[ Upstream commit 646faf36d7271c597497ca547a59912fcab49be9 ]

/proc/cgroups lists only v1 controllers by default, however, this is
only enforced since the commit af000ce85293b ("cgroup: Do not report
unavailable v1 controllers in /proc/cgroups") and there is software in
the wild that uses content of /proc/cgroups to decide on availability of
v2 (sic) controllers.

Add a boottime param that can bring back the previous behavior for
setups where the check in the software cannot be changed and it causes
e.g. unintended OOMs.

Also, this patch takes out cgrp_v1_visible from cgroup1_subsys_absent()
guard since it's only important to check which hierarchy (v1 vs v2) the
subsys is attached to. This has no effect on the printed message but
the code is cleaner since cgrp_v1_visible is really about mounted
hierarchies, not the content of /proc/cgroups.

Link: https://lore.kernel.org/r/b26b60b7d0d2a5ecfd2f3c45f95f32922ed24686.camel@decadent.org.uk
Fixes: af000ce85293b ("cgroup: Do not report unavailable v1 controllers in /proc/cgroups")
Fixes: a0ab1453226d8 ("cgroup: Print message when /proc/cgroups is read on v2-only system")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Pull misc fixes from Andrew Morton:
 "19 hotfixes. A whopping 16 are cc:stable and the remainder address
  post-6.15 issues or aren't considered necessary for -stable kernels.

  14 are for MM.  Three gdb-script fixes and a kallsyms build fix"

* tag 'mm-hotfixes-stable-2025-07-11-16-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  Revert "sched/numa: add statistics of numa balance task"
  mm: fix the inaccurate memory statistics issue for users
  mm/damon: fix divide by zero in damon_get_intervals_score()
  samples/damon: fix damon sample mtier for start failure
  samples/damon: fix damon sample wsse for start failure
  samples/damon: fix damon sample prcl for start failure
  kasan: remove kasan_find_vm_area() to prevent possible deadlock
  scripts: gdb: vfs: support external dentry names
  mm/migrate: fix do_pages_stat in compat mode
  mm/damon/core: handle damon_call_control as normal under kdmond deactivation
  mm/rmap: fix potential out-of-bounds page table access during batched unmap
  mm/hugetlb: don't crash when allocating a folio if there are no resv
  scripts/gdb: de-reference per-CPU MCE interrupts
  scripts/gdb: fix interrupts.py after maple tree conversion
  maple_tree: fix mt_destroy_walk() on root leaf node
  mm/vmalloc: leave lazy MMU mode on PTE mapping error
  scripts/gdb: fix interrupts display after MCP on x86
  lib/alloc_tag: do not acquire non-existent lock in alloc_tag_top_users()
  kallsyms: fix build without execinfo

This reverts commit ad6b26b6a0a79166b53209df2ca1cf8636296382.

This commit introduces per-memcg/task NUMA balance statistics, but
unfortunately it introduced a NULL pointer exception due to the following
race condition: After a swap task candidate was chosen, its mm_struct
pointer was set to NULL due to task exit.  Later, when performing the
actual task swapping, the p->mm caused the problem.

CPU0                                   CPU1
:
...
task_numa_migrate
     task_numa_find_cpu
      task_numa_compare
        # a normal task p is chosen
        env->best_task = p

                                          # p exit:
                                          exit_signals(p);
                                             p->flags |= PF_EXITING
                                          exit_mm
                                             p->mm = NULL;

      migrate_swap_stop
        __migrate_swap_task((arg->src_task, arg->dst_cpu)
         count_memcg_event_mm(p->mm, NUMA_TASK_SWAP)# p->mm is NULL

task_lock() should be held and the PF_EXITING flag needs to be checked to
prevent this from happening.  After discussion, the conclusion was that
adding a lock is not worthwhile for some statistics calculations.  Revert
the change and rely on the tracepoint for this purpose.

