Check return values of dma_set_mask_and_coherent().

Otherwise, if dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
fails, the following piece of code will be executed even when the call
to dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); returns 0:

dev_err(&pdev->dev, "DMA mask error %d\n", rc);
goto err_out_regions;

Addresses-Coverity-ID: 1474553 ("Unchecked return value")
Fixes: 13812621 ("skd: switch to the generic DMA API")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

If a block device is hot-added when we are out of grants,
gnttab_grant_foreign_access fails with -ENOSPC (log message "28
granting access to ring page") in this code path:

  talk_to_blkback ->
	setup_blkring ->
		xenbus_grant_ring ->
			gnttab_grant_foreign_access

and the failing path in talk_to_blkback sets the driver_data to NULL:

 destroy_blkring:
        blkif_free(info, 0);

        mutex_lock(&blkfront_mutex);
        free_info(info);
        mutex_unlock(&blkfront_mutex);

        dev_set_drvdata(&dev->dev, NULL);

This results in a NULL pointer BUG when blkfront_remove and blkif_free
try to access the failing device's NULL struct blkfront_info.

Cc: stable@vger.kernel.org # 4.5 and later
Signed-off-by: Vasilis Liaskovitis <vliaskovitis@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Pull sound updates from Takashi Iwai:
 "There have been little changes in ALSA core stuff, but ASoC core still
  kept rolling for the continued restructuring. The rest are lots of
  small driver-specific changes and some minor API updates. Here are
  highlights:

  General:
  - Appropriate fall-through annotations everywhere
  - Some code cleanup in memalloc code, handling non-cacahed pages more
    commonly in the helper
  - Deployment of SNDRV_PCM_INFO_SYNC_APPLPTR flag consistently

  Drivers:
  - More HD-audio CA0132 codec improvement for supporting other Creative
    boards
  - Plumbing legacy HD-audio codecs as ASoC BE on Intel SST; this will
    give move support of existing HD-audio devices with DSP
  - A few device-specific HD-audio quirks as usual
  - New quirk for RME CC devices and correction for B&W PX for USB-audio
  - FireWire: code refactoring including devres usages

  ASoC Core:
  - Continued componentization works; it's almost done!
  - A bunch of new for_each_foo macros
  - Cleanups and fixes in DAPM code

  ASoC Drivers:
  - MCLK support for several different devices, including CS42L51, STM32
    SAI, and MAX98373
  - Support for Allwinner A64 CODEC analog, Intel boards with DA7219 and
    MAX98927, Meson AXG PDM inputs, Nuvoton NAU8822, Renesas R8A7744 and
    TI PCM3060"

* tag 'sound-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (299 commits)
  ASoC: stm32: sai: fix master clock naming
  ASoC: stm32: add clock dependency for sai
  ALSA: hda/ca0132 - Actually fix microphone issue
  ASoC: sun4i-i2s: move code from startup/shutdown hooks into pm_runtime hooks
  ASoC: wm2000: Remove wm2000_read helper function
  ASoC: cs42l51: fix mclk support
  ASoC: wm_adsp: Log addresses as 8 digits in wm_adsp_buffer_populate
  ASoC: wm_adsp: Rename memory fields in wm_adsp_buffer
  ASoC: cs42l51: add mclk support
  ASoC: stm32: sai: set sai as mclk clock provider
  ASoC: dt-bindings: add mclk support to cs42l51
  ASoC: dt-bindings: add mclk provider support to stm32 sai
  ASoC: soc-core: fix trivial checkpatch issues
  ASoC: dapm: Add support for hw_free on CODEC to CODEC links
  ASoC: Intel: kbl_da7219_max98927: minor white space clean up
  ALSA: i2c/cs8427: Fix int to char conversion
  ALSA: doc: Brush up the old writing-an-alsa-driver
  ASoC: rsnd: tidyup SSICR::SWSP for TDM
  ASoC: rsnd: enable TDM settings for SSI parent
  ASoC: pcm3168a: add hw constraint for capture channel
  ...

Pull SCSI updates from James Bottomley:
 "This is mostly updates of the usual drivers: UFS, esp_scsi, NCR5380,
  qla2xxx, lpfc, libsas, hisi_sas.

  In addition there's a set of mostly small updates to the target
  subsystem a set of conversions to the generic DMA API, which do have
  some potential for issues in the older drivers but we'll handle those
  as case by case fixes.

  A new myrs driver for the DAC960/mylex raid controllers to replace the
  block based DAC960 which is also being removed by Jens in this merge
  window.

  Plus the usual slew of trivial changes"

[ "myrs" stands for "MYlex Raid Scsi". Obviously. Silly of me to even
  wonder. There's also a "myrb" driver, where the 'b' stands for
  'block'. Truly, somebody has got mad naming skillz. - Linus ]

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (237 commits)
  scsi: myrs: Fix the processor absent message in processor_show()
  scsi: myrs: Fix a logical vs bitwise bug
  scsi: hisi_sas: Fix NULL pointer dereference
  scsi: myrs: fix build failure on 32 bit
  scsi: fnic: replace gross legacy tag hack with blk-mq hack
  scsi: mesh: switch to generic DMA API
  scsi: ips: switch to generic DMA API
  scsi: smartpqi: fully convert to the generic DMA API
  scsi: vmw_pscsi: switch to generic DMA API
  scsi: snic: switch to generic DMA API
  scsi: qla4xxx: fully convert to the generic DMA API
  scsi: qla2xxx: fully convert to the generic DMA API
  scsi: qla1280: switch to generic DMA API
  scsi: qedi: fully convert to the generic DMA API
  scsi: qedf: fully convert to the generic DMA API
  scsi: pm8001: switch to generic DMA API
  scsi: nsp32: switch to generic DMA API
  scsi: mvsas: fully convert to the generic DMA API
  scsi: mvumi: switch to generic DMA API
  scsi: mpt3sas: switch to generic DMA API
  ...

