kernel/linux.git/lib/Kconfig, branch v7.2-rc1

Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-06-21T20:20:19+00:00

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() ...

raid6: move to lib/raid/

2026-05-29T04:24:53+00:00

Move the raid6 code to live in lib/raid/ with the XOR code, and change the internal organization so that each architecture has a subdirectory similar to the CRC, crypto and XOR libraries, and fix up the Makefile to only build files actually needed. Also move the kunit test case from the history test/ subdirectory to tests/ and use the normal naming scheme for it. Link: https://lore.kernel.org/20260518051804.462141-4-hch@lst.de Signed-off-by: Christoph Hellwig Acked-by: Ard Biesheuvel Tested-by: Ard Biesheuvel # kunit only on arm64 Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David Sterba Cc: Heiko Carstens Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Li Nan Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Song Liu Cc: Sven Schnelle Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton

raid6: turn the userspace test harness into a kunit test

2026-05-29T04:24:52+00:00

Patch series "cleanup the RAID6 P/Q library", v3. This series cleans up the RAID6 P/Q library to match the recent updates to the RAID 5 XOR library and other CRC/crypto libraries. This includes providing properly documented external interfaces, hiding the internals, using static_call instead of indirect calls and turning the user space test suite into an in-kernel kunit test which is also extended to improve coverage. Note that this changes registration so that non-priority algorithms are not registered, which greatly helps with the benchmark time at boot time. I'd like to encourage all architecture maintainers to see if they can further optimized this by registering as few as possible algorithms when there is a clear benefit in optimized or more unrolled implementations. This patch (of 18): Currently the raid6 code can be compiled as userspace code to run the test suite. Convert that to be a kunit case with minimal changes to avoid mutating global state so that we can drop this requirement. Note that this is not a good kunit test case yet and will need a lot more work, but that is deferred until the raid6 code is moved to it's new place, which is easier if the userspace makefile doesn't need adjustments for the new location first. Link: https://lore.kernel.org/20260518051804.462141-1-hch@lst.de Link: https://lore.kernel.org/20260518051804.462141-2-hch@lst.de Signed-off-by: Christoph Hellwig Acked-by: Ard Biesheuvel Tested-by: Ard Biesheuvel # kunit only on arm64 Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David Sterba Cc: Heiko Carstens Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Li Nan Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Song Liu Cc: Sven Schnelle Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton

treewide: fix indentation and whitespace in Kconfig files

2026-05-29T04:24:42+00:00

Clean up inconsistent indentation (mixing tabs and spaces) and remove extraneous whitespace in several Kconfig files across the tree. This is a purely cosmetic change to improve readability. Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Link: https://lore.kernel.org/20260407053945.14116-1-linux.amoon@gmail.com Signed-off-by: Anand Moon Reviewed-by: Jan Kara [fs] Reviewed-by: Liam R. Howlett [mm] Reviewed-by: Lorenzo Stoakes [mm] Reviewed-by: Christian Brauner Signed-off-by: Andrew Morton

lib/bitrev: Introduce GENERIC_BITREVERSE

2026-05-28T15:39:16+00:00

The generic bit reversal implementation is controlled by !HAVE_ARCH_BITREVERSE. This makes it difficult for architectures to provide a hardware-accelerated implementation while being able to fall back to the generic version if needed. This patch adds GENERIC_BITREVERSE, so bitreverse API is controlled by BITREVERSE, GENERIC_BITREVERSE and HAVE_ARCH_BITREVERSE options. The relationship between them is described as follows: - BITREVERSE is selected by user code; it's required to generate the API; - Architectures may select HAVE_ARCH_BITREVERSE and provide an arch implementation in arch/$(ARCH)/include/asm/bitrev.h. - if HAVE_ARCH_BITREVERSE isn't set, BITREVERSE selects GENERIC_BITREVERSE; - if GENERIC_BITREVERSE is set and HAVE_ARCH_BITREVERSE is not, the kernel provides generic implementation only, and wires bitrevXX() to it. - if HAVE_ARCH_BITREVERSE is set and GENERIC_BITREVERSE is not, the arch code provides __arch_bitrevXX(), and it is wired to bitrevXX(); - if both GENERIC_BITREVERSE and HAVE_ARCH_BITREVERSE are selected, the kernel generates generic___bitrev(), but wires bitrev() to the __arch_bitrev(). The last option allows architectures to use generic___bitrev() as a fallback option. Drivers and core code should never select GENERIC_BITREVERSE or HAVE_ARCH_BITREVERSE explicitly. Architectures that require generic bitreverse API as a fallback should explicitly enable GENERIC_BITREVERSE together with HAVE_ARCH_BITREVERSE. Signed-off-by: Yury Norov

arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE

2026-05-28T15:39:16+00:00

Architectures may have bit reversal instructions, but if the API not needed, the corresponding option should not be selected because it may lead to generating the unneeded code. Signed-off-by: Yury Norov

xor: move to lib/raid/

2026-04-03T06:36:16+00:00

Move the RAID XOR code to lib/raid/ as it has nothing to do with the crypto API. Link: https://lkml.kernel.org/r/20260327061704.3707577-6-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Eric Biggers Tested-by: Eric Biggers Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Andreas Larsson Cc: Anton Ivanov Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Chris Mason Cc: Christian Borntraeger Cc: Dan Williams Cc: David S. Miller Cc: David Sterba Cc: Heiko Carstens Cc: Herbert Xu Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: Jason A. Donenfeld Cc: Johannes Berg Cc: Li Nan Cc: Madhavan Srinivasan Cc: Magnus Lindholm Cc: Matt Turner Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Richard Henderson Cc: Richard Weinberger Cc: Russell King Cc: Song Liu Cc: Sven Schnelle Cc: Ted Ts'o Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton

lib: polynomial: move to math/ subfolder

2026-03-28T04:19:39+00:00

Patch series "lib: polynomial: Move to math/ and clean up", v2. While removing Baikal SoC and platform code pieces I found that this code belongs to lib/math/ rather than generic lib/. Hence the move and followed up cleanups. This patch (of 3): The algorithm behind polynomial belongs to our collection of math equations and expressions handling. Move it to math/ subfolder where others of the kind are located. Link: https://lkml.kernel.org/r/20260302092831.2267785-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko Reviewed-by: Kuan-Wei Chiu Cc: Randy Dunlap Signed-off-by: Andrew Morton

lib/glob: convert selftest to KUnit

2026-01-27T03:07:13+00:00

This patch converts the existing glob selftest (lib/globtest.c) to use the KUnit framework (lib/tests/glob_kunit.c). The new test: - Migrates all 64 test cases from the original test to the KUnit suite. - Removes the custom 'verbose' module parameter as KUnit handles logging. - Updates Kconfig.debug and Makefile to support the new KUnit test. - Updates Kconfig and Makefile to remove the original selftest. - Updates GLOB_SELFTEST to GLOB_KUNIT_TEST for arch/m68k/configs. This commit is verified by `./tools/testing/kunit/kunit.py run' with the .kunit/.kunitconfig: CONFIG_KUNIT=y CONFIG_GLOB_KUNIT_TEST=y Link: https://lkml.kernel.org/r/20260108120753.27339-1-note351@hotmail.com Signed-off-by: Kir Chou Acked-by: Geert Uytterhoeven Reviewed-by: David Gow Reviewed-by: Kuan-Wei Chiu Cc: Signed-off-by: Andrew Morton

Merge tag 'cache-for-v6.19' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/drivers-late

2025-11-27T22:00:45+00:00

standalone cache drivers for v6.19 ccache: Add a compatible for the pic64gx SoC. No driver change needed, as it falls back to the PolarFire SoC. hisi hha/generic cpu cache maintenance: Add support for a non-architectural mechanism for invalidating memory regions, needed for some cxl implementations on arm64 (and probably elsewhere in the future). The HiSilicon Hydra Home Agent is the first driver to provide this support. Signed-off-by: Conor Dooley * tag 'cache-for-v6.19' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux: MAINTAINERS: refer to intended file in STANDALONE CACHE CONTROLLER DRIVERS cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent cache: Make top level Kconfig menu a boolean dependent on RISCV MAINTAINERS: Add Jonathan Cameron to drivers/cache and add lib/cache_maint.c + header arm64: Select GENERIC_CPU_CACHE_MAINTENANCE lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION memregion: Support fine grained invalidate by cpu_cache_invalidate_memregion() memregion: Drop unused IORES_DESC_* parameter from cpu_cache_invalidate_memregion() dt-bindings: cache: sifive,ccache0: add a pic64gx compatible Signed-off-by: Arnd Bergmann