mm/damon: remove DAMON debugfs interface kunit tests

It's time to remove DAMON debugfs interface, which has deprecated long
before in February 2023.  Read the cover letter of this patch series for
more details.

Remove kunit tests for the interface, to prevent unnecessary test
failures.

Link: https://lkml.kernel.org/r/20250106191941.107070-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Alex Shi <alexs@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Hu Haowen <2023002089@link.tyut.edu.cn>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Rae Moar <rmoar@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 0 insertions, 173 deletions

diff --git a/mm/damon/tests/dbgfs-kunit.h b/mm/damon/tests/dbgfs-kunit.h
deleted file mode 100644
index 087e53f641a8..000000000000
--- a/mm/damon/tests/dbgfs-kunit.h
+++ /dev/null
@@ -1,173 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * DAMON Debugfs Interface Unit Tests
- *
- * Author: SeongJae Park <sj@kernel.org>
- */
-
-#ifdef CONFIG_DAMON_DBGFS_KUNIT_TEST
-
-#ifndef _DAMON_DBGFS_TEST_H
-#define _DAMON_DBGFS_TEST_H
-
-#include <kunit/test.h>
-
-static void damon_dbgfs_test_str_to_ints(struct kunit *test)
-{
-	char *question;
-	int *answers;
-	int expected[] = {12, 35, 46};
-	ssize_t nr_integers = 0, i;
-
-	question = "123";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
-	KUNIT_EXPECT_EQ(test, 123, answers[0]);
-	kfree(answers);
-
-	question = "123abc";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
-	KUNIT_EXPECT_EQ(test, 123, answers[0]);
-	kfree(answers);
-
-	question = "a123";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
-	kfree(answers);
-
-	question = "12 35";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
-	for (i = 0; i < nr_integers; i++)
-		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
-	kfree(answers);
-
-	question = "12 35 46";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)3, nr_integers);
-	for (i = 0; i < nr_integers; i++)
-		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
-	kfree(answers);
-
-	question = "12 35 abc 46";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
-	for (i = 0; i < 2; i++)
-		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
-	kfree(answers);
-
-	question = "";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
-	kfree(answers);
-
-	question = "\n";
-	answers = str_to_ints(question, strlen(question), &nr_integers);
-	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
-	kfree(answers);
-}
-
-static void damon_dbgfs_test_set_targets(struct kunit *test)
-{
-	struct damon_ctx *ctx = dbgfs_new_ctx();
-	char buf[64];
-
-	if (!damon_is_registered_ops(DAMON_OPS_PADDR)) {
-		dbgfs_destroy_ctx(ctx);
-		kunit_skip(test, "PADDR not registered");
-	}
-
-	/* Make DAMON consider target has no pid */
-	damon_select_ops(ctx, DAMON_OPS_PADDR);
-
-	dbgfs_set_targets(ctx, 0, NULL);
-	sprint_target_ids(ctx, buf, 64);
-	KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
-
-	dbgfs_set_targets(ctx, 1, NULL);
-	sprint_target_ids(ctx, buf, 64);
-	KUNIT_EXPECT_STREQ(test, (char *)buf, "42\n");
-
-	dbgfs_set_targets(ctx, 0, NULL);
-	sprint_target_ids(ctx, buf, 64);
-	KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
-
-	dbgfs_destroy_ctx(ctx);
-}
-
-static void damon_dbgfs_test_set_init_regions(struct kunit *test)
-{
-	struct damon_ctx *ctx = damon_new_ctx();
-	/* Each line represents one region in ``<target idx> <start> <end>`` */
-	char * const valid_inputs[] = {"1 10 20\n 1   20 30\n1 35 45",
-		"1 10 20\n",
-		"1 10 20\n0 39 59\n0 70 134\n  1  20 25\n",
-		""};
-	/* Reading the file again will show sorted, clean output */
-	char * const valid_expects[] = {"1 10 20\n1 20 30\n1 35 45\n",
-		"1 10 20\n",
-		"0 39 59\n0 70 134\n1 10 20\n1 20 25\n",
-		""};
-	char * const invalid_inputs[] = {"3 10 20\n",	/* target not exists */
-		"1 10 20\n 1 14 26\n",		/* regions overlap */
-		"0 10 20\n1 30 40\n 0 5 8"};	/* not sorted by address */
-	char *input, *expect;
-	int i, rc;
-	char buf[256];
-
-	if (!damon_is_registered_ops(DAMON_OPS_PADDR)) {
-		damon_destroy_ctx(ctx);
-		kunit_skip(test, "PADDR not registered");
-	}
-
-	damon_select_ops(ctx, DAMON_OPS_PADDR);
-
-	dbgfs_set_targets(ctx, 3, NULL);
-
-	/* Put valid inputs and check the results */
-	for (i = 0; i < ARRAY_SIZE(valid_inputs); i++) {
-		input = valid_inputs[i];
-		expect = valid_expects[i];
-
-		rc = set_init_regions(ctx, input, strnlen(input, 256));
-		KUNIT_EXPECT_EQ(test, rc, 0);
-
-		memset(buf, 0, 256);
-		sprint_init_regions(ctx, buf, 256);
-
-		KUNIT_EXPECT_STREQ(test, (char *)buf, expect);
-	}
-	/* Put invalid inputs and check the return error code */
-	for (i = 0; i < ARRAY_SIZE(invalid_inputs); i++) {
-		input = invalid_inputs[i];
-		pr_info("input: %s\n", input);
-		rc = set_init_regions(ctx, input, strnlen(input, 256));
-		KUNIT_EXPECT_EQ(test, rc, -EINVAL);
-
-		memset(buf, 0, 256);
-		sprint_init_regions(ctx, buf, 256);
-
-		KUNIT_EXPECT_STREQ(test, (char *)buf, "");
-	}
-
-	dbgfs_set_targets(ctx, 0, NULL);
-	damon_destroy_ctx(ctx);
-}
-
-static struct kunit_case damon_test_cases[] = {
-	KUNIT_CASE(damon_dbgfs_test_str_to_ints),
-	KUNIT_CASE(damon_dbgfs_test_set_targets),
-	KUNIT_CASE(damon_dbgfs_test_set_init_regions),
-	{},
-};
-
-static struct kunit_suite damon_test_suite = {
-	.name = "damon-dbgfs",
-	.test_cases = damon_test_cases,
-};
-kunit_test_suite(damon_test_suite);
-
-#endif /* _DAMON_DBGFS_TEST_H */
-
-#endif	/* CONFIG_DAMON_KUNIT_TEST */