[PATCH v2 0/3] bitmap: convert self-test to KUnit

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* [PATCH v2 0/3] bitmap: convert self-test to KUnit
@ 2025-12-22 13:39 Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 1/3] test_bitmap: extract benchmark module Tamir Duberstein
                   ` (2 more replies)
  0 siblings, 3 replies; 7+ messages in thread
From: Tamir Duberstein @ 2025-12-22 13:39 UTC (permalink / raw)
  To: David Gow, John Hubbard, Andrew Morton, Geert Uytterhoeven,
	Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
	Naveen N Rao, Yury Norov, Rasmus Villemoes, Shuah Khan, Kees Cook,
	Christophe Leroy
  Cc: Muhammad Usama Anjum, linux-kernel, linux-m68k, linuxppc-dev,
	linux-kselftest, Tamir Duberstein, Alexander Potapenko

This is the last remaining "Test Module" kselftest, the rest having been
converted to KUnit.

Relative to v1 this keeps benchmarks out of KUnit in light of Yury's
concerns:

On Sat, Feb 8, 2025 at 12:53 PM Yury Norov <yury.norov@gmail.com> wrote:
>
> [...]
>
> This is my evidence: sometimes people report performance or whatever
> issues on their systems, suspecting bitmaps guilty. I ask them to run
> the bitmap or find_bit test to narrow the problem. Sometimes I need to
> test a hardware I have no access to, and I have to (kindly!) ask
people
> to build a small test and run it. I don't want to ask them to rebuild
> the whole kernel, or even to build something else.
>
> https://lore.kernel.org/all/YuWk3titnOiQACzC@yury-laptop/

I tested this using:

$ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 bitmap

There was a previous attempt[2] to do this in July 2024. Please bear
with me as I try to understand and address the objections from that
time. I've spoken with Muhammad Usama Anjum, the author of that series,
and received their approval to "take over" this work. Here we go...

On 7/26/24 11:45 PM, John Hubbard wrote:
> 
> This changes the situation from "works for Linus' tab completion
> case", to "causes a tab completion problem"! :)
> 
> I think a tests/ subdir is how we eventually decided to do this [1],
> right?
> 
> So:
> 
>     lib/tests/bitmap_kunit.c
> 
> [1] https://lore.kernel.org/20240724201354.make.730-kees@kernel.org

This is true and unfortunate, but not trivial to fix because new
kallsyms tests were placed in lib/tests in commit 84b4a51fce4c
("selftests: add new kallsyms selftests")  *after* the KUnit filename
best practices were adopted.

I propose that the KUnit maintainers blaze this trail using
`string_kunit.c` which currently still lives in lib/ despite the KUnit
docs giving it as an example at lib/tests/.

On 7/27/24 12:24 AM, Shuah Khan wrote:
> 
> This change will take away the ability to run bitmap tests during
> boot on a non-kunit kernel.
> 
> Nack on this change. I wan to see all tests that are being removed
> from lib because they have been converted - also it doesn't make
> sense to convert some tests like this one that add the ability test
> during boot.

This point was also discussed in another thread[3] in which:

On 7/27/24 12:35 AM, Shuah Khan wrote:
> 
> Please make sure you aren't taking away the ability to run these tests during
> boot. 
>
> It doesn't make sense to convert every single test especially when it
> is intended to be run during boot without dependencies - not as a kunit test
> but a regression test during boot.
> 
> bitmap is one example - pay attention to the config help test - bitmap
> one clearly states it runs regression testing during boot. Any test that
> says that isn't a candidate for conversion.
> 
> I am going to nack any such conversions.

The crux of the argument seems to be that the config help text is taken
to describe the author's intent with the fragment "at boot". I think
this may be a case of confirmation bias: I see at least the following
KUnit tests with "at boot" in their help text:
- CPUMASK_KUNIT_TEST
- BITFIELD_KUNIT
- CHECKSUM_KUNIT
- UTIL_MACROS_KUNIT

It seems to me that the inference being made is that any test that runs
"at boot" is intended to be run by both developers and users, but I find
no evidence that bitmap in particular would ever provide additional
value when run by users.

There's further discussion about KUnit not being "ideal for cases where
people would want to check a subsystem on a running kernel", but I find
no evidence that bitmap in particular is actually testing the running
kernel; it is a unit test of the bitmap functions, which is also stated
in the config help text.

David Gow made many of the same points in his final reply[4], which was
never replied to.

Link: https://lore.kernel.org/all/20250207-printf-kunit-convert-v2-0-057b23860823@gmail.com/T/#u [0]
Link: https://lore.kernel.org/all/20250207-scanf-kunit-convert-v4-0-a23e2afaede8@gmail.com/T/#u [1]
Link: https://lore.kernel.org/all/20240726110658.2281070-1-usama.anjum@collabora.com/T/#u [2]
Link: https://lore.kernel.org/all/327831fb-47ab-4555-8f0b-19a8dbcaacd7@collabora.com/T/#u [3]
Link: https://lore.kernel.org/all/CABVgOSmMoPD3JfzVd4VTkzGL2fZCo8LfwzaVSzeFimPrhgLa5w@mail.gmail.com/ [4]

Thanks for your attention.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
Changes in v2:
- Rebase on v6.19-rc1, dropping the first patch.
- Extract benchmarks into new module and deduplicate
  `test_bitmap_{read,write}_perf`.
- Remove tc_err() and use KUnit assertions.
- Parameterize `test_bitmap_cut` and `test_bitmap_parse{,list}`.
- Drop KUnit boilerplate from BITMAP_KUNIT_TEST help text.
- Drop arch changes.
- Link to v1: https://lore.kernel.org/r/20250207-bitmap-kunit-convert-v1-0-c520675343b6@gmail.com

---
Tamir Duberstein (3):
      test_bitmap: extract benchmark module
      bitmap: convert self-test to KUnit
      bitmap: break kunit into test cases

 MAINTAINERS                           |   3 +-
 lib/Kconfig.debug                     |  16 +-
 lib/Makefile                          |   5 +-
 lib/bitmap_benchmark.c                |  89 +++++
 lib/{test_bitmap.c => bitmap_kunit.c} | 630 ++++++++++++++--------------------
 tools/testing/selftests/lib/Makefile  |   2 +-
 tools/testing/selftests/lib/bitmap.sh |   3 -
 tools/testing/selftests/lib/config    |   1 -
 8 files changed, 360 insertions(+), 389 deletions(-)
---
base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
change-id: 20250207-bitmap-kunit-convert-92d3147b2eee

Best regards,
--  
Tamir Duberstein <tamird@gmail.com>


^ permalink raw reply	[flat|nested] 7+ messages in thread

* [PATCH v2 1/3] test_bitmap: extract benchmark module
  2025-12-22 13:39 [PATCH v2 0/3] bitmap: convert self-test to KUnit Tamir Duberstein
@ 2025-12-22 13:39 ` Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 2/3] bitmap: convert self-test to KUnit Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 3/3] bitmap: break kunit into test cases Tamir Duberstein
  2 siblings, 0 replies; 7+ messages in thread
From: Tamir Duberstein @ 2025-12-22 13:39 UTC (permalink / raw)
  To: David Gow, John Hubbard, Andrew Morton, Geert Uytterhoeven,
	Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
	Naveen N Rao, Yury Norov, Rasmus Villemoes, Shuah Khan, Kees Cook,
	Christophe Leroy
  Cc: Muhammad Usama Anjum, linux-kernel, linux-m68k, linuxppc-dev,
	linux-kselftest, Tamir Duberstein, Alexander Potapenko

From: Tamir Duberstein <tamird@gmail.com>

Add CONFIG_BITMAP_BENCHMARK to build benchmarks separately from unit
tests. The new module is marked authored by the author of commit
991e5583647d ("lib/test_bitmap: add tests for bitmap_{read,write}()")
which added these benchmarks.

Extract duplicated code between `test_bitmap_{read,write}_perf`.

Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
 MAINTAINERS            |  1 +
 lib/Kconfig.debug      |  8 +++++
 lib/Makefile           |  1 +
 lib/bitmap_benchmark.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/test_bitmap.c      | 50 ----------------------------
 5 files changed, 99 insertions(+), 50 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 5b11839cba9d..4ddaef15b408 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4426,6 +4426,7 @@ F:	include/uapi/linux/bits.h
 F:	include/vdso/bits.h
 F:	lib/bitmap-str.c
 F:	lib/bitmap.c
+F:	lib/bitmap_benchmark.c
 F:	lib/cpumask.c
 F:	lib/find_bit.c
 F:	lib/find_bit_benchmark.c
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ba36939fda79..60434b31a940 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2492,6 +2492,14 @@ config FFS_KUNIT_TEST
 config TEST_KSTRTOX
 	tristate "Test kstrto*() family of functions at runtime"
 
+config BITMAP_BENCHMARK
+	tristate "Benchmark bitmap_*() family of functions"
+	help
+	  This builds the "bitmap_benchmark_test" module that measure bitmap_*()
+	  family of functions performance.
+
+	  If unsure, say N.
+
 config TEST_BITMAP
 	tristate "Test bitmap_*() family of functions at runtime"
 	help
diff --git a/lib/Makefile b/lib/Makefile
index aaf677cf4527..892cb3152b65 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -61,6 +61,7 @@ obj-y += string_helpers.o
 obj-y += hexdump.o
 obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o
 obj-y += kstrtox.o
+obj-$(CONFIG_BITMAP_BENCHMARK) += bitmap_benchmark.o
 obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o
 obj-$(CONFIG_FIND_BIT_BENCHMARK_RUST) += find_bit_benchmark_rust.o
 obj-$(CONFIG_TEST_BPF) += test_bpf.o
diff --git a/lib/bitmap_benchmark.c b/lib/bitmap_benchmark.c
new file mode 100644
index 000000000000..47f4cea4e831
--- /dev/null
+++ b/lib/bitmap_benchmark.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Benchmarks for bitmap API.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/bitmap.h>
+#include <linux/init.h>
+#include <linux/ktime.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+
+/*
+ * Test bitmap should be big enough to include the cases when start is not in
+ * the first word, and start+nbits lands in the following word.
+ */
+#define TEST_BIT_LEN (1000)
+
+typedef void (*bitmap_bench_fn)(unsigned long *bitmap, unsigned long i, unsigned long nbits);
+
+static void __init bench_bitmap(bitmap_bench_fn bench_fn, const char *name)
+{
+	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
+	unsigned int cnt, nbits, i;
+	ktime_t time;
+
+	bitmap_fill(bitmap, TEST_BIT_LEN);
+	time = ktime_get();
+	for (cnt = 0; cnt < 5; cnt++) {
+		for (nbits = 1; nbits <= BITS_PER_LONG; nbits++) {
+			for (i = 0; i < TEST_BIT_LEN; i++) {
+				if (i + nbits > TEST_BIT_LEN)
+					break;
+				bench_fn(bitmap, i, nbits);
+			}
+		}
+	}
+	time = ktime_get() - time;
+	pr_info("Time spent in %s:\t%llu\n", name, time);
+}
+
+#undef TEST_BIT_LEN
+
+static inline void bitmap_read_bench(unsigned long *bitmap, unsigned long i, unsigned long nbits)
+{
+	unsigned long val;
+	/*
+	 * Prevent the compiler from optimizing away the
+	 * bitmap_read() by using its value.
+	 */
+	WRITE_ONCE(val, bitmap_read(bitmap, i, nbits));
+}
+
+static void __init test_bitmap_read_perf(void)
+{
+	bench_bitmap(bitmap_read_bench, __func__);
+}
+
+static inline void bitmap_write_bench(unsigned long *bitmap, unsigned long i, unsigned long nbits)
+{
+	unsigned long val = 0xfeedface;
+
+	bitmap_write(bitmap, val, i, nbits);
+}
+
+static void __init test_bitmap_write_perf(void)
+{
+	bench_bitmap(bitmap_write_bench, __func__);
+}
+
+static int __init bitmap_benchmark_init(void)
+{
+	test_bitmap_read_perf();
+	test_bitmap_write_perf();
+
+	return 0;
+}
+module_init(bitmap_benchmark_init);
+
+static void __exit bitmap_benchmark_exit(void)
+{
+	pr_info("Unloaded\n");
+}
+module_exit(bitmap_benchmark_exit);
+
+MODULE_AUTHOR("Alexander Potapenko <glider@google.com>");
+MODULE_DESCRIPTION("Benchmarks for bitmap API");
+MODULE_LICENSE("GPL");
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index c83829ef557f..f728b6485c88 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -1372,54 +1372,6 @@ static void __init test_bitmap_read_write(void)
 		test_bitmap_write_helper(pattern[pi]);
 }
 
