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| author | Jan Beulich <jbeulich@novell.com> | 2007-10-16 23:29:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:56 -0700 |
| commit | 22e48eaf587d044ba311a73c6fe0d0deaa8fdb63 (patch) | |
| tree | 8407d8f3f9a69b275e9008249e678499ce92253d /include/linux/moduleparam.h | |
| parent | d5aa0daf6d9f327a9c13bc3a203bfac2b8707e2f (diff) | |
| download | lwn-22e48eaf587d044ba311a73c6fe0d0deaa8fdb63.tar.gz lwn-22e48eaf587d044ba311a73c6fe0d0deaa8fdb63.zip | |
constify string/array kparam tracking structures
.. 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>
Diffstat (limited to 'include/linux/moduleparam.h')
| -rw-r--r-- | include/linux/moduleparam.h | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h index c83588c8d08b..13410b20600f 100644 --- a/include/linux/moduleparam.h +++ b/include/linux/moduleparam.h @@ -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) \ |