1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_MODULE_PARAMS_H
3 #define _LINUX_MODULE_PARAMS_H
4 /* (C) Copyright 2001, 2002 Rusty Russell IBM Corporation */
5 #include <linux/init.h>
6 #include <linux/stringify.h>
7 #include <linux/kernel.h>
8
9 /* You can override this manually, but generally this should match the
10 module name. */
11 #ifdef MODULE
12 #define MODULE_PARAM_PREFIX /* empty */
13 #define __MODULE_INFO_PREFIX /* empty */
14 #else
15 #define MODULE_PARAM_PREFIX KBUILD_MODNAME "."
16 /* We cannot use MODULE_PARAM_PREFIX because some modules override it. */
17 #define __MODULE_INFO_PREFIX KBUILD_MODNAME "."
18 #endif
19
20 /* Chosen so that structs with an unsigned long line up. */
21 #define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
22
23 #define __MODULE_INFO(tag, name, info) \
24 static const char __UNIQUE_ID(name)[] \
25 __used __section(".modinfo") __aligned(1) \
26 = __MODULE_INFO_PREFIX __stringify(tag) "=" info
27
28 #define __MODULE_PARM_TYPE(name, _type) \
29 __MODULE_INFO(parmtype, name##type, #name ":" _type)
30
31 /* One for each parameter, describing how to use it. Some files do
32 multiple of these per line, so can't just use MODULE_INFO. */
33 #define MODULE_PARM_DESC(_parm, desc) \
34 __MODULE_INFO(parm, _parm, #_parm ":" desc)
35
36 struct kernel_param;
37
38 /*
39 * Flags available for kernel_param_ops
40 *
41 * NOARG - the parameter allows for no argument (foo instead of foo=1)
42 */
43 enum {
44 KERNEL_PARAM_OPS_FL_NOARG = (1 << 0)
45 };
46
47 struct kernel_param_ops {
48 /* How the ops should behave */
49 unsigned int flags;
50 /* Returns 0, or -errno. arg is in kp->arg. */
51 int (*set)(const char *val, const struct kernel_param *kp);
52 /* Returns length written or -errno. Buffer is 4k (ie. be short!) */
53 int (*get)(char *buffer, const struct kernel_param *kp);
54 /* Optional function to free kp->arg when module unloaded. */
55 void (*free)(void *arg);
56 };
57
58 /*
59 * Flags available for kernel_param
60 *
61 * UNSAFE - the parameter is dangerous and setting it will taint the kernel
62 * HWPARAM - Hardware param not permitted in lockdown mode
63 */
64 enum {
65 KERNEL_PARAM_FL_UNSAFE = (1 << 0),
66 KERNEL_PARAM_FL_HWPARAM = (1 << 1),
67 };
68
69 struct kernel_param {
70 const char *name;
71 struct module *mod;
72 const struct kernel_param_ops *ops;
73 const u16 perm;
74 s8 level;
75 u8 flags;
76 union {
77 void *arg;
78 const struct kparam_string *str;
79 const struct kparam_array *arr;
80 };
81 };
82
83 extern const struct kernel_param __start___param[], __stop___param[];
84
85 /* Special one for strings we want to copy into */
86 struct kparam_string {
87 unsigned int maxlen;
88 char *string;
89 };
90
91 /* Special one for arrays */
92 struct kparam_array
93 {
94 unsigned int max;
95 unsigned int elemsize;
96 unsigned int *num;
97 const struct kernel_param_ops *ops;
98 void *elem;
99 };
100
101 /**
102 * module_param - typesafe helper for a module/cmdline parameter
103 * @name: the variable to alter, and exposed parameter name.
104 * @type: the type of the parameter
105 * @perm: visibility in sysfs.
106 *
107 * @name becomes the module parameter, or (prefixed by KBUILD_MODNAME and a
108 * ".") the kernel commandline parameter. Note that - is changed to _, so
109 * the user can use "foo-bar=1" even for variable "foo_bar".
110 *
111 * @perm is 0 if the variable is not to appear in sysfs, or 0444
112 * for world-readable, 0644 for root-writable, etc. Note that if it
113 * is writable, you may need to use kernel_param_lock() around
114 * accesses (esp. charp, which can be kfreed when it changes).
