THERMAL_NETLINK depends on NET and since 'select' does not follow
any dependency chain, INTEL_HFI_THERMAL also should depend on NET.

Fix one Kconfig warning and 48 subsequent build errors:

WARNING: unmet direct dependencies detected for THERMAL_NETLINK
  Depends on [n]: THERMAL [=y] && NET [=n]
  Selected by [y]:
  - INTEL_HFI_THERMAL [=y] && THERMAL [=y] && (X86 [=y] || X86_INTEL_QUARK [=n] || COMPILE_TEST [=y]) && CPU_SUP_INTEL [=y] && X86_THERMAL_VECTOR [=y]

Fixes: bd30cdfd ("thermal: intel: hfi: Notify user space for HFI events")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

When building with CONFIG_THERMAL_NETLINK=n, there is a spew of warnings
along the lines of:

  In file included from drivers/thermal/thermal_core.c:27:
  In file included from drivers/thermal/thermal_core.h:15:
  drivers/thermal/thermal_netlink.h:113:71: warning: declaration of 'struct cpu_capability' will not be visible outside of this function [-Wvisibility]
  static inline int thermal_genl_cpu_capability_event(int count, struct cpu_capability *caps)
                                                                        ^
  1 warning generated.

'struct cpu_capability' is not forward declared anywhere in the header.
As it turns out, this should really be 'struct thermal_genl_cpu_caps',
which silences the warning and makes the parameter types of the stub
match the full function.

Fixes: e4b1eb24 ("thermal: netlink: Add a new event to notify CPU capabilities change")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

When the hardware issues an HFI event, relay a notification to user space.
This allows user space to respond by reading performance and efficiency of
each CPU and take appropriate action.

For example, when the performance and efficiency of a CPU is 0, user space
can either offline the CPU or inject idle. Also, if user space notices a
downward trend in performance, it may proactively adjust power limits to
avoid future situations in which performance drops to 0.

To avoid excessive notifications, the rate is limited by one HZ per event.
To limit the netlink message size, send parameters for up to 16 CPUs in a
single message. If there are more than 16 CPUs, issue as many messages as
needed to notify the status of all CPUs.

In the HFI specification, both performance and efficiency capabilities are
defined in the [0, 255] range. The existing implementations of HFI hardware
do not scale the maximum values to 255. Since userspace cares about
capability values that are either 0 or show a downward/upward trend, this
fact does not matter much. Relative changes in capabilities are enough. To
comply with the thermal netlink ABI, scale both performance and efficiency
capabilities to the [0, 1023] interval.
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add a new netlink event to notify change in CPU capabilities in terms of
performance and efficiency.

Firmware may change CPU capabilities as a result of thermal events in the
system or to account for changes in the TDP (thermal design power) level.

This notification type will allow user space to avoid running workloads
on certain CPUs or proactively adjust power limits to avoid future events.

The netlink message consists of a nested attribute
(THERMAL_GENL_ATTR_CPU_CAPABILITY) with three attributes:

 * THERMAL_GENL_ATTR_CPU_CAPABILITY_ID (type u32):
   -- logical CPU number
 * THERMAL_GENL_ATTR_CPU_CAPABILITY_PERFORMANCE (type u32):
   -- Scaled performance from 0-1023
 * THERMAL_GENL_ATTR_CPU_CAPABILITY_EFFICIENCY (type u32):
   -- Scaled efficiency from 0-1023
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

When hardware wants to inform the operating system about updates in the HFI
table, it issues a package-level thermal event interrupt. For this,
hardware has new interrupt and status bits in the IA32_PACKAGE_THERM_
INTERRUPT and IA32_PACKAGE_THERM_STATUS registers. The existing thermal
throttle driver already handles thermal event interrupts: it initializes
the thermal vector of the local APIC as well as per-CPU and package-level
interrupt reporting. It also provides routines to service such interrupts.
Extend its functionality to also handle HFI interrupts.

The frequency of the thermal HFI interrupt is specific to each processor
model. On some processors, a single interrupt happens as soon as the HFI is
enabled and hardware will never update HFI capabilities afterwards. On
other processors, thermal and power constraints may cause thermal HFI
interrupts every tens of milliseconds.

