* for-next/early-idreg-overrides:
  arm64/kernel: Move 'nokaslr' parsing out of early idreg code
  arm64: idreg-override: Avoid kstrtou64() to parse a single hex digit
  arm64: idreg-override: Avoid sprintf() for simple string concatenation
  arm64: idreg-override: avoid strlen() to check for empty strings
  arm64: idreg-override: Avoid parameq() and parameqn()
  arm64: idreg-override: Prepare for place relative reloc patching
  arm64: idreg-override: Omit non-NULL checks for override pointer

* for-next/cpufeature:
  arm64: Align boot cpucap handling with system cpucap handling
  arm64: Cleanup system cpucap handling
  arm64: Kconfig: drop KAISER reference from KPTI option description
  arm64: mm: Only map KPTI trampoline if it is going to be used
  arm64: Get rid of ARM64_HAS_NO_HW_PREFETCH

Currently the detection+enablement of boot cpucaps is separate from the
patching of boot cpucap alternatives, which means there's a period where
cpus_have_cap($CAP) and alternative_has_cap($CAP) may be mismatched.

It would be preferable to manage the boot cpucaps in the same way as the
system cpucaps, both for clarity and to minimize the risk of accidental
usage of code relying upon an alternative which has not yet been
patched.

This patch aligns the handling of boot cpucaps with the handling of
system cpucaps:

* The existing setup_boot_cpu_capabilities() function is moved to be
  closer to the setup_system_capabilities() and setup_system_features()
  functions so that they're more clearly related and more likely to be
  updated together in future.

* The patching of boot cpucap alternatives is moved into
  setup_boot_cpu_capabilities(), immediately after boot cpucaps are
  detected and enabled.

* A new setup_boot_cpu_features() function is added to mirror
  setup_system_features(); this handles initialization of cpucap data
  structures and calls setup_boot_cpu_capabilities(). This makes
  init_cpu_features() a closer mirror to update_cpu_features(), and
  makes smp_prepare_boot_cpu() a closer mirror to smp_cpus_done().

Importantly, while these changes alter the structure of the code, they
retain the existing order of calls to:

  init_cpu_features(); // prefix initializing feature regs
  init_cpucap_indirect_list();
  detect_system_supports_pseudo_nmi();
  update_cpu_capabilities(SCOPE_BOOT_CPU | SCOPE_LOCAL_CPU);
  enable_cpu_capabilities(SCOPE_BOOT_CPU);
  apply_boot_alternatives();

... and hence there should be no functional change as a result of this
patch; this is purely a structural cleanup.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20231212170910.3745497-3-mark.rutland@arm.comSigned-off-by: Will Deacon <will@kernel.org>

Recent changes to remove cpus_have_const_cap() introduced new users of
cpus_have_cap() in the period between detecting system cpucaps and
patching alternatives. It would be preferable to defer these until after
the relevant cpucaps have been patched so that these can use the usual
feature check helper functions, which is clearer and has less risk of
accidental usage of code relying upon an alternative which has not yet
been patched.

This patch reworks the system-wide cpucap detection and patching to
minimize this transient period:

* The detection, enablement, and patching of system cpucaps is moved
  into a new setup_system_capabilities() function so that these can be
  grouped together more clearly, with no other functions called in the
  period between detection and patching. This is called from
  setup_system_features() before the subsequent checks that depend on
  the cpucaps.

  The logging of TTBR0 PAN and cpucaps with a mask is also moved here to
  keep these as close as possible to update_cpu_capabilities().

  At the same time, comments are corrected and improved to make the
  intent clearer.

* As hyp_mode_check() only tests system register values (not hwcaps) and
  must be called prior to patching, the call to hyp_mode_check() is
  moved before the call to setup_system_features().