115 *
116 * The @type is simply pasted to refer to a param_ops_##type and a
117 * param_check_##type: for convenience many standard types are provided but
118 * you can create your own by defining those variables.
119 *
120 * Standard types are:
121 * byte, hexint, short, ushort, int, uint, long, ulong
122 * charp: a character pointer
123 * bool: a bool, values 0/1, y/n, Y/N.
124 * invbool: the above, only sense-reversed (N = true).
125 */
126 #define module_param(name, type, perm) \
127 module_param_named(name, name, type, perm)
128
129 /**
130 * module_param_unsafe - same as module_param but taints kernel
131 * @name: the variable to alter, and exposed parameter name.
132 * @type: the type of the parameter
133 * @perm: visibility in sysfs.
134 */
135 #define module_param_unsafe(name, type, perm) \
136 module_param_named_unsafe(name, name, type, perm)
137
138 /**
139 * module_param_named - typesafe helper for a renamed module/cmdline parameter
140 * @name: a valid C identifier which is the parameter name.
141 * @value: the actual lvalue to alter.
142 * @type: the type of the parameter
143 * @perm: visibility in sysfs.
144 *
145 * Usually it's a good idea to have variable names and user-exposed names the
146 * same, but that's harder if the variable must be non-static or is inside a
147 * structure. This allows exposure under a different name.
148 */
149 #define module_param_named(name, value, type, perm) \
150 param_check_##type(name, &(value)); \
151 module_param_cb(name, ¶m_ops_##type, &value, perm); \
152 __MODULE_PARM_TYPE(name, #type)
153
154 /**
155 * module_param_named_unsafe - same as module_param_named but taints kernel
156 * @name: a valid C identifier which is the parameter name.
157 * @value: the actual lvalue to alter.
158 * @type: the type of the parameter
159 * @perm: visibility in sysfs.
160 */
161 #define module_param_named_unsafe(name, value, type, perm) \
162 param_check_##type(name, &(value)); \
163 module_param_cb_unsafe(name, ¶m_ops_##type, &value, perm); \
164 __MODULE_PARM_TYPE(name, #type)
165
166 /**
167 * module_param_cb - general callback for a module/cmdline parameter
168 * @name: a valid C identifier which is the parameter name.
169 * @ops: the set & get operations for this parameter.
170 * @arg: args for @ops
171 * @perm: visibility in sysfs.
172 *
173 * The ops can have NULL set or get functions.
174 */
175 #define module_param_cb(name, ops, arg, perm) \
176 __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0)
177
178 #define module_param_cb_unsafe(name, ops, arg, perm) \
179 __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, \
180 KERNEL_PARAM_FL_UNSAFE)
181
182 #define __level_param_cb(name, ops, arg, perm, level) \
183 __module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, level, 0)
184 /**
185 * core_param_cb - general callback for a module/cmdline parameter
186 * to be evaluated before core initcall level
187 * @name: a valid C identifier which is the parameter name.
188 * @ops: the set & get operations for this parameter.
189 * @arg: args for @ops
190 * @perm: visibility in sysfs.
191 *
192 * The ops can have NULL set or get functions.
193 */
194 #define core_param_cb(name, ops, arg, perm) \
195 __level_param_cb(name, ops, arg, perm, 1)
196
197 /**
198 * postcore_param_cb - general callback for a module/cmdline parameter
199 * to be evaluated before postcore initcall level
200 * @name: a valid C identifier which is the parameter name.
201 * @ops: the set & get operations for this parameter.
202 * @arg: args for @ops
203 * @perm: visibility in sysfs.
204 *
205 * The ops can have NULL set or get functions.
206 */
207 #define postcore_param_cb(name, ops, arg, perm) \
208 __level_param_cb(name, ops, arg, perm, 2)
209
210 /**
211 * arch_param_cb - general callback for a module/cmdline parameter
212 * to be evaluated before arch initcall level
213 * @name: a valid C identifier which is the parameter name.
214 * @ops: the set & get operations for this parameter.
215 * @arg: args for @ops
216 * @perm: visibility in sysfs.
217 *
218 * The ops can have NULL set or get functions.
219 */
220 #define arch_param_cb(name, ops, arg, perm) \
221 __level_param_cb(name, ops, arg, perm, 3)
222
223 /**
224 * subsys_param_cb - general callback for a module/cmdline parameter
225 * to be evaluated before subsys initcall level
226 * @name: a valid C identifier which is the parameter name.