To not overwhelm consumers of the HFI data, use delayed work to throttle
the rate at which HFI updates are processed. Use a dedicated workqueue to
not overload system_wq if hardware issues many HFI updates.
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

All CPUs in a package are represented in an HFI table. There exists an
HFI table per package. Thus, CPUs in a package need to coordinate to
initialize and access the table. Do such coordination during CPU hotplug.
Use the first CPU to come online in a package to initialize the HFI
instance and the data structure representing it. Other CPUs in the same
package need only to register or unregister themselves in that data
structure.

The HFI depends on both the package-level thermal management and the local
APIC thermal local vector. Thus, to ensure that a CPU coming online has an
associated HFI instance when the hardware issues an HFI event, enable the
HFI only after having enabled the local APIC thermal vector. The thermal
throttle driver takes care of the needed package-level initialization.
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The Intel Hardware Feedback Interface provides guidance to the operating
system about the performance and energy efficiency capabilities of each
CPU in the system. Capabilities are numbers between 0 and 255 where a
higher number represents a higher capability. For each CPU, energy
efficiency and performance are reported as separate capabilities.

Hardware computes these capabilities based on the operating conditions of
the system such as power and thermal limits. These capabilities are shared
with the operating system in a table resident in memory. Each package in
the system has its own HFI instance. Every logical CPU in the package is
represented in the table. More than one logical CPUs may be represented in
a single table entry. When the hardware updates the table, it generates a
package-level thermal interrupt.

The size and format of the HFI table depend on the supported features and
can only be determined at runtime. To minimally initialize the HFI, parse
its features and allocate one instance per package of a data structure with
the necessary parameters to read and navigate a local copy (i.e., owned by
the driver) of individual HFI tables.

A subsequent changeset will provide per-CPU initialization and interrupt
handling.
Reviewed-by: Len Brown <len.brown@intel.com>
Co-developed by: Aubrey Li <aubrey.li@linux.intel.com>
Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add the CPUID feature bit and the model-specific registers needed to
identify and configure the Intel Hardware Feedback Interface.
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Start a documentation file to describe the purpose and operation of Intel's
Hardware Feedback Interface. Describe how this interface is used in Linux
to relay performance and energy efficiency updates to userspace.
Reviewed-by: Len Brown <len.brown@intel.com>
Suggested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Pull irq fixes from Borislav Petkov:

 - Drop an unused private data field in the AIC driver

 - Various fixes to the realtek-rtl driver

 - Make the GICv3 ITS driver compile again in !SMP configurations

 - Force reset of the GICv3 ITSs at probe time to avoid issues during kexec

 - Yet another kfree/bitmap_free conversion

 - Various DT updates (Renesas, SiFive)

* tag 'irq_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  dt-bindings: interrupt-controller: sifive,plic: Group interrupt tuples
  dt-bindings: interrupt-controller: sifive,plic: Fix number of interrupts
  dt-bindings: irqchip: renesas-irqc: Add R-Car V3U support
  irqchip/gic-v3-its: Reset each ITS's BASERn register before probe
  irqchip/gic-v3-its: Fix build for !SMP
  irqchip/loongson-pch-ms: Use bitmap_free() to free bitmap
  irqchip/realtek-rtl: Service all pending interrupts
  irqchip/realtek-rtl: Fix off-by-one in routing
  irqchip/realtek-rtl: Map control data to virq
  irqchip/apple-aic: Drop unused ipi_hwirq field

Pull perf fixes from Borislav Petkov:

 - Prevent accesses to the per-CPU cgroup context list from another CPU
   except the one it belongs to, to avoid list corruption

 - Make sure parent events are always woken up to avoid indefinite hangs
   in the traced workload

* tag 'perf_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix cgroup event list management
  perf: Always wake the parent event

Pull scheduler fix from Borislav Petkov:
 "Make sure the membarrier-rseq fence commands are part of the reported
  set when querying membarrier(2) commands through MEMBARRIER_CMD_QUERY"

* tag 'sched_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask

Pull x86 fixes from Borislav Petkov:

 - Add another Intel CPU model to the list of CPUs supporting the
   processor inventory unique number

 - Allow writing to MCE thresholding sysfs files again - a previous
   change had accidentally disabled it and no one noticed. Goes to show
   how much is this stuff used

* tag 'x86_urgent_for_v5.17_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Add Xeon Icelake-D to list of CPUs that support PPIN
  x86/MCE/AMD: Allow thresholding interface updates after init

Merge misc fixes from Andrew Morton:
 "12 patches.

