lib: Move KUnit tests into tests/ subdirectory

Following from the recent KUnit file naming discussion[1], move all
KUnit tests in lib/ into lib/tests/.

Link: https://lore.kernel.org/lkml/[e-mail]/ [1]
Acked-by: Steven Rostedt (Google) <[e-mail]>
Acked-by: Jakub Kicinski <[e-mail]>
Acked-by: Masami Hiramatsu (Google) <[e-mail]>
Reviewed-by: David Gow <[e-mail]>
Acked-by: Vlastimil Babka <[e-mail]>
Reviewed-by: Rae Moar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Kees Cook <[e-mail]>

MAINTAINERS

···
 F:	lib/bitmap-str.c
 F:	lib/bitmap.c
 F:	lib/cpumask.c
-F:	lib/cpumask_kunit.c
 F:	lib/find_bit.c
 F:	lib/find_bit_benchmark.c
 F:	lib/test_bitmap.c
+F:	lib/tests/cpumask_kunit.c
 F:	tools/include/linux/bitfield.h
 F:	tools/include/linux/bitmap.h
 F:	tools/include/linux/bits.h
···
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
 F:	include/linux/fortify-string.h
-F:	lib/fortify_kunit.c
-F:	lib/memcpy_kunit.c
 F:	lib/test_fortify/*
+F:	lib/tests/fortify_kunit.c
+F:	lib/tests/memcpy_kunit.c
+F:	scripts/test_fortify.sh
 K:	\bunsafe_memcpy\b
 K:	\b__NO_FORTIFY\b
 
···
 F:	include/linux/string_choices.h
 F:	include/linux/string_helpers.h
 F:	lib/string.c
-F:	lib/string_kunit.c
 F:	lib/string_helpers.c
-F:	lib/string_helpers_kunit.c
+F:	lib/tests/string_helpers_kunit.c
+F:	lib/tests/string_kunit.c
 F:	scripts/coccinelle/api/string_choices.cocci
 
 GENERIC UIO DRIVER FOR PCI DEVICES
···
 F:	include/asm-generic/kprobes.h
 F:	include/linux/kprobes.h
 F:	kernel/kprobes.c
-F:	lib/test_kprobes.c
+F:	lib/tests/test_kprobes.c
 F:	samples/kprobes
 
 KS0108 LCD CONTROLLER DRIVER
···
 R:	Matti Vaittinen <[e-mail]>
 F:	include/linux/linear_range.h
 F:	lib/linear_ranges.c
-F:	lib/test_linear_ranges.c
+F:	lib/tests/test_linear_ranges.c
 
 LINUX FOR POWER MACINTOSH
 L:	[e-mail]
···
 L:	[e-mail]
 L:	[e-mail]
 S:	Maintained
-F:	lib/list-test.c
+F:	lib/tests/list-test.c
 
 LITEX PLATFORM
 M:	Karol Gugala <[e-mail]>
···
 S:	Maintained
 F:	include/linux/siphash.h
 F:	lib/siphash.c
-F:	lib/siphash_kunit.c
+F:	lib/tests/siphash_kunit.c
 