227 * @ops: the set & get operations for this parameter.
228 * @arg: args for @ops
229 * @perm: visibility in sysfs.
230 *
231 * The ops can have NULL set or get functions.
232 */
233 #define subsys_param_cb(name, ops, arg, perm) \
234 __level_param_cb(name, ops, arg, perm, 4)
235
236 /**
237 * fs_param_cb - general callback for a module/cmdline parameter
238 * to be evaluated before fs initcall level
239 * @name: a valid C identifier which is the parameter name.
240 * @ops: the set & get operations for this parameter.
241 * @arg: args for @ops
242 * @perm: visibility in sysfs.
243 *
244 * The ops can have NULL set or get functions.
245 */
246 #define fs_param_cb(name, ops, arg, perm) \
247 __level_param_cb(name, ops, arg, perm, 5)
248
249 /**
250 * device_param_cb - general callback for a module/cmdline parameter
251 * to be evaluated before device initcall level
252 * @name: a valid C identifier which is the parameter name.
253 * @ops: the set & get operations for this parameter.
254 * @arg: args for @ops
255 * @perm: visibility in sysfs.
256 *
257 * The ops can have NULL set or get functions.
258 */
259 #define device_param_cb(name, ops, arg, perm) \
260 __level_param_cb(name, ops, arg, perm, 6)
261
262 /**
263 * late_param_cb - general callback for a module/cmdline parameter
264 * to be evaluated before late initcall level
265 * @name: a valid C identifier which is the parameter name.
266 * @ops: the set & get operations for this parameter.
267 * @arg: args for @ops
268 * @perm: visibility in sysfs.
269 *
270 * The ops can have NULL set or get functions.
271 */
272 #define late_param_cb(name, ops, arg, perm) \
273 __level_param_cb(name, ops, arg, perm, 7)
274
275 /* On alpha, ia64 and ppc64 relocations to global data cannot go into
276 read-only sections (which is part of respective UNIX ABI on these
277 platforms). So 'const' makes no sense and even causes compile failures
278 with some compilers. */
279 #if defined(CONFIG_ALPHA) || defined(CONFIG_IA64) || defined(CONFIG_PPC64)
280 #define __moduleparam_const
281 #else
282 #define __moduleparam_const const
283 #endif
284
285 /* This is the fundamental function for registering boot/module
286 parameters. */
287 #define __module_param_call(prefix, name, ops, arg, perm, level, flags) \
288 /* Default value instead of permissions? */ \
289 static const char __param_str_##name[] = prefix #name; \
290 static struct kernel_param __moduleparam_const __param_##name \
291 __used __section("__param") \
292 __aligned(__alignof__(struct kernel_param)) \
293 = { __param_str_##name, THIS_MODULE, ops, \
294 VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg } }
295
296 /* Obsolete - use module_param_cb() */
297 #define module_param_call(name, _set, _get, arg, perm) \
298 static const struct kernel_param_ops __param_ops_##name = \
299 { .flags = 0, .set = _set, .get = _get }; \
300 __module_param_call(MODULE_PARAM_PREFIX, \
301 name, &__param_ops_##name, arg, perm, -1, 0)
302
303 #ifdef CONFIG_SYSFS
304 extern void kernel_param_lock(struct module *mod);
305 extern void kernel_param_unlock(struct module *mod);
306 #else
kernel_param_lock(struct module * mod)307 static inline void kernel_param_lock(struct module *mod)
308 {
309 }
kernel_param_unlock(struct module * mod)310 static inline void kernel_param_unlock(struct module *mod)
311 {
312 }
313 #endif
314
315 #ifndef MODULE
316 /**
317 * core_param - define a historical core kernel parameter.
318 * @name: the name of the cmdline and sysfs parameter (often the same as var)
319 * @var: the variable
320 * @type: the type of the parameter
321 * @perm: visibility in sysfs
322 *
323 * core_param is just like module_param(), but cannot be modular and
324 * doesn't add a prefix (such as "printk."). This is for compatibility
325 * with __setup(), and it makes sense as truly core parameters aren't
326 * tied to the particular file they're in.