  Subsystems affected by this patch series: sysctl, binfmt, ia64, mm
  (memory-failure, folios, kasan, and psi), selftests, and ocfs2"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2: fix a deadlock when commit trans
  jbd2: export jbd2_journal_[grab|put]_journal_head
  psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
  psi: fix "no previous prototype" warnings when CONFIG_CGROUPS=n
  mm, kasan: use compare-exchange operation to set KASAN page tag
  kasan: test: fix compatibility with FORTIFY_SOURCE
  tools/testing/scatterlist: add missing defines
  mm: page->mapping folio->mapping should have the same offset
  memory-failure: fetch compound_head after pgmap_pfn_valid()
  ia64: make IA64_MCA_RECOVERY bool instead of tristate
  binfmt_misc: fix crash when load/unload module
  include/linux/sysctl.h: fix register_sysctl_mount_point() return type

commit 6f1b2285 introduces a regression which can deadlock as
follows:

  Task1:                              Task2:
  jbd2_journal_commit_transaction     ocfs2_test_bg_bit_allocatable
  spin_lock(&jh->b_state_lock)        jbd_lock_bh_journal_head
  __jbd2_journal_remove_checkpoint    spin_lock(&jh->b_state_lock)
  jbd2_journal_put_journal_head
  jbd_lock_bh_journal_head

Task1 and Task2 lock bh->b_state and jh->b_state_lock in different
order, which finally result in a deadlock.

So use jbd2_journal_[grab|put]_journal_head instead in
ocfs2_test_bg_bit_allocatable() to fix it.

Link: https://lkml.kernel.org/r/20220121071205.100648-3-joseph.qi@linux.alibaba.com
Fixes: 6f1b2285 ("ocfs2: fix race between searching chunks and release journal_head from buffer_head")
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reported-by: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Tested-by: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Reported-by: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Patch series "ocfs2: fix a deadlock case".

This fixes a deadlock case in ocfs2.  We firstly export jbd2 symbols
jbd2_journal_[grab|put]_journal_head as preparation and later use them
in ocfs2 insread of jbd_[lock|unlock]_bh_journal_head to fix the
deadlock.

This patch (of 2):

This exports symbols jbd2_journal_[grab|put]_journal_head, which will be
used outside modules, e.g.  ocfs2.

Link: https://lkml.kernel.org/r/20220121071205.100648-2-joseph.qi@linux.alibaba.comSigned-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Cc: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When CONFIG_PROC_FS is disabled psi code generates the following
warnings:

  kernel/sched/psi.c:1364:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=]
      1364 | static const struct proc_ops psi_cpu_proc_ops = {
           |                              ^~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1355:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=]
      1355 | static const struct proc_ops psi_memory_proc_ops = {
           |                              ^~~~~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1346:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=]
      1346 | static const struct proc_ops psi_io_proc_ops = {
           |                              ^~~~~~~~~~~~~~~

Make definitions of these structures and related functions conditional
on CONFIG_PROC_FS config.

Link: https://lkml.kernel.org/r/20220119223940.787748-3-surenb@google.com
Fixes: 0e94682b ("psi: introduce psi monitor")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When CONFIG_CGROUPS is disabled psi code generates the following
warnings:

  kernel/sched/psi.c:1112:21: warning: no previous prototype for 'psi_trigger_create' [-Wmissing-prototypes]
      1112 | struct psi_trigger *psi_trigger_create(struct psi_group *group,
           |                     ^~~~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1182:6: warning: no previous prototype for 'psi_trigger_destroy' [-Wmissing-prototypes]
      1182 | void psi_trigger_destroy(struct psi_trigger *t)
           |      ^~~~~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1249:10: warning: no previous prototype for 'psi_trigger_poll' [-Wmissing-prototypes]
      1249 | __poll_t psi_trigger_poll(void **trigger_ptr,
           |          ^~~~~~~~~~~~~~~~

Change the declarations of these functions in the header to provide the
prototypes even when they are unused.

