Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux...

Pull non-MM updates from Andrew Morton:

 - "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko)
   fixes a build issue and does some cleanup in ib/sys_info.c

 - "Implement mul_u64_u64_div_u64_roundup()" (David Laight)
   enhances the 64-bit math code on behalf of a PWM driver and beefs up
   the test module for these library functions

 - "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich)
   makes BPF symbol names, sizes, and line numbers available to the GDB
   debugger

 - "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang)
   adds a sysctl which can be used to cause additional info dumping when
   the hung-task and lockup detectors fire

 - "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu)
   adds a general base64 encoder/decoder to lib/ and migrates several
   users away from their private implementations

 - "rbree: inline rb_first() and rb_last()" (Eric Dumazet)
   makes TCP a little faster

 - "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin)
   reworks the KEXEC Handover interfaces in preparation for Live Update
   Orchestrator (LUO), and possibly for other future clients

 - "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin)
   increases the flexibility of KEXEC Handover. Also preparation for LUO

 - "Live Update Orchestrator" (Pasha Tatashin)
   is a major new feature targeted at cloud environments. Quoting the
   cover letter:

      This series introduces the Live Update Orchestrator, a kernel
      subsystem designed to facilitate live kernel updates using a
      kexec-based reboot. This capability is critical for cloud
      environments, allowing hypervisors to be updated with minimal
      downtime for running virtual machines. LUO achieves this by
      preserving the state of selected resources, such as memory,
      devices and their dependencies, across the kernel transition.

      As a key feature, this series includes support for preserving
      memfd file descriptors, which allows critical in-memory data, such
      as guest RAM or any other large memory region, to be maintained in
      RAM across the kexec reboot.

   Mike Rappaport merits a mention here, for his extensive review and
   testing work.

 - "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain)
   moves the kexec and kdump sysfs entries from /sys/kernel/ to
   /sys/kernel/kexec/ and adds back-compatibility symlinks which can
   hopefully be removed one day

 - "kho: fixes for vmalloc restoration" (Mike Rapoport)
   fixes a BUG which was being hit during KHO restoration of vmalloc()
   regions

* tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits)
  calibrate: update header inclusion
  Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()"
  vmcoreinfo: track and log recoverable hardware errors
  kho: fix restoring of contiguous ranges of order-0 pages
  kho: kho_restore_vmalloc: fix initialization of pages array
  MAINTAINERS: TPM DEVICE DRIVER: update the W-tag
  init: replace simple_strtoul with kstrtoul to improve lpj_setup
  KHO: fix boot failure due to kmemleak access to non-PRESENT pages
  Documentation/ABI: new kexec and kdump sysfs interface
  Documentation/ABI: mark old kexec sysfs deprecated
  kexec: move sysfs entries to /sys/kernel/kexec
  test_kho: always print restore status
  kho: free chunks using free_page() instead of kfree()
  selftests/liveupdate: add kexec test for multiple and empty sessions
  selftests/liveupdate: add simple kexec-based selftest for LUO
  selftests/liveupdate: add userspace API selftests
  docs: add documentation for memfd preservation via LUO
  mm: memfd_luo: allow preserving memfd
  liveupdate: luo_file: add private argument to store runtime state
  mm: shmem: export some functions to internal.h
  ...

diff --cc .mailmap
Simple merge

diff --cc Documentation/admin-guide/kernel-parameters.txt
Simple merge

diff --cc Documentation/dev-tools/checkpatch.rst
Simple merge

diff --cc Documentation/driver-api/index.rst
Simple merge

diff --cc MAINTAINERS
index 78b32a60849a9ad5695908c9bad136312085c84a,656e29624d4fd99e8de6169f3f39e2a7a69cd6b2..9a3657a4000070f765d0509b6ac551db1ae4dba1
--- 1/MAINTAINERS
--- 2/MAINTAINERS
+++ b/MAINTAINERS
@@@ -14564,9 -14464,24 +14566,25 @@@ F: include/linux/livepatch*.
  F:    kernel/livepatch/
  F:    kernel/module/livepatch.c
  F:    samples/livepatch/
 +F:    scripts/livepatch/
  F:    tools/testing/selftests/livepatch/
  
