summaryrefslogtreecommitdiffstats
path: root/lib/test_sort.c
blob: 52edbe10f2e513e45b01bf84d6e00fa6790de7b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/sort.h>
#include <linux/slab.h>
#include <linux/module.h>

/* a simple boot-time regression test */

#define TEST_LEN 1000

static int __init cmpint(const void *a, const void *b)
{
	return *(int *)a - *(int *)b;
}

static int __init test_sort_init(void)
{
	int *a, i, r = 1, err = -ENOMEM;

	a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL);
	if (!a)
		return err;

	for (i = 0; i < TEST_LEN; i++) {
		r = (r * 725861) % 6599;
		a[i] = r;
	}

	sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);

	err = -EINVAL;
	for (i = 0; i < TEST_LEN-1; i++)
		if (a[i] > a[i+1]) {
			pr_err("test has failed\n");
			goto exit;
		}
	err = 0;
	pr_info("test passed\n");
exit:
	kfree(a);
	return err;
}

static void __exit test_sort_exit(void)
{
}

module_init(test_sort_init);
module_exit(test_sort_exit);

MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud