Changes in Kconfig

2e05544060b9fef5d4d0e0172944e6956c55080f - Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Sun, 21 Jun 2026 22:20:19 +0200

Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull 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() ... List of files: /linux/lib/Kconfig

3626738bc7147d52cb49f3994a9846aa2d34810a - raid6: move to lib/raid/

Mon, 18 May 2026 07:17:46 +0200

raid6: move to lib/raid/Move the raid6 code to live in lib/raid/ with the XOR code, and change theinternal organization so that each architecture has a subdirectory similarto the CRC, crypto and XOR libraries, and fix up the Makefile to onlybuild files actually needed.Also move the kunit test case from the history test/ subdirectory totests/ and use the normal naming scheme for it.Link: https://lore.kernel.org/20260518051804.462141-4-hch@lst.deSigned-off-by: Christoph Hellwig Acked-by: Ard Biesheuvel Tested-by: Ard Biesheuvel # kunit only on arm64Cc: 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 List of files: /linux/lib/Kconfig

c4697486fc232e821a33191d809d0ac3bb600027 - raid6: turn the userspace test harness into a kunit test

Mon, 18 May 2026 07:17:44 +0200

raid6: turn the userspace test harness into a kunit testPatch series "cleanup the RAID6 P/Q library", v3.This series cleans up the RAID6 P/Q library to match the recent updates tothe RAID 5 XOR library and other CRC/crypto libraries. This includesproviding properly documented external interfaces, hiding the internals,using static_call instead of indirect calls and turning the user spacetest suite into an in-kernel kunit test which is also extended to improvecoverage.Note that this changes registration so that non-priority algorithms arenot registered, which greatly helps with the benchmark time at boot time. I'd like to encourage all architecture maintainers to see if they canfurther optimized this by registering as few as possible algorithms whenthere 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 testsuite. Convert that to be a kunit case with minimal changes to avoidmutating 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 morework, but that is deferred until the raid6 code is moved to it's newplace, which is easier if the userspace makefile doesn't need adjustmentsfor the new location first.Link: https://lore.kernel.org/20260518051804.462141-1-hch@lst.deLink: https://lore.kernel.org/20260518051804.462141-2-hch@lst.deSigned-off-by: Christoph Hellwig Acked-by: Ard Biesheuvel Tested-by: Ard Biesheuvel # kunit only on arm64Cc: 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 List of files: /linux/lib/Kconfig

97bd80a91858ea72be5aa4565af2721fb732eba6 - treewide: fix indentation and whitespace in Kconfig files

Tue, 07 Apr 2026 07:39:34 +0200

treewide: fix indentation and whitespace in Kconfig filesClean up inconsistent indentation (mixing tabs and spaces) and removeextraneous whitespace in several Kconfig files across the tree. This is apurely cosmetic change to improve readability.Adjust indentation from spaces to tab (+optional two spaces) as incoding style with command like:$ sed -e 's/^ /\t/' -i */KconfigLink: https://lore.kernel.org/20260407053945.14116-1-linux.amoon@gmail.comSigned-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 List of files: /linux/lib/Kconfig

00751d655ece97fe85ce9193542ee8396fe98651 - lib/bitrev: Introduce GENERIC_BITREVERSE

Wed, 06 May 2026 19:52:03 +0200

lib/bitrev: Introduce GENERIC_BITREVERSEThe generic bit reversal implementation is controlled by!HAVE_ARCH_BITREVERSE. This makes it difficult for architectures toprovide a hardware-accelerated implementation while being able tofall back to the generic version if needed.This patch adds GENERIC_BITREVERSE, so bitreverse API is controlled byBITREVERSE, GENERIC_BITREVERSE and HAVE_ARCH_BITREVERSE options. Therelationship 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 afallback option.Drivers and core code should never select GENERIC_BITREVERSE orHAVE_ARCH_BITREVERSE explicitly.Architectures that require generic bitreverse API as a fallback shouldexplicitly enable GENERIC_BITREVERSE together with HAVE_ARCH_BITREVERSE.Signed-off-by: Yury Norov List of files: /linux/lib/Kconfig

42d9c75e8b9cae9583c228617be38ab1637fd574 - arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE

Wed, 06 May 2026 19:52:02 +0200

arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSEArchitectures may have bit reversal instructions, but if the API notneeded, the corresponding option should not be selected because it maylead to generating the unneeded code.Signed-off-by: Yury Norov List of files: /linux/lib/Kconfig

