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b3a7bb71bf
Add KUnit tests for ffs()-family bit scanning functions: ffs(), __ffs(), fls(), __fls(), fls64(), __ffs64(), and ffz(). The tests validate mathematical relationships (e.g. ffs(x) == __ffs(x) + 1), and test zero values, power-of-2 patterns, maximum values, and sparse bit patterns. Build and run tested with everything I could reach with KUnit: $ ./tools/testing/kunit/kunit.py run --arch=x86_64 ffs $ ./tools/testing/kunit/kunit.py run --arch=i386 ffs $ ./tools/testing/kunit/kunit.py run --arch=arm64 --make_options "CROSS_COMPILE=aarch64-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=arm --make_options "CROSS_COMPILE=arm-linux-gnueabihf-" ffs $ ./tools/testing/kunit/kunit.py run --arch=powerpc ffs $ ./tools/testing/kunit/kunit.py run --arch=powerpc32 ffs $ ./tools/testing/kunit/kunit.py run --arch=powerpcle ffs $ ./tools/testing/kunit/kunit.py run --arch=riscv --make_options "CROSS_COMPILE=riscv64-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=riscv32 --make_options "CROSS_COMPILE=riscv64-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=s390 --make_options "CROSS_COMPILE=s390x-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=m68k ffs $ ./tools/testing/kunit/kunit.py run --arch=loongarch ffs $ ./tools/testing/kunit/kunit.py run --arch=mips --make_options "CROSS_COMPILE=mipsel-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=sparc --make_options "CROSS_COMPILE=sparc64-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=sparc64 --make_options "CROSS_COMPILE=sparc64-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=alpha --make_options "CROSS_COMPILE=alpha-linux-gnu-" ffs $ ./tools/testing/kunit/kunit.py run --arch=sh --make_options "CROSS_COMPILE=sh4-linux-gnu-" ffs Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20250804164417.1612371-1-kees@kernel.org Signed-off-by: Kees Cook <kees@kernel.org> |
History
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| .. | ||
| module | ||
| bitfield_kunit.c | ||
| blackhole_dev_kunit.c | ||
| checksum_kunit.c | ||
| cmdline_kunit.c | ||
| cpumask_kunit.c | ||
| ffs_kunit.c | ||
| fortify_kunit.c | ||
| hashtable_test.c | ||
| is_signed_type_kunit.c | ||
| kfifo_kunit.c | ||
| kunit_iov_iter.c | ||
| list-test.c | ||
| longest_symbol_kunit.c | ||
| Makefile | ||
| memcpy_kunit.c | ||
| overflow_kunit.c | ||
| printf_kunit.c | ||
| randstruct_kunit.c | ||
| scanf_kunit.c | ||
| seq_buf_kunit.c | ||
| siphash_kunit.c | ||
| slub_kunit.c | ||
| stackinit_kunit.c | ||
| string_helpers_kunit.c | ||
| string_kunit.c | ||
| test_bits.c | ||
| test_fprobe.c | ||
| test_hash.c | ||
| test_kprobes.c | ||
| test_linear_ranges.c | ||
| test_list_sort.c | ||
| test_ratelimit.c | ||
| test_sort.c | ||
| usercopy_kunit.c | ||
| util_macros_kunit.c | ||