[RTNETLINK]: Fix rtnetlink compat attribute patch

[~andy/linux] / include / linux / rtnetlink.h

diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 6731e7f4cc0fea2900c66f3ced8992ebdf6f7eea..c91476ce314ac32853cd8cac29859ad3790ee975 100644 (file)
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -570,12 +570,16 @@ static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 }
 
 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
-extern int rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
-                                     struct rtattr *rta, void **data, int len);
+extern int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
+                                       struct rtattr *rta, int len);
 
 #define rtattr_parse_nested(tb, max, rta) \
        rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 
+#define rtattr_parse_nested_compat(tb, max, rta, data, len) \
+({     data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
+       __rtattr_parse_nested_compat(tb, max, rta, len); })
+
 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 extern int rtnl_unicast(struct sk_buff *skb, u32 pid);
 extern int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,