Pull PCI updates from Bjorn Helgaas:

 - Fix ASPM link_state teardown on removal (Lukas Wunner)

 - Fix misleading _OSC ASPM message (Sinan Kaya)

 - Make _OSC optional for PCI (Sinan Kaya)

 - Don't initialize ASPM link state when ACPI_FADT_NO_ASPM is set
   (Patrick Talbert)

 - Remove x86 and arm64 node-local allocation for host bridge structures
   (Punit Agrawal)

 - Pay attention to device-specific _PXM node values (Jonathan Cameron)

 - Support new Immediate Readiness bit (Felipe Balbi)

 - Differentiate between pciehp surprise and safe removal (Lukas Wunner)

 - Remove unnecessary pciehp includes (Lukas Wunner)

 - Drop pciehp hotplug_slot_ops wrappers (Lukas Wunner)

 - Tolerate PCIe Slot Presence Detect being hardwired to zero to
   workaround broken hardware, e.g., the Wilocity switch/wireless device
   (Lukas Wunner)

 - Unify pciehp controller & slot structs (Lukas Wunner)

 - Constify hotplug_slot_ops (Lukas Wunner)

 - Drop hotplug_slot_info (Lukas Wunner)

 - Embed hotplug_slot struct into users instead of allocating it
   separately (Lukas Wunner)

 - Initialize PCIe port service drivers directly instead of relying on
   initcall ordering (Keith Busch)

 - Restore PCI config state after a slot reset (Keith Busch)

 - Save/restore DPC config state along with other PCI config state
   (Keith Busch)

 - Reference count devices during AER handling to avoid race issue with
   concurrent hot removal (Keith Busch)

 - If an Upstream Port reports ERR_FATAL, don't try to read the Port's
   config space because it is probably unreachable (Keith Busch)

 - During error handling, use slot-specific reset instead of secondary
   bus reset to avoid link up/down issues on hotplug ports (Keith Busch)

 - Restore previous AER/DPC handling that does not remove and
   re-enumerate devices on ERR_FATAL (Keith Busch)

 - Notify all drivers that may be affected by error recovery resets
   (Keith Busch)

 - Always generate error recovery uevents, even if a driver doesn't have
   error callbacks (Keith Busch)

 - Make PCIe link active reporting detection generic (Keith Busch)

 - Support D3cold in PCIe hierarchies during system sleep and runtime,
   including hotplug and Thunderbolt ports (Mika Westerberg)

 - Handle hpmemsize/hpiosize kernel parameters uniformly, whether slots
   are empty or occupied (Jon Derrick)

 - Remove duplicated include from pci/pcie/err.c and unused variable
   from cpqphp (YueHaibing)

 - Remove driver pci_cleanup_aer_uncorrect_error_status() calls (Oza
   Pawandeep)

 - Uninline PCI bus accessors for better ftracing (Keith Busch)

 - Remove unused AER Root Port .error_resume method (Keith Busch)

 - Use kfifo in AER instead of a local version (Keith Busch)

 - Use threaded IRQ in AER bottom half (Keith Busch)

 - Use managed resources in AER core (Keith Busch)

 - Reuse pcie_port_find_device() for AER injection (Keith Busch)

 - Abstract AER interrupt handling to disconnect error injection (Keith
   Busch)

 - Refactor AER injection callbacks to simplify future improvments
   (Keith Busch)

 - Remove unused Netronome NFP32xx Device IDs (Jakub Kicinski)

 - Use bitmap_zalloc() for dma_alias_mask (Andy Shevchenko)

 - Add switch fall-through annotations (Gustavo A. R. Silva)

 - Remove unused Switchtec quirk variable (Joshua Abraham)

 - Fix pci.c kernel-doc warning (Randy Dunlap)

 - Remove trivial PCI wrappers for DMA APIs (Christoph Hellwig)

 - Add Intel GPU device IDs to spurious interrupt quirk (Bin Meng)

 - Run Switchtec DMA aliasing quirk only on NTB endpoints to avoid
   useless dmesg errors (Logan Gunthorpe)

 - Update Switchtec NTB documentation (Wesley Yung)

 - Remove redundant "default n" from Kconfig (Bartlomiej Zolnierkiewicz)

 - Avoid panic when drivers enable MSI/MSI-X twice (Tonghao Zhang)

 - Add PCI support for peer-to-peer DMA (Logan Gunthorpe)

 - Add sysfs group for PCI peer-to-peer memory statistics (Logan
   Gunthorpe)

 - Add PCI peer-to-peer DMA scatterlist mapping interface (Logan
   Gunthorpe)

 - Add PCI configfs/sysfs helpers for use by peer-to-peer users (Logan
   Gunthorpe)

 - Add PCI peer-to-peer DMA driver writer's documentation (Logan
   Gunthorpe)

 - Add block layer flag to indicate driver support for PCI peer-to-peer
   DMA (Logan Gunthorpe)

 - Map Infiniband scatterlists for peer-to-peer DMA if they contain P2P
   memory (Logan Gunthorpe)

 - Register nvme-pci CMB buffer as PCI peer-to-peer memory (Logan
   Gunthorpe)

 - Add nvme-pci support for PCI peer-to-peer memory in requests (Logan
   Gunthorpe)

 - Use PCI peer-to-peer memory in nvme (Stephen Bates, Steve Wise,
   Christoph Hellwig, Logan Gunthorpe)

 - Cache VF config space size to optimize enumeration of many VFs
   (KarimAllah Ahmed)

 - Remove unnecessary <linux/pci-ats.h> include (Bjorn Helgaas)

 - Fix VMD AERSID quirk Device ID matching (Jon Derrick)

 - Fix Cadence PHY handling during probe (Alan Douglas)

 - Signal Cadence Endpoint interrupts via AXI region 0 instead of last
   region (Alan Douglas)

 - Write Cadence Endpoint MSI interrupts with 32 bits of data (Alan
   Douglas)

 - Remove redundant controller tests for "device_type == pci" (Rob
   Herring)

 - Document R-Car E3 (R8A77990) bindings (Tho Vu)

 - Add device tree support for R-Car r8a7744 (Biju Das)

 - Drop unused mvebu PCIe capability code (Thomas Petazzoni)

 - Add shared PCI bridge emulation code (Thomas Petazzoni)

 - Convert mvebu to use shared PCI bridge emulation (Thomas Petazzoni)

 - Add aardvark Root Port emulation (Thomas Petazzoni)

 - Support 100MHz/200MHz refclocks for i.MX6 (Lucas Stach)

 - Add initial power management for i.MX7 (Leonard Crestez)

 - Add PME_Turn_Off support for i.MX7 (Leonard Crestez)

 - Fix qcom runtime power management error handling (Bjorn Andersson)

 - Update TI dra7xx unaligned access errata workaround for host mode as
   well as endpoint mode (Vignesh R)

 - Fix kirin section mismatch warning (Nathan Chancellor)

 - Remove iproc PAXC slot check to allow VF support (Jitendra Bhivare)