* In setup_system_features(), the use of system_uses_ttbr0_pan() is
  restored, now that this occurs after alternatives are patched. This is
  a partial revert of commit:

    53d62e99 ("arm64: Avoid cpus_have_const_cap() for ARM64_HAS_PAN")

* In sve_setup() and sme_setup(), the use of system_supports_sve() and
  system_supports_sme() respectively are restored, now that these occur
  after alternatives are patched. This is a partial revert of commit:

    a76521d1 ("arm64: Avoid cpus_have_const_cap() for ARM64_{SVE,SME,SME2,FA64}")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20231212170910.3745497-2-mark.rutland@arm.comSigned-off-by: Will Deacon <will@kernel.org>

Parsing and ignoring 'nokaslr' can be done from anywhere, except from
the code that runs very early and is therefore built with limitations on
the kind of relocations it is permitted to use.

So move it to a source file that is part of the ordinary kernel build.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-63-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

All ID register value overrides are =0 with the exception of the nokaslr
pseudo feature which uses =1. In order to remove the dependency on
kstrtou64(), which is part of the core kernel and no longer usable once
we move idreg-override into the early mini C runtime, let's just parse a
single hex digit (with optional leading 0x) and set the output value
accordingly.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-62-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

Instead of using sprintf() with the "%s.%s=" format, where the first
string argument is always the same in the inner loop of match_options(),
use simple memcpy() for string concatenation, and move the first copy to
the outer loop. This removes the dependency on sprintf(), which will be
difficult to fulfil when we move this code into the early mini C
runtime.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-61-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

strlen() is a costly way to decide whether a string is empty, as in that
case, the first character will be NUL so we can check for that directly.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-60-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

The only way parameq() and parameqn() deviate from the ordinary string
and memory routines is that they ignore the difference between dashes
and underscores.

Since we copy each command line argument into a buffer before passing it
to parameq() and parameqn() numerous times, let's just convert all
dashes to underscores just once, and update the alias array accordingly.

This also helps reduce the dependency on kernel APIs that are no longer
available once we move this code into the early mini C runtime.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-59-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

The ID reg override handling code uses a rather elaborate data structure
that relies on statically initialized absolute address values in pointer
fields. This means that this code cannot run until relocation fixups
have been applied, and this is unfortunate, because it means we cannot
discover overrides for KASLR or LVA/LPA without creating the kernel
mapping and performing the relocations first.

This can be solved by switching to place-relative relocations, which can
be applied by the linker at build time. This means some additional
arithmetic is required when dereferencing these pointers, as we can no
longer dereference the pointer members directly.

So let's implement this for idreg-override.c in a preliminary way, i.e.,
convert all the references in code to use a special accessor that
produces the correct absolute value at runtime.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-58-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

Now that override pointers are always set, we can drop the various
non-NULL checks that we have in the code.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-57-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

KAISER is a reference to the KASLR hardening technique that already
existed before Meltdown happened, and by now, it is sufficiently obscure
that mentioning it does not actually clarify anything. So remove this
reference, and replace it with KPTI.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20231127120049.2258650-8-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

Avoid creating the fixmap entries for the KPTI trampoline if KPTI is not
in use.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20231127120049.2258650-7-ardb@google.comSigned-off-by: Will Deacon <will@kernel.org>

Back in 2016, it was argued that implementations lacking a HW
prefetcher could be helped by sprinkling a number of PRFM
instructions in strategic locations.

In 2023, the one platform that presumably needed this hack is no
longer in active use (let alone maintained), and an quick
experiment shows dropping this hack only leads to a 0.4% drop
on a full kernel compilation (tested on a MT30-GS0 48 CPU system).

Given that this is pretty much in the noise department and that
it may give odd ideas to other implementers, drop the hack for
good.
Suggested-by: Will Deacon <will@kernel.org>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20231122133754.1240687-1-maz@kernel.orgSigned-off-by: Will Deacon <will@kernel.org>

Pull tracing fixes from Steven Rostedt::
 "Eventfs fixes:

   - With the usage of simple_recursive_remove() recommended by Al Viro,
     the code should not be calling "d_invalidate()" itself. Doing so is
     causing crashes. The code was calling d_invalidate() on the race of
     trying to look up a file while the parent was being deleted. This
     was detected, and the added dentry was having d_invalidate() called
     on it, but the deletion of the directory was also calling
     d_invalidate() on that same dentry.

