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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_MODULE_H
2#define _LINUX_MODULE_H
3/*
4 * Dynamic loading of modules into the kernel.
5 *
6 * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
7 * Rewritten again by Rusty Russell, 2002
8 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/list.h>
10#include <linux/stat.h>
11#include <linux/compiler.h>
12#include <linux/cache.h>
13#include <linux/kmod.h>
14#include <linux/elf.h>
15#include <linux/stringify.h>
16#include <linux/kobject.h>
17#include <linux/moduleparam.h>
Mathieu Desnoyers8256e472007-10-18 23:41:06 -070018#include <linux/marker.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <asm/local.h>
20
21#include <asm/module.h>
22
23/* Not Yet Implemented */
24#define MODULE_SUPPORTED_DEVICE(name)
25
26/* v850 toolchain uses a `_' prefix for all user symbols