From: Matteo Croce <mcroce@redhat.com>
Date: Tue, 31 Jul 2018 16:03:32 +0000 (+0200)
Subject: jiffies: add utility function to calculate delta in ms
X-Git-Tag: v4.19-rc1~86^2~7^2~13
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=14d32b2525dd3a21c29b0d9edf1748f5dabc1bbc;p=thirdparty%2Fkernel%2Flinux.git

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@gmail.com>
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index a27cf66523279..fa928242567db 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);