 - Quirk Keystone K2G to limit MRRS to 256 (Kishon Vijay Abraham I)

 - Update Keystone to use MRRS quirk for host bridge instead of open
   coding (Kishon Vijay Abraham I)

 - Refactor Keystone link establishment (Kishon Vijay Abraham I)

 - Simplify and speed up Keystone link training (Kishon Vijay Abraham I)

 - Remove unused Keystone host_init argument (Kishon Vijay Abraham I)

 - Merge Keystone driver files into one (Kishon Vijay Abraham I)

 - Remove redundant Keystone platform_set_drvdata() (Kishon Vijay
   Abraham I)

 - Rename Keystone functions for uniformity (Kishon Vijay Abraham I)

 - Add Keystone device control module DT binding (Kishon Vijay Abraham
   I)

 - Use SYSCON API to get Keystone control module device IDs (Kishon
   Vijay Abraham I)

 - Clean up Keystone PHY handling (Kishon Vijay Abraham I)

 - Use runtime PM APIs to enable Keystone clock (Kishon Vijay Abraham I)

 - Clean up Keystone config space access checks (Kishon Vijay Abraham I)

 - Get Keystone outbound window count from DT (Kishon Vijay Abraham I)

 - Clean up Keystone outbound window configuration (Kishon Vijay Abraham
   I)

 - Clean up Keystone DBI setup (Kishon Vijay Abraham I)

 - Clean up Keystone ks_pcie_link_up() (Kishon Vijay Abraham I)

 - Fix Keystone IRQ status checking (Kishon Vijay Abraham I)

 - Add debug messages for all Keystone errors (Kishon Vijay Abraham I)

 - Clean up Keystone includes and macros (Kishon Vijay Abraham I)

 - Fix Mediatek unchecked return value from devm_pci_remap_iospace()
   (Gustavo A. R. Silva)

 - Fix Mediatek endpoint/port matching logic (Honghui Zhang)

 - Change Mediatek Root Port Class Code to PCI_CLASS_BRIDGE_PCI (Honghui
   Zhang)

 - Remove redundant Mediatek PM domain check (Honghui Zhang)

 - Convert Mediatek to pci_host_probe() (Honghui Zhang)

 - Fix Mediatek MSI enablement (Honghui Zhang)

 - Add Mediatek system PM support for MT2712 and MT7622 (Honghui Zhang)

 - Add Mediatek loadable module support (Honghui Zhang)

 - Detach VMD resources after stopping root bus to prevent orphan
   resources (Jon Derrick)

 - Convert pcitest build process to that used by other tools (iio, perf,
   etc) (Gustavo Pimentel)

* tag 'pci-v4.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (140 commits)
  PCI/AER: Refactor error injection fallbacks
  PCI/AER: Abstract AER interrupt handling
  PCI/AER: Reuse existing pcie_port_find_device() interface
  PCI/AER: Use managed resource allocations
  PCI: pcie: Remove redundant 'default n' from Kconfig
  PCI: aardvark: Implement emulated root PCI bridge config space
  PCI: mvebu: Convert to PCI emulated bridge config space
  PCI: mvebu: Drop unused PCI express capability code
  PCI: Introduce PCI bridge emulated config space common logic
  PCI: vmd: Detach resources after stopping root bus
  nvmet: Optionally use PCI P2P memory
  nvmet: Introduce helper functions to allocate and free request SGLs
  nvme-pci: Add support for P2P memory in requests
  nvme-pci: Use PCI p2pmem subsystem to manage the CMB
  IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]()
  block: Add PCI P2P flag for request queue
  PCI/P2PDMA: Add P2P DMA driver writer's documentation
  docs-rst: Add a new directory for PCI documentation
  PCI/P2PDMA: Introduce configfs/sysfs enable attribute helpers
  PCI/P2PDMA: Add PCI p2pmem DMA mappings to adjust the bus offset
  ...

Pull dmaengine updates from Vinod Koul:

 - Support for ColdFire mcf5441x edma controller

 - Support for link list mode in sprd dma

 - More users of managed dmaenginem_async_device_register API

 - Cyclic mode support in owl dma driver

 - DT updates for renesas drivers, dma-jz4780 updates and support for
   JZ4770, JZ4740 and JZ4725B controllers

 - Removal of deprecated dma_slave_config direction in dmaengine
   drivers, few more users will be removed in next cycle and eventually
   removed.

 - Minor updates to idma64, ioat, pxa, ppc drivers

* tag 'dmaengine-4.20-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (66 commits)
  dmaengine: ppc4xx: fix off-by-one build failure
  dmaengine: owl: Fix warnings generated during build
  dmaengine: fsl-edma: remove dma_slave_config direction usage
  dmaengine: rcar-dmac: set scatter/gather max segment size
  dmaengine: mmp_tdma: remove dma_slave_config direction usage
  dmaengine: ep93xx_dma: remove dma_slave_config direction usage
  dmaengine: k3dma: remove dma_slave_config direction usage
  dmaengine: k3dma: dont use direction for memcpy
  dmaengine: imx-dma: remove dma_slave_config direction usage
  dmaengine: idma: remove dma_slave_config direction usage
  dmaengine: hsu: remove dma_slave_config direction usage
  dmaengine: dw: remove dma_slave_config direction usage
  dmaengine: jz4740: remove dma_slave_config direction usage
  dmaengine: coh901318: remove dma_slave_config direction usage
  dmaengine: bcm2835: remove dma_slave_config direction usage
  dmaengine: at_hdmac: remove dma_slave_config direction usage
  dmaengine: owl: Add Slave and Cyclic mode support for Actions Semi Owl S900 SoC
  dmaengine: ioat: fix prototype of ioat_enumerate_channels
  dmaengine: stm32-dma: check whether length is aligned on FIFO threshold
  dt-bindings: dmaengine: usb-dmac: Add binding for r8a7744
  ...

Pull EDAC updates from Borislav Petkov:
 "The EDAC tree was busier than usual this cycle as the shortlog below
  shows.

  Also, this pull request is carrying an ACPI DSM driver which is used
  to ask the platform to supply the DIMM location of a reported hardware
  error and thus simplify all the EDAC logic when trying to map the
  error address to the respective DIMM.

