Pull arm64 and cross-arch updates from Catalin Marinas:
 "Here's a slightly wider-spread set of updates for 5.9.

  Going outside the usual arch/arm64/ area is the removal of
  read_barrier_depends() series from Will and the MSI/IOMMU ID
  translation series from Lorenzo.

  The notable arm64 updates include ARMv8.4 TLBI range operations and
  translation level hint, time namespace support, and perf.

  Summary:

   - Removal of the tremendously unpopular read_barrier_depends()
     barrier, which is a NOP on all architectures apart from Alpha, in
     favour of allowing architectures to override READ_ONCE() and do
     whatever dance they need to do to ensure address dependencies
     provide LOAD -> LOAD/STORE ordering.

     This work also offers a potential solution if compilers are shown
     to convert LOAD -> LOAD address dependencies into control
     dependencies (e.g. under LTO), as weakly ordered architectures will
     effectively be able to upgrade READ_ONCE() to smp_load_acquire().
     The latter case is not used yet, but will be discussed further at
     LPC.

   - Make the MSI/IOMMU input/output ID translation PCI agnostic,
     augment the MSI/IOMMU ACPI/OF ID mapping APIs to accept an input ID
     bus-specific parameter and apply the resulting changes to the
     device ID space provided by the Freescale FSL bus.

   - arm64 support for TLBI range operations and translation table level
     hints (part of the ARMv8.4 architecture version).

   - Time namespace support for arm64.

   - Export the virtual and physical address sizes in vmcoreinfo for
     makedumpfile and crash utilities.

   - CPU feature handling cleanups and checks for programmer errors
     (overlapping bit-fields).

   - ACPI updates for arm64: disallow AML accesses to EFI code regions
     and kernel memory.

   - perf updates for arm64.

   - Miscellaneous fixes and cleanups, most notably PLT counting
     optimisation for module loading, recordmcount fix to ignore
     relocations other than R_AARCH64_CALL26, CMA areas reserved for
     gigantic pages on 16K and 64K configurations.

   - Trivial typos, duplicate words"

Link: http://lkml.kernel.org/r/20200710165203.31284-1-will@kernel.org
Link: http://lkml.kernel.org/r/20200619082013.13661-1-lorenzo.pieralisi@arm.com

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (82 commits)
  arm64: use IRQ_STACK_SIZE instead of THREAD_SIZE for irq stack
  arm64/mm: save memory access in check_and_switch_context() fast switch path
  arm64: sigcontext.h: delete duplicated word
  arm64: ptrace.h: delete duplicated word
  arm64: pgtable-hwdef.h: delete duplicated words
  bus: fsl-mc: Add ACPI support for fsl-mc
  bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver
  of/irq: Make of_msi_map_rid() PCI bus agnostic
  of/irq: make of_msi_map_get_device_domain() bus agnostic
  dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus
  of/device: Add input id to of_dma_configure()
  of/iommu: Make of_map_rid() PCI agnostic
  ACPI/IORT: Add an input ID to acpi_dma_configure()
  ACPI/IORT: Remove useless PCI bus walk
  ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
  ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic
  ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC
  arm64: enable time namespace support
  arm64/vdso: Restrict splitting VVAR VMA
  arm64/vdso: Handle faults on timens page
  ...

Pull m68k updates from Geert Uytterhoeven:

 - several Kbuild improvements

 - several Mac fixes

 - minor cleanups and fixes

 - defconfig updates

* tag 'm68k-for-v5.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: defconfig: Update defconfigs for v5.8-rc3
  m68k: Use CLEAN_FILES to clean up files
  m68k: mac: Improve IOP debug messages
  m68k: mac: Don't send uninitialized data in IOP message reply
  m68k: mac: Fix IOP status/control register writes
  m68k: mac: Don't send IOP message until channel is idle
  m68k: atari: Annotate dummy read in ROM port IO code as __maybe_unused
  m68k: Use sizeof_field() helper
  m68k: Pass -D options to KBUILD_CPPFLAGS instead of KBUILD_{A,C}FLAGS
  m68k: Optimize cc-option calls for cpuflags-y
  m68k: sun3: Descend to prom from arch/m68k/sun3
  m68k: Add arch/m68k/Kbuild

Pull unicore32 removal from Mike Rapoport:
 "Remove unicore32 support.

  The unicore32 port do not seem maintained for a long time now, there
  is no upstream toolchain that can create unicore32 binaries and all
  the links to prebuilt toolchains for unicore32 are dead. Even
  compilers that were available are not supported by the kernel anymore.

  Guenter Roeck says:
    "I have stopped building unicore32 images since v4.19 since there is
     no available compiler that is still supported by the kernel. I am
     surprised that support for it has not been removed from the kernel"

  However, it's worth pointing out two things:

   - Guan Xuetao is still listed as maintainer and asked for the port to
     be kept around the last time Arnd suggested removing it two years
     ago. He promised that there would be compiler sources (presumably
     llvm), but has not made those available since.

   - https://github.com/gxt has patches to linux-4.9 and qemu-2.7, both
     released in 2016, with patches dated early 2019. These patches
     mainly restore a syscall ABI that was never part of mainline Linux
     but apparently used in production. qemu-2.8 removed support for
     that ABI and newer kernels (4.19+) can no longer be built with the
     old toolchain, so apparently there will not be any future updates
     to that git tree"

* tag 'rm-unicore32' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux:
  MAINTAINERS: remove "PKUNITY SOC DRIVERS" entry
  rtc: remove fb-puv3  driver
  video: fbdev: remove fb-puv3  driver
  pwm: remove pwm-puv3  driver
  input: i8042: remove support for 8042-unicore32io
  i2c/buses: remove i2c-puv3  driver
  cpufreq: remove unicore32 driver
  arch: remove unicore32 port

Pull s390 updates from Heiko Carstens:

 - Add support for function error injection.

 - Add support for custom exception handlers, as required by
   BPF_PROBE_MEM.

 - Add support for BPF_PROBE_MEM.

 - Add trace events for idle enter / exit for the s390 specific idle
   implementation.

 - Remove unused zcore memmmap device.

 - Remove unused "raw view" from s390 debug feature.

 - AP bus + zcrypt device driver code refactoring.

 - Provide cex4 cca sysfs attributes for cex3 for zcrypt device driver.

 - Expose only minimal interface to walk physmem for mm/memblock. This
   is a common code change and it has been agreed on with Mike Rapoport
   and Andrew Morton that this can go upstream via the s390 tree.

 - Rework of the s390 vmem/vmmemap code to allow for future memory hot
   remove.

 - Get rid of FORCE_MAX_ZONEORDER to finally allow for order-10
   allocations again, instead of only order-8 allocations.

 - Various small improvements and fixes.

* tag 's390-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (48 commits)
  s390/vmemmap: coding style updates
  s390/vmemmap: avoid memset(PAGE_UNUSED) when adding consecutive sections
  s390/vmemmap: remember unused sub-pmd ranges
  s390/vmemmap: fallback to PTEs if mapping large PMD fails
  s390/vmem: cleanup empty page tables
  s390/vmemmap: take the vmem_mutex when populating/freeing
  s390/vmemmap: cleanup when vmemmap_populate() fails
  s390/vmemmap: extend modify_pagetable() to handle vmemmap
  s390/vmem: consolidate vmem_add_range() and vmem_remove_range()
  s390/vmem: rename vmem_add_mem() to vmem_add_range()
  s390: enable HAVE_FUNCTION_ERROR_INJECTION
  s390/pci: clarify comment in s390_mmio_read/write
  s390/time: improve comparison for tod steering
  s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE
  s390/time: use CLOCKSOURCE_MASK
  s390/bpf: implement BPF_PROBE_MEM
  s390/kernel: expand exception table logic to allow new handling options
  s390/kernel: unify EX_TABLE* implementations
  s390/mm: allow order 10 allocations
  s390/mm: avoid trimming to MAX_ORDER
  ...

Pull io_uring updates from Jens Axboe:
 "Lots of cleanups in here, hardening the code and/or making it easier
  to read and fixing bugs, but a core feature/change too adding support
  for real async buffered reads. With the latter in place, we just need
  buffered write async support and we're done relying on kthreads for
  the fast path. In detail:

   - Cleanup how memory accounting is done on ring setup/free (Bijan)

   - sq array offset calculation fixup (Dmitry)

   - Consistently handle blocking off O_DIRECT submission path (me)

   - Support proper async buffered reads, instead of relying on kthread
     offload for that. This uses the page waitqueue to drive retries
     from task_work, like we handle poll based retry. (me)

   - IO completion optimizations (me)

   - Fix race with accounting and ring fd install (me)

   - Support EPOLLEXCLUSIVE (Jiufei)

   - Get rid of the io_kiocb unionizing, made possible by shrinking
     other bits (Pavel)

   - Completion side cleanups (Pavel)

   - Cleanup REQ_F_ flags handling, and kill off many of them (Pavel)

   - Request environment grabbing cleanups (Pavel)

   - File and socket read/write cleanups (Pavel)

   - Improve kiocb_set_rw_flags() (Pavel)

   - Tons of fixes and cleanups (Pavel)

   - IORING_SQ_NEED_WAKEUP clear fix (Xiaoguang)"

* tag 'for-5.9/io_uring-20200802' of git://git.kernel.dk/linux-block: (127 commits)
  io_uring: flip if handling after io_setup_async_rw
  fs: optimise kiocb_set_rw_flags()
  io_uring: don't touch 'ctx' after installing file descriptor
  io_uring: get rid of atomic FAA for cq_timeouts
  io_uring: consolidate *_check_overflow accounting
  io_uring: fix stalled deferred requests
  io_uring: fix racy overflow count reporting
  io_uring: deduplicate __io_complete_rw()
  io_uring: de-unionise io_kiocb
  io-wq: update hash bits
  io_uring: fix missing io_queue_linked_timeout()
  io_uring: mark ->work uninitialised after cleanup
  io_uring: deduplicate io_grab_files() calls
  io_uring: don't do opcode prep twice
  io_uring: clear IORING_SQ_NEED_WAKEUP after executing task works
  io_uring: batch put_task_struct()
  tasks: add put_task_struct_many()
  io_uring: return locked and pinned page accounting
  io_uring: don't miscount pinned memory
  io_uring: don't open-code recv kbuf managment
  ...