9e229025e2474115c151f08bdbdd3d8d5f159af3 - xor: move to lib/raid/

Fri, 27 Mar 2026 07:16:37 +0100

xor: move to lib/raid/Move the RAID XOR code to lib/raid/ as it has nothing to do with thecrypto API.Link: https://lkml.kernel.org/r/20260327061704.3707577-6-hch@lst.deSigned-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 List of files: /linux/lib/Kconfig

7eece6917c541af24a6161b10a150b5744695f80 - lib: polynomial: move to math/ subfolder

Mon, 02 Mar 2026 10:28:07 +0100

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

bf45794244ca1fb1c135754f36ff765eea01f9e6 - lib/glob: convert selftest to KUnit

Thu, 08 Jan 2026 13:07:53 +0100

lib/glob: convert selftest to KUnitThis patch converts the existing glob selftest (lib/globtest.c) to use theKUnit 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=yCONFIG_GLOB_KUNIT_TEST=yLink: https://lkml.kernel.org/r/20260108120753.27339-1-note351@hotmail.comSigned-off-by: Kir Chou Acked-by: Geert Uytterhoeven Reviewed-by: David Gow Reviewed-by: Kuan-Wei Chiu Cc: Signed-off-by: Andrew Morton List of files: /linux/lib/Kconfig

8e2baac0f2bb5ceff5858ac89eff04a67c98b789 - Merge tag 'cache-for-v6.19' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/drivers-late

Thu, 27 Nov 2025 23:00:45 +0100

Merge tag 'cache-for-v6.19' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/drivers-latestandalone cache drivers for v6.19ccache:Add a compatible for the pic64gx SoC. No driver change needed, as itfalls back to the PolarFire SoC.hisi hha/generic cpu cache maintenance:Add support for a non-architectural mechanism for invalidating memoryregions, needed for some cxl implementations on arm64 (and probablyelsewhere in the future). The HiSilicon Hydra Home Agent is the firstdriver 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 compatibleSigned-off-by: Arnd Bergmann List of files: /linux/lib/Kconfig

c460697d3472d4252917fba9bbc1d1a23eafc124 - lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION

Mon, 17 Nov 2025 11:47:56 +0100

lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGIONARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION provides the mechanism forinvalidating certain memory regions in a cache-incoherent manner. Currentlythis is used by NVDIMM and CXL memory drivers in cases where it isnecessary to flush all data from caches by physical address range.The operations in question are effectively memory hotplug, where staledata might otherwise remain in the caches.This is separate from the invalidates done to enable use of non-coherentDMA masters, primarily in terms of when it is needed (not related to DMAmappings) and how deep the flush must push data. The flushes done fornon-coherent DMA only need to reach the Point of Coherence of a single host(which is often nearer CPUs and DMA masters than the physical storage).This operation must push the data out of non architectural caches(memory-side caches, write buffers etc) and typically all the way to thememory device.In some architectures these operations are supported by system componentsthat may become available only later in boot as they are either presenton a discoverable bus, or via a firmware description of an MMIO interface(e.g. ACPI DSDT). Provide a framework to handle this case.Architectures can opt in for this support viaCONFIG_GENERIC_CPU_CACHE_MAINTENANCEAdd a registration framework. Each driver provides an ops structure andthe first op is Write Back and Invalidate by PA Range. The driver mayover invalidate.For systems that can perform this operation asynchronously an optionalcompletion check operation is also provided. If present that must be calledto ensure that the action has finished. This provides a considerableperformance advantage if multiple agents are involved in the maintenanceoperation.When multiple agents are present in the system each should register withthis framework and the core code will issue the invalidate to all of thembefore checking for completion on each. This is done to avoid need forfiltering in the core code which can become complex when interleave,potentially across different cache coherency hardware is going on, so itis easier to tell everyone and let those who don't care do nothing.Signed-off-by: Yicong Yang Co-developed-by: Jonathan Cameron Signed-off-by: Jonathan Cameron Acked-by: Conor Dooley Signed-off-by: Conor Dooley List of files: /linux/lib/Kconfig

191cac349c8eeeb6d64453b8db194d3ad42ca9dc - lib/digsig: Use SHA-1 library instead of crypto_shash

Fri, 15 Aug 2025 04:17:33 +0200

lib/digsig: Use SHA-1 library instead of crypto_shashNow that a SHA-1 library API is available, use it instead ofcrypto_shash. This is simpler and faster.Signed-off-by: Eric Biggers Reviewed-by: Paul Menzel Signed-off-by: Mimi Zohar List of files: /linux/lib/Kconfig

