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

[Matteo Croce <mcroce@xxxxxxxxxx>]

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);
-- 
2.17.1

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