Pull core block updates from Jens Axboe:
 "Good amount of cleanups and tech debt removals in here, and as a
  result, the diffstat shows a nice net reduction in code.

   - Softirq completion cleanups (Christoph)

   - Stop using ->queuedata (Christoph)

   - Cleanup bd claiming (Christoph)

   - Use check_events, moving away from the legacy media change
     (Christoph)

   - Use inode i_blkbits consistently (Christoph)

   - Remove old unused writeback congestion bits (Christoph)

   - Cleanup/unify submission path (Christoph)

   - Use bio_uninit consistently, instead of bio_disassociate_blkg
     (Christoph)

   - sbitmap cleared bits handling (John)

   - Request merging blktrace event addition (Jan)

   - sysfs add/remove race fixes (Luis)

   - blk-mq tag fixes/optimizations (Ming)

   - Duplicate words in comments (Randy)

   - Flush deferral cleanup (Yufen)

   - IO context locking/retry fixes (John)

   - struct_size() usage (Gustavo)

   - blk-iocost fixes (Chengming)

   - blk-cgroup IO stats fixes (Boris)

   - Various little fixes"

* tag 'for-5.9/block-20200802' of git://git.kernel.dk/linux-block: (135 commits)
  block: blk-timeout: delete duplicated word
  block: blk-mq-sched: delete duplicated word
  block: blk-mq: delete duplicated word
  block: genhd: delete duplicated words
  block: elevator: delete duplicated word and fix typos
  block: bio: delete duplicated words
  block: bfq-iosched: fix duplicated word
  iocost_monitor: start from the oldest usage index
  iocost: Fix check condition of iocg abs_vdebt
  block: Remove callback typedefs for blk_mq_ops
  block: Use non _rcu version of list functions for tag_set_list
  blk-cgroup: show global disk stats in root cgroup io.stat
  blk-cgroup: make iostat functions visible to stat printing
  block: improve discard bio alignment in __blkdev_issue_discard()
  block: change REQ_OP_ZONE_RESET and REQ_OP_ZONE_RESET_ALL to be odd numbers
  block: defer flush request no matter whether we have elevator
  block: make blk_timeout_init() static
  block: remove retry loop in ioc_release_fn()
  block: remove unnecessary ioc nested locking
  block: integrate bd_start_claiming into __blkdev_get
  ...

Pull mtd fix from Richard Weinberger.

* 'mtd/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: properly check all write ioctls for permissions

Instead of waiting in a loop for the userfaultfd condition to become
true, just wait once and return VM_FAULT_RETRY.

We've already dropped the mmap lock, we know we can't really
successfully handle the fault at this point and the caller will have to
retry anyway.  So there's no point in making the wait any more
complicated than it needs to be - just schedule away.

And once you don't have that complexity with explicit looping, you can
also just lose all the 'userfaultfd_signal_pending()' complexity,
because once we've set the correct process sleeping state, and don't
loop, the act of scheduling itself will be checking if there are any
pending signals before going to sleep.

We can also drop the VM_FAULT_MAJOR games, since we'll be treating all
retried faults as major soon anyway (series to regularize and share more
of fault handling across architectures in a separate series by Peter Xu,
and in the meantime we won't worry about the possible minor - I'll be
here all week, try the veal - accounting difference).

Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull file locking fix from Jeff Layton:
 "Just a single, one-line patch to fix an inefficiency in the posix
  locking code that can lead to it doing more wakeups than necessary"

* tag 'filelock-v5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  locks: add locks_move_blocks in posix_lock_inode

Pull crypto updates from Herbert Xu:
 "API:
   - Add support for allocating transforms on a specific NUMA Node
   - Introduce the flag CRYPTO_ALG_ALLOCATES_MEMORY for storage users

  Algorithms:
   - Drop PMULL based ghash on arm64
   - Fixes for building with clang on x86
   - Add sha256 helper that does the digest in one go
   - Add SP800-56A rev 3 validation checks to dh

  Drivers:
   - Permit users to specify NUMA node in hisilicon/zip
   - Add support for i.MX6 in imx-rngc
   - Add sa2ul crypto driver
   - Add BA431 hwrng driver
   - Add Ingenic JZ4780 and X1000 hwrng driver
   - Spread IRQ affinity in inside-secure and marvell/cesa"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (157 commits)
  crypto: sa2ul - Fix inconsistent IS_ERR and PTR_ERR
  hwrng: core - remove redundant initialization of variable ret
  crypto: x86/curve25519 - Remove unused carry variables
  crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000
  dt-bindings: RNG: Add Ingenic RNG bindings.
  crypto: caam/qi2 - add module alias
  crypto: caam - add more RNG hw error codes
  crypto: caam/jr - remove incorrect reference to caam_jr_register()
  crypto: caam - silence .setkey in case of bad key length
  crypto: caam/qi2 - create ahash shared descriptors only once
  crypto: caam/qi2 - fix error reporting for caam_hash_alloc
  crypto: caam - remove deadcode on 32-bit platforms
  crypto: ccp - use generic power management
  crypto: xts - Replace memcpy() invocation with simple assignment
  crypto: marvell/cesa - irq balance
  crypto: inside-secure - irq balance
  crypto: ecc - SP800-56A rev 3 local public key validation
  crypto: dh - SP800-56A rev 3 local public key validation
  crypto: dh - check validity of Z before export
  lib/mpi: Add mpi_sub_ui()
  ...