   - A fix to not free the eventfs_inode (ei) until the last dput() was
     called on its ei->dentry made the ei->dentry exist even after it
     was marked for free by setting the ei->is_freed. But code elsewhere
     still was checking if ei->dentry was NULL if ei->is_freed is set
     and would trigger WARN_ON if that was the case. That's no longer
     true and there should not be any warnings when it is true.

   - Use GFP_NOFS for allocations done under eventfs_mutex. The
     eventfs_mutex can be taken on file system reclaim, make sure that
     allocations done under that mutex do not trigger file system
     reclaim.

   - Clean up code by moving the taking of inode_lock out of the helper
     functions and into where they are needed, and not use the parameter
     to know to take it or not. It must always be held but some callers
     of the helper function have it taken when they were called.

   - Warn if the inode_lock is not held in the helper functions.

   - Warn if eventfs_start_creating() is called without a parent. As
     eventfs is underneath tracefs, all files created will have a parent
     (the top one will have a tracefs parent).

  Tracing update:

   - Add Mathieu Desnoyers as an official reviewer of the tracing subsystem"

* tag 'trace-v6.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  MAINTAINERS: TRACING: Add Mathieu Desnoyers as Reviewer
  eventfs: Make sure that parent->d_inode is locked in creating files/dirs
  eventfs: Do not allow NULL parent to eventfs_start_creating()
  eventfs: Move taking of inode_lock into dcache_dir_open_wrapper()
  eventfs: Use GFP_NOFS for allocation when eventfs_mutex is held
  eventfs: Do not invalidate dentry in create_file/dir_dentry()
  eventfs: Remove expectation that ei->is_freed means ei->dentry == NULL

Pull parisc architecture fixes from Helge Deller:
 "This patchset fixes and enforces correct section alignments for the
  ex_table, altinstructions, parisc_unwind, jump_table and bug_table
  which are created by inline assembly.

  Due to not being correctly aligned at link & load time they can
  trigger unnecessarily the kernel unaligned exception handler at
  runtime. While at it, I switched the bug table to use relative
  addresses which reduces the size of the table by half on 64-bit.

  We still had the ENOSYM and EREMOTERELEASE errno symbols as left-overs
  from HP-UX, which now trigger build-issues with glibc. We can simply
  remove them.

  Most of the patches are tagged for stable kernel series.

  Summary:

   - Drop HP-UX ENOSYM and EREMOTERELEASE return codes to avoid glibc
     build issues

   - Fix section alignments for ex_table, altinstructions, parisc unwind
     table, jump_table and bug_table

   - Reduce size of bug_table on 64-bit kernel by using relative
     pointers"

* tag 'parisc-for-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Reduce size of the bug_table on 64-bit kernel by half
  parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes
  parisc: Use natural CPU alignment for bug_table
  parisc: Ensure 32-bit alignment on parisc unwind section
  parisc: Mark lock_aligned variables 16-byte aligned on SMP
  parisc: Mark jump_table naturally aligned
  parisc: Mark altinstructions read-only and 32-bit aligned
  parisc: Mark ex_table entries 32-bit aligned in uaccess.h
  parisc: Mark ex_table entries 32-bit aligned in assembly.h

Pull x86 microcode fixes from Ingo Molnar:
 "Fix/enhance x86 microcode version reporting: fix the bootup log spam,
  and remove the driver version announcement to avoid version confusion
  when distros backport fixes"

* tag 'x86-urgent-2023-11-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode: Rework early revisions reporting
  x86/microcode: Remove the driver announcement and version

Pull x86 perf event fix from Ingo Molnar:
 "Fix a bug in the Intel hybrid CPUs hardware-capabilities enumeration
  code resulting in non-working events on those platforms"

* tag 'perf-urgent-2023-11-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Correct incorrect 'or' operation for PMU capabilities

Pull locking fix from Ingo Molnar:
 "Fix lockdep block chain corruption resulting in KASAN warnings"

* tag 'locking-urgent-2023-11-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lockdep: Fix block chain corruption

Pull smb client fixes from Steve French:

 - use after free fix in releasing multichannel interfaces

 - fixes for special file types (report char, block, FIFOs properly when
   created e.g. by NFS to Windows)