  Core EDAC updates:

   - amd64_edac: AMD family 0x17, models 0x10-0x2f support (Michael Jin)
     Hygon Dhyana support (Pu Wen)

   - sb_edac: New maintainer + fixes (Tony Luck) Error reporting
     improvements and fixes (Qiuxu Zhuo)

   - ghes_edac: SMBIOS handle type 17 for DIMM locating and per-DIMM
     error accounting (Fan Wu)

   - altera_edac: Stratix10 support and refactoring (Thor Thayer)

  Out of tree addition:

   - acpi_adxl: Address Translation interface using an ACPI DSM (Tony
     Luck)

   - the usual amount of other misc fixes and cleanups all over"

* tag 'edac_for_4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (22 commits)
  ACPI/ADXL: Add address translation interface using an ACPI DSM
  EDAC, thunderx: Fix memory leak in thunderx_l2c_threaded_isr()
  EDAC, skx_edac: Fix logical channel intermediate decoding
  EDAC, {i7core,sb,skx}_edac: Fix uncorrected error counting
  EDAC, altera: Work around int-to-pointer-cast warnings
  EDAC, amd64: Add Hygon Dhyana support
  EDAC: Raise the maximum number of memory controllers
  arm64: dts: stratix10: Add peripheral EDAC nodes
  EDAC, altera: Add Stratix10 peripheral support
  EDAC, altera: Merge Stratix10 into the Arria10 SDRAM probe routine
  arm64: dts: stratix10: Add SDRAM node
  EDAC, altera: Combine Stratix10 and Arria10 probe functions
  arm64: dts: stratix10: Additions to EDAC System Manager
  EDAC, i7core: Remove set but not used variable pvt
  EDAC, ghes: Use CPER module handles to locate DIMMs
  EDAC: Correct DIMM capacity unit symbol
  EDAC, sb_edac: Fix signedness bugs in *_get_ha() functions
  EDAC, sb_edac: Fix reporting for patrol scrubber errors
  EDAC, sb_edac: Return early on ADDRV bit and address type test
  MAINTAINERS: Update maintainer for drivers/edac/sb_edac.c
  ...

Pull libnvdimm updates from Dan Williams:

 - Improve the efficiency and performance of reading nvdimm-namespace
   labels. Reduce the amount of label data read at driver load time by a
   few orders of magnitude. Reduce heavyweight call-outs to
   platform-firmware routines.

 - Handle media errors located in the 'struct page' array stored on a
   persistent memory namespace. Let the kernel clear these errors rather
   than an awkward userspace workaround.

 - Fix Address Range Scrub (ARS) completion tracking. Correct occasions
   where the kernel indicates completion of ARS before submission.

 - Fix asynchronous device registration reference counting.

 - Add support for reporting an nvdimm dirty-shutdown-count via sysfs.

 - Fix various small libnvdimm core and uapi issues.

* tag 'libnvdimm-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (21 commits)
  acpi, nfit: Further restrict userspace ARS start requests
  acpi, nfit: Fix Address Range Scrub completion tracking
  UAPI: ndctl: Remove use of PAGE_SIZE
  UAPI: ndctl: Fix g++-unsupported initialisation in headers
  tools/testing/nvdimm: Populate dirty shutdown data
  acpi, nfit: Collect shutdown status
  acpi, nfit: Introduce nfit_mem flags
  libnvdimm, label: Fix sparse warning
  nvdimm: Use namespace index data to reduce number of label reads needed
  nvdimm: Split label init out from the logic for getting config data
  nvdimm: Remove empty if statement
  nvdimm: Clarify comment in sizeof_namespace_index
  nvdimm: Sanity check labeloff
  libnvdimm, dimm: Maximize label transfer size
  libnvdimm, pmem: Fix badblocks population for 'raw' namespaces
  libnvdimm, namespace: Drop the repeat assignment for variable dev->parent
  libnvdimm, region: Fail badblocks listing for inactive regions
  libnvdimm, pfn: during init, clear errors in the metadata area
  libnvdimm: Set device node in nd_device_register
  libnvdimm: Hold reference on parent while scheduling async init
  ...

Pull power supply and reset updates from Sebastian Reichel:

 - Add Spreadtrum SC2731 charger driver

 - bq25890-charger: Add BQ25896 support

 - bq27xxx-battery: Add support for BQ27411

 - qcom-pon: Add pms405 pon support

 - cros-charger: add support for dedicated port

 - misc fixes

* tag 'for-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (28 commits)
  power: max8925: mark expected switch fall-through
  power: supply: fix spelling mistake "Gauage" -> "Gauge"
  power: reset: qcom-pon: Add pms405 pon support
  power: supply: bq27xxx: Add support for BQ27411
  power: supply: Add Spreadtrum SC2731 charger support
  dt-bindings: power: Add Spreadtrum SC2731 charger documentation
  power: supply: twl4030_charger: disable eoc interrupt on linear charge
  power: supply: twl4030_charger: fix charging current out-of-bounds
  power: supply: bq25890_charger: fix semicolon.cocci warnings
  power: supply: max8998-charger: Fix platform data retrieval
  power: supply: cros: add support for dedicated port
  mfd: cros: add charger port count command definition
  power: reset: at91-poweroff: do not procede if at91_shdwc is allocated
  power: reset: at91-poweroff: rename at91_shdwc_base member of struct shdwc
  power: reset: at91-poweroff: make sclk part of struct shdwc
  power: reset: at91-poweroff: make mpddrc_base part of struct shdwc
  power: reset: at91-poweroff: use only one poweroff function
  power: reset: at91-poweroff: switch to slow clock before shutdown
  power: reset: convert to SPDX identifiers
  power: supply: ab8500_fg: silence uninitialized variable warnings
  ...

Pull HID updates from Jiri Kosina:

 - rumble support for Xbox One S, from Andrey Smirnov

 - high-resolution support for Logitech mice, from Harry Cutts

 - support for recent devices requiring the HID parse to be able to cope
   with tag report sizes > 256

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (35 commits)
  HID: usbhid: Add quirk for Redragon/Dragonrise Seymur 2
  HID: wacom: Work around HID descriptor bug in DTK-2451 and DTH-2452
  HID: google: add dependency on Cros EC for Hammer
  HID: elan: fix spelling mistake "registred" -> "registered"
  HID: google: drop superfluous const before SIMPLE_DEV_PM_OPS()
  HID: google: add support tablet mode switch for Whiskers
  mfd: cros: add "base attached" MKBP switch definition
  Input: reserve 2 events code because of HID
  HID: magicmouse: add support for Apple Magic Trackpad 2
  HID: i2c-hid: override HID descriptors for certain devices
  HID: hid-bigbenff: driver for BigBen Interactive PS3OFMINIPAD gamepad
  HID: logitech: fix a used uninitialized GCC warning
  HID: intel-ish-hid: using list_head for ipc write queue
  HID: intel-ish-hid: use resource-managed api
  HID: intel_ish-hid: Enhance API to get ring buffer sizes
  HID: intel-ish-hid: use helper function to search client id
  HID: intel-ish-hid: ishtp: add helper function for client search
  HID: intel-ish-hid: use helper function to access client buffer
  HID: intel-ish-hid: ishtp: add helper functions for client buffer operation
  HID: intel-ish-hid: use helper function for private driver data set/get
  ...

