1. 17 Apr, 2018 2 commits
    • Petr Mladek's avatar
      livepatch: Allow to call a custom callback when freeing shadow variables · 3b2c77d0
      Petr Mladek authored
      We might need to do some actions before the shadow variable is freed.
      For example, we might need to remove it from a list or free some data
      that it points to.
      
      This is already possible now. The user can get the shadow variable
      by klp_shadow_get(), do the necessary actions, and then call
      klp_shadow_free().
      
      This patch allows to do it a more elegant way. The user could implement
      the needed actions in a callback that is passed to klp_shadow_free()
      as a parameter. The callback usually does reverse operations to
      the constructor callback that can be called by klp_shadow_*alloc().
      
      It is especially useful for klp_shadow_free_all(). There we need to do
      these extra actions for each found shadow variable with the given ID.
      
      Note that the memory used by the shadow variable itself is still released
      later by rcu callback. It is needed to protect internal structures that
      keep all shadow variables. But the destructor is called immediately.
      The shadow variable must not be access anyway after klp_shadow_free()
      is called. The user is responsible to protect this any suitable way.
      
      Be aware that the destructor is called under klp_shadow_lock. It is
      the same as for the contructor in klp_shadow_alloc().
      Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
      Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Acked-by: default avatarMiroslav Benes <mbenes@suse.cz>
      Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      3b2c77d0
    • Petr Mladek's avatar
      livepatch: Initialize shadow variables safely by a custom callback · e91c2518
      Petr Mladek authored
      The existing API allows to pass a sample data to initialize the shadow
      data. It works well when the data are position independent. But it fails
      miserably when we need to set a pointer to the shadow structure itself.
      
      Unfortunately, we might need to initialize the pointer surprisingly
      often because of struct list_head. It is even worse because the list
      might be hidden in other common structures, for example, struct mutex,
      struct wait_queue_head.
      
      For example, this was needed to fix races in ALSA sequencer. It required
      to add mutex into struct snd_seq_client. See commit b3defb79
      ("ALSA: seq: Make ioctls race-free") and commit d15d662e
      ("ALSA: seq: Fix racy pool initializations")
      
      This patch makes the API more safe. A custom constructor function and data
      are passed to klp_shadow_*alloc() functions instead of the sample data.
      
      Note that ctor_data are no longer a template for shadow->data. It might
      point to any data that might be necessary when the constructor is called.
      
      Also note that the constructor is called under klp_shadow_lock. It is
      an internal spin_lock that synchronizes alloc() vs. get() operations,
      see klp_shadow_get_or_alloc(). On one hand, this adds a risk of ABBA
      deadlocks. On the other hand, it allows to do some operations safely.
      For example, we could add the new structure into an existing list.
      This must be done only once when the structure is allocated.
      Reported-by: default avatarNicolai Stange <nstange@suse.de>
      Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
      Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Acked-by: default avatarMiroslav Benes <mbenes@suse.cz>
      Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      e91c2518
  2. 31 Jan, 2018 38 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching · e1c70f32
      Linus Torvalds authored
      Pull livepatching updates from Jiri Kosina:
      
       - handle 'infinitely'-long sleeping tasks, from Miroslav Benes
      
       - remove 'immediate' feature, as it turns out it doesn't provide the
         originally expected semantics, and brings more issues than value
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
        livepatch: add locking to force and signal functions
        livepatch: Remove immediate feature
        livepatch: force transition to finish
        livepatch: send a fake signal to all blocking tasks
      e1c70f32
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid · 183b6366
      Linus Torvalds authored
      Pull HID updates from Jiri Kosina:
      
       - remove hid_have_special_driver[] entry hard requirement for any newly
         supported VID/PID by a specific non-core hid driver, and general
         related cleanup of HID matching core, from Benjamin Tissoires
      
       - support for new Wacom devices and a few small fixups for already
         supported ones in Wacom driver, from Aaron Armstrong Skomra and Jason
         Gerecke
      
       - sysfs interface fix for roccat driver from Dan Carpenter
      
       - support for new Asus HW (T100TAF, T100HA, T200TA) from Hans de Goede
      
       - improved support for Jabra devices, from Niels Skou Olsen
      
       - other assorted small fixes and new device IDs
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (30 commits)
        HID: quirks: Fix keyboard + touchpad on Toshiba Click Mini not working
        HID: roccat: prevent an out of bounds read in kovaplus_profile_activated()
        HID: asus: Fix special function keys on T200TA
        HID: asus: Add touchpad max x/y and resolution info for the T200TA
        HID: wacom: Add support for One by Wacom (CTL-472 / CTL-672)
        HID: wacom: Fix reporting of touch toggle (WACOM_HID_WD_MUTE_DEVICE) events
        HID: intel-ish-hid: Enable Cannon Lake and Coffee Lake laptop/desktop
        HID: elecom: rewrite report fixup for EX-G and future mice
        HID: sony: Report DS4 version info through sysfs
        HID: sony: Print reversed MAC address via %pMR
        HID: wacom: EKR: ensure devres groups at higher indexes are released
        HID: rmi: Support the Fujitsu R726 Pad dock using hid-rmi
        HID: add quirk for another PIXART OEM mouse used by HP
        HID: quirks: make array hid_quirks static
        HID: hid-multitouch: support fine-grain orientation reporting
        HID: asus: Add product-id for the T100TAF and T100HA keyboard docks
        HID: elo: clear BTN_LEFT mapping
        HID: multitouch: Combine all left-button events in a frame
        HID: multitouch: Only look at non touch fields in first packet of a frame
        HID: multitouch: Properly deal with Win8 PTP reports with 0 touches
        ...
      183b6366
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.16-1' of git://github.com/cminyard/linux-ipmi · 4c6790c4
      Linus Torvalds authored
      Pull IPMI updates from Corey Minyard:
       "Small fixes for various things, been sitting in next for a while (some
        a long time)"
      