327 */
328 #define core_param(name, var, type, perm) \
329 param_check_##type(name, &(var)); \
330 __module_param_call("", name, ¶m_ops_##type, &var, perm, -1, 0)
331
332 /**
333 * core_param_unsafe - same as core_param but taints kernel
334 * @name: the name of the cmdline and sysfs parameter (often the same as var)
335 * @var: the variable
336 * @type: the type of the parameter
337 * @perm: visibility in sysfs
338 */
339 #define core_param_unsafe(name, var, type, perm) \
340 param_check_##type(name, &(var)); \
341 __module_param_call("", name, ¶m_ops_##type, &var, perm, \
342 -1, KERNEL_PARAM_FL_UNSAFE)
343
344 #endif /* !MODULE */
345
346 /**
347 * module_param_string - a char array parameter
348 * @name: the name of the parameter
349 * @string: the string variable
350 * @len: the maximum length of the string, incl. terminator
351 * @perm: visibility in sysfs.
352 *
353 * This actually copies the string when it's set (unlike type charp).
354 * @len is usually just sizeof(string).
355 */
356 #define module_param_string(name, string, len, perm) \
357 static const struct kparam_string __param_string_##name \
358 = { len, string }; \
359 __module_param_call(MODULE_PARAM_PREFIX, name, \
360 ¶m_ops_string, \
361 .str = &__param_string_##name, perm, -1, 0);\
362 __MODULE_PARM_TYPE(name, "string")
363
364 /**
365 * parameq - checks if two parameter names match
366 * @name1: parameter name 1
367 * @name2: parameter name 2
368 *
369 * Returns true if the two parameter names are equal.
370 * Dashes (-) are considered equal to underscores (_).
371 */
372 extern bool parameq(const char *name1, const char *name2);
373
374 /**
375 * parameqn - checks if two parameter names match
376 * @name1: parameter name 1
377 * @name2: parameter name 2
378 * @n: the length to compare
379 *
380 * Similar to parameq(), except it compares @n characters.
381 */
382 extern bool parameqn(const char *name1, const char *name2, size_t n);
383
384 /* Called on module insert or kernel boot */
385 extern char *parse_args(const char *name,
386 char *args,
387 const struct kernel_param *params,
388 unsigned num,
389 s16 level_min,
390 s16 level_max,
391 void *arg,
392 int (*unknown)(char *param, char *val,
393 const char *doing, void *arg));
394
395 /* Called by module remove. */
396 #ifdef CONFIG_SYSFS
397 extern void destroy_params(const struct kernel_param *params, unsigned num);
398 #else
destroy_params(const struct kernel_param * params,unsigned num)399 static inline void destroy_params(const struct kernel_param *params,
400 unsigned num)
401 {
402 }
403 #endif /* !CONFIG_SYSFS */
404
405 /* All the helper functions */
406 /* The macros to do compile-time type checking stolen from Jakub
407 Jelinek, who IIRC came up with this idea for the 2.4 module init code. */
408 #define __param_check(name, p, type) \
409 static inline type __always_unused *__check_##name(void) { return(p); }
410
411 extern const struct kernel_param_ops param_ops_byte;
412 extern int param_set_byte(const char *val, const struct kernel_param *kp);
413 extern int param_get_byte(char *buffer, const struct kernel_param *kp);
414 #define param_check_byte(name, p) __param_check(name, p, unsigned char)
415
416 extern const struct kernel_param_ops param_ops_short;
417 extern int param_set_short(const char *val, const struct kernel_param *kp);
418 extern int param_get_short(char *buffer, const struct kernel_param *kp);
419 #define param_check_short(name, p) __param_check(name, p, short)
420
421 extern const struct kernel_param_ops param_ops_ushort;
422 extern int param_set_ushort(const char *val, const struct kernel_param *kp);
423 extern int param_get_ushort(char *buffer, const struct kernel_param *kp);
424 #define param_check_ushort(name, p) __param_check(name, p, unsigned short)
425
426 extern const struct kernel_param_ops param_ops_int;
427 extern int param_set_int(const char *val, const struct kernel_param *kp);
428 extern int param_get_int(char *buffer, const struct kernel_param *kp);
429 #define param_check_int(name, p) __param_check(name, p, int)
430
431 extern const struct kernel_param_ops param_ops_uint;
432 extern int param_set_uint(const char *val, const struct kernel_param *kp);
