[LIST]: Introduce list_for_each_entry_safe_continue

Used in the dccp CCID3 code, that is going to be submitted RSN.

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/list.h b/include/linux/list.h
index aab2db2..597094e 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -419,6 +419,19 @@
 	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
 
 /**
+ * list_for_each_entry_safe_continue -	iterate over list of given type
+ *			continuing after existing point safe against removal of list entry
+ * @pos:	the type * to use as a loop counter.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe_continue(pos, n, head, member) 		\
+	for (pos = n, n = list_entry(n->member.next, typeof(*n), member);	\
+	     &pos->member != (head);						\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
  * list_for_each_rcu	-	iterate over an rcu-protected list
  * @pos:	the &struct list_head to use as a loop counter.
  * @head:	the head for your list.