89a51591405e09a862b9ca1ccfa880986c495c3c - lib/crc: Move files into lib/crc/

Sat, 07 Jun 2025 22:04:43 +0200

lib/crc: Move files into lib/crc/Move all CRC files in lib/ into a subdirectory lib/crc/ to keep themfrom cluttering up the main lib/ directory.Reviewed-by: "Martin K. Petersen" Acked-by: Ingo Molnar Acked-by: "Jason A. Donenfeld" Link: https://lore.kernel.org/r/20250607200454.73587-2-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

1224b218a4b9203656ecc932152f4c81a97b4fcc - pldmfw: Select CRC32 when PLDMFW is selected

Fri, 13 Jun 2025 18:46:20 +0200

pldmfw: Select CRC32 when PLDMFW is selectedpldmfw calls crc32 code and depends on it being enabled, elsethere is a link error as follows. So PLDMFW should select CRC32. lib/pldmfw/pldmfw.o: In function `pldmfw_flash_image': pldmfw.c:(.text+0x70f): undefined reference to `crc32_le_base'This problem was introduced by commit b8265621f488 ("Add pldmfw libraryfor PLDM firmware update").It manifests as of commit d69ea414c9b4 ("ice: implement device flashupdate via devlink").And is more likely to occur as of commit 9ad19171b6d6 ("lib/crc: removeunnecessary prompt for CONFIG_CRC32 and drop 'default y'").Found by chance while exercising builds based on tinyconfig.Fixes: b8265621f488 ("Add pldmfw library for PLDM firmware update")Signed-off-by: Simon Horman Reviewed-by: Jacob Keller Link: https://patch.msgid.link/20250613-pldmfw-crc32-v1-1-f3fad109eee6@kernel.orgSigned-off-by: Jakub Kicinski List of files: /linux/lib/Kconfig

b261d2222063a9a8b9ec284244c285f2998ee01e - lib/crc: remove CONFIG_LIBCRC32C

Wed, 02 Apr 2025 00:16:00 +0200

lib/crc: remove CONFIG_LIBCRC32CNow that LIBCRC32C does nothing besides select CRC32, make every optionthat selects LIBCRC32C instead select CRC32 directly. Then removeLIBCRC32C.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-8-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

31ab49a99f0572da6a62f121878e2155b04904e5 - lib/crc: document all the CRC library kconfig options

Wed, 02 Apr 2025 00:15:59 +0200

lib/crc: document all the CRC library kconfig optionsPrevious commits removed all the original CRC kconfig help text, sinceit was oriented towards people configuring the kernel, and the optionsare no longer user-selectable. However, it's still useful for there tobe help text for kernel developers. Add this.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-7-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

a0d55dd740db75acca2afbd84a2f54f644dbc268 - lib/crc: remove unnecessary prompt for CONFIG_CRC_ITU_T

Wed, 02 Apr 2025 00:15:58 +0200

lib/crc: remove unnecessary prompt for CONFIG_CRC_ITU_TAll modules that need CONFIG_CRC_ITU_T already select it, so there is noneed to bother users about the option.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-6-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

a6d0dbba950880e269d433222ca6d516ebe8a6ae - lib/crc: remove unnecessary prompt for CONFIG_CRC_T10DIF

Wed, 02 Apr 2025 00:15:57 +0200

lib/crc: remove unnecessary prompt for CONFIG_CRC_T10DIFAll modules that need CONFIG_CRC_T10DIF already select it, so there is noneed to bother users about the option.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-5-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

2038af8edae281283ee10e220a3df19dcad3b61c - lib/crc: remove unnecessary prompt for CONFIG_CRC16

Wed, 02 Apr 2025 00:15:56 +0200

lib/crc: remove unnecessary prompt for CONFIG_CRC16All modules that need CONFIG_CRC16 already select it, so there is noneed to bother users about the option.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-4-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig

7939da264bcc91ced4d01014241a581e79d414d9 - lib/crc: remove unnecessary prompt for CONFIG_CRC_CCITT

Wed, 02 Apr 2025 00:15:55 +0200

lib/crc: remove unnecessary prompt for CONFIG_CRC_CCITTAll modules that need CONFIG_CRC_CCITT already select it, so there is noneed to bother users about the option.Reviewed-by: Christoph Hellwig Reviewed-by: "Martin K. Petersen" Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20250401221600.24878-3-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux/lib/Kconfig