ipv4: NET_IPV4_ROUTE_GC_INTERVAL removal

removing obsoleted sysctl,
ip_rt_gc_interval variable no longer used since 2.6.38

Signed-off-by: Vasily Averin <vvs@sw.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/sysctl.h

@@ -435,7 +435,7 @@ enum {
 	NET_IPV4_ROUTE_MAX_SIZE=5,
 	NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
 	NET_IPV4_ROUTE_GC_TIMEOUT=7,
-	NET_IPV4_ROUTE_GC_INTERVAL=8,
+	NET_IPV4_ROUTE_GC_INTERVAL=8, /* obsolete since 2.6.38 */
 	NET_IPV4_ROUTE_REDIRECT_LOAD=9,
 	NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
 	NET_IPV4_ROUTE_REDIRECT_SILENCE=11,

kernel/sysctl_binary.c

@@ -214,7 +214,7 @@ static const struct bin_table bin_net_ipv4_route_table[] = {
 	{ CTL_INT,	NET_IPV4_ROUTE_GC_MIN_INTERVAL,		"gc_min_interval" },
 	{ CTL_INT,	NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,	"gc_min_interval_ms" },
 	{ CTL_INT,	NET_IPV4_ROUTE_GC_TIMEOUT,		"gc_timeout" },
-	{ CTL_INT,	NET_IPV4_ROUTE_GC_INTERVAL,		"gc_interval" },
+	/* NET_IPV4_ROUTE_GC_INTERVAL "gc_interval" no longer used */
 	{ CTL_INT,	NET_IPV4_ROUTE_REDIRECT_LOAD,		"redirect_load" },
 	{ CTL_INT,	NET_IPV4_ROUTE_REDIRECT_NUMBER,		"redirect_number" },
 	{ CTL_INT,	NET_IPV4_ROUTE_REDIRECT_SILENCE,	"redirect_silence" },

net/ipv4/route.c

@@ -120,7 +120,6 @@
 
 static int ip_rt_max_size;
 static int ip_rt_gc_timeout __read_mostly	= RT_GC_TIMEOUT;
-static int ip_rt_gc_interval __read_mostly	= 60 * HZ;
 static int ip_rt_gc_min_interval __read_mostly	= HZ / 2;
 static int ip_rt_redirect_number __read_mostly	= 9;
 static int ip_rt_redirect_load __read_mostly	= HZ / 50;
@@ -3120,13 +3119,6 @@ static ctl_table ipv4_route_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
 	},
-	{
-		.procname	= "gc_interval",
-		.data		= &ip_rt_gc_interval,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_jiffies,
-	},
 	{
 		.procname	= "redirect_load",
 		.data		= &ip_rt_redirect_load,