[PATCH 3/8] net: ipv6: delete these duplicate static variables two_five_five and minus_one

[wenyang.linux@foxmail.com]

From: Wen Yang <wenyang.linux@foxmail.com>

Since these static variables (two_five_five and minus_one) are only used
for boundary checks and will not be changed, remove them and use the ones
in our shared const array.

Signed-off-by: Wen Yang <wenyang.linux@foxmail.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Joel Granados <j.granados@samsung.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Ahern <dsahern@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 net/ipv6/addrconf.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d63f5d063f07..1d55df7d34ed 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -6660,8 +6660,6 @@ static int addrconf_sysctl_disable_policy(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static int minus_one = -1;
-static const int two_five_five = 255;
 static u32 ioam6_if_id_max = U16_MAX;
 
 static const struct ctl_table addrconf_sysctl[] = {
@@ -6678,8 +6676,8 @@ static const struct ctl_table addrconf_sysctl[] = {
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= (void *)SYSCTL_ONE,
-		.extra2		= (void *)&two_five_five,
+		.extra1		= SYSCTL_ONE,
+		.extra2		= SYSCTL_U8_MAX,
 	},
 	{
 		.procname	= "mtu",
@@ -6722,7 +6720,7 @@ static const struct ctl_table addrconf_sysctl[] = {
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= &minus_one,
+		.extra1		= SYSCTL_NEG_ONE,
 	},
 	{
 		.procname	= "router_solicitation_interval",
@@ -7061,8 +7059,8 @@ static const struct ctl_table addrconf_sysctl[] = {
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= (void *)SYSCTL_ZERO,
-		.extra2		= (void *)&two_five_five,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_U8_MAX,
 	},
 	{
 		.procname	= "rpl_seg_enabled",
-- 
2.25.1