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lib/test_sort.c 754 Bytes
81f7e3824   Eric Lee   Initial Release, ...
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  #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
  ");
  			goto exit;
  		}
  	err = 0;
  	pr_info("test passed
  ");
  exit:
  	kfree(a);
  	return err;
  }
  
  module_init(test_sort_init);
  MODULE_LICENSE("GPL");