BPF helpers bpf_task_storage_[get|delete] could hold two locks:
bpf_local_storage_map_bucket->lock and bpf_local_storage->lock. Calling
these helpers from fentry/fexit programs on functions in bpf_*_storage.c
may cause deadlock on either locks.

Prevent such deadlock with a per cpu counter, bpf_task_storage_busy. We
need this counter to be global, because the two locks here belong to two
different objects: bpf_local_storage_map and bpf_local_storage. If we
pick one of them as the owner of the counter, it is still possible to
trigger deadlock on the other lock. For example, if bpf_local_storage_map
owns the counters, it cannot prevent deadlock on bpf_local_storage->lock
when two maps are used.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210225234319.336131-3-songliubraving@fb.com

To access per-task data, BPF programs usually creates a hash table with
pid as the key. This is not ideal because:
 1. The user need to estimate the proper size of the hash table, which may
    be inaccurate;
 2. Big hash tables are slow;
 3. To clean up the data properly during task terminations, the user need
    to write extra logic.

Task local storage overcomes these issues and offers a better option for
these per-task data. Task local storage is only available to BPF_LSM. Now
enable it for tracing programs.

Unlike LSM programs, tracing programs can be called in IRQ contexts.
Helpers that access task local storage are updated to use
raw_spin_lock_irqsave() instead of raw_spin_lock_bh().

Tracing programs can attach to functions on the task free path, e.g.
exit_creds(). To avoid allocating task local storage after
bpf_task_storage_free(). bpf_task_storage_get() is updated to not allocate
new storage when the task is not refcounted (task->usage == 0).
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210225234319.336131-2-songliubraving@fb.com

This patch is used to construct skb based on page to save memory copy
overhead.

This function is implemented based on IFF_TX_SKB_NO_LINEAR. Only the
network card priv_flags supports IFF_TX_SKB_NO_LINEAR will use page to
directly construct skb. If this feature is not supported, it is still
necessary to copy data to construct skb.

  ---------------- Performance Testing ------------

  The test environment is Aliyun ECS server.

  Test cmd:
  ```
  xdpsock -i eth0 -t  -S -s <msg size>
  ```

  Test result data:

  size    64      512     1024    1500
  copy    1916747 1775988 1600203 1440054
  page    1974058 1953655 1945463 1904478
  percent 3.0%    10.0%   21.58%  32.3%
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210218204908.5455-6-alobakin@pm.me

xsk_generic_xmit() allocates a new skb and then queues it for
xmitting. The size of new skb's headroom is desc->len, so it comes
to the driver/device with no reserved headroom and/or tailroom.
Lots of drivers need some headroom (and sometimes tailroom) to
prepend (and/or append) some headers or data, e.g. CPU tags,
device-specific headers/descriptors (LSO, TLS etc.), and if case
of no available space skb_cow_head() will reallocate the skb.
Reallocations are unwanted on fast-path, especially when it comes
to XDP, so generic XSK xmit should reserve the spaces declared in
dev->needed_headroom and dev->needed tailroom to avoid them.

Note on max(NET_SKB_PAD, L1_CACHE_ALIGN(dev->needed_headroom)):

Usually, output functions reserve LL_RESERVED_SPACE(dev), which
consists of dev->hard_header_len + dev->needed_headroom, aligned
by 16.

However, on XSK xmit hard header is already here in the chunk, so
hard_header_len is not needed. But it'd still be better to align
data up to cacheline, while reserving no less than driver requests
for headroom. NET_SKB_PAD here is to double-insure there will be
no reallocations even when the driver advertises no needed_headroom,
but in fact need it (not so rare case).

Fixes: 35fcde7f ("xsk: support for Tx")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210218204908.5455-5-alobakin@pm.me

Virtio net supports the case where the skb linear space is empty, so
add priv_flags.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210218204908.5455-4-alobakin@pm.me

In some cases, we hope to construct skb directly based on the existing
memory without copying data. In this case, the page will be placed
directly in the skb, and the linear space of skb is empty. But
unfortunately, many the network card does not support this operation.
For example Mellanox Technologies MT27710 Family [ConnectX-4 Lx] will
get the following error message:

    mlx5_core 0000:3b:00.1 eth1: Error cqe on cqn 0x817, ci 0x8,
    qn 0x1dbb, opcode 0xd, syndrome 0x1, vendor syndrome 0x68
    00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00000030: 00 00 00 00 60 10 68 01 0a 00 1d bb 00 0f 9f d2
    WQE DUMP: WQ size 1024 WQ cur size 0, WQE index 0xf, len: 64
    00000000: 00 00 0f 0a 00 1d bb 03 00 00 00 08 00 00 00 00
    00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00000020: 00 00 00 2b 00 08 00 00 00 00 00 05 9e e3 08 00
    00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    mlx5_core 0000:3b:00.1 eth1: ERR CQE on SQ: 0x1dbb

So a priv_flag is added here to indicate whether the network card
supports this feature.
Suggested-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210218204908.5455-3-alobakin@pm.me

This is harmless for now, but can be fatal for future refactors.

Fixes: 871b642a ("netdev: introduce ndo_set_rx_headroom")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210218204908.5455-2-alobakin@pm.me

This adds both the CONFIG_DEBUG_INFO_BTF and CONFIG_DEBUG_INFO_BTF_MODULES
kernel compile option to output of the bpftool feature command.

This is relevant for developers that want to account for data structure
definition differences between kernels.
Signed-off-by: Grant Seltzer <grantseltzer@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210222195846.155483-1-grantseltzer@gmail.com

Pull performance event updates from Ingo Molnar:

 - Add CPU-PMU support for Intel Sapphire Rapids CPUs

 - Extend the perf ABI with PERF_SAMPLE_WEIGHT_STRUCT, to offer
   two-parameter sampling event feedback. Not used yet, but is intended
   for Golden Cove CPU-PMU, which can provide both the instruction
   latency and the cache latency information for memory profiling
   events.

 - Remove experimental, default-disabled perfmon-v4 counter_freezing
   support that could only be enabled via a boot option. The hardware is
   hopelessly broken, we'd like to make sure nobody starts relying on
   this, as it would only end in tears.

 - Fix energy/power events on Intel SPR platforms

 - Simplify the uprobes resume_execution() logic

 - Misc smaller fixes.

* tag 'perf-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/rapl: Fix psys-energy event on Intel SPR platform
  perf/x86/rapl: Only check lower 32bits for RAPL energy counters
  perf/x86/rapl: Add msr mask support
  perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[]
  perf/x86/intel: Support CPUID 10.ECX to disable fixed counters
  perf/x86/intel: Add perf core PMU support for Sapphire Rapids
  perf/x86/intel: Filter unsupported Topdown metrics event
  perf/x86/intel: Factor out intel_update_topdown_event()
  perf/core: Add PERF_SAMPLE_WEIGHT_STRUCT
  perf/intel: Remove Perfmon-v4 counter_freezing support
  x86/perf: Use static_call for x86_pmu.guest_get_msrs
  perf/x86/intel/uncore: With > 8 nodes, get pci bus die id from NUMA info
  perf/x86/intel/uncore: Store the logical die id instead of the physical die id.
  x86/kprobes: Do not decode opcode in resume_execution()

Pull scheduler updates from Ingo Molnar:
 "Core scheduler updates:

   - Add CONFIG_PREEMPT_DYNAMIC: this in its current form adds the
     preempt=none/voluntary/full boot options (default: full), to allow
     distros to build a PREEMPT kernel but fall back to close to
     PREEMPT_VOLUNTARY (or PREEMPT_NONE) runtime scheduling behavior via
     a boot time selection.