Pull backlight updates from Lee Jones:
 "Old Drivers
   - Remove driver for S6E63M0
   - Remove driver for LD9040

  Fix-ups
   - Trivial (email address update); adp*_bl
   - Use 'atomic' PWM API; pwm_bl

  Bug Fixes
   - Remove pointless boolen '&ptr' check; lm3639_bl"

* tag 'backlight-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: Remove ld9040 driver
  backlight: Remove s6e63m0 driver
  backlight: lm3639: Unconditionally call led_classdev_unregister
  backlight: pwm_bl: Switch to using "atomic" PWM API
  backlight: Update MODULE AUTHOR email address

Pull MFD updates from Lee Jones:
 "New Drivers
   - Add support for USART SPI to AT91*

  New Functionality
   - Add support for Audio CODECs to motorola-cpcap

  Fix-ups
   - DT documentation fix-ups; atmel-usart
   - Staticise functions/structs; spi-at91-usart, arizona-core
   - Constify; ti-lmu
   - Fix memory leaks; menelaus
   - Change device 'wake-up' status; ti_am335x_tscadc, max8997
   - Power Management (suspend/resume) semantic changes; ti_am335x_adc, cros_ec, max8997
   - SPDX churn; sec-core (+ headers), max* (+ headers), intel* (+ headers),
   - Trivial (whitespace, email addresses, alphabetisise); Kconfig, adp5520, intel_soc_pmic_*
   - Build as module; sec-irq
   - Use new %pOFn printk format for device_node.name; max77620
   - Remove unused code; madera
   - Use generic MACROs; intel_msic, intel_soc_pmic_crc
   - Move to GPIOD; ti-lmu
   - Use managed resources; ti-lmu

  Bug Fixes
   - Add missing headers; at91-usart
   - Prevent device from entering low-power mode; arizona-core
   - Poll for BOOT_DONE to avoid still-booting NACK; madera-core
   - Prevent ADC read from shutting down device; mc13xxx-core"

* tag 'mfd-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (45 commits)
  mfd: cros_ec: Avoid unneeded internal declaration warning
  mfd: ti-lmu: Use of_device_get_match_data() helper
  mfd: ti-lmu: Use managed resource for everything
  mfd: ti-lmu: Switch to GPIOD
  mfd: ti-lmu: constify mfd_cell tables
  mfd: max8997: Disable interrupt handling for suspend/resume cycle
  mfd: max8997: Enale irq-wakeup unconditionally
  mfd: arizona: Make array mclk_name static, shrinks object size
  MAINTAINERS: Add myself as designated reviewer of Intel MFD PMIC
  mfd: Convert Intel PMIC drivers to use SPDX identifier 1;5201;0c Reduce size of duplicated comments by switching to use SPDX identifier.
  mfd: Sort headers alphabetically for Intel PMIC drivers
  mfd: intel_soc_pmic_bxtwc: Chain power button IRQs as well
  mfd: intel_soc_pmic_crc: Use REGMAP_IRQ_REG() macro
  mfd: intel_soc_pmic_crc: Use DEFINE_RES_IRQ_NAMED() macro
  mfd: intel_msic: Use DEFINE_RES_IRQ() macro
  mfd: motorola-cpcap: Add audio-codec support
  mfd: mc13xxx-core: Fix PMIC shutdown when reading ADC values
  mfd: madera: Remove unused forward reference
  mfd: max77620: Convert to using %pOFn instead of device_node.name
  mfd: madera: Don't use regmap_read_poll_timeout to poll for BOOT_DONE
  ...

Pull documentation updates from Jonathan Corbet:
 "This is a fairly typical cycle for documentation. There's some welcome
  readability improvements for the formatted output, some LICENSES
  updates including the addition of the ISC license, the removal of the
  unloved and unmaintained 00-INDEX files, the deprecated APIs document
  from Kees, more MM docs from Mike Rapoport, and the usual pile of typo
  fixes and corrections"

* tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits)
  docs: Fix typos in histogram.rst
  docs: Introduce deprecated APIs list
  kernel-doc: fix declaration type determination
  doc: fix a typo in adding-syscalls.rst
  docs/admin-guide: memory-hotplug: remove table of contents
  doc: printk-formats: Remove bogus kobject references for device nodes
  Documentation: preempt-locking: Use better example
  dm flakey: Document "error_writes" feature
  docs/completion.txt: Fix a couple of punctuation nits
  LICENSES: Add ISC license text
  LICENSES: Add note to CDDL-1.0 license that it should not be used
  docs/core-api: memory-hotplug: add some details about locking internals
  docs/core-api: rename memory-hotplug-notifier to memory-hotplug
  docs: improve readability for people with poorer eyesight
  yama: clarify ptrace_scope=2 in Yama documentation
  docs/vm: split memory hotplug notifier description to Documentation/core-api
  docs: move memory hotplug description into admin-guide/mm
  doc: Fix acronym "FEKEK" in ecryptfs
  docs: fix some broken documentation references
  iommu: Fix passthrough option documentation
  ...

Pull ext4 updates from Ted Ts'o:

 - further restructure ext4 documentation

 - fix up ext4's delayed allocation for bigalloc file systems

 - fix up some syzbot-detected races in EXT4_IOC_MOVE_EXT,
   EXT4_IOC_SWAP_BOOT, and ext4_remount

 - ... and a few other miscellaneous bugs and optimizations.

