From: Yuchung Cheng <ycheng@google.com>
Date: Sat, 17 Oct 2015 04:57:45 +0000 (-0700)
Subject: tcp: skb_mstamp_after helper
X-Git-Tag: firefly_0821_release~176^2~818^2~100^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=625a5e109a3ed6f36a1008a43069a3462b44a424;p=firefly-linux-kernel-4.4.55.git

tcp: skb_mstamp_after helper

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4398411236f1..24f4dfd94c51 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