diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 329de41..311bbd1 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -183,7 +183,7 @@
 	struct timer_list	timer;
 
 	/* Last used time */
-	u64			lastused;
+	unsigned long		lastused;
 
 	/* Reference to data common to all the instances of this
 	 * transformer. */
diff --git a/net/ipv6/xfrm6_mode_ro.c b/net/ipv6/xfrm6_mode_ro.c
index 4a01cb3..63d5d49 100644
--- a/net/ipv6/xfrm6_mode_ro.c
+++ b/net/ipv6/xfrm6_mode_ro.c
@@ -54,9 +54,7 @@
 	__skb_pull(skb, hdr_len);
 	memmove(ipv6_hdr(skb), iph, hdr_len);
 
-	spin_lock_bh(&x->lock);
 	x->lastused = get_seconds();
-	spin_unlock_bh(&x->lock);
 
 	return 0;
 }
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index c4f6419..6424e53 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1986,8 +1986,8 @@
 	if (x->coaddr)
 		l += nla_total_size(sizeof(*x->coaddr));
 
-	/* Must count this as this may become non-zero behind our back. */
-	l += nla_total_size(sizeof(x->lastused));
+	/* Must count x->lastused as it may become non-zero behind our back. */
+	l += nla_total_size(sizeof(u64));
 
 	return l;
 }