kernel/git/next/linux-next.git/arch/xtensa/include, branch master

Merge branch 'xtensa-for-next' of https://github.com/jcmvbkbc/linux-xtensa.git

2026-09-11T12:19:53+00:00

Merge branch 'mm-nonmm-unstable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-09-11T12:03:59+00:00

init, arch: make CONFIG_COMMAND_LINE_SIZE globally configurable

2026-09-11T03:22:07+00:00

Currently, s390 has the ability to configure the maximum kernel command line size via Kconfig (CONFIG_COMMAND_LINE_SIZE). Other architectures define a hardcoded COMMAND_LINE_SIZE macro in their setup.h headers. In some use cases, such as netboot kernels, rootfs configurations, or larger initramfs setups, a larger command line size is required. While for embedded workloads, it can be reduced to save memory. Move CONFIG_COMMAND_LINE_SIZE out of arch/s390/Kconfig and into init/Kconfig under General setup, and update every architecture's setup.h header to define COMMAND_LINE_SIZE as CONFIG_COMMAND_LINE_SIZE. For user-space API (uapi) headers, wrap the definition in an `#ifdef __KERNEL__` guard and retain the historical hardcoded default in the `#else` block. When user-space headers are installed via `make headers_install`, unifdef strips out the kernel section, ensuring the same value as before for user-space applications including ``. For S390, the range is kept the same, but other architectures have varying constraints. S390 requires a minimum of 896 bytes to protect legacy bootloaders from overwriting the .text section. ARM, M68K, and NIOS2 allocate the command line directly on severely constrained decompressor stacks, so their ranges are strictly capped at 2048 bytes to prevent deterministic stack exhaustion and boot panics. PowerPC (PPC) boot wrappers silently truncate arguments past 2048 bytes, so it is also capped at 2048 to prevent silent parameter loss. The SuperH (SUPERH) boot parameter page allocates exactly PAGE_SIZE (typically 4096 bytes), and placing a 4096-byte command line starting at offset 256 would cause strscpy() to read out of bounds; it is capped at 3840 bytes. Alpha physically limits its boot parameter block to 256 bytes, so its limit is strictly locked to 256. All other architectures are capped at 4096 bytes to prevent unreasonable allocations. Link: https://lore.kernel.org/20260818231646.804507-2-wfelipe@google.com Signed-off-by: Maciej Żenczykowski Signed-off-by: Wilson Felipe Pereira Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Arnd Bergmann Cc: Christian Borntraeger Cc: Heiko Carstens Cc: Palmer Dabbelt Cc: Sven Schnelle Cc: Vasily Gorbik Signed-off-by: Andrew Morton

mm: enable MMU_GATHER_RCU_TABLE_FREE for arc, microblaze, xtensa

2026-09-11T03:21:18+00:00

Each of these architectures directly free page tables without routing these changes through tlb_remove_ptdesc(). The use of tlb_remove_ptdesc() is required for CONFIG_MMU_GATHER_RCU_TABLE_FREE to correctly free page tables under RCU, so simply update these architectures to use these functions. Since none of the architectures share page tables or do anything unusual, nothing complicated is required here. Therefore this is simply a mechanical change - convert __pud_free_tlb(), __pmd_free_tlb() and __pte_free_tlb() to use tlb_remove_ptdesc() as required. At the point this is in place, all mmu_gather page table freeing is performed under RCU, and thus MMU_GATHER_RCU_TABLE_FREE is selected for each architecture. Note that CONFIG_MMU_GATHER_RCU_TABLE_FREE is dependent on CONFIG_MMU for xtensa to reflect the fact that nommu does not implement page table gathering. This forms part of an overall effort to switch every architecture to this mode. Link: https://lore.kernel.org/20260908-rcu-pagetable-freeing-v2-5-1f60b64e878e@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Acked-by: Kiryl Shutsemau (Meta) Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Andreas Larsson Cc: "Aneesh Kumar K.V" Cc: Anton Ivanov Cc: Arnd Bergmann Cc: Baolin Wang Cc: Barry Song Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christian Zankel Cc: Dave Hansen Cc: David Hildenbrand Cc: David S. Miller Cc: Dev Jain Cc: Dinh Nguyen Cc: Geert Uytterhoeven Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Hugh Dickins Cc: Ingo Molnar Cc: James Bottomley Cc: Jason Gunthorpe Cc: Johannes Berg Cc: John Hubbard Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Lance Yang Cc: Liam R. Howlett Cc: Madhavan Srinivasan Cc: Magnus Lindholm Cc: Marc Rutland Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Hocko Cc: Michal Simek Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Peter Xu Cc: Peter Zijlstra Cc: Richard Henderson Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Ryan Roberts Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Suren Baghdasaryan Cc: Sven Schnelle Cc: Thomas Bogendoerfer Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Vlastimil Babka Cc: WANG Xuerui Cc: Will Deacon Cc: Yoshinori Sato Cc: Zi Yan Signed-off-by: Andrew Morton

