From: Craig Gallek <kr...@google.com>
tcp_hdrlen is wasteful if you already have a pointer to struct tcphdr.
This splits the size calculation into a helper function that can be
used if a struct tcphdr is already available.
Signed-off-by: Craig Gallek <kr...@google.com>
---
include/linux/tcp.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index b386361ba3e8..c216707d63bf 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -29,9 +29,14 @@ static inline struct tcphdr *tcp_hdr(const struct sk_buff
*skb)
return (struct tcphdr *)skb_transport_header(skb);
}
+static inline unsigned int __tcp_hdrlen(const struct tcphdr *th)
+{
+ return th->doff * 4;
+}
+
static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
{
- return tcp_hdr(skb)->doff * 4;
+ return __tcp_hdrlen(tcp_hdr(skb));
}
static inline struct tcphdr *inner_tcp_hdr(const struct sk_buff *skb)
--
2.7.0.rc3.207.g0ac5344
