netdev - [PATCH net v2 1/2] jiffies: add utility function to calculate delta in ms

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Message-Id: <20180731160333.12215-2-mcroce@redhat.com>
Date:   Tue, 31 Jul 2018 18:03:32 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     Wensong Zhang <wensong@...ux-vs.org>,
        Simon Horman <horms@...ge.net.au>,
        Julian Anastasov <ja@....bg>, lvs-devel@...r.kernel.org,
        netdev@...r.kernel.org, Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Westphal <fw@...len.de>,
        netfilter-devel@...r.kernel.org,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net v2 1/2] jiffies: add utility function to calculate delta in ms

add jiffies_delta_to_msecs() helper func to calculate the delta between
two times and eventually 0 if negative.

Suggested-by: Eric Dumazet <eric.dumazet@...il.com>
Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 include/linux/jiffies.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index a27cf6652327..fa928242567d 100644
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -447,6 +447,11 @@ static inline clock_t jiffies_delta_to_clock_t(long delta)
 	return jiffies_to_clock_t(max(0L, delta));
 }
 
+static inline unsigned int jiffies_delta_to_msecs(long delta)
+{
+	return jiffies_to_msecs(max(0L, delta));
+}
+
 extern unsigned long clock_t_to_jiffies(unsigned long x);
 extern u64 jiffies_64_to_clock_t(u64 x);
 extern u64 nsec_to_clock_t(u64 x);
-- 
2.17.1