lib: list_sort_test(): add extra corruption check

Add a check to make sure that the prev pointer of the list head points
to the last element on the list.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Don Mullis <don.mullis@gmail.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/list_sort.c b/lib/list_sort.c
index 291412ade89a7c39acc4d03705de59488b761860..fbdbc867b252dd7dd1ffaf79c1a2a58d31461d70 100644 (file)
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -272,6 +272,11 @@ static int __init list_sort_test(void)
                }
                count++;
        }
+       if (head.prev != cur) {
+               printk(KERN_ERR "list_sort_test: error: list is corrupted\n");
+               goto exit;
+       }
+
 
        if (count != TEST_LIST_LEN) {
                printk(KERN_ERR "list_sort_test: error: bad list length %d",