From: Leslie Monis <lesliemonis@gmail.com>
Date: Wed, 27 Feb 2019 01:00:06 +0000 (+0530)
Subject: net: sched: pie: fix 64-bit division
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ff8285f81822dc8f528b36b6c5c8ab132367e92d;p=linux.git

net: sched: pie: fix 64-bit division

Use div_u64() to resolve build failures on 32-bit platforms.

Fixes: 3f7ae5f3dc52 ("net: sched: pie: add more cases to auto-tune alpha and beta")
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/sched/sch_pie.c b/net/sched/sch_pie.c
index 4c0670b6aec1b..f93cfe034c729 100644
--- a/net/sched/sch_pie.c
+++ b/net/sched/sch_pie.c
@@ -429,7 +429,7 @@ static void calculate_probability(struct Qdisc *sch)
 	 */
 
 	if (qdelay == 0 && qdelay_old == 0 && update_prob)
-		q->vars.prob = (q->vars.prob * 98) / 100;
+		q->vars.prob = 98 * div_u64(q->vars.prob, 100);
 
 	q->vars.qdelay = qdelay;
 	q->vars.qlen_old = qlen;