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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * KUnit compilation/smoke test for Private list primitives.
4 *
5 * Copyright (c) 2025, Google LLC.
6 * Pasha Tatashin <pasha.tatashin@soleen.com>
7 */
8#include <linux/list_private.h>
9#include <kunit/test.h>
10
11/*
12 * This forces compiler to warn if you access it directly, because list
13 * primitives expect (struct list_head *), not (volatile struct list_head *).
14 */
15#undef __private
16#define __private volatile
17
18/* Redefine ACCESS_PRIVATE for this test. */
19#undef ACCESS_PRIVATE
20#define ACCESS_PRIVATE(p, member) \
21 (*((struct list_head *)((unsigned long)&((p)->member))))
22
23struct list_test_struct {
24 int data;
25 struct list_head __private list;
26};
27
28static void list_private_compile_test(struct kunit *test)
29{
30 struct list_test_struct entry;
31 struct list_test_struct *pos, *n;
32 LIST_HEAD(head);
33
34 INIT_LIST_HEAD(&ACCESS_PRIVATE(&entry, list));
35 list_add(&ACCESS_PRIVATE(&entry, list), &head);
36 pos = &entry;
37
38 pos = list_private_entry(&ACCESS_PRIVATE(&entry, list), struct list_test_struct, list);
39 pos = list_private_first_entry(&head, struct list_test_struct, list);
40 pos = list_private_last_entry(&head, struct list_test_struct, list);
41 pos = list_private_next_entry(pos, list);
42 pos = list_private_prev_entry(pos, list);
43 pos = list_private_next_entry_circular(pos, &head, list);
44 pos = list_private_prev_entry_circular(pos, &head, list);
45
46 if (list_private_entry_is_head(pos, &head, list))
47 return;
48
49 list_private_for_each_entry(pos, &head, list) { }
50 list_private_for_each_entry_reverse(pos, &head, list) { }
51 list_private_for_each_entry_continue(pos, &head, list) { }
52 list_private_for_each_entry_continue_reverse(pos, &head, list) { }
53 list_private_for_each_entry_from(pos, &head, list) { }
54 list_private_for_each_entry_from_reverse(pos, &head, list) { }
55
56 list_private_for_each_entry_safe(pos, n, &head, list)
57 list_private_safe_reset_next(pos, n, list);
58 list_private_for_each_entry_safe_continue(pos, n, &head, list) { }
59 list_private_for_each_entry_safe_from(pos, n, &head, list) { }
60 list_private_for_each_entry_safe_reverse(pos, n, &head, list) { }
61}
62
63static struct kunit_case list_private_test_cases[] = {
64 KUNIT_CASE(list_private_compile_test),
65 {},
66};
67
68static struct kunit_suite list_private_test_module = {
69 .name = "list-private-kunit-test",
70 .test_cases = list_private_test_cases,
71};
72
73kunit_test_suite(list_private_test_module);
74
75MODULE_DESCRIPTION("KUnit compilation test for private list primitives");
76MODULE_LICENSE("GPL");