netlink: Use FIELD_SIZEOF() in netlink_proto_init().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index c0353d5..74827e3 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2185,7 +2185,6 @@
static int __init netlink_proto_init(void)
{
- struct sk_buff *dummy_skb;
int i;
unsigned long limit;
unsigned int order;
@@ -2194,7 +2193,7 @@
if (err != 0)
goto out;
- BUILD_BUG_ON(sizeof(struct netlink_skb_parms) > sizeof(dummy_skb->cb));
+ BUILD_BUG_ON(sizeof(struct netlink_skb_parms) > FIELD_SIZEOF(struct sk_buff, cb));
nl_table = kcalloc(MAX_LINKS, sizeof(*nl_table), GFP_KERNEL);
if (!nl_table)