linux/lib/tests, branch master

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00Z

This converts some of the visually simpler cases that have been split over multiple lines. I only did the ones that are easy to verify the resulting diff by having just that final GFP_KERNEL argument on the next line. Somebody should probably do a proper coccinelle script for this, but for me the trivial script actually resulted in an assertion failure in the middle of the script. I probably had made it a bit _too_ trivial. So after fighting that far a while I decided to just do some of the syntactically simpler cases with variations of the previous 'sed' scripts. The more syntactically complex multi-line cases would mostly really want whitespace cleanup anyway. Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51Z

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28Z

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-02-12T20:13:01Z

Pull non-MM updates from Andrew Morton: - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves disk space by teaching ocfs2 to reclaim suballocator block group space (Heming Zhao) - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the ARRAY_END() macro and uses it in various places (Alejandro Colomar) - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the page size (Pnina Feder) - "kallsyms: Prevent invalid access when showing module buildid" cleans up kallsyms code related to module buildid and fixes an invalid access crash when printing backtraces (Petr Mladek) - "Address page fault in ima_restore_measurement_list()" fixes a kexec-related crash that can occur when booting the second-stage kernel on x86 (Harshit Mogalapalli) - "kho: ABI headers and Documentation updates" updates the kexec handover ABI documentation (Mike Rapoport) - "Align atomic storage" adds the __aligned attribute to atomic_t and atomic64_t definitions to get natural alignment of both types on csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain) - "kho: clean up page initialization logic" simplifies the page initialization logic in kho_restore_page() (Pratyush Yadav) - "Unload linux/kernel.h" moves several things out of kernel.h and into more appropriate places (Yury Norov) - "don't abuse task_struct.group_leader" removes the usage of ->group_leader when it is "obviously unnecessary" (Oleg Nesterov) - "list private v2 & luo flb" adds some infrastructure improvements to the live update orchestrator (Pasha Tatashin) * tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits) watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency procfs: fix missing RCU protection when reading real_parent in do_task_stat() watchdog/softlockup: fix sample ring index wrap in need_counting_irqs() kcsan, compiler_types: avoid duplicate type issues in BPF Type Format kho: fix doc for kho_restore_pages() tests/liveupdate: add in-kernel liveupdate test liveupdate: luo_flb: introduce File-Lifecycle-Bound global state liveupdate: luo_file: Use private list list: add kunit test for private list primitives list: add primitives for private list manipulations delayacct: fix uapi timespec64 definition panic: add panic_force_cpu= parameter to redirect panic to a specific CPU netclassid: use thread_group_leader(p) in update_classid_task() RDMA/umem: don't abuse current->group_leader drm/pan*: don't abuse current->group_leader drm/amd: kill the outdated "Only the pthreads threading model is supported" checks drm/amdgpu: don't abuse current->group_leader android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() android/binder: don't abuse current->group_leader kho: skip memoryless NUMA nodes when reserving scratch areas ...

Merge tag 'printk-for-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2026-02-11T22:36:47Z

Pull printk updates from Petr Mladek: - Check all mandatory callbacks when registering nbcon consoles - Fix some compiler warnings * tag 'printk-for-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: vsnprintf: drop __printf() attributes on binary printing functions printf: convert test_hashed into macro printk: nbcon: Check for device_{lock,unlock} callbacks

Merge branch 'for-6.20' into for-linus

2026-02-11T09:14:35Z

Merge tag 'bitmap-for-6.20' of https://github.com/norov/linux

2026-02-10T19:39:45Z

Pull bitmap updates from Yury Norov: - more rust helpers (Alice) - more bitops tests (Ryota) - FIND_NTH_BIT() uninitialized variable fix (Lee Yongjun) - random cleanups (Andy, H. Peter) * tag 'bitmap-for-6.20' of https://github.com/norov/linux: lib/tests: extend KUnit test for bitops with more cases bitops: Add more files to the MAINTAINERS lib/find_bit: fix uninitialized variable use in FIND_NTH_BIT lib/tests: add KUnit test for bitops rust: cpumask: add __rust_helper to helpers rust: bitops: add __rust_helper to helpers rust: bitmap: add __rust_helper to helpers linux/bitfield.h: replace __auto_type with auto