+ LIVE UPDATE
+ M:    Pasha Tatashin <pasha.tatashin@soleen.com>
+ M:    Mike Rapoport <rppt@kernel.org>
+ R:    Pratyush Yadav <pratyush@kernel.org>
+ L:    linux-kernel@vger.kernel.org
+ S:    Maintained
+ F:    Documentation/core-api/liveupdate.rst
+ F:    Documentation/mm/memfd_preservation.rst
+ F:    Documentation/userspace-api/liveupdate.rst
+ F:    include/linux/liveupdate.h
+ F:    include/linux/liveupdate/
+ F:    include/uapi/linux/liveupdate.h
+ F:    kernel/liveupdate/
+ F:    mm/memfd_luo.c
+ F:    tools/testing/selftests/liveupdate/
+ 
  LLC (802.2)
  L:    netdev@vger.kernel.org
  S:    Odd fixes
@@@ -15668,10 -15572,8 +15686,10 @@@ F: include/media/imx.
  MEDIA DRIVERS FOR FREESCALE IMX7/8
  M:    Rui Miguel Silva <rmfrfs@gmail.com>
  M:    Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- M:    Martin Kepplinger <martin.kepplinger@puri.sm>
+ M:    Martin Kepplinger-Novakovic <martink@posteo.de>
  R:    Purism Kernel Team <kernel@puri.sm>
 +R:    Frank Li <Frank.Li@nxp.com>
 +L:    imx@lists.linux.dev
  L:    linux-media@vger.kernel.org
  S:    Maintained
  T:    git git://linuxtv.org/media.git

diff --cc arch/x86/kernel/cpu/mce/core.c
Simple merge

diff --cc drivers/acpi/apei/ghes.c
Simple merge

diff --cc fs/ceph/crypto.c
Simple merge

diff --cc fs/ceph/dir.c
Simple merge

diff --cc fs/ceph/inode.c
Simple merge

diff --cc fs/ocfs2/inode.c
Simple merge

diff --cc include/linux/compiler.h
Simple merge

diff --cc include/linux/shmem_fs.h
Simple merge

diff --cc include/linux/uaccess.h
Simple merge

diff --cc init/Kconfig
Simple merge

diff --cc ipc/namespace.c
Simple merge

diff --cc kernel/exit.c
index 4dc1918db67b40334f13197b1a68c82026eb7f33,f041f0c05ebbf6dad0a9edaaf1bb9654deb2cd60..8a87021211ae721ae662e4eac65efbf8818c3780
--- 1/kernel/exit.c
--- 2/kernel/exit.c
+++ b/kernel/exit.c
@@@ -251,13 -251,11 +251,11 @@@ repeat
        memset(&post, 0, sizeof(post));
  
        /* don't need to get the RCU readlock here - the process is dead and
-        * can't be modifying its own credentials. But shut RCU-lockdep up */
-       rcu_read_lock();
+        * can't be modifying its own credentials. */
        dec_rlimit_ucounts(task_ucounts(p), UCOUNT_RLIMIT_NPROC, 1);
-       rcu_read_unlock();
  
        pidfs_exit(p);
 -      cgroup_release(p);
 +      cgroup_task_release(p);
  
        /* Retrieve @thread_pid before __unhash_process() may set it to NULL. */
        thread_pid = task_pid(p);

diff --cc kernel/fork.c
Simple merge

diff --cc kernel/module/main.c
Simple merge

diff --cc kernel/panic.c
Simple merge

diff --cc kernel/watchdog.c
Simple merge

diff --cc lib/Kconfig.debug
Simple merge

diff --cc mm/Makefile
Simple merge

diff --cc mm/internal.h
Simple merge

diff --cc mm/memblock.c
Simple merge

diff --cc mm/shmem.c
Simple merge

diff --cc tools/testing/selftests/alsa/conf.c
Simple merge

diff --cc tools/testing/selftests/arm64/fp/fp-ptrace.c
Simple merge

diff --cc tools/testing/selftests/arm64/fp/sve-ptrace.c
Simple merge

diff --cc tools/testing/selftests/bpf/xskxceiver.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_core.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_cpu.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_cpuset.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_freezer.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_kill.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_kmem.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_memcontrol.c
Simple merge

