[net-next-2.6.git] / include / linux / moduleparam.h

#ifndef _LINUX_MODULE_PARAMS_H
#define _LINUX_MODULE_PARAMS_H
/* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */
#include <linux/init.h>
#include <linux/stringify.h>
#include <linux/kernel.h>

/* You can override this manually, but generally this should match the
   module name. */
#ifdef MODULE
#define MODULE_PARAM_PREFIX /* empty */
#else
#define MODULE_PARAM_PREFIX KBUILD_MODNAME "."
#endif

/* Chosen so that structs with an unsigned long line up. */
#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))

#ifdef MODULE
#define ___module_cat(a,b) __mod_ ## a ## b
#define __module_cat(a,b) ___module_cat(a,b)
#define __MODULE_INFO(tag, name, info)					  \
static const char __module_cat(name,__LINE__)[]				  \
  __used								  \
  __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
#else  /* !MODULE */
#define __MODULE_INFO(tag, name, info)
#endif
#define __MODULE_PARM_TYPE(name, _type)					  \
  __MODULE_INFO(parmtype, name##type, #name ":" _type)

struct kernel_param;

struct kernel_param_ops {
	/* 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!) */
	int (*get)(char *buffer, const struct kernel_param *kp);
	/* Optional function to free kp->arg when module unloaded. */
	void (*free)(void *arg);
};

/* Flag bits for kernel_param.flags */
#define KPARAM_ISBOOL		2

struct kernel_param {
	const char *name;
	const struct kernel_param_ops *ops;
	u16 perm;
	u16 flags;
	union {
		void *arg;
		const struct kparam_string *str;
		const struct kparam_array *arr;
	};
};

/* Special one for strings we want to copy into */
struct kparam_string {
	unsigned int maxlen;
	char *string;
};

/* Special one for arrays */
struct kparam_array
{
	unsigned int max;
	unsigned int *num;
	const struct kernel_param_ops *ops;
	unsigned int elemsize;
	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
   writable. */
#define __module_param_call(prefix, name, ops, arg, isbool, perm)	\
	/* 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);	\
	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, isbool ? KPARAM_ISBOOL : 0,	\
	    { 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,		\
			    __same_type(*(arg), bool),			\
			    (perm) + sizeof(__check_old_set_param(set))*0)

/* 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;
}

#define module_param_cb(name, ops, arg, perm)				      \
	__module_param_call(MODULE_PARAM_PREFIX,			      \
			    name, ops, arg, __same_type(*(arg), bool), perm)

/*
 * Helper functions: type is byte, short, ushort, int, uint, long,
 * ulong, charp, bool or invbool, or XXX if you define param_ops_XXX
 * and param_check_XXX.
 */
#define module_param_named(name, value, type, perm)			   \
	param_check_##type(name, &(value));				   \
	module_param_cb(name, &param_ops_##type, &value, perm);		   \
	__MODULE_PARM_TYPE(name, #type)

#define module_param(name, type, perm)				\
	module_param_named(name, name, type, perm)

#ifndef MODULE
/**
 * core_param - define a historical core kernel parameter.
 * @name: the name of the cmdline and sysfs parameter (often the same as var)
 * @var: the variable
 * @type: the type (for param_set_##type and param_get_##type)
 * @perm: visibility in sysfs
 *
 * core_param is just like module_param(), but cannot be modular and
 * doesn't add a prefix (such as "printk.").  This is for compatibility
 * with __setup(), and it makes sense as truly core parameters aren't
 * tied to the particular file they're in.
 */
#define core_param(name, var, type, perm)				\
	param_check_##type(name, &(var));				\
	__module_param_call("", name, &param_ops_##type,		\
			    &var, __same_type(var, bool), perm)
#endif /* !MODULE */

/* Actually copy string: maxlen param is usually sizeof(string). */
#define module_param_string(name, string, len, perm)			\
	static const struct kparam_string __param_string_##name		\
		= { len, string };					\
	__module_param_call(MODULE_PARAM_PREFIX, name,			\
			    &param_ops_string,				\
			    .str = &__param_string_##name, 0, perm);	\
	__MODULE_PARM_TYPE(name, "string")

