linux/lib/test_bits.c
Rikard Falkeborn 6d511020e1 lib/test_bits.c: add tests of GENMASK
Add tests of GENMASK and GENMASK_ULL.

A few test cases that should fail compilation are provided under #ifdef
TEST_GENMASK_FAILURES

[rd.dunlap@gmail.com: add MODULE_LICENSE()]
  Link: http://lkml.kernel.org/r/dfc74524-0789-2827-4eff-476ddab65699@gmail.com
[weiyongjun1@huawei.com: make some functions static]
  Link: http://lkml.kernel.org/r/20200702150336.4756-1-weiyongjun1@huawei.com

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Randy Dunlap <rd.dunlap@gmail.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Cc: Syed Nayyar Waris <syednwaris@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: http://lkml.kernel.org/r/20200621054210.14804-2-rikard.falkeborn@gmail.com
Link: http://lkml.kernel.org/r/20200608221823.35799-2-rikard.falkeborn@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-12 10:58:00 -07:00

76 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Test cases for functions and macros in bits.h
*/
#include <kunit/test.h>
#include <linux/bits.h>
static void genmask_test(struct kunit *test)
{
KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0));
KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0));
KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1));
KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0));
#ifdef TEST_GENMASK_FAILURES
/* these should fail compilation */
GENMASK(0, 1);
GENMASK(0, 10);
GENMASK(9, 10);
#endif
}
static void genmask_ull_test(struct kunit *test)
{
KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0));
KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0));
KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21));
KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0));
#ifdef TEST_GENMASK_FAILURES
/* these should fail compilation */
GENMASK_ULL(0, 1);
GENMASK_ULL(0, 10);
GENMASK_ULL(9, 10);
#endif
}
static void genmask_input_check_test(struct kunit *test)
{
unsigned int x, y;
int z, w;
/* Unknown input */
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));
/* Valid input */
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
}
static struct kunit_case bits_test_cases[] = {
KUNIT_CASE(genmask_test),
KUNIT_CASE(genmask_ull_test),
KUNIT_CASE(genmask_input_check_test),
{}
};
static struct kunit_suite bits_test_suite = {
.name = "bits-test",
.test_cases = bits_test_cases,
};
kunit_test_suite(bits_test_suite);
MODULE_LICENSE("GPL");