diff options
Diffstat (limited to 'include/linux/moduleparam.h')
| -rw-r--r-- | include/linux/moduleparam.h | 415 |
1 files changed, 295 insertions, 120 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h index 27d9da3f86ff..915f32f7d888 100644 --- a/include/linux/moduleparam.h +++ b/include/linux/moduleparam.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MODULE_PARAMS_H #define _LINUX_MODULE_PARAMS_H /* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */ @@ -5,38 +6,55 @@ #include <linux/stringify.h> #include <linux/kernel.h> +/* + * The maximum module name length, including the NUL byte. + * Chosen so that structs with an unsigned long line up, specifically + * modversion_info. + */ +#define __MODULE_NAME_LEN (64 - sizeof(unsigned long)) + /* You can override this manually, but generally this should match the module name. */ #ifdef MODULE #define MODULE_PARAM_PREFIX /* empty */ +#define __MODULE_INFO_PREFIX /* empty */ #else #define MODULE_PARAM_PREFIX KBUILD_MODNAME "." +/* We cannot use MODULE_PARAM_PREFIX because some modules override it. */ +#define __MODULE_INFO_PREFIX KBUILD_MODNAME "." #endif -/* Chosen so that structs with an unsigned long line up. */ -#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long)) +/* Generic info of form tag = "info" */ +#define MODULE_INFO(tag, info) \ + static_assert( \ + sizeof(info) - 1 == __builtin_strlen(info), \ + "MODULE_INFO(" #tag ", ...) contains embedded NUL byte"); \ + static const char __UNIQUE_ID(modinfo)[] \ + __used __section(".modinfo") __aligned(1) \ + = __MODULE_INFO_PREFIX __stringify(tag) "=" info -#ifdef MODULE -#define __MODULE_INFO(tag, name, info) \ -static const char __UNIQUE_ID(name)[] \ - __used __attribute__((section(".modinfo"), unused, aligned(1))) \ - = __stringify(tag) "=" info -#else /* !MODULE */ -/* This struct is here for syntactic coherency, it is not used */ -#define __MODULE_INFO(tag, name, info) \ - struct __UNIQUE_ID(name) {} -#endif #define __MODULE_PARM_TYPE(name, _type) \ - __MODULE_INFO(parmtype, name##type, #name ":" _type) + MODULE_INFO(parmtype, #name ":" _type) /* One for each parameter, describing how to use it. Some files do multiple of these per line, so can't just use MODULE_INFO. */ #define MODULE_PARM_DESC(_parm, desc) \ - __MODULE_INFO(parm, _parm, #_parm ":" desc) + MODULE_INFO(parm, #_parm ":" desc) struct kernel_param; +/* + * Flags available for kernel_param_ops + * + * NOARG - the parameter allows for no argument (foo instead of foo=1) + */ +enum { + KERNEL_PARAM_OPS_FL_NOARG = (1 << 0) +}; + struct kernel_param_ops { + /* How the ops should behave */ + unsigned int flags; /* Returns 0, or -errno. arg is in kp->arg. */ int (*set)(const char *val, const struct kernel_param *kp); /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ @@ -45,11 +63,24 @@ struct kernel_param_ops { void (*free)(void *arg); }; +/* + * Flags available for kernel_param + * + * UNSAFE - the parameter is dangerous and setting it will taint the kernel + * HWPARAM - Hardware param not permitted in lockdown mode + */ +enum { + KERNEL_PARAM_FL_UNSAFE = (1 << 0), + KERNEL_PARAM_FL_HWPARAM = (1 << 1), +}; + struct kernel_param { const char *name; + struct module *mod; const struct kernel_param_ops *ops; - u16 perm; - s16 level; + const u16 perm; + s8 level; + u8 flags; union { void *arg; const struct kparam_string *str; @@ -57,6 +88,8 @@ struct kernel_param { }; }; +extern const struct kernel_param __start___param[], __stop___param[]; + /* Special one for strings we want to copy into */ struct kparam_string { unsigned int maxlen; @@ -75,17 +108,17 @@ struct kparam_array /** * module_param - typesafe helper for a module/cmdline parameter - * @value: the variable to alter, and exposed parameter name. + * @name: the variable to alter, and exposed parameter name. * @type: the type of the parameter * @perm: visibility in sysfs. * - * @value becomes the module parameter, or (prefixed by KBUILD_MODNAME and a + * @name becomes the module parameter, or (prefixed by KBUILD_MODNAME and a * ".") the kernel commandline parameter. Note that - is changed to _, so * the user can use "foo-bar=1" even for variable "foo_bar". * - * @perm is 0 if the the variable is not to appear in sysfs, or 0444 + * @perm is 0 if the variable is not to appear in sysfs, or 0444 * for world-readable, 0644 for root-writable, etc. Note that if it - * is writable, you may need to use kparam_block_sysfs_write() around + * is writable, you may need to use kernel_param_lock() around * accesses (esp. charp, which can be kfreed when it changes). * * The @type is simply pasted to