netdev - [PATCH net-next 01/12] net: add dst_get_noref and refdst

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Date:	Wed,  6 Mar 2013 10:42:11 +0200
From:	Julian Anastasov <ja@....bg>
To:	Simon Horman <horms@...ge.net.au>
Cc:	lvs-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 01/12] net: add dst_get_noref and refdst_ptr helpers

	Needed to hide refdst details.

Signed-off-by: Julian Anastasov <ja@....bg>
---
 include/net/dst.h |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/include/net/dst.h b/include/net/dst.h
index 853cda1..967f42a 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -264,10 +264,22 @@ static inline struct dst_entry *dst_clone(struct dst_entry *dst)
 
 extern void dst_release(struct dst_entry *dst);
 
+/* Get noref version of dst */
+static inline struct dst_entry *dst_get_noref(struct dst_entry *dst)
+{
+	return (struct dst_entry *) ((unsigned long) dst | SKB_DST_NOREF);
+}
+
+/* Return dst pointer from refdst */
+static inline struct dst_entry *refdst_ptr(unsigned long refdst)
+{
+	return (struct dst_entry *)(refdst & SKB_DST_PTRMASK);
+}
+
 static inline void refdst_drop(unsigned long refdst)
 {
 	if (!(refdst & SKB_DST_NOREF))
-		dst_release((struct dst_entry *)(refdst & SKB_DST_PTRMASK));
+		dst_release(refdst_ptr(refdst));
 }
 
 /**
-- 
1.7.3.4

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