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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/ipv6/icmp.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/ipv6/icmp.c')
-rw-r--r--net/ipv6/icmp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index d3edc3cf1ce9..e94992ab92e6 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -317,7 +317,8 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
int hlimit, tclass;
int err = 0;
- if ((u8*)hdr < skb->head || (u8*)(hdr+1) > skb->tail)
+ if ((u8 *)hdr < skb->head ||
+ (skb->network_header + sizeof(*hdr)) > skb->tail)
return;
/*