diff --cc tools/testing/selftests/cgroup/test_zswap.c
Simple merge

diff --cc tools/testing/selftests/coredump/stackdump_test.c
Simple merge

diff --cc tools/testing/selftests/drivers/net/gro.c
index 995b492f5bcb006510984b02e10256b4e9967c08,76aa75469a8c0a757d900c153051a0e9ab873886..e894037d2e3ea9469d65dfc67caae8d57ceae959
--- 1/tools/testing/selftests/drivers/net/gro.c
--- 2/tools/testing/selftests/net/gro.c
+++ b/tools/testing/selftests/drivers/net/gro.c
@@@ -57,8 -57,7 +57,8 @@@
  #include <string.h>
  #include <unistd.h>
  
- #include "../../kselftest.h"
+ #include "kselftest.h"
 +#include "../../net/lib/ksft.h"
  
  #define DPORT 8000
  #define SPORT 1500

diff --cc tools/testing/selftests/drivers/net/hw/toeplitz.c
index a4d04438c3133710d415cc259fa0818e1298e4a3,4b58152d5a491e20e7c8af3366c72fd86b35f9ad..d23b3b0c20a36d1d652f6408d5616ff4fb6327c4
--- 1/tools/testing/selftests/drivers/net/hw/toeplitz.c
--- 2/tools/testing/selftests/net/toeplitz.c
+++ b/tools/testing/selftests/drivers/net/hw/toeplitz.c
@@@ -52,11 -52,7 +52,11 @@@
  #include <sys/types.h>
  #include <unistd.h>
  
- #include "../../../kselftest.h"
 +#include <ynl.h>
 +#include "ethtool-user.h"
 +
+ #include "kselftest.h"
 +#include "../../../net/lib/ksft.h"
  
  #define TOEPLITZ_KEY_MIN_LEN  40
  #define TOEPLITZ_KEY_MAX_LEN  60

diff --cc tools/testing/selftests/filesystems/utils.c
Simple merge

diff --cc tools/testing/selftests/iommu/iommufd_utils.h
Simple merge

diff --cc tools/testing/selftests/mm/guard-regions.c
Simple merge

diff --cc tools/testing/selftests/mm/gup_test.c
Simple merge

diff --cc tools/testing/selftests/mm/hmm-tests.c
Simple merge

diff --cc tools/testing/selftests/mm/ksm_functional_tests.c
Simple merge

diff --cc tools/testing/selftests/mm/mremap_test.c
Simple merge

diff --cc tools/testing/selftests/mm/soft-dirty.c
Simple merge

diff --cc tools/testing/selftests/mm/vm_util.c
Simple merge

diff --cc tools/testing/selftests/mm/vm_util.h
Simple merge

diff --cc tools/testing/selftests/namespaces/nsid_test.c
index 527ade0a8673a6840944ffa52869c43affc9c2b9,bf02e68e46007e5241cba6a3cef4589375259f42..b4a14c6693a54e189a0cf74e029cd32214606423
--- 1/tools/testing/selftests/namespaces/nsid_test.c
--- 2/tools/testing/selftests/namespaces/nsid_test.c
+++ b/tools/testing/selftests/namespaces/nsid_test.c
@@@ -20,25 -18,8 +20,25 @@@
  #include <linux/fs.h>
  #include <linux/limits.h>
  #include <linux/nsfs.h>
- #include "../kselftest_harness.h"
+ #include "kselftest_harness.h"
  
