Add list iterators over list elements
Address the comments from armink@rt-thread
@@ -278,7 +278,7 @@ rt_inline int rt_slist_isempty(rt_slist_t *l)
* @head: the head for your single list.
*/
#define rt_slist_for_each(pos, head) \
- for (pos = (head)->next; &pos->next != (head); pos = pos->next)
+ for (pos = (head)->next; pos != RT_NULL; pos = pos->next)
/**
* rt_slist_for_each_entry - iterate over single list of given type