lib/tests: extend KUnit test for bitops with more cases

2026-02-08T23:47:29Z

Extend a KUnit test suite for the bitops API to cover more APIs from include/asm-generic/bitops/instrumented-atomic.h. - change_bit() - test_and_set_bit() - test_and_clear_bit() - test_and_change_bit() Verified on x86_64, i386, and arm64 architectures. Sample KUnit output: KTAP version 1 # Subtest: test_change_bit ok 1 BITOPS_4 ok 2 BITOPS_7 ok 3 BITOPS_11 ok 4 BITOPS_31 ok 5 BITOPS_88 # test_change_bit: pass:5 fail:0 skip:0 total:5 ok 2 test_change_bit KTAP version 1 # Subtest: test_test_and_set_bit_test_and_clear_bit ok 1 BITOPS_4 ok 2 BITOPS_7 ok 3 BITOPS_11 ok 4 BITOPS_31 ok 5 BITOPS_88 # test_test_and_set_bit_test_and_clear_bit: pass:5 fail:0 skip:0 total:5 ok 3 test_test_and_set_bit_test_and_clear_bit KTAP version 1 # Subtest: test_test_and_change_bit ok 1 BITOPS_4 ok 2 BITOPS_7 ok 3 BITOPS_11 ok 4 BITOPS_31 ok 5 BITOPS_88 # test_test_and_change_bit: pass:5 fail:0 skip:0 total:5 ok 4 test_test_and_change_bit Signed-off-by: Ryota Sakamoto Signed-off-by: Yury Norov

lib/tests: add KUnit test for bitops

2026-02-08T23:47:29Z

Add a KUnit test suite for the bitops API. The existing 'lib/test_bitops.c' is preserved as-is because it contains ad-hoc micro-benchmarks 'test_fns' and is intended to ensure no compiler warnings from C=1 sparse checker or -Wextra compilations. Introduce 'lib/tests/bitops_kunit.c' for functional regression testing. It ports the test logic and data patterns from 'lib/test_bitops.c' to KUnit, verifying correct behavior across various input patterns and architecture-specific edge cases using isolated stack-allocated bitmaps. The following test logic has been ported from test_bitops_startup() in lib/test_bitops.c: - set_bit() / clear_bit() / find_first_bit() validation -> test_set_bit_clear_bit() - get_count_order() validation -> test_get_count_order() - get_count_order_long() validation -> test_get_count_order_long() Also improve the find_first_bit() test to check the full bitmap length (BITOPS_LENGTH) instead of omitting the last bit, ensuring the bitmap is completely empty after cleanup. Verified on x86_64, i386, and arm64 architectures. Sample KUnit output: KTAP version 1 # Subtest: bitops # module: bitops_kunit 1..3 KTAP version 1 # Subtest: test_set_bit_clear_bit ok 1 BITOPS_4 ok 2 BITOPS_7 ok 3 BITOPS_11 ok 4 BITOPS_31 ok 5 BITOPS_88 # test_set_bit_clear_bit: pass:5 fail:0 skip:0 total:5 ok 1 test_set_bit_clear_bit KTAP version 1 # Subtest: test_get_count_order ok 1 0x00000003 ok 2 0x00000004 ok 3 0x00001fff ok 4 0x00002000 ok 5 0x50000000 ok 6 0x80000000 ok 7 0x80003000 # test_get_count_order: pass:7 fail:0 skip:0 total:7 ok 2 test_get_count_order KTAP version 1 # Subtest: test_get_count_order_long ok 1 0x0000000300000000 ok 2 0x0000000400000000 ok 3 0x00001fff00000000 ok 4 0x0000200000000000 ok 5 0x5000000000000000 ok 6 0x8000000000000000 ok 7 0x8000300000000000 # test_get_count_order_long: pass:7 fail:0 skip:0 total:7 ok 3 test_get_count_order_long [Yury: trim Kconfig help message] CC: Jesse Brandeburg CC: Wei Yang Signed-off-by: Ryota Sakamoto Signed-off-by: Yury Norov

tests/liveupdate: add in-kernel liveupdate test

2026-02-08T08:13:33Z

Introduce an in-kernel test module to validate the core logic of the Live Update Orchestrator's File-Lifecycle-Bound feature. This provides a low-level, controlled environment to test FLB registration and callback invocation without requiring userspace interaction or actual kexec reboots. The test is enabled by the CONFIG_LIVEUPDATE_TEST Kconfig option. Link: https://lkml.kernel.org/r/20251218155752.3045808-6-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin Cc: Alexander Graf Cc: David Gow Cc: David Matlack Cc: David Rientjes Cc: Jonathan Corbet Cc: Kees Cook Cc: Mike Rapoport Cc: Petr Mladek Cc: Pratyush Yadav Cc: Samiullah Khawaja Cc: Tamir Duberstein Signed-off-by: Andrew Morton