      * tag 'for-linus-4.16-1' of git://github.com/cminyard/linux-ipmi:
        ipmi_ssif: Remove duplicate NULL check
        ipmi/powernv: Fix error return code in ipmi_powernv_probe()
        ipmi: use dynamic memory for DMI driver override
        ipmi/ipmi_powernv: remove outdated todo in powernv IPMI driver
        ipmi: Clear smi_info->thread to prevent use-after-free during module unload
        ipmi: use correct string length
        ipmi_si: Fix error handling of platform device
        ipmi watchdog: fix typo in parameter description
        ipmi_si_platform: Fix typo in parameter description
      4c6790c4
    • Linus Torvalds's avatar
      Merge tag 'for-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply · 972058ad
      Linus Torvalds authored
      Pull power supply and reset updates from Sebastian Reichel:
      
       - bq27xxx: add bq27521 support
      
       - drop unused imx-snvs-poweroff driver
      
       - improve axp288 driver
      
       - misc fixes
      
      * tag 'for-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (32 commits)
        power: supply: max17042_battery: Always fall back to default platform-data
        power: supply: max17042_battery: Check battery current for status when supplied
        MAINTAINERS: Add AXP288 PMIC entry
        power: supply: axp288_fuel_gauge: Do not register our psy on (some) HDMI sticks
        power: supply: axp288_fuel_gauge: Optimize get_current()
        power: supply: axp288_fuel_gauge: Rework get_status()
        power: reset: account for const type of of_device_id.data
        power: supply: account for const type of of_device_id.data
        bq24190: Simplify code in property_is_writeable
        power: supply: axp288_fuel_gauge: Get iio-channels once during boot
        power: supply: axp288_charger: Properly stop work on probe-error / remove
        power: supply: axp288_charger: Simplify extcon cable handling
        power: supply: axp288_charger: Use the right property for the input current limit
        power: supply: axp288_charger: Pick lower input current limit not higher
        power: supply: axp288_charger: Do not cache input current limit value
        power: supply: axp288_charger: Remove no longer needed locking
        power: supply: axp288_charger: Use regmap_update_bits to set the input limits
        power: supply: axp288_charger: Cleanup some double empty lines
        power: supply: axp288_charger: Remove charger-enabled state tracking
        power: supply: axp288_charger: Add missing newlines to some messages
        ...
      972058ad
    • Linus Torvalds's avatar
      Merge tag 'hsi-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi · a9e89e54
      Linus Torvalds authored
      Pull HSI update from Sebastian Reichel:
       "Y2038 fix for cmt-speech"
      
      * tag 'hsi-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
        HSI: cmt_speech: use timespec64 instead of timespec
      a9e89e54
    • Linus Torvalds's avatar
      Merge tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · 9798f517
      Linus Torvalds authored
      Pull GPIO updates from Linus Walleij:
       "The is the bulk of GPIO changes for the v4.16 kernel cycle. It is
        pretty calm this time around I think. I even got time to get to things
        like starting to clean up header includes.
      
        Core changes:
      
         - Disallow open drain and open source flags to be set simultaneously.
           This doesn't make electrical sense, and would the hardware actually
           respond to this setting, the result would be short circuit.
      
         - ACPI GPIO has a new core infrastructure for handling quirks. The
           quirks are there to deal with broken ACPI tables centrally instead
           of pushing the work to individual drivers. In the world of BIOS
           writers, the ACPI tables are perfect. Until they find a mistake in
           it. When such a mistake is found, we can patch it with a quirk. It
           should never happen, the problem is that it happens. So we
           accomodate for it.
      
         - Several documentation updates.
      
         - Revert the patch setting up initial direction state from reading
           the device. This was causing bad things for drivers that can't read
           status on all its pins. It is only affecting debugfs information
           quality.
      
         - Label descriptors with the device name if no explicit label is
           passed in.
      
         - Pave the ground for transitioning SPI and regulators to use GPIO
           descriptors by implementing some quirks in the device tree GPIO
           parsing code.
      
        New drivers:
      
         - New driver for the Access PCIe IDIO 24 family.
      
        Other:
      
         - Major refactorings and improvements to the GPIO mockup driver used
           for test and verification.
      
         - Moved the AXP209 driver over to pin control since it gained a pin
           control back-end. These patches will appear (with the same hashes)
           in the pin control pull request as well.
      
         - Convert the onewire GPIO driver w1-gpio to use descriptors. This is
           merged here since the W1 maintainers send very few pull requests
           and he ACKed it.
      