Link: https://lkml.kernel.org/r/20250704135620.685752-1-yu.c.chen@intel.com
Link: https://lkml.kernel.org/r/20250708064917.BBD13C4CEED@smtp.kernel.org
Fixes: ad6b26b6a0a7 ("sched/numa: add statistics of numa balance task")
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Reported-by: Jirka Hladky <jhladky@redhat.com>
Closes: https://lore.kernel.org/all/CAE4VaGBLJxpd=NeRJXpSCuw=REhC5LWJpC29kDy-Zh2ZDyzQZA@mail.gmail.com/
Reported-by: Srikanth Aithal <Srikanth.Aithal@amd.com>
Reported-by: Suneeth D <Suneeth.D@amd.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Hladky <jhladky@redhat.com>
Cc: Libo Chen <libo.chen@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Add the required features detection glue to bugs.c et all in order to
support the TSA mitigation.

Co-developed-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

It will be used by other x86 mitigations.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

If SMB 3.1.1 POSIX Extensions are available and negotiated, the client
should be able to use all characters and not remap anything. Currently, the
user has to explicitly request this behavior by specifying the "nomapposix"
mount option.

Link: https://lore.kernel.org/4195bb677b33d680e77549890a4f4dd3b474ceaf.camel@rx2.rx-server.de
Signed-off-by: Philipp Kerling <pkerling@casix.org>
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Pull USB / Thunderbolt updates from Greg KH:
 "Here is the big set of USB and Thunderbolt changes for 6.16-rc1.
  Included in here are the following:

   - USB offload support for audio devices.

     I think this takes the record for the most number of patch series
     (30+) over the longest period of time (2+ years) to get merged
     properly.

     Many props go to Wesley Cheng for seeing this effort through, they
     took a major out-of-tree hacked-up-monstrosity that was created by
     multiple vendors for their specific devices, got it all merged into
     a semi-coherent set of changes, and got all of the different major
     subsystems to agree on how this should be implemented both with
     changes to their code as well as userspace apis, AND wrangled the
     hardware companies into agreeing to go forward with this, despite
     making them all redo work they had already done in their private
     device trees.

     This feature offers major power savings on embedded devices where a
     USB audio stream can continue to flow while the rest of the system
     is sleeping, something that devices running on battery power really
     care about. There are still some more small tweaks left to be done
     here, and those patches are still out for review and arguing among
     the different hardware companies, but this is a major step forward
     and a great example of how to do upstream development well.

   - small number of thunderbolt fixes and updates, things seem to be
     slowing down here (famous last words...)

   - xhci refactors and reworking to try to handle some rough corner
     cases in some hardware implementations where things don't always
     work properly

   - typec driver updates

   - USB3 power management reworking and updates

   - Removal of some old and orphaned UDC gadget drivers that had not
     been used in a very long time, dropping over 11 thousand lines from
     the tree, always a nice thing, making up for the 12k lines added
     for the USB offload feature.

   - lots of little updates and fixes in different drivers

  All of these have been in linux-next for over 2 weeks, the USB offload
  logic has been in there for 8 weeks now, with no reported issues"

* tag 'usb-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (172 commits)
  ALSA: usb-audio: qcom: fix USB_XHCI dependency
  ASoC: qdsp6: fix compile-testing without CONFIG_OF
  usb: misc: onboard_usb_dev: fix build warning for CONFIG_USB_ONBOARD_DEV_USB5744=n
  usb: typec: tipd: fix typo in TPS_STATUS_HIGH_VOLAGE_WARNING macro
  USB: typec: fix const issue in typec_match()
  USB: gadget: udc: fix const issue in gadget_match_driver()
  USB: gadget: fix up const issue with struct usb_function_instance
  USB: serial: pl2303: add new chip PL2303GC-Q20 and PL2303GT-2AB
  USB: serial: bus: fix const issue in usb_serial_device_match()
  usb: usbtmc: Fix timeout value in get_stb
  usb: usbtmc: Fix read_stb function and get_stb ioctl
  ALSA: qc_audio_offload: try to reduce address space confusion
  ALSA: qc_audio_offload: avoid leaking xfer_buf allocation
  ALSA: qc_audio_offload: rename dma/iova/va/cpu/phys variables
  ALSA: usb-audio: qcom: Fix an error handling path in qc_usb_audio_probe()
  usb: misc: onboard_usb_dev: Fix usb5744 initialization sequence
  dt-bindings: usb: ti,usb8041: Add binding for TI USB8044 hub controller
  usb: misc: onboard_usb_dev: Add support for TI TUSB8044 hub
  usb: gadget: lpc32xx_udc: Use USB API functions rather than constants
  usb: gadget: epautoconf: Use USB API functions rather than constants
  ...