     There's also the /debug/sched_debug switch to do this runtime.

     This feature is implemented via runtime patching (a new variant of
     static calls).

     The scope of the runtime patching can be best reviewed by looking
     at the sched_dynamic_update() function in kernel/sched/core.c.

     ( Note that the dynamic none/voluntary mode isn't 100% identical,
       for example preempt-RCU is available in all cases, plus the
       preempt count is maintained in all models, which has runtime
       overhead even with the code patching. )

     The PREEMPT_VOLUNTARY/PREEMPT_NONE models, used by the vast
     majority of distributions, are supposed to be unaffected.

   - Fix ignored rescheduling after rcu_eqs_enter(). This is a bug that
     was found via rcutorture triggering a hang. The bug is that
     rcu_idle_enter() may wake up a NOCB kthread, but this happens after
     the last generic need_resched() check. Some cpuidle drivers fix it
     by chance but many others don't.

     In true 2020 fashion the original bug fix has grown into a 5-patch
     scheduler/RCU fix series plus another 16 RCU patches to address the
     underlying issue of missed preemption events. These are the initial
     fixes that should fix current incarnations of the bug.

   - Clean up rbtree usage in the scheduler, by providing & using the
     following consistent set of rbtree APIs:

       partial-order; less() based:
         - rb_add(): add a new entry to the rbtree
         - rb_add_cached(): like rb_add(), but for a rb_root_cached

       total-order; cmp() based:
         - rb_find(): find an entry in an rbtree
         - rb_find_add(): find an entry, and add if not found

         - rb_find_first(): find the first (leftmost) matching entry
         - rb_next_match(): continue from rb_find_first()
         - rb_for_each(): iterate a sub-tree using the previous two

   - Improve the SMP/NUMA load-balancer: scan for an idle sibling in a
     single pass. This is a 4-commit series where each commit improves
     one aspect of the idle sibling scan logic.

   - Improve the cpufreq cooling driver by getting the effective CPU
     utilization metrics from the scheduler

   - Improve the fair scheduler's active load-balancing logic by
     reducing the number of active LB attempts & lengthen the
     load-balancing interval. This improves stress-ng mmapfork
     performance.

   - Fix CFS's estimated utilization (util_est) calculation bug that can
     result in too high utilization values

  Misc updates & fixes:

   - Fix the HRTICK reprogramming & optimization feature

   - Fix SCHED_SOFTIRQ raising race & warning in the CPU offlining code

   - Reduce dl_add_task_root_domain() overhead

   - Fix uprobes refcount bug

   - Process pending softirqs in flush_smp_call_function_from_idle()

   - Clean up task priority related defines, remove *USER_*PRIO and
     USER_PRIO()

   - Simplify the sched_init_numa() deduplication sort

   - Documentation updates

   - Fix EAS bug in update_misfit_status(), which degraded the quality
     of energy-balancing

   - Smaller cleanups"

* tag 'sched-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
  sched,x86: Allow !PREEMPT_DYNAMIC
  entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point
  entry: Explicitly flush pending rcuog wakeup before last rescheduling point
  rcu/nocb: Trigger self-IPI on late deferred wake up before user resume
  rcu/nocb: Perform deferred wake up before last idle's need_resched() check
  rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
  sched/features: Distinguish between NORMAL and DEADLINE hrtick
  sched/features: Fix hrtick reprogramming
  sched/deadline: Reduce rq lock contention in dl_add_task_root_domain()
  uprobes: (Re)add missing get_uprobe() in __find_uprobe()
  smp: Process pending softirqs in flush_smp_call_function_from_idle()
  sched: Harden PREEMPT_DYNAMIC
  static_call: Allow module use without exposing static_call_key
  sched: Add /debug/sched_preempt
  preempt/dynamic: Support dynamic preempt with preempt= boot option
  preempt/dynamic: Provide irqentry_exit_cond_resched() static call
  preempt/dynamic: Provide preempt_schedule[_notrace]() static calls
  preempt/dynamic: Provide cond_resched() and might_resched() static calls
  preempt: Introduce CONFIG_PREEMPT_DYNAMIC
  static_call: Provide DEFINE_STATIC_CALL_RET0()
  ...

Pull tlb gather updates from Ingo Molnar:
 "Theses fix MM (soft-)dirty bit management in the procfs code & clean
  up the TLB gather API"

* tag 'core-mm-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ldt: Use tlb_gather_mmu_fullmm() when freeing LDT page-tables
  tlb: arch: Remove empty __tlb_remove_tlb_entry() stubs
  tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()
  tlb: mmu_gather: Introduce tlb_gather_mmu_fullmm()
  tlb: mmu_gather: Remove unused start/end arguments from tlb_finish_mmu()
  mm: proc: Invalidate TLB after clearing soft-dirty page state

Pull locking updates from Ingo Molnar:
 "Core locking primitives updates:
    - Remove mutex_trylock_recursive() from the API - no users left
    - Simplify + constify the futex code a bit

  Lockdep updates:
    - Teach lockdep about local_lock_t
    - Add CONFIG_DEBUG_IRQFLAGS=y debug config option to check for
      potentially unsafe IRQ mask restoration patterns. (I.e.
      calling raw_local_irq_restore() with IRQs enabled.)
    - Add wait context self-tests
    - Fix graph lock corner case corrupting internal data structures
    - Fix noinstr annotations

  LKMM updates:
    - Simplify the litmus tests
    - Documentation fixes

  KCSAN updates:
    - Re-enable KCSAN instrumentation in lib/random32.c

  Misc fixes:
    - Don't branch-trace static label APIs
    - DocBook fix
    - Remove stale leftover empty file"

* tag 'locking-core-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
  checkpatch: Don't check for mutex_trylock_recursive()
  locking/mutex: Kill mutex_trylock_recursive()
  s390: Use arch_local_irq_{save,restore}() in early boot code
  lockdep: Noinstr annotate warn_bogus_irq_restore()
  locking/lockdep: Avoid unmatched unlock
  locking/rwsem: Remove empty rwsem.h
  locking/rtmutex: Add missing kernel-doc markup
  futex: Remove unneeded gotos
  futex: Change utime parameter to be 'const ... *'
  lockdep: report broken irq restoration
  jump_label: Do not profile branch annotations
  locking: Add Reviewers
  locking/selftests: Add local_lock inversion tests
  locking/lockdep: Exclude local_lock_t from IRQ inversions
  locking/lockdep: Clean up check_redundant() a bit
  locking/lockdep: Add a skip() function to __bfs()
  locking/lockdep: Mark local_lock_t
  locking/selftests: More granular debug_locks_verbose
  lockdep/selftest: Add wait context selftests
  tools/memory-model: Fix typo in klitmus7 compatibility table
  ...

Pull RCU updates from Ingo Molnar:
 "These are the latest RCU updates for v5.12:

   - Documentation updates.

   - Miscellaneous fixes.

   - kfree_rcu() updates: Addition of mem_dump_obj() to provide
     allocator return addresses to more easily locate bugs. This has a
     couple of RCU-related commits, but is mostly MM. Was pulled in with
     akpm's agreement.

   - Per-callback-batch tracking of numbers of callbacks, which enables
     better debugging information and smarter reactions to large numbers
     of callbacks.

