Pull non-MM updates from Andrew Morton:
- "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen)
Fix a taskstats TGID aggregation bug where fields added in the TGID
query path were not preserved after thread exit, and adds a kselftest
covering the regression.
- "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko)
Improve lib/tests/string_helpers_kunit.c a little
- "lib/base64: decode fixes" (Josh Law)
Address minor issues in lib/base64.c
- "selftests/filelock: Make output more kselftestish" (Mark Brown)
Make the output from the ofdlocks test a bit easier for tooling to
work with. Also ignore the generated file
- "uaccess: unify inline vs outline copy_{from,to}_user() selection"
(Yury Norov)
Simplify the usercopy code by removing the selectability of inlining
copy_{from,to}_user().
- "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang)
Fix a number of possible issues in the ocfs2 xattr code
- "lib and lib/cmdline enhancements" (Dmitry Antipov)
Provide additional robustness checking in the cmdline handling code
and its in-kernel testing and selftests
- "cleanup the RAID6 P/Q library" (Christoph Hellwig)
Clean up the RAID6 P/Q library to match the recent updates to the
RAID 5 XOR library and other CRC/crypto libraries
- "ocfs2: harden inode validators against forged metadata" (Michael
Bommarito)
Add three structural checks to OCFS2 dinode validation so malformed
on-disk fields are rejected before ocfs2_populate_inode() copies them
into the in-core inode
- "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike
Rapoport)
Clean up the lib/raid code by using kmalloc() in more places
* tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits)
ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
lib: interval_tree_test: validate benchmark parameters
ocfs2: avoid moving extents to occupied clusters
treewide: fix transposed "sign" typos and update spelling.txt
ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
fat: reject BPB volumes whose data area starts beyond total sectors
selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems
lib/test_firmware: allocate the configured into_buf size
fs: efs: remove unneeded debug prints
checkpatch: cuppress warnings when Reported-by: is followed by Link:
MAINTAINERS: add Alexander as a kcov reviewer
mailmap: update Alexander Sverdlin's Email addresses
fs: fat: inode: replace sprintf() with scnprintf()
ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent
ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release()
ocfs2/dlm: require a ref for locking_state debugfs open
ocfs2: reject FITRIM ranges shorter than a cluster
ocfs2: validate fast symlink target during inode read
ocfs2: add journal NULL check in ocfs2_checkpoint_inode()
...
Pull workqueue updates from Tejun Heo:
- Continued progress toward making alloc_workqueue() unbound by
default: more callers converted to WQ_PERCPU / system_percpu_wq /
system_dfl_wq, and new warnings for queues that use neither WQ_PERCPU
nor WQ_UNBOUND or the legacy system_wq / system_unbound_wq.
- Misc: drop the now-trivial apply_wqattrs_lock()/unlock() wrappers,
forbid the TEST_WORKQUEUE benchmark from being built-in, and fix a
spurious pointer level in the worker debug-dump path.
* tag 'wq-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
drm/bridge: anx7625: Add WQ_PERCPU add to alloc_workqueue
wifi: ath6kl: fix invalid workqueue flags in ath6kl_usb_create()
btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()
workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present
workqueue: Add warnings and fallback if system_{unbound}_wq is used
workqueue: drop spurious '*' from print_worker_info() fn declaration
workqueue: forbid TEST_WORKQUEUE from being built-in
workqueue: drop apply_wqattrs_lock()/unlock() wrappers
umh: replace use of system_unbound_wq with system_dfl_wq
rapidio: rio: add WQ_PERCPU to alloc_workqueue users
media: ddbridge: add WQ_PERCPU to alloc_workqueue users
platform: cznic: turris-omnia-mcu: replace use of system_wq with system_percpu_wq
media: synopsys: hdmirx: replace use of system_unbound_wq with system_dfl_wq
virt: acrn: Add WQ_PERCPU to alloc_workqueue users
Pull objtool updates from Ingo Molnar: - A large series of KLP fixes and improvements, in preparation of the arm64 port (Josh Poimboeuf) - Fix a number of bugs and issues on specific distro, LTO, FineIBT and kCFI configs (Josh Poimboeuf) - Misc other fixes by Josh Poimboeuf and Joe Lawrence * tag 'objtool-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (53 commits) objtool/klp: Cache dont_correlate() result objtool: Improve and simplify prefix symbol detection objtool/klp: Fix kCFI prefix finding/cloning objtool: Grow __cfi_* prefix symbols for all CFI+CALL_PADDING objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls objtool: Add insn_sym() helper objtool/klp: Add correlation debugging output objtool/klp: Rewrite symbol correlation algorithm objtool/klp: Calculate object checksums klp-build: Validate short-circuit prerequisites objtool/klp: Remove "objtool --checksum" klp-build: Use "objtool klp checksum" subcommand objtool/klp: Add "objtool klp checksum" subcommand objtool: Consolidate file decoding into decode_file() objtool/klp: Extricate checksum calculation from validate_branch() objtool: Add is_cold_func() helper objtool: Add is_alias_sym() helper objtool/klp: Handle Clang .data..Lanon anonymous data sections objtool/klp: Create empty checksum sections for function-less object files objtool: Include libsubcmd headers directly from source tree ...