Pull arm64 fixes from Will Deacon:
 "We've got a couple of build fixes when using LLD, a missing TLB
  invalidation and a workaround for broken firmware on SoCs with CPUs
  that implement MPAM:

   - Disable problematic linker assertions for broken versions of LLD

   - Work around sporadic link failure with LLD and various randconfig
     builds

   - Fix missing invalidation in the TLB batching code when reclaim
     races with mprotect() and friends

   - Add a command-line override for MPAM to allow booting on systems
     with broken firmware"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Add override for MPAM
  arm64/mm: Close theoretical race where stale TLB entry remains valid
  arm64: Work around convergence issue with LLD linker
  arm64: Disable LLD linker ASSERT()s for the time being

Pull more MM updates from Andrew Morton:

 - "zram: support algorithm-specific parameters" from Sergey Senozhatsky
   adds infrastructure for passing algorithm-specific parameters into
   zram. A single parameter `winbits' is implemented at this time.

 - "memcg: nmi-safe kmem charging" from Shakeel Butt makes memcg
   charging nmi-safe, which is required by BFP, which can operate in NMI
   context.

 - "Some random fixes and cleanup to shmem" from Kemeng Shi implements
   small fixes and cleanups in the shmem code.

 - "Skip mm selftests instead when kernel features are not present" from
   Zi Yan fixes some issues in the MM selftest code.

 - "mm/damon: build-enable essential DAMON components by default" from
   SeongJae Park reworks DAMON Kconfig to make it easier to enable
   CONFIG_DAMON.

 - "sched/numa: add statistics of numa balance task migration" from Libo
   Chen adds more info into sysfs and procfs files to improve visibility
   into the NUMA balancer's task migration activity.

 - "selftests/mm: cow and gup_longterm cleanups" from Mark Brown
   provides various updates to some of the MM selftests to make them
   play better with the overall containing framework.

* tag 'mm-stable-2025-06-01-14-06' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (43 commits)
  mm/khugepaged: clean up refcount check using folio_expected_ref_count()
  selftests/mm: fix test result reporting in gup_longterm
  selftests/mm: report unique test names for each cow test
  selftests/mm: add helper for logging test start and results
  selftests/mm: use standard ksft_finished() in cow and gup_longterm
  selftests/damon/_damon_sysfs: skip testcases if CONFIG_DAMON_SYSFS is disabled
  sched/numa: add statistics of numa balance task
  sched/numa: fix task swap by skipping kernel threads
  tools/testing: check correct variable in open_procmap()
  tools/testing/vma: add missing function stub
  mm/gup: update comment explaining why gup_fast() disables IRQs
  selftests/mm: two fixes for the pfnmap test
  mm/khugepaged: fix race with folio split/free using temporary reference
  mm: add CONFIG_PAGE_BLOCK_ORDER to select page block order
  mmu_notifiers: remove leftover stub macros
  selftests/mm: deduplicate test names in madv_populate
  kcov: rust: add flags for KCOV with Rust
  mm: rust: make CONFIG_MMU ifdefs more narrow
  mmu_gather: move tlb flush for VM_PFNMAP/VM_MIXEDMAP vmas into free_pgtables()
  mm/damon/Kconfig: enable CONFIG_DAMON by default
  ...

As the message of the commit 09e6b306f3ba ("arm64: cpufeature: discover
CPU support for MPAM") already states, if a buggy firmware fails to
either enable MPAM or emulate the trap as if it were disabled, the
kernel will just fail to boot.  While upgrading the firmware should be
the best solution, we have some hardware of which the vendor have made
no response 2 months after we requested a firmware update.  Allow
overriding it so our devices don't become some e-waste.

Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Cc: Mingcong Bai <jeffbai@aosc.io>
Cc: Shaopeng Tan <tan.shaopeng@fujitsu.com>
Cc: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250602043723.216338-1-xry111@xry111.site
Signed-off-by: Will Deacon <will@kernel.org>