#define LIST_ENTRY(__type, __item, __field) \
((__type *)(((char *)(__item)) - offsetof(__type, __field)))
+#define LIST_FIRST_ENTRY(__ptr, __type, __field) \
+ LIST_ENTRY(__type, (__ptr)->next, __field)
+
+#define LIST_LAST_ENTRY(__ptr, __type, __field) \
+ LIST_ENTRY(__type, (__ptr)->prev, __field)
+
#define LIST_IS_EMPTY(__list) \
((__list)->next == (__list))