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1// SPDX-License-Identifier: GPL-2.0-only2 3#include <kunit/test.h>4 5#include <linux/sort.h>6#include <linux/slab.h>7#include <linux/module.h>8 9/* a simple boot-time regression test */10 11#define TEST_LEN 100012 13static int cmpint(const void *a, const void *b)14{15 return *(int *)a - *(int *)b;16}17 18static void test_sort(struct kunit *test)19{20 int *a, i, r = 1;21 22 a = kunit_kmalloc_array(test, TEST_LEN, sizeof(*a), GFP_KERNEL);23 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, a);24 25 for (i = 0; i < TEST_LEN; i++) {26 r = (r * 725861) % 6599;27 a[i] = r;28 }29 30 sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);31 32 for (i = 0; i < TEST_LEN - 1; i++)33 KUNIT_ASSERT_LE(test, a[i], a[i + 1]);34 35 r = 48;36 37 for (i = 0; i < TEST_LEN - 1; i++) {38 r = (r * 725861) % 6599;39 a[i] = r;40 }41 42 sort(a, TEST_LEN - 1, sizeof(*a), cmpint, NULL);43 44 for (i = 0; i < TEST_LEN - 2; i++)45 KUNIT_ASSERT_LE(test, a[i], a[i + 1]);46}47 48static struct kunit_case sort_test_cases[] = {49 KUNIT_CASE(test_sort),50 {}51};52 53static struct kunit_suite sort_test_suite = {54 .name = "lib_sort",55 .test_cases = sort_test_cases,56};57 58kunit_test_suites(&sort_test_suite);59 60MODULE_DESCRIPTION("sort() KUnit test suite");61MODULE_LICENSE("GPL");62