diff options
| -rw-r--r-- | lib/list_sort.c | 65 |
1 files changed, 38 insertions, 27 deletions
diff --git a/lib/list_sort.c b/lib/list_sort.c index 8f3c24415ae5..2b99ff80f4be 100644 --- a/lib/list_sort.c +++ b/lib/list_sort.c @@ -165,56 +165,67 @@ static int cmp(void *priv, struct list_head *a, struct list_head *b) static int __init list_sort_test(void) { - int i, count; - struct list_head *head = kmalloc(sizeof(*head), GFP_KERNEL); - struct list_head *cur; + int i, count = 1, err = -EINVAL; + struct debug_el *el; + struct list_head *cur, *tmp; + LIST_HEAD(head); printk(KERN_DEBUG "testing list_sort()\n"); - cur = head; for (i = 0; i < TEST_LIST_LEN; i++) { - struct debug_el *el = kmalloc(sizeof(*el), GFP_KERNEL); - BUG_ON(!el); + el = kmalloc(sizeof(*el), GFP_KERNEL); + if (!el) { + printk(KERN_ERR "cancel list_sort() testing - cannot " + "allocate memory\n"); + goto exit; + } /* force some equivalencies */ el->value = random32() % (TEST_LIST_LEN/3); el->serial = i; - - el->list.prev = cur; - cur->next = &el->list; - cur = cur->next; + list_add_tail(&el->list, &head); } - head->prev = cur; - list_sort(NULL, head, cmp); + list_sort(NULL, &head, cmp); + + for (cur = head.next; cur->next != &head; cur = cur->next) { + struct debug_el *el1; + int cmp_result; - count = 1; - for (cur = head->next; cur->next != head; cur = cur->next) { - struct debug_el *el = container_of(cur, struct debug_el, list); - int cmp_result = cmp(NULL, cur, cur->next); if (cur->next->prev != cur) { printk(KERN_ERR "list_sort() returned " "a corrupted list!\n"); - return 1; - } else if (cmp_result > 0) { + goto exit; + } + + cmp_result = cmp(NULL, cur, cur->next); + if (cmp_result > 0) { printk(KERN_ERR "list_sort() failed to sort!\n"); - return 1; - } else if (cmp_result == 0 && - el->serial >= container_of(cur->next, - struct debug_el, list)->serial) { + goto exit; + } + + el = container_of(cur, struct debug_el, list); + el1 = container_of(cur->next, struct debug_el, list); + if (cmp_result == 0 && el->serial >= el1->serial) { printk(KERN_ERR "list_sort() failed to preserve order " "of equivalent elements!\n"); - return 1; + goto exit; } - kfree(cur->prev); count++; } - kfree(cur); + if (count != TEST_LIST_LEN) { printk(KERN_ERR "list_sort() returned list of " "different length!\n"); - return 1; + goto exit; + } + + err = 0; +exit: + list_for_each_safe(cur, tmp, &head) { + list_del(cur); + kfree(container_of(cur, struct debug_el, list)); } - return 0; + return err; } module_init(list_sort_test); #endif /* CONFIG_TEST_LIST_SORT */ |