   - The first round of changes to allow CPUs to be runtime switched
     from and to callback-offloaded state.

   - CONFIG_PREEMPT_RT-related changes.

   - RCU CPU stall warning updates.

   - Addition of polling grace-period APIs for SRCU.

   - Torture-test and torture-test scripting updates, including a
     "torture everything" script that runs rcutorture, locktorture,
     scftorture, rcuscale, and refscale. Plus does an allmodconfig
     build.

   - nolibc fixes for the torture tests"

* tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (130 commits)
  percpu_ref: Dump mem_dump_obj() info upon reference-count underflow
  rcu: Make call_rcu() print mem_dump_obj() info for double-freed callback
  mm: Make mem_obj_dump() vmalloc() dumps include start and length
  mm: Make mem_dump_obj() handle vmalloc() memory
  mm: Make mem_dump_obj() handle NULL and zero-sized pointers
  mm: Add mem_dump_obj() to print source of memory block
  tools/rcutorture: Fix position of -lgcc in mkinitrd.sh
  tools/nolibc: Fix position of -lgcc in the documented example
  tools/nolibc: Emit detailed error for missing alternate syscall number definitions
  tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*
  tools/nolibc: Get timeval, timespec and timezone from linux/time.h
  tools/nolibc: Implement poll() based on ppoll()
  tools/nolibc: Implement fork() based on clone()
  tools/nolibc: Make getpgrp() fall back to getpgid(0)
  tools/nolibc: Make dup2() rely on dup3() when available
  tools/nolibc: Add the definition for dup()
  rcutorture: Add rcutree.use_softirq=0 to RUDE01 and TASKS01
  torture: Maintain torture-specific set of CPUs-online books
  torture: Clean up after torture-test CPU hotplugging
  rcutorture: Make object_debug also double call_rcu() heap object
  ...

Pull timer updates from Thomas Gleixner:
 "Time and timer updates:

   - Instead of new drivers remove tango, sirf, u300 and atlas drivers

   - Add suspend/resume support for microchip pit64b

   - The usual fixes, improvements and cleanups here and there"

* tag 'timers-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timens: Delete no-op time_ns_init()
  alarmtimer: Update kerneldoc
  clocksource/drivers/timer-microchip-pit64b: Add clocksource suspend/resume
  clocksource/drivers/prima: Remove sirf prima driver
  clocksource/drivers/atlas: Remove sirf atlas driver
  clocksource/drivers/tango: Remove tango driver
  clocksource/drivers/u300: Remove the u300 driver
  dt-bindings: timer: nuvoton: Clarify that interrupt of timer 0 should be specified
  clocksource/drivers/davinci: Move pr_fmt() before the includes
  clocksource/drivers/efm32: Drop unused timer code

Pull irq updates from Thomas Gleixner:
 "Updates for the irq subsystem:

   - The usual new irq chip driver (Realtek RTL83xx)

   - Removal of sirfsoc and tango irq chip drivers

   - Conversion of the sun6i chip support to hierarchical irq domains

   - The usual fixes, improvements and cleanups all over the place"

* tag 'irq-core-2021-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/imx: IMX_INTMUX should not default to y, unconditionally
  irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap
  irqchip/csky-mpintc: Prevent selection on unsupported platforms
  irqchip: Add support for Realtek RTL838x/RTL839x interrupt controller
  dt-bindings: interrupt-controller: Add Realtek RTL838x/RTL839x support
  irqchip/ls-extirq: add IRQCHIP_SKIP_SET_WAKE to the irqchip flags
  genirq: Use new tasklet API for resend_tasklet
  dt-bindings: qcom,pdc: Add compatible for SM8350
  dt-bindings: qcom,pdc: Add compatible for SM8250
  irqchip/sun6i-r: Add wakeup support
  irqchip/sun6i-r: Use a stacked irqchip driver
  dt-bindings: irq: sun6i-r: Add a compatible for the H3
  dt-bindings: irq: sun6i-r: Split the binding from sun7i-nmi
  irqchip/gic-v3: Fix typos in PMR/RPR SCR_EL3.FIQ handling explanation
  irqchip: Remove sirfsoc driver
  irqchip: Remove sigma tango driver

Pull io_uring updates from Jens Axboe:
 "Highlights from this cycles are things like request recycling and
  task_work optimizations, which net us anywhere from 10-20% of speedups
  on workloads that mostly are inline.

  This work was originally done to put io_uring under memcg, which adds
  considerable overhead. But it's a really nice win as well. Also worth
  highlighting is the LOOKUP_CACHED work in the VFS, and using it in
  io_uring. Greatly speeds up the fast path for file opens.

  Summary:

   - Put io_uring under memcg protection. We accounted just the rings
     themselves under rlimit memlock before, now we account everything.

   - Request cache recycling, persistent across invocations (Pavel, me)

   - First part of a cleanup/improvement to buffer registration (Bijan)

   - SQPOLL fixes (Hao)

   - File registration NULL pointer fixup (Dan)

   - LOOKUP_CACHED support for io_uring

   - Disable /proc/thread-self/ for io_uring, like we do for /proc/self

   - Add Pavel to the io_uring MAINTAINERS entry

   - Tons of code cleanups and optimizations (Pavel)

   - Support for skip entries in file registration (Noah)"

* tag 'for-5.12/io_uring-2021-02-17' of git://git.kernel.dk/linux-block: (103 commits)
  io_uring: tctx->task_lock should be IRQ safe
  proc: don't allow async path resolution of /proc/thread-self components
  io_uring: kill cached requests from exiting task closing the ring
  io_uring: add helper to free all request caches
  io_uring: allow task match to be passed to io_req_cache_free()
  io-wq: clear out worker ->fs and ->files
  io_uring: optimise io_init_req() flags setting
  io_uring: clean io_req_find_next() fast check
  io_uring: don't check PF_EXITING from syscall
  io_uring: don't split out consume out of SQE get
  io_uring: save ctx put/get for task_work submit
  io_uring: don't duplicate io_req_task_queue()
  io_uring: optimise SQPOLL mm/files grabbing
  io_uring: optimise out unlikely link queue
  io_uring: take compl state from submit state
  io_uring: inline io_complete_rw_common()
  io_uring: move res check out of io_rw_reissue()
  io_uring: simplify iopoll reissuing
  io_uring: clean up io_req_free_batch_finish()
  io_uring: move submit side state closer in the ring
  ...

