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It can only return 0 (success) or -ENOMEM. Change return value to a pointer to secpath struct. This avoids direct access to skb->sp: err = secpath_set(skb); if (!err) .. skb->sp-> ... Becomes: sp = secpath_set(skb) if (!sp) .. sp-> .. This reduces noise in followup patch which is going to remove skb->sp. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>