// 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_u128_test(struct kunit *test){#ifdef CONFIG_ARCH_SUPPORTS_INT128	/* Below 64 bit masks */	KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(0, 0));	KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(1, 0));	KUNIT_EXPECT_EQ(test, 0x0000000000000006ull, GENMASK_U128(2, 1));	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(31, 0));	KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_U128(39, 21));	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(63, 0)); 	/* Above 64 bit masks - only 64 bit portion can be validated once */	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(64, 0) >> 1);	KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(81, 50) >> 50);	KUNIT_EXPECT_EQ(test, 0x0000000000ffffffull, GENMASK_U128(87, 64) >> 64);	KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ull, GENMASK_U128(87, 80) >> 64); 	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(127, 0) >> 64);	KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, (u64)GENMASK_U128(127, 0));	KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(127, 126) >> 126);	KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(127, 127) >> 127);#ifdef TEST_GENMASK_FAILURES	/* these should fail compilation */	GENMASK_U128(0, 1);	GENMASK_U128(0, 10);	GENMASK_U128(9, 10);#endif /* TEST_GENMASK_FAILURES */#endif /* CONFIG_ARCH_SUPPORTS_INT128 */} 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));	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));	KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(127, 0));}  static struct kunit_case bits_test_cases[] = {	KUNIT_CASE(genmask_test),	KUNIT_CASE(genmask_ull_test),	KUNIT_CASE(genmask_u128_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_DESCRIPTION("Test cases for functions and macros in bits.h");MODULE_LICENSE("GPL");