         - Start to clean up driver headers using <linux/gpio.h> to just use
           <linux/gpio/driver.h> as appropriate"
      
      * tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (103 commits)
        gpio: Timestamp events in hardirq handler
        gpio: Fix kernel stack leak to userspace
        gpio: Fix a documentation spelling mistake
        gpio: Documentation update
        gpiolib: remove redundant initialization of pointer desc
        gpio: of: Fix NPE from OF flags
        gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe()
        gpio: stmpe: Move an assignment in stmpe_gpio_probe()
        gpio: stmpe: Improve a size determination in stmpe_gpio_probe()
        gpio: stmpe: Use seq_putc() in stmpe_dbg_show()
        gpio: No NULL owner
        gpio: stmpe: i2c transfer are forbiden in atomic context
        gpio: davinci: Include proper header
        gpio: da905x: Include proper header
        gpio: cs5535: Include proper header
        gpio: crystalcove: Include proper header
        gpio: bt8xx: Include proper header
        gpio: bcm-kona: Include proper header
        gpio: arizona: Include proper header
        gpio: amd8111: Include proper header
        ...
      9798f517
    • Linus Torvalds's avatar
      Merge tag 'leds_for_4.16-rc1' of... · 50081e43
      Linus Torvalds authored
      Merge tag 'leds_for_4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
      
      Pull LED updates from Jacek Anaszewski:
       "New LED class driver:
         - introduce LM3692x dual string driver
      
        New LED trigger:
         - introduce a NETDEV trigger
      
        leds-lp8860:
         - various fixes to align with LED framework
         - add regulator enable during init
         - DT support related improvements
      
        Minor fixes and cleanups to the LED class drivers:
         - leds-pwm
         - ledtrig-activity
         - leds-blinkm
         - leds-as3645a
         - ledtrig-transient"
      
      * tag 'leds_for_4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
        leds: ledtrig-transient: Add SPDX license identifiers
        leds: lp8860: Various fixes to align with LED framework
        leds: lp8860: Add DT parsing to retrieve the trigger node
        dt: bindings: lp8860: Add trigger binding to the lp8860
        leds: lp8860: Update the dt parsing for LED labeling
        dt: bindings: lp8860: Update DT label binding
        dt: bindings: lp8860: Update bindings for lp8860
        leds: as3645a: Fix line over 80 characters
        leds: as3645a: Fix quoted string split warning
        leds: lm3692x: Introduce LM3692x dual string driver
        dt: bindings: lm3692x: Add bindings for lm3692x LED driver
        leds: trigger: Introduce a NETDEV trigger
        leds: blinkm: avoid uninitialized data use
        ledtrig-activity: Grammar s/a immediate/an immediate/
        leds: pwm: Remove unneeded header file
        leds: lp8860: Add regulator enable during init
        leds: lp8860: Fix linuxdoc format for structure
      50081e43
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · 7b1cd95d
      Linus Torvalds authored
      Pull RDMA subsystem updates from Jason Gunthorpe:
       "Overall this cycle did not have any major excitement, and did not
        require any shared branch with netdev.
      
        Lots of driver updates, particularly of the scale-up and performance
        variety. The largest body of core work was Parav's patches fixing and
        restructing some of the core code to make way for future RDMA
        containerization.
      
        Summary:
      
         - misc small driver fixups to
           bnxt_re/hfi1/qib/hns/ocrdma/rdmavt/vmw_pvrdma/nes
      
         - several major feature adds to bnxt_re driver: SRIOV VF RoCE
           support, HugePages support, extended hardware stats support, and
           SRQ support
      
         - a notable number of fixes to the i40iw driver from debugging scale
           up testing
      
         - more work to enable the new hip08 chip in the hns driver
      
         - misc small ULP fixups to srp/srpt//ipoib
      
         - preparation for srp initiator and target to support the RDMA-CM
           protocol for connections
      
         - add RDMA-CM support to srp initiator, srp target is still a WIP
      
         - fixes for a couple of places where ipoib could spam the dmesg log
      
         - fix encode/decode of FDR/EDR data rates in the core
      
         - many patches from Parav with ongoing work to clean up
           inconsistencies and bugs in RoCE support around the rdma_cm
      
         - mlx5 driver support for the userspace features 'thread domain',
           'wallclock timestamps' and 'DV Direct Connected transport'. Support
           for the firmware dual port rocee capability
      
         - core support for more than 32 rdma devices in the char dev
           allocation
      
         - kernel doc updates from Randy Dunlap
      
         - new netlink uAPI for inspecting RDMA objects similar in spirit to 'ss'
      
