event 'anon group { cycles, instructions }'
            # Event count (approx.): 1955219195
            #
            #       Overhead  Command     Shared Object      Symbol
      
               2.86%   0.22%  swapper     [kernel.kallsyms]  [k] intel_idle
               1.05%   0.33%  firefox     libxul.so          [.] js::SetObjectElement
               1.05%   0.00%  kworker/0:3 [kernel.kallsyms]  [k] gen6_ring_get_seqno
               0.88%   0.17%  chrome      chrome             [.] 0x0000000000ee27ab
               0.65%   0.86%  firefox     libxul.so          [.] js::ValueToId<(js::AllowGC)1>
               0.64%   0.23%  JS Helper   libxul.so          [.] js::SplayTree<js::jit::LiveRange*, js::jit::LiveRange>::splay
               0.62%   1.27%  firefox     libxul.so          [.] js::GetIterator
               0.61%   1.74%  firefox     libxul.so          [.] js::NativeSetProperty
               0.61%   0.31%  firefox     libxul.so          [.] js::SetPropertyByDefining
      
         - Introduce the 'perf stat record/report' workflow:
      
           Generate perf.data files from 'perf stat', to tap into the
           scripting capabilities perf has instead of defining a 'perf stat'
           specific scripting support to calculate event ratios, etc.
      
           Simple example:
      
              $ perf stat record -e cycles usleep 1
      
               Performance counter stats for 'usleep 1':
      
                     1,134,996      cycles
      
                   0.000670644 seconds time elapsed
      
              $ perf stat report
      
               Performance counter stats for '/home/acme/bin/perf stat record -e cycles usleep 1':
      
                     1,134,996      cycles
      
                   0.000670644 seconds time elapsed
      
              $
      
           It generates PERF_RECORD_ userspace records to store the details:
      
              $ perf report -D | grep PERF_RECORD
              0xf0 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 27637
              0x118 [0x12]: PERF_RECORD_CPU_MAP nr: 1 cpu: 65535
              0x12a [0x40]: PERF_RECORD_STAT_CONFIG
              0x16a [0x30]: PERF_RECORD_STAT
              -1 -1 0x19a [0x40]: PERF_RECORD_MMAP -1/0: [0xffffffff81000000(0x1f000000) @ 0xffffffff81000000]: x [kernel.kallsyms]_text
              0x1da [0x18]: PERF_RECORD_STAT_ROUND
              [acme@ssdandy linux]$
      
           An effort was made to make perf.data files generated like this to
           not generate cryptic messages when processed by older tools.
      
           The 'perf script' bits need rebasing, will go up later.
      
         - Make command line options always available, even when they depend
           on some feature being enabled, warning the user about use of such
           options (Wang Nan)
      
         - Support hw breakpoint events (mem:0xAddress) in the default output
           mode in 'perf script' (Wang Nan)
      
         - Fixes and improvements for supporting annotating ARM binaries,
           support ARM call and jump instructions, more work needed to have
           arch specific stuff separated into tools/perf/arch/*/annotate/
           (Russell King)
      
         - Add initial 'perf config' command, for now just with a --list
           command to the contents of the configuration file in use and a
           basic man page describing its format, commands for doing edits and
           detailed documentation are being reviewed and proof-read.  (Taeung
           Song)
      
         - Allows BPF scriptlets specify arguments to be fetched using DWARF
           info, using a prologue generated at compile/build time (He Kuang,
           Wang Nan)
      
         - Allow attaching BPF scriptlets to module symbols (Wang Nan)
      
         - Allow attaching BPF scriptlets to userspace code using uprobe (Wang
           Nan)
      
         - BPF programs now can specify 'perf probe' tunables via its section
           name, separating key=val values using semicolons (Wang Nan)
      
           Testing some of these new BPF features:
      
              Use case: get callchains when receiving SSL packets, filter then in the
                        kernel, at arbitrary place.
      
