diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2007-04-20 07:29:13 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 09:26:28 +0400 |
| commit | 27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 (patch) | |
| tree | 5a267e40f9b94014be38dad5de0a52b6628834e0 /drivers/usb/net/gl620a.c | |
| parent | be8bd86321fa7f06359d866ef61fb4d2f3e9dce9 (diff) | |
| download | linux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.xz | |
[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/usb/net/gl620a.c')
| -rw-r--r-- | drivers/usb/net/gl620a.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/net/gl620a.c b/drivers/usb/net/gl620a.c index d257a8e026d6..031cf5ca4dbb 100644 --- a/drivers/usb/net/gl620a.c +++ b/drivers/usb/net/gl620a.c @@ -157,7 +157,7 @@ genelink_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) if ((headroom < (4 + 4*1)) || (tailroom < padlen)) { skb->data = memmove(skb->head + (4 + 4*1), skb->data, skb->len); - skb->tail = skb->data + skb->len; + skb_set_tail_pointer(skb, skb->len); } } else { struct sk_buff *skb2; |