Pull fsverity update from Eric Biggers:
 "One fix for fs/verity/ to strengthen a memory barrier which might be
  too weak. This mirrors a similar fix in fs/crypto/"

* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fs-verity: use smp_load_acquire() for ->i_verity_info

Pull fscrypt updates from Eric Biggers:
 "This release, we add support for inline encryption via the blk-crypto
  framework which was added in 5.8.

  Now when an ext4 or f2fs filesystem is mounted with '-o inlinecrypt',
  the contents of encrypted files will be encrypted/decrypted via
  blk-crypto, instead of directly using the crypto API. This model
  allows taking advantage of the inline encryption hardware that is
  integrated into the UFS or eMMC host controllers on most mobile SoCs.

  Note that this is just an alternate implementation; the ciphertext
  written to disk stays the same.

  (This pull request does *not* include support for direct I/O on
  encrypted files, which blk-crypto makes possible, since that part is
  still being discussed.)

  Besides the above feature update, there are also a few fixes and
  cleanups, e.g. strengthening some memory barriers that may be too
  weak.

  All these patches have been in linux-next with no reported issues.
  I've also tested them with the fscrypt xfstests, as usual. It's also
  been tested that the inline encryption support works with the support
  for Qualcomm and Mediatek inline encryption hardware that will be in
  the scsi pull request for 5.9. Also, several SoC vendors are already
  using a previous, functionally equivalent version of these patches"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fscrypt: don't load ->i_crypt_info before it's known to be valid
  fscrypt: document inline encryption support
  fscrypt: use smp_load_acquire() for ->i_crypt_info
  fscrypt: use smp_load_acquire() for ->s_master_keys
  fscrypt: use smp_load_acquire() for fscrypt_prepared_key
  fscrypt: switch fscrypt_do_sha256() to use the SHA-256 library
  fscrypt: restrict IV_INO_LBLK_* to AES-256-XTS
  fscrypt: rename FS_KEY_DERIVATION_NONCE_SIZE
  fscrypt: add comments that describe the HKDF info strings
  ext4: add inline encryption support
  f2fs: add inline encryption support
  fscrypt: add inline encryption support
  fs: introduce SB_INLINECRYPT

Pull btrfs updates from David Sterba:
 "We don't have any big feature updates this time, there are lots of
  small enhacements or fixes. A highlight perhaps is the parallel fsync
  performance improvements, numbers below.

  Regarding the dio/iomap that was reverted last time, the required API
  changes are likely to land in the upcoming cycle, the btrfs part will
  be updated afterwards.

  User visible changes:

   - new mount option rescue= to group all recovery-related mount
     options so we don't have many specific options, currently
     introducing only aliases for existing options, future extensions
     are in development to allow read-only mount with partially damaged
     structures:
      - usebackuproot is an alias for rescue=usebackuproot
      - nologreplay is an alias for rescue=nologreplay

   - start deprecation of mount option inode_cache, removal scheduled to
     v5.11

   - removed deprecated mount options alloc_start and subvolrootid

   - device stats corruption counter gets incremented when a checksum
     mismatch is found

   - qgroup information exported in /sys/fs/btrfs/<UUID>/qgroups/<id>
     using sysfs

   - add link /sys/fs/btrfs/<UUID>/bdi pointing to the associated
     backing dev info

   - FS_INFO ioctl enhancements:
      - add flags to request/describe newly added items
      - new item: numeric checksum type and checksum size
      - new item: generation
      - new item: metadata_uuid

   - seed device: with one new read-write device added, print the new
     device information in /proc/mounts

   - balance: detect cancellation by Ctrl-C in existing cancellation
     points

  Performance improvements:

   - optimized versions of various helpers on little-endian
     architectures, where we don't have to do LE/BE conversion from
     on-disk format

   - tree-log/fsync optimizations leading to lower max latency reported
     by dbench, reduced by about 12%

   - all chunk tree leaves are prefetched at mount time, can improve
     mount time on large (terabyte-sized) filesystems

   - speed up parallel fsync of files with reflinked/deduped extents,
     with jobs 16 to 1024 the throughput gets improved roughly by 50% on
     average and runtime decreased roughly by 30% on average, notable
     outlier is 128 jobs with +121.2% on throughput and -54.6% runtime

   - another speed up of parallel fsync, reduce number of checksum tree
     lookups and contention, the improvements start to show up with 2
     tasks with +20% throughput and -16% runtime up to 64 with +200%
     throughput and -66% runtime

  Core:

   - umount-time qgroup leak checker

   - qgroups
      - add a way to unreserve partial range after failure, avoiding
        some EDQUOT errors
      - improved flushing logic when EDQUOT is hit

   - possible EINTR interruption caused by failed reservations after
     transaction start is better handled and documented

   - transaction abort errors are unified to EROFS in case it's not the
     original reason of abort or we don't have other way to determine
     the reason

  Fixes:

   - make truncate succeed on a NOCOW file even if data space is
     exhausted

   - fix cancelling balance on filesystem with exhausted metadata space

   - anon block device:
      - preallocate anon bdev when subvolume is created to report
        failure early
      - shorten time the anon bdev id is allocated
      - don't allocate anon bdev for internal roots

   - minor memory leak in ref-verify

   - refuse invalid combinations of compression and NOCOW file flags

   - lockdep fixes, updating the device locks

   - remove obsolete fallback logic for block group profile adjustments
     when switching from 1 to more devices, causing allocation of
     unwanted block groups

  Other cleanups, refactoring, simplifications:

   - conversions from struct inode to struct btrfs_inode in internal
     functions

   - removal of unused struct members"

* tag 'for-5.9-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (151 commits)
  btrfs: do not set the full sync flag on the inode during page release
  btrfs: release old extent maps during page release
  btrfs: fix race between page release and a fast fsync
  btrfs: open-code remount flag setting in btrfs_remount
  btrfs: if we're restriping, use the target restripe profile
  btrfs: don't adjust bg flags and use default allocation profiles
  btrfs: fix lockdep splat from btrfs_dump_space_info
  btrfs: move the chunk_mutex in btrfs_read_chunk_tree
  btrfs: open device without device_list_mutex
  btrfs: sysfs: use NOFS for device creation
  btrfs: return EROFS for BTRFS_FS_STATE_ERROR cases
  btrfs: document special case error codes for fs errors
  btrfs: don't WARN if we abort a transaction with EROFS
  btrfs: reduce contention on log trees when logging checksums
  btrfs: remove done label in writepage_delalloc
  btrfs: add comments for btrfs_reserve_flush_enum
  btrfs: relocation: review the call sites which can be interrupted by signal
  btrfs: avoid possible signal interruption of btrfs_drop_snapshot() on relocation tree
  btrfs: relocation: allow signal to cancel balance
  btrfs: raid56: remove out label in __raid56_parity_recover
  ...

Pull tpm updates from Jarkko Sakkinen:
 "An issue was fixed with the TPM space buffer size. The buffer is used
  to store in-TPM objects while swapped out of the TPM for a /dev/tpmrm0
  session. The code incorrectly used PAGE_SIZE, which obviously can
  vary. With these changes the buffer has a fixed size of 16 kB.

  In addition, this contains support for acquiring TPM even log from
  TPM2 ACPI table. This method is used by QEMU in particular"

* tag 'tpmdd-next-v5.9' of git://git.infradead.org/users/jjs/linux-tpmdd:
  tpm: Add support for event log pointer found in TPM2 ACPI table
  acpi: Extend TPM2 ACPI table with missing log fields
  tpm: Unify the mismatching TPM space buffer sizes
  tpm: Require that all digests are present in TCG_PCR_EVENT2 structures

That gives us ordering guarantees around the pair.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

It turns out that wait_on_page_bit_common() had several problems,
ranging from just unfair behavioe due to re-queueing at the end of the
wait queue when re-trying, and an outright bug that could result in
missed wakeups (but probably never happened in practice).

This rewrites the whole logic to avoid both issues, by simply moving the
logic to check (and possibly take) the bit lock into the wakeup path
instead.

That makes everything much more straightforward, and means that we never
need to re-queue the wait entry: if we get woken up, we'll be notified
through WQ_FLAG_WOKEN, and the wait queue entry will have been removed,
and everything will have been done for us.

Link: https://lore.kernel.org/lkml/CAHk-=wjJA2Z3kUFb-5s=6+n0qbTs8ELqKFt9B3pH85a8fGD73w@mail.gmail.com/
Link: https://lore.kernel.org/lkml/alpine.LSU.2.11.2007221359450.1017@eggly.anvils/Reported-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull x86 fix from Ingo Molnar:
 "A single fix for a potential deadlock when printing a message about
  spurious interrupts"

* tag 'x86-urgent-2020-08-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/i8259: Use printk_deferred() to prevent deadlock

Merge tag 'kbuild-fixes-v5.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - clean the generated moc file for xconfig

 - fix xconfig bugs, and revert some bad commits

* tag 'kbuild-fixes-v5.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: remove redundant FORCE definition in scripts/Makefile.modpost
  kconfig: qconf: remove wrong ConfigList::firstChild()
  Revert "kconfig: qconf: don't show goback button on splitMode"
  Revert "kconfig: qconf: Change title for the item window"
  kconfig: qconf: remove "goBack" debug message
  kconfig: qconf: use delete[] instead of delete to free array
  kconfig: qconf: compile moc object separately
  kconfig: qconf: use if_changed for qconf.moc rule
  modpost: explain why we can't use strsep

Pull KVM fixes from Paolo Bonzini:
 "Bugfixes and strengthening the validity checks on inputs from new
  userspace APIs.

  Now I know why I shouldn't prepare pull requests on the weekend, it's
  hard to concentrate if your son is shouting about his latest Minecraft
  builds in your ear. Fortunately all the patches were ready and I just
  had to check the test results..."

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM
  KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
  KVM: arm64: Don't inherit exec permission across page-table levels
  KVM: arm64: Prevent vcpu_has_ptrauth from generating OOL functions
  KVM: nVMX: check for invalid hdr.vmx.flags
  KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE
  selftests: kvm: do not set guest mode flag

The same code exists a few lines above.