              # cat ssl.bpf.c
              #define SEC(NAME) __attribute__((section(NAME), used))
      
              struct pt_regs;
      
              SEC("func=__inet_lookup_established hnum")
              int func(struct pt_regs *ctx, int err, unsigned short port)
              {
                      return err == 0 && port == 443;
              }
      
              char _license[] SEC("license") = "GPL";
              int  _version   SEC("version") = LINUX_VERSION_CODE;
              #
              # perf record -a -g -e ssl.bpf.c
              ^C[ perf record: Woken up 1 times to write data ]
              [ perf record: Captured and wrote 0.787 MB perf.data (3 samples) ]
              # perf script | head -30
              swapper     0 [000] 58783.268118: perf_bpf_probe:func: (ffffffff816a0f60) hnum=0x1bb
                 8a0f61 __inet_lookup_established (/lib/modules/4.3.0+/build/vmlinux)
                 896def ip_rcv_finish (/lib/modules/4.3.0+/build/vmlinux)
                 8976c2 ip_rcv (/lib/modules/4.3.0+/build/vmlinux)
                 855eba __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux)
                 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux)
                 8572a8 process_backlog (/lib/modules/4.3.0+/build/vmlinux)
                 856b11 net_rx_action (/lib/modules/4.3.0+/build/vmlinux)
                 2a284b __do_softirq (/lib/modules/4.3.0+/build/vmlinux)
                 2a2ba3 irq_exit (/lib/modules/4.3.0+/build/vmlinux)
                 96b7a4 do_IRQ (/lib/modules/4.3.0+/build/vmlinux)
                 969807 ret_from_intr (/lib/modules/4.3.0+/build/vmlinux)
                 2dede5 cpu_startup_entry (/lib/modules/4.3.0+/build/vmlinux)
                 95d5bc rest_init (/lib/modules/4.3.0+/build/vmlinux)
                1163ffa start_kernel ([kernel.vmlinux].init.text)
                11634d7 x86_64_start_reservations ([kernel.vmlinux].init.text)
                1163623 x86_64_start_kernel ([kernel.vmlinux].init.text)
      
              qemu-system-x86  9178 [003] 58785.792417: perf_bpf_probe:func: (ffffffff816a0f60) hnum=0x1bb
                 8a0f61 __inet_lookup_established (/lib/modules/4.3.0+/build/vmlinux)
                 896def ip_rcv_finish (/lib/modules/4.3.0+/build/vmlinux)
                 8976c2 ip_rcv (/lib/modules/4.3.0+/build/vmlinux)
                 855eba __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux)
                 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux)
                 856660 netif_receive_skb_internal (/lib/modules/4.3.0+/build/vmlinux)
                 8566ec netif_receive_skb_sk (/lib/modules/4.3.0+/build/vmlinux)
                   430a br_handle_frame_finish ([bridge])
                   48bc br_handle_frame ([bridge])
                 855f44 __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux)
                 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux)
              #
      
         - Use 'perf probe' various options to list functions, see what
           variables can be collected at any given point, experiment first
           collecting without a filter, then filter, use it together with
           'perf trace', 'perf top', with or without callchains, if it
           explodes, please tell us!
      
         - Introduce a new callchain mode: "folded", that will list per line
           representations of all callchains for a give histogram entry,
           facilitating 'perf report' output processing by other tools, such
           as Brendan Gregg's flamegraph tools (Namhyung Kim)
      
           E.g:
      
              # perf report | grep -v ^# | head
                 18.37%     0.00%  swapper  [kernel.kallsyms]   [k] cpu_startup_entry
                                 |
                                 ---cpu_startup_entry
                                    |
                                    |--12.07%--start_secondary
                                    |
                                     --6.30%--rest_init
                                               start_kernel
                                               x86_64_start_reservations
                                               x86_64_start_kernel
               #
      
           Becomes, in "folded" mode:
      
              # perf report -g folded | grep -v ^# | head -5
                  18.37%     0.00%  swapper [kernel.kallsyms]   [k] cpu_startup_entry
                12.07% cpu_startup_entry;start_secondary
                 6.30% cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel
                  16.90%     0.00%  swapper [kernel.kallsyms]   [k] call_cpuidle
                11.23% call_cpuidle;cpu_startup_entry;start_secondary
                 5.67% call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel
                  16.90%     0.00%  swapper [kernel.kallsyms]   [k] cpuidle_enter
                11.23% cpuidle_enter;call_cpuidle;cpu_startup_entry;start_secondary
                 5.67% cpuidle_enter;call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel
                  15.12%     0.00%  swapper [kernel.kallsyms]   [k] cpuidle_enter_state
               #
      
           The user can also select one of "count", "period" or "percent" as
           the first column.
      