-static void __init test_bitmap_read_perf(void)
-{
-	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
-	unsigned int cnt, nbits, i;
-	unsigned long val;
-	ktime_t time;
-
-	bitmap_fill(bitmap, TEST_BIT_LEN);
-	time = ktime_get();
-	for (cnt = 0; cnt < 5; cnt++) {
-		for (nbits = 1; nbits <= BITS_PER_LONG; nbits++) {
-			for (i = 0; i < TEST_BIT_LEN; i++) {
-				if (i + nbits > TEST_BIT_LEN)
-					break;
-				/*
-				 * Prevent the compiler from optimizing away the
-				 * bitmap_read() by using its value.
-				 */
-				WRITE_ONCE(val, bitmap_read(bitmap, i, nbits));
-			}
-		}
-	}
-	time = ktime_get() - time;
-	pr_info("Time spent in %s:\t%llu\n", __func__, time);
-}
-
-static void __init test_bitmap_write_perf(void)
-{
-	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
-	unsigned int cnt, nbits, i;
-	unsigned long val = 0xfeedface;
-	ktime_t time;
-
-	bitmap_zero(bitmap, TEST_BIT_LEN);
-	time = ktime_get();
-	for (cnt = 0; cnt < 5; cnt++) {
-		for (nbits = 1; nbits <= BITS_PER_LONG; nbits++) {
-			for (i = 0; i < TEST_BIT_LEN; i++) {
-				if (i + nbits > TEST_BIT_LEN)
-					break;
-				bitmap_write(bitmap, val, i, nbits);
-			}
-		}
-	}
-	time = ktime_get() - time;
-	pr_info("Time spent in %s:\t%llu\n", __func__, time);
-}
-
 #undef TEST_BIT_LEN
 
 static void __init selftest(void)
@@ -1440,8 +1392,6 @@ static void __init selftest(void)
 	test_bitmap_print_buf();
 	test_bitmap_const_eval();
 	test_bitmap_read_write();
-	test_bitmap_read_perf();
-	test_bitmap_write_perf();
 
 	test_find_nth_bit();
 	test_for_each_set_bit();

-- 
2.52.0


^ permalink raw reply related	[flat|nested] 7+ messages in thread

* [PATCH v2 2/3] bitmap: convert self-test to KUnit
  2025-12-22 13:39 [PATCH v2 0/3] bitmap: convert self-test to KUnit Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 1/3] test_bitmap: extract benchmark module Tamir Duberstein
@ 2025-12-22 13:39 ` Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 3/3] bitmap: break kunit into test cases Tamir Duberstein
  2 siblings, 0 replies; 7+ messages in thread
From: Tamir Duberstein @ 2025-12-22 13:39 UTC (permalink / raw)
  To: David Gow, John Hubbard, Andrew Morton, Geert Uytterhoeven,
	Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
	Naveen N Rao, Yury Norov, Rasmus Villemoes, Shuah Khan, Kees Cook,
	Christophe Leroy
  Cc: Muhammad Usama Anjum, linux-kernel, linux-m68k, linuxppc-dev,
	linux-kselftest, Tamir Duberstein

From: Tamir Duberstein <tamird@gmail.com>

Convert the bitmap() self-test to a KUnit test.

In the interest of keeping the patch reasonably-sized this doesn't
refactor the tests into proper parameterized tests - it's all one big
test case.

Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
 MAINTAINERS                           |   2 +-
 lib/Kconfig.debug                     |  16 +-
 lib/Makefile                          |   4 +-
 lib/{test_bitmap.c => bitmap_kunit.c} | 314 +++++++++++++---------------------
 tools/testing/selftests/lib/Makefile  |   2 +-
 tools/testing/selftests/lib/bitmap.sh |   3 -
 tools/testing/selftests/lib/config    |   1 -
 7 files changed, 135 insertions(+), 207 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 4ddaef15b408..bb5269ff2bcd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4430,7 +4430,7 @@ F:	lib/bitmap_benchmark.c
 F:	lib/cpumask.c
 F:	lib/find_bit.c
 F:	lib/find_bit_benchmark.c
-F:	lib/test_bitmap.c
+F:	lib/tests/bitmap_kunit.c
 F:	lib/tests/cpumask_kunit.c
 F:	tools/include/linux/bitfield.h
 F:	tools/include/linux/bitmap.h
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 60434b31a940..e7a4991e5395 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2438,6 +2438,15 @@ config ASYNC_RAID6_TEST
 config TEST_HEXDUMP
 	tristate "Test functions located in the hexdump module at runtime"
 
+config BITMAP_KUNIT_TEST
+	tristate "KUnit test bitmap_*() family of functions at runtime" if !KUNIT_ALL_TESTS
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  Enable this option to test the bitmap functions at runtime.
+
+	  If unsure, say N.
+
 config PRINTF_KUNIT_TEST
 	tristate "KUnit test printf() family of functions at runtime" if !KUNIT_ALL_TESTS
 	depends on KUNIT
@@ -2500,13 +2509,6 @@ config BITMAP_BENCHMARK
 
 	  If unsure, say N.
 
-config TEST_BITMAP
-	tristate "Test bitmap_*() family of functions at runtime"
-	help
-	  Enable this option to test the bitmap functions at boot.
-
-	  If unsure, say N.
-
 config TEST_UUID
 	tristate "Test functions located in the uuid module at runtime"
 
diff --git a/lib/Makefile b/lib/Makefile
index 892cb3152b65..683084afb793 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -84,10 +84,10 @@ 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-$(CONFIG_TEST_BITMAP) += test_bitmap.o
+obj-$(CONFIG_BITMAP_KUNIT_TEST) += bitmap_kunit.o
 ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_KASAN),yy)
 # FIXME: Clang breaks test_bitmap_const_eval when KASAN and GCOV are enabled
-GCOV_PROFILE_test_bitmap.o := n
+GCOV_PROFILE_bitmap_kunit.o := n
 endif
 
 obj-$(CONFIG_TEST_UUID) += test_uuid.o
diff --git a/lib/test_bitmap.c b/lib/bitmap_kunit.c
similarity index 83%
rename from lib/test_bitmap.c
rename to lib/bitmap_kunit.c
index f728b6485c88..3a71e2039c1f 100644
--- a/lib/test_bitmap.c
+++ b/lib/bitmap_kunit.c
@@ -3,10 +3,8 @@
  * Test cases for bitmap API.
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
+#include <kunit/test.h>
 #include <linux/bitmap.h>
-#include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/printk.h>
@@ -14,16 +12,17 @@
 #include <linux/string.h>
 #include <linux/uaccess.h>
 
-#include "../tools/testing/selftests/kselftest_module.h"
-
 #define EXP1_IN_BITS	(sizeof(exp1) * 8)
 
-KSTM_MODULE_GLOBALS();
+static char pbl_buffer[PAGE_SIZE];
+static char print_buf[PAGE_SIZE * 2];
+
+static struct kunit *kunittest;
 
-static char pbl_buffer[PAGE_SIZE] __initdata;
-static char print_buf[PAGE_SIZE * 2] __initdata;
+#define tc_err(fmt, ...) \
+	KUNIT_FAIL(kunittest, fmt, ##__VA_ARGS__)
 
-static const unsigned long exp1[] __initconst = {
+static const unsigned long exp1[] = {
 	BITMAP_FROM_U64(1),
 	BITMAP_FROM_U64(2),
 	BITMAP_FROM_U64(0x0000ffff),
@@ -41,130 +40,63 @@ static const unsigned long exp1[] __initconst = {
 	BITMAP_FROM_U64(0x80000000),
 };
 
-static const unsigned long exp2[] __initconst = {
+static const unsigned long exp2[] = {
 	BITMAP_FROM_U64(0x3333333311111111ULL),
 	BITMAP_FROM_U64(0xffffffff77777777ULL),
 };
 
 /* Fibonacci sequence */
-static const unsigned long exp2_to_exp3_mask[] __initconst = {
+static const unsigned long exp2_to_exp3_mask[] = {
 	BITMAP_FROM_U64(0x008000020020212eULL),
 };
 /* exp3_0_1 = (exp2[0] & ~exp2_to_exp3_mask) | (exp2[1] & exp2_to_exp3_mask) */
-static const unsigned long exp3_0_1[] __initconst = {
+static const unsigned long exp3_0_1[] = {
 	BITMAP_FROM_U64(0x33b3333311313137ULL),
 };
 /* exp3_1_0 = (exp2[1] & ~exp2_to_exp3_mask) | (exp2[0] & exp2_to_exp3_mask) */
-static const unsigned long exp3_1_0[] __initconst = {
+static const unsigned long exp3_1_0[] = {
 	BITMAP_FROM_U64(0xff7fffff77575751ULL),
 };
 
