commit d1db4118489fffd2b2f612140b7acbb477880839 upstream.

The Assisted-by tag was introduced in
Documentation/process/coding-assistants.rst for attributing AI tool
contributions to kernel patches.  However, checkpatch.pl did not recognize
this tag, causing two issues:

  WARNING: Non-standard signature: Assisted-by:
  ERROR: Unrecognized email address: 'AGENT_NAME:MODEL_VERSION'

Fix this by:
1. Adding Assisted-by to the recognized $signature_tags list
2. Skipping email validation for Assisted-by lines since they use the
   AGENT_NAME:MODEL_VERSION format instead of an email address
3. Warning when the Assisted-by value doesn't match the expected format

Link: https://lkml.kernel.org/r/20260311215818.518930-1-sashal@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Reported-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The checkpatch.pl script currently warns against the use of strcpy,
strlcpy, and strncpy, recommending strscpy as a safer alternative. 
However, these warnings are also triggered for code under tools/ and
scripts/, which are userspace utilities where strscpy is not available. 
This patch suppresses these warnings for files in tools/ and scripts/.

Link: https://lkml.kernel.org/r/20250923171722.7798-1-suchitkarunakaran@gmail.com
Signed-off-by: Suchit Karunakaran <suchitkarunakaran@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Dave Gilbert noticed that checkpatch warns about URL links over 75 chars
in length in commit logs.

Fix that.

Link: https://lkml.kernel.org/r/3529faaf84a5a9a96c5c0ec4183ae0ba6e97673c.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Dave Gilbert <linux@treblig.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Pull non-MM updates from Andrew Morton:
 "Significant patch series in this pull request:

   - "squashfs: Remove page->mapping references" (Matthew Wilcox) gets
     us closer to being able to remove page->mapping

   - "relayfs: misc changes" (Jason Xing) does some maintenance and
     minor feature addition work in relayfs

   - "kdump: crashkernel reservation from CMA" (Jiri Bohac) switches
     us from static preallocation of the kdump crashkernel's working
     memory over to dynamic allocation. So the difficulty of a-priori
     estimation of the second kernel's needs is removed and the first
     kernel obtains extra memory

   - "generalize panic_print's dump function to be used by other
     kernel parts" (Feng Tang) implements some consolidation and
     rationalization of the various ways in which a failing kernel
     splats information at the operator

* tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (80 commits)
  tools/getdelays: add backward compatibility for taskstats version
  kho: add test for kexec handover
  delaytop: enhance error logging and add PSI feature description
  samples: Kconfig: fix spelling mistake "instancess" -> "instances"
  fat: fix too many log in fat_chain_add()
  scripts/spelling.txt: add notifer||notifier to spelling.txt
  xen/xenbus: fix typo "notifer"
  net: mvneta: fix typo "notifer"
  drm/xe: fix typo "notifer"
  cxl: mce: fix typo "notifer"
  KVM: x86: fix typo "notifer"
  MAINTAINERS: add maintainers for delaytop
  ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below()
  ucount: fix atomic_long_inc_below() argument type
  kexec: enable CMA based contiguous allocation
  stackdepot: make max number of pools boot-time configurable
  lib/xxhash: remove unused functions
  init/Kconfig: restore CONFIG_BROKEN help text
  lib/raid6: update recov_rvv.c zero page usage
  docs: update docs after introducing delaytop
  ...

Pull RCU updates from Neeraj Upadhyay:
 "Expedited grace period updates:

   - Protect against early RCU exp quiescent state reporting during exp
     grace period initialization

   - Remove superfluous barrier in task unblock path

   - Remove the CPU online quiescent state report optimization, which is
     error prone for certain scenarios

   - Add warning for unexpected pending requested expedited quiescent
     state on dying CPU

  Core:

   - Robustify rcu_is_cpu_rrupt_from_idle() by using more accurate
     indicators of the actual context tracking state of a CPU

   - Handle ->defer_qs_iw_pending field data race

   - Enable rcu_normal_wake_from_gp by default on systems with <= 16
     CPUs

   - Fix lockup in rcu_read_unlock() due to recursive irq_exit() calls

   - Refactor expedited handling condition in rcu_read_unlock_special()

   - Documentation updates for hotplug and GP init scan ordering,
     separation of rcu_state and rnp's gp_seq states, quiescent state
     reporting for offline CPUs

  torture-scripts:

   - Cleanup and improve scripts : remove superfluous warnings for
     disabled tests; better handling of kvm.sh --kconfig arg; suppress
     some confusing diagnostics; tolerate bad kvm.sh args; add new
     diagnostic for build output; fail allmodconfig testing on warnings

   - Include RCU_TORTURE_TEST_CHK_RDR_STATE config for KCSAN kernels

   - Disable default RCU-tasks and clocksource-wdog testing on arm64

   - Add EXPERT Kconfig option for arm64 KCSAN runs

   - Remove SRCU-lite testing

  rcutorture:

   - Start torture writer threads creation after reader threads to
     handle race in SRCU-P scenario

   - Add SRCU down_read()/up_read() test

   - Add diagnostics for delayed SRCU up_read(), unmatched up_read(),
     print number of up/down readers and the number of such readers
     which migrated to other CPU

   - Ignore certain unsupported configurations for trivial RCU test

   - Fix splats in RT kernels due to inaccurate checks for BH-disabled
     context

   - Enable checks and logs to capture intentionally exercised
     unexpected scenarios (too short readers) for BUSTED test

   - Remove SRCU-lite testing

  srcu:

   - Expedite SRCU-fast grace periods

   - Remove SRCU-lite implementation

   - Add guards for SRCU-fast readers

  rcu nocb:

   - Dump NOCB group leader state on stall detection

   - Robustify nocb_cb_kthread pointer accesses

   - Fix delayed execution of hurry callbacks when LAZY_RCU is enabled

  refscale:

   - Fix multiplication overflow in "loops" and "nreaders" calculations"

* tag 'rcu.release.v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (49 commits)
  rcu: Document concurrent quiescent state reporting for offline CPUs
  rcu: Document separation of rcu_state and rnp's gp_seq
  rcu: Document GP init vs hotplug-scan ordering requirements
  srcu: Add guards for SRCU-fast readers
  rcu: Fix delayed execution of hurry callbacks
  rcu: Refactor expedited handling check in rcu_read_unlock_special()
  checkpatch: Remove SRCU-lite deprecation
  srcu: Remove SRCU-lite implementation
  srcu: Expedite SRCU-fast grace periods
  rcutorture: Remove support for SRCU-lite
  rcutorture: Remove SRCU-lite scenarios
  torture: Remove support for SRCU-lite
  torture: Make torture.sh --allmodconfig testing fail on warnings
  torture: Add "ERROR" diagnostic for testing kernel-build output
  torture: Make torture.sh tolerate runs having bad kvm.sh arguments
  torture: Add textid.txt file to --do-allmodconfig and --do-rcu-rust runs
  torture: Extract testid.txt generation to separate script
  torture: Suppress "find" diagnostics from torture.sh --do-none run
  torture: Provide EXPERT Kconfig option for arm64 KCSAN torture.sh runs
  rcu: Fix rcu_read_unlock() deadloop due to IRQ work
  ...

Now that SRCU-lite has been removed from the kernel, let's remove the
now-redundant deprecation from checkpatch.pl.

Signed-off-by: "Paul E. McKenney" <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org>

All of the ID tables based on <linux/mod_devicetable.h> (of_device_id,
pci_device_id, ...) require their arrays to end in an empty sentinel
value.  That's usually spelled with an empty initializer entry (e.g.,
"{}"), but also sometimes with explicit 0 entries, field initializers
(e.g., '.id = ""'), or even a macro entry (like PCMCIA_DEVICE_NULL).

Without a sentinel, device-matching code may read out of bounds.

I've found a number of such bugs in driver reviews, and we even
occasionally commit one to the tree.  See commit 5751eee5c620 ("i2c:
nomadik: Add missing sentinel to match table") for example.

Teach checkpatch to find these ID tables, and complain if it looks like
there wasn't a sentinel value.

Test output:

  $ git format-patch -1 a0d15cc47f29be6d --stdout | scripts/checkpatch.pl -
  ERROR: missing sentinel in ID array
  #57: FILE: drivers/i2c/busses/i2c-nomadik.c:1073:
  +static const struct of_device_id nmk_i2c_eyeq_match_table[] = {
   	{
   		.compatible = "XXXXXXXXXXXXXXXXXX",
   		.data = (void *)(NMK_I2C_EYEQ_FLAG_32B_BUS | NMK_I2C_EYEQ_FLAG_IS_EYEQ5),
   	},
   };

  total: 1 errors, 0 warnings, 66 lines checked

  NOTE: For some of the reported defects, checkpatch may be able to
        mechanically convert to the typical style using --fix or --fix-inplace.