        ... and lots of infrastructure enhancements, plus fixes and other
        changes, features I failed to list - see the shortlog and the git log
        for details"
      
      * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (271 commits)
        perf evlist: Add --trace-fields option to show trace fields
        perf record: Store data mmaps for dwarf unwind
        perf libdw: Check for mmaps also in MAP__VARIABLE tree
        perf unwind: Check for mmaps also in MAP__VARIABLE tree
        perf unwind: Use find_map function in access_dso_mem
        perf evlist: Remove perf_evlist__(enable|disable)_event functions
        perf evlist: Make perf_evlist__open() open evsels with their cpus and threads (like perf record does)
        perf report: Show random usage tip on the help line
        perf hists: Export a couple of hist functions
        perf diff: Use perf_hpp__register_sort_field interface
        perf tools: Add overhead/overhead_children keys defaults via string
        perf tools: Remove list entry from struct sort_entry
        perf tools: Include all tools/lib directory for tags/cscope/TAGS targets
        perf script: Align event name properly
        perf tools: Add missing headers in perf's MANIFEST
        perf tools: Do not show trace command if it's not compiled in
        perf report: Change default to use event group view
        perf top: Decay periods in callchains
        tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/
        tools lib: Sync tools/lib/find_bit.c with the kernel
        ...
      5cb52b5e
    • Linus Torvalds's avatar
      Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 24af98c4
      Linus Torvalds authored
      Pull locking updates from Ingo Molnar:
       "So we have a laundry list of locking subsystem changes:
      
         - continuing barrier API and code improvements
      
         - futex enhancements
      
         - atomics API improvements
      
         - pvqspinlock enhancements: in particular lock stealing and adaptive
           spinning
      
         - qspinlock micro-enhancements"
      
      * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op
        futex: Cleanup the goto confusion in requeue_pi()
        futex: Remove pointless put_pi_state calls in requeue()
        futex: Document pi_state refcounting in requeue code
        futex: Rename free_pi_state() to put_pi_state()
        futex: Drop refcount if requeue_pi() acquired the rtmutex
        locking/barriers, arch: Remove ambiguous statement in the smp_store_mb() documentation
        lcoking/barriers, arch: Use smp barriers in smp_store_release()
        locking/cmpxchg, arch: Remove tas() definitions
        locking/pvqspinlock: Queue node adaptive spinning
        locking/pvqspinlock: Allow limited lock stealing
        locking/pvqspinlock: Collect slowpath lock statistics
        sched/core, locking: Document Program-Order guarantees
        locking, sched: Introduce smp_cond_acquire() and use it
        locking/pvqspinlock, x86: Optimize the PV unlock code path
        locking/qspinlock: Avoid redundant read of next pointer
        locking/qspinlock: Prefetch the next node cacheline
        locking/qspinlock: Use _acquire/_release() versions of cmpxchg() & xchg()
        atomics: Add test for atomic operations with _relaxed variants
      24af98c4
    • Linus Torvalds's avatar
      Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 9061cbe6
      Linus Torvalds authored
      Pull RCU updates from Ingo Molnar:
       "The changes in this cycle were:
      
         - Adding transitivity uniformly to rcu_node structure ->lock
           acquisitions.  (This is implemented by the first two commits on top
           of v4.4-rc2 due to the pervasive nature of this change.)
      
         - Documentation updates, including RCU requirements.
      
         - Expedited grace-period changes.
      
         - Miscellaneous fixes.
      
         - Linked-list fixes, courtesy of KTSAN.
      
         - Torture-test updates.
      
         - Late-breaking fix to sysrq-generated crash.
      
        One thing I should note is that these pieces of documentation are
        fairly large files:
      
          .../RCU/Design/Requirements/Requirements.html      | 2897 ++++++++++++++++++++
          .../RCU/Design/Requirements/Requirements.htmlx     | 2741 ++++++++++++++++++
      
        and are written in HTML, not the usual .txt style.  I hope they are
        fine"
      
      Paul McKenney explains the html docs:
       "For whatever it is worth, the reason for this unconventional choice
        was that attempts to do the diagrams in ASCII art failed miserably.
      