         - one minor change to the kobject code acked by Greg KH"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (259 commits)
        RDMA/nldev: Provide detailed QP information
        RDMA/nldev: Provide global resource utilization
        RDMA/core: Add resource tracking for create and destroy PDs
        RDMA/core: Add resource tracking for create and destroy CQs
        RDMA/core: Add resource tracking for create and destroy QPs
        RDMA/restrack: Add general infrastructure to track RDMA resources
        RDMA/core: Save kernel caller name when creating PD and CQ objects
        RDMA/core: Use the MODNAME instead of the function name for pd callers
        RDMA: Move enum ib_cq_creation_flags to uapi headers
        IB/rxe: Change RDMA_RXE kconfig to use select
        IB/qib: remove qib_keys.c
        IB/mthca: remove mthca_user.h
        RDMA/cm: Fix access to uninitialized variable
        RDMA/cma: Use existing netif_is_bond_master function
        IB/core: Avoid SGID attributes query while converting GID from OPA to IB
        RDMA/mlx5: Avoid memory leak in case of XRCD dealloc failure
        IB/umad: Fix use of unprotected device pointer
        IB/iser: Combine substrings for three messages
        IB/iser: Delete an unnecessary variable initialisation in iser_send_data_out()
        IB/iser: Delete an error message for a failed memory allocation in iser_send_data_out()
        ...
      7b1cd95d
    • Linus Torvalds's avatar
      Merge tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma · 2155e69a
      Linus Torvalds authored
      Pull dmaengine updates from Vinod Koul:
       "This time is smallish update with updates mainly to drivers:
      
         - updates to xilinx and zynqmp dma controllers
      
         - update reside calculation for rcar controller
      
         - more RSTify fixes for documentation
      
         - add support for race free transfer termination and updating for
           users for that
      
         - support for new rev of hidma with addition new APIs to get device
           match data in ACPI/OF
      
         - random updates to bunch of other drivers"
      
      * tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (47 commits)
        dmaengine: dmatest: fix container_of member in dmatest_callback
        dmaengine: stm32-dmamux: Remove unnecessary platform_get_resource() error check
        dmaengine: sprd: statify 'sprd_dma_prep_dma_memcpy'
        dmaengine: qcom_hidma: simplify DT resource parsing
        dmaengine: xilinx_dma: Free BD consistent memory
        dmaengine: xilinx_dma: Fix warning variable prev set but not used
        dmaengine: xilinx_dma: properly configure the SG mode bit in the driver for cdma
        dmaengine: doc: format struct fields using monospace
        dmaengine: doc: fix bullet list formatting
        dmaengine: ti-dma-crossbar: Fix event mapping for TPCC_EVT_MUX_60_63
        dmaengine: cppi41: Fix channel queues array size check
        dmaengine: imx-sdma: Add MODULE_FIRMWARE
        dmaengine: xilinx_dma: Fix typos
        dmaengine: xilinx_dma: Differentiate probe based on the ip type
        dmaengine: xilinx_dma: fix style issues from checkpatch
        dmaengine: xilinx_dma: Fix kernel doc warnings
        dmaengine: xilinx_dma: Fix race condition in the driver for multiple descriptor scenario
        dmaeninge: xilinx_dma: Fix bug in multiple frame stores scenario in vdma
        dmaengine: xilinx_dma: Check for channel idle state before submitting dma descriptor
        dmaengine: zynqmp_dma: Fix race condition in the probe
        ...
      2155e69a
    • Linus Torvalds's avatar
      Merge tag 'dma-mapping-4.16' of git://git.infradead.org/users/hch/dma-mapping · 2382dc9a
      Linus Torvalds authored
      Pull dma mapping updates from Christoph Hellwig:
       "Except for a runtime warning fix from Christian this is all about
        consolidation of the generic no-IOMMU code, a well as the glue code
        for swiotlb.
      
        All the code is based on the x86 implementation with hooks to allow
        all architectures that aren't cache coherent to use it.
      
        The x86 conversion itself has been deferred because the x86
        maintainers were a little busy in the last months"
      
      * tag 'dma-mapping-4.16' of git://git.infradead.org/users/hch/dma-mapping: (57 commits)
        MAINTAINERS: add the iommu list for swiotlb and xen-swiotlb
        arm64: use swiotlb_alloc and swiotlb_free
        arm64: replace ZONE_DMA with ZONE_DMA32
        mips: use swiotlb_{alloc,free}
        mips/netlogic: remove swiotlb support
        tile: use generic swiotlb_ops
        tile: replace ZONE_DMA with ZONE_DMA32
        unicore32: use generic swiotlb_ops
        ia64: remove an ifdef around the content of pci-dma.c
        ia64: clean up swiotlb support
        ia64: use generic swiotlb_ops
        ia64: replace ZONE_DMA with ZONE_DMA32
        swiotlb: remove various exports
        swiotlb: refactor coherent buffer allocation
        swiotlb: refactor coherent buffer freeing
        swiotlb: wire up ->dma_supported in swiotlb_dma_ops
        swiotlb: add common swiotlb_map_ops
        swiotlb: rename swiotlb_free to swiotlb_exit
        x86: rename swiotlb_dma_ops
        powerpc: rename swiotlb_dma_ops
        ...
      2382dc9a
    • Linus Torvalds's avatar
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 28bc6fb9
      Linus Torvalds authored
      Pull SCSI updates from James Bottomley:
       "This is mostly updates of the usual driver suspects: arcmsr,
        scsi_debug, mpt3sas, lpfc, cxlflash, qla2xxx, aacraid, megaraid_sas,
        hisi_sas.
      