refer to a param_ops_##type and a @@ -93,7 +126,7 @@ struct kparam_array * you can create your own by defining those variables. * * Standard types are: - * byte, short, ushort, int, uint, long, ulong + * byte, hexint, short, ushort, int, uint, long, ulong * charp: a character pointer * bool: a bool, values 0/1, y/n, Y/N. * invbool: the above, only sense-reversed (N = true). @@ -102,6 +135,15 @@ struct kparam_array module_param_named(name, name, type, perm) /** + * module_param_unsafe - same as module_param but taints kernel + * @name: the variable to alter, and exposed parameter name. + * @type: the type of the parameter + * @perm: visibility in sysfs. + */ +#define module_param_unsafe(name, type, perm) \ + module_param_named_unsafe(name, name, type, perm) + +/** * module_param_named - typesafe helper for a renamed module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @value: the actual lvalue to alter. @@ -118,46 +160,123 @@ struct kparam_array __MODULE_PARM_TYPE(name, #type) /** + * module_param_named_unsafe - same as module_param_named but taints kernel + * @name: a valid C identifier which is the parameter name. + * @value: the actual lvalue to alter. + * @type: the type of the parameter + * @perm: visibility in sysfs. + */ +#define module_param_named_unsafe(name, value, type, perm) \ + param_check_##type(name, &(value)); \ + module_param_cb_unsafe(name, ¶m_ops_##type, &value, perm); \ + __MODULE_PARM_TYPE(name, #type) + +/** * module_param_cb - general callback for a module/cmdline parameter * @name: a valid C identifier which is the parameter name. * @ops: the set & get operations for this parameter. + * @arg: args for @ops * @perm: visibility in sysfs. * * The ops can have NULL set or get functions. */ #define module_param_cb(name, ops, arg, perm) \ - __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1) + __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0) + +#define module_param_cb_unsafe(name, ops, arg, perm) \ + __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, \ + KERNEL_PARAM_FL_UNSAFE) +#define __level_param_cb(name, ops, arg, perm, level) \ + __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, level, 0) /** - * <level>_param_cb - general callback for a module/cmdline parameter - * to be evaluated before certain initcall level + * core_param_cb - general callback for a module/cmdline parameter + * to be evaluated before core initcall level * @name: a valid C identifier which is the parameter name. * @ops: the set & get operations for this parameter. + * @arg: args for @ops * @perm: visibility in sysfs. * * The ops can have NULL set or get functions. */ -#define __level_param_cb(name, ops, arg, perm, level) \ - __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, level) - #define core_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 1) +/** + * postcore_param_cb - general callback for a module/cmdline parameter + * to be evaluated before postcore initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define postcore_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 2) +/** + * arch_param_cb - general callback for a module/cmdline parameter + * to be evaluated before arch initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define arch_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 3) +/** + * subsys_param_cb - general callback for a module/cmdline parameter + * to be evaluated before subsys initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define subsys_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 4) +/** + * fs_param_cb - general callback for a module/cmdline parameter + * to be evaluated before fs initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define fs_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 5) +/** + * device_param_cb - general callback for a module/cmdline parameter + * to be evaluated before device initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define device_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 6) +/** + * late_param_cb - general callback for a module/cmdline parameter + * to be evaluated before late initcall level + * @name: a valid C identifier which is the parameter name. + * @ops: the set & get operations for this parameter. + * @arg: args for @ops + * @perm: visibility in sysfs. + * + * The ops can have NULL set or get functions. + */ #define late_param_cb(name, ops, arg, perm) \ __level_param_cb(name, ops, arg, perm, 7) @@ -165,92 +284,41 @@ struct kparam_array 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) +#if defined(CONFIG_ALPHA) || defined(CONFIG_PPC64) #define __moduleparam_const #else #define __moduleparam_const const #endif -/* This is the fundamental function for registering boot/module - parameters. */ -#define __module_param_call(prefix, name, ops, arg, perm, level) \ - /* Default value instead of permissions? */ \ - static int __param_perm_check_##name __attribute__((unused)) = \ - BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2)) \ - + BUILD_BUG_ON_ZERO(sizeof(""prefix) > MAX_PARAM_PREFIX_LEN); \ +/* This is the fundamental function for registering boot/module parameters. */ +#define __module_param_call(prefix, name, ops, arg, perm, level, flags) \ + static_assert(sizeof(""prefix) - 1 <= __MODULE_NAME_LEN); \ 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, ops, perm, level, { arg } } - -/* Obsolete - use module_param_cb() */ -#define module_param_call(name, set, get, arg, perm) \ - static struct kernel_param_ops __param_ops_##name = \ - { (void *)set, (void *)get }; \ - __module_param_call(MODULE_PARAM_PREFIX, \ - name, &__param_ops_##name, arg, \ - (perm) + sizeof(__check_old_set_param(set))*0, -1) - -/* We don't get oldget: it's often a new-style param_get_uint, etc. */ -static inline int -__check_old_set_param(int (*oldset)(const char *, struct kernel_param *)) -{ - return 0; -} - -/** - * kparam_block_sysfs_write - make sure a parameter isn't written via sysfs. - * @name: the name of the parameter - * - * There's no point blocking write on a paramter that isn't writable via sysfs! + __used __section("__param") \ + __aligned(__alignof__(struct kernel_param)) \ + = { __param_str_##name, THIS_MODULE, ops, \ + VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg } } + +/* + * Useful for describing a set/get pair used only once (i.e. for this + * parameter). For repeated set/get pairs (i.e. the same struct + * kernel_param_ops), use module_param_cb() instead. */ -#define kparam_block_sysfs_write(name) \ - do { \ - BUG_ON(!(__param_##name.perm & 0222)); \ - __kernel_param_lock(); \ - } while (0) - -/** - * kparam_unblock_sysfs_write - allows sysfs to write to a parameter again. - * @name: the name of the parameter - */ -#define kparam_unblock_sysfs_write(name) \ - do { \ - BUG_ON(!(__param_##name.perm & 0222)); \ - __kernel_param_unlock(); \ - } while (0) - -/** - * kparam_block_sysfs_read - make sure a parameter isn't read via sysfs. - * @name: the name of the parameter - * - * This also blocks sysfs writes. - */ -#define kparam_block_sysfs_read(name) \ - do { \ - BUG_ON(!(__param_##name.perm & 0444)); \ - __kernel_param_lock(); \ - } while (0) - -/** - * kparam_unblock_sysfs_read - allows sysfs to read a parameter again. - * @name: the name of the parameter - */ -#define kparam_unblock_sysfs_read(name) \ - do { \ - BUG_ON(!(__param_##name.perm & 0444)); \ - __kernel_param_unlock(); \ - } while (0) +#define module_param_call(name, _set, _get, arg, perm) \ + static const struct kernel_param_ops __param_ops_##name = \ + { .flags = 0, .set = _set, .get = _get }; \ + __module_param_call(MODULE_PARAM_PREFIX, \ + name, &__param_ops_##name, arg, perm, -1, 0) #ifdef CONFIG_SYSFS -extern void __kernel_param_lock(void); -extern void __kernel_param_unlock(void); +extern void kernel_param_lock(struct module *mod); +extern void kernel_param_unlock(struct module *mod); #else -static inline void __kernel_param_lock(void) +static inline void kernel_param_lock(struct module *mod) { } -static inline void __kernel_param_unlock(void) +static inline void kernel_param_unlock(struct module *mod) { } #endif @@ -270,7 +338,33 @@ static inline void __kernel_param_unlock(void) */ #define core_param(name, var, type, perm) \ param_check_##type(name, &(var)); \ - __module_param_call("", name, ¶m_ops_##type, &var, perm, -1) + __module_param_call("", name, ¶m_ops_##type, &var, perm, -1, 0) + +/** + * core_param_unsafe - same as core_param but taints kernel + * @name: the name of the cmdline and sysfs parameter (often the same as var) + * @var: the variable + * @type: the type of the parameter + * @perm: visibility in sysfs + */ +#define core_param_unsafe(name, var, type, perm) \ + param_check_##type(name, &(var)); \ + __module_param_call("", name, ¶m_ops_##type, &var, perm, \ + -1, KERNEL_PARAM_FL_UNSAFE) + +/** + * __core_param_cb - similar like core_param, with a set/get ops instead of type. + * @name: the name of the cmdline and sysfs parameter (often the same as var) + * @var: the variable + * @ops: the set & get operations for this parameter. + * @perm: visibility in sysfs + * + * Ideally this should be called 'core_param_cb', but the name has been + * used for module core