[PATCH bpf-next 1/7] dst: Move skb_dst_drop to skbuff.c

[Joe Stringer <joe@xxxxxxxxxxx>]

Prepare for extending this function to handle dst_sk_prefetch by moving
it away from the generic dst header and into the skbuff code.

Signed-off-by: Joe Stringer <joe@xxxxxxxxxxx>
---
 include/linux/skbuff.h |  1 +
 include/net/dst.h      | 14 --------------
 net/core/skbuff.c      | 15 +++++++++++++++
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 21749b2cdc9b..860cee22c49b 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1047,6 +1047,7 @@ static inline bool skb_unref(struct sk_buff *skb)
 	return true;
 }
 
+void skb_dst_drop(struct sk_buff *skb);
 void skb_release_head_state(struct sk_buff *skb);
 void kfree_skb(struct sk_buff *skb);
 void kfree_skb_list(struct sk_buff *segs);
diff --git a/include/net/dst.h b/include/net/dst.h
index 3448cf865ede..b6a2ecab53ce 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -259,20 +259,6 @@ static inline void refdst_drop(unsigned long refdst)
 		dst_release((struct dst_entry *)(refdst & SKB_DST_PTRMASK));
 }
 
-/**
- * skb_dst_drop - drops skb dst
- * @skb: buffer
- *
- * Drops dst reference count if a reference was taken.
- */
-static inline void skb_dst_drop(struct sk_buff *skb)
-{
-	if (skb->_skb_refdst) {
-		refdst_drop(skb->_skb_refdst);
-		skb->_skb_refdst = 0UL;
-	}
-}
-
 static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
 {
 	nskb->_skb_refdst = refdst;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e1101a4f90a6..6b2798450fd4 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1034,6 +1034,21 @@ struct sk_buff *alloc_skb_for_msg(struct sk_buff *first)
 }
 EXPORT_SYMBOL_GPL(alloc_skb_for_msg);
 
+/**
+ * skb_dst_drop - drops skb dst
+ * @skb: buffer
+ *
+ * Drops dst reference count if a reference was taken.
+ */
+void skb_dst_drop(struct sk_buff *skb)
+{
+	if (skb->_skb_refdst) {
+		refdst_drop(skb->_skb_refdst);
+		skb->_skb_refdst = 0UL;
+	}
+}
+EXPORT_SYMBOL_GPL(skb_dst_drop);
+
 /**
  *	skb_morph	-	morph one skb into another
  *	@dst: the skb to receive the contents
-- 
2.20.1