Pull block driver updates from Jens Axboe:

 - Remove the skd driver. It's been EOL for a long time (Damien)

 - NVMe pull requests
      - fix multipath handling of ->queue_rq errors (Chao Leng)
      - nvmet cleanups (Chaitanya Kulkarni)
      - add a quirk for buggy Amazon controller (Filippo Sironi)
      - avoid devm allocations in nvme-hwmon that don't interact well
        with fabrics (Hannes Reinecke)
      - sysfs cleanups (Jiapeng Chong)
      - fix nr_zones for multipath (Keith Busch)
      - nvme-tcp crash fix for no-data commands (Sagi Grimberg)
      - nvmet-tcp fixes (Sagi Grimberg)
      - add a missing __rcu annotation (Christoph)
      - failed reconnect fixes (Chao Leng)
      - various tracing improvements (Michal Krakowiak, Johannes
        Thumshirn)
      - switch the nvmet-fc assoc_list to use RCU protection (Leonid
        Ravich)
      - resync the status codes with the latest spec (Max Gurtovoy)
      - minor nvme-tcp improvements (Sagi Grimberg)
      - various cleanups (Rikard Falkeborn, Minwoo Im, Chaitanya
        Kulkarni, Israel Rukshin)

 - Floppy O_NDELAY fix (Denis)

 - MD pull request
      - raid5 chunk_sectors fix (Guoqing)

 - Use lore links (Kees)

 - Use DEFINE_SHOW_ATTRIBUTE for nbd (Liao)

 - loop lock scaling (Pavel)

 - mtip32xx PCI fixes (Bjorn)

 - bcache fixes (Kai, Dongdong)

 - Misc fixes (Tian, Yang, Guoqing, Joe, Andy)

* tag 'for-5.12/drivers-2021-02-17' of git://git.kernel.dk/linux-block: (64 commits)
  lightnvm: pblk: Replace guid_copy() with export_guid()/import_guid()
  lightnvm: fix unnecessary NULL check warnings
  nvme-tcp: fix crash triggered with a dataless request submission
  block: Replace lkml.org links with lore
  nbd: Convert to DEFINE_SHOW_ATTRIBUTE
  nvme: add 48-bit DMA address quirk for Amazon NVMe controllers
  nvme-hwmon: rework to avoid devm allocation
  nvmet: remove else at the end of the function
  nvmet: add nvmet_req_subsys() helper
  nvmet: use min of device_path and disk len
  nvmet: use invalid cmd opcode helper
  nvmet: use invalid cmd opcode helper
  nvmet: add helper to report invalid opcode
  nvmet: remove extra variable in id-ns handler
  nvmet: make nvmet_find_namespace() req based
  nvmet: return uniform error for invalid ns
  nvmet: set status to 0 in case for invalid nsid
  nvmet-fc: add a missing __rcu annotation to nvmet_fc_tgt_assoc.queues
  nvme-multipath: set nr_zones for zoned namespaces
  nvmet-tcp: fix potential race of tcp socket closing accept_work
  ...

Pull core block updates from Jens Axboe:
 "Another nice round of removing more code than what is added, mostly
  due to Christoph's relentless pursuit of tech debt removal/cleanups.
  This pull request contains:

   - Two series of BFQ improvements (Paolo, Jan, Jia)

   - Block iov_iter improvements (Pavel)

   - bsg error path fix (Pan)

   - blk-mq scheduler improvements (Jan)

   - -EBUSY discard fix (Jan)

   - bvec allocation improvements (Ming, Christoph)

   - bio allocation and init improvements (Christoph)

   - Store bdev pointer in bio instead of gendisk + partno (Christoph)

   - Block trace point cleanups (Christoph)

   - hard read-only vs read-only split (Christoph)

   - Block based swap cleanups (Christoph)

   - Zoned write granularity support (Damien)

   - Various fixes/tweaks (Chunguang, Guoqing, Lei, Lukas, Huhai)"

* tag 'for-5.12/block-2021-02-17' of git://git.kernel.dk/linux-block: (104 commits)
  mm: simplify swapdev_block
  sd_zbc: clear zone resources for non-zoned case
  block: introduce blk_queue_clear_zone_settings()
  zonefs: use zone write granularity as block size
  block: introduce zone_write_granularity limit
  block: use blk_queue_set_zoned in add_partition()
  nullb: use blk_queue_set_zoned() to setup zoned devices
  nvme: cleanup zone information initialization
  block: document zone_append_max_bytes attribute
  block: use bi_max_vecs to find the bvec pool
  md/raid10: remove dead code in reshape_request
  block: mark the bio as cloned in bio_iov_bvec_set
  block: set BIO_NO_PAGE_REF in bio_iov_bvec_set
  block: remove a layer of indentation in bio_iov_iter_get_pages
  block: turn the nr_iovecs argument to bio_alloc* into an unsigned short
  block: remove the 1 and 4 vec bvec_slabs entries
  block: streamline bvec_alloc
  block: factor out a bvec_alloc_gfp helper
  block: move struct biovec_slab to bio.c
  block: reuse BIO_INLINE_VECS for integrity bvecs
  ...

Pull libata updates from Jens Axboe:
 "Regulartors management addition from Florian, and a trivial change to
  avoid comma separated statements from Joe"

* tag 'for-5.12/libata-2021-02-17' of git://git.kernel.dk/linux-block:
  ata: Avoid comma separated statements
  ata: ahci_brcm: Add back regulators management

Pull oprofile and dcookies removal from Viresh Kumar:
 "Remove oprofile and dcookies support

  The 'oprofile' user-space tools don't use the kernel OPROFILE support
  any more, and haven't in a long time. User-space has been converted to
  the perf interfaces.

  The dcookies stuff is only used by the oprofile code. Now that
  oprofile's support is getting removed from the kernel, there is no
  need for dcookies as well.

  Remove kernel's old oprofile and dcookies support"

* tag 'oprofile-removal-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux:
  fs: Remove dcookies support
  drivers: Remove CONFIG_OPROFILE support
  arch: xtensa: Remove CONFIG_OPROFILE support
  arch: x86: Remove CONFIG_OPROFILE support
  arch: sparc: Remove CONFIG_OPROFILE support
  arch: sh: Remove CONFIG_OPROFILE support
  arch: s390: Remove CONFIG_OPROFILE support
  arch: powerpc: Remove oprofile
  arch: powerpc: Stop building and using oprofile
  arch: parisc: Remove CONFIG_OPROFILE support
  arch: mips: Remove CONFIG_OPROFILE support
  arch: microblaze: Remove CONFIG_OPROFILE support
  arch: ia64: Remove rest of perfmon support
  arch: ia64: Remove CONFIG_OPROFILE support
  arch: hexagon: Don't select HAVE_OPROFILE
  arch: arc: Remove CONFIG_OPROFILE support
  arch: arm: Remove CONFIG_OPROFILE support
  arch: alpha: Remove CONFIG_OPROFILE support

Pull xfs updates from Darrick Wong:
 "There's a lot going on this time, which seems about right for this
  drama-filled year.

  Community developers added some code to speed up freezing when
  read-only workloads are still running, refactored the logging code,
  added checks to prevent file extent counter overflow, reduced iolock
  cycling to speed up fsync and gc scans, and started the slow march
  towards supporting filesystem shrinking.

  There's a huge refactoring of the internal speculative preallocation
  garbage collection code which fixes a bunch of bugs, makes the gc
  scheduling per-AG and hence multithreaded, and standardizes the retry
  logic when we try to reserve space or quota, can't, and want to
  trigger a gc scan. We also enable multithreaded quotacheck to reduce
  mount times further. This is also preparation for background file gc,
  which may or may not land for 5.13.

  We also fixed some deadlocks in the rename code, fixed a quota
  accounting leak when FSSETXATTR fails, restored the behavior that
  write faults to an mmap'd region actually cause a SIGBUS, fixed a bug
  where sgid directory inheritance wasn't quite working properly, and
  fixed a bug where symlinks weren't working properly in ecryptfs. We
  also now advertise the inode btree counters feature that was
  introduced two cycles ago.

  Summary:

   - Fix an ABBA deadlock when renaming files on overlayfs.

   - Make sure that we can't overflow the inode extent counters when
     adding to or removing extents from a file.

   - Make directory sgid inheritance work the same way as all the other
     filesystems.

   - Don't drain the buffer cache on freeze and ro remount, which should
     reduce the amount of time if read-only workloads are continuing
     during the freeze.

   - Fix a bug where symlink size isn't reported to the vfs in ecryptfs.