Fixes: 436b2ac6 ("modpost: invoke modpost only when input files are updated")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

This function returns the first child object, but the returned pointer
is not compatible with (ConfigItem *).

Commit cc1c08ed ("kconfig: qconf: don't show goback button on
splitMode") uncovered this issue because using the pointer from this
function would make qconf crash. (https://lkml.org/lkml/2020/7/18/411)

This function does not work. Remove.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Pull networking fixes from David Miller:

 1) Encap offset calculation is incorrect in esp6, from Sabrina Dubroca.

 2) Better parameter validation in pfkey_dump(), from Mark Salyzyn.

 3) Fix several clang issues on powerpc in selftests, from Tanner Love.

 4) cmsghdr_from_user_compat_to_kern() uses the wrong length, from Al
    Viro.

 5) Out of bounds access in mlx5e driver, from Raed Salem.

 6) Fix transfer buffer memleak in lan78xx, from Johan Havold.

 7) RCU fixups in rhashtable, from Herbert Xu.

 8) Fix ipv6 nexthop refcnt leak, from Xiyu Yang.

 9) vxlan FDB dump must be done under RCU, from Ido Schimmel.

10) Fix use after free in mlxsw, from Ido Schimmel.

11) Fix map leak in HASH_OF_MAPS bpf code, from Andrii Nakryiko.

12) Fix bug in mac80211 Tx ack status reporting, from Vasanthakumar
    Thiagarajan.

13) Fix memory leaks in IPV6_ADDRFORM code, from Cong Wang.

14) Fix bpf program reference count leaks in mlx5 during
    mlx5e_alloc_rq(), from Xin Xiong.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (86 commits)
  vxlan: fix memleak of fdb
  rds: Prevent kernel-infoleak in rds_notify_queue_get()
  net/sched: The error lable position is corrected in ct_init_module
  net/mlx5e: fix bpf_prog reference count leaks in mlx5e_alloc_rq
  net/mlx5e: E-Switch, Specify flow_source for rule with no in_port
  net/mlx5e: E-Switch, Add misc bit when misc fields changed for mirroring
  net/mlx5e: CT: Support restore ipv6 tunnel
  net: gemini: Fix missing clk_disable_unprepare() in error path of gemini_ethernet_port_probe()
  ionic: unlock queue mutex in error path
  atm: fix atm_dev refcnt leaks in atmtcp_remove_persistent
  net: ethernet: mtk_eth_soc: fix MTU warnings
  net: nixge: fix potential memory leak in nixge_probe()
  devlink: ignore -EOPNOTSUPP errors on dumpit
  rxrpc: Fix race between recvmsg and sendmsg on immediate call failure
  MAINTAINERS: Replace Thor Thayer as Altera Triple Speed Ethernet maintainer
  selftests/bpf: fix netdevsim trap_flow_action_cookie read
  ipv6: fix memory leaks on IPV6_ADDRFORM path
  net/bpfilter: Initialize pos in __bpfilter_process_sockopt
  igb: reinit_locked() should be called with rtnl_lock
  e1000e: continue to init PHY even when failed to disable ULP
  ...

Pull thread fix from Christian Brauner:
 "A simple spelling fix for dequeue_synchronous_signal()"

* tag 'for-linus-2020-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  signal: fix typo in dequeue_synchronous_signal()

Pull perf tooling fixes from Arnaldo Carvalho de Melo:

 - Fix libtraceevent build with binutils 2.35

 - Fix memory leak in process_dynamic_array_len in libtraceevent

 - Fix 'perf test 68' zstd compression for s390

 - Fix record failure when mixed with ARM SPE event

* tag 'perf-tools-fixes-2020-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  libtraceevent: Fix build with binutils 2.35
  perf tools: Fix record failure when mixed with ARM SPE event
  perf tests: Fix test 68 zstd compression for s390
  tools lib traceevent: Fix memory leak in process_dynamic_array_len

When vxlan interface is deleted, all fdbs are deleted by vxlan_flush().
vxlan_flush() flushes fdbs but it doesn't delete fdb, which contains
all-zeros-mac because it is deleted by vxlan_uninit().
But vxlan_uninit() deletes only the fdb, which contains both all-zeros-mac
and default vni.
So, the fdb, which contains both all-zeros-mac and non-default vni
will not be deleted.

Test commands:
    ip link add vxlan0 type vxlan dstport 4789 external
    ip link set vxlan0 up
    bridge fdb add to 00:00:00:00:00:00 dst 172.0.0.1 dev vxlan0 via lo \
	    src_vni 10000 self permanent
    ip link del vxlan0