mm: drop pxd_ERROR()

2026-09-11T03:20:36+00:00

There are no more users left for any pxd_ERROR() either in generic MM or in the platform MM. Hence all these platform macros along with their generic fallback could be dropped across the tree. Link: https://lore.kernel.org/20260831054331.625505-9-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: Geert Uytterhoeven # m68k Acked-by: David Hildenbrand (Arm) Acked-by: Mike Rapoport (Microsoft) Cc: Helge Deller Cc: Huacai Chen Cc: James Bottomley Cc: John Paul Adrian Glaubitz Cc: Lorenzo Stoakes Cc: Rich Felker Cc: Samuel Holland Cc: WANG Xuerui Cc: Yoshinori Sato Signed-off-by: Andrew Morton

xtensa: fix typos in comments

2026-09-04T13:53:13+00:00

Fix typos in comments, reported by scripts/checkpatch.pl using the misspelling list in scripts/spelling.txt. Only touches comments, no code changes. Assisted-by: Cursor:claude-opus-5 Signed-off-by: Hemanth Selam Message-ID: <20260904115443.10393-1-hemanth.selam@gmail.com> Signed-off-by: Max Filippov

xtensa: atomics: drop kernel-doc comments

2026-09-04T04:34:37+00:00

The arch-specific kernel-doc comments were supposed to be deleted in commit: ef558b4b7bbb ("locking/atomic: treewide: delete arch_atomic_*() kerneldoc"), [1] but these were missed, so delete them now. Warning: ./arch/xtensa/include/asm/atomic.h:45 expecting prototype for atomic_read(). Prototype was for arch_atomic_read() instead Warning: ./arch/xtensa/include/asm/atomic.h:54 expecting prototype for atomic_set(). Prototype was for arch_atomic_set() instead Link [1]: https://lore.kernel.org/all/al3q54jxOKZujYue@J2N7QTR9R3.cambridge.arm.com/ Fixes: ef558b4b7bbb ("locking/atomic: treewide: delete arch_atomic_*() kerneldoc") Signed-off-by: Randy Dunlap Acked-by: Mark Rutland Message-ID: <20260831032947.3430049-1-rdunlap@infradead.org> Signed-off-by: Max Filippov

Merge tag 'xtensa-20260828' of https://github.com/jcmvbkbc/linux-xtensa

2026-08-28T15:55:47+00:00

Pull Xtensa updates from Max Filippov: - use strnlen() to improve iss_console_write() - remove unused function setup_profiling_timer() - fix CONFIG_XTENSA_CALIBRATE_CCOUNT macro name in comment * tag 'xtensa-20260828' of https://github.com/jcmvbkbc/linux-xtensa: xtensa: remove unused setup_profiling_timer function xtensa: correct CONFIG_XTENSA_CALIBRATE_CCOUNT macro name in comment tty: xtensa/iss: use strnlen to improve iss_console_write

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() ...

xtensa: Remove arch-specific strncpy() implementation

2026-06-18T23:37:13+00:00

strncpy() has no remaining callers in the kernel[1]. Remove the xtensa-specific inline assembly implementation and __HAVE_ARCH_STRNCPY define, falling back to the generic version in lib/string.c. Link: https://github.com/KSPP/linux/issues/90 [1] Signed-off-by: Kees Cook