        And attempts to do ASCII art for the upcoming documentation of the
        data structures failed even more miserably"
      
      * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (49 commits)
        sysrq: Fix warning in sysrq generated crash.
        list: Add lockless list traversal primitives
        rcu: Make rcu_gp_init() be bool rather than int
        rcu: Move wakeup out from under rnp->lock
        rcu: Fix comment for rcu_dereference_raw_notrace
        rcu: Don't redundantly disable irqs in rcu_irq_{enter,exit}()
        rcu: Make cpu_needs_another_gp() be bool
        rcu: Eliminate unused rcu_init_one() argument
        rcu: Remove TINY_RCU bloat from pointless boot parameters
        torture: Place console.log files correctly from the get-go
        torture: Abbreviate console error dump
        rcutorture: Print symbolic name for ->gp_state
        rcutorture: Print symbolic name for rcu_torture_writer_state
        rcutorture: Remove CONFIG_RCU_USER_QS from rcutorture selftest doc
        rcutorture: Default grace period to three minutes, allow override
        rcutorture:  Dump stack when GP kthread stalls
        rcutorture: Flag nonexistent RCU GP kthread
        rcutorture: Add batch number to script printout
        Documentation/memory-barriers.txt: Fix ACCESS_ONCE thinko
        documentation: Update RCU requirements based on expedited changes
        ...
      9061cbe6
    • Linus Torvalds's avatar
      Merge branch 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · ddf1d623
      Linus Torvalds authored
      Pull vfs xattr updates from Al Viro:
       "Andreas' xattr cleanup series.
      
        It's a followup to his xattr work that went in last cycle; -0.5KLoC"
      
      * 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        xattr handlers: Simplify list operation
        ocfs2: Replace list xattr handler operations
        nfs: Move call to security_inode_listsecurity into nfs_listxattr
        xfs: Change how listxattr generates synthetic attributes
        tmpfs: listxattr should include POSIX ACL xattrs
        tmpfs: Use xattr handler infrastructure
        btrfs: Use xattr handler infrastructure
        vfs: Distinguish between full xattr names and proper prefixes
        posix acls: Remove duplicate xattr name definitions
        gfs2: Remove gfs2_xattr_acl_chmod
        vfs: Remove vfs_xattr_cmp
      ddf1d623
    • Linus Torvalds's avatar
      Merge branch 'work.symlinks' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 32fb3784
      Linus Torvalds authored
      Pull vfs RCU symlink updates from Al Viro:
       "Replacement of ->follow_link/->put_link, allowing to stay in RCU mode
        even if the symlink is not an embedded one.
      
        No changes since the mailbomb on Jan 1"
      
      * 'work.symlinks' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        switch ->get_link() to delayed_call, kill ->put_link()
        kill free_page_put_link()
        teach nfs_get_link() to work in RCU mode
        teach proc_self_get_link()/proc_thread_self_get_link() to work in RCU mode
        teach shmem_get_link() to work in RCU mode
        teach page_get_link() to work in RCU mode
        replace ->follow_link() with new method that could stay in RCU mode
        don't put symlink bodies in pagecache into highmem
        namei: page_getlink() and page_follow_link_light() are the same thing
        ufs: get rid of ->setattr() for symlinks
        udf: don't duplicate page_symlink_inode_operations
        logfs: don't duplicate page_symlink_inode_operations
        switch befs long symlinks to page_symlink_operations
      32fb3784
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 19ccb28e
      Linus Torvalds authored
      Pull vfs compat_ioctl fixes from Al Viro:
       "This is basically Jann's patches from last week.  I have _not_
        included the stuff like switching i2c to ->compat_ioctl() into this
        one - those need more testing.
      
