param: make param sections const.

Since this section can be read-only (they're in .rodata), they should
always have been const.  Minor flow-through various functions.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tested-by: Phil Carmody <ext-phil.2.carmody@nokia.com>

include/linux/moduleparam.h

@@ -161,7 +161,7 @@ __check_old_set_param(int (*oldset)(const char *, struct kernel_param *))
 /* Called on module insert or kernel boot */
 extern int parse_args(const char *name,
 		      char *args,
-		      struct kernel_param *params,
+		      const struct kernel_param *params,
 		      unsigned num,
 		      int (*unknown)(char *param, char *val));
 

init/main.c

@@ -201,11 +201,11 @@ static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 static const char *panic_later, *panic_param;
 
-extern struct obs_kernel_param __setup_start[], __setup_end[];
+extern const struct obs_kernel_param __setup_start[], __setup_end[];
 
 static int __init obsolete_checksetup(char *line)
 {
-	struct obs_kernel_param *p;
+	const struct obs_kernel_param *p;
 	int had_early_param = 0;
 
 	p = __setup_start;
@@ -458,7 +458,7 @@ static noinline void __init_refok rest_init(void)
 /* Check for early params. */
 static int __init do_early_param(char *param, char *val)
 {
-	struct obs_kernel_param *p;
+	const struct obs_kernel_param *p;
 
 	for (p = __setup_start; p < __setup_end; p++) {
 		if ((p->early && strcmp(param, p->str) == 0) ||
@@ -536,7 +536,7 @@ static void __init mm_init(void)
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
-	extern struct kernel_param __start___param[], __stop___param[];
+	extern const struct kernel_param __start___param[], __stop___param[];
 
 	smp_setup_processor_id();
 

kernel/params.c

@@ -88,7 +88,7 @@ static inline int parameq(const char *input, const char *paramname)
 
 static int parse_one(char *param,
 		     char *val,
-		     struct kernel_param *params, 
+		     const struct kernel_param *params,
 		     unsigned num_params,
 		     int (*handle_unknown)(char *param, char *val))
 {
@@ -170,7 +170,7 @@ static char *next_arg(char *args, char **param, char **val)
 /* Args looks like "foo=bar,bar2 baz=fuz wiz". */
 int parse_args(const char *name,
 	       char *args,
-	       struct kernel_param *params,
+	       const struct kernel_param *params,
 	       unsigned num,
 	       int (*unknown)(char *param, char *val))
 {