1 files changed, 4 insertions, 6 deletions

diff --git a/include/net/netlink.h b/include/net/netlink.h
index 64158353ecb2..e010ee8da41d 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -490,14 +490,10 @@ static inline struct sk_buff *nlmsg_new(size_t payload, gfp_t flags)
  * Corrects the netlink message header to include the appeneded
  * attributes. Only necessary if attributes have been added to
  * the message.
- *
- * Returns the total data length of the skb.
  */
-static inline int nlmsg_end(struct sk_buff *skb, struct nlmsghdr *nlh)
+static inline void nlmsg_end(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
         nlh->nlmsg_len = skb_tail_pointer(skb) - (unsigned char *)nlh;
-
-        return skb->len;
 }
 
 /**
@@ -520,8 +516,10 @@ static inline void *nlmsg_get_pos(struct sk_buff *skb)
  */
 static inline void nlmsg_trim(struct sk_buff *skb, const void *mark)
 {
-        if (mark)
+        if (mark) {
+                WARN_ON((unsigned char *) mark < skb->data);
                 skb_trim(skb, (unsigned char *) mark - skb->data);
+        }
 }
 
 /**