433 extern int param_get_uint(char *buffer, const struct kernel_param *kp);
434 int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
435 unsigned int min, unsigned int max);
436 #define param_check_uint(name, p) __param_check(name, p, unsigned int)
437
438 extern const struct kernel_param_ops param_ops_long;
439 extern int param_set_long(const char *val, const struct kernel_param *kp);
440 extern int param_get_long(char *buffer, const struct kernel_param *kp);
441 #define param_check_long(name, p) __param_check(name, p, long)
442
443 extern const struct kernel_param_ops param_ops_ulong;
444 extern int param_set_ulong(const char *val, const struct kernel_param *kp);
445 extern int param_get_ulong(char *buffer, const struct kernel_param *kp);
446 #define param_check_ulong(name, p) __param_check(name, p, unsigned long)
447
448 extern const struct kernel_param_ops param_ops_ullong;
449 extern int param_set_ullong(const char *val, const struct kernel_param *kp);
450 extern int param_get_ullong(char *buffer, const struct kernel_param *kp);
451 #define param_check_ullong(name, p) __param_check(name, p, unsigned long long)
452
453 extern const struct kernel_param_ops param_ops_hexint;
454 extern int param_set_hexint(const char *val, const struct kernel_param *kp);
455 extern int param_get_hexint(char *buffer, const struct kernel_param *kp);
456 #define param_check_hexint(name, p) param_check_uint(name, p)
457
458 extern const struct kernel_param_ops param_ops_charp;
459 extern int param_set_charp(const char *val, const struct kernel_param *kp);
460 extern int param_get_charp(char *buffer, const struct kernel_param *kp);
461 extern void param_free_charp(void *arg);
462 #define param_check_charp(name, p) __param_check(name, p, char *)
463
464 /* We used to allow int as well as bool. We're taking that away! */
465 extern const struct kernel_param_ops param_ops_bool;
466 extern int param_set_bool(const char *val, const struct kernel_param *kp);
467 extern int param_get_bool(char *buffer, const struct kernel_param *kp);
468 #define param_check_bool(name, p) __param_check(name, p, bool)
469
470 extern const struct kernel_param_ops param_ops_bool_enable_only;
471 extern int param_set_bool_enable_only(const char *val,
472 const struct kernel_param *kp);
473 /* getter is the same as for the regular bool */
474 #define param_check_bool_enable_only param_check_bool
475
476 extern const struct kernel_param_ops param_ops_invbool;
477 extern int param_set_invbool(const char *val, const struct kernel_param *kp);
478 extern int param_get_invbool(char *buffer, const struct kernel_param *kp);
479 #define param_check_invbool(name, p) __param_check(name, p, bool)
480
481 /* An int, which can only be set like a bool (though it shows as an int). */
482 extern const struct kernel_param_ops param_ops_bint;
483 extern int param_set_bint(const char *val, const struct kernel_param *kp);
484 #define param_get_bint param_get_int
485 #define param_check_bint param_check_int
486
487 /**
488 * module_param_array - a parameter which is an array of some type
489 * @name: the name of the array variable
490 * @type: the type, as per module_param()
491 * @nump: optional pointer filled in with the number written
492 * @perm: visibility in sysfs
493 *
494 * Input and output are as comma-separated values. Commas inside values
495 * don't work properly (eg. an array of charp).
496 *
497 * ARRAY_SIZE(@name) is used to determine the number of elements in the
498 * array, so the definition must be visible.
499 */
500 #define module_param_array(name, type, nump, perm) \
501 module_param_array_named(name, name, type, nump, perm)
502
503 /**
504 * module_param_array_named - renamed parameter which is an array of some type
505 * @name: a valid C identifier which is the parameter name
506 * @array: the name of the array variable
507 * @type: the type, as per module_param()
508 * @nump: optional pointer filled in with the number written
509 * @perm: visibility in sysfs
510 *
511 * This exposes a different name than the actual variable name. See
512 * module_param_named() for why this might be necessary.
