net neigh: RCU conversion of neigh hash table
David
This is the first step for RCU conversion of neigh code.
Next patches will convert hash_buckets[] and "struct neighbour" to RCU
protected objects.
Thanks
[PATCH net-next] net neigh: RCU conversion of neigh hash table
Instead of storing hash_buckets, hash_mask and hash_rnd in "struct
neigh_table", a new structure is defined :
struct neigh_hash_table {
struct neighbour **hash_buckets;
unsigned int hash_mask;
__u32 hash_rnd;
struct rcu_head rcu;
};
And "struct neigh_table" has an RCU protected pointer to such a
neigh_hash_table.
This means the signature of (*hash)() function changed: We need to add a
third parameter with the actual hash_rnd value, since this is not
anymore a neigh_table field.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/atm/clip.c b/net/atm/clip.c
index 95fdd11..ff956d1 100644
--- a/net/atm/clip.c
+++ b/net/atm/clip.c
@@ -310,9 +310,9 @@
return 0;
}
-static u32 clip_hash(const void *pkey, const struct net_device *dev)
+static u32 clip_hash(const void *pkey, const struct net_device *dev, __u32 rnd)
{
- return jhash_2words(*(u32 *) pkey, dev->ifindex, clip_tbl.hash_rnd);
+ return jhash_2words(*(u32 *) pkey, dev->ifindex, rnd);
}
static struct neigh_table clip_tbl = {