-static bool __init
-__check_eq_ulong(const char *srcfile, unsigned int line,
-		 const unsigned long exp_ulong, unsigned long x)
-{
-	if (exp_ulong != x) {
-		pr_err("[%s:%u] expected %lu, got %lu\n",
-			srcfile, line, exp_ulong, x);
-		return false;
-	}
-	return true;
-}
-
-static bool __init
-__check_eq_bitmap(const char *srcfile, unsigned int line,
-		  const unsigned long *exp_bmap, const unsigned long *bmap,
-		  unsigned int nbits)
-{
-	if (!bitmap_equal(exp_bmap, bmap, nbits)) {
-		pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
-			srcfile, line,
-			nbits, exp_bmap, nbits, bmap);
-		return false;
-	}
-	return true;
-}
-
-static bool __init
-__check_eq_pbl(const char *srcfile, unsigned int line,
-	       const char *expected_pbl,
-	       const unsigned long *bitmap, unsigned int nbits)
-{
-	snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);
-	if (strcmp(expected_pbl, pbl_buffer)) {
-		pr_warn("[%s:%u] expected \"%s\", got \"%s\"\n",
-			srcfile, line,
-			expected_pbl, pbl_buffer);
-		return false;
-	}
-	return true;
-}
-
-static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
-				    const unsigned int offset,
-				    const unsigned int size,
-				    const unsigned char *const clump_exp,
-				    const unsigned long *const clump)
-{
-	unsigned long exp;
-
-	if (offset >= size) {
-		pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
-			srcfile, line, size, offset);
-		return false;
-	}
-
-	exp = clump_exp[offset / 8];
-	if (!exp) {
-		pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
-			srcfile, line, offset);
-		return false;
-	}
-
-	if (*clump != exp) {
-		pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
-			srcfile, line, exp, *clump);
-		return false;
-	}
-
-	return true;
-}
-
-static bool __init
-__check_eq_str(const char *srcfile, unsigned int line,
-		const char *exp_str, const char *str,
-		unsigned int len)
-{
-	bool eq;
-
-	eq = strncmp(exp_str, str, len) == 0;
-	if (!eq)
-		pr_err("[%s:%u] expected %s, got %s\n", srcfile, line, exp_str, str);
-
-	return eq;
-}
-
-#define __expect_eq(suffix, ...)					\
-	({								\
-		int result = 0;						\
-		total_tests++;						\
-		if (!__check_eq_ ## suffix(__FILE__, __LINE__,		\
-					   ##__VA_ARGS__)) {		\
-			failed_tests++;					\
-			result = 1;					\
+#define expect_eq_ulong(exp_ulong, x)	KUNIT_EXPECT_EQ(kunittest, exp_ulong, x)
+
+#define expect_eq_bitmap(exp_bmap, bmap, nbits)							\
+	KUNIT_EXPECT_TRUE_MSG(kunittest, bitmap_equal(exp_bmap, bmap, nbits),			\
+			      "bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"",	\
+					nbits, exp_bmap, nbits, bmap)
+
+#define expect_eq_pbl(expected_pbl, bitmap, nbits) do {						\
+		{										\
+			snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);	\
+			KUNIT_EXPECT_STREQ(kunittest, expected_pbl, pbl_buffer);		\
+		}										\
+	} while (0)
+
+#define expect_eq_clump8(offset, size, clump_exp, clump) do {				\
+		{									\
+			unsigned long exp;						\
+											\
+			KUNIT_EXPECT_LT_MSG(kunittest, offset, size,			\
+					    "bit offset for clump out-of-bounds");	\
+											\
+			exp = clump_exp[offset / 8];					\
+			KUNIT_EXPECT_NE_MSG(kunittest, exp, 0,				\
+					    "bit offset %u for zero clump", offset);	\
+											\
+			KUNIT_EXPECT_EQ(kunittest, *clump, exp);			\
+		}									\
+	} while (0)
+
+#define expect_eq_str(exp_str, str, len)				\
+	{								\
+		if (strncmp(exp_str, str, len) != 0) {			\
+			tc_err("expected %s, got %s", exp_str, str);	\
 		}							\
-		result;							\
-	})
+	}
 
-#define expect_eq_ulong(...)		__expect_eq(ulong, ##__VA_ARGS__)
 #define expect_eq_uint(x, y)		expect_eq_ulong((unsigned int)(x), (unsigned int)(y))
-#define expect_eq_bitmap(...)		__expect_eq(bitmap, ##__VA_ARGS__)
-#define expect_eq_pbl(...)		__expect_eq(pbl, ##__VA_ARGS__)
-#define expect_eq_u32_array(...)	__expect_eq(u32_array, ##__VA_ARGS__)
-#define expect_eq_clump8(...)		__expect_eq(clump8, ##__VA_ARGS__)
-#define expect_eq_str(...)		__expect_eq(str, ##__VA_ARGS__)
 
-static void __init test_zero_clear(void)
+static void test_zero_clear(void)
 {
 	DECLARE_BITMAP(bmap, 1024);
 
@@ -193,7 +125,7 @@ static void __init test_zero_clear(void)
 	expect_eq_pbl("", bmap, 1024);
 }
 
-static void __init test_find_nth_bit(void)
+static void test_find_nth_bit(void)
 {
 	unsigned long b, bit, cnt = 0;
 	DECLARE_BITMAP(bmap, 64 * 3);
@@ -234,7 +166,7 @@ static void __init test_find_nth_bit(void)
 	}
 }
 
-static void __init test_fill_set(void)
+static void test_fill_set(void)
 {
 	DECLARE_BITMAP(bmap, 1024);
 
@@ -263,7 +195,7 @@ static void __init test_fill_set(void)
 	expect_eq_pbl("0-1023", bmap, 1024);
 }
 
-static void __init test_copy(void)
+static void test_copy(void)
 {
 	DECLARE_BITMAP(bmap1, 1024);
 	DECLARE_BITMAP(bmap2, 1024);
@@ -302,7 +234,7 @@ static void __init test_copy(void)
 	expect_eq_pbl("0-108,128-1023", bmap2, 1024);
 }
 
-static void __init test_bitmap_region(void)
+static void test_bitmap_region(void)
 {
 	int pos, order;
 
@@ -327,7 +259,7 @@ static void __init test_bitmap_region(void)
 
 #define EXP2_IN_BITS	(sizeof(exp2) * 8)
 
-static void __init test_replace(void)
+static void test_replace(void)
 {
 	unsigned int nbits = 64;
 	unsigned int nlongs = DIV_ROUND_UP(nbits, BITS_PER_LONG);
@@ -352,23 +284,23 @@ static void __init test_replace(void)
 	expect_eq_bitmap(bmap, exp3_1_0, nbits);
 }
 
-static const unsigned long sg_mask[] __initconst = {
+static const unsigned long sg_mask[] = {
 	BITMAP_FROM_U64(0x000000000000035aULL),
 };
 
-static const unsigned long sg_src[] __initconst = {
+static const unsigned long sg_src[] = {
 	BITMAP_FROM_U64(0x0000000000000667ULL),
 };
 
-static const unsigned long sg_gather_exp[] __initconst = {
+static const unsigned long sg_gather_exp[] = {
 	BITMAP_FROM_U64(0x0000000000000029ULL),
 };
 
-static const unsigned long sg_scatter_exp[] __initconst = {
+static const unsigned long sg_scatter_exp[] = {
 	BITMAP_FROM_U64(0x000000000000021aULL),
 };
 
-static void __init test_bitmap_sg(void)
+static void test_bitmap_sg(void)
 {
 	unsigned int nbits = 64;
 	DECLARE_BITMAP(bmap_gather, 100);
@@ -404,7 +336,7 @@ struct test_bitmap_parselist{
 	const int flags;
 };
 
-static const struct test_bitmap_parselist parselist_tests[] __initconst = {
+static const struct test_bitmap_parselist parselist_tests[] = {
 #define step (sizeof(u64) / sizeof(unsigned long))
 
 	{0, "0",			&exp1[0], 8, 0},
@@ -489,7 +421,7 @@ static const struct test_bitmap_parselist parselist_tests[] __initconst = {
 
 };
 
-static void __init test_bitmap_parselist(void)
+static void test_bitmap_parselist(void)
 {
 	int i;
 	int err;
@@ -504,30 +436,28 @@ static void __init test_bitmap_parselist(void)
 		time = ktime_get() - time;
 
 		if (err != ptest.errno) {
-			pr_err("parselist: %d: input is %s, errno is %d, expected %d\n",
+			tc_err("parselist: %d: input is %s, errno is %d, expected %d",
 					i, ptest.in, err, ptest.errno);
-			failed_tests++;
 			continue;
 		}
 
 		if (!err && ptest.expected
 			 && !__bitmap_equal(bmap, ptest.expected, ptest.nbits)) {
-			pr_err("parselist: %d: input is %s, result is 0x%lx, expected 0x%lx\n",
+			tc_err("parselist: %d: input is %s, result is 0x%lx, expected 0x%lx",
 					i, ptest.in, bmap[0],
 					*ptest.expected);
-			failed_tests++;
 			continue;
 		}
 
 		if (ptest.flags & PARSE_TIME)
-			pr_info("parselist: %d: input is '%s' OK, Time: %llu\n",
+			kunit_info(kunittest, "parselist: %d: input is '%s' OK, Time: %llu",
 					i, ptest.in, time);
 
 #undef ptest
 	}
 }
 
-static void __init test_bitmap_printlist(void)
+static void test_bitmap_printlist(void)
 {
 	unsigned long *bmap = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
@@ -548,37 +478,35 @@ static void __init test_bitmap_printlist(void)
 	time = ktime_get() - time;
 
 	if (ret != slen + 1) {
-		pr_err("bitmap_print_to_pagebuf: result is %d, expected %d\n", ret, slen);
-		failed_tests++;
+		tc_err("bitmap_print_to_pagebuf: result is %d, expected %d", ret, slen);
 		goto out;
 	}
 
 	if (strncmp(buf, expected, slen)) {
-		pr_err("bitmap_print_to_pagebuf: result is %s, expected %s\n", buf, expected);
-		failed_tests++;
+		tc_err("bitmap_print_to_pagebuf: result is %s, expected %s", buf, expected);
 		goto out;
 	}
 
-	pr_info("bitmap_print_to_pagebuf: input is '%s', Time: %llu\n", buf, time);
+	kunit_info(kunittest, "bitmap_print_to_pagebuf: input is '%s', Time: %llu", buf, time);
 out:
 	kfree(buf);
 	kfree(bmap);
 }
 
-static const unsigned long parse_test[] __initconst = {
+static const unsigned long parse_test[] = {
 	BITMAP_FROM_U64(0),
 	BITMAP_FROM_U64(1),
 	BITMAP_FROM_U64(0xdeadbeef),
 	BITMAP_FROM_U64(0x100000000ULL),
 };
 
-static const unsigned long parse_test2[] __initconst = {
+static const unsigned long parse_test2[] = {
 	BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0xdeadbeef),
 	BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0xbaadf00ddeadbeef),
 	BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0x0badf00ddeadbeef),
 };
 
-static const struct test_bitmap_parselist parse_tests[] __initconst = {
+static const struct test_bitmap_parselist parse_tests[] = {
 	{0, "",				&parse_test[0 * step], 32, 0},
 	{0, " ",			&parse_test[0 * step], 32, 0},
 	{0, "0",			&parse_test[0 * step], 32, 0},
@@ -605,7 +533,7 @@ static const struct test_bitmap_parselist parse_tests[] __initconst = {
 #undef step
 };
 
-static void __init test_bitmap_parse(void)
+static void test_bitmap_parse(void)
 {
 	int i;
 	int err;
@@ -621,28 +549,26 @@ static void __init test_bitmap_parse(void)
 		time = ktime_get() - time;
 
 		if (err != test.errno) {
-			pr_err("parse: %d: input is %s, errno is %d, expected %d\n",
+			tc_err("parse: %d: input is %s, errno is %d, expected %d",
 					i, test.in, err, test.errno);
-			failed_tests++;
 			continue;
 		}
 
 		if (!err && test.expected
 			 && !__bitmap_equal(bmap, test.expected, test.nbits)) {
-			pr_err("parse: %d: input is %s, result is 0x%lx, expected 0x%lx\n",
+			tc_err("parse: %d: input is %s, result is 0x%lx, expected 0x%lx",
 					i, test.in, bmap[0],
 					*test.expected);
-			failed_tests++;
 			continue;
 		}
 
 		if (test.flags & PARSE_TIME)
-			pr_info("parse: %d: input is '%s' OK, Time: %llu\n",
+			kunit_info(kunittest, "parse: %d: input is '%s' OK, Time: %llu",
 					i, test.in, time);
 	}
 }
 
-static void __init test_bitmap_arr32(void)
+static void test_bitmap_arr32(void)
 {
 	unsigned int nbits, next_bit;
 	u32 arr[EXP1_IN_BITS / 32];
@@ -658,10 +584,8 @@ static void __init test_bitmap_arr32(void)
 		next_bit = find_next_bit(bmap2,
 				round_up(nbits, BITS_PER_LONG), nbits);
 		if (next_bit < round_up(nbits, BITS_PER_LONG)) {
-			pr_err("bitmap_copy_arr32(nbits == %d:"
-				" tail is not safely cleared: %d\n",
+			tc_err("bitmap_copy_arr32(nbits == %d: tail is not safely cleared: %d",
 				nbits, next_bit);
-			failed_tests++;
 		}
 
 		if (nbits < EXP1_IN_BITS - 32)
@@ -670,7 +594,7 @@ static void __init test_bitmap_arr32(void)
 	}
 }
 
-static void __init test_bitmap_arr64(void)
+static void test_bitmap_arr64(void)
 {
 	unsigned int nbits, next_bit;
 	u64 arr[EXP1_IN_BITS / 64];
@@ -686,17 +610,15 @@ static void __init test_bitmap_arr64(void)
 
 		next_bit = find_next_bit(bmap2, round_up(nbits, BITS_PER_LONG), nbits);
 		if (next_bit < round_up(nbits, BITS_PER_LONG)) {
-			pr_err("bitmap_copy_arr64(nbits == %d:"
-				" tail is not safely cleared: %d\n", nbits, next_bit);
-			failed_tests++;
+			tc_err("bitmap_copy_arr64(nbits == %d: tail is not safely cleared: %d",
+				nbits, next_bit);
 		}
 
 		if ((nbits % 64) &&
 		    (arr[(nbits - 1) / 64] & ~GENMASK_ULL((nbits - 1) % 64, 0))) {
-			pr_err("bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)\n",
+			tc_err("bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)",
 			       nbits, arr[(nbits - 1) / 64],
 			       GENMASK_ULL((nbits - 1) % 64, 0));
-			failed_tests++;
 		}
 
 		if (nbits < EXP1_IN_BITS - 64)
@@ -704,7 +626,7 @@ static void __init test_bitmap_arr64(void)
 	}
 }
 
-static void noinline __init test_mem_optimisations(void)
+static noinline void test_mem_optimisations(void)
 {
 	DECLARE_BITMAP(bmap1, 1024);
 	DECLARE_BITMAP(bmap2, 1024);
@@ -718,30 +640,25 @@ static void noinline __init test_mem_optimisations(void)
 			bitmap_set(bmap1, start, nbits);
 			__bitmap_set(bmap2, start, nbits);
 			if (!bitmap_equal(bmap1, bmap2, 1024)) {
-				printk("set not equal %d %d\n", start, nbits);
-				failed_tests++;
+				tc_err("set not equal %d %d", start, nbits);
 			}
 			if (!__bitmap_equal(bmap1, bmap2, 1024)) {
-				printk("set not __equal %d %d\n", start, nbits);
-				failed_tests++;
+				tc_err("set not __equal %d %d", start, nbits);
 			}
 
 			bitmap_clear(bmap1, start, nbits);
 			__bitmap_clear(bmap2, start, nbits);
 			if (!bitmap_equal(bmap1, bmap2, 1024)) {
-				printk("clear not equal %d %d\n", start, nbits);
-				failed_tests++;
+				tc_err("clear not equal %d %d", start, nbits);
 			}
 			if (!__bitmap_equal(bmap1, bmap2, 1024)) {
-				printk("clear not __equal %d %d\n", start,
-									nbits);
-				failed_tests++;
+				tc_err("clear not __equal %d %d", start, nbits);
 			}
 		}
 	}
 }
 
-static const unsigned char clump_exp[] __initconst = {
+static const unsigned char clump_exp[] = {
 	0x01,	/* 1 bit set */
 	0x02,	/* non-edge 1 bit set */
 	0x00,	/* zero bits set */
@@ -752,7 +669,7 @@ static const unsigned char clump_exp[] __initconst = {
 	0x05,	/* non-adjacent 2 bits set */
 };
 
-static void __init test_for_each_set_clump8(void)
+static void test_for_each_set_clump8(void)
 {
 #define CLUMP_EXP_NUMBITS 64
 	DECLARE_BITMAP(bits, CLUMP_EXP_NUMBITS);
@@ -774,7 +691,7 @@ static void __init test_for_each_set_clump8(void)
 		expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
 }
 
-static void __init test_for_each_set_bit_wrap(void)
+static void test_for_each_set_bit_wrap(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -799,7 +716,7 @@ static void __init test_for_each_set_bit_wrap(void)
 	}
 }
 
-static void __init test_for_each_set_bit(void)
+static void test_for_each_set_bit(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -821,7 +738,7 @@ static void __init test_for_each_set_bit(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void __init test_for_each_set_bit_from(void)
+static void test_for_each_set_bit_from(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -851,7 +768,7 @@ static void __init test_for_each_set_bit_from(void)
 	}
 }
 
-static void __init test_for_each_clear_bit(void)
+static void test_for_each_clear_bit(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -873,7 +790,7 @@ static void __init test_for_each_clear_bit(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void __init test_for_each_clear_bit_from(void)
+static void test_for_each_clear_bit_from(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -903,7 +820,7 @@ static void __init test_for_each_clear_bit_from(void)
 	}
 }
 
-static void __init test_for_each_set_bitrange(void)
+static void test_for_each_set_bitrange(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -925,7 +842,7 @@ static void __init test_for_each_set_bitrange(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void __init test_for_each_clear_bitrange(void)
+static void test_for_each_clear_bitrange(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -947,7 +864,7 @@ static void __init test_for_each_clear_bitrange(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void __init test_for_each_set_bitrange_from(void)
+static void test_for_each_set_bitrange_from(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -977,7 +894,7 @@ static void __init test_for_each_set_bitrange_from(void)
 	}
 }
 
-static void __init test_for_each_clear_bitrange_from(void)
+static void test_for_each_clear_bitrange_from(void)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -1048,7 +965,7 @@ static struct test_bitmap_cut test_cut[] = {
 	},
 };
 
-static void __init test_bitmap_cut(void)
+static void test_bitmap_cut(void)
 {
 	unsigned long b[5], *in = &b[1], *out = &b[0];	/* Partial overlap */
 	int i;
@@ -1071,14 +988,14 @@ struct test_bitmap_print {
 	const char *list;
 };
 
-static const unsigned long small_bitmap[] __initconst = {
+static const unsigned long small_bitmap[] = {
 	BITMAP_FROM_U64(0x3333333311111111ULL),
 };
 
-static const char small_mask[] __initconst = "33333333,11111111\n";
-static const char small_list[] __initconst = "0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61\n";
+static const char small_mask[] = "33333333,11111111\n";
+static const char small_list[] = "0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61\n";
 
-static const unsigned long large_bitmap[] __initconst = {
+static const unsigned long large_bitmap[] = {
 	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
 	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
 	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
@@ -1101,7 +1018,7 @@ static const unsigned long large_bitmap[] __initconst = {
 	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
 };
 
-static const char large_mask[] __initconst = "33333333,11111111,33333333,11111111,"
+static const char large_mask[] = "33333333,11111111,33333333,11111111,"
 					"33333333,11111111,33333333,11111111,"
 					"33333333,11111111,33333333,11111111,"
 					"33333333,11111111,33333333,11111111,"
@@ -1122,7 +1039,7 @@ static const char large_mask[] __initconst = "33333333,11111111,33333333,1111111
 					"33333333,11111111,33333333,11111111,"
 					"33333333,11111111,33333333,11111111\n";
 
-static const char large_list[] __initconst = /* more than 4KB */
+static const char large_list[] = /* more than 4KB */
 	"0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61,64,68,72,76,80,84,88,92,96-97,100-101,104-1"
 	"05,108-109,112-113,116-117,120-121,124-125,128,132,136,140,144,148,152,156,160-161,164-165,168-169,172-173,176-1"
 	"77,180-181,184-185,188-189,192,196,200,204,208,212,216,220,224-225,228-229,232-233,236-237,240-241,244-245,248-2"
@@ -1164,12 +1081,12 @@ static const char large_list[] __initconst = /* more than 4KB */
 	"2489,2492-2493,2496,2500,2504,2508,2512,2516,2520,2524,2528-2529,2532-2533,2536-2537,2540-2541,2544-2545,2548-25"
 	"49,2552-2553,2556-2557\n";
 
-static const struct test_bitmap_print test_print[] __initconst = {
+static const struct test_bitmap_print test_print[] = {
 	{ small_bitmap, sizeof(small_bitmap) * BITS_PER_BYTE, small_mask, small_list },
 	{ large_bitmap, sizeof(large_bitmap) * BITS_PER_BYTE, large_mask, large_list },
 };
 
-static void __init test_bitmap_print_buf(void)
+static void test_bitmap_print_buf(void)
 {
 	int i;
 
@@ -1201,7 +1118,7 @@ static void __init test_bitmap_print_buf(void)
  * FIXME: Clang breaks compile-time evaluations when KASAN and GCOV are enabled.
  * To workaround it, GCOV is force-disabled in Makefile for this configuration.
  */
-static void __init test_bitmap_const_eval(void)
+static void test_bitmap_const_eval(void)
 {
 	DECLARE_BITMAP(bitmap, BITS_PER_LONG);
 	unsigned long initvar = BIT(2);
@@ -1269,7 +1186,7 @@ static void __init test_bitmap_const_eval(void)
 /*
  * Helper function to test bitmap_write() overwriting the chosen byte pattern.
  */
-static void __init test_bitmap_write_helper(const char *pattern)
+static void test_bitmap_write_helper(const char *pattern)
 {
 	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
 	DECLARE_BITMAP(exp_bitmap, TEST_BIT_LEN);
@@ -1323,7 +1240,7 @@ static void __init test_bitmap_write_helper(const char *pattern)
 	}
 }
 
-static void __init test_bitmap_read_write(void)
+static void test_bitmap_read_write(void)
 {
 	unsigned char *pattern[3] = {"", "all:1/2", "all"};
 	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
@@ -1374,8 +1291,10 @@ static void __init test_bitmap_read_write(void)
 
