enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/include/net/garp.h
..
..
@@ -37,7 +37,7 @@
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 static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
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 {
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 	BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
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-		     FIELD_SIZEOF(struct sk_buff, cb));
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+		     sizeof_field(struct sk_buff, cb));
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 	return (struct garp_skb_cb *)skb->cb;
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 }
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