+static void *corrupt(const char *abortstr,
+ const struct list_node *head,
+ const struct list_node *node,
+ unsigned int count)
+{
+ if (abortstr) {
+ fprintf(stderr,
+ "%s: prev corrupt in node %p (%u) of %p\n",
+ abortstr, node, count, head);
+ abort();
+ }
+ return NULL;
+}
+