ipv4: Use FIELD_SIZEOF() in inet_init().

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

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 24b384b7903ea7a59a11e7a4cbf06db996498924..4fdf96710d45b16008653c7694ce0e5cae6bde03 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1705,12 +1705,11 @@ static struct packet_type ip_packet_type __read_mostly = {
 
 static int __init inet_init(void)
 {
-       struct sk_buff *dummy_skb;
        struct inet_protosw *q;
        struct list_head *r;
        int rc = -EINVAL;
 
-       BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb));
+       BUILD_BUG_ON(sizeof(struct inet_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
 
        sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
        if (!sysctl_local_reserved_ports)