Add KUnit tests for '__ashldi3()', '__ashrdi3()', and '__lshrdi3()' helper functions used to implement 64-bit arithmetic shift left, arithmetic shift right and logical shift right, respectively, on a 32-bit CPUs. Tested with 'qemu-system-riscv32 -M virt' and 'qemu-system-arm -M virt'. Link: https://lore.kernel.org/20260519172259.908980-8-dmantipov@yandex.ru Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Tested-by: Charlie Jenkins <thecharlesjenkins@gmail.com> Assisted-by: Gemini:gemini-3.1-pro-preview sashiko Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Clang 23 introduces several major improvements: 1. Support for multiple arguments in the `guarded_by` and `pt_guarded_by` attributes [1]. This allows defining variables protected by multiple context locks, where read access requires holding at least one lock (shared or exclusive), and write access requires holding all of them exclusively. 2. Function pointer support [2]. We can now add attributes to function pointers just like we do on normal functions. 3. A fix to use arrays of locks [3]. Each index is now correctly treated as a separate lock instance. 4. A fix for implicit member access in attributes [4]. This allows to use __guarded_by(&foo->lock) correctly. Overall that makes it worthwhile bumping the compiler version instead of trying to make both Clang 22 and later work while supporting these new features. Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://github.com/llvm/llvm-project/pull/186838 [1] Link: https://github.com/llvm/llvm-project/pull/191187 [2] Link: https://github.com/llvm/llvm-project/pull/148551 [3] Link: https://github.com/llvm/llvm-project/pull/194457 [4] Link: https://patch.msgid.link/20260515124426.2227783-1-elver@google.com
The benchmark drives the workqueue's affinity_scope through sysfs by
filp_open()'ing /sys/bus/workqueue/devices/bench_wq/affinity_scope. When
CONFIG_TEST_WORKQUEUE=y, the module_init runs during kernel init before
userspace has mounted sysfs, so every open returns -ENOENT and the
benchmark loop spins emitting:
test_workqueue: open /sys/bus/workqueue/devices/bench_wq/affinity_scope failed: -2
Mirror the TEST_BPF pattern and add "depends on m" so Kconfig will not
let this be built into the kernel image, and document the reason in the
help text.
Fixes: 24b2e73f9700 ("workqueue: add test_workqueue benchmark module")
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
For all CONFIG_CFI+CONFIG_CALL_PADDING configs, for C functions, the __cfi_ symbols only cover the 5-byte kCFI type hash. After that there also N bytes of NOP padding between the hash and the function entry which aren't associated with any symbol. The NOPs can be replaced with actual code at runtime. Without a symbol, unwinders and tooling have no way of knowing where those bytes belong. Grow the existing __cfi_* symbols to fill that gap. Note that assembly functions with SYM_TYPED_FUNC_START() aren't affected by this issue, their __cfi_ symbols also cover the padding. Also, CONFIG_PREFIX_SYMBOLS has no reason to exist: CONFIG_CALL_PADDING is what causes the compiler to emit NOP padding before function entry (via -fpatchable-function-entry), so it's the right condition for creating prefix symbols. Remove CONFIG_PREFIX_SYMBOLS, as it's no longer needed. Simplify the LONGEST_SYM_KUNIT_TEST dependency accordingly. Rework objtool's arguments a bit to handle the variety of prefix/cfi-related cases. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Pull RISC-V updates from Paul Walmsley:
"There is one significant change outside arch/riscv in this pull
request: the addition of a set of KUnit tests for strlen(), strnlen(),
and strrchr().