 - fixes for reporting various special file types and symlinks properly
   when using SMB1

* tag '6.7-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  smb: client: introduce cifs_sfu_make_node()
  smb: client: set correct file type from NFS reparse points
  smb: client: introduce ->parse_reparse_point()
  smb: client: implement ->query_reparse_point() for SMB1
  cifs: fix use after free for iface while disabling secondary channels

Pull USB / PHY / Thunderbolt fixes from Greg KH:
 "Here are a number of reverts, fixes, and new device ids for 6.7-rc3
  for the USB, PHY, and Thunderbolt driver subsystems. Include in here
  are:

   - reverts of some PHY drivers that went into 6.7-rc1 that shouldn't
     have been merged yet, the author is reworking them based on review
     comments as they were using older apis that shouldn't be used
     anymore for newer drivers

   - small thunderbolt driver fixes for reported issues

   - USB driver fixes for a variety of small issues in dwc3, typec,
     xhci, and other smaller drivers.

   - new device ids for usb-serial and onboard_usb_hub drivers.

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

* tag 'usb-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits)
  USB: serial: option: add Luat Air72*U series products
  USB: dwc3: qcom: fix ACPI platform device leak
  USB: dwc3: qcom: fix software node leak on probe errors
  USB: dwc3: qcom: fix resource leaks on probe deferral
  USB: dwc3: qcom: simplify wakeup interrupt setup
  USB: dwc3: qcom: fix wakeup after probe deferral
  dt-bindings: usb: qcom,dwc3: fix example wakeup interrupt types
  usb: misc: onboard-hub: add support for Microchip USB5744
  dt-bindings: usb: microchip,usb5744: Add second supply
  usb: misc: ljca: Fix enumeration error on Dell Latitude 9420
  USB: serial: option: add Fibocom L7xx modules
  USB: xhci-plat: fix legacy PHY double init
  usb: typec: tipd: Supply also I2C driver data
  usb: xhci-mtk: fix in-ep's start-split check failure
  usb: dwc3: set the dma max_seg_size
  usb: config: fix iteration issue in 'usb_get_bos_descriptor()'
  usb: dwc3: add missing of_node_put and platform_device_put
  USB: dwc2: write HCINT with INTMASK applied
  usb: misc: ljca: Drop _ADR support to get ljca children devices
  usb: cdnsp: Fix deadlock issue during using NCM gadget
  ...

Pull xfs fix from Chandan Babu:

 - Validate quota records recovered from the log before writing them to
   the disk.

* tag 'xfs-6.7-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: dquot recovery does not validate the recovered dquot
  xfs: clean up dqblk extraction

Pull arm64 fixes from Catalin Marinas:

 - Fix "rodata=on" not disabling "rodata=full" on arm64

 - Add arm64 make dependency between vmlinuz.efi and Image, leading to
   occasional build failures previously (with parallel building)

 - Add newline to the output formatting of the za-fork kselftest

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: add dependency between vmlinuz.efi and Image
  kselftest/arm64: Fix output formatting for za-fork
  arm64: mm: Fix "rodata=on" when CONFIG_RODATA_FULL_DEFAULT_ENABLED=y

Pull xen fixes from Juergen Gross:

 - A small cleanup patch for the Xen privcmd driver

 - A fix for the swiotlb-xen driver which was missing the advertising of
   the maximum mapping length

 - A fix for Xen on Arm for a longstanding bug, which happened to occur
   only recently: a structure in percpu memory crossed a page boundary,
   which was rejected by the hypervisor

* tag 'for-linus-6.7a-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  arm/xen: fix xen_vcpu_info allocation alignment
  xen: privcmd: Replace zero-length array with flex-array member and use __counted_by
  swiotlb-xen: provide the "max_mapping_size" method

Enable GENERIC_BUG_RELATIVE_POINTERS which will store 32-bit relative
offsets to the bug address and the source file name instead of 64-bit
absolute addresses. This effectively reduces the size of the
bug_table[] array by half on 64-bit kernels.
Signed-off-by: Helge Deller <deller@gmx.de>

Those return codes are only defined for the parisc architecture and
are leftovers from when we wanted to be HP-UX compatible.