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

/* Called by module remove. */
#ifdef CONFIG_SYSFS
extern void destroy_params(const struct kernel_param *params, unsigned num);
#else
static inline void destroy_params(const struct kernel_param *params,
				  unsigned num)
{
}
#endif /* !CONFIG_SYSFS */

/* All the helper functions */
/* 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); }

extern 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 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 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 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 int param_set_uint(const char *val, const struct kernel_param *kp);
extern int param_get_uint(char *buffer, const struct kernel_param *kp);
#define param_check_uint(name, p) __param_check(name, p, unsigned int)

extern 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 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 int param_set_charp(const char *val, const struct kernel_param *kp);
extern int param_get_charp(char *buffer, const struct kernel_param *kp);
#define param_check_charp(name, p) __param_check(name, p, char *)

/* For historical reasons "bool" parameters can be (unsigned) "int". */
extern 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)					\
	static inline void __check_##name(void)				\
	{								\
		BUILD_BUG_ON(!__same_type(*(p), bool) &&		\
			     !__same_type(*(p), unsigned int) &&	\
			     !__same_type(*(p), int));			\
	}

extern 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)

/* Comma-separated array: *nump is set to number they actually specified. */
#define module_param_array_named(name, array, type, nump, perm)		\
	static const struct kparam_array __param_arr_##name		\
	= { ARRAY_SIZE(array), nump, &param_ops_##type,			\
	    sizeof(array[0]), array };					\
	__module_param_call(MODULE_PARAM_PREFIX, name,			\
			    &param_array_ops,				\
			    .arr = &__param_arr_##name,			\
			    __same_type(array[0], bool), perm);		\
	__MODULE_PARM_TYPE(name, "array of " #type)

#define module_param_array(name, type, nump, perm)		\
	module_param_array_named(name, name, type, nump, perm)

extern struct kernel_param_ops param_array_ops;

extern 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);

/* for exporting parameters in /sys/parameters */

struct module;

