* data
* data to insert into list
*/
-extern void listnode_delete(struct list *list, void *data);
+extern void listnode_delete(struct list *list, const void *data);
/*
* Find the listnode corresponding to an element in a list.
* Returns:
* pointer to listnode storing the given data if found, NULL otherwise
*/
-extern struct listnode *listnode_lookup(struct list *list, void *data);
+extern struct listnode *listnode_lookup(struct list *list, const void *data);
/*
* Retrieve the element at the head of a list.
* list
* list to operate on
* cond
- * function pointer which takes node data as input and return TRUE or FALSE
+ * function pointer which takes node data as input and return true or false
*/
extern void list_filter_out_nodes(struct list *list, bool (*cond)(void *data));