They are not returned by any Linux kernel syscall but do trigger
problems with the glibc strerrorname_np() and strerror() functions as
reported in glibc issue #31080.

There is no need to keep them, so simply remove them.
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: Bruno Haible <bruno@clisp.org>
Closes: https://sourceware.org/bugzilla/show_bug.cgi?id=31080
Cc: stable@vger.kernel.org

Make sure that the __bug_table section gets 32- or 64-bit aligned,
depending if a 32- or 64-bit kernel is being built.
Mark it non-writeable and use .blockz instead of the .org assembler
directive to pad the struct.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

Make sure the .PARISC.unwind section will be 32-bit aligned.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

On parisc we need 16-byte alignment for variables which are used for
locking. Mark the __lock_aligned attribute acordingly so that the
.data..lock_aligned section will get that alignment in the generated
object files.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

The jump_table stores two 32-bit words and one 32- (on 32-bit kernel)
or one 64-bit word (on 64-bit kernel).
Ensure that the last word is always 64-bit aligned on a 64-bit kernel
by aligning the whole structure on sizeof(long).
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

Add an align statement to tell the linker that all ex_table entries and as
such the whole ex_table section should be 32-bit aligned in vmlinux and modules.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

Add an align statement to tell the linker that all ex_table entries and as
such the whole ex_table section should be 32-bit aligned in vmlinux and modules.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+

Pull s390 updates from Alexander Gordeev:

 - Remove unnecessary assignment of the performance event last_tag.

 - Create missing /sys/firmware/ipl/* attributes when kernel is booted
   in dump mode using List-directed ECKD IPL.

 - Remove odd comment.

 - Fix s390-specific part of scripts/checkstack.pl script that only
   matches three-digit numbers starting with 3 or any higher number and
   skips any stack sizes smaller than 304 bytes.

* tag 's390-6.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  scripts/checkstack.pl: match all stack sizes for s390
  s390: remove odd comment
  s390/ipl: add missing IPL_TYPE_ECKD_DUMP case to ipl_init()
  s390/pai: cleanup event initialization

Pull ACPI fixes from Rafael Wysocki:
 "These add an ACPI IRQ override quirk for ASUS ExpertBook B1402CVA and
  fix an ACPI processor idle issue leading to triple-faults in Xen HVM
  guests and an ACPI backlight driver issue that causes GPUs to
  misbehave while their children power is being fixed up.

  Specifics:

   - Avoid powering up GPUs while attempting to fix up power for their
     children (Hans de Goede)

   - Use raw_safe_halt() instead of safe_halt() in acpi_idle_play_dead()
     so as to avoid triple-falts during CPU online in Xen HVM guests due
     to the setting of the hardirqs_enabled flag in safe_halt() (David
     Woodhouse)

   - Add an ACPI IRQ override quirk for ASUS ExpertBook B1402CVA (Hans
     de Goede)"

* tag 'acpi-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: resource: Skip IRQ override on ASUS ExpertBook B1402CVA
  ACPI: video: Use acpi_device_fix_up_power_children()
  ACPI: PM: Add acpi_device_fix_up_power_children() function
  ACPI: processor_idle: use raw_safe_halt() in acpi_idle_play_dead()

Pull power management fix from Rafael Wysocki:
 "Fix a syntax error in the sleepgraph utility which causes it to exit
  early on every invocation (David Woodhouse)"

* tag 'pm-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: tools: Fix sleepgraph syntax error

Pull AFS fixes from David Howells:

 - Fix the afs_server_list struct to be cleaned up with RCU

 - Fix afs to translate a no-data result from a DNS lookup into ENOENT,
   not EDESTADDRREQ for consistency with OpenAFS

 - Fix afs to translate a negative DNS lookup result into ENOENT rather
   than EDESTADDRREQ

 - Fix file locking on R/O volumes to operate in local mode as the
   server doesn't handle exclusive locks on such files

 - Set SB_RDONLY on superblocks for RO and Backup volumes so that the
   VFS can see that they're read only

* tag 'afs-fixes-20231124' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Mark a superblock for an R/O or Backup volume as SB_RDONLY
  afs: Fix file locking on R/O volumes to operate in local mode
  afs: Return ENOENT if no cell DNS record can be found
  afs: Make error on cell lookup failure consistent with OpenAFS
  afs: Fix afs_server_list to be cleaned up with RCU

Merge ACPI backlight driver fixes and an ACPI processor driver fix for
6.7-rc3:

 - Avoid powering up GPUs while attempting to fix up power for their
   children (Hans de Goede).

