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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-20 05:29:13 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 07:26:28 +0200
commit27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 (patch)
tree5a267e40f9b94014be38dad5de0a52b6628834e0 /drivers/mfd
parent[VLAN] vlan_dev: Use skb_reset_network_header(). (diff)
downloadlinux-27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26.tar.xz
linux-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/mfd')
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