diff options
| author | Craig Gallek <kraig@google.com> | 2016-02-10 11:50:37 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-31 12:06:13 +0100 |
| commit | bed42ef5ebbfc046e0440f7e0f941cc07f8ca1e8 (patch) | |
| tree | 15b46f736f19f18882d1fef04baefb43fe8081d7 | |
| parent | 6c489ab43ccacb9f26620ded90374c582c466344 (diff) | |
tcp: __tcp_hdrlen() helper
commit d9b3fca27385eafe61c3ca6feab6cb1e7dc77482 upstream.
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 <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/tcp.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 318c24612458..2260f92f1492 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) |