[PATCH net-next 5/7] tcp: skb_mstamp_after helper

[Yuchung Cheng <ycheng@google.com>]

a helper to prepare the first main RACK patch.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/skbuff.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4398411..24f4dfd 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -463,6 +463,15 @@ static inline u32 skb_mstamp_us_delta(const struct skb_mstamp *t1,
 	return delta_us;
 }
 
+static inline bool skb_mstamp_after(const struct skb_mstamp *t1,
+				    const struct skb_mstamp *t0)
+{
+	s32 diff = t1->stamp_jiffies - t0->stamp_jiffies;
+
+	if (!diff)
+		diff = t1->stamp_us - t0->stamp_us;
+	return diff > 0;
+}
 
 /** 
  *	struct sk_buff - socket buffer
-- 
2.6.0.rc2.230.g3dd15c0