ipv4: convert igmp_link_local_mcast_reports sysctl to u8

This sysctl is a bool, can use less storage.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/netns/ipv4.h

@@ -197,9 +197,9 @@ struct netns_ipv4 {
 	u8 sysctl_udp_l3mdev_accept;
 #endif
 
+	u8 sysctl_igmp_llm_reports;
 	int sysctl_igmp_max_memberships;
 	int sysctl_igmp_max_msf;
-	int sysctl_igmp_llm_reports;
 	int sysctl_igmp_qrv;
 
 	struct ping_group_range ping_group_range;

net/ipv4/sysctl_net_ipv4.c

@@ -848,9 +848,9 @@ static struct ctl_table ipv4_net_table[] = {
 	{
 		.procname	= "igmp_link_local_mcast_reports",
 		.data		= &init_net.ipv4.sysctl_igmp_llm_reports,
-		.maxlen		= sizeof(int),
+		.maxlen		= sizeof(u8),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec
+		.proc_handler	= proc_dou8vec_minmax,
 	},
 	{
 		.procname	= "igmp_max_memberships",