        Ideally I would like fs/compat_ioctl.c shrunk a lot, but that's a
        separate story"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        compat_ioctl: don't call do_ioctl under set_fs(KERNEL_DS)
        compat_ioctl: don't pass fd around when not needed
        compat_ioctl: don't look up the fd twice
      19ccb28e
  2. 10 Jan, 2016 1 commit
  3. 09 Jan, 2016 5 commits
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · eac6f76a
      Linus Torvalds authored
      Pull SCSI fix from James Bottomley:
       "A single fix for machines with pages > 4k (PPC mostly).
      
        There's a bug in our optimal transfer size code where we don't account
        for pages > 4k and can set the transfer size to be less than the page
        size causing nasty failures"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        sd: Reject optimal transfer length smaller than page size
      eac6f76a
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.4-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · c0cb1393
      Linus Torvalds authored
      Pull PCI fixlet from Bjorn Helgaas:
       "This marks the TI DRA7xx host bridge driver as broken.  Apparently it
        has never worked without some additional out-of-tree code, so I'm
        going to mark it broken now and remove it completely next cycle unless
        it's fixed"
      
      * tag 'pci-v4.4-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        PCI: dra7xx: Mark driver as broken
      c0cb1393
    • Ingo Molnar's avatar
      Merge tag 'perf-core-for-mingo' of... · 3eb9ede2
      Ingo Molnar authored
      Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
      
       into perf/core
      
      Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
      
      New features:
      
      - Allow using trace events fields as sort order keys, making 'perf evlist --trace_fields'
        show those, and then the user can select a subset and use like:
      
          perf top -e sched:sched_switch -s prev_comm,next_comm
      
        That works as well in 'perf report' when handling files containing
        tracepoints.
      
        The default when just tracepoint events are found in a perf.data file is to
        format it like ftrace, using the libtraceevent formatters, plugins, etc (Namhyung Kim)
      
      - Add support in 'perf script' to process 'perf stat record' generated files,
        culminating in a python perf script that calculates CPI (Cycles per
        Instruction) (Jiri Olsa)
      
      - Show random perf tool tips in the 'perf report' bottom line (Namhyung Kim)
      
      - perf report now defaults to --group if the perf.data file has grouped events, try it with:
      
        # perf record -e '{cycles,instructions}' -a sleep 1
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 1.093 MB perf.data (1247 samples) ]
        # perf report
        # Samples: 1K of event 'anon group { cycles, instructions }'
        # Event count (approx.): 1955219195
        #
        #       Overhead  Command     Shared Object      Symbol
      
           2.86%   0.22%  swapper     [kernel.kallsyms]  [k] intel_idle
           1.05%   0.33%  firefox     libxul.so          [.] js::SetObjectElement
           1.05%   0.00%  kworker/0:3 [kernel.kallsyms]  [k] gen6_ring_get_seqno
           0.88%   0.17%  chrome      chrome             [.] 0x0000000000ee27ab
           0.65%   0.86%  firefox     libxul.so          [.] js::ValueToId<(js::AllowGC)1>
           0.64%   0.23%  JS Helper   libxul.so          [.] js::SplayTree<js::jit::LiveRange*, js::jit::LiveRange>::splay
           0.62%   1.27%  firefox     libxul.so          [.] js::GetIterator
           0.61%   1.74%  firefox     libxul.so          [.] js::NativeSetProperty
           0.61%   0.31%  firefox     libxul.so          [.] js::SetPropertyByDefining
      
      User visible fixes:
      
      - Coect data mmaps so that the DWARF unwinder can handle usecases needing them,
        like softice (Jiri Olsa)
      
      - Decay callchains in fractal mode, fixing up cases where 'perf top -g' would
        show entries with more than 100% (Namhyung Kim)
      
      Infrastructure changes:
      
      - Sync tools/lib with the lib/ in the kernel sources for find_bit.c and
        move bitmap.[ch] from tools/perf/util/ to tools/lib/ (Arnaldo Carvalho de Melo)
      
      - No need to set attr.sample_freq in some 'perf test' entries that only
        want to deal with PERF_RECORD_ meta-events, improve a bit error output
        for CQM test (Arnaldo Carvalho de Melo)
      
      - Fix python binding build, adding some missing object files now required
        due to cpumap using find_bit stuff (Arnaldo Carvalho de Melo)
      
      - tools/build improvemnts (Jiri Olsa)
      
