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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-19 20:29:13 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:26:28 -0700
commit27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 (patch)
tree5a267e40f9b94014be38dad5de0a52b6628834e0 /net/irda/ircomm/ircomm_param.c
parentbe8bd86321fa7f06359d866ef61fb4d2f3e9dce9 (diff)
downloadlinux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.gz
[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 'net/irda/ircomm/ircomm_param.c')
-rw-r--r--net/irda/ircomm/ircomm_param.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/irda/ircomm/ircomm_param.c b/net/irda/ircomm/ircomm_param.c
index 01d7c9c7b3b..e5e4792a031 100644
--- a/net/irda/ircomm/ircomm_param.c
+++ b/net/irda/ircomm/ircomm_param.c
@@ -133,8 +133,8 @@ int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
* Inserting is a little bit tricky since we don't know how much
* room we will need. But this should hopefully work OK
*/
- count = irda_param_insert(self, pi, skb->tail, skb_tailroom(skb),
- &ircomm_param_info);
+ count = irda_param_insert(self, pi, skb_tail_pointer(skb),
+ skb_tailroom(skb), &ircomm_param_info);
if (count < 0) {
IRDA_WARNING("%s(), no room for parameter!\n", __FUNCTION__);
spin_unlock_irqrestore(&self->spinlock, flags);