commit 548ec114705bb8f0879a0da12abec17f17a7cc26
author Lin Zhang <xiaolou4617@gmail.com> Fri Oct 06 01:40:35 2017 +0800
committer David S. Miller <davem@davemloft.net> Sat Oct 07 23:15:08 2017 +0100
tree 2109c7f34d7bea667c3a0540470dbf644016e0bd
parent 64237470ddf97b63155fbd272c9e743e01d5f514

net: phonet: mark phonet_protocol as const

The phonet_protocol structs don't need to be written by anyone and
so can be marked as const.

Signed-off-by: Lin Zhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/phonet/af_phonet.c

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index b12142e..3b0ef69 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -35,11 +35,11 @@
 #include <net/phonet/pn_dev.h>
 
 /* Transport protocol registration */
-static struct phonet_protocol *proto_tab[PHONET_NPROTO] __read_mostly;
+static const struct phonet_protocol *proto_tab[PHONET_NPROTO] __read_mostly;
 
-static struct phonet_protocol *phonet_proto_get(unsigned int protocol)
+static const struct phonet_protocol *phonet_proto_get(unsigned int protocol)
 {
-	struct phonet_protocol *pp;
+	const struct phonet_protocol *pp;
 
 	if (protocol >= PHONET_NPROTO)
 		return NULL;
@@ -53,7 +53,7 @@ static struct phonet_protocol *phonet_proto_get(unsigned int protocol)
 	return pp;
 }
 
-static inline void phonet_proto_put(struct phonet_protocol *pp)
+static inline void phonet_proto_put(const struct phonet_protocol *pp)
 {
 	module_put(pp->prot->owner);
 }
@@ -65,7 +65,7 @@ static int pn_socket_create(struct net *net, struct socket *sock, int protocol,
 {
 	struct sock *sk;
 	struct pn_sock *pn;
-	struct phonet_protocol *pnp;
+	const struct phonet_protocol *pnp;
 	int err;
 
 	if (!capable(CAP_SYS_ADMIN))
@@ -470,7 +470,7 @@ static struct packet_type phonet_packet_type __read_mostly = {
 static DEFINE_MUTEX(proto_tab_lock);
 
 int __init_or_module phonet_proto_register(unsigned int protocol,
-						struct phonet_protocol *pp)
+				const struct phonet_protocol *pp)
 {
 	int err = 0;
 
@@ -492,7 +492,8 @@ int __init_or_module phonet_proto_register(unsigned int protocol,
 }
 EXPORT_SYMBOL(phonet_proto_register);
 
-void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp)
+void phonet_proto_unregister(unsigned int protocol,
+			const struct phonet_protocol *pp)
 {
 	mutex_lock(&proto_tab_lock);
 	BUG_ON(proto_tab[protocol] != pp);