From: Eric Dumazet <dada1@cosmosbay.com>
Date: Fri, 4 Jan 2008 04:40:01 +0000 (-0800)
Subject: [NET]: Avoid divides in net/core/gen_estimator.c
X-Git-Tag: v2.6.25-rc1~1162^2~878
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=789675e216617b1331875c42a81f58227a06df91;p=linux-2.6

[NET]: Avoid divides in net/core/gen_estimator.c

We can void divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on x86)
changing ((HZ<<idx)/4) to ((HZ/4) << idx)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
index daadbcc4e8..86037d16f1 100644
--- a/net/core/gen_estimator.c
+++ b/net/core/gen_estimator.c
@@ -135,7 +135,7 @@ skip:
 	}
 
 	if (!list_empty(&elist[idx].list))
-		mod_timer(&elist[idx].timer, jiffies + ((HZ<<idx)/4));
+		mod_timer(&elist[idx].timer, jiffies + ((HZ/4) << idx));
 	rcu_read_unlock();
 }
 
@@ -191,7 +191,7 @@ int gen_new_estimator(struct gnet_stats_basic *bstats,
 	}
 
 	if (list_empty(&elist[idx].list))
-		mod_timer(&elist[idx].timer, jiffies + ((HZ<<idx)/4));
+		mod_timer(&elist[idx].timer, jiffies + ((HZ/4) << idx));
 
 	list_add_rcu(&est->list, &elist[idx].list);
 	return 0;