[NET]: Store skb->timestamp as offset to a base timestamp

Reduces skb size by 8 bytes on 64-bit.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 199d374..05fe2e7 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -584,13 +584,16 @@
 		/* possibly an icmp error */
 		dprintk("svc: recvfrom returned error %d\n", -err);
 	}
-	if (skb->stamp.tv_sec == 0) {
-		skb->stamp.tv_sec = xtime.tv_sec; 
-		skb->stamp.tv_usec = xtime.tv_nsec / NSEC_PER_USEC; 
+	if (skb->tstamp.off_sec == 0) {
+		struct timeval tv;
+
+		tv.tv_sec = xtime.tv_sec;
+		tv.tv_usec = xtime.tv_nsec * 1000;
+		skb_set_timestamp(skb, &tv);
 		/* Don't enable netstamp, sunrpc doesn't 
 		   need that much accuracy */
 	}
-	svsk->sk_sk->sk_stamp = skb->stamp;
+	skb_get_timestamp(skb, &svsk->sk_sk->sk_stamp);
 	set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */
 
 	/*