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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2020 Intel Corporation * Copyright (C) 2026 Ryota Sakamoto <sakamo.ryota@gmail.com> */
#include <linux/bitops.h>#include <linux/module.h>#include <kunit/test.h>
/* use an enum because that's the most common BITMAP usage */enum bitops_fun { BITOPS_4 = 4, BITOPS_7 = 7, BITOPS_11 = 11, BITOPS_31 = 31, BITOPS_88 = 88, BITOPS_LENGTH = 256};
struct bitops_test_case { const char *str; const long nr;};
static struct bitops_test_case bitops_cases[] = { { .str = "BITOPS_4", .nr = BITOPS_4, }, { .str = "BITOPS_7", .nr = BITOPS_7, }, { .str = "BITOPS_11", .nr = BITOPS_11, }, { .str = "BITOPS_31", .nr = BITOPS_31, }, { .str = "BITOPS_88", .nr = BITOPS_88, },};
KUNIT_ARRAY_PARAM_DESC(bitops, bitops_cases, str);
static void test_set_bit_clear_bit(struct kunit *test){ const struct bitops_test_case *params = test->param_value; DECLARE_BITMAP(bitmap, BITOPS_LENGTH); int bit_set;
bitmap_zero(bitmap, BITOPS_LENGTH);
set_bit(params->nr, bitmap); KUNIT_EXPECT_TRUE(test, test_bit(params->nr, bitmap));
clear_bit(params->nr, bitmap); KUNIT_EXPECT_FALSE(test, test_bit(params->nr, bitmap));
bit_set = find_first_bit(bitmap, BITOPS_LENGTH); KUNIT_EXPECT_EQ(test, bit_set, BITOPS_LENGTH);}
static void test_change_bit(struct kunit *test){ const struct bitops_test_case *params = test->param_value; DECLARE_BITMAP(bitmap, BITOPS_LENGTH); int bit_set;
bitmap_zero(bitmap, BITOPS_LENGTH);
change_bit(params->nr, bitmap); KUNIT_EXPECT_TRUE(test, test_bit(params->nr, bitmap));
change_bit(params->nr, bitmap); KUNIT_EXPECT_FALSE(test, test_bit(params->nr, bitmap));
bit_set = find_first_bit(bitmap, BITOPS_LENGTH); KUNIT_EXPECT_EQ(test, bit_set, BITOPS_LENGTH);}
static void test_test_and_set_bit_test_and_clear_bit(struct kunit *test){ const struct bitops_test_case *params = test->param_value; DECLARE_BITMAP(bitmap, BITOPS_LENGTH); int bit_set;
bitmap_zero(bitmap, BITOPS_LENGTH);
KUNIT_EXPECT_FALSE(test, test_and_set_bit(params->nr, bitmap)); KUNIT_EXPECT_TRUE(test, test_bit(params->nr, bitmap));
KUNIT_EXPECT_TRUE(test, test_and_set_bit(params->nr, bitmap)); KUNIT_EXPECT_TRUE(test, test_bit(params->nr, bitmap));
KUNIT_EXPECT_TRUE(test, test_and_clear_bit(params->nr, bitmap)); KUNIT_EXPECT_FALSE(test, test_bit(params->nr, bitmap));
KUNIT_EXPECT_FALSE(test, test_and_clear_bit(params->nr, bitmap)); KUNIT_EXPECT_FALSE(test, test_bit(params->nr, bitmap));
bit_set = find_first_bit(bitmap, BITOPS_LENGTH); KUNIT_EXPECT_EQ(test, bit_set, BITOPS_LENGTH);}
static void test_test_and_change_bit(struct kunit *test){ const struct bitops_test_case *params = test->param_value; DECLARE_BITMAP(bitmap, BITOPS_LENGTH); int bit_set;
bitmap_zero(bitmap, BITOPS_LENGTH);
KUNIT_EXPECT_FALSE(test, test_and_change_bit(params->nr, bitmap)); KUNIT_EXPECT_TRUE(test, test_bit(params->nr, bitmap));
KUNIT_EXPECT_TRUE(test, test_and_change_bit(params->nr, bitmap)); KUNIT_EXPECT_FALSE(test, test_bit(params->nr, bitmap));
bit_set = find_first_bit(bitmap, BITOPS_LENGTH); KUNIT_EXPECT_EQ(test, bit_set, BITOPS_LENGTH);}
struct order_test_case { const char *str; const unsigned int count; const int expected;};
static struct order_test_case order_test_cases[] = { {"0x00000003", 0x00000003, 2}, {"0x00000004", 0x00000004, 2}, {"0x00001fff", 0x00001fff, 13}, {"0x00002000", 0x00002000, 13}, {"0x50000000", 0x50000000, 31}, {"0x80000000", 0x80000000, 31}, {"0x80003000", 0x80003000, 32},};
KUNIT_ARRAY_PARAM_DESC(order, order_test_cases, str);
static void test_get_count_order(struct kunit *test){ const struct order_test_case *params = test->param_value;
KUNIT_EXPECT_EQ(test, get_count_order(params->count), params->expected); KUNIT_EXPECT_EQ(test, get_count_order_long(params->count), params->expected);}
#ifdef CONFIG_64BITstruct order_long_test_case { const char *str; const unsigned long count; const int expected;};
static struct order_long_test_case order_long_test_cases[] = { {"0x0000000300000000", 0x0000000300000000, 34}, {"0x0000000400000000", 0x0000000400000000, 34}, {"0x00001fff00000000", 0x00001fff00000000, 45}, {"0x0000200000000000", 0x0000200000000000, 45}, {"0x5000000000000000", 0x5000000000000000, 63}, {"0x8000000000000000", 0x8000000000000000, 63}, {"0x8000300000000000", 0x8000300000000000, 64},};
KUNIT_ARRAY_PARAM_DESC(order_long, order_long_test_cases, str);
static void test_get_count_order_long(struct kunit *test){ const struct order_long_test_case *params = test->param_value;
KUNIT_EXPECT_EQ(test, get_count_order_long(params->count), params->expected);}#endif
static struct kunit_case bitops_test_cases[] = { KUNIT_CASE_PARAM(test_set_bit_clear_bit, bitops_gen_params), KUNIT_CASE_PARAM(test_change_bit, bitops_gen_params), KUNIT_CASE_PARAM(test_test_and_set_bit_test_and_clear_bit, bitops_gen_params), KUNIT_CASE_PARAM(test_test_and_change_bit, bitops_gen_params), KUNIT_CASE_PARAM(test_get_count_order, order_gen_params),#ifdef CONFIG_64BIT KUNIT_CASE_PARAM(test_get_count_order_long, order_long_gen_params),#endif {},};
static struct kunit_suite bitops_test_suite = { .name = "bitops", .test_cases = bitops_test_cases,};
kunit_test_suite(bitops_test_suite);
MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>");MODULE_AUTHOR("Wei Yang <richard.weiyang@gmail.com>");MODULE_AUTHOR("Ryota Sakamoto <sakamo.ryota@gmail.com>");MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Bit testing module");