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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-19 23:29:13 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 01:26:28 -0400
commit27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 (patch)
tree5a267e40f9b94014be38dad5de0a52b6628834e0 /net/tipc/config.c
parentbe8bd86321fa7f06359d866ef61fb4d2f3e9dce9 (diff)
[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/tipc/config.c')
-rw-r--r--net/tipc/config.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/tipc/config.c b/net/tipc/config.c
index 14789a82de53..c71337a22d33 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -89,7 +89,7 @@ struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
89int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type, 89int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
90 void *tlv_data, int tlv_data_size) 90 void *tlv_data, int tlv_data_size)
91{ 91{
92 struct tlv_desc *tlv = (struct tlv_desc *)buf->tail; 92 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
93 int new_tlv_space = TLV_SPACE(tlv_data_size); 93 int new_tlv_space = TLV_SPACE(tlv_data_size);
94 94
95 if (skb_tailroom(buf) < new_tlv_space) { 95 if (skb_tailroom(buf) < new_tlv_space) {