net/sunrpc: Make rpc_auth_create_args a const

This turns rpc_auth_create_args into a const as it gets passed through the
auth stack.

Signed-off-by: Sargun Dhillon <[e-mail]>
Signed-off-by: Anna Schumaker <[e-mail]>

include/linux/sunrpc/auth.h

···
 	struct module		*owner;
 	rpc_authflavor_t	au_flavor;	/* flavor (RPC_AUTH_*) */
 	char *			au_name;
-	struct rpc_auth *	(*create)(struct rpc_auth_create_args *, struct rpc_clnt *);
+	struct rpc_auth *	(*create)(const struct rpc_auth_create_args *,
+					  struct rpc_clnt *);
 	void			(*destroy)(struct rpc_auth *);
 
 	int			(*hash_cred)(struct auth_cred *, unsigned int);
···
 struct rpc_cred *	rpc_lookup_machine_cred(const char *service_name);
 int			rpcauth_register(const struct rpc_authops *);
 int			rpcauth_unregister(const struct rpc_authops *);
-struct rpc_auth *	rpcauth_create(struct rpc_auth_create_args *,
+struct rpc_auth *	rpcauth_create(const struct rpc_auth_create_args *,
 				struct rpc_clnt *);
 void			rpcauth_release(struct rpc_auth *);
 rpc_authflavor_t	rpcauth_get_pseudoflavor(rpc_authflavor_t,

net/sunrpc/auth.c

···
 EXPORT_SYMBOL_GPL(rpcauth_list_flavors);
 
 struct rpc_auth *
-rpcauth_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+rpcauth_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 {
 	struct rpc_auth		*auth;
 	const struct rpc_authops *ops;

net/sunrpc/auth_gss/auth_gss.c

···
  * parameters based on the input flavor (which must be a pseudoflavor)
  */
 static struct gss_auth *
-gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 {
 	rpc_authflavor_t flavor = args->pseudoflavor;
 	struct gss_auth *gss_auth;
···
  * (which is guaranteed to last as long as any of its descendants).
  */
 static struct gss_auth *
-gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args,
+gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args,
 		struct rpc_clnt *clnt,
 		struct gss_auth *new)
 {
···
 }
 
 static struct gss_auth *
-gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+gss_create_hashed(const struct rpc_auth_create_args *args,
+		  struct rpc_clnt *clnt)
 {
 	struct gss_auth *gss_auth;
 	struct gss_auth *new;
···
 }
 
 static struct rpc_auth *
-gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 {
 	struct gss_auth *gss_auth;
 	struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch);

net/sunrpc/auth_null.c

···
 static struct rpc_cred null_cred;
 
 static struct rpc_auth *
-nul_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+nul_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 {
 	atomic_inc(&null_auth.au_count);
 	return &null_auth;

net/sunrpc/auth_unix.c

···
 static const struct rpc_credops	unix_credops;
 
 static struct rpc_auth *
-unx_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
+unx_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 {
 	dprintk("RPC:       creating UNIX authenticator for client %p\n",
 			clnt);