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (21 commits)
  ext4: fix use-after-free race in ext4_remount()'s error path
  ext4: cache NULL when both default_acl and acl are NULL
  docs: promote the ext4 data structures book to top level
  docs: move ext4 administrative docs to admin-guide/
  jbd2: fix use after free in jbd2_log_do_checkpoint()
  ext4: propagate error from dquot_initialize() in EXT4_IOC_FSSETXATTR
  ext4: fix setattr project check in fssetxattr ioctl
  docs: make ext4 readme tables readable
  docs: fix ext4 documentation table formatting problems
  docs: generate a separate ext4 pdf file from the documentation
  ext4: convert fault handler to use vm_fault_t type
  ext4: initialize retries variable in ext4_da_write_inline_data_begin()
  ext4: fix EXT4_IOC_SWAP_BOOT
  ext4: fix build error when DX_DEBUG is defined
  ext4: fix argument checking in EXT4_IOC_MOVE_EXT
  ext4: fix reserved cluster accounting at page invalidation time
  ext4: adjust reserved cluster count when removing extents
  ext4: reduce reserved cluster count by number of allocated clusters
  ext4: fix reserved cluster accounting at delayed write time
  ext4: add new pending reservation mechanism
  ...

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've added 1) superblock checksum feature, 2)
  implemented new mount option which we can disable/enable checkpoint to
  provide atomic updates of entire filesystem, 3) refactored quota
  operations to enhance its consistency along with checkpoint, 4) fixed
  subtle IO hang conditions and roll-forward recovery flow to resurrect
  any fsync'ed inode metadata.

  Enhancements:
   - add checksum to keep superblock contents more safe
   - add checkpoint=disable/enable to support A/B update of entire filesystem
   - use plug for readahead IO in readdir
   - add more IO counts to avoid block layer hacks

  Bug fixes:
   - prevent data corruption issue for hardware encryption
   - fix IO hang issues when GC is heavily triggered
   - add missing up_read in __write_node_page
   - recover inode metadata during roll-forward recovery flow
   - fix null pointer dereference issue in wrongly configured discard map

  There are some more sanity checks and minor bug fixes as well"

* tag 'f2fs-for-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (62 commits)
  f2fs: fix to keep project quota consistent
  f2fs: guarantee journalled quota data by checkpoint
  f2fs: cleanup dirty pages if recover failed
  f2fs: fix data corruption issue with hardware encryption
  f2fs: fix to recover inode->i_flags of inode block during POR
  f2fs: spread f2fs_set_inode_flags()
  f2fs: fix to spread clear_cold_data()
  Revert "f2fs: fix to clear PG_checked flag in set_page_dirty()"
  f2fs: account read IOs and use IO counts for is_idle
  f2fs: fix to account IO correctly for cgroup writeback
  f2fs: fix to account IO correctly
  f2fs: remove request_list check in is_idle()
  f2fs: allow to mount, if quota is failed
  f2fs: update REQ_TIME in f2fs_cross_rename()
  f2fs: do not update REQ_TIME in case of error conditions
  f2fs: remove unneeded disable_nat_bits()
  f2fs: remove unused sbi->trigger_ssr_threshold
  f2fs: shrink sbi->sb_lock coverage in set_file_temperature()
  f2fs: use rb_*_cached friends
  f2fs: fix to recover cold bit of inode block during POR
  ...

Pul xfs updates from Dave Chinner:
 "There's not a huge amount of change in this cycle - Darrick has been
  out of action for a couple of months (hence me sending the last few
  pull requests), so we decided a quiet cycle mainly focussed on bug
  fixes was a good idea. Darrick will take the helm again at the end of
  this merge window.

  FYI, I may be sending another update later in the cycle - there's a
  pending rework of the clone/dedupe_file_range code that fixes numerous
  bugs that is spread amongst the VFS, XFS and ocfs2 code. It has been
  reviewed and tested, Al and I just need to work out the details of the
  merge, so it may come from him rather than me.

  Summary:

   - only support filesystems with unwritten extents

   - add definition for statfs XFS magic number

   - remove unused parameters around reflink code

   - more debug for dangling delalloc extents

   - cancel COW extents on extent swap targets

   - fix quota stats output and clean up the code

   - refactor some of the attribute code in preparation for parent
     pointers

   - fix several buffer handling bugs"

* tag 'xfs-4.20-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (21 commits)
  xfs: cancel COW blocks before swapext
  xfs: clear ail delwri queued bufs on unmount of shutdown fs
  xfs: use offsetof() in place of offset macros for __xfsstats
  xfs: Fix xqmstats offsets in /proc/fs/xfs/xqmstat
  xfs: fix use-after-free race in xfs_buf_rele
  xfs: Add attibute remove and helper functions
  xfs: Add attibute set and helper functions
  xfs: Add helper function xfs_attr_try_sf_addname
  xfs: Move fs/xfs/xfs_attr.h to fs/xfs/libxfs/xfs_attr.h
  xfs: issue log message on user force shutdown
  xfs: fix buffer state management in xrep_findroot_block
  xfs: always assign buffer verifiers when one is provided
  xfs: xrep_findroot_block should reject root blocks with siblings
  xfs: add a define for statfs magic to uapi
  xfs: print dangling delalloc extents
  xfs: fix fork selection in xfs_find_trim_cow_extent
  xfs: remove the unused trimmed argument from xfs_reflink_trim_around_shared
  xfs: remove the unused shared argument to xfs_reflink_reserve_cow
  xfs: handle zeroing in xfs_file_iomap_begin_delay
  xfs: remove suport for filesystems without unwritten extent flag
  ...

Pull gfs2 updates from Bob Peterson:
 "We've got 18 patches for this merge window, none of which are very
  major:

   - clean up the gfs2 block allocator to prepare for future performance
     enhancements (Andreas Gruenbacher)

   - fix a use-after-free problem (Andy Price)

   - patches that fix gfs2's broken rgrplvb mount option (me)

   - cleanup patches and error message improvements (me)

   - enable getlabel support (Steve Whitehouse and Abhi Das)

   - flush the glock delete workqueue at exit (Tim Smith)"

* tag 'gfs2-4.20.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix minor typo: couln't versus couldn't.
  gfs2: write revokes should traverse sd_ail1_list in reverse
  gfs2: Pass resource group to rgblk_free
  gfs2: Remove unnecessary gfs2_rlist_alloc parameter
  gfs2: Fix marking bitmaps non-full
  gfs2: Fix some minor typos
  gfs2: Rename bitmap.bi_{len => bytes}
  gfs2: Remove unused RGRP_RSRV_MINBYTES definition
  gfs2: Move rs_{sizehint, rgd_gh} fields into the inode
  gfs2: Clean up out-of-bounds check in gfs2_rbm_from_block
  gfs2: Always check the result of gfs2_rbm_from_block
  gfs2: getlabel support
  GFS2: Flush the GFS2 delete workqueue before stopping the kernel threads
  gfs2: Don't leave s_fs_info pointing to freed memory in init_sbd
  gfs2: Use fs_* functions instead of pr_* function where we can
  gfs2: slow the deluge of io error messages
  gfs2: Don't set GFS2_RDF_UPTODATE when the lvb is updated
  gfs2: improve debug information when lvb mismatches are found

Pull orangefs updates from Mike Marshall:
 "Fixes and a cleanup.

