diff options
| author | David S. Miller <davem@davemloft.net> | 2011-07-14 07:53:20 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-14 07:53:20 -0700 |
| commit | f6b72b6217f8c24f2a54988e58af858b4e66024d (patch) | |
| tree | c59d5adcf9bb226db6f602c5078106052524cfea /include/linux/netdevice.h | |
| parent | 390fd0b388e4f85549e5d60bdeb21364b344d9b9 (diff) | |
net: Embed hh_cache inside of struct neighbour.
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>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 75382378a1ba..5ccc0cb8352b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -252,14 +252,7 @@ struct netdev_hw_addr_list { netdev_hw_addr_list_for_each(ha, &(dev)->mc) struct hh_cache { - atomic_t hh_refcnt; /* number of users */ -/* - * We want hh_output, hh_len, hh_lock and hh_data be a in a separate - * cache line on SMP. - * They are mostly read, but hh_refcnt may be changed quite frequently, - * incurring cache line ping pongs. - */ - u16 hh_len ____cacheline_aligned_in_smp; + u16 hh_len; u16 __pad; int (*hh_output)(struct sk_buff *skb); seqlock_t hh_lock; @@ -273,12 +266,6 @@ struct hh_cache { unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; }; -static inline void hh_cache_put(struct hh_cache *hh) -{ - if (atomic_dec_and_test(&hh->hh_refcnt)) - kfree(hh); -} - /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. * Alternative is: * dev->hard_header_len ? (dev->hard_header_len + |