1 #include <linux/sort.h> 2 #include <linux/slab.h> 3 #include <linux/module.h> 4 5 /* a simple boot-time regression test */ 6 7 #define TEST_LEN 1000 8 9 static int __init cmpint(const void *a, const void *b) 10 { 11 return *(int *)a - *(int *)b; 12 } 13 14 static int __init test_sort_init(void) 15 { 16 int *a, i, r = 1, err = -ENOMEM; 17 18 a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL); 19 if (!a) 20 return err; 21 22 for (i = 0; i < TEST_LEN; i++) { 23 r = (r * 725861) % 6599; 24 a[i] = r; 25 } 26 27 sort(a, TEST_LEN, sizeof(*a), cmpint, NULL); 28 29 err = -EINVAL; 30 for (i = 0; i < TEST_LEN-1; i++) 31 if (a[i] > a[i+1]) { 32 pr_err("test has failed\n"); 33 goto exit; 34 } 35 err = 0; 36 pr_info("test passed\n"); 37 exit: 38 kfree(a); 39 return err; 40 } 41 42 module_init(test_sort_init); 43 MODULE_LICENSE("GPL"); 44