   - Disentangle log cleaning from log covering. This refactoring sets
     us up for future changes to the log, though for now it simply means
     that we can use covering for freezes, and cleaning becomes
     something we only do at unmount.

   - Speed up file fsyncs by reducing iolock cycling.

   - Fix delalloc blocks leaking when changing the project id fails
     because of input validation errors in FSSETXATTR.

   - Fix oversized quota reservation when converting unwritten extents
     during a DAX write.

   - Create a transaction allocation helper function to standardize the
     idiom of allocating a transaction, reserving blocks, locking
     inodes, and reserving quota. Replace all the open-coded logic for
     file creation, file ownership changes, and file modifications to
     use them.

   - Actually shut down the fs if the incore quota reservations get
     corrupted.

   - Fix background block garbage collection scans to not block and to
     actually clean out CoW staging extents properly.

   - Run block gc scans when we run low on project quota.

   - Use the standardized transaction allocation helpers to make it so
     that ENOSPC and EDQUOT errors during reservation will back out,
     invoke the block gc scanner, and try again. This is preparation for
     introducing background inode garbage collection in the next cycle.

   - Combine speculative post-EOF block garbage collection with
     speculative copy on write block garbage collection.

   - Enable multithreaded quotacheck.

   - Allow sysadmins to tweak the CPU affinities and maximum concurrency
     levels of quotacheck and background blockgc worker pools.

   - Expose the inode btree counter feature in the fs geometry ioctl.

   - Cleanups of the growfs code in preparation for starting work on
     filesystem shrinking.

   - Fix all the bloody gcc warnings that the maintainer knows about. :P

   - Fix a RST syntax error.

   - Don't trigger bmbt corruption assertions after the fs shuts down.

   - Restore behavior of forcing SIGBUS on a shut down filesystem when
     someone triggers a mmap write fault (or really, any buffered
     write)"

* tag 'xfs-5.12-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (85 commits)
  xfs: consider shutdown in bmapbt cursor delete assert
  xfs: fix boolreturn.cocci warnings
  xfs: restore shutdown check in mapped write fault path
  xfs: fix rst syntax error in admin guide
  xfs: fix incorrect root dquot corruption error when switching group/project quota types
  xfs: get rid of xfs_growfs_{data,log}_t
  xfs: rename `new' to `delta' in xfs_growfs_data_private()
  libxfs: expose inobtcount in xfs geometry
  xfs: don't bounce the iolock between free_{eof,cow}blocks
  xfs: expose the blockgc workqueue knobs publicly
  xfs: parallelize block preallocation garbage collection
  xfs: rename block gc start and stop functions
  xfs: only walk the incore inode tree once per blockgc scan
  xfs: consolidate the eofblocks and cowblocks workers
  xfs: consolidate incore inode radix tree posteof/cowblocks tags
  xfs: remove trivial eof/cowblocks functions
  xfs: hide xfs_icache_free_cowblocks
  xfs: hide xfs_icache_free_eofblocks
  xfs: relocate the eofb/cowb workqueue functions
  xfs: set WQ_SYSFS on all workqueues in debug mode
  ...

Pull iomap updates from Darrick Wong:
 "The big change in this cycle is some new code to make it possible for
  XFS to try unaligned directio overwrites without taking locks. If the
  block is fully written and within EOF (i.e. doesn't require any
  further fs intervention) then we can let the unlocked write proceed.
  If not, we fall back to synchronizing direct writes.

  Summary:

   - Adjust the final parameter of iomap_dio_rw.

   - Add a new flag to request that iomap directio writes return EAGAIN
     if the write is not a pure overwrite within EOF; this will be used
     to reduce lock contention with unaligned direct writes on XFS.

   - Amend XFS' directio code to eliminate exclusive locking for
     unaligned direct writes if the circumstances permit"

* tag 'iomap-5.12-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: reduce exclusive locking on unaligned dio
  xfs: split the unaligned DIO write code out
  xfs: improve the reflink_bounce_dio_write tracepoint
  xfs: simplify the read/write tracepoints
  xfs: remove the buffered I/O fallback assert
  xfs: cleanup the read/write helper naming
  xfs: make xfs_file_aio_write_checks IOCB_NOWAIT-aware
  xfs: factor out a xfs_ilock_iocb helper
  iomap: add a IOMAP_DIO_OVERWRITE_ONLY flag
  iomap: pass a flags argument to iomap_dio_rw
  iomap: rename the flags variable in __iomap_dio_rw

Pull pstore fix from Kees Cook:
 "Fix a CONFIG typo (Jiri Bohac)"

* tag 'pstore-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore: Fix typo in compression option name

Pull fsverity updates from Eric Biggers:
 "Add an ioctl which allows reading fs-verity metadata from a file.

  This is useful when a file with fs-verity enabled needs to be served
  somewhere, and the other end wants to do its own fs-verity compatible
  verification of the file. See the commit messages for details.

  This new ioctl has been tested using new xfstests I've written for it"

* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fs-verity: support reading signature with ioctl
  fs-verity: support reading descriptor with ioctl
  fs-verity: support reading Merkle tree with ioctl
  fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl
  fs-verity: don't pass whole descriptor to fsverity_verify_signature()
  fs-verity: factor out fsverity_get_descriptor()

Pull nfsd updates from Chuck Lever:

 - Update NFSv2 and NFSv3 XDR decoding functions

 - Further improve support for re-exporting NFS mounts

 - Convert NFSD stats to per-CPU counters

 - Add batch Receive posting to the server's RPC/RDMA transport

* tag 'nfsd-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (65 commits)
  nfsd: skip some unnecessary stats in the v4 case
  nfs: use change attribute for NFS re-exports
  NFSv4_2: SSC helper should use its own config.
  nfsd: cstate->session->se_client -> cstate->clp
  nfsd: simplify nfsd4_check_open_reclaim
  nfsd: remove unused set_client argument
  nfsd: find_cpntf_state cleanup
  nfsd: refactor set_client
  nfsd: rename lookup_clientid->set_client
  nfsd: simplify nfsd_renew
  nfsd: simplify process_lock
  nfsd4: simplify process_lookup1
  SUNRPC: Correct a comment
  svcrdma: DMA-sync the receive buffer in svc_rdma_recvfrom()
  svcrdma: Reduce Receive doorbell rate
  svcrdma: Deprecate stat variables that are no longer used
  svcrdma: Restore read and write stats
  svcrdma: Convert rdma_stat_sq_starve to a per-CPU counter
  svcrdma: Convert rdma_stat_recv to a per-CPU counter
  svcrdma: Refactor svc_rdma_init() and svc_rdma_clean_up()
  ...

Pull erofs updates from Gao Xiang:
 "This contains a somewhat important but rarely reproduced fix reported
  month ago for platforms which have weak memory model (e.g. arm64).

  The root cause is that test_bit/set_bit atomic operations are actually
  implemented in relaxed forms, and uninitialized fields governed by an
  atomic bit could be observed in advance due to memory reordering thus
  memory barrier pairs should be used.

  There is also a trivial fix of crafted blkszbits generated by
  syzkaller.

  Summary:

   - fix shift-out-of-bounds of crafted blkszbits generated by syzkaller

   - ensure initialized fields can only be observed after bit is set"

* tag 'erofs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: initialized fields can only be observed after bit is set
  erofs: fix shift-out-of-bounds of blkszbits

Pull f2fs updates from Jaegeuk Kim:
 "We've added two major features: 1) compression level and 2)
  checkpoint_merge, in this round.

  Compression level expands 'compress_algorithm' mount option to accept
  parameter as format of <algorithm>:<level>, by this way, it gives a
  way to allow user to do more specified config on lz4 and zstd
  compression level, then f2fs compression can provide higher compress
  ratio.

  checkpoint_merge creates a kernel daemon and makes it to merge
  concurrent checkpoint requests as much as possible to eliminate
  redundant checkpoint issues. Plus, we can eliminate the sluggish issue
  caused by slow checkpoint operation when the checkpoint is done in a
  process context in a cgroup having low i/o budget and cpu shares.

  Enhancements:
   - add compress level for lz4 and zstd in mount option
   - checkpoint_merge mount option
   - deprecate f2fs_trace_io

  Bug fixes:
   - flush data when enabling checkpoint back
   - handle corner cases of mount options
   - missing ACL update and lock for I_LINKABLE flag
   - attach FIEMAP_EXTENT_MERGED in f2fs_fiemap
   - fix potential deadlock in compression flow
   - fix wrong submit_io condition

  As usual, we've cleaned up many code flows and fixed minor bugs"

* tag 'f2fs-for-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (32 commits)
  Documentation: f2fs: fix typo s/automaic/automatic
  f2fs: give a warning only for readonly partition
  f2fs: don't grab superblock freeze for flush/ckpt thread
  f2fs: add ckpt_thread_ioprio sysfs node
  f2fs: introduce checkpoint_merge mount option
  f2fs: relocate inline conversion from mmap() to mkwrite()
  f2fs: fix a wrong condition in __submit_bio
  f2fs: remove unnecessary initialization in xattr.c
  f2fs: fix to avoid inconsistent quota data
  f2fs: flush data when enabling checkpoint back
  f2fs: deprecate f2fs_trace_io
  f2fs: Remove readahead collision detection
  f2fs: remove unused stat_{inc, dec}_atomic_write
  f2fs: introduce sb_status sysfs node
  f2fs: fix to use per-inode maxbytes
  f2fs: compress: fix potential deadlock
  libfs: unexport generic_ci_d_compare() and generic_ci_d_hash()
  f2fs: fix to set/clear I_LINKABLE under i_lock
  f2fs: fix null page reference in redirty_blocks
  f2fs: clean up post-read processing
  ...

Pull btrfs updates from David Sterba:
 "This brings updates of space handling, performance improvements or bug
  fixes. The subpage block size and zoned mode features have reached
  state where they're usable but with limitations.

  Performance or related:

   - do not block on deleted block group mutex in the cleaner, avoids
     some long stalls

   - improved flushing: make it work better with ticket space
     reservations and avoid excessive transaction commits in some
     scenarios, slightly improves throughput for random write load

   - preemptive background flushing: separate the logic from ticket
     reservations, improve the accounting and decisions when to flush in
     low space conditions

   - less lock contention related to running delayed refs, let just one
     thread do the flushing when there are many inside transaction
     commit

   - dbench workload improvements: avoid unnecessary work when logging
     inodes, fewer fallbacks to transaction commit and thus less waiting
     for it (+7% throughput, -20% latency)

  Core:

   - subpage block size
      - currently read-only support
      - refactor and generalize code where sectorsize is assumed to be
        page size, add the subpage handling everywhere
      - the read-write support is on the way, page sizes are still
        limited to 4K or 64K

   - zoned mode, first working version but with limitations
      - SMR/ZBC/ZNS friendly allocation mode, utilizing the "no fixed
        location for structures" and chunked allocation
      - superblock as the only fixed data structure needs special
        handling, uses 2 consecutive zones as a ring buffer
      - tree-log support with a dedicated block group to avoid unordered
        writes
      - emulated zones on non-zoned devices
      - not yet working
      - all non-single block group profiles, requires more zone write
        pointer synchronization between the multiple block groups
      - fitrim due to dependency on space cache, can be implemented

  Fixes:

   - ref-verify: proper tree owner and node level tracking

   - fix pinned byte accounting, causing some early ENOSPC now more
     likely due to other changes in delayed refs

  Other:

   - error handling fixes and improvements

   - more error injection points

   - more function documentation

   - more and updated tracepoints

   - subset of W=1 checked by default

   - update comments to allow more automatic kdoc parameter checks"

* tag 'for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (144 commits)
  btrfs: zoned: enable to mount ZONED incompat flag
  btrfs: zoned: deal with holes writing out tree-log pages
  btrfs: zoned: reorder log node allocation on zoned filesystem
  btrfs: zoned: serialize log transaction on zoned filesystems
  btrfs: zoned: extend zoned allocator to use dedicated tree-log block group
  btrfs: split alloc_log_tree()
  btrfs: zoned: relocate block group to repair IO failure in zoned filesystems
  btrfs: zoned: enable relocation on a zoned filesystem
  btrfs: zoned: support dev-replace in zoned filesystems
  btrfs: zoned: implement copying for zoned device-replace
  btrfs: zoned: implement cloning for zoned device-replace
  btrfs: zoned: mark block groups to copy for device-replace
  btrfs: zoned: do not use async metadata checksum on zoned filesystems
  btrfs: zoned: wait for existing extents before truncating
  btrfs: zoned: serialize metadata IO
  btrfs: zoned: introduce dedicated data write path for zoned filesystems
  btrfs: zoned: enable zone append writing for direct IO
  btrfs: zoned: use ZONE_APPEND write for zoned mode
  btrfs: save irq flags when looking up an ordered extent
  btrfs: zoned: cache if block group is on a sequential zone
  ...

Pull AFFS fix from David Sterba:
 "One minor fix for error handling in rename exchange"

* tag 'affs-for-5.12-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  fs/affs: release old buffer head on error path

Pull jfs updates from David Kleikamp:
 "A few jfs fixes"

* tag 'jfs-5.12' of git://github.com/kleikamp/linux-shaggy:
  fs/jfs: fix potential integer overflow on shift of a int
  jfs: turn diLog(), dataLog() and txLog() into void functions
  JFS: more checks for invalid superblock

Pull fcntl fix from Jeff Layton.

* tag 'locks-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  fcntl: make F_GETOWN(EX) return 0 on dead owner task

Pull namei updates from Al Viro:
 "Most of that pile is LOOKUP_CACHED series; the rest is a couple of
  misc cleanups in the general area...

