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

To: Wensong Zhang <wensong@xxxxxxxxxxxx>, Simon Horman <horms@xxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>, lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
Subject: [PATCH net v2 1/2] jiffies: add utility function to calculate delta in ms
Cc: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>, Florian Westphal <fw@xxxxxxxxx>, netfilter-devel@xxxxxxxxxxxxxxx, Eric Dumazet <eric.dumazet@xxxxxxxxx>
From: Matteo Croce <mcroce@xxxxxxxxxx>
Date: Tue, 31 Jul 2018 18:03:32 +0200
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@xxxxxxxxx>
Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxx>
 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);

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