Link: https://lkml.kernel.org/r/20220119223940.787748-2-surenb@google.com
Fixes: 0e94682b ("psi: introduce psi monitor")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

It has been reported that the tag setting operation on newly-allocated
pages can cause the page flags to be corrupted when performed
concurrently with other flag updates as a result of the use of
non-atomic operations.

Fix the problem by using a compare-exchange loop to update the tag.

Link: https://lkml.kernel.org/r/20220120020148.1632253-1-pcc@google.com
Link: https://linux-review.googlesource.com/id/I456b24a2b9067d93968d43b4bb3351c0cec63101
Fixes: 2813b9c0 ("kasan, mm, arm64: tag non slab memory allocated via pagealloc")
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

With CONFIG_FORTIFY_SOURCE enabled, string functions will also perform
dynamic checks using __builtin_object_size(ptr), which when failed will
panic the kernel.

Because the KASAN test deliberately performs out-of-bounds operations,
the kernel panics with FORTIFY_SOURCE, for example:

 | kernel BUG at lib/string_helpers.c:910!
 | invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
 | CPU: 1 PID: 137 Comm: kunit_try_catch Tainted: G    B             5.16.0-rc3+ #3
 | Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
 | RIP: 0010:fortify_panic+0x19/0x1b
 | ...
 | Call Trace:
 |  kmalloc_oob_in_memset.cold+0x16/0x16
 |  ...

Fix it by also hiding `ptr` from the optimizer, which will ensure that
__builtin_object_size() does not return a valid size, preventing
fortified string functions from panicking.

Link: https://lkml.kernel.org/r/20220124160744.1244685-1-elver@google.comSigned-off-by: Marco Elver <elver@google.com>
Reported-by: Nico Pache <npache@redhat.com>
Reviewed-by: Nico Pache <npache@redhat.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The cited commits replaced preemptible with pagefault_disabled and
flush_kernel_dcache_page with flush_dcache_page respectively, hence need
to update the corresponding defines in the test.

  scatterlist.c: In function ‘sg_miter_stop’:
  scatterlist.c:919:4: warning: implicit declaration of function ‘flush_dcache_page’ [-Wimplicit-function-declaration]
      flush_dcache_page(miter->page);
      ^~~~~~~~~~~~~~~~~
  In file included from linux/scatterlist.h:8:0,
                   from scatterlist.c:9:
  scatterlist.c:922:18: warning: implicit declaration of function ‘pagefault_disabled’ [-Wimplicit-function-declaration]
      WARN_ON_ONCE(!pagefault_disabled());
                    ^
  linux/mm.h:23:25: note: in definition of macro ‘WARN_ON_ONCE’
    int __ret_warn_on = !!(condition);                      \
                           ^~~~~~~~~

Link: https://lkml.kernel.org/r/20220118082105.1737320-1-maorg@nvidia.com
Fixes: 723aca20 ("mm/scatterlist: replace the !preemptible warning in sg_miter_stop()")
Fixes: 0e84f5db ("scatterlist: replace flush_kernel_dcache_page with flush_dcache_page")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

As with the other members of folio, the offset of page->mapping and
folio->mapping must be the same.  The compile-time check was
inadvertently removed during development.  Add it back.

[willy@infradead.org: changelog redo]

Link: https://lkml.kernel.org/r/20220104011734.21714-1-richard.weiyang@gmail.comSigned-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

memory_failure_dev_pagemap() at the moment assumes base pages (e.g.
dax_lock_page()).  For devmap with compound pages fetch the
compound_head in case a tail page memory failure is being handled.

Currently this is a nop, but in the advent of compound pages in
dev_pagemap it allows memory_failure_dev_pagemap() to keep working.

Without this fix memory-failure handling (i.e.  MCEs on pmem) with
device-dax configured namespaces will regress (and crash).