Otherwise, the most notable changes are to add some RISC-V-specific
string function implementations, to remove XIP kernel support, to add
hardware error exception handling, and to optimize our runtime
unaligned access speed testing.
A few comments on the motivation for removing XIP support. It's been
broken in the RISC-V kernel for months. The code is not easy to
maintain. Furthermore, for XIP support to truly be useful for RISC-V,
we think that compile-time feature switches would need to be added for
many of the RISC-V ISA features and microarchitectural properties that
are currently implemented with runtime patching. No one has stepped
forward to take responsibility for that work, so many of us think it's
best to remove it until clear use cases and champions emerge.
Summary:
- Add Kunit correctness testing and microbenchmarks for strlen(),
strnlen(), and strrchr()
- Add RISC-V-specific strnlen(), strchr(), strrchr() implementations
- Add hardware error exception handling
- Clean up and optimize our unaligned access probe code
- Enable HAVE_IOREMAP_PROT to be able to use generic_access_phys()
- Remove XIP kernel support
- Warn when addresses outside the vmemmap range are passed to
vmemmap_populate()
- Update the ACPI FADT revision check to warn if it's not at least
ACPI v6.6, which is when key RISC-V-specific tables were added to
the specification
- Increase COMMAND_LINE_SIZE to 2048 to match ARM64, x86, PowerPC,
etc.
- Make kaslr_offset() a static inline function, since there's no need
for it to show up in the symbol table
- Add KASLR offset and SATP to the VMCOREINFO ELF notes to improve
kdump support
- Add Makefile cleanup rule for vdso_cfi copied source files, and add
a .gitignore for the build artifacts in that directory
- Remove some redundant ifdefs that check Kconfig macros
- Add missing SPDX license tag to the CFI selftest
- Simplify UTS_MACHINE assignment in the RISC-V Makefile
- Clarify some unclear comments and remove some superfluous comments
- Fix various English typos across the RISC-V codebase"
* tag 'riscv-for-linus-7.1-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (31 commits)
riscv: Remove support for XIP kernel
riscv: Reuse compare_unaligned_access() in check_vector_unaligned_access()
riscv: Split out compare_unaligned_access()
riscv: Reuse measure_cycles() in check_vector_unaligned_access()
riscv: Split out measure_cycles() for reuse
riscv: Clean up & optimize unaligned scalar access probe
riscv: lib: add strrchr() implementation
riscv: lib: add strchr() implementation
riscv: lib: add strnlen() implementation
lib/string_kunit: extend benchmarks to strnlen() and chr searches
lib/string_kunit: add performance benchmark for strlen()
lib/string_kunit: add correctness test for strrchr()
lib/string_kunit: add correctness test for strnlen()
lib/string_kunit: add correctness test for strlen()
riscv: vdso_cfi: Add .gitignore for build artifacts
riscv: vdso_cfi: Add clean rule for copied sources
riscv: enable HAVE_IOREMAP_PROT
riscv: mm: WARN_ON() for bad addresses in vmemmap_populate()
riscv: acpi: update FADT revision check to 6.6
riscv: add hardware error trap handler support
...
Pull workqueue updates from Tejun Heo:
- New default WQ_AFFN_CACHE_SHARD affinity scope subdivides LLCs into
smaller shards to improve scalability on machines with many CPUs per
LLC
- Misc:
- system_dfl_long_wq for long unbound works
- devm_alloc_workqueue() for device-managed allocation
- sysfs exposure for ordered workqueues and the EFI workqueue
- removal of HK_TYPE_WQ from wq_unbound_cpumask
- various small fixes
* tag 'wq-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (21 commits)
workqueue: validate cpumask_first() result in llc_populate_cpu_shard_id()
workqueue: use NR_STD_WORKER_POOLS instead of hardcoded value
workqueue: avoid unguarded 64-bit division
docs: workqueue: document WQ_AFFN_CACHE_SHARD affinity scope
workqueue: add test_workqueue benchmark module
tools/workqueue: add CACHE_SHARD support to wq_dump.py
workqueue: set WQ_AFFN_CACHE_SHARD as the default affinity scope
workqueue: add WQ_AFFN_CACHE_SHARD affinity scope
workqueue: fix typo in WQ_AFFN_SMT comment
workqueue: Remove HK_TYPE_WQ from affecting wq_unbound_cpumask
workqueue: unlink pwqs from wq->pwqs list in alloc_and_link_pwqs() error path
workqueue: Remove NULL wq WARN in __queue_delayed_work()
workqueue: fix parse_affn_scope() prefix matching bug
workqueue: devres: Add device-managed allocate workqueue
workqueue: Add system_dfl_long_wq for long unbound works
tools/workqueue/wq_dump.py: add NODE prefix to all node columns
tools/workqueue/wq_dump.py: fix column alignment in node_nr/max_active section
tools/workqueue/wq_dump.py: remove backslash separator from node_nr/max_active header
efi: Allow to expose the workqueue via sysfs
workqueue: Allow to expose ordered workqueues via sysfs
...