  "[PATCH] i2c: nomadik: switch from of_device_is_compatible() to" has style problems, please review.

  NOTE: If any of the errors are false positives, please report
        them to the maintainer, see CHECKPATCH in MAINTAINERS.

When run across the entire tree (scripts/checkpatch.pl -q --types
MISSING_SENTINEL -f ...), false positives exist:

* where macros are used that hide the table from analysis
  (e.g., drivers/gpu/drm/radeon/radeon_drv.c / radeon_PCI_IDS).
  There are fewer than 5 of these.

* where such tables are processed correctly via ARRAY_SIZE() (fewer than
  5 instances). This is by far not the typical usage of *_device_id
  arrays.

* some odd parsing artifacts, where ctx_statement_block() seems to quit
  in the middle of a block due to #if/#else/#endif.

Also, not every "struct *_device_id" is in fact a sentinel-requiring
structure, but even with such types, false positives are very rare.

Link: https://lkml.kernel.org/r/20250702235245.1007351-1-briannorris@chromium.org
Signed-off-by: Brian Norris <briannorris@chromium.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

The current code that checks for misspelling verifies, in a more
complex regex, if $rawline matches [^\w]($misspellings)[^\w]

Being $rawline a byte-string, a utf-8 character in $rawline can
match the non-word-char [^\w].
E.g.:
	./scripts/checkpatch.pl --git 81c2f059ab9
	WARNING: 'ment' may be misspelled - perhaps 'meant'?
	#36: FILE: MAINTAINERS:14360:
	+M:     Clément Léger <clement.leger@bootlin.com>
	            ^^^^

Use a utf-8 version of $rawline for spell checking.

Link: https://lkml.kernel.org/r/20250616-b4-checkpatch-upstream-v2-1-5600ce4a3b43@foss.st.com
Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Historically, the RGMII PHY modes specified in Device Trees have been
used inconsistently, often referring to the usage of delays on the PHY
side rather than describing the board; many drivers still implement this
incorrectly.

Require a comment in Devices Trees using these modes (usually mentioning
that the delay is realized on the PCB), so we can avoid adding more
incorrect uses (or will at least notice which drivers still need to be
fixed).

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/bc112b8aa510cf9df9ab33178d122f234d0aebf7.1750756583.git.matthias.schiffer@ew.tq-group.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Pull non-MM updates from Andrew Morton:

 - "hung_task: extend blocking task stacktrace dump to semaphore" from
   Lance Yang enhances the hung task detector.

   The detector presently dumps the blocking tasks's stack when it is
   blocked on a mutex. Lance's series extends this to semaphores

 - "nilfs2: improve sanity checks in dirty state propagation" from
   Wentao Liang addresses a couple of minor flaws in nilfs2

 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn
   fixes a couple of issues in the gdb scripts

 - "Support kdump with LUKS encryption by reusing LUKS volume keys" from
   Coiby Xu addresses a usability problem with kdump.

   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem. A full writeup of this is in
   the series [0/N] cover letter

 - "sysfs: add counters for lockups and stalls" from Max Kellermann adds
   /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and
   /sys/kernel/rcu_stall_count

 - "fork: Page operation cleanups in the fork code" from Pasha Tatashin
   implements a number of code cleanups in fork.c

 - "scripts/gdb/symbols: determine KASLR offset on s390 during early
   boot" from Ilya Leoshkevich fixes some s390 issues in the gdb
   scripts

* tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits)
  llist: make llist_add_batch() a static inline
  delayacct: remove redundant code and adjust indentation
  squashfs: add optional full compressed block caching
  crash_dump, nvme: select CONFIGFS_FS as built-in
  scripts/gdb/symbols: determine KASLR offset on s390 during early boot
  scripts/gdb/symbols: factor out pagination_off()
  scripts/gdb/symbols: factor out get_vmlinux()
  kernel/panic.c: format kernel-doc comments
  mailmap: update and consolidate Casey Connolly's name and email
  nilfs2: remove wbc->for_reclaim handling
  fork: define a local GFP_VMAP_STACK
  fork: check charging success before zeroing stack
  fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code
  fork: clean-up ifdef logic around stack allocation
  kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count
  kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count
  x86/crash: make the page that stores the dm crypt keys inaccessible
  x86/crash: pass dm crypt keys to kdump kernel
  Revert "x86/mm: Remove unused __set_memory_prot()"
  crash_dump: retrieve dm crypt keys in kdump kernel
  ...