[PATCH] list_for_each_entry

This adds list_for_each_entry, which is the equivalent of list_for_each
and list_entry, except only one variable is needed.

include/linux/list.h

@@ -211,6 +211,19 @@ static inline void list_splice_init(list_t *list, list_t *head)
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, n = pos->next)
 
+/**
+ * list_for_each_entry	-	iterate over list of given type
+ * @pos:	the type * to use as a loop counter.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry(pos, head, member)				\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		     prefetch(pos->member.next);			\
+	     &pos->member != (head); 					\
+	     pos = list_entry(pos->member.next, typeof(*pos), member),	\
+		     prefetch(pos->member.next))
+
 #endif /* __KERNEL__ || _LVM_H_INCLUDE */
 
 #endif