  There's a minor bisect hazard in the end of series, and normally I
  would've just folded the fix into the previous commit, but this branch
  is shared with Jens' tree, with stuff on top of it in there, so that
  would've required rebases outside of vfs.git"

* 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix handling of nd->depth on LOOKUP_CACHED failures in try_to_unlazy*
  fs: expose LOOKUP_CACHED through openat2() RESOLVE_CACHED
  fs: add support for LOOKUP_CACHED
  saner calling conventions for unlazy_child()
  fs: make unlazy_walk() error handling consistent
  fs/namei.c: Remove unlikely of status being -ECHILD in lookup_fast()
  do_tmpfile(): don't mess with finish_open()

Pull ELF compat updates from Al Viro:
 "Sanitizing ELF compat support, especially for triarch architectures:

   - X32 handling cleaned up

   - MIPS64 uses compat_binfmt_elf.c both for O32 and N32 now

   - Kconfig side of things regularized

  Eventually I hope to have compat_binfmt_elf.c killed, with both native
  and compat built from fs/binfmt_elf.c, with -DELF_BITS={64,32} passed
  by kbuild, but that's a separate story - not included here"

* 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  get rid of COMPAT_ELF_EXEC_PAGESIZE
  compat_binfmt_elf: don't bother with undef of ELF_ARCH
  Kconfig: regularize selection of CONFIG_BINFMT_ELF
  mips compat: switch to compat_binfmt_elf.c
  mips: don't bother with ELF_CORE_EFLAGS
  mips compat: don't bother with ELF_ET_DYN_BASE
  mips: KVM_GUEST makes no sense for 64bit builds...
  mips: kill unused definitions in binfmt_elf[on]32.c
  mips binfmt_elf*32.c: use elfcore-compat.h
  x32: make X32, !IA32_EMULATION setups able to execute x32 binaries
  [amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly
  elf_prstatus: collect the common part (everything before pr_reg) into a struct
  binfmt_elf: partially sanitize PRSTATUS_SIZE and SET_PR_FPVALID

Pull sendfile updates from Al Viro:
 "Make sendfile() to pipe destination do the right thing, should make
  'fs/pipe: allow sendfile() to pipe again' redundant"

* 'work.sendfile' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  teach sendfile(2) to handle send-to-pipe directly
  take the guts of file-to-pipe splice into a helper function
  do_splice_to(): move the logics for limiting the read length in

Pull PNP updates from Rafael Wysocki:
 "These make two janitorial changes of the code.

  Specifics:

   - Add printf annotation to a logging function (Tom Rix)

   - Use DEFINE_SPINLOCK() for defining a spinlock so as to initialize
     it statically (Zheng Yongjun)"

* tag 'pnp-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PNP: pnpbios: Use DEFINE_SPINLOCK() for spinlock
  PNP: add printf attribute to log function

Pull ACPI updates from Rafael Wysocki:
 "These update the ACPICA code in the kernel to upstream revision
  20210105, fix and clean up the handling of device properties, add
  support for setting global profile of the platform, clean up device
  enumeration, the CPPC library, the APEI support and more, update the
  documentation, consolidate the printing of messages in several places
  and make assorted janitorial changes.

  Specifics:

   - Update ACPICA code in the kernel to upstream revision 20201113 with
     changes as follows:

      * Remove the MTMR (Mid-Timer) table (Al Stone).
      * Remove the VRTC table (Al Stone).
      * Add type casts for string functions (Bob Moore).
      * Update all copyrights to 2021 (Bob Moore).
      * Fix exception code class checks (Maximilian Luz).
      * Clean up exception code class checks (Maximilian Luz).
      * Fix -Wfallthrough (Nick Desaulniers).

   - Add support for setting and reading global profile of the platform
     along with documentation (Mark Pearson, Hans de Goede, Jiaxun
     Yang).

   - Fix fwnode properties matching and clean up the code handling
     device properties and its documentation (Rafael Wysocki, Andy
     Shevchenko).

   - Clean up ACPI-based device enumeration code (Rafael Wysocki).

   - Clean up the CPPC support library code (Ionela Voinescu).

   - Clean up the APEI support code (Yang Li, Yazen Ghannam).

   - Update GPIO-related properties documentation (Flavio Suligoi).

   - Consolidate and clean up the printing of messages in several places
     (Rafael Wysocki).

   - Fix error code path in configfs handling code (Qinglang Miao).

   - Use DEVICE_ATTR_<RW|RO|WO> macros where applicable (Dwaipayan Ray).

   - Replace tests for !ACPI_FAILURE with tests for ACPI_SUCCESS in
     multiple places (Bjorn Helgaas)"

* tag 'acpi-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (44 commits)
  ACPI: property: Satisfy kernel doc validator (part 2)
  ACPI: property: Satisfy kernel doc validator (part 1)
  ACPI: property: Make acpi_node_prop_read() static
  ACPI: property: Remove dead code
  ACPI: property: Fix fwnode string properties matching
  ACPI: OSL: Clean up printing messages
  ACPI: OSL: Rework acpi_check_resource_conflict()
  ACPI: APEI: ERST: remove unneeded semicolon
  ACPI: thermal: Clean up printing messages
  ACPI: video: Clean up printing messages
  ACPI: button: Clean up printing messages
  ACPI: battery: Clean up printing messages
  ACPI: AC: Clean up printing messages
  ACPI: bus: Drop ACPI_BUS_COMPONENT which is not used any more
  ACPI: utils: Clean up printing messages
  ACPI: scan: Clean up printing messages
  ACPI: bus: Clean up printing messages
  ACPI: PM: Clean up printing messages
  ACPI: power: Clean up printing messages
  ACPI: APEI: Add is_generic_error() to identify GHES sources
  ...

Pull power management updates from Rafael Wysocki:
 "These add a new power capping facility allowing aggregate power
  constraints to be applied to sets of devices in a distributed manner,
  add a new CPU ID to the RAPL power capping driver and improve it, drop
  a cpufreq driver belonging to a platform that is not supported any
  more, drop two redundant cpufreq driver flags, update cpufreq drivers
  (intel_pstate, brcmstb-avs, qcom-hw), update the operating performance
  points (OPP) framework (code cleanups, new helpers, devfreq-related
  modifications), clean up devfreq, extend the PM clock layer, update
  the cpupower utility and make assorted janitorial changes.

  Specifics:

   - Add new power capping facility called DTPM (Dynamic Thermal Power
     Management), based on the existing power capping framework, to
     allow aggregate power constraints to be applied to sets of devices
     in a distributed manner, along with a CPU backend driver based on
     the Energy Model (Daniel Lezcano, Dan Carpenter, Colin Ian King).

   - Add AlderLake Mobile support to the Intel RAPL power capping driver
     and make it use the topology interface when laying out the system
     topology (Zhang Rui, Yunfeng Ye).

   - Drop the cpufreq tango driver belonging to a platform that is not
     supported any more (Arnd Bergmann).

   - Drop the redundant CPUFREQ_STICKY and CPUFREQ_PM_NO_WARN cpufreq
     driver flags (Viresh Kumar).

   - Update cpufreq drivers:

      * Fix max CPU frequency discovery in the intel_pstate driver and
        make janitorial changes in it (Chen Yu, Rafael Wysocki, Nigel
        Christian).

      * Fix resource leaks in the brcmstb-avs-cpufreq driver (Christophe
        JAILLET).

      * Make the tegra20 driver use the resource-managed API (Dmitry
        Osipenko).

      * Enable boost support in the qcom-hw driver (Shawn Guo).

   - Update the operating performance points (OPP) framework:

      * Clean up the OPP core (Dmitry Osipenko, Viresh Kumar).

      * Extend the OPP API by adding new helpers to it (Dmitry Osipenko,
        Viresh Kumar).

      * Allow required OPPs to be used for devfreq devices and update
        the devfreq governor code accordingly (Saravana Kannan).

      * Prepare the framework for introducing new dev_pm_opp_set_opp()
        helper (Viresh Kumar).

      * Drop dev_pm_opp_set_bw() and update related drivers (Viresh
        Kumar).

      * Allow lazy linking of required-OPPs (Viresh Kumar).

   - Simplify and clean up devfreq somewhat (Lukasz Luba, Yang Li,
     Pierre Kuo).

   - Update the generic power domains (genpd) framework:

      * Use device's next wakeup to determine domain idle state (Lina
        Iyer).

      * Improve initialization and debug (Dmitry Osipenko).

      * Simplify computations (Abaci Team).

