[NETLINK]: Use nlmsg_trim() where appropriate

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 80e6f81..6a762cf 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -65,6 +65,7 @@
 #include <linux/netdevice.h>
 #include <linux/rtnetlink.h>
 #include <linux/pkt_sched.h>
+#include <net/netlink.h>
 #include <net/pkt_sched.h>
 #include <net/pkt_cls.h>
 #include <asm/system.h>
@@ -1378,7 +1379,7 @@
 	return skb->len;
 
  rtattr_failure:
-	skb_trim(skb, b - skb->data);
+	nlmsg_trim(skb, b);
 	return -1;
 }
 
@@ -1584,7 +1585,7 @@
 	return skb->len;
 
  rtattr_failure:
-	skb_trim(skb, b - skb->data);
+	nlmsg_trim(skb, b);
 	return -1;
 }