!list_entry_is_head(pos, head, member); \
pos = list_prev_entry(pos, member))
+/**
+ * list_for_each_entry_direction - iterate forward/backward over list of given type
+ * @param forward the iterate direction, true for forward, false for backward.
+ * @param pos the type * to use as a loop cursor.
+ * @param head the head for your list.
+ * @param member the name of the list_head within the struct.
+ */
+#define list_for_each_entry_direction(forward, pos, head, member) \
+ for (pos = forward ? list_first_entry(head, typeof(*pos), member) \
+ : list_last_entry(head, typeof(*pos), member); \
+ !list_entry_is_head(pos, head, member); \
+ pos = forward ? list_next_entry(pos, member) \
+ : list_prev_entry(pos, member))
+
/**
* list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue()
* @param pos the type * to use as a start point