#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
extern int module_param_sysfs_setup(struct module *mod,
				    const 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,
			     const 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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_MODULE_PARAMS_H
	2	#define _LINUX_MODULE_PARAMS_H
	3	/* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */
	4	#include <linux/init.h>
	5	#include <linux/stringify.h>
	6	#include <linux/kernel.h>
	7
	8	/* You can override this manually, but generally this should match the
	9	module name. */
	10	#ifdef MODULE
	11	#define MODULE_PARAM_PREFIX /* empty */
	12	#else
367cb704	13	#define MODULE_PARAM_PREFIX KBUILD_MODNAME "."
1da177e4 LT	14	#endif
1da177e4 LT	15
730b69d2 RR	16	/* Chosen so that structs with an unsigned long line up. */
	17	#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
	18
1da177e4 LT	19	#ifdef MODULE
	20	#define ___module_cat(a,b) __mod_ ## a ## b
	21	#define __module_cat(a,b) ___module_cat(a,b)
	22	#define __MODULE_INFO(tag, name, info) \
	23	static const char __module_cat(name,__LINE__)[] \
3ff6eecc	24	__used \
1da177e4 LT	25	__attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
	26	#else /* !MODULE */
	27	#define __MODULE_INFO(tag, name, info)
	28	#endif
	29	#define __MODULE_PARM_TYPE(name, _type) \
	30	__MODULE_INFO(parmtype, name##type, #name ":" _type)
	31
	32	struct kernel_param;
	33
9bbb9e5a RR	34	struct kernel_param_ops {
	35	/* Returns 0, or -errno. arg is in kp->arg. */
	36	int (set)(const char val, const struct kernel_param *kp);
	37	/* Returns length written or -errno. Buffer is 4k (ie. be short!) */
	38	int (get)(char buffer, const struct kernel_param *kp);
e6df34a4 RR	39	/* Optional function to free kp->arg when module unloaded. */
e6df34a4 RR	40	void (free)(void arg);
9bbb9e5a	41	};
1da177e4	42
45fcc70c	43	/* Flag bits for kernel_param.flags */
fddd5201	44	#define KPARAM_ISBOOL 2
45fcc70c	45
1da177e4 LT	46	struct kernel_param {
1da177e4 LT	47	const char *name;
9bbb9e5a	48	const struct kernel_param_ops *ops;
45fcc70c RR	49	u16 perm;
45fcc70c RR	50	u16 flags;
22e48eaf JB	51	union {
	52	void *arg;
	53	const struct kparam_string *str;
	54	const struct kparam_array *arr;
	55	};
1da177e4 LT	56	};
	57
	58	/* Special one for strings we want to copy into */
	59	struct kparam_string {
	60	unsigned int maxlen;
	61	char *string;
	62	};
	63
	64	/* Special one for arrays */
	65	struct kparam_array
	66	{
	67	unsigned int max;
	68	unsigned int *num;
9bbb9e5a	69	const struct kernel_param_ops *ops;
1da177e4 LT	70	unsigned int elemsize;
	71	void *elem;
	72	};
	73
91d35dd9 IK	74	/* On alpha, ia64 and ppc64 relocations to global data cannot go into
	75	read-only sections (which is part of respective UNIX ABI on these
	76	platforms). So 'const' makes no sense and even causes compile failures
	77	with some compilers. */
	78	#if defined(CONFIG_ALPHA) \|\| defined(CONFIG_IA64) \|\| defined(CONFIG_PPC64)
	79	#define __moduleparam_const
	80	#else
	81	#define __moduleparam_const const
	82	#endif
	83
1da177e4	84	/* This is the fundamental function for registering boot/module
405ae7d3	85	parameters. perm sets the visibility in sysfs: 000 means it's
1da177e4 LT	86	not there, read bits mean it's readable, write bits mean it's
1da177e4 LT	87	writable. */
9bbb9e5a	88	#define __module_param_call(prefix, name, ops, arg, isbool, perm) \
9774a1f5 AD	89	/* Default value instead of permissions? */ \
9774a1f5 AD	90	static int __param_perm_check_##name __attribute__((unused)) = \
730b69d2 RR	91	BUILD_BUG_ON_ZERO((perm) < 0 \|\| (perm) > 0777 \|\| ((perm) & 2)) \
730b69d2 RR	92	+ BUILD_BUG_ON_ZERO(sizeof(""prefix) > MAX_PARAM_PREFIX_LEN); \
22e48eaf	93	static const char __param_str_##name[] = prefix #name; \
91d35dd9	94	static struct kernel_param __moduleparam_const __param_##name \
3ff6eecc	95	__used \
1da177e4	96	__attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
9bbb9e5a RR	97	= { __param_str_##name, ops, perm, isbool ? KPARAM_ISBOOL : 0, \
	98	{ arg } }
	99
	100	/* Obsolete - use module_param_cb() */
	101	#define module_param_call(name, set, get, arg, perm) \
	102	static struct kernel_param_ops __param_ops_##name = \
	103	{ (void )set, (void )get }; \
