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