kmemleak reports as follows:
unreferenced object 0xffff9486b25ced88 (size 96):
  comm "bridge", pid 2151, jiffies 4294701712 (age 35506.901s)
  hex dump (first 32 bytes):
    02 00 00 00 ac 00 00 01 40 00 09 b1 86 94 ff ff  ........@.......
    46 02 00 00 00 00 00 00 a7 03 00 00 12 b5 6a 6b  F.............jk
  backtrace:
    [<00000000c10cf651>] vxlan_fdb_append.part.51+0x3c/0xf0 [vxlan]
    [<000000006b31a8d9>] vxlan_fdb_create+0x184/0x1a0 [vxlan]
    [<0000000049399045>] vxlan_fdb_update+0x12f/0x220 [vxlan]
    [<0000000090b1ef00>] vxlan_fdb_add+0x12a/0x1b0 [vxlan]
    [<0000000056633c2c>] rtnl_fdb_add+0x187/0x270
    [<00000000dd5dfb6b>] rtnetlink_rcv_msg+0x264/0x490
    [<00000000fc44dd54>] netlink_rcv_skb+0x4a/0x110
    [<00000000dff433e7>] netlink_unicast+0x18e/0x250
    [<00000000b87fb421>] netlink_sendmsg+0x2e9/0x400
    [<000000002ed55153>] ____sys_sendmsg+0x237/0x260
    [<00000000faa51c66>] ___sys_sendmsg+0x88/0xd0
    [<000000006c3982f1>] __sys_sendmsg+0x4e/0x80
    [<00000000a8f875d2>] do_syscall_64+0x56/0xe0
    [<000000003610eefa>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
unreferenced object 0xffff9486b1c40080 (size 128):
  comm "bridge", pid 2157, jiffies 4294701754 (age 35506.866s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 f8 dc 42 b2 86 94 ff ff  ..........B.....
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace:
    [<00000000a2981b60>] vxlan_fdb_create+0x67/0x1a0 [vxlan]
    [<0000000049399045>] vxlan_fdb_update+0x12f/0x220 [vxlan]
    [<0000000090b1ef00>] vxlan_fdb_add+0x12a/0x1b0 [vxlan]
    [<0000000056633c2c>] rtnl_fdb_add+0x187/0x270
    [<00000000dd5dfb6b>] rtnetlink_rcv_msg+0x264/0x490
    [<00000000fc44dd54>] netlink_rcv_skb+0x4a/0x110
    [<00000000dff433e7>] netlink_unicast+0x18e/0x250
    [<00000000b87fb421>] netlink_sendmsg+0x2e9/0x400
    [<000000002ed55153>] ____sys_sendmsg+0x237/0x260
    [<00000000faa51c66>] ___sys_sendmsg+0x88/0xd0
    [<000000006c3982f1>] __sys_sendmsg+0x4e/0x80
    [<00000000a8f875d2>] do_syscall_64+0x56/0xe0
    [<000000003610eefa>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 3ad7a4b1 ("vxlan: support fdb and learning in COLLECT_METADATA mode")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull pin control fix from Linus Walleij:
 "A single last minute pin control fix to the Qualcomm driver fixing
  missing dual edge PCH interrupts"

* tag 'pinctrl-v5.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: qcom: Handle broken/missing PDC dual edge IRQs on sc7180

As recently done with with send/recv, flip the if after
rw_verify_aread() in io_{read,write}() and tabulise left bits left.
This removes mispredicted by a compiler jump on the success/fast path.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Use a local var to collect flags in kiocb_set_rw_flags(). That spares
some memory writes and allows to replace most of the jumps with MOVEcc.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

This reverts commit cc1c08ed.

Maxim Levitsky reports 'make xconfig' crashes since that commit
(https://lkml.org/lkml/2020/7/18/411)

Or, the following is simple test code that makes it crash:

    menu "Menu"

    config FOO
            bool "foo"
            default y

    menuconfig BAR
            bool "bar"
            depends on FOO

    endmenu

Select the Split View mode, and double-click "bar" in the right
window, then you will see Segmentation fault.

When 'last' is not set for symbolMode, the following code in
ConfigList::updateList() calls firstChild().

  item = last ? last->nextSibling() : firstChild();

However, the pointer returned by ConfigList::firstChild() does not
seem to be compatible with (ConfigItem *), which seems another bug.

I'd rather want to reconsider whether hiding the goback icon is the
right thing to do.

In the following test code, the Split View shows "Menu2" and "Menu3"
in the right window. You can descend into "Menu3", but there is no way
to ascend back to "Menu2" from "Menu3".

    menu "Menu1"

    config FOO
            bool "foo"
            default y

    menu "Menu2"
            depends on FOO

    menu "Menu3"

    config BAZ
            bool "baz"

    endmenu

    endmenu

    endmenu

It is true that the goback button is currently not functional due to
yet another bug, but hiding the problem is not the right way to go.

Anyway, Segmentation fault is fatal. Revert the offending commit for
now, and we should find the right solution.
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

This reverts commit 5752ff07.

It added dead code to ConfigList:ConfigList().

The constructor of ConfigList has the initializer, mode(singleMode).

    if (mode == symbolMode)
           setHeaderLabels(QStringList() << "Item" << "Name" << "N" << "M" << "Y" << "Value");
    else
           setHeaderLabels(QStringList() << "Option" << "Name" << "N" << "M" << "Y" << "Value");

... always takes the else part.

The change to ConfigList::updateSelection() is strange too.
When you click the split view icon for the first time, the titles in
both windows show "Option". After you click something in the right
window, the title suddenly changes to "Item".

ConfigList::updateSelection() is not the right place to do this,
at least. It was not a good idea, I think.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Every time the goback icon is clicked, the annoying message "goBack"
is displayed on the console.

I guess this line is the left-over debug code of commit af737b4d
("kconfig: qconf: simplify the goBack() logic").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

cppcheck reports "Mismatching allocation and deallocation".