parameter, so add the '__' prefix + */ +#define __core_param_cb(name, ops, arg, perm) \ + __module_param_call("", name, ops, arg, perm, -1, 0) + #endif /* !MODULE */ /** @@ -288,7 +382,7 @@ static inline void __kernel_param_unlock(void) = { len, string }; \ __module_param_call(MODULE_PARAM_PREFIX, name, \ ¶m_ops_string, \ - .str = &__param_string_##name, perm, -1); \ + .str = &__param_string_##name, perm, -1, 0);\ __MODULE_PARM_TYPE(name, "string") /** @@ -311,15 +405,16 @@ extern bool parameq(const char *name1, const char *name2); */ extern bool parameqn(const char *name1, const char *name2, size_t n); +typedef int (*parse_unknown_fn)(char *param, char *val, const char *doing, void *arg); + /* Called on module insert or kernel boot */ -extern int parse_args(const char *name, +extern char *parse_args(const char *name, char *args, const struct kernel_param *params, unsigned num, s16 level_min, s16 level_max, - int (*unknown)(char *param, char *val, - const char *doing)); + void *arg, parse_unknown_fn unknown); /* Called by module remove. */ #ifdef CONFIG_SYSFS @@ -335,61 +430,80 @@ static inline void destroy_params(const struct kernel_param *params, /* The macros to do compile-time type checking stolen from Jakub Jelinek, who IIRC came up with this idea for the 2.4 module init code. */ #define __param_check(name, p, type) \ - static inline type *__check_##name(void) { return(p); } + static inline type __always_unused *__check_##name(void) { return(p); } -extern struct kernel_param_ops param_ops_byte; +extern const struct kernel_param_ops param_ops_byte; extern int param_set_byte(const char *val, const struct kernel_param *kp); extern int param_get_byte(char *buffer, const struct kernel_param *kp); #define param_check_byte(name, p) __param_check(name, p, unsigned char) -extern struct kernel_param_ops param_ops_short; +extern const struct kernel_param_ops param_ops_short; extern int param_set_short(const char *val, const struct kernel_param *kp); extern int param_get_short(char *buffer, const struct kernel_param *kp); #define param_check_short(name, p) __param_check(name, p, short) -extern struct kernel_param_ops param_ops_ushort; +extern const struct kernel_param_ops param_ops_ushort; extern int param_set_ushort(const char *val, const struct kernel_param *kp); extern int param_get_ushort(char *buffer, const struct kernel_param *kp); #define param_check_ushort(name, p) __param_check(name, p, unsigned short) -extern struct kernel_param_ops param_ops_int; +extern const struct kernel_param_ops param_ops_int; extern int param_set_int(const char *val, const struct kernel_param *kp); extern int param_get_int(char *buffer, const struct kernel_param *kp); #define param_check_int(name, p) __param_check(name, p, int) -extern struct kernel_param_ops param_ops_uint; +extern const struct kernel_param_ops param_ops_uint; extern int param_set_uint(const char *val, const struct kernel_param *kp); extern int param_get_uint(char *buffer, const struct kernel_param *kp); +int param_set_uint_minmax(const char *val, const struct kernel_param *kp, + unsigned int min, unsigned int max); #define param_check_uint(name, p) __param_check(name, p, unsigned int) -extern struct kernel_param_ops param_ops_long; +extern const struct kernel_param_ops param_ops_long; extern int param_set_long(const char *val, const struct kernel_param *kp); extern int param_get_long(char *buffer, const struct kernel_param *kp); #define param_check_long(name, p) __param_check(name, p, long) -extern struct kernel_param_ops param_ops_ulong; +extern const struct kernel_param_ops param_ops_ulong; extern int param_set_ulong(const char *val, const struct kernel_param *kp); extern int param_get_ulong(char *buffer, const struct kernel_param *kp); #define param_check_ulong(name, p) __param_check(name, p, unsigned long) -extern struct kernel_param_ops param_ops_charp; +extern const struct kernel_param_ops param_ops_ullong; +extern int param_set_ullong(const char *val, const struct kernel_param *kp); +extern int param_get_ullong(char *buffer, const struct kernel_param *kp); +#define param_check_ullong(name, p) __param_check(name, p, unsigned long long) + +extern const struct kernel_param_ops param_ops_hexint; +extern int param_set_hexint(const char *val, const struct kernel_param *kp); +extern int param_get_hexint(char *buffer, const struct kernel_param *kp); +#define param_check_hexint(name, p) param_check_uint(name, p) + +extern const struct kernel_param_ops param_ops_charp; extern int param_set_charp(const char *val, const struct kernel_param *kp); extern int param_get_charp(char *buffer, const struct kernel_param *kp); +extern void param_free_charp(void *arg); #define param_check_charp(name, p) __param_check(name, p, char *) /* We used to allow int as well as bool. We're taking that away! */ -extern struct kernel_param_ops param_ops_bool; +extern const struct kernel_param_ops param_ops_bool; extern int param_set_bool(const char *val, const struct kernel_param *kp); extern int param_get_bool(char *buffer, const struct kernel_param *kp); #define param_check_bool(name, p) __param_check(name, p, bool) -extern struct kernel_param_ops param_ops_invbool; +extern const struct kernel_param_ops param_ops_bool_enable_only; +extern int param_set_bool_enable_only(const char *val, + const struct kernel_param *kp); +/* getter is the same as for the regular bool */ +#define param_check_bool_enable_only param_check_bool + +extern const struct kernel_param_ops param_ops_invbool; extern int param_set_invbool(const char *val, const struct kernel_param *kp); extern int param_get_invbool(char *buffer, const struct kernel_param *kp); #define param_check_invbool(name, p) __param_check(name, p, bool) /* An int, which can only be set like a bool (though it shows as an int). */ -extern struct kernel_param_ops param_ops_bint; +extern const struct kernel_param_ops param_ops_bint; extern int param_set_bint(const char *val, const struct kernel_param *kp); #define param_get_bint param_get_int #define param_check_bint param_check_int @@ -430,12 +544,73 @@ extern int param_set_bint(const char *val, const struct kernel_param *kp); __module_param_call(MODULE_PARAM_PREFIX, name, \ ¶m_array_ops, \ .arr = &__param_arr_##name, \ - perm, -1); \ + perm, -1, 0); \ + __MODULE_PARM_TYPE(name, "array of " #type) + +enum hwparam_type { + hwparam_ioport, /* Module parameter configures an I/O port */ + hwparam_iomem, /* Module parameter configures an I/O mem address */ + hwparam_ioport_or_iomem, /* Module parameter could be either, depending on other option */ + hwparam_irq, /* Module parameter configures an IRQ */ + hwparam_dma, /* Module parameter configures a DMA channel */ + hwparam_dma_addr, /* Module parameter configures a DMA buffer address */ + hwparam_other, /* Module parameter configures some other value */ +}; + +/** + * module_param_hw_named - A parameter representing a hw parameters + * @name: a valid C identifier which is the parameter name. + * @value: the actual lvalue to alter. + * @type: the type of the parameter + * @hwtype: what the value represents (enum hwparam_type) + * @perm: visibility in sysfs. + * + * Usually it's a good idea to have variable names and user-exposed names the + * same, but that's harder if the variable must be non-static or is inside a + * structure. This allows exposure under a different name. + */ +#define module_param_hw_named(name, value, type, hwtype, perm) \ + param_check_##type(name, &(value)); \ + __module_param_call(MODULE_PARAM_PREFIX, name, \ + ¶m_ops_##type, &value, \ + perm, -1, \ + KERNEL_PARAM_FL_HWPARAM | (hwparam_##hwtype & 0)); \ + __MODULE_PARM_TYPE(name, #type) + +#define module_param_hw(name, type, hwtype, perm) \ + module_param_hw_named(name, name, type, hwtype, perm) + +/** + * module_param_hw_array - A parameter representing an array of hw parameters + * @name: the name of the array variable + * @type: the type, as per module_param() + * @hwtype: what the value represents (enum hwparam_type) + * @nump: optional pointer filled in with the number written + * @perm: visibility in sysfs + * + * Input and output are as comma-separated values. Commas inside values + * don't work properly (eg. an array of charp). + * + * ARRAY_SIZE(@name) is used to determine the number of elements in the + * array, so the definition must be visible. + */ +#define module_param_hw_array(name, type, hwtype, nump, perm) \ + param_check_##type(name, &(name)[0]); \ + static const struct kparam_array __param_arr_##name \ + = { .max = ARRAY_SIZE(name), .num = nump, \ + .ops = ¶m_ops_##type, \ + .elemsize = sizeof(name[0]), .elem = name }; \ + __module_param_call(MODULE_PARAM_PREFIX, name, \ + ¶m_array_ops, \ + .arr = &__param_arr_##name, \ + perm, -1, \ + KERNEL_PARAM_FL_HWPARAM | (hwparam_##hwtype & 0)); \ __MODULE_PARM_TYPE(name, "array of " #type) -extern struct kernel_param_ops param_array_ops; -extern struct kernel_param_ops param_ops_string; +extern const struct kernel_param_ops param_array_ops; + +extern const struct kernel_param_ops param_ops_string; extern int param_set_copystring(const char *val, const struct kernel_param *); extern int param_get_string(char *buffer, const struct kernel_param *kp); |