        We also have a rework of the libsas hotplug handling to make it more
        robust, a slew of 32 bit time conversions and fixes, and a host of the
        usual minor updates and style changes. The biggest potential for
        regressions is the libsas hotplug changes, but so far they seem stable
        under testing"
      
      * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (313 commits)
        scsi: qla2xxx: Fix logo flag for qlt_free_session_done()
        scsi: arcmsr: avoid do_gettimeofday
        scsi: core: Add VENDOR_SPECIFIC sense code definitions
        scsi: qedi: Drop cqe response during connection recovery
        scsi: fas216: fix sense buffer initialization
        scsi: ibmvfc: Remove unneeded semicolons
        scsi: hisi_sas: fix a bug in hisi_sas_dev_gone()
        scsi: hisi_sas: directly attached disk LED feature for v2 hw
        scsi: hisi_sas: devicetree: bindings: add LED feature for v2 hw
        scsi: megaraid_sas: NVMe passthrough command support
        scsi: megaraid: use ktime_get_real for firmware time
        scsi: fnic: use 64-bit timestamps
        scsi: qedf: Fix error return code in __qedf_probe()
        scsi: devinfo: fix format of the device list
        scsi: qla2xxx: Update driver version to 10.00.00.05-k
        scsi: qla2xxx: Add XCB counters to debugfs
        scsi: qla2xxx: Fix queue ID for async abort with Multiqueue
        scsi: qla2xxx: Fix warning for code intentation in __qla24xx_handle_gpdb_event()
        scsi: qla2xxx: Fix warning during port_name debug print
        scsi: qla2xxx: Fix warning in qla2x00_async_iocb_timeout()
        ...
      28bc6fb9
    • Linus Torvalds's avatar
      Merge tag 'for-4.16/dm-changes' of... · 0be600a5
      Linus Torvalds authored
      Merge tag 'for-4.16/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
      
      Pull device mapper updates from Mike Snitzer:
      
       - DM core fixes to ensure that bio submission follows a depth-first
         tree walk; this is critical to allow forward progress without the
         need to use the bioset's BIOSET_NEED_RESCUER.
      
       - Remove DM core's BIOSET_NEED_RESCUER based dm_offload infrastructure.
      
       - DM core cleanups and improvements to make bio-based DM more efficient
         (e.g. reduced memory footprint as well leveraging per-bio-data more).
      
       - Introduce new bio-based mode (DM_TYPE_NVME_BIO_BASED) that leverages
         the more direct IO submission path in the block layer; this mode is
         used by DM multipath and also optimizes targets like DM thin-pool
         that stack directly on NVMe data device.
      
       - DM multipath improvements to factor out legacy SCSI-only (e.g.
         scsi_dh) code paths to allow for more optimized support for NVMe
         multipath.
      
       - A fix for DM multipath path selectors (service-time and queue-length)
         to select paths in a more balanced way; largely academic but doesn't
         hurt.
      
       - Numerous DM raid target fixes and improvements.
      
       - Add a new DM "unstriped" target that enables Intel to workaround
         firmware limitations in some NVMe drives that are striped internally
         (this target also works when stacked above the DM "striped" target).
      
       - Various Documentation fixes and improvements.
      
       - Misc cleanups and fixes across various DM infrastructure and targets
         (e.g. bufio, flakey, log-writes, snapshot).
      
      * tag 'for-4.16/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (69 commits)
        dm cache: Documentation: update default migration_throttling value
        dm mpath selector: more evenly distribute ties
        dm unstripe: fix target length versus number of stripes size check
        dm thin: fix trailing semicolon in __remap_and_issue_shared_cell
        dm table: fix NVMe bio-based dm_table_determine_type() validation
        dm: various cleanups to md->queue initialization code
        dm mpath: delay the retry of a request if the target responded as busy
        dm mpath: return DM_MAPIO_DELAY_REQUEUE if QUEUE_IO or PG_INIT_REQUIRED
        dm mpath: return DM_MAPIO_REQUEUE on blk-mq rq allocation failure
        dm log writes: fix max length used for kstrndup
        dm: backfill missing calls to mutex_destroy()
        dm snapshot: use mutex instead of rw_semaphore
        dm flakey: check for null arg_name in parse_features()
        dm thin: extend thinpool status format string with omitted fields
        dm thin: fixes in thin-provisioning.txt
        dm thin: document representation of <highest mapped sector> when there is none
        dm thin: fix documentation relative to low water mark threshold
        dm cache: be consistent in specifying sectors and SI units in cache.txt
        dm cache: delete obsoleted paragraph in cache.txt
        dm cache: fix grammar in cache-policies.txt
        ...
      0be600a5
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md · 040639b7
      Linus Torvalds authored
      Pull MD updates from Shaohua Li:
       "Some small fixes for MD:
      
         - fix raid5-cache potential problems if raid5 cache isn't fully
           recovered
      
         - fix a wait-within-wait warning in raid1/10
      
         - make raid5-PPL support disks with writeback cache enabled"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
        raid5-ppl: PPL support for disks with write-back cache enabled
        md/r5cache: print more info of log recovery
        md/raid1,raid10: silence warning about wait-within-wait
        md: introduce new personality funciton start()
      040639b7
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.16-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 20c59c71
      Linus Torvalds authored
      Pull xfs updates from Darrick Wong:
       "This merge cycle, we're again some substantive changes to XFS.
      