$ cppcheck scripts/kconfig/qconf.cc
Checking scripts/kconfig/qconf.cc ...
scripts/kconfig/qconf.cc:1242:10: error: Mismatching allocation and deallocation: data [mismatchAllocDealloc]
  delete data;
         ^
scripts/kconfig/qconf.cc:1236:15: note: Mismatching allocation and deallocation: data
 char *data = new char[count + 1];
              ^
scripts/kconfig/qconf.cc:1242:10: note: Mismatching allocation and deallocation: data
  delete data;
         ^
scripts/kconfig/qconf.cc:1255:10: error: Mismatching allocation and deallocation: data [mismatchAllocDealloc]
  delete data;
         ^
scripts/kconfig/qconf.cc:1236:15: note: Mismatching allocation and deallocation: data
 char *data = new char[count + 1];
              ^
scripts/kconfig/qconf.cc:1255:10: note: Mismatching allocation and deallocation: data
  delete data;
         ^

Fixes: c4f7398b ("kconfig: qconf: make debug links work again")
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Currently, qconf.moc is included from qconf.cc but they can be compiled
independently.

When you modify qconf.cc, qconf.moc does not need recompiling.

Rename qconf.moc to qconf-moc.cc, and split it out as an independent
compilation unit.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Regenerate qconf.moc when the moc command is changed.

This also allows 'make mrproper' to clean it up. Previously, it was
not cleaned up because 'clean-files += qconf.moc' was missing.
Now 'make mrproper' correctly cleans it up because files listed in
'targets' are cleaned.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Daniel Borkmann says:

====================
pull-request: bpf 2020-07-31

The following pull-request contains BPF updates for your *net* tree.

We've added 5 non-merge commits during the last 21 day(s) which contain
a total of 5 files changed, 126 insertions(+), 18 deletions(-).

The main changes are:

1) Fix a map element leak in HASH_OF_MAPS map type, from Andrii Nakryiko.

2) Fix a NULL pointer dereference in __btf_resolve_helper_id() when no
   btf_vmlinux is available, from Peilin Ye.

3) Init pos variable in __bpfilter_process_sockopt(), from Christoph Hellwig.

4) Fix a cgroup sockopt verifier test by specifying expected attach type,
   from Jean-Philippe Brucker.

Note that when net gets merged into net-next later on, there is a small
merge conflict in kernel/bpf/btf.c between commit 5b801dfb ("bpf: Fix
NULL pointer dereference in __btf_resolve_helper_id()") from the bpf tree
and commit 138b9a05 ("bpf: Remove btf_id helpers resolving") from the
net-next tree.

Resolve as follows: remove the old hunk with the __btf_resolve_helper_id()
function. Change the btf_resolve_helper_id() so it actually tests for a
NULL btf_vmlinux and bails out:

int btf_resolve_helper_id(struct bpf_verifier_log *log,
                          const struct bpf_func_proto *fn, int arg)
{
        int id;

        if (fn->arg_type[arg] != ARG_PTR_TO_BTF_ID || !btf_vmlinux)
                return -EINVAL;
        id = fn->btf_id[arg];
        if (!id || id > btf_vmlinux->nr_types)
                return -EINVAL;
        return id;
}

Let me know if you run into any others issues (CC'ing Jiri Olsa so he's in
the loop with regards to merge conflict resolution).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Steffen Klassert says:

====================
pull request (net): ipsec 2020-07-31

1) Fix policy matching with mark and mask on userspace interfaces.
   From Xin Long.

2) Several fixes for the new ESP in TCP encapsulation.
   From Sabrina Dubroca.

3) Fix crash when the hold queue is used. The assumption that
   xdst->path and dst->child are not a NULL pointer only if dst->xfrm
   is not a NULL pointer is true with the exception of using the
   hold queue. Fix this by checking for hold queue usage before
   dereferencing xdst->path or dst->child.

4) Validate pfkey_dump parameter before sending them.
   From Mark Salyzyn.

5) Fix the location of the transport header with ESP in UDPv6
   encapsulation. From Sabrina Dubroca.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2020-07-30

This small patchset introduces some fixes to mlx5 driver.

Please pull and let me know if there is any problem.

For -stable v4.18:
 ('net/mlx5e: fix bpf_prog reference count leaks in mlx5e_alloc_rq')

For -stable v5.7:
 ('net/mlx5e: E-Switch, Add misc bit when misc fields changed for mirroring')
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

rds_notify_queue_get() is potentially copying uninitialized kernel stack
memory to userspace since the compiler may leave a 4-byte hole at the end
of `cmsg`.

In 2016 we tried to fix this issue by doing `= { 0 };` on `cmsg`, which
unfortunately does not always initialize that 4-byte hole. Fix it by using
memset() instead.

Cc: stable@vger.kernel.org
Fixes: f037590f ("rds: fix a leak of kernel memory")
Fixes: bdbe6fbc ("RDS: recv.c")
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2020-07-30

This series contains updates to the e1000e and igb drivers.

Aaron Ma allows PHY initialization to continue if ULP disable failed for
e1000e.

Francesco Ruggeri fixes race conditions in igb reset that could cause panics.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>