disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/net/ip_tunnels.h
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@@ -378,9 +378,11 @@
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 static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph,
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 				       const struct sk_buff *skb)
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 {
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-	if (skb->protocol == htons(ETH_P_IP))
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+	__be16 payload_protocol = skb_protocol(skb, true);
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+
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+	if (payload_protocol == htons(ETH_P_IP))
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 		return iph->tos;
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-	else if (skb->protocol == htons(ETH_P_IPV6))
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+	else if (payload_protocol == htons(ETH_P_IPV6))
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 		return ipv6_get_dsfield((const struct ipv6hdr *)iph);
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 	else
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 		return 0;
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@@ -389,9 +391,11 @@
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 static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph,
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 				       const struct sk_buff *skb)
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 {
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-	if (skb->protocol == htons(ETH_P_IP))
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+	__be16 payload_protocol = skb_protocol(skb, true);
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+
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+	if (payload_protocol == htons(ETH_P_IP))
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 		return iph->ttl;
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-	else if (skb->protocol == htons(ETH_P_IPV6))
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+	else if (payload_protocol == htons(ETH_P_IPV6))
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 		return ((const struct ipv6hdr *)iph)->hop_limit;
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 	else
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 		return 0;