diff options
| 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/s2io.c | |
| parent | be8bd86321fa7f06359d866ef61fb4d2f3e9dce9 (diff) | |
| download | lwn-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.gz lwn-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/s2io.c')
| -rw-r--r-- | drivers/net/s2io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c index 46ebf141ee5a..600d3ff347fc 100644 --- a/drivers/net/s2io.c +++ b/drivers/net/s2io.c @@ -2195,7 +2195,7 @@ static int fill_rxd_3buf(struct s2io_nic *nic, struct RxD_t *rxdp, struct \ frag_list->next = NULL; tmp = (void *)ALIGN((long)frag_list->data, ALIGN_SIZE + 1); frag_list->data = tmp; - frag_list->tail = tmp; + skb_reset_tail_pointer(frag_list); /* Buffer-2 receives L4 data payload */ ((struct RxD3*)rxdp)->Buffer2_ptr = pci_map_single(nic->pdev, @@ -2349,7 +2349,7 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) tmp += ALIGN_SIZE; tmp &= ~ALIGN_SIZE; skb->data = (void *) (unsigned long)tmp; - skb->tail = (void *) (unsigned long)tmp; + skb_reset_tail_pointer(skb); if (!(((struct RxD3*)rxdp)->Buffer0_ptr)) ((struct RxD3*)rxdp)->Buffer0_ptr = |