Link: https://lkml.kernel.org/r/20211202204422.26777-2-joao.m.martins@oracle.comReported-by: Jane Chu <jane.chu@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In linux-next, IA64_MCA_RECOVERY uses the (new) function
make_task_dead(), which is not exported for use by modules.  Instead of
exporting it for one user, convert IA64_MCA_RECOVERY to be a bool
Kconfig symbol.

In a config file from "kernel test robot <lkp@intel.com>" for a
different problem, this linker error was exposed when
CONFIG_IA64_MCA_RECOVERY=m.

Fixes this build error:

  ERROR: modpost: "make_task_dead" [arch/ia64/kernel/mca_recovery.ko] undefined!

Link: https://lkml.kernel.org/r/20220124213129.29306-1-rdunlap@infradead.org
Fixes: 0e25498f ("exit: Add and use make_task_dead.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

We should unregister the table upon module unload otherwise something
horrible will happen when we load binfmt_misc module again.  Also note
that we should keep value returned by register_sysctl_mount_point() and
release it later, otherwise it will leak.

Also, per Christian's comment, to fully restore the old behavior that
won't break userspace the check(binfmt_misc_header) should be
eliminated.

To reproduce:
  modprobe binfmt_misc
  modprobe -r binfmt_misc
  modprobe binfmt_misc
  modprobe -r binfmt_misc
  modprobe binfmt_misc

resulting in

  modprobe: can't load module binfmt_misc (kernel/fs/binfmt_misc.ko): Cannot allocate memory

and an unhappy kernel:

  binfmt_misc: Failed to create fs/binfmt_misc sysctl mount point
  binfmt_misc: Failed to create fs/binfmt_misc sysctl mount point
  BUG: unable to handle page fault for address: fffffbfff8004802
  Call Trace:
    init_misc_binfmt+0x2d/0x1000 [binfmt_misc]

Link: https://lkml.kernel.org/r/20220124181812.1869535-2-ztong0001@gmail.com
Fixes: 3ba442d5 ("fs: move binfmt_misc sysctl to its own file")
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Co-developed-by: Christian Brauner<brauner@kernel.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The CONFIG_SYSCTL=n stub returns the wrong type.

Fixes: ee9efac4 ("sysctl: add helper to register a sysctl mount point")
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'irqchip-fixes-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip fixes from Marc Zyngier:

  - Drop an unused private data field in the AIC driver

  - Various fixes to the realtek-rtl driver

  - Make the GICv3 ITS driver compile again in !SMP configurations

  - Force reset of the GICv3 ITSs at probe time to avoid issues during kexec

  - Yet another kfree/bitmap_free conversion

  - Various DT updates (Renesas, SiFive)

Link: https://lore.kernel.org/r/20220128174217.517041-1-maz@kernel.org

Pull pci fixes from Bjorn Helgaas:

 - Fix compilation warnings in new mt7621 driver (Sergio Paracuellos)

 - Restore the sysfs "rom" file for VGA shadow ROMs, which was broken
   when converting "rom" to be a static attribute (Bjorn Helgaas)

* tag 'pci-v5.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/sysfs: Find shadow ROM before static attribute initialization
  PCI: mt7621: Remove unused function pcie_rmw()
  PCI: mt7621: Drop of_match_ptr() to avoid unused variable

Pull gpio fixes from Bartosz Golaszewski:
 "Two fixes for the gpio-simulator:

   - fix a bug with hogs not being set-up in gpio-sim when user-space
     sets the chip label to an empty string

   - include the gpio-sim documentation in the index"

* tag 'gpio-fixes-for-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: sim: add doc file to index file
  gpio: sim: check the label length when setting up device properties

Pull char/misc driver fixes from Greg KH:
 "Here are two small char/misc driver fixes for 5.17-rc2 that fix some
  reported issues. They are:

   - fix up a merge issue in the at25.c driver that ended up dropping
     some lines in the driver. The removed lines ended being needed, so
     this restores it and the driver works again.

   - counter core fix where the wrong error was being returned, NULL
     should be the correct error for when memory is gone here, like the
     kmalloc() core does.

  Both of these have been in linux-next this week with no reported
  issues"

* tag 'char-misc-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  counter: fix an IS_ERR() vs NULL bug
  eeprom: at25: Restore missing allocation

Pull tty/serial driver fixes from Greg KH:
 "Here are some small bug fixes and reverts for reported problems with
  the tty core and drivers. They include:

   - revert the fifo use for the 8250 console mode. It caused too many
     regressions and problems, and had a bug in it as well. This is
     being reworked and should show up in a later -rc1 release, but it's
     not ready for 5.17

   - rpmsg tty race fix

   - restore the cyclades.h uapi header file. Turns out a compiler test
     suite used it for some unknown reason. Bring it back just for the
     parts that are used by the builder test so they continue to build.
     No functionality is restored as no one actually has this hardware
     anymore, nor is it really tested.

   - stm32 driver fixes

   - n_gsm flow control fixes

   - pl011 driver fix

   - rs485 initialization fix

  All of these have been in linux-next this week with no reported
  problems"

* tag 'tty-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  kbuild: remove include/linux/cyclades.h from header file check
  serial: core: Initialize rs485 RTS polarity already on probe
  serial: pl011: Fix incorrect rs485 RTS polarity on set_mctrl
  serial: stm32: fix software flow control transfer
  serial: stm32: prevent TDR register overwrite when sending x_char
  tty: n_gsm: fix SW flow control encoding/handling
  serial: 8250: of: Fix mapped region size when using reg-offset property
  tty: rpmsg: Fix race condition releasing tty port
  tty: Partially revert the removal of the Cyclades public API
  tty: Add support for Brainboxes UC cards.
  Revert "tty: serial: Use fifo in 8250 console driver"

Pull USB driver fixes from Greg KH:
 "Here are some small USB driver fixes for 5.17-rc2 that resolve a
  number of reported problems. These include:

   - typec driver fixes

   - xhci platform driver fixes for suspending

   - ulpi core fix

   - role.h build fix

   - new device ids

   - syzbot-reported bugfixes

   - gadget driver fixes

   - dwc3 driver fixes

   - other small fixes

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

* tag 'usb-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: cdnsp: Fix segmentation fault in cdns_lost_power function
  usb: dwc2: gadget: don't try to disable ep0 in dwc2_hsotg_suspend
  usb: gadget: at91_udc: fix incorrect print type
  usb: dwc3: xilinx: Fix error handling when getting USB3 PHY
  usb: dwc3: xilinx: Skip resets and USB3 register settings for USB2.0 mode
  usb: xhci-plat: fix crash when suspend if remote wake enable
  usb: common: ulpi: Fix crash in ulpi_match()
  usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS
  ucsi_ccg: Check DEV_INT bit only when starting CCG4
  USB: core: Fix hang in usb_kill_urb by adding memory barriers
  usb-storage: Add unusual-devs entry for VL817 USB-SATA bridge
  usb: typec: tcpm: Do not disconnect when receiving VSAFE0V
  usb: typec: tcpm: Do not disconnect while receiving VBUS off
  usb: typec: Don't try to register component master without components
  usb: typec: Only attempt to link USB ports if there is fwnode
  usb: typec: tcpci: don't touch CC line if it's Vconn source
  usb: roles: fix include/linux/usb/role.h compile issue

Pull block fixes from Jens Axboe:

 - NVMe pull request
      - add the IGNORE_DEV_SUBNQN quirk for Intel P4500/P4600 SSDs (Wu
        Zheng)
      - remove the unneeded ret variable in nvmf_dev_show (Changcheng
        Deng)

 - Fix for a hang regression introduced with a patch in the merge
   window, where low queue depth devices would not always get woken
   correctly (Laibin)

 - Small series fixing an IO accounting issue with bio backed dm devices
   (Mike, Yu)