 - Use raw_safe_halt() instead of safe_halt() in acpi_idle_play_dead()
   so as to avoid triple-falts during CPU online in Xen HVM guests due
   to the setting of the hardirqs_enabled flag in safe_halt() (David
   Woodhouse).

* acpi-video:
  ACPI: video: Use acpi_device_fix_up_power_children()
  ACPI: PM: Add acpi_device_fix_up_power_children() function

* acpi-processor:
  ACPI: processor_idle: use raw_safe_halt() in acpi_idle_play_dead()

Pull vfs fixes from Christian Brauner:

 - Avoid calling back into LSMs from vfs_getattr_nosec() calls.

   IMA used to query inode properties accessing raw inode fields without
   dedicated helpers. That was finally fixed a few releases ago by
   forcing IMA to use vfs_getattr_nosec() helpers.

   The goal of the vfs_getattr_nosec() helper is to query for attributes
   without calling into the LSM layer which would be quite problematic
   because incredibly IMA is called from __fput()...

     __fput()
       -> ima_file_free()

   What it does is to call back into the filesystem to update the file's
   IMA xattr. Querying the inode without using vfs_getattr_nosec() meant
   that IMA didn't handle stacking filesystems such as overlayfs
   correctly. So the switch to vfs_getattr_nosec() is quite correct. But
   the switch to vfs_getattr_nosec() revealed another bug when used on
   stacking filesystems:

     __fput()
       -> ima_file_free()
          -> vfs_getattr_nosec()
             -> i_op->getattr::ovl_getattr()
                -> vfs_getattr()
                   -> i_op->getattr::$WHATEVER_UNDERLYING_FS_getattr()
                      -> security_inode_getattr() # calls back into LSMs

   Now, if that __fput() happens from task_work_run() of an exiting task
   current->fs and various other pointer could already be NULL. So
   anything in the LSM layer relying on that not being NULL would be
   quite surprised.

   Fix that by passing the information that this is a security request
   through to the stacking filesystem by adding a new internal
   ATT_GETATTR_NOSEC flag. Now the callchain becomes:

     __fput()
       -> ima_file_free()
          -> vfs_getattr_nosec()
             -> i_op->getattr::ovl_getattr()
                -> if (AT_GETATTR_NOSEC)
                          vfs_getattr_nosec()
                   else
                          vfs_getattr()
                   -> i_op->getattr::$WHATEVER_UNDERLYING_FS_getattr()

 - Fix a bug introduced with the iov_iter rework from last cycle.

   This broke /proc/kcore by copying too much and without the correct
   offset.

 - Add a missing NULL check when allocating the root inode in
   autofs_fill_super().

 - Fix stable writes for multi-device filesystems (xfs, btrfs etc) and
   the block device pseudo filesystem.

   Stable writes used to be a superblock flag only, making it a per
   filesystem property. Add an additional AS_STABLE_WRITES mapping flag
   to allow for fine-grained control.

 - Ensure that offset_iterate_dir() returns 0 after reaching the end of
   a directory so it adheres to getdents() convention.

* tag 'vfs-6.7-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  libfs: getdents() should return 0 after reaching EOD
  xfs: respect the stable writes flag on the RT device
  xfs: clean up FS_XFLAG_REALTIME handling in xfs_ioctl_setattr_xflags
  block: update the stable_writes flag in bdev_add
  filemap: add a per-mapping stable writes flag
  autofs: add: new_inode check in autofs_fill_super()
  iov_iter: fix copy_page_to_iter_nofault()
  fs: Pass AT_GETATTR_NOSEC flag to getattr interface function