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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2007-04-19 20:29:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:26:28 -0700 |
| commit | 27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 (patch) | |
| tree | 5a267e40f9b94014be38dad5de0a52b6628834e0 /drivers/net/ibm_emac | |
| parent | be8bd86321fa7f06359d866ef61fb4d2f3e9dce9 (diff) | |
| download | linux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.gz linux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.bz2 linux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.zip | |
[SK_BUFF]: Convert skb->tail to sk_buff_data_t
So that it is also an offset from skb->head, reduces its size from 8 to 4 bytes
on 64bit architectures, allowing us to combine the 4 bytes hole left by the
layer headers conversion, reducing struct sk_buff size to 256 bytes, i.e. 4
64byte cachelines, and since the sk_buff slab cache is SLAB_HWCACHE_ALIGN...
:-)
Many calculations that previously required that skb->{transport,network,
mac}_header be first converted to a pointer now can be done directly, being
meaningful as offsets or pointers.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ibm_emac')
| -rw-r--r-- | drivers/net/ibm_emac/ibm_emac_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ibm_emac/ibm_emac_core.c b/drivers/net/ibm_emac/ibm_emac_core.c index b1ad62d89eb9..3d82d46f4998 100644 --- a/drivers/net/ibm_emac/ibm_emac_core.c +++ b/drivers/net/ibm_emac/ibm_emac_core.c @@ -1338,7 +1338,7 @@ static inline int emac_rx_sg_append(struct ocp_enet_private *dev, int slot) dev_kfree_skb(dev->rx_sg_skb); dev->rx_sg_skb = NULL; } else { - cacheable_memcpy(dev->rx_sg_skb->tail, + cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb), dev->rx_skb[slot]->data, len); skb_put(dev->rx_sg_skb, len); emac_recycle_rx_skb(dev, slot, len); |