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[1/3] net: Introduce skb_checksum_start_offset()

Message ID b1d596064d2b9ae518f79ac82711ff84ea46a19d.1292372504.git.mirq-linux@rere.qmqm.pl
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Michał Mirosław Dec. 15, 2010, 1:24 a.m. UTC 
Introduce skb_checksum_start_offset() to replace repetitive calculation.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 include/linux/skbuff.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
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Patch

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 19f37a6..0491da5 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1355,6 +1355,11 @@  static inline void skb_set_mac_header(struct sk_buff *skb, const int offset)
 }
 #endif /* NET_SKBUFF_DATA_USES_OFFSET */
 
+static inline int skb_checksum_start_offset(const struct sk_buff *skb)
+{
+	return skb->csum_start - skb_headroom(skb);
+}
+
 static inline int skb_transport_offset(const struct sk_buff *skb)
 {
 	return skb_transport_header(skb) - skb->data;