  Fixes:
   - fix superfluous service_operation return code check in
     orangefs_lookup
   - fix some error code paths that missed kmem_cache_free
   - don't let orangefs_iget return NULL
   - don't let orangefs_new_inode return NULL
   - cache NULL when both default_acl and acl are NULL

 Cleanup:
   - rate limit the client not running info message"

* tag 'for-linus-4.20-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: no need to check for service_operation returns > 0
  orangefs: some error code paths missed kmem_cache_free
  orangefs: don't let orangefs_iget return NULL.
  orangefs: don't let orangefs_new_inode return NULL
  orangefs: rate limit the client not running info message
  orangefs: cache NULL when both default_acl and acl are NULL

Pull vfs fixes from Al Viro.

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  gfs2_meta: ->mount() can get NULL dev_name
  ecryptfs_rename(): verify that lower dentries are still OK after lock_rename()
  cachefiles: fix the race between cachefiles_bury_object() and rmdir(2)

Pull jfs updates from David Kleikamp:
 "Just a few small fixes"

* tag 'jfs-for-4.20' of git://github.com/kleikamp/linux-shaggy:
  jfs: remove redundant dquot_initialize() in jfs_evict_inode()
  jfs: remove quota option from ignore list
  jfs: cache NULL when both default_acl and acl are NULL

Pull btrfs updates from David Sterba:
 "This is the first batch with fixes and some nice performance
  improvements.

  Preliminary results show eg. more files/sec in fsmark, better perf on
  multi-threaded workloads (filebench, dbench), fewer context switches
  and overall better memory allocation characteristics (multiple
  benchmarks).

  Apart from general performance, there's an improvement for qgroups +
  balance workload that's been troubling our users.

  Note for stable: there are 20+ patches tagged for stable, out of 90.
  Not all of them apply cleanly on all stable versions but the conflicts
  are mostly due to simple cleanups and resolving should be obvious. The
  fixes are otherwise independent.

  Performance improvements:

   - transition between blocking and spinning modes of path is gone,
     which originally resulted to more unnecessary wakeups and updates
     to the path locks, the effects are measurable and improve latency
     and scalability

   - qgroups: first batch of changes that should speedup balancing with
     qgroups on, skip quota accounting on unchanged subtrees, overall
     gain is about 30+% in runtime

   - use rb-tree with cached first node for several structures, small
     improvement to avoid pointer chasing

  Fixes:

   - trim
      - fix: some blockgroups could have been missed if their logical
        address was past the total filesystem size (ie. after a lot of
        balancing)
      - better error reporting, after processing blockgroups and whole
        device
      - fix: continue trimming block groups after an error is
        encountered
      - check for trim support of the device earlier and avoid some
        unnecessary work
      - less interaction with transaction commit that improves latency
        on slower storage (eg. image files over NFS)

   - fsync
      - fix warning when replaying log after fsync of a O_TMPFILE
      - fix wrong dentries after fsync of file that got its parent
        replaced

   - qgroups: fix rescan that might misc some dirty groups

   - don't clean dirty pages during buffered writes, this could lead to
     lost updates in some corner cases

   - some block groups could have been delayed in creation, if the
     allocation triggered another one

   - error handling improvements

  Cleanups:

   - removed unused struct members and variables

   - function return type cleanups

   - delayed refs code refactoring

   - protect against deadlock that could be caused by crafted image that
     tries to allocate from a tree that's locked already"

* tag 'for-4.20-part1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (93 commits)
  btrfs: switch return_bigger to bool in find_ref_head
  btrfs: remove fs_info from btrfs_should_throttle_delayed_refs
  btrfs: remove fs_info from btrfs_check_space_for_delayed_refs
  btrfs: delayed-ref: pass delayed_refs directly to btrfs_delayed_ref_lock
  btrfs: delayed-ref: pass delayed_refs directly to btrfs_select_ref_head
  btrfs: qgroup: move the qgroup->members check out from (!qgroup)'s else branch
  btrfs: relocation: Remove redundant tree level check
  btrfs: relocation: Cleanup while loop using rbtree_postorder_for_each_entry_safe
  btrfs: qgroup: Avoid calling qgroup functions if qgroup is not enabled
  Btrfs: fix wrong dentries after fsync of file that got its parent replaced
  Btrfs: fix warning when replaying log after fsync of a tmpfile
  btrfs: drop min_size from evict_refill_and_join
  btrfs: assert on non-empty delayed iputs
  btrfs: make sure we create all new block groups
  btrfs: reset max_extent_size on clear in a bitmap
  btrfs: protect space cache inode alloc with GFP_NOFS
  btrfs: release metadata before running delayed refs
  Btrfs: kill btrfs_clear_path_blocking
  btrfs: dev-replace: remove pointless assert in write unlock
  btrfs: dev-replace: move replace members out of fs_info
  ...

Pull tty ioctl updates from Al Viro:
 "This is the compat_ioctl work related to tty ioctls.

  Quite a bit of dead code taken out, all tty-related stuff gone from
  fs/compat_ioctl.c. A bunch of compat bugs fixed - some still remain,
  but all more or less generic tty-related ioctls should be covered
  (remaining issues are in things like driver-private ioctls in a pcmcia
  serial card driver not getting properly handled in 32bit processes on
  64bit host, etc)"

* 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (53 commits)
  kill TIOCSERGSTRUCT
  change semantics of ldisc ->compat_ioctl()
  kill TIOCSER[SG]WILD
  synclink_gt(): fix compat_ioctl()
  pty: fix compat ioctls
  compat_ioctl - kill keyboard ioctl handling
  gigaset: add ->compat_ioctl()
  vt_compat_ioctl(): clean up, use compat_ptr() properly
  gigaset: don't try to printk userland buffer contents
  dgnc: don't bother with (empty) stub for TCXONC
  dgnc: leave TIOC[GS]SOFTCAR to ldisc
  remove fallback to drivers for TIOCGICOUNT
  dgnc: break-related ioctls won't reach ->ioctl()
  kill the rest of tty COMPAT_IOCTL() entries
  dgnc: TIOCM... won't reach ->ioctl()
  isdn_tty: TCSBRK{,P} won't reach ->ioctl()
  kill capinc_tty_ioctl()
  take compat TIOC[SG]SERIAL treatment into tty_compat_ioctl()
  synclink: reduce pointless checks in ->ioctl()
  complete ->[sg]et_serial() switchover
  ...