        Metadata verifiers have been restructured to provide more detail about
        which part of a metadata structure failed checks, and we've enhanced
        the new online fsck feature to cross-reference extent allocation
        information with the other metadata structures. With this pull, the
        metadata verification part of online fsck is more or less finished,
        though the feature is still experimental and still disabled by
        default.
      
        We're also preparing to remove the EXPERIMENTAL tag from a couple of
        features this cycle. This week we're committing a bunch of space
        accounting fixes for reflink and removing the EXPERIMENTAL tag from
        reflink; I anticipate that we'll be ready to do the same for the
        reverse mapping feature next week. (I don't have any pending fixes for
        rmap; however I wish to remove the tags one at a time.)
      
        This giant pile of patches has been run through a full xfstests run
        over the weekend and through a quick xfstests run against this
        morning's master, with no major failures reported. Let me know if
        there's any merge problems -- git merge reported that one of our
        patches touched the same function as the i_version series, but it
        resolved things cleanly.
      
        Summary:
      
         - Log faulting code locations when verifiers fail, for improved
           diagnosis of corrupt filesystems.
      
         - Implement metadata verifiers for local format inode fork data.
      
         - Online scrub now cross-references metadata records with other
           metadata.
      
         - Refactor the fs geometry ioctl generation functions.
      
         - Harden various metadata verifiers.
      
         - Fix various accounting problems.
      
         - Fix uncancelled transactions leaking when xattr functions fail.
      
         - Prevent the copy-on-write speculative preallocation garbage
           collector from racing with writeback.
      
         - Emit log reservation type information as trace data so that we can
           compare against xfsprogs.
      
         - Fix some erroneous asserts in the online scrub code.
      
         - Clean up the transaction reservation calculations.
      
         - Fix various minor bugs in online scrub.
      
         - Log complaints about mixed dio/buffered writes once per day and
           less noisily than before.
      
         - Refactor buffer log item lists to use list_head.
      
         - Break PNFS leases before reflinking blocks.
      
         - Reduce lock contention on reflink source files.
      
         - Fix some quota accounting problems with reflink.
      
         - Fix a serious corruption problem in the direct cow write code where
           we fed bad iomaps to the vfs iomap consumers.
      
         - Various other refactorings.
      
         - Remove EXPERIMENTAL tag from reflink!"
      
      * tag 'xfs-4.16-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (94 commits)
        xfs: remove experimental tag for reflinks
        xfs: don't screw up direct writes when freesp is fragmented
        xfs: check reflink allocation mappings
        iomap: warn on zero-length mappings
        xfs: treat CoW fork operations as delalloc for quota accounting
        xfs: only grab shared inode locks for source file during reflink
        xfs: allow xfs_lock_two_inodes to take different EXCL/SHARED modes
        xfs: reflink should break pnfs leases before sharing blocks
        xfs: don't clobber inobt/finobt cursors when xref with rmap
        xfs: skip CoW writes past EOF when writeback races with truncate
        xfs: preserve i_rdev when recycling a reclaimable inode
        xfs: refactor accounting updates out of xfs_bmap_btalloc
        xfs: refactor inode verifier corruption error printing
        xfs: make tracepoint inode number format consistent
        xfs: always zero di_flags2 when we free the inode
        xfs: call xfs_qm_dqattach before performing reflink operations
        xfs: bmap code cleanup
        Use list_head infra-structure for buffer's log items list
        Split buffer's b_fspriv field
        Get rid of xfs_buf_log_item_t typedef
        ...
      20c59c71
    • Linus Torvalds's avatar
      Merge branch 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 5a87e37e
      Linus Torvalds authored
      Pull get_user_pages_fast updates from Al Viro:
       "A bit more get_user_pages work"
      
      * 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        kvm: switch get_user_page_nowait() to get_user_pages_unlocked()
        __get_user_pages_locked(): get rid of notify_drop argument
        get_user_pages_unlocked(): pass true to __get_user_pages_locked() notify_drop
        cris: switch to get_user_pages_fast()
        fold __get_user_pages_unlocked() into its sole remaining caller
      5a87e37e
    • Linus Torvalds's avatar
      Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 19e7b5f9
      Linus Torvalds authored
      Pull misc vfs updates from Al Viro:
       "All kinds of misc stuff, without any unifying topic, from various
        people.
      
        Neil's d_anon patch, several bugfixes, introduction of kvmalloc
        analogue of kmemdup_user(), extending bitfield.h to deal with
        fixed-endians, assorted cleanups all over the place..."
      
      * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (28 commits)
        alpha: osf_sys.c: use timespec64 where appropriate
        alpha: osf_sys.c: fix put_tv32 regression
        jffs2: Fix use-after-free bug in jffs2_iget()'s error handling path
        dcache: delete unused d_hash_mask
        dcache: subtract d_hash_shift from 32 in advance
        fs/buffer.c: fold init_buffer() into init_page_buffers()
        fs: fold __inode_permission() into inode_permission()
        fs: add RWF_APPEND
        sctp: use vmemdup_user() rather than badly open-coding memdup_user()
        snd_ctl_elem_init_enum_names(): switch to vmemdup_user()
        replace_user_tlv(): switch to vmemdup_user()
        new primitive: vmemdup_user()
        memdup_user(): switch to GFP_USER
        eventfd: fold eventfd_ctx_get() into eventfd_ctx_fileget()
        eventfd: fold eventfd_ctx_read() into eventfd_read()
        eventfd: convert to use anon_inode_getfd()
        nfs4file: get rid of pointless include of btrfs.h
        uvc_v4l2: clean copyin/copyout up
        vme_user: don't use __copy_..._user()
        usx2y: don't bother with memdup_user() for 16-byte structure
        ...
      19e7b5f9
    • Linus Torvalds's avatar
      Merge tag 'gfs2-4.16.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 · 26064ea4
      Linus Torvalds authored
      Pull GFS2 updates from Bob Peterson:
       "We've got 30 patches for this merge window. These generally fall into
        five categories:
      