 +/* Fixture for tests that create child processes */
 +FIXTURE(nsid) {
 +      pid_t child_pid;
 +};
 +
 +FIXTURE_SETUP(nsid) {
 +      self->child_pid = 0;
 +}
 +
 +FIXTURE_TEARDOWN(nsid) {
 +      /* Clean up any child process that may still be running */
 +      if (self->child_pid > 0) {
 +              kill(self->child_pid, SIGKILL);
 +              waitpid(self->child_pid, NULL, 0);
 +      }
 +}
 +
  TEST(nsid_mntns_basic)
  {
        __u64 mnt_ns_id = 0;

diff --cc tools/testing/selftests/net/netlink-dumps.c
Simple merge

diff --cc tools/testing/selftests/net/tls.c
Simple merge

diff --cc tools/testing/selftests/pidfd/pidfd.h
Simple merge

diff --cc tools/testing/selftests/pidfd/pidfd_info_test.c
Simple merge

diff --cc tools/testing/selftests/riscv/hwprobe/cbo.c
index 6d99726aceac1d15726615abb2fcc306749067e1,f5208ca8090549a5928789a58c350540be11a03c..f254b2edd6ceeebc3aa1d6d08db6d59f5c65c9d0
--- 1/tools/testing/selftests/riscv/hwprobe/cbo.c
--- 2/tools/testing/selftests/riscv/hwprobe/cbo.c
+++ b/tools/testing/selftests/riscv/hwprobe/cbo.c
@@@ -15,14 -15,11 +15,14 @@@
  #include <linux/compiler.h>
  #include <linux/kernel.h>
  #include <asm/ucontext.h>
 +#include <getopt.h>
  
  #include "hwprobe.h"
- #include "../../kselftest.h"
+ #include "kselftest.h"
  
  #define MK_CBO(fn) le32_bswap((uint32_t)(fn) << 20 | 10 << 15 | 2 << 12 | 0 << 7 | 15)
 +#define MK_PREFETCH(fn) \
 +      le32_bswap(0 << 25 | (uint32_t)(fn) << 20 | 10 << 15 | 6 << 12 | 0 << 7 | 19)
  
  static char mem[4096] __aligned(4096) = { [0 ... 4095] = 0xa5 };
  

diff --cc tools/testing/selftests/timers/nanosleep.c
Simple merge

diff --cc tools/testing/selftests/timers/posix_timers.c
index a563c438ac79e244745564fb2c5ce76686f75062,5cbb3e81f35dc680aa07f2082d157a2a4cd55107..38512623622a5846ebffc18dd2acc95170b4145a
--- 1/tools/testing/selftests/timers/posix_timers.c
--- 2/tools/testing/selftests/timers/posix_timers.c
+++ b/tools/testing/selftests/timers/posix_timers.c
@@@ -18,9 -18,8 +18,9 @@@
  #include <time.h>
  #include <include/vdso/time64.h>
  #include <pthread.h>
 +#include <stdbool.h>
  
- #include "../kselftest.h"
+ #include "kselftest.h"
  
  #define DELAY 2
  

diff --cc tools/testing/selftests/vfio/lib/vfio_pci_device.c
index 13fdb4b0b10f363bddce6f287a6e9988193985b2,13e351f41c74a4f3a832addb78a8205aac5d381d..8e34b9bfc96bedb698b03ed80e56a80abc30cc88
--- 1/tools/testing/selftests/vfio/lib/vfio_pci_device.c
--- 2/tools/testing/selftests/vfio/lib/vfio_pci_device.c
+++ b/tools/testing/selftests/vfio/lib/vfio_pci_device.c
@@@ -12,15 -12,14 +12,15 @@@
  #include <sys/mman.h>
  
  #include <uapi/linux/types.h>
 +#include <linux/iommufd.h>
  #include <linux/limits.h>
  #include <linux/mman.h>
 +#include <linux/overflow.h>
  #include <linux/types.h>
  #include <linux/vfio.h>
 -#include <linux/iommufd.h>
  
- #include "../../../kselftest.h"
+ #include "kselftest.h"
 -#include <vfio_util.h>
 +#include <libvfio.h>
  
  #define PCI_SYSFS_PATH        "/sys/bus/pci/devices"
  

diff --cc tools/testing/selftests/vfio/lib/vfio_pci_driver.c
index ca0e25efbfa116ffafe484539cedf506ad22d343,fb958d895c178cb6495d305f4e029ac78330d4c4..6827f4a6febe996c934cef84aa7363c500f4c3f4
--- 1/tools/testing/selftests/vfio/lib/vfio_pci_driver.c
--- 2/tools/testing/selftests/vfio/lib/vfio_pci_driver.c
+++ b/tools/testing/selftests/vfio/lib/vfio_pci_driver.c
@@@ -1,6 -1,8 +1,6 @@@
  // SPDX-License-Identifier: GPL-2.0-only
- #include "../../../kselftest.h"
 -#include <stdio.h>
 -
+ #include "kselftest.h"
 -#include <vfio_util.h>
 +#include <libvfio.h>
  
