Subject: Re: [PATCH 2/3] netlink: Remove an unused pointer in netlink_skb_parms

From: ebiederm-aS9lmoZGLiVWk0Htik3J/[email-masked] (Eric W. Biederman)
Date: Wed, 20 Mar 2013 23:36:24 -0700

net/ipv4/inet_diag.c:			   sk_user_ns(NETLINK_CB(in_skb).ssk),
net/ipv4/inet_diag.c:				  sk_user_ns(NETLINK_CB(cb->skb).ssk),
net/ipv4/inet_diag.c:					       sk_user_ns(NETLINK_CB(cb->skb).ssk),
net/ipv4/udp_diag.c:			sk_user_ns(NETLINK_CB(cb->skb).ssk),
net/ipv4/udp_diag.c:			   sk_user_ns(NETLINK_CB(in_skb).ssk),
net/netfilter/nfnetlink_log.c:					       sk_user_ns(NETLINK_CB(skb).ssk));
net/netlink/af_netlink.c:		NETLINK_CB(skb).ssk = ssk;
net/sched/cls_flow.c:		    sk_user_ns(NETLINK_CB(in_skb).ssk) != &init_user_ns)

I count 8 uses.

Eric

>
> diff --git a/include/linux/netlink.h b/include/linux/netlink.h
> index e0f746b..9ac1201 100644
> --- a/include/linux/netlink.h
> +++ b/include/linux/netlink.h
> @@ -19,7 +19,6 @@ struct netlink_skb_parms {
>  	struct scm_creds	creds;		/* Skb credentials	*/
>  	__u32			portid;
>  	__u32			dst_group;
> -	struct sock		*ssk;
>  };
>  
>  #define NETLINK_CB(skb)		(*(struct netlink_skb_parms*)&((skb)->cb))