         - code cleanups
      
         - patches related to adding PUNCH_HOLE support to GFS2
      
         - support for new fields in resource group headers
      
         - a few bug fixes
      
         - support for new fields in journal log headers. These new fields,
           which were previously unused, are designed to make it easier to
           track down file system corruption, and allow fsck.gfs2 to make more
           intelligent decisions when finding and fixing file system
           corruption.
      
        Details:
      
         - Two patches from Abhi Das, to trim the ordered writes list, which
           used to grow uncontrollably until unmount.
      
         - Several patches from Andreas Gruenbacher: remove an unused
           parameter from function gfs2_write_jdata_pagevec, remove a
           pointless BUG_ON, clean up an error patch in trunc_start, remove
           some unused parameters from truncate, make gfs2_journaled_truncate
           more efficient, clean up the support functions for truncate, fix
           metadata read-ahead for truncate to make it faster, fix up the
           non-recursive truncate code, rework and rename
           gfs2_block_truncate_page, generalize the non-recursive truncate
           code so it can take a range of values for punch_hole support,
           introduce new PUNCH_HOLE support that take advantage of the
           previous patches, add fallocate support with PUNCH_HOLE, fix some
           typos in the comments, add the function gfs2_max_stuffed_size to
           replace a piece of code that was needlessly repeated throughout
           GFS2, a minor cleanup to function gfs2_page_add_databufs, get rid
           of function gfs2_log_header_in in preparation for the new log
           header fields, and also fix up some missing newlines in kernel
           messages.
      
         - Andy Price added a new field to resource groups to indicate where
           the next one should be, to allow fsck.gfs2 to make better repairs.
           He also added new rindex fields for consistency checking, and added
           a crc field to resource group headers for consistency checking.
      
         - I reduced redundancy in functions common to freeing dinodes, and
           when writing log headers between the journalling code and journal
           recovery code. Also added new fields to journal log headers based
           on a prototype from Steve Whitehouse, and log the source of journal
           log headers so we can better track down journal corruption. Minor
           comment typo fix and a fix for a BUG in an unlink error path.
      
         - Steve Whitehouse contributed a patch to fix an incorrect use of the
           gfs2_blk2rgrpd function.
      
         - Tetsuo Handa contributed a patch that fixes incorrect error
           handling in function init_gfs2_fs"
      
      * tag 'gfs2-4.16.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: (30 commits)
        gfs2: Add a few missing newlines in messages
        gfs2: Remove inode from ordered write list in gfs2_write_inode()
        GFS2: Don't try to end a non-existent transaction in unlink
        GFS2: Fix minor comment typo
        GFS2: Log the reason for log flushes in every log header
        GFS2: Introduce new gfs2_log_header_v2
        gfs2: Get rid of gfs2_log_header_in
        gfs2: Minor gfs2_page_add_databufs cleanup
        gfs2: Add gfs2_max_stuffed_size
        gfs2: Typo fixes
        gfs2: Implement fallocate(FALLOC_FL_PUNCH_HOLE)
        gfs2: Turn trunc_dealloc into punch_hole
        gfs2: Generalize truncate code
        Turn gfs2_block_truncate_page into gfs2_block_zero_range
        gfs2: Improve non-recursive delete algorithm
        gfs2: Fix metadata read-ahead during truncate
        gfs2: Clean up {lookup,fillup}_metapath
        gfs2: Remove minor gfs2_journaled_truncate inefficiencies
        gfs2: truncate: Remove unnecessary oldsize parameters
        gfs2: Clean up trunc_start error path
        ...
      26064ea4
    • Eric Biggers's avatar
      devpts: fix error handling in devpts_mntget() · c9cc8d01
      Eric Biggers authored
      If devpts_ptmx_path() returns an error code, then devpts_mntget()
      dereferences an ERR_PTR():
      
          BUG: unable to handle kernel paging request at fffffffffffffff5
          IP: devpts_mntget+0x13f/0x280 fs/devpts/inode.c:173
      
      Fix it by returning early in the error paths.
      
      Reproducer:
      
          #define _GNU_SOURCE
          #include <fcntl.h>
          #include <sched.h>
          #include <sys/ioctl.h>
          #define TIOCGPTPEER _IO('T', 0x41)
      
          int main()
          {
              for (;;) {
                  int fd = open("/dev/ptmx", 0);
                  unshare(CLONE_NEWNS);
                  ioctl(fd, TIOCGPTPEER, 0);
              }
          }
      
      Fixes: 311fc65c ("pty: Repair TIOCGPTPEER")
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Cc: <stable@vger.kernel.org> # v4.13+
      Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c9cc8d01
    • Jeff Layton's avatar
      iversion: make inode_cmp_iversion{+raw} return bool instead of s64 · c0cef30e
      Jeff Layton authored
      As Linus points out:
      
          The inode_cmp_iversion{+raw}() functions are pure and utter crap.
      