	104	__module_param_call(MODULE_PARAM_PREFIX, \
	105	name, &__param_ops_##name, arg, \
	106	__same_type(*(arg), bool), \
	107	(perm) + sizeof(__check_old_set_param(set))*0)
	108
	109	/* We don't get oldget: it's often a new-style param_get_uint, etc. */
	110	static inline int
	111	__check_old_set_param(int (oldset)(const char , struct kernel_param *))
	112	{
	113	return 0;
	114	}
1da177e4	115
9bbb9e5a	116	#define module_param_cb(name, ops, arg, perm) \
fddd5201	117	__module_param_call(MODULE_PARAM_PREFIX, \
9bbb9e5a	118	name, ops, arg, __same_type(*(arg), bool), perm)
1da177e4	119
9bbb9e5a RR	120	/*
	121	* Helper functions: type is byte, short, ushort, int, uint, long,
	122	* ulong, charp, bool or invbool, or XXX if you define param_ops_XXX
	123	* and param_check_XXX.
	124	*/
1da177e4 LT	125	#define module_param_named(name, value, type, perm) \
1da177e4 LT	126	param_check_##type(name, &(value)); \
9bbb9e5a	127	module_param_cb(name, &param_ops_##type, &value, perm); \
1da177e4 LT	128	__MODULE_PARM_TYPE(name, #type)
	129
	130	#define module_param(name, type, perm) \
	131	module_param_named(name, name, type, perm)
	132
67e67cea RR	133	#ifndef MODULE
	134	/**
	135	* core_param - define a historical core kernel parameter.
	136	* @name: the name of the cmdline and sysfs parameter (often the same as var)
	137	* @var: the variable
	138	* @type: the type (for param_set_##type and param_get_##type)
	139	* @perm: visibility in sysfs
	140	*
	141	* core_param is just like module_param(), but cannot be modular and
	142	* doesn't add a prefix (such as "printk."). This is for compatibility
	143	* with __setup(), and it makes sense as truly core parameters aren't
	144	* tied to the particular file they're in.
	145	*/
	146	#define core_param(name, var, type, perm) \
	147	param_check_##type(name, &(var)); \
9bbb9e5a	148	__module_param_call("", name, &param_ops_##type, \
fddd5201	149	&var, __same_type(var, bool), perm)
67e67cea RR	150	#endif /* !MODULE */
67e67cea RR	151
1da177e4 LT	152	/* Actually copy string: maxlen param is usually sizeof(string). */
1da177e4 LT	153	#define module_param_string(name, string, len, perm) \
22e48eaf	154	static const struct kparam_string __param_string_##name \
1da177e4	155	= { len, string }; \
fddd5201	156	__module_param_call(MODULE_PARAM_PREFIX, name, \
9bbb9e5a	157	&param_ops_string, \
fddd5201	158	.str = &__param_string_##name, 0, perm); \
1da177e4 LT	159	__MODULE_PARM_TYPE(name, "string")
	160
	161	/* Called on module insert or kernel boot */
	162	extern int parse_args(const char *name,
	163	char *args,
914dcaa8	164	const struct kernel_param *params,
1da177e4 LT	165	unsigned num,
	166	int (unknown)(char param, char *val));
	167
e180a6b7 RR	168	/* Called by module remove. */
	169	#ifdef CONFIG_SYSFS
	170	extern void destroy_params(const struct kernel_param *params, unsigned num);
	171	#else
	172	static inline void destroy_params(const struct kernel_param *params,
	173	unsigned num)
	174	{
	175	}
	176	#endif /* !CONFIG_SYSFS */
	177
1da177e4 LT	178	/* All the helper functions */
	179	/* The macros to do compile-time type checking stolen from Jakub
	180	Jelinek, who IIRC came up with this idea for the 2.4 module init code. */
	181	#define __param_check(name, p, type) \
	182	static inline type *__check_##name(void) { return(p); }
	183
9bbb9e5a RR	184	extern struct kernel_param_ops param_ops_byte;
	185	extern int param_set_byte(const char val, const struct kernel_param kp);
	186	extern int param_get_byte(char buffer, const struct kernel_param kp);
1da177e4 LT	187	#define param_check_byte(name, p) __param_check(name, p, unsigned char)
1da177e4 LT	188
9bbb9e5a RR	189	extern struct kernel_param_ops param_ops_short;
	190	extern int param_set_short(const char val, const struct kernel_param kp);
	191	extern int param_get_short(char buffer, const struct kernel_param kp);
1da177e4 LT	192	#define param_check_short(name, p) __param_check(name, p, short)
1da177e4 LT	193
9bbb9e5a RR	194	extern struct kernel_param_ops param_ops_ushort;
	195	extern int param_set_ushort(const char val, const struct kernel_param kp);
	196	extern int param_get_ushort(char buffer, const struct kernel_param kp);
1da177e4 LT	197	#define param_check_ushort(name, p) __param_check(name, p, unsigned short)
