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net: Embed hh_cache inside of struct neighbour.

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Now that there is a one-to-one correspondance between neighbour
and hh_cache entries, we no longer need:

1) dynamic allocation
2) attachment to dst->hh
3) refcounting

Initialization of the hh_cache entry is indicated by hh_len
being non-zero, and such initialization is always done with
the neighbour's lock held as a writer.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-07-14 07:53:20 -07:00
parent 390fd0b388
commit f6b72b6217
9 changed files with 59 additions and 105 deletions
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2
include/net/neighbour.h
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@ -108,7 +108,7 @@ struct neighbour {
__u8 dead;
seqlock_t ha_lock;
unsigned char ha[ALIGN(MAX_ADDR_LEN, sizeof(unsigned long))];
struct hh_cache *hh;
struct hh_cache hh;
int (*output)(struct sk_buff *skb);
const struct neigh_ops *ops;
struct rcu_head rcu;