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/sctp/inqueue.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'net/sctp/inqueue.c') diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c index c30629e1778..88aa2240754 100644 --- a/net/sctp/inqueue.c +++ b/net/sctp/inqueue.c @@ -159,16 +159,16 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) * the skb->tail. */ if (unlikely(skb_is_nonlinear(chunk->skb))) { - if (chunk->chunk_end > chunk->skb->tail) - chunk->chunk_end = chunk->skb->tail; + if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) + chunk->chunk_end = skb_tail_pointer(chunk->skb); } skb_pull(chunk->skb, sizeof(sctp_chunkhdr_t)); chunk->subh.v = NULL; /* Subheader is no longer valid. */ - if (chunk->chunk_end < chunk->skb->tail) { + if (chunk->chunk_end < skb_tail_pointer(chunk->skb)) { /* This is not a singleton */ chunk->singleton = 0; - } else if (chunk->chunk_end > chunk->skb->tail) { + } else if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) { /* RFC 2960, Section 6.10 Bundling * * Partial chunks MUST NOT be placed in an SCTP packet. -- cgit v1.2.3