Pull locking updates from Ingo Molnar:
"Mutexes:
- Add killable flavor to guard definitions (Davidlohr Bueso)
- Remove the list_head from struct mutex (Matthew Wilcox)
- Rename mutex_init_lockep() (Davidlohr Bueso)
rwsems:
- Remove the list_head from struct rw_semaphore and
replace it with a single pointer (Matthew Wilcox)
- Fix logic error in rwsem_del_waiter() (Andrei Vagin)
Semaphores:
- Remove the list_head from struct semaphore (Matthew Wilcox)
Jump labels:
- Use ATOMIC_INIT() for initialization of .enabled (Thomas Weißschuh)
- Remove workaround for old compilers in initializations
(Thomas Weißschuh)
Lock context analysis changes and improvements:
- Add context analysis for rwsems (Peter Zijlstra)
- Fix rwlock and spinlock lock context annotations (Bart Van Assche)
- Fix rwlock support in <linux/spinlock_up.h> (Bart Van Assche)
- Add lock context annotations in the spinlock implementation
(Bart Van Assche)
- signal: Fix the lock_task_sighand() annotation (Bart Van Assche)
- ww-mutex: Fix the ww_acquire_ctx function annotations
(Bart Van Assche)
- Add lock context support in do_raw_{read,write}_trylock()
(Bart Van Assche)
- arm64, compiler-context-analysis: Permit alias analysis through
__READ_ONCE() with CONFIG_LTO=y (Marco Elver)
- Add __cond_releases() (Peter Zijlstra)
- Add context analysis for mutexes (Peter Zijlstra)
- Add context analysis for rtmutexes (Peter Zijlstra)
- Convert futexes to compiler context analysis (Peter Zijlstra)
Rust integration updates:
- Add atomic fetch_sub() implementation (Andreas Hindborg)
- Refactor various rust_helper_ methods for expansion (Boqun Feng)
- Add Atomic<*{mut,const} T> support (Boqun Feng)
- Add atomic operation helpers over raw pointers (Boqun Feng)
- Add performance-optimal Flag type for atomic booleans, to avoid
slow byte-sized RMWs on architectures that don't support them.
(FUJITA Tomonori)
- Misc cleanups and fixes (Andreas Hindborg, Boqun Feng, FUJITA
Tomonori)
LTO support updates:
- arm64: Optimize __READ_ONCE() with CONFIG_LTO=y (Marco Elver)
- compiler: Simplify generic RELOC_HIDE() (Marco Elver)
Miscellaneous fixes and cleanups by Peter Zijlstra, Randy Dunlap,
Thomas Weißschuh, Davidlohr Bueso and Mikhail Gavrilov"
* tag 'locking-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
compiler: Simplify generic RELOC_HIDE()
locking: Add lock context annotations in the spinlock implementation
locking: Add lock context support in do_raw_{read,write}_trylock()
locking: Fix rwlock support in <linux/spinlock_up.h>
lockdep: Raise default stack trace limits when KASAN is enabled
cleanup: Optimize guards
jump_label: remove workaround for old compilers in initializations
jump_label: use ATOMIC_INIT() for initialization of .enabled
futex: Convert to compiler context analysis
locking/rwsem: Fix logic error in rwsem_del_waiter()
locking/rwsem: Add context analysis
locking/rtmutex: Add context analysis
locking/mutex: Add context analysis
compiler-context-analysys: Add __cond_releases()
locking/mutex: Remove the list_head from struct mutex
locking/semaphore: Remove the list_head from struct semaphore
locking/rwsem: Remove the list_head from struct rw_semaphore
rust: atomic: Update a safety comment in impl of `fetch_add()`
rust: sync: atomic: Update documentation for `fetch_add()`
rust: sync: atomic: Add fetch_sub()
...