 SIS 190 ETHERNET DRIVER
 M:	Francois Romieu <[e-mail]>

lib/Makefile

···
 	 percpu-refcount.o rhashtable.o base64.o \
 	 once.o refcount.o rcuref.o usercopy.o errseq.o bucket_locks.o \
 	 generic-radix-tree.o bitmap-str.o
-obj-$(CONFIG_STRING_KUNIT_TEST) += string_kunit.o
 obj-y += string_helpers.o
-obj-$(CONFIG_STRING_HELPERS_KUNIT_TEST) += string_helpers_kunit.o
 obj-y += hexdump.o
 obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o
 obj-y += kstrtox.o
···
 obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
 obj-$(CONFIG_TEST_BITOPS) += test_bitops.o
 CFLAGS_test_bitops.o += -Werror
-obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o
 obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
-obj-$(CONFIG_TEST_IOV_ITER) += kunit_iov_iter.o
-obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o
 obj-$(CONFIG_TEST_IDA) += test_ida.o
 obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
 CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
 CFLAGS_test_ubsan.o += $(call cc-disable-warning, unused-but-set-variable)
 UBSAN_SANITIZE_test_ubsan.o := y
 obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
-obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
 obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o
 obj-$(CONFIG_TEST_LKM) += test_module.o
 obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o
 obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o
-obj-$(CONFIG_TEST_SORT) += test_sort.o
 obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o
 obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o
 obj-$(CONFIG_TEST_DYNAMIC_DEBUG) += test_dynamic_debug.o
···
 obj-$(CONFIG_TEST_MAPLE_TREE) += test_maple_tree.o
 obj-$(CONFIG_TEST_PARMAN) += test_parman.o
 obj-$(CONFIG_TEST_KMOD) += test_kmod.o
-obj-$(CONFIG_TEST_RUNTIME) += tests/
 obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
 obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
 obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o
···
 obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o
 obj-$(CONFIG_TEST_HMM) += test_hmm.o
 obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
-obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
 obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o
-CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE)
-obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o
 obj-$(CONFIG_TEST_OBJPOOL) += test_objpool.o
 
 obj-$(CONFIG_TEST_FPU) += test_fpu.o
···
 obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
 CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
 
-obj-y += math/ crypto/
+obj-y += math/ crypto/ tests/
 
 obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
···
 
 # pldmfw library
 obj-$(CONFIG_PLDMFW) += pldmfw/
-
-# KUnit tests
-CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
-obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
-obj-$(CONFIG_CHECKSUM_KUNIT) += checksum_kunit.o
-obj-$(CONFIG_UTIL_MACROS_KUNIT) += util_macros_kunit.o
-obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
-obj-$(CONFIG_HASHTABLE_KUNIT_TEST) += hashtable_test.o
-obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
-obj-$(CONFIG_BITS_TEST) += test_bits.o
-obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
-obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
-obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o
-obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o
-CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare)
-obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o
-CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable)
-obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o
-CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced)
-CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-overread)
-CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-truncation)
-CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN)
-obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o
-obj-$(CONFIG_CRC_KUNIT_TEST) += crc_kunit.o
-obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o
-obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o
 
 obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o
 

lib/tests/Makefile

···
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for tests of kernel library functions.
+
+# KUnit tests
+CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
+obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
+obj-$(CONFIG_BITS_TEST) += test_bits.o
+obj-$(CONFIG_CHECKSUM_KUNIT) += checksum_kunit.o
+obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
+obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o
+obj-$(CONFIG_CRC_KUNIT_TEST) += crc_kunit.o
+CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced)
+CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-overread)
+CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-truncation)
+CFLAGS_fortify_kunit.o += $(DISABLE_STRUCTLEAK_PLUGIN)
+obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o
+CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE)
+obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o
+obj-$(CONFIG_HASHTABLE_KUNIT_TEST) += hashtable_test.o
+obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o
+obj-$(CONFIG_TEST_IOV_ITER) += kunit_iov_iter.o
+obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o
+obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
+obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
+obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
+obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
+obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o
+CFLAGS_overflow_kunit.o = $(call cc-disable-warning, tautological-constant-out-of-range-compare)
+obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o
+obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o
+obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
+obj-$(CONFIG_TEST_SORT) += test_sort.o
+CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable)
+obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o
+obj-$(CONFIG_STRING_KUNIT_TEST) += string_kunit.o
+obj-$(CONFIG_STRING_HELPERS_KUNIT_TEST) += string_helpers_kunit.o
+obj-$(CONFIG_USERCOPY_KUNIT_TEST) += usercopy_kunit.o
+obj-$(CONFIG_UTIL_MACROS_KUNIT) += util_macros_kunit.o
+
 obj-$(CONFIG_TEST_RUNTIME_MODULE)		+= module/