From: David Miller <davem@davemloft.net>
Date: Mon, 25 Jul 2011 00:01:17 +0000 (+0000)
Subject: neigh: Create mechanism for generic neigh private areas.
X-Git-Tag: next-20111202~50^2~25
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1026fec8739663621d64216ba939c23bc1d089b7;p=karo-tx-linux.git

neigh: Create mechanism for generic neigh private areas.

The implementation private sits right after the primary_key memory.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 7ae5acff96e9..87c0e5ce6492 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -179,6 +179,13 @@ struct neigh_table {
 	struct pneigh_entry	**phash_buckets;
 };
 
+#define NEIGH_PRIV_ALIGN	sizeof(long long)
+
+static inline void *neighbour_priv(const struct neighbour *n)
+{
+	return (char *)n + ALIGN(sizeof(*n) + n->tbl->key_len, NEIGH_PRIV_ALIGN);
+}
+
 /* flags for neigh_update() */
 #define NEIGH_UPDATE_F_OVERRIDE			0x00000001
 #define NEIGH_UPDATE_F_WEAK_OVERRIDE		0x00000002