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-rw-r--r--lib/list_sort.c65
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 */