      - Add more files to cscope/ctags databases (Jiri Olsa)
      
      - Do not show 'trace' in 'perf help' if it is not compiled in (Jiri Olsa)
      
      - Make perf_evlist__open() open evsels with their cpus and threads,
        like perf record does, making them consistent (Adrian Hunter)
      
      - Fix pmu snapshot initialization bug (Stephane Eranian)
      
      - Add missing headers in perf's MANIFEST (Wang Nan)
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      3eb9ede2
    • Guenter Roeck's avatar
      hwmon: (nct6683) Add basic support for NCT6683 on Mitac boards · 91918d13
      Guenter Roeck authored
      
      
      Mitac microcode differs from Intel microcode. One key difference
      is that pwm values can be written.
      
      Detect vendor from customer ID field and no longer use DMI data
      to identify which microcode is running on the chip.
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      91918d13
    • Michal Hocko's avatar
      vmstat: allocate vmstat_wq before it is used · 751e5f5c
      Michal Hocko authored
      kernel test robot has reported the following crash:
      
        BUG: unable to handle kernel NULL pointer dereference at 00000100
        IP: [<c1074df6>] __queue_work+0x26/0x390
        *pdpt = 0000000000000000 *pde = f000ff53f000ff53 *pde = f000ff53f000ff53
        Oops: 0000 [#1] PREEMPT PREEMPT SMP SMP
        CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.4.0-rc4-00139-g373ccbe5 #1
        Workqueue: events vmstat_shepherd
        task: cb684600 ti: cb7ba000 task.ti: cb7ba000
        EIP: 0060:[<c1074df6>] EFLAGS: 00010046 CPU: 0
        EIP is at __queue_work+0x26/0x390
        EAX: 00000046 EBX: cbb37800 ECX: cbb37800 EDX: 00000000
        ESI: 00000000 EDI: 00000000 EBP: cb7bbe68 ESP: cb7bbe38
         DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
        CR0: 8005003b CR2: 00000100 CR3: 01fd5000 CR4: 000006b0
        Stack:
        Call Trace:
          __queue_delayed_work+0xa1/0x160
          queue_delayed_work_on+0x36/0x60
          vmstat_shepherd+0xad/0xf0
          process_one_work+0x1aa/0x4c0
          worker_thread+0x41/0x440
          kthread+0xb0/0xd0
          ret_from_kernel_thread+0x21/0x40
      
      The reason is that start_shepherd_timer schedules the shepherd work item
      which uses vmstat_wq (vmstat_shepherd) before setup_vmstat allocates
      that workqueue so if the further initialization takes more than HZ we
      might end up scheduling on a NULL vmstat_wq.  This is really unlikely
      but not impossible.
      
      Fixes: 373ccbe5
      
       ("mm, vmstat: allow WQ concurrency to discover memory reclaim doesn't make any progress")
      Reported-by: default avatarkernel test robot <ying.huang@linux.intel.com>
      Signed-off-by: default avatarMichal Hocko <mhocko@suse.com>
      Tested-by: default avatarTetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
      Cc: stable@vger.kernel.org
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      751e5f5c
  4. 08 Jan, 2016 7 commits
    • Jann Horn's avatar
      compat_ioctl: don't call do_ioctl under set_fs(KERNEL_DS) · a7f61e89
      Jann Horn authored
      
      
      This replaces all code in fs/compat_ioctl.c that translated
      ioctl arguments into a in-kernel structure, then performed
      do_ioctl under set_fs(KERNEL_DS), with code that allocates
      data on the user stack and can call the VFS ioctl handler
      under USER_DS.
      
      This is done as a hardening measure because the caller
      does not know what kind of ioctl handler will be invoked,
      only that no corresponding compat_ioctl handler exists and
      what the ioctl command number is. The accidental
      invocation of an unlocked_ioctl handler that unexpectedly
      calls copy_to_user could be a severe security issue.
      Signed-off-by: default avatarJann Horn <jann@thejh.net>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      a7f61e89
    • Al Viro's avatar
      66cf191f
    • Jann Horn's avatar
      compat_ioctl: don't look up the fd twice · b4341721
      Jann Horn authored
      
      
      In code in fs/compat_ioctl.c that translates ioctl arguments
      into a in-kernel structure, then performs sys_ioctl, possibly
      under set_fs(KERNEL_DS), this commit changes the sys_ioctl
      calls to do_ioctl calls. do_ioctl is a new function that does
      the same thing as sys_ioctl, but doesn't look up the fd again.
      
      This change is made to avoid (potential) security issues
      because of ioctl handlers that accept one of the ioctl
      commands I2C_FUNCS, VIDEO_GET_EVENT, MTIOCPOS, MTIOCGET,
      TIOCGSERIAL, TIOCSSERIAL, RTC_IRQP_READ, RTC_EPOCH_READ.
      This can happen for multiple reasons:
      
       - The ioctl command number could be reused.
       - The ioctl handler might not check the full ioctl
         command. This is e.g. true for drm_ioctl.
       - The ioctl handler is very special, e.g. cuse_file_ioctl
      
      The real issue is that set_fs(KERNEL_DS) is used here,
      but that's fixed in a separate commit
      "compat_ioctl: don't call do_ioctl under set_fs(KERNEL_DS)".
      
      This change mitigates potential security issues by
      preventing a race that permits invocation of
      unlocked_ioctl handlers under KERNEL_DS through compat
      code even if a corresponding compat_ioctl handler exists.
      
      So far, no way has been identified to use this to damage
      kernel memory without having CAP_SYS_ADMIN in the init ns
      (with the capability, doing reads/writes at arbitrary
      kernel addresses should be easy through CUSE's ioctl
      handler with FUSE_IOCTL_UNRESTRICTED set).
      
      [AV: two missed sys_ioctl() taken care of]
      Signed-off-by: default avatarJann Horn <jann@thejh.net>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      b4341721
    • Linus Torvalds's avatar
      Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 44d8a7d5
      Linus Torvalds authored
      Pull ARM SoC fixes from Arnd Bergmann:
       "This is the final small set of ARM SoC bug fixes for linux-4.4, almost
        all regressions:
      
        OMAP:
         - data corruption on the Nokia N900 flash
      
        Allwinner:
         - Two defconfig change to get USB working again
      
        ARM Versatile:
         - Interrupt numbers gone bad after an older bug fix
      
        Nomadik:
         - Crashes from incorrect L2 cache settings
      
        VIA vt8500:
         - SD/MMC support on WM8650 never worked"
      
      * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        dts: vt8500: Add SDHC node to DTS file for WM8650
        ARM: Fix broken USB support in multi_v7_defconfig for sunxi devices
        ARM: versatile: fix MMC/SD interrupt assignment
        ARM: nomadik: set latencies to 8 cycles
        ARM: OMAP2+: Fix onenand rate detection to avoid filesystem corruption
        ARM: Fix broken USB support in sunxi_defconfig
      44d8a7d5
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 516c50cd
      Linus Torvalds authored
      Pull KVM fix from Paolo Bonzini:
       "A simple fix.  I'm sending it before the merge window, because it
        refines a patch found in your master branch but not yet in the
        kvm/next branch that is destined for 4.5"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        kvm: x86: only channel 0 of the i8254 is linked to the HPET
      516c50cd
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 496b0b57
      Linus Torvalds authored
      Pull ACPI fix from Rafael Wysocki:
       "Just one obvious fix that adds a missing function argument in ACPI
        code introduced recently (Kees Cook)"
      
      * tag 'pm+acpi-4.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / property: avoid leaking format string into kobject name
      496b0b57
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 650e5455
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "A handful of x86 fixes:
      
         - a syscall ABI fix, fixing an Android breakage
         - a Xen PV guest fix relating to the RTC device, causing a
           non-working console
         - a Xen guest syscall stack frame fix
         - an MCE hotplug CPU crash fix"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/numachip: Fix NumaConnect2 MMCFG PCI access
        x86/entry: Restore traditional SYSENTER calling convention
        x86/entry: Fix some comments
        x86/paravirt: Prevent rtc_cmos platform device init on PV guests
        x86/xen: Avoid fast syscall path for Xen PV guests
        x86/mce: Ensure offline CPUs don't participate in rendezvous process
      650e5455