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constify string/array kparam tracking structures

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.. in an effort to make read-only whatever can be made, so that
CONFIG_DEBUG_RODATA can catch as many issues as possible.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Beulich 2007-10-16 23:29:34 -07:00 • committed by Linus Torvalds
parent d5aa0daf6d
commit 22e48eaf58
2 changed files with 18 additions and 17 deletions
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18
include/linux/moduleparam.h
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@ -38,7 +38,11 @@ struct kernel_param {
unsigned int perm;
param_set_fn set;
param_get_fn get;
void *arg;
union {
void *arg;
const struct kparam_string *str;
const struct kparam_array *arr;
};
};
/* Special one for strings we want to copy into */
@ -66,11 +70,11 @@ struct kparam_array
/* Default value instead of permissions? */ \
static int __param_perm_check_##name __attribute__((unused)) = \
BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2)); \
static char __param_str_##name[] = prefix #name; \
static const char __param_str_##name[] = prefix #name; \
static struct kernel_param const __param_##name \
__attribute_used__ \
__attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
= { __param_str_##name, perm, set, get, arg }
= { __param_str_##name, perm, set, get, { arg } }
#define module_param_call(name, set, get, arg, perm) \
__module_param_call(MODULE_PARAM_PREFIX, name, set, get, arg, perm)
@ -88,10 +92,10 @@ struct kparam_array
/* Actually copy string: maxlen param is usually sizeof(string). */
#define module_param_string(name, string, len, perm) \
static struct kparam_string __param_string_##name \
static const struct kparam_string __param_string_##name \
= { len, string }; \
module_param_call(name, param_set_copystring, param_get_string, \
&__param_string_##name, perm); \
.str = &__param_string_##name, perm); \
__MODULE_PARM_TYPE(name, "string")
/* Called on module insert or kernel boot */
@ -149,11 +153,11 @@ extern int param_get_invbool(char *buffer, struct kernel_param *kp);
/* Comma-separated array: *nump is set to number they actually specified. */
#define module_param_array_named(name, array, type, nump, perm) \
static struct kparam_array __param_arr_##name \
static const struct kparam_array __param_arr_##name \
= { ARRAY_SIZE(array), nump, param_set_##type, param_get_##type,\
sizeof(array[0]), array }; \
module_param_call(name, param_array_set, param_array_get, \
&__param_arr_##name, perm); \
.arr = &__param_arr_##name, perm); \
__MODULE_PARM_TYPE(name, "array of " #type)
#define module_param_array(name, type, nump, perm) \