  #ifdef __x86_64__
  extern struct vfio_pci_driver_ops dsa_ops;

diff --cc tools/testing/selftests/vfio/vfio_dma_mapping_test.c
index 5397822c3dd4b4834cb0670e4a87723487b9caba,b82f215aa1c23d2e2778670902e881bea7711a51..16eba2ecca474cd0bb7a8bf30456209ebc329174
--- 1/tools/testing/selftests/vfio/vfio_dma_mapping_test.c
--- 2/tools/testing/selftests/vfio/vfio_dma_mapping_test.c
+++ b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c
@@@ -10,9 -8,9 +10,9 @@@
  #include <linux/sizes.h>
  #include <linux/vfio.h>
  
 -#include <vfio_util.h>
 +#include <libvfio.h>
  
- #include "../kselftest_harness.h"
+ #include "kselftest_harness.h"
  
  static const char *device_bdf;
  

diff --cc tools/testing/selftests/vfio/vfio_iommufd_setup_test.c
index caf1c6291f3d51d6fea5ab483cf758b7745d479a,6854a9dedff3a6ae89bcadc455aa95ebab2116b4..17017ed3beac54e68a0a6cb5fa8b03577abe939e
--- 1/tools/testing/selftests/vfio/vfio_iommufd_setup_test.c
--- 2/tools/testing/selftests/vfio/vfio_iommufd_setup_test.c
+++ b/tools/testing/selftests/vfio/vfio_iommufd_setup_test.c
@@@ -10,8 -10,8 +10,8 @@@
  #include <sys/ioctl.h>
  #include <unistd.h>
  
 -#include <vfio_util.h>
 +#include <libvfio.h>
- #include "../kselftest_harness.h"
+ #include "kselftest_harness.h"
  
  static const char iommu_dev_path[] = "/dev/iommu";
  static const char *cdev_path;

diff --cc tools/testing/selftests/vfio/vfio_pci_device_test.c
index ecbb669b37651018b8d917faedf6d60c9ad6f97e,164c5f4b3903909217aacc676e766c5b41ff10d6..7c0fe8ce3a61f04865c3b0e43dee23f35b02cc6c
--- 1/tools/testing/selftests/vfio/vfio_pci_device_test.c
--- 2/tools/testing/selftests/vfio/vfio_pci_device_test.c
+++ b/tools/testing/selftests/vfio/vfio_pci_device_test.c
@@@ -10,9 -10,9 +10,9 @@@
  #include <linux/sizes.h>
  #include <linux/vfio.h>
  
 -#include <vfio_util.h>
 +#include <libvfio.h>
  
- #include "../kselftest_harness.h"
+ #include "kselftest_harness.h"
  
  static const char *device_bdf;
  

diff --cc tools/testing/selftests/vfio/vfio_pci_driver_test.c
index f0ca8310d6a8ea8ae2c0947d444481fe2ac97f18,d962fd77987a057694bd76b23eb2d43677d54f1a..afa0480ddd9b2a2605987f7ac30475d410308408
--- 1/tools/testing/selftests/vfio/vfio_pci_driver_test.c
--- 2/tools/testing/selftests/vfio/vfio_pci_driver_test.c
+++ b/tools/testing/selftests/vfio/vfio_pci_driver_test.c
@@@ -5,9 -5,9 +5,9 @@@
  #include <linux/sizes.h>
  #include <linux/vfio.h>
  
 -#include <vfio_util.h>
 +#include <libvfio.h>
  
- #include "../kselftest_harness.h"
+ #include "kselftest_harness.h"
  
  static const char *device_bdf;
  

diff --cc tools/testing/selftests/x86/test_vsyscall.c
Simple merge