From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next 1/1] skbuff: Extend gso_type to unsigned int.
Date: Wed, 05 Apr 2017 06:34:26 -0700 (PDT)
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From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Mon, 3 Apr 2017 10:15:52 +0200

> diff --git a/net/core/skbuff.c b/net/core/skbuff.c
> index 9f78109..8796b93 100644
> --- a/net/core/skbuff.c
> +++ b/net/core/skbuff.c
> @@ -257,7 +257,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
>  
>  	/* make sure we initialize shinfo sequentially */
>  	shinfo = skb_shinfo(skb);
> -	memset(shinfo, 0, offsetof(struct skb_shared_info, dataref));
> +	memset(shinfo, 0, offsetof(struct skb_shared_info, _unused));
>  	atomic_set(&shinfo->dataref, 1);
>  	kmemcheck_annotate_variable(shinfo->destructor_arg);
>  

There is another memset() that needs this conversion in __build_skb().