 #undef TEST_BIT_LEN
 
-static void __init selftest(void)
+static void bitmap_test(struct kunit *test)
 {
+	kunittest = test;
+
 	test_zero_clear();
 	test_fill_set();
 	test_copy();
@@ -1406,7 +1325,18 @@ static void __init selftest(void)
 	test_for_each_set_bit_wrap();
 }
 
-KSTM_MODULE_LOADERS(test_bitmap);
+static struct kunit_case bitmap_test_cases[] = {
+	KUNIT_CASE(bitmap_test),
+	{}
+};
+
+static struct kunit_suite bitmap_test_suite = {
+	.name = "bitmap",
+	.test_cases = bitmap_test_cases,
+};
+
+kunit_test_suite(bitmap_test_suite);
+
 MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
 MODULE_DESCRIPTION("Test cases for bitmap API");
 MODULE_LICENSE("GPL");
diff --git a/tools/testing/selftests/lib/Makefile b/tools/testing/selftests/lib/Makefile
index f876bf4744e1..e4617f153542 100644
--- a/tools/testing/selftests/lib/Makefile
+++ b/tools/testing/selftests/lib/Makefile
@@ -4,5 +4,5 @@
 # No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
 all:
 
-TEST_PROGS := bitmap.sh
+TEST_PROGS :=
 include ../lib.mk
diff --git a/tools/testing/selftests/lib/bitmap.sh b/tools/testing/selftests/lib/bitmap.sh
deleted file mode 100755
index 00a416fbc0ef..000000000000
--- a/tools/testing/selftests/lib/bitmap.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-$(dirname $0)/../kselftest/module.sh "bitmap" test_bitmap
diff --git a/tools/testing/selftests/lib/config b/tools/testing/selftests/lib/config
index 377b3699ff31..3792212895e5 100644
--- a/tools/testing/selftests/lib/config
+++ b/tools/testing/selftests/lib/config
@@ -1,3 +1,2 @@
-CONFIG_TEST_BITMAP=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_TEST_BITOPS=m

-- 
2.52.0


^ permalink raw reply related	[flat|nested] 7+ messages in thread

* [PATCH v2 3/3] bitmap: break kunit into test cases
  2025-12-22 13:39 [PATCH v2 0/3] bitmap: convert self-test to KUnit Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 1/3] test_bitmap: extract benchmark module Tamir Duberstein
  2025-12-22 13:39 ` [PATCH v2 2/3] bitmap: convert self-test to KUnit Tamir Duberstein
@ 2025-12-22 13:39 ` Tamir Duberstein
  2025-12-23 13:22   ` kernel test robot
  2025-12-23 14:18   ` kernel test robot
  2 siblings, 2 replies; 7+ messages in thread
From: Tamir Duberstein @ 2025-12-22 13:39 UTC (permalink / raw)
  To: David Gow, John Hubbard, Andrew Morton, Geert Uytterhoeven,
	Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
	Naveen N Rao, Yury Norov, Rasmus Villemoes, Shuah Khan, Kees Cook,
	Christophe Leroy
  Cc: Muhammad Usama Anjum, linux-kernel, linux-m68k, linuxppc-dev,
	linux-kselftest, Tamir Duberstein

From: Tamir Duberstein <tamird@gmail.com>

Move individual tests into `bitmap_test_cases`.

Retire the tc_err macro. It was using during migration to reduce churn,
but now obscures the opporunity for richer assertion.

Parameterize tests where possible to ensure KUnit assertions produce
descriptive messages.

Reduce duplication between `test_bitmap_parse{,list}`. Note that
`test_bitmap_parse_fn` is defined out-of-line to reduce churn.

Reviewed-by: David Gow <davidgow@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
 lib/bitmap_kunit.c | 388 ++++++++++++++++++++++++++---------------------------
 1 file changed, 191 insertions(+), 197 deletions(-)

diff --git a/lib/bitmap_kunit.c b/lib/bitmap_kunit.c
index 3a71e2039c1f..88770a1804cb 100644
--- a/lib/bitmap_kunit.c
+++ b/lib/bitmap_kunit.c
@@ -10,6 +10,7 @@
 #include <linux/printk.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/uaccess.h>
 
 #define EXP1_IN_BITS	(sizeof(exp1) * 8)
@@ -17,11 +18,6 @@
 static char pbl_buffer[PAGE_SIZE];
 static char print_buf[PAGE_SIZE * 2];
 
-static struct kunit *kunittest;
-
-#define tc_err(fmt, ...) \
-	KUNIT_FAIL(kunittest, fmt, ##__VA_ARGS__)
-
 static const unsigned long exp1[] = {
 	BITMAP_FROM_U64(1),
 	BITMAP_FROM_U64(2),
@@ -87,16 +83,9 @@ static const unsigned long exp3_1_0[] = {
 		}									\
 	} while (0)
 
-#define expect_eq_str(exp_str, str, len)				\
-	{								\
-		if (strncmp(exp_str, str, len) != 0) {			\
-			tc_err("expected %s, got %s", exp_str, str);	\
-		}							\
-	}
-
 #define expect_eq_uint(x, y)		expect_eq_ulong((unsigned int)(x), (unsigned int)(y))
 
-static void test_zero_clear(void)
+static void test_zero_clear(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(bmap, 1024);
 
@@ -125,7 +114,7 @@ static void test_zero_clear(void)
 	expect_eq_pbl("", bmap, 1024);
 }
 
-static void test_find_nth_bit(void)
+static void test_find_nth_bit(struct kunit *kunittest)
 {
 	unsigned long b, bit, cnt = 0;
 	DECLARE_BITMAP(bmap, 64 * 3);
@@ -166,7 +155,7 @@ static void test_find_nth_bit(void)
 	}
 }
 
-static void test_fill_set(void)
+static void test_fill_set(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(bmap, 1024);
 
@@ -195,7 +184,7 @@ static void test_fill_set(void)
 	expect_eq_pbl("0-1023", bmap, 1024);
 }
 
-static void test_copy(void)
+static void test_copy(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(bmap1, 1024);
 	DECLARE_BITMAP(bmap2, 1024);
@@ -234,7 +223,7 @@ static void test_copy(void)
 	expect_eq_pbl("0-108,128-1023", bmap2, 1024);
 }
 
-static void test_bitmap_region(void)
+static void test_bitmap_region(struct kunit *kunittest)
 {
 	int pos, order;
 
@@ -259,7 +248,7 @@ static void test_bitmap_region(void)
 
 #define EXP2_IN_BITS	(sizeof(exp2) * 8)
 
-static void test_replace(void)
+static void test_replace(struct kunit *kunittest)
 {
 	unsigned int nbits = 64;
 	unsigned int nlongs = DIV_ROUND_UP(nbits, BITS_PER_LONG);
@@ -300,7 +289,7 @@ static const unsigned long sg_scatter_exp[] = {
 	BITMAP_FROM_U64(0x000000000000021aULL),
 };
 
-static void test_bitmap_sg(void)
+static void test_bitmap_sg(struct kunit *kunittest)
 {
 	unsigned int nbits = 64;
 	DECLARE_BITMAP(bmap_gather, 100);
@@ -336,6 +325,19 @@ struct test_bitmap_parselist{
 	const int flags;
 };
 
+static void parselist_to_desc(const struct test_bitmap_parselist *param, char *desc)
+{
+	int n = 0;
+
+	n += snprintf(desc + n, KUNIT_PARAM_DESC_SIZE - n, "\"");
+	n += string_escape_str(param->in, desc + n, KUNIT_PARAM_DESC_SIZE - n, ESCAPE_SPACE, NULL);
+	n += snprintf(desc + n, KUNIT_PARAM_DESC_SIZE - n, "\"");
+}
+
+typedef int (*bitmap_parse_fn)(const struct test_bitmap_parselist *test, unsigned long *maskp);
+
+static void test_bitmap_parse_fn(struct kunit *kunittest, bitmap_parse_fn fn);
+
 static const struct test_bitmap_parselist parselist_tests[] = {
 #define step (sizeof(u64) / sizeof(unsigned long))
 
@@ -421,76 +423,60 @@ static const struct test_bitmap_parselist parselist_tests[] = {
 
 };
 
-static void test_bitmap_parselist(void)
+KUNIT_ARRAY_PARAM(test_parselist, parselist_tests, parselist_to_desc);
+
+static int do_bitmap_parselist(const struct test_bitmap_parselist *test, unsigned long *maskp)
 {
-	int i;
+	return bitmap_parselist(test->in, maskp, test->nbits);
+}
+
+static void test_bitmap_parselist(struct kunit *kunittest)
+{
+	test_bitmap_parse_fn(kunittest, do_bitmap_parselist);
+}
+
+static void test_bitmap_parse_fn(struct kunit *kunittest, bitmap_parse_fn fn)
+{
+	const struct test_bitmap_parselist *t = kunittest->param_value;
 	int err;
 	ktime_t time;
 	DECLARE_BITMAP(bmap, 2048);
 
-	for (i = 0; i < ARRAY_SIZE(parselist_tests); i++) {
-#define ptest parselist_tests[i]
-
-		time = ktime_get();
-		err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
-		time = ktime_get() - time;
-
-		if (err != ptest.errno) {
-			tc_err("parselist: %d: input is %s, errno is %d, expected %d",
-					i, ptest.in, err, ptest.errno);
-			continue;
-		}
-
-		if (!err && ptest.expected
-			 && !__bitmap_equal(bmap, ptest.expected, ptest.nbits)) {
-			tc_err("parselist: %d: input is %s, result is 0x%lx, expected 0x%lx",
-					i, ptest.in, bmap[0],
-					*ptest.expected);
-			continue;
-		}
+	time = ktime_get();
+	err = fn(t, bmap);
+	time = ktime_get() - time;
 
-		if (ptest.flags & PARSE_TIME)
-			kunit_info(kunittest, "parselist: %d: input is '%s' OK, Time: %llu",
-					i, ptest.in, time);
+	KUNIT_ASSERT_EQ(kunittest, err, t->errno);
 
-#undef ptest
+	if (!err && t->expected && !__bitmap_equal(bmap, t->expected, t->nbits)) {
+		KUNIT_FAIL_AND_ABORT(kunittest,
+				     "result is 0x%lx, expected 0x%lx", bmap[0], *t->expected);
 	}
+
+	if (t->flags & PARSE_TIME)
+		kunit_info(kunittest, "Time: %llu", time);
 }
 
-static void test_bitmap_printlist(void)
+static void test_bitmap_printlist(struct kunit *kunittest)
 {
-	unsigned long *bmap = kmalloc(PAGE_SIZE, GFP_KERNEL);
-	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	static long bmap[PAGE_SIZE];
+	static char buf[PAGE_SIZE];
 	char expected[256];
 	int ret, slen;
 	ktime_t time;
 
-	if (!buf || !bmap)
-		goto out;
-
 	memset(bmap, -1, PAGE_SIZE);
-	slen = snprintf(expected, 256, "0-%ld", PAGE_SIZE * 8 - 1);
-	if (slen < 0)
-		goto out;
+	slen = snprintf(expected, sizeof(expected), "0-%ld\n", PAGE_SIZE * 8 - 1);
+	KUNIT_ASSERT_GT(kunittest, slen, 0);
 
 	time = ktime_get();
 	ret = bitmap_print_to_pagebuf(true, buf, bmap, PAGE_SIZE * 8);
 	time = ktime_get() - time;
 