513 */
514 #define module_param_array_named(name, array, type, nump, perm) \
515 param_check_##type(name, &(array)[0]); \
516 static const struct kparam_array __param_arr_##name \
517 = { .max = ARRAY_SIZE(array), .num = nump, \
518 .ops = ¶m_ops_##type, \
519 .elemsize = sizeof(array[0]), .elem = array }; \
520 __module_param_call(MODULE_PARAM_PREFIX, name, \
521 ¶m_array_ops, \
522 .arr = &__param_arr_##name, \
523 perm, -1, 0); \
524 __MODULE_PARM_TYPE(name, "array of " #type)
525
526 enum hwparam_type {
527 hwparam_ioport, /* Module parameter configures an I/O port */
528 hwparam_iomem, /* Module parameter configures an I/O mem address */
529 hwparam_ioport_or_iomem, /* Module parameter could be either, depending on other option */
530 hwparam_irq, /* Module parameter configures an IRQ */
531 hwparam_dma, /* Module parameter configures a DMA channel */
532 hwparam_dma_addr, /* Module parameter configures a DMA buffer address */
533 hwparam_other, /* Module parameter configures some other value */
534 };
535
536 /**
537 * module_param_hw_named - A parameter representing a hw parameters
538 * @name: a valid C identifier which is the parameter name.
539 * @value: the actual lvalue to alter.
540 * @type: the type of the parameter
541 * @hwtype: what the value represents (enum hwparam_type)
542 * @perm: visibility in sysfs.
543 *
544 * Usually it's a good idea to have variable names and user-exposed names the
545 * same, but that's harder if the variable must be non-static or is inside a
546 * structure. This allows exposure under a different name.
547 */
548 #define module_param_hw_named(name, value, type, hwtype, perm) \
549 param_check_##type(name, &(value)); \
550 __module_param_call(MODULE_PARAM_PREFIX, name, \
551 ¶m_ops_##type, &value, \
552 perm, -1, \
553 KERNEL_PARAM_FL_HWPARAM | (hwparam_##hwtype & 0)); \
554 __MODULE_PARM_TYPE(name, #type)
555
556 #define module_param_hw(name, type, hwtype, perm) \
557 module_param_hw_named(name, name, type, hwtype, perm)
558
559 /**
560 * module_param_hw_array - A parameter representing an array of hw parameters
561 * @name: the name of the array variable
562 * @type: the type, as per module_param()
563 * @hwtype: what the value represents (enum hwparam_type)
564 * @nump: optional pointer filled in with the number written
565 * @perm: visibility in sysfs
566 *
567 * Input and output are as comma-separated values. Commas inside values
568 * don't work properly (eg. an array of charp).
569 *
570 * ARRAY_SIZE(@name) is used to determine the number of elements in the
571 * array, so the definition must be visible.
572 */
573 #define module_param_hw_array(name, type, hwtype, nump, perm) \
574 param_check_##type(name, &(name)[0]); \
575 static const struct kparam_array __param_arr_##name \
576 = { .max = ARRAY_SIZE(name), .num = nump, \
577 .ops = ¶m_ops_##type, \
578 .elemsize = sizeof(name[0]), .elem = name }; \
579 __module_param_call(MODULE_PARAM_PREFIX, name, \
580 ¶m_array_ops, \
581 .arr = &__param_arr_##name, \
582 perm, -1, \
583 KERNEL_PARAM_FL_HWPARAM | (hwparam_##hwtype & 0)); \
584 __MODULE_PARM_TYPE(name, "array of " #type)
585
586
587 extern const struct kernel_param_ops param_array_ops;
588
589 extern const struct kernel_param_ops param_ops_string;
590 extern int param_set_copystring(const char *val, const struct kernel_param *);
591 extern int param_get_string(char *buffer, const struct kernel_param *kp);
592
593 /* for exporting parameters in /sys/module/.../parameters */
594
595 struct module;
596
597 #if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
598 extern int module_param_sysfs_setup(struct module *mod,
599 const struct kernel_param *kparam,
600 unsigned int num_params);
601
602 extern void module_param_sysfs_remove(struct module *mod);
603 #else
module_param_sysfs_setup(struct module * mod,const struct kernel_param * kparam,unsigned int num_params)604 static inline int module_param_sysfs_setup(struct module *mod,
605 const struct kernel_param *kparam,
606 unsigned int num_params)
607 {
608 return 0;
609 }
610
module_param_sysfs_remove(struct module * mod)611 static inline void module_param_sysfs_remove(struct module *mod)
612 { }
613 #endif
614
615 #endif /* _LINUX_MODULE_PARAMS_H */
616