From 27a884dc3cb63b93c2b3b643f5b31eed5f8a4d26 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 19 Apr 2007 20:29:13 -0700 Subject: [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 Signed-off-by: David S. Miller --- net/sched/sch_ingress.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/sched/sch_ingress.c') diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c index cfe070ee6ee3..d19f4070c237 100644 --- a/net/sched/sch_ingress.c +++ b/net/sched/sch_ingress.c @@ -362,12 +362,12 @@ static void ingress_destroy(struct Qdisc *sch) static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb) { - unsigned char *b = skb->tail; + unsigned char *b = skb_tail_pointer(skb); struct rtattr *rta; rta = (struct rtattr *) b; RTA_PUT(skb, TCA_OPTIONS, 0, NULL); - rta->rta_len = skb->tail - b; + rta->rta_len = skb_tail_pointer(skb) - b; return skb->len; rtattr_failure: -- cgit v1.2.3-59-g8ed1b