Merge git://git.infradead.org/~dwmw2/random-2.6

[pandora-kernel.git] / include / linux / moduleparam.h

diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index bb151bc..ec62438 100644 (file)
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -18,7 +18,7 @@
 #define __module_cat(a,b) ___module_cat(a,b)
 #define __MODULE_INFO(tag, name, info)                                   \
 static const char __module_cat(name,__LINE__)[]                                  \
-  __attribute_used__                                                     \
+  __used                                                                 \
   __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
 #else  /* !MODULE */
 #define __MODULE_INFO(tag, name, info)
@@ -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 */
@@ -58,6 +62,16 @@ struct kparam_array
        void *elem;
 };
 
+/* On alpha, ia64 and ppc64 relocations to global data cannot go into
+   read-only sections (which is part of respective UNIX ABI on these
+   platforms). So 'const' makes no sense and even causes compile failures
+   with some compilers. */
+#if defined(CONFIG_ALPHA) || defined(CONFIG_IA64) || defined(CONFIG_PPC64)
+#define __moduleparam_const
+#else
+#define __moduleparam_const const
+#endif
+
 /* This is the fundamental function for registering boot/module
    parameters.  perm sets the visibility in sysfs: 000 means it's
    not there, read bits mean it's readable, write bits mean it's
@@ -66,11 +80,11 @@ 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 struct kernel_param const __param_##name                 \
-       __attribute_used__                                              \
+       static const char __param_str_##name[] = prefix #name;          \
+       static struct kernel_param __moduleparam_const __param_##name   \
+       __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 +102,10 @@ 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 +163,11 @@ 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)             \
@@ -169,10 +183,22 @@ extern int param_get_string(char *buffer, struct kernel_param *kp);
 
 struct module;
 
+#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
 extern int module_param_sysfs_setup(struct module *mod,
                                    struct kernel_param *kparam,
                                    unsigned int num_params);
 
 extern void module_param_sysfs_remove(struct module *mod);
+#else
+static inline int module_param_sysfs_setup(struct module *mod,
+                            struct kernel_param *kparam,
+                            unsigned int num_params)
+{
+       return 0;
+}
+
+static inline void module_param_sysfs_remove(struct module *mod)
+{ }
+#endif
 
 #endif /* _LINUX_MODULE_PARAMS_H */