-	if (ret != slen + 1) {
-		tc_err("bitmap_print_to_pagebuf: result is %d, expected %d", ret, slen);
-		goto out;
-	}
-
-	if (strncmp(buf, expected, slen)) {
-		tc_err("bitmap_print_to_pagebuf: result is %s, expected %s", buf, expected);
-		goto out;
-	}
+	KUNIT_ASSERT_EQ(kunittest, ret, slen);
+	KUNIT_ASSERT_STREQ(kunittest, buf, expected);
 
-	kunit_info(kunittest, "bitmap_print_to_pagebuf: input is '%s', Time: %llu", buf, time);
-out:
-	kfree(buf);
-	kfree(bmap);
+	kunit_info(kunittest, "Time: %llu", time);
 }
 
 static const unsigned long parse_test[] = {
@@ -533,42 +519,21 @@ static const struct test_bitmap_parselist parse_tests[] = {
 #undef step
 };
 
-static void test_bitmap_parse(void)
-{
-	int i;
-	int err;
-	ktime_t time;
-	DECLARE_BITMAP(bmap, 2048);
-
-	for (i = 0; i < ARRAY_SIZE(parse_tests); i++) {
-		struct test_bitmap_parselist test = parse_tests[i];
-		size_t len = test.flags & NO_LEN ? UINT_MAX : strlen(test.in);
-
-		time = ktime_get();
-		err = bitmap_parse(test.in, len, bmap, test.nbits);
-		time = ktime_get() - time;
+KUNIT_ARRAY_PARAM(test_parse, parse_tests, parselist_to_desc);
 
-		if (err != test.errno) {
-			tc_err("parse: %d: input is %s, errno is %d, expected %d",
-					i, test.in, err, test.errno);
-			continue;
-		}
+static int do_bitmap_parse(const struct test_bitmap_parselist *test, unsigned long *maskp)
+{
+	const size_t len = test->flags & NO_LEN ? UINT_MAX : strlen(test->in);
 
-		if (!err && test.expected
-			 && !__bitmap_equal(bmap, test.expected, test.nbits)) {
-			tc_err("parse: %d: input is %s, result is 0x%lx, expected 0x%lx",
-					i, test.in, bmap[0],
-					*test.expected);
-			continue;
-		}
+	return bitmap_parse(test->in, len, maskp, test->nbits);
+}
 
-		if (test.flags & PARSE_TIME)
-			kunit_info(kunittest, "parse: %d: input is '%s' OK, Time: %llu",
-					i, test.in, time);
-	}
+static void test_bitmap_parse(struct kunit *kunittest)
+{
+	test_bitmap_parse_fn(kunittest, do_bitmap_parse);
 }
 
-static void test_bitmap_arr32(void)
+static void test_bitmap_arr32(struct kunit *kunittest)
 {
 	unsigned int nbits, next_bit;
 	u32 arr[EXP1_IN_BITS / 32];
@@ -584,8 +549,9 @@ static void test_bitmap_arr32(void)
 		next_bit = find_next_bit(bmap2,
 				round_up(nbits, BITS_PER_LONG), nbits);
 		if (next_bit < round_up(nbits, BITS_PER_LONG)) {
-			tc_err("bitmap_copy_arr32(nbits == %d: tail is not safely cleared: %d",
-				nbits, next_bit);
+			KUNIT_FAIL(kunittest,
+				   "bitmap_copy_arr32(nbits == %d: tail is not safely cleared: %d",
+				   nbits, next_bit);
 		}
 
 		if (nbits < EXP1_IN_BITS - 32)
@@ -594,7 +560,7 @@ static void test_bitmap_arr32(void)
 	}
 }
 
-static void test_bitmap_arr64(void)
+static void test_bitmap_arr64(struct kunit *kunittest)
 {
 	unsigned int nbits, next_bit;
 	u64 arr[EXP1_IN_BITS / 64];
@@ -610,15 +576,16 @@ static void test_bitmap_arr64(void)
 
 		next_bit = find_next_bit(bmap2, round_up(nbits, BITS_PER_LONG), nbits);
 		if (next_bit < round_up(nbits, BITS_PER_LONG)) {
-			tc_err("bitmap_copy_arr64(nbits == %d: tail is not safely cleared: %d",
-				nbits, next_bit);
+			KUNIT_FAIL(kunittest,
+				   "bitmap_copy_arr64(nbits == %d: tail is not safely cleared: %d",
+				   nbits, next_bit);
 		}
 
 		if ((nbits % 64) &&
 		    (arr[(nbits - 1) / 64] & ~GENMASK_ULL((nbits - 1) % 64, 0))) {
-			tc_err("bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)",
-			       nbits, arr[(nbits - 1) / 64],
-			       GENMASK_ULL((nbits - 1) % 64, 0));
+			KUNIT_FAIL(kunittest,
+				   "bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)",
+				   nbits, arr[(nbits - 1) / 64], GENMASK_ULL((nbits - 1) % 64, 0));
 		}
 
 		if (nbits < EXP1_IN_BITS - 64)
@@ -626,7 +593,7 @@ static void test_bitmap_arr64(void)
 	}
 }
 
-static noinline void test_mem_optimisations(void)
+static noinline void test_mem_optimisations(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(bmap1, 1024);
 	DECLARE_BITMAP(bmap2, 1024);
@@ -640,19 +607,19 @@ static noinline void test_mem_optimisations(void)
 			bitmap_set(bmap1, start, nbits);
 			__bitmap_set(bmap2, start, nbits);
 			if (!bitmap_equal(bmap1, bmap2, 1024)) {
-				tc_err("set not equal %d %d", start, nbits);
+				KUNIT_FAIL(kunittest, "set not equal %d %d", start, nbits);
 			}
 			if (!__bitmap_equal(bmap1, bmap2, 1024)) {
-				tc_err("set not __equal %d %d", start, nbits);
+				KUNIT_FAIL(kunittest, "set not __equal %d %d", start, nbits);
 			}
 
 			bitmap_clear(bmap1, start, nbits);
 			__bitmap_clear(bmap2, start, nbits);
 			if (!bitmap_equal(bmap1, bmap2, 1024)) {
-				tc_err("clear not equal %d %d", start, nbits);
+				KUNIT_FAIL(kunittest, "clear not equal %d %d", start, nbits);
 			}
 			if (!__bitmap_equal(bmap1, bmap2, 1024)) {
-				tc_err("clear not __equal %d %d", start, nbits);
+				KUNIT_FAIL(kunittest, "clear not __equal %d %d", start, nbits);
 			}
 		}
 	}
@@ -669,7 +636,7 @@ static const unsigned char clump_exp[] = {
 	0x05,	/* non-adjacent 2 bits set */
 };
 
-static void test_for_each_set_clump8(void)
+static void test_for_each_set_clump8(struct kunit *kunittest)
 {
 #define CLUMP_EXP_NUMBITS 64
 	DECLARE_BITMAP(bits, CLUMP_EXP_NUMBITS);
@@ -691,7 +658,7 @@ static void test_for_each_set_clump8(void)
 		expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
 }
 
-static void test_for_each_set_bit_wrap(void)
+static void test_for_each_set_bit_wrap(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -716,7 +683,7 @@ static void test_for_each_set_bit_wrap(void)
 	}
 }
 
-static void test_for_each_set_bit(void)
+static void test_for_each_set_bit(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -738,7 +705,7 @@ static void test_for_each_set_bit(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void test_for_each_set_bit_from(void)
+static void test_for_each_set_bit_from(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -768,7 +735,7 @@ static void test_for_each_set_bit_from(void)
 	}
 }
 
-static void test_for_each_clear_bit(void)
+static void test_for_each_clear_bit(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -790,7 +757,7 @@ static void test_for_each_clear_bit(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void test_for_each_clear_bit_from(void)
+static void test_for_each_clear_bit_from(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -820,7 +787,7 @@ static void test_for_each_clear_bit_from(void)
 	}
 }
 
-static void test_for_each_set_bitrange(void)
+static void test_for_each_set_bitrange(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -842,7 +809,7 @@ static void test_for_each_set_bitrange(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void test_for_each_clear_bitrange(void)
+static void test_for_each_clear_bitrange(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -864,7 +831,7 @@ static void test_for_each_clear_bitrange(void)
 	expect_eq_bitmap(orig, copy, 500);
 }
 
-static void test_for_each_set_bitrange_from(void)
+static void test_for_each_set_bitrange_from(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -894,7 +861,7 @@ static void test_for_each_set_bitrange_from(void)
 	}
 }
 
-static void test_for_each_clear_bitrange_from(void)
+static void test_for_each_clear_bitrange_from(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(orig, 500);
 	DECLARE_BITMAP(copy, 500);
@@ -965,20 +932,50 @@ static struct test_bitmap_cut test_cut[] = {
 	},
 };
 
-static void test_bitmap_cut(void)
+static void cut_to_desc(struct test_bitmap_cut *param, char * const desc)
 {
-	unsigned long b[5], *in = &b[1], *out = &b[0];	/* Partial overlap */
+	int n = 0;
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(test_cut); i++) {
-		struct test_bitmap_cut *t = &test_cut[i];
+	#define append(...) (n += snprintf(desc + n, KUNIT_PARAM_DESC_SIZE - n, ##__VA_ARGS__))
+
+	append("first=%d,cut=%d,nbits=%d", param->first, param->cut, param->nbits);
+
+	#define append_array(name) do {					\
+		{							\
+			append("," #name "={");				\
+			for (i = 0; i < ARRAY_SIZE(param->name); i++) {	\
+				if (param->name[i] == 0) {		\
+					break;				\
+				}					\
+				if (i != 0) {				\
+					append(",");			\
+				}					\
+				append("0x%08lxUL", param->name[i]);	\
+			}						\
+			append("}");					\
+		}							\
+	} while (0)
 
-		memcpy(in, t->in, sizeof(t->in));
+	append_array(in);
+	append_array(expected);
 
-		bitmap_cut(out, in, t->first, t->cut, t->nbits);
+	#undef append_array
+	#undef append
+}
 
-		expect_eq_bitmap(t->expected, out, t->nbits);
-	}
+KUNIT_ARRAY_PARAM(test_cut, test_cut, cut_to_desc);
+
+static void test_bitmap_cut(struct kunit *kunittest)
+{
+	const struct test_bitmap_cut *t = kunittest->param_value;
+	unsigned long b[5], *in = &b[1], *out = &b[0];	/* Partial overlap */
+
+	memcpy(in, t->in, sizeof(t->in));
+
+	bitmap_cut(out, in, t->first, t->cut, t->nbits);
+
+	expect_eq_bitmap(t->expected, out, t->nbits);
 }
 
 struct test_bitmap_print {
@@ -986,6 +983,7 @@ struct test_bitmap_print {
 	unsigned long nbits;
 	const char *mask;
 	const char *list;
+	const char *name;
 };
 
 static const unsigned long small_bitmap[] = {
@@ -1082,35 +1080,33 @@ static const char large_list[] = /* more than 4KB */
 	"49,2552-2553,2556-2557\n";
 
 static const struct test_bitmap_print test_print[] = {
-	{ small_bitmap, sizeof(small_bitmap) * BITS_PER_BYTE, small_mask, small_list },
-	{ large_bitmap, sizeof(large_bitmap) * BITS_PER_BYTE, large_mask, large_list },
+	{ small_bitmap, sizeof(small_bitmap) * BITS_PER_BYTE, small_mask, small_list, "small" },
+	{ large_bitmap, sizeof(large_bitmap) * BITS_PER_BYTE, large_mask, large_list, "large" },
 };
 
-static void test_bitmap_print_buf(void)
+KUNIT_ARRAY_PARAM_DESC(test_print, test_print, name);
+
+static void test_bitmap_print_buf(struct kunit *kunittest)
 {
-	int i;
+	const struct test_bitmap_print *t = kunittest->param_value;
+	int n;
 
-	for (i = 0; i < ARRAY_SIZE(test_print); i++) {
-		const struct test_bitmap_print *t = &test_print[i];
-		int n;
+	n = bitmap_print_bitmask_to_buf(print_buf, t->bitmap, t->nbits,
+					0, 2 * PAGE_SIZE);
+	expect_eq_uint(strlen(t->mask) + 1, n);
+	KUNIT_EXPECT_STREQ(kunittest, t->mask, print_buf);
 
-		n = bitmap_print_bitmask_to_buf(print_buf, t->bitmap, t->nbits,
-						0, 2 * PAGE_SIZE);
-		expect_eq_uint(strlen(t->mask) + 1, n);
-		expect_eq_str(t->mask, print_buf, n);
+	n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
+					0, 2 * PAGE_SIZE);
+	expect_eq_uint(strlen(t->list) + 1, n);
+	KUNIT_EXPECT_STREQ(kunittest, t->list, print_buf);
 
+	/* test by non-zero offset */
+	if (strlen(t->list) > PAGE_SIZE) {
 		n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
-					     0, 2 * PAGE_SIZE);
-		expect_eq_uint(strlen(t->list) + 1, n);
-		expect_eq_str(t->list, print_buf, n);
-
-		/* test by non-zero offset */
-		if (strlen(t->list) > PAGE_SIZE) {
-			n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
-						     PAGE_SIZE, PAGE_SIZE);
-			expect_eq_uint(strlen(t->list) + 1 - PAGE_SIZE, n);
-			expect_eq_str(t->list + PAGE_SIZE, print_buf, n);
-		}
+						PAGE_SIZE, PAGE_SIZE);
+		expect_eq_uint(strlen(t->list) + 1 - PAGE_SIZE, n);
+		KUNIT_EXPECT_STREQ(kunittest, t->list + PAGE_SIZE, print_buf);
 	}
 }
 
@@ -1118,7 +1114,7 @@ static void test_bitmap_print_buf(void)
  * FIXME: Clang breaks compile-time evaluations when KASAN and GCOV are enabled.
  * To workaround it, GCOV is force-disabled in Makefile for this configuration.
  */
-static void test_bitmap_const_eval(void)
+static void test_bitmap_const_eval(struct kunit *kunittest)
 {
 	DECLARE_BITMAP(bitmap, BITS_PER_LONG);
 	unsigned long initvar = BIT(2);
@@ -1183,11 +1179,19 @@ static void test_bitmap_const_eval(void)
  */
 #define TEST_BIT_LEN (1000)
 
-/*
- * Helper function to test bitmap_write() overwriting the chosen byte pattern.
- */
-static void test_bitmap_write_helper(const char *pattern)
+static const char * const pattern[] = {"", "all:1/2", "all"};
+
+static void pattern_to_desc(const char * const *param, char *desc)
 {
+	snprintf(desc, KUNIT_PARAM_DESC_SIZE, "\"%s\"", *param);
+}
+
+KUNIT_ARRAY_PARAM(pattern, pattern, pattern_to_desc);
+
+static void test_bitmap_write_pattern(struct kunit *kunittest)
+{
+	const char * const *p = kunittest->param_value;
+	const char *pattern = *p;
 	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
 	DECLARE_BITMAP(exp_bitmap, TEST_BIT_LEN);
 	DECLARE_BITMAP(pat_bitmap, TEST_BIT_LEN);
@@ -1240,13 +1244,12 @@ static void test_bitmap_write_helper(const char *pattern)
 	}
 }
 
-static void test_bitmap_read_write(void)
+static void test_bitmap_read_write(struct kunit *kunittest)
 {
-	unsigned char *pattern[3] = {"", "all:1/2", "all"};
 	DECLARE_BITMAP(bitmap, TEST_BIT_LEN);
 	unsigned long zero_bits = 0, bits_per_long = BITS_PER_LONG;
 	unsigned long val;
-	int i, pi;
+	int i;
 
 	/*
 	 * Reading/writing zero bits should not crash the kernel.
@@ -1284,49 +1287,40 @@ static void test_bitmap_read_write(void)
 		val = bitmap_read(bitmap, i, 8);
 		expect_eq_ulong(0b10110101UL, val);
 	}
-
-	for (pi = 0; pi < ARRAY_SIZE(pattern); pi++)
-		test_bitmap_write_helper(pattern[pi]);
 }
 
 #undef TEST_BIT_LEN
 
-static void bitmap_test(struct kunit *test)
-{
-	kunittest = test;
-
-	test_zero_clear();
-	test_fill_set();
-	test_copy();
-	test_bitmap_region();
-	test_replace();
-	test_bitmap_sg();
-	test_bitmap_arr32();
-	test_bitmap_arr64();
-	test_bitmap_parse();
-	test_bitmap_parselist();
-	test_bitmap_printlist();
-	test_mem_optimisations();
-	test_bitmap_cut();
-	test_bitmap_print_buf();
-	test_bitmap_const_eval();
-	test_bitmap_read_write();
-
-	test_find_nth_bit();
-	test_for_each_set_bit();
-	test_for_each_set_bit_from();
-	test_for_each_clear_bit();
-	test_for_each_clear_bit_from();
-	test_for_each_set_bitrange();
-	test_for_each_clear_bitrange();
-	test_for_each_set_bitrange_from();
-	test_for_each_clear_bitrange_from();
-	test_for_each_set_clump8();
-	test_for_each_set_bit_wrap();
-}
-
 static struct kunit_case bitmap_test_cases[] = {
-	KUNIT_CASE(bitmap_test),
+	KUNIT_CASE(test_zero_clear),
+	KUNIT_CASE(test_fill_set),
+	KUNIT_CASE(test_copy),
+	KUNIT_CASE(test_bitmap_region),
+	KUNIT_CASE(test_replace),
+	KUNIT_CASE(test_bitmap_sg),
+	KUNIT_CASE(test_bitmap_arr32),
+	KUNIT_CASE(test_bitmap_arr64),
+	KUNIT_CASE_PARAM(test_bitmap_parse, test_parse_gen_params),
+	KUNIT_CASE_PARAM(test_bitmap_parselist, test_parselist_gen_params),
+	KUNIT_CASE(test_bitmap_printlist),
+	KUNIT_CASE(test_mem_optimisations),
+	KUNIT_CASE_PARAM(test_bitmap_cut, test_cut_gen_params),
+	KUNIT_CASE_PARAM(test_bitmap_print_buf, test_print_gen_params),
+	KUNIT_CASE(test_bitmap_const_eval),
+	KUNIT_CASE(test_bitmap_read_write),
+	KUNIT_CASE_PARAM(test_bitmap_write_pattern, pattern_gen_params),
+
+	KUNIT_CASE(test_find_nth_bit),
+	KUNIT_CASE(test_for_each_set_bit),
+	KUNIT_CASE(test_for_each_set_bit_from),
+	KUNIT_CASE(test_for_each_clear_bit),
+	KUNIT_CASE(test_for_each_clear_bit_from),
+	KUNIT_CASE(test_for_each_set_bitrange),
+	KUNIT_CASE(test_for_each_clear_bitrange),
+	KUNIT_CASE(test_for_each_set_bitrange_from),
+	KUNIT_CASE(test_for_each_clear_bitrange_from),
+	KUNIT_CASE(test_for_each_set_clump8),
+	KUNIT_CASE(test_for_each_set_bit_wrap),
 	{}
 };
 

-- 
2.52.0


^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [PATCH v2 3/3] bitmap: break kunit into test cases
  2025-12-22 13:39 ` [PATCH v2 3/3] bitmap: break kunit into test cases Tamir Duberstein
@ 2025-12-23 13:22   ` kernel test robot
  2025-12-23 14:18   ` kernel test robot
  1 sibling, 0 replies; 7+ messages in thread
From: kernel test robot @ 2025-12-23 13:22 UTC (permalink / raw)
  To: Tamir Duberstein, David Gow, John Hubbard, Andrew Morton,
	Geert Uytterhoeven, Madhavan Srinivasan, Michael Ellerman,
	Nicholas Piggin, Naveen N Rao, Yury Norov, Rasmus Villemoes,
	Shuah Khan, Kees Cook, Christophe Leroy
  Cc: oe-kbuild-all, Linux Memory Management List, Muhammad Usama Anjum,
	linux-kernel, linux-m68k, linuxppc-dev, linux-kselftest,
	Tamir Duberstein

Hi Tamir,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8f0b4cce4481fb22653697cced8d0d04027cb1e8]

url:    https://github.com/intel-lab-lkp/linux/commits/Tamir-Duberstein/test_bitmap-extract-benchmark-module/20251222-214306
base:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
patch link:    https://lore.kernel.org/r/20251222-bitmap-kunit-convert-v2-3-6a61a5330eff%40gmail.com
patch subject: [PATCH v2 3/3] bitmap: break kunit into test cases
config: sparc-randconfig-001-20251223 (https://download.01.org/0day-ci/archive/20251223/202512232124.O36Ud5C2-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251223/202512232124.O36Ud5C2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512232124.O36Ud5C2-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/string.h:65,
                    from include/linux/bitmap.h:13,
                    from include/linux/cpumask.h:11,
                    from include/linux/smp.h:13,
                    from include/linux/lockdep.h:14,
                    from include/linux/spinlock.h:63,
                    from include/linux/kref.h:16,
                    from include/kunit/test.h:22,
                    from lib/bitmap_kunit.c:6:
   lib/bitmap_kunit.c: In function 'test_bitmap_printlist':
>> arch/sparc/include/asm/string.h:18:29: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
      18 | #define memset(s, c, count) __builtin_memset(s, c, count)
         |                             ^~~~~~~~~~~~~~~~
   lib/bitmap_kunit.c:468:9: note: in expansion of macro 'memset'
     468 |         memset(bmap, -1, PAGE_SIZE);
         |         ^~~~~~


vim +/memset +18 arch/sparc/include/asm/string.h

70a6fcf3283a0a Al Viro 2016-01-17  16  
70a6fcf3283a0a Al Viro 2016-01-17  17  #define __HAVE_ARCH_MEMSET
70a6fcf3283a0a Al Viro 2016-01-17 @18  #define memset(s, c, count) __builtin_memset(s, c, count)
70a6fcf3283a0a Al Viro 2016-01-17  19  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2 3/3] bitmap: break kunit into test cases
  2025-12-22 13:39 ` [PATCH v2 3/3] bitmap: break kunit into test cases Tamir Duberstein
  2025-12-23 13:22   ` kernel test robot
@ 2025-12-23 14:18   ` kernel test robot
  1 sibling, 0 replies; 7+ messages in thread
From: kernel test robot @ 2025-12-23 14:18 UTC (permalink / raw)
  To: Tamir Duberstein, David Gow, John Hubbard, Andrew Morton,
	Geert Uytterhoeven, Madhavan Srinivasan, Michael Ellerman,
	Nicholas Piggin, Naveen N Rao, Yury Norov, Rasmus Villemoes,
	Shuah Khan, Kees Cook, Christophe Leroy
  Cc: oe-kbuild-all, Linux Memory Management List, Muhammad Usama Anjum,
	linux-kernel, linux-m68k, linuxppc-dev, linux-kselftest,
	Tamir Duberstein

Hi Tamir,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8f0b4cce4481fb22653697cced8d0d04027cb1e8]

url:    https://github.com/intel-lab-lkp/linux/commits/Tamir-Duberstein/test_bitmap-extract-benchmark-module/20251222-214306
base:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
patch link:    https://lore.kernel.org/r/20251222-bitmap-kunit-convert-v2-3-6a61a5330eff%40gmail.com
patch subject: [PATCH v2 3/3] bitmap: break kunit into test cases
config: arm64-randconfig-004-20251223 (https://download.01.org/0day-ci/archive/20251223/202512232235.vUHmJH7T-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251223/202512232235.vUHmJH7T-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512232235.vUHmJH7T-lkp@intel.com/

All warnings (new ones prefixed by >>):

   lib/bitmap_kunit.c: In function 'test_bitmap_printlist':
>> lib/bitmap_kunit.c:468:2: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
     468 |  memset(bmap, -1, PAGE_SIZE);
         |  ^~~~~~


vim +/memset +468 lib/bitmap_kunit.c

6ea86bdfc169ba lib/test_bitmap.c  Yury Norov       2019-05-14  459  
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  460  static void test_bitmap_printlist(struct kunit *kunittest)
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  461  {
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  462  	static long bmap[PAGE_SIZE];
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  463  	static char buf[PAGE_SIZE];
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  464  	char expected[256];
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  465  	int ret, slen;
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  466  	ktime_t time;
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  467  
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14 @468  	memset(bmap, -1, PAGE_SIZE);
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  469  	slen = snprintf(expected, sizeof(expected), "0-%ld\n", PAGE_SIZE * 8 - 1);
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  470  	KUNIT_ASSERT_GT(kunittest, slen, 0);
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  471  
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  472  	time = ktime_get();
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  473  	ret = bitmap_print_to_pagebuf(true, buf, bmap, PAGE_SIZE * 8);
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  474  	time = ktime_get() - time;
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  475  
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  476  	KUNIT_ASSERT_EQ(kunittest, ret, slen);
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  477  	KUNIT_ASSERT_STREQ(kunittest, buf, expected);
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  478  
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein 2025-12-22  479  	kunit_info(kunittest, "Time: %llu", time);
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  480  }
db7313005e9c2d lib/test_bitmap.c  Yury Norov       2021-08-14  481  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2 3/3] bitmap: break kunit into test cases
@ 2025-12-23 15:36 kernel test robot
  0 siblings, 0 replies; 7+ messages in thread
From: kernel test robot @ 2025-12-23 15:36 UTC (permalink / raw)
  To: oe-kbuild; +Cc: lkp

:::::: 
:::::: Manual check reason: "__compiletime_assert_NNN"
:::::: 

BCC: lkp@intel.com
CC: llvm@lists.linux.dev
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20251222-bitmap-kunit-convert-v2-3-6a61a5330eff@gmail.com>
References: <20251222-bitmap-kunit-convert-v2-3-6a61a5330eff@gmail.com>
TO: Tamir Duberstein <tamird@kernel.org>
TO: David Gow <davidgow@google.com>
TO: John Hubbard <jhubbard@nvidia.com>
TO: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Geert Uytterhoeven <geert@linux-m68k.org>
TO: Madhavan Srinivasan <maddy@linux.ibm.com>
TO: Michael Ellerman <mpe@ellerman.id.au>
TO: Nicholas Piggin <npiggin@gmail.com>
TO: Naveen N Rao <naveen@kernel.org>
TO: Yury Norov <yury.norov@gmail.com>
TO: Rasmus Villemoes <linux@rasmusvillemoes.dk>
TO: Shuah Khan <skhan@linuxfoundation.org>
TO: Kees Cook <kees@kernel.org>
TO: Christophe Leroy <chleroy@kernel.org>
CC: Muhammad Usama Anjum <usama.anjum@collabora.com>
CC: linux-kernel@vger.kernel.org
CC: linux-m68k@lists.linux-m68k.org
CC: linuxppc-dev@lists.ozlabs.org
CC: linux-kselftest@vger.kernel.org
CC: Tamir Duberstein <tamird@gmail.com>

Hi Tamir,

kernel test robot noticed the following build errors:

[auto build test ERROR on 8f0b4cce4481fb22653697cced8d0d04027cb1e8]

url:    https://github.com/intel-lab-lkp/linux/commits/Tamir-Duberstein/test_bitmap-extract-benchmark-module/20251222-214306
base:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
patch link:    https://lore.kernel.org/r/20251222-bitmap-kunit-convert-v2-3-6a61a5330eff%40gmail.com
patch subject: [PATCH v2 3/3] bitmap: break kunit into test cases
:::::: branch date: 26 hours ago
:::::: commit date: 26 hours ago
config: x86_64-randconfig-076-20251223 (https://download.01.org/0day-ci/archive/20251223/202512232357.nliFXSgy-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251223/202512232357.nliFXSgy-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202512232357.nliFXSgy-lkp@intel.com/

All errors (new ones prefixed by >>):

>> lib/bitmap_kunit.c:1163:2: error: call to '__compiletime_assert_615' declared with 'error' attribute: BUILD_BUG_ON failed: !__builtin_constant_p(~var)
    1163 |         BUILD_BUG_ON(!__builtin_constant_p(~var));
         |         ^
   include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:630:2: note: expanded from macro 'compiletime_assert'
     630 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:618:2: note: expanded from macro '_compiletime_assert'
     618 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:611:4: note: expanded from macro '__compiletime_assert'
     611 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:93:1: note: expanded from here
      93 | __compiletime_assert_615
         | ^
   1 error generated.


vim +1163 lib/bitmap_kunit.c

291f93ca339f5b lib/test_bitmap.c  Barry Song        2021-08-06  1112  
2356d198d2b4dd lib/test_bitmap.c  Yury Norov        2023-07-17  1113  /*
2356d198d2b4dd lib/test_bitmap.c  Yury Norov        2023-07-17  1114   * FIXME: Clang breaks compile-time evaluations when KASAN and GCOV are enabled.
2356d198d2b4dd lib/test_bitmap.c  Yury Norov        2023-07-17  1115   * To workaround it, GCOV is force-disabled in Makefile for this configuration.
2356d198d2b4dd lib/test_bitmap.c  Yury Norov        2023-07-17  1116   */
8ef3340af7139f lib/bitmap_kunit.c Tamir Duberstein  2025-12-22  1117  static void test_bitmap_const_eval(struct kunit *kunittest)
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1118  {
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1119  	DECLARE_BITMAP(bitmap, BITS_PER_LONG);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1120  	unsigned long initvar = BIT(2);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1121  	unsigned long bitopvar = 0;
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1122  	unsigned long var = 0;
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1123  	int res;
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1124  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1125  	/*
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1126  	 * Compilers must be able to optimize all of those to compile-time
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1127  	 * constants on any supported optimization level (-O2, -Os) and any
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1128  	 * architecture. Otherwise, trigger a build bug.
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1129  	 * The whole function gets optimized out then, there's nothing to do
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1130  	 * in runtime.
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1131  	 */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1132  
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1133  	/* Equals to `unsigned long bitmap[1] = { GENMASK(6, 5), }` */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1134  	bitmap_clear(bitmap, 0, BITS_PER_LONG);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1135  	if (!test_bit(7, bitmap))
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1136  		bitmap_set(bitmap, 5, 2);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1137  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1138  	/* Equals to `unsigned long bitopvar = BIT(20)` */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1139  	__change_bit(31, &bitopvar);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1140  	bitmap_shift_right(&bitopvar, &bitopvar, 11, BITS_PER_LONG);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1141  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1142  	/* Equals to `unsigned long var = BIT(25)` */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1143  	var |= BIT(25);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1144  	if (var & BIT(0))
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1145  		var ^= GENMASK(9, 6);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1146  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1147  	/* __const_hweight<32|64>(GENMASK(6, 5)) == 2 */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1148  	res = bitmap_weight(bitmap, 20);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1149  	BUILD_BUG_ON(!__builtin_constant_p(res));
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1150  	BUILD_BUG_ON(res != 2);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1151  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1152  	/* !(BIT(31) & BIT(18)) == 1 */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1153  	res = !test_bit(18, &bitopvar);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1154  	BUILD_BUG_ON(!__builtin_constant_p(res));
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1155  	BUILD_BUG_ON(!res);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1156  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1157  	/* BIT(2) & GENMASK(14, 8) == 0 */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1158  	res = initvar & GENMASK(14, 8);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1159  	BUILD_BUG_ON(!__builtin_constant_p(res));
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1160  	BUILD_BUG_ON(res);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1161  
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1162  	/* ~BIT(25) */
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24 @1163  	BUILD_BUG_ON(!__builtin_constant_p(~var));
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1164  	BUILD_BUG_ON(~var != ~BIT(25));
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1165  
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1166  	/* ~BIT(25) | BIT(25) == ~0UL */
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1167  	bitmap_complement(&var, &var, BITS_PER_LONG);
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1168  	__assign_bit(25, &var, true);
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1169  
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1170  	/* !(~(~0UL)) == 1 */
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1171  	res = bitmap_full(&var, BITS_PER_LONG);
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1172  	BUILD_BUG_ON(!__builtin_constant_p(res));
7adaf37f7f104a lib/test_bitmap.c  Alexander Lobakin 2024-03-27  1173  	BUILD_BUG_ON(!res);
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1174  }
dc34d5036692c6 lib/test_bitmap.c  Alexander Lobakin 2022-06-24  1175  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

^ permalink raw reply	[flat|nested] 7+ messages in thread

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2025-12-22 13:39 [PATCH v2 0/3] bitmap: convert self-test to KUnit Tamir Duberstein
2025-12-22 13:39 ` [PATCH v2 1/3] test_bitmap: extract benchmark module Tamir Duberstein
2025-12-22 13:39 ` [PATCH v2 2/3] bitmap: convert self-test to KUnit Tamir Duberstein
2025-12-22 13:39 ` [PATCH v2 3/3] bitmap: break kunit into test cases Tamir Duberstein
2025-12-23 13:22   ` kernel test robot
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