* tag 'block-5.17-2022-01-28' of git://git.kernel.dk/linux-block:
  dm: properly fix redundant bio-based IO accounting
  dm: revert partial fix for redundant bio-based IO accounting
  block: add bio_start_io_acct_time() to control start_time
  blk-mq: Fix wrong wakeup batch configuration which will cause hang
  nvme-fabrics: remove the unneeded ret variable in nvmf_dev_show
  nvme-pci: add the IGNORE_DEV_SUBNQN quirk for Intel P4500/P4600 SSDs
  blk-mq: fix missing blk_account_io_done() in error path
  block: fix memory leak in disk_register_independent_access_ranges

Pull io_uring fixes from Jens Axboe:
 "Just two small fixes this time:

   - Fix a bug that can lead to node registration taking 1 second, when
     it should finish much quicker (Dylan)

   - Remove an unused argument from a function (Usama)"

* tag 'io_uring-5.17-2022-01-28' of git://git.kernel.dk/linux-block:
  io_uring: remove unused argument from io_rsrc_node_alloc
  io_uring: fix bug in slow unregistering of nodes

Pull powerpc fixes from Michael Ellerman:

 - Fix VM debug warnings on boot triggered via __set_fixmap().

 - Fix a debug warning in the 64-bit Book3S PMU handling code.

 - Fix nested guest HFSCR handling with multiple vCPUs on Power9 or
   later.

 - Fix decrementer storm caused by a recent change, seen with some
   configs.

Thanks to Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy,
Fabiano Rosas, Maxime Bizon, Nicholas Piggin, and Sachin Sant.

* tag 'powerpc-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/interrupt: Fix decrementer storm
  KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs
  powerpc/perf: Fix power_pmu_disable to call clear_pmi_irq_pending only if PMI is pending
  powerpc/fixmap: Fix VM debug warning on unmap

Pull arm64 fixes from Catalin Marinas:

 - Errata workarounds for Cortex-A510: broken hardware dirty bit
   management, detection code for the TRBE (tracing) bugs with the
   actual fixes going in via the CoreSight tree.

 - Cortex-X2 errata handling for TRBE (inheriting the workarounds from
   Cortex-A710).

 - Fix ex_handler_load_unaligned_zeropad() to use the correct struct
   members.

 - A couple of kselftest fixes for FPSIMD.

 - Silence the vdso "no previous prototype" warning.

 - Mark start_backtrace() notrace and NOKPROBE_SYMBOL.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: cpufeature: List early Cortex-A510 parts as having broken dbm
  kselftest/arm64: Correct logging of FPSIMD register read via ptrace
  kselftest/arm64: Skip VL_INHERIT tests for unsupported vector types
  arm64: errata: Add detection for TRBE trace data corruption
  arm64: errata: Add detection for TRBE invalid prohibited states
  arm64: errata: Add detection for TRBE ignored system register writes
  arm64: Add Cortex-A510 CPU part definition
  arm64: extable: fix load_unaligned_zeropad() reg indices
  arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL
  arm64: errata: Update ARM64_ERRATUM_[2119858|2224489] with Cortex-X2 ranges
  arm64: Add Cortex-X2 CPU part definition
  arm64: vdso: Fix "no previous prototype" warning

Merge tag 'fixes-v5.17-lsm-ceph-null' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security sybsystem fix from James Morris:
 "Fix NULL pointer crash in LSM via Ceph, from Vivek Goyal"

* tag 'fixes-v5.17-lsm-ceph-null' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  security, lsm: dentry_init_security() Handle multi LSM registration

Pull documentation fixes from Jonathan Corbet:
 "A few documentation fixes for 5.17"

* tag 'docs-5.17-3' of git://git.lwn.net/linux:
  docs/vm: Fix typo in *harden*
  Documentation: arm: marvell: Extend Avanta list
  docs: fix typo in Documentation/kernel-hacking/locking.rst
  docs: Hook the RTLA documents into the kernel docs build

Record the start_time for a bio but defer the starting block core's IO
accounting until after IO is submitted using bio_start_io_acct_time().

This approach avoids the need to mess around with any of the
individual IO stats in response to a bio_split() that follows bio
submission.
Reported-by: Bud Brown <bubrown@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Depends-on: e45c47d1 ("block: add bio_start_io_acct_time() to control start_time")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220128155841.39644-4-snitzer@redhat.comSigned-off-by: Jens Axboe <axboe@kernel.dk>