1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index b043c60429bd..6b793bfc0e10 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -811,11 +811,10 @@ static struct pernet_operations inet6_net_ops = {
 
 static int __init inet6_init(void)
 {
-        struct sk_buff *dummy_skb;
         struct list_head *r;
         int err = 0;
 
-        BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
+        BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
 
         /* Register the socket-side information for inet6_create.  */
         for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)