Pull pstore updates from Kees Cook:
 "pstore improvements:

   - refactor init to happen as early as possible again (Joel Fernandes)

   - improve resource reservation names"

* tag 'pstore-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore/ram: Clarify resource reservation labels
  pstore: Refactor compression initialization
  pstore: Allocate compression during late_initcall()
  pstore: Centralize init/exit routines

Pull security subsystem updates from James Morris:
 "In this patchset, there are a couple of minor updates, as well as some
  reworking of the LSM initialization code from Kees Cook (these prepare
  the way for ordered stackable LSMs, but are a valuable cleanup on
  their own)"

* 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  LSM: Don't ignore initialization failures
  LSM: Provide init debugging infrastructure
  LSM: Record LSM name in struct lsm_info
  LSM: Convert security_initcall() into DEFINE_LSM()
  vmlinux.lds.h: Move LSM_TABLE into INIT_DATA
  LSM: Convert from initcall to struct lsm_info
  LSM: Remove initcall tracing
  LSM: Rename .security_initcall section to .lsm_info
  vmlinux.lds.h: Avoid copy/paste of security_init section
  LSM: Correctly announce start of LSM initialization
  security: fix LSM description location
  keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h
  seccomp: remove unnecessary unlikely()
  security: tomoyo: Fix obsolete function
  security/capabilities: remove check for -EINVAL

Pull SELinux updates from Paul Moore:
 "Three SELinux patches for v4.20, all fall under the bug-fix or
  behave-better category, which is good. All three have pretty good
  descriptions too, which is even better"

* tag 'selinux-pr-20181022' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: Add __GFP_NOWARN to allocation at str_read()
  selinux: refactor mls_context_to_sid() and make it stricter
  selinux: fix mounting of cgroup2 under older policies

Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull siginfo updates from Eric Biederman:
 "I have been slowly sorting out siginfo and this is the culmination of
  that work.

  The primary result is in several ways the signal infrastructure has
  been made less error prone. The code has been updated so that manually
  specifying SEND_SIG_FORCED is never necessary. The conversion to the
  new siginfo sending functions is now complete, which makes it
  difficult to send a signal without filling in the proper siginfo
  fields.

  At the tail end of the patchset comes the optimization of decreasing
  the size of struct siginfo in the kernel from 128 bytes to about 48
  bytes on 64bit. The fundamental observation that enables this is by
  definition none of the known ways to use struct siginfo uses the extra
  bytes.

  This comes at the cost of a small user space observable difference.
  For the rare case of siginfo being injected into the kernel only what
  can be copied into kernel_siginfo is delivered to the destination, the
  rest of the bytes are set to 0. For cases where the signal and the
  si_code are known this is safe, because we know those bytes are not
  used. For cases where the signal and si_code combination is unknown
  the bits that won't fit into struct kernel_siginfo are tested to
  verify they are zero, and the send fails if they are not.

  I made an extensive search through userspace code and I could not find
  anything that would break because of the above change. If it turns out
  I did break something it will take just the revert of a single change
  to restore kernel_siginfo to the same size as userspace siginfo.

  Testing did reveal dependencies on preferring the signo passed to
  sigqueueinfo over si->signo, so bit the bullet and added the
  complexity necessary to handle that case.

  Testing also revealed bad things can happen if a negative signal
  number is passed into the system calls. Something no sane application
  will do but something a malicious program or a fuzzer might do. So I
  have fixed the code that performs the bounds checks to ensure negative
  signal numbers are handled"

* 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (80 commits)
  signal: Guard against negative signal numbers in copy_siginfo_from_user32
  signal: Guard against negative signal numbers in copy_siginfo_from_user
  signal: In sigqueueinfo prefer sig not si_signo
  signal: Use a smaller struct siginfo in the kernel
  signal: Distinguish between kernel_siginfo and siginfo
  signal: Introduce copy_siginfo_from_user and use it's return value
  signal: Remove the need for __ARCH_SI_PREABLE_SIZE and SI_PAD_SIZE
  signal: Fail sigqueueinfo if si_signo != sig
  signal/sparc: Move EMT_TAGOVF into the generic siginfo.h
  signal/unicore32: Use force_sig_fault where appropriate
  signal/unicore32: Generate siginfo in ucs32_notify_die
  signal/unicore32: Use send_sig_fault where appropriate
  signal/arc: Use force_sig_fault where appropriate
  signal/arc: Push siginfo generation into unhandled_exception
  signal/ia64: Use force_sig_fault where appropriate
  signal/ia64: Use the force_sig(SIGSEGV,...) in ia64_rt_sigreturn
  signal/ia64: Use the generic force_sigsegv in setup_frame
  signal/arm/kvm: Use send_sig_mceerr
  signal/arm: Use send_sig_fault where appropriate
  signal/arm: Use force_sig_fault where appropriate
  ...

The networking merge brought in the experimental support for the
Qualcomm ath10k system NOC, which selects QCOM_QMI_HELPERS as a
dependency.

But the ATH10K_SNOC option (which selects QCOM_QMI_HELPERS) depends on
ARCH_QCOM || COMPILE_TEST in order to get wider build testing than just
the unusual QCOM architecture build, while the QCOM_QMI_HELPERS option
doesn't have that COMPILE_TEST option and is limited to only ARCH_QCOM.

As a result, a "make allmodconfig" complains

  WARNING: unmet direct dependencies detected for QCOM_QMI_HELPERS
    Depends on [n]: ARCH_QCOM && NET [=y]
    Selected by [m]:
    - ATH10K_SNOC [=m] && NETDEVICES [=y] && WLAN [=y] && WLAN_VENDOR_ATH [=y] && ATH10K [=m] && (ARCH_QCOM || COMPILE_TEST [=y])

Fix the config-time warning by making QCOM_QMI_HELPERS available when
COMPILE_TEST, since the result seems to build fine.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Govind Singh <govinds@codeaurora.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>