          Why?
      
          You say that they return 0/negative/positive, but they do so in a
          completely broken manner. They return that ternary value as the
          sequence number difference in a 's64', which means that if you
          actually care about that ternary value, and do the *sane* thing that
          the kernel-doc of the function implies is the right thing, you would
          do
      
              int cmp = inode_cmp_iversion(inode, old);
              if (cmp < 0 ...
      
          and as a result you get code that looks sane, but that doesn't
          actually *WORK* right.
      
      Since none of the callers actually care about the ternary value here,
      convert the inode_cmp_iversion{+raw} functions to just return a boolean
      value (false for matching, true for non-matching).
      
      This matches the existing use of these functions just fine, and makes it
      simple to convert them to return a ternary value in the future if we
      grow callers that need it.
      
      With this change we can also reimplement inode_cmp_iversion in a simpler
      way using inode_peek_iversion.
      Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c0cef30e
    • Jiri Kosina's avatar
      Merge branch 'for-4.16/remove-immediate' into for-linus · d05b695c
      Jiri Kosina authored
      Pull 'immediate' feature removal from Miroslav Benes.
      d05b695c
    • Jiri Kosina's avatar
      Merge branches 'for-4.16/upstream' and 'for-4.15/upstream-fixes' into for-linus · c86aa012
      Jiri Kosina authored
      Pull assorted small fixes queued for merge window.
      c86aa012
    • Jiri Kosina's avatar
      e56236b0
    • Jiri Kosina's avatar
      Merge branch 'for-4.16/wacom' into for-linus · 740c84ee
      Jiri Kosina authored
      Pull Wacom device driver updates. These don't have to go on top of the
      hid_have_special_driver[] revamp, as the whole group is assumed to
      have a special driver based on VID.
      740c84ee
    • Jiri Kosina's avatar
      Merge branch 'for-4.16/elo' into for-linus · a44f3ec6
      Jiri Kosina authored
      Pull hid-elo device detection fix
      a44f3ec6
    • Jiri Kosina's avatar
      Merge branches 'for-4.16/hid-quirks-cleanup/asus',... · 79084494
      Jiri Kosina authored
      Merge branches 'for-4.16/hid-quirks-cleanup/asus', 'for-4.16/hid-quirks-cleanup/elecom', 'for-4.16/hid-quirks-cleanup/ish', 'for-4.16/hid-quirks-cleanup/multitouch', 'for-4.16/hid-quirks-cleanup/pixart', 'for-4.16/hid-quirks-cleanup/rmi', 'for-4.16/hid-quirks-cleanup/sony' and 'for-4.16/hid-quirks-cleanup/toshiba' into for-linus
      
      Pull assorted device driver fixes (ASUS, Elecom, Intel-ISH, Multitouch, PixArt, RMI,
      Sony and Toshiba) based on top the hid-quirks revamp.
      79084494
    • Jiri Kosina's avatar
      Merge branch 'for-4.16/hid-quirks-cleanup/_base' into for-linus · a7acb31d
      Jiri Kosina authored
      This series from Benjamin Tissoires finally removes one of the big PITAs
      in the hid-core, which is the absolute need of having added all the new
      device IDs into the horrid hid_have_special_driver[]
      a7acb31d
    • Vinod Koul's avatar
      Merge branch 'topic/xilinx' into for-linus · 330542fc
      Vinod Koul authored
      330542fc
    • Vinod Koul's avatar
      Merge branch 'topic/virt-dma' into for-linus · b8e1a963
      Vinod Koul authored
      b8e1a963
    • Vinod Koul's avatar
      Merge branch 'topic/timb' into for-linus · cea0dd4d
      Vinod Koul authored
      cea0dd4d
    • Vinod Koul's avatar
      Merge branch 'topic/ti' into for-linus · db90305b
      Vinod Koul authored
      db90305b
    • Vinod Koul's avatar
      Merge branch 'topic/tegra' into for-linus · 21359a84
      Vinod Koul authored
      21359a84
    • Vinod Koul's avatar
      Merge branch 'topic/stm' into for-linus · 6811837d
      Vinod Koul authored
      6811837d
    • Vinod Koul's avatar
      Merge branch 'topic/sprd' into for-linus · 581f5b14
      Vinod Koul authored
      581f5b14
    • Vinod Koul's avatar
      Merge branch 'topic/rcar' into for-linus · 5039104f
      Vinod Koul authored
      5039104f
    • Vinod Koul's avatar
      2cb1800c
    • Vinod Koul's avatar
      Merge branch 'topic/qcom' into for-linus · c203f677
      Vinod Koul authored
      c203f677
    • Vinod Koul's avatar
      Merge branch 'topic/mic' into for-linus · c4cc2c3a
      Vinod Koul authored
      c4cc2c3a
    • Vinod Koul's avatar
      Merge branch 'topic/imx' into for-linus · bcf73a7b
      Vinod Koul authored
      bcf73a7b