   - Make janitorial changes in the core code handling system sleep and
     PM-runtime (Bhaskar Chowdhury, Bjorn Helgaas, Rikard Falkeborn,
     Zqiang).

   - Update the MAINTAINERS entry for the exynos cpuidle driver and drop
     DEBUG definition from intel_idle (Krzysztof Kozlowski, Tom Rix).

   - Extend the PM clock layer to cover clocks that must sleep (Nicolas
     Pitre).

   - Update the cpupower utility:

      * Update cpupower command, add support for AMD family 0x19 and
        clean up the code to remove many of the family checks to make
        future family updates easier (Nathan Fontenot, Robert Richter).

      * Add Makefile dependencies for install targets to allow building
        cpupower in parallel rather than serially (Ivan Babrou).

   - Make janitorial changes in power management Kconfig (Lukasz Luba)"

* tag 'pm-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  MAINTAINERS: cpuidle: exynos: include header in file pattern
  powercap: intel_rapl: Use topology interface in rapl_init_domains()
  powercap: intel_rapl: Use topology interface in rapl_add_package()
  PM: sleep: Constify static struct attribute_group
  PM: Kconfig: remove unneeded "default n" options
  PM: EM: update Kconfig description and drop "default n" option
  cpufreq: Remove unused flag CPUFREQ_PM_NO_WARN
  cpufreq: Remove CPUFREQ_STICKY flag
  PM / devfreq: Add required OPPs support to passive governor
  PM / devfreq: Cache OPP table reference in devfreq
  OPP: Add function to look up required OPP's for a given OPP
  PM / devfreq: rk3399_dmc: Remove unneeded semicolon
  opp: Replace ENOTSUPP with EOPNOTSUPP
  opp: Fix "foo * bar" should be "foo *bar"
  opp: Don't ignore clk_get() errors other than -ENOENT
  opp: Update bandwidth requirements based on scaling up/down
  opp: Allow lazy-linking of required-opps
  opp: Remove dev_pm_opp_set_bw()
  devfreq: tegra30: Migrate to dev_pm_opp_set_opp()
  drm: msm: Migrate to dev_pm_opp_set_opp()
  ...

Pull staging and IIO driver updates from Greg KH:
 "Here is the "big" set of staging and IIO driver patches for 5.12-rc1.

  Nothing really huge in here, the number of staging tree patches has
  gone down for a bit, maybe there's only so much churn to happen in
  here at the moment.

  The IIO changes are:

   - new drivers

   - new DT bindings

   - new iio driver features

  with full details in the shortlog.

  The staging driver patches are just a lot of tiny coding style
  cleanups, along with some semi-larger hikey driver cleanups as those
  are _almost_ good enough to get out of the staging tree, but will
  probably have to wait until 5.13 to have happen.

  All of these have been in linux-next with no reported issues"

* tag 'staging-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (189 commits)
  staging: hikey9xx: Fix alignment of function parameters
  staging: greybus: Fixed a misspelling in hid.c
  staging: wimax/i2400m: fix some byte order issues found by sparse
  staging: wimax: i2400m: fix some incorrect type warnings
  staging: greybus: minor code style fix
  staging:wlan-ng: use memdup_user instead of kmalloc/copy_from_user
  staging:r8188eu: use IEEE80211_FCTL_* kernel definitions
  staging: rtl8192e: remove multiple blank lines
  staging: greybus: Fixed alignment issue in hid.c
  staging: wfx: remove unused included header files
  staging: nvec: minor coding style fix
  staging: wimax: Fix some coding style problem
  staging: fbtft: add tearing signal detect
  staging: vt6656: Fixed issue with alignment in rf.c
  staging: qlge: Remove duplicate word in comment
  staging: rtl8723bs: remove obsolete commented out code
  staging: rtl8723bs: fix function comments to follow kernel-doc
  staging: wfx: avoid defining array of flexible struct
  staging: rtl8723bs: Replace one-element array with flexible-array member in struct ndis_80211_var_ie
  staging: Replace lkml.org links with lore
  ...

Pull USB and Thunderbolt updates from Greg KH:
 "Here is the big set of USB and Thunderbolt driver changes for
  5.12-rc1.

  It's been an active set of development in these subsystems for the
  past few months:

   - loads of typec features added for new hardware

   - xhci features and bugfixes

   - dwc3 features added for more hardware support

   - dwc2 fixes and new hardware support

   - cdns3 driver updates for more hardware support

   - gadget driver cleanups and minor fixes

   - usb-serial fixes, new driver, and more devices supported

   - thunderbolt feature additions for new hardware

   - lots of other tiny fixups and additions

  The chrome driver changes are in here as well, as they depended on
  some of the typec changes, and the maintainer acked them.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (300 commits)
  dt-bindings: usb: mediatek: musb: add mt8516 compatbile
  dt-bindings: usb: mtk-xhci: add compatible for mt2701 and mt7623
  dt-bindings: usb: mtk-xhci: add optional assigned clock properties
  Documentation: connector: Update the description of sink-vdos
  usb: misc: usb3503: Fix logic in usb3503_init()
  dt-bindings: usb: usb-device: fix typo in required properties
  usb: Replace lkml.org links with lore
  dt-bindings: usb: dwc3: add description for rk3328
  dt-bindings: usb: convert rockchip,dwc3.txt to yaml
  usb: quirks: add quirk to start video capture on ELMO L-12F document camera reliable
  USB: quirks: sort quirk entries
  USB: serial: drop bogus to_usb_serial_port() checks
  USB: serial: make remove callback return void
  USB: serial: drop if with an always false condition
  usb: gadget: Assign boolean values to a bool variable
  usb: typec: tcpm: Get Sink VDO from fwnode
  dt-bindings: connector: Add SVDM VDO properties
  usb: typec: displayport: Fill the negotiated SVDM Version in the header
  usb: typec: ucsi: Determine common SVDM Version
  usb: typec: tcpm: Determine common SVDM Version
  ...

Pull tty/serial driver updates from Greg KH:
 "Here is the big set of tty/serial driver changes for 5.12-rc1.

  Nothing huge, just lots of good cleanups and additions:

   - n_tty line discipline cleanups

   - vt core cleanups and reworks to make the code more "modern"

   - stm32 driver additions

   - tty led support added to the tty core and led layer

   - minor serial driver fixups and additions

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (54 commits)
  serial: core: Remove BUG_ON(in_interrupt()) check
  vt_ioctl: Remove in_interrupt() check
  dt-bindings: serial: imx: Switch to my personal address
  vt: keyboard, use new API for keyboard_tasklet
  serial: stm32: improve platform_get_irq condition handling in init_port
  serial: ifx6x60: Remove driver for deprecated platform
  tty: fix up iterate_tty_read() EOVERFLOW handling
  tty: fix up hung_up_tty_read() conversion
  tty: fix up hung_up_tty_write() conversion
  tty: teach the n_tty ICANON case about the new "cookie continuations" too
  tty: teach n_tty line discipline about the new "cookie continuations"
  tty: clean up legacy leftovers from n_tty line discipline
  tty: implement read_iter
  tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
  serial: remove sirf prima/atlas driver
  serial: mxs-auart: Remove <asm/cacheflush.h>
  serial: mxs-auart: Remove serial_mxs_probe_dt()
  serial: fsl_lpuart: Use of_device_get_match_data()
  dt-bindings: serial: renesas,hscif: Add r8a779a0 support
  tty: serial: Drop unused efm32 serial driver
  ...