net: reduce structures when XFRM=n

ifdef out
* struct sk_buff::sp		(pointer)
* struct dst_entry::xfrm	(pointer)
* struct sock::sk_policy	(2 pointers)

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 1 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 2725f4e5a9bf..487e34507b41 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -269,8 +269,9 @@ struct sk_buff {
                 struct  dst_entry       *dst;
                 struct  rtable          *rtable;
         };
+#ifdef CONFIG_XFRM
         struct  sec_path        *sp;
-
+#endif
         /*
          * This is the control buffer. It is free to use for every
          * layer. Please put your private variables there. If you
@@ -1864,6 +1865,18 @@ static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_bu
         to->queue_mapping = from->queue_mapping;
 }
 
+#ifdef CONFIG_XFRM
+static inline struct sec_path *skb_sec_path(struct sk_buff *skb)
+{
+        return skb->sp;
+}
+#else
+static inline struct sec_path *skb_sec_path(struct sk_buff *skb)
+{
+        return NULL;
+}
+#endif
+
 static inline int skb_is_gso(const struct sk_buff *skb)
 {
         return skb_shinfo(skb)->gso_size;