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Message-ID: <Pine.LNX.4.64.0712241548180.23999@ask.diku.dk>
Date: Mon, 24 Dec 2007 15:48:43 +0100 (CET)
From: Julia Lawall <julia@...u.dk>
To: davem@...emloft.net, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org
Subject: [PATCH 33/38] net/ipv4: Use time_before, time_before_eq, etc.
From: Julia Lawall <julia@...u.dk>
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.
A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@ change_compare_np @
expression E;
@@
(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)
@ include depends on change_compare_np @
@@
#include <linux/jiffies.h>
@ no_include depends on !include && change_compare_np @
@@
#include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>
Signed-off-by: Julia Lawall <julia@...u.dk>
---
diff -r -u -p a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
--- a/net/ipv4/ip_gre.c 2007-11-01 10:30:44.000000000 +0100
+++ b/net/ipv4/ip_gre.c 2007-12-23 20:44:52.000000000 +0100
@@ -28,6 +28,7 @@
#include <linux/igmp.h>
#include <linux/netfilter_ipv4.h>
#include <linux/if_ether.h>
+#include <linux/jiffies.h>
#include <net/sock.h>
#include <net/ip.h>
@@ -373,7 +374,7 @@ static void ipgre_err(struct sk_buff *sk
if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED)
goto out;
- if (jiffies - t->err_time < IPTUNNEL_ERR_TIMEO)
+ if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO))
t->err_count++;
else
t->err_count = 1;
@@ -799,7 +800,8 @@ static int ipgre_tunnel_xmit(struct sk_b
#endif
if (tunnel->err_count > 0) {
- if (jiffies - tunnel->err_time < IPTUNNEL_ERR_TIMEO) {
+ if (time_before(jiffies,
+ tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
tunnel->err_count--;
dst_link_failure(skb);
diff -r -u -p a/net/ipv4/ipip.c b/net/ipv4/ipip.c
--- a/net/ipv4/ipip.c 2007-11-01 10:30:44.000000000 +0100
+++ b/net/ipv4/ipip.c 2007-12-23 20:45:06.000000000 +0100
@@ -108,6 +108,7 @@
#include <linux/init.h>
#include <linux/netfilter_ipv4.h>
#include <linux/if_ether.h>
+#include <linux/jiffies.h>
#include <net/sock.h>
#include <net/ip.h>
@@ -317,7 +318,7 @@ static int ipip_err(struct sk_buff *skb,
if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED)
goto out;
- if (jiffies - t->err_time < IPTUNNEL_ERR_TIMEO)
+ if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO))
t->err_count++;
else
t->err_count = 1;
@@ -582,7 +583,8 @@ static int ipip_tunnel_xmit(struct sk_bu
}
if (tunnel->err_count > 0) {
- if (jiffies - tunnel->err_time < IPTUNNEL_ERR_TIMEO) {
+ if (time_before(jiffies,
+ tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
tunnel->err_count--;
dst_link_failure(skb);
} else
diff -r -u -p a/net/ipv4/ipvs/ip_vs_lblcr.c b/net/ipv4/ipvs/ip_vs_lblcr.c
--- a/net/ipv4/ipvs/ip_vs_lblcr.c 2007-12-09 09:35:20.000000000 +0100
+++ b/net/ipv4/ipvs/ip_vs_lblcr.c 2007-12-23 20:45:42.000000000 +0100
@@ -733,7 +733,8 @@ ip_vs_lblcr_schedule(struct ip_vs_servic
ip_vs_dest_set_insert(&en->set, dest);
}
if (atomic_read(&en->set.size) > 1 &&
- jiffies-en->set.lastmod > sysctl_ip_vs_lblcr_expiration) {
+ time_after(jiffies,
+ en->set.lastmod+sysctl_ip_vs_lblcr_expiration)){
struct ip_vs_dest *m;
m = ip_vs_dest_set_max(&en->set);
if (m)
--
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