1da177e4 LT	198
9bbb9e5a RR	199	extern struct kernel_param_ops param_ops_int;
	200	extern int param_set_int(const char val, const struct kernel_param kp);
	201	extern int param_get_int(char buffer, const struct kernel_param kp);
1da177e4 LT	202	#define param_check_int(name, p) __param_check(name, p, int)
1da177e4 LT	203
9bbb9e5a RR	204	extern struct kernel_param_ops param_ops_uint;
	205	extern int param_set_uint(const char val, const struct kernel_param kp);
	206	extern int param_get_uint(char buffer, const struct kernel_param kp);
1da177e4 LT	207	#define param_check_uint(name, p) __param_check(name, p, unsigned int)
1da177e4 LT	208
9bbb9e5a RR	209	extern struct kernel_param_ops param_ops_long;
	210	extern int param_set_long(const char val, const struct kernel_param kp);
	211	extern int param_get_long(char buffer, const struct kernel_param kp);
1da177e4 LT	212	#define param_check_long(name, p) __param_check(name, p, long)
1da177e4 LT	213
9bbb9e5a RR	214	extern struct kernel_param_ops param_ops_ulong;
	215	extern int param_set_ulong(const char val, const struct kernel_param kp);
	216	extern int param_get_ulong(char buffer, const struct kernel_param kp);
1da177e4 LT	217	#define param_check_ulong(name, p) __param_check(name, p, unsigned long)
1da177e4 LT	218
9bbb9e5a RR	219	extern struct kernel_param_ops param_ops_charp;
	220	extern int param_set_charp(const char val, const struct kernel_param kp);
	221	extern int param_get_charp(char buffer, const struct kernel_param kp);
1da177e4 LT	222	#define param_check_charp(name, p) __param_check(name, p, char *)
1da177e4 LT	223
fddd5201	224	/* For historical reasons "bool" parameters can be (unsigned) "int". */
9bbb9e5a RR	225	extern struct kernel_param_ops param_ops_bool;
	226	extern int param_set_bool(const char val, const struct kernel_param kp);
	227	extern int param_get_bool(char buffer, const struct kernel_param kp);
fddd5201 RR	228	#define param_check_bool(name, p) \
	229	static inline void __check_##name(void) \
	230	{ \
	231	BUILD_BUG_ON(!__same_type(*(p), bool) && \
	232	!__same_type(*(p), unsigned int) && \
	233	!__same_type(*(p), int)); \
	234	}
1da177e4	235
9bbb9e5a RR	236	extern struct kernel_param_ops param_ops_invbool;
	237	extern int param_set_invbool(const char val, const struct kernel_param kp);
	238	extern int param_get_invbool(char buffer, const struct kernel_param kp);
9a71af2c	239	#define param_check_invbool(name, p) __param_check(name, p, bool)
1da177e4 LT	240
	241	/* Comma-separated array: nump is set to number they actually specified. /
	242	#define module_param_array_named(name, array, type, nump, perm) \
22e48eaf	243	static const struct kparam_array __param_arr_##name \
9bbb9e5a	244	= { ARRAY_SIZE(array), nump, &param_ops_##type, \
1da177e4	245	sizeof(array[0]), array }; \
fddd5201	246	__module_param_call(MODULE_PARAM_PREFIX, name, \
9bbb9e5a	247	&param_array_ops, \
fddd5201 RR	248	.arr = &__param_arr_##name, \
fddd5201 RR	249	__same_type(array[0], bool), perm); \
1da177e4 LT	250	__MODULE_PARM_TYPE(name, "array of " #type)
	251
	252	#define module_param_array(name, type, nump, perm) \
	253	module_param_array_named(name, name, type, nump, perm)
	254
9bbb9e5a	255	extern struct kernel_param_ops param_array_ops;
1da177e4	256
9bbb9e5a RR	257	extern struct kernel_param_ops param_ops_string;
	258	extern int param_set_copystring(const char val, const struct kernel_param );
	259	extern int param_get_string(char buffer, const struct kernel_param kp);
1da177e4	260
1da177e4 LT	261	/* for exporting parameters in /sys/parameters */
	262
	263	struct module;
	264
ef665c1a	265	#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
1da177e4	266	extern int module_param_sysfs_setup(struct module *mod,
9bbb9e5a	267	const struct kernel_param *kparam,
1da177e4 LT	268	unsigned int num_params);
	269
	270	extern void module_param_sysfs_remove(struct module *mod);
ef665c1a RD	271	#else
ef665c1a RD	272	static inline int module_param_sysfs_setup(struct module *mod,
9bbb9e5a	273	const struct kernel_param *kparam,
ef665c1a RD	274	unsigned int num_params)
	275	{
	276	return 0;
	277	}
	278
	279	static inline void module_param_sysfs_remove(struct module *mod)
	280	{ }
	281	#endif
1da177e4 LT	282
1da177e4 LT	283	#endif /* _LINUX_MODULE_PARAMS_H */