unix: Use FIELD_SIZEOF() in af_unix_init().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 5b5c876c80e9b543bd7b773c1a1f45f83f696e7b..0c612361c1534fa3edaaa0961873f2351371ee5e 100644 (file)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2426,9 +2426,8 @@ static struct pernet_operations unix_net_ops = {
 static int __init af_unix_init(void)
 {
        int rc = -1;
-       struct sk_buff *dummy_skb;
 
-       BUILD_BUG_ON(sizeof(struct unix_skb_parms) > sizeof(dummy_skb->cb));
+       BUILD_BUG_ON(sizeof(struct unix_skb_parms) > FIELD_SIZEOF(struct sk_buff, cb));
 
        rc = proto_register(&unix_proto, 1);
        if (rc != 0) {