1 #include <linux/sort.h> 2 #include <linux/slab.h> 3 #include <linux/init.h> 4 5 /* 6 * A simple boot-time regression test 7 * License: GPL 8 */ 9 10 #define TEST_LEN 1000 11 12 static int __init cmpint(const void *a, const void *b) 13 { 14 return *(int *)a - *(int *)b; 15 } 16 17 static int __init test_sort_init(void) 18 { 19 int *a, i, r = 1, err = -ENOMEM; 20 21 a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL); 22 if (!a) 23 return err; 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 err = -EINVAL; 33 for (i = 0; i < TEST_LEN-1; i++) 34 if (a[i] > a[i+1]) { 35 pr_err("test has failed\n"); 36 goto exit; 37 } 38 err = 0; 39 pr_info("test passed\n"); 40 exit: 41 kfree(a); 42 return err; 43 } 44 subsys_initcall(test_sort_init); 45