lib: kunit: add bitfield test conversion to KUnit

This adds the conversion of the runtime tests of test_bitfield,
from `lib/test_bitfield.c` to KUnit tests.

Code Style Documentation: [0]

Signed-off-by: Vitor Massaru Iha <vitor@massaru.org>
Link: [0] https://lore.kernel.org/linux-kselftest/20200620054944.167330-1-davidgow@google.com/T/#u
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

1 files changed, 0 insertions, 168 deletions

diff --git a/lib/test_bitfield.c b/lib/test_bitfield.c
deleted file mode 100644
index 5b8f4108662d..000000000000
--- a/lib/test_bitfield.c
+++ /dev/null
@@ -1,168 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Test cases for bitfield helpers.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/bitfield.h>
-
-#define CHECK_ENC_GET_U(tp, v, field, res) do {				\
-		{							\
-			u##tp _res;					\
-									\
-			_res = u##tp##_encode_bits(v, field);		\
-			if (_res != res) {				\
-				pr_warn("u" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != " #res "\n",\
-					(u64)_res);			\
-				return -EINVAL;				\
-			}						\
-			if (u##tp##_get_bits(_res, field) != v)		\
-				return -EINVAL;				\
-		}							\
-	} while (0)
-
-#define CHECK_ENC_GET_LE(tp, v, field, res) do {			\
-		{							\
-			__le##tp _res;					\
-									\
-			_res = le##tp##_encode_bits(v, field);		\
-			if (_res != cpu_to_le##tp(res)) {		\
-				pr_warn("le" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != 0x%llx\n",\
-					(u64)le##tp##_to_cpu(_res),	\
-					(u64)(res));			\
-				return -EINVAL;				\
-			}						\
-			if (le##tp##_get_bits(_res, field) != v)	\
-				return -EINVAL;				\
-		}							\
-	} while (0)
-
-#define CHECK_ENC_GET_BE(tp, v, field, res) do {			\
-		{							\
-			__be##tp _res;					\
-									\
-			_res = be##tp##_encode_bits(v, field);		\
-			if (_res != cpu_to_be##tp(res)) {		\
-				pr_warn("be" #tp "_encode_bits(" #v ", " #field ") is 0x%llx != 0x%llx\n",\
-					(u64)be##tp##_to_cpu(_res),	\
-					(u64)(res));			\
-				return -EINVAL;				\
-			}						\
-			if (be##tp##_get_bits(_res, field) != v)	\
-				return -EINVAL;				\
-		}							\
-	} while (0)
-
-#define CHECK_ENC_GET(tp, v, field, res) do {				\
-		CHECK_ENC_GET_U(tp, v, field, res);			\
-		CHECK_ENC_GET_LE(tp, v, field, res);			\
-		CHECK_ENC_GET_BE(tp, v, field, res);			\
-	} while (0)
-
-static int test_constants(void)
-{
-	/*
-	 * NOTE
-	 * This whole function compiles (or at least should, if everything
-	 * is going according to plan) to nothing after optimisation.
-	 */
-
-	CHECK_ENC_GET(16,  1, 0x000f, 0x0001);
-	CHECK_ENC_GET(16,  3, 0x00f0, 0x0030);
-	CHECK_ENC_GET(16,  5, 0x0f00, 0x0500);
-	CHECK_ENC_GET(16,  7, 0xf000, 0x7000);
-	CHECK_ENC_GET(16, 14, 0x000f, 0x000e);
-	CHECK_ENC_GET(16, 15, 0x00f0, 0x00f0);
-
-	CHECK_ENC_GET_U(8,  1, 0x0f, 0x01);
-	CHECK_ENC_GET_U(8,  3, 0xf0, 0x30);
-	CHECK_ENC_GET_U(8, 14, 0x0f, 0x0e);
-	CHECK_ENC_GET_U(8, 15, 0xf0, 0xf0);
-
-	CHECK_ENC_GET(32,  1, 0x00000f00, 0x00000100);
-	CHECK_ENC_GET(32,  3, 0x0000f000, 0x00003000);
-	CHECK_ENC_GET(32,  5, 0x000f0000, 0x00050000);
-	CHECK_ENC_GET(32,  7, 0x00f00000, 0x00700000);
-	CHECK_ENC_GET(32, 14, 0x0f000000, 0x0e000000);
-	CHECK_ENC_GET(32, 15, 0xf0000000, 0xf0000000);
-
-	CHECK_ENC_GET(64,  1, 0x00000f0000000000ull, 0x0000010000000000ull);
-	CHECK_ENC_GET(64,  3, 0x0000f00000000000ull, 0x0000300000000000ull);
-	CHECK_ENC_GET(64,  5, 0x000f000000000000ull, 0x0005000000000000ull);
-	CHECK_ENC_GET(64,  7, 0x00f0000000000000ull, 0x0070000000000000ull);
-	CHECK_ENC_GET(64, 14, 0x0f00000000000000ull, 0x0e00000000000000ull);
-	CHECK_ENC_GET(64, 15, 0xf000000000000000ull, 0xf000000000000000ull);
-
-	return 0;
-}
-
-#define CHECK(tp, mask) do {						\
-		u64 v;							\
-									\
-		for (v = 0; v < 1 << hweight32(mask); v++)		\
-			if (tp##_encode_bits(v, mask) != v << __ffs64(mask)) \
-				return -EINVAL;				\
-	} while (0)
-
-static int test_variables(void)
-{
-	CHECK(u8, 0x0f);
-	CHECK(u8, 0xf0);
-	CHECK(u8, 0x38);
-
-	CHECK(u16, 0x0038);
-	CHECK(u16, 0x0380);
-	CHECK(u16, 0x3800);
-	CHECK(u16, 0x8000);
-
-	CHECK(u32, 0x80000000);
-	CHECK(u32, 0x7f000000);
-	CHECK(u32, 0x07e00000);
-	CHECK(u32, 0x00018000);
-
-	CHECK(u64, 0x8000000000000000ull);
-	CHECK(u64, 0x7f00000000000000ull);
-	CHECK(u64, 0x0001800000000000ull);
-	CHECK(u64, 0x0000000080000000ull);
-	CHECK(u64, 0x000000007f000000ull);
-	CHECK(u64, 0x0000000018000000ull);
-	CHECK(u64, 0x0000001f8000000ull);
-
-	return 0;
-}
-
-static int __init test_bitfields(void)
-{
-	int ret = test_constants();
-
-	if (ret) {
-		pr_warn("constant tests failed!\n");
-		return ret;
-	}
-
-	ret = test_variables();
-	if (ret) {
-		pr_warn("variable tests failed!\n");
-		return ret;
-	}
-
-#ifdef TEST_BITFIELD_COMPILE
-	/* these should fail compilation */
-	CHECK_ENC_GET(16, 16, 0x0f00, 0x1000);
-	u32_encode_bits(7, 0x06000000);
-
-	/* this should at least give a warning */
-	u16_encode_bits(0, 0x60000);
-#endif
-
-	pr_info("tests passed\n");
-
-	return 0;
-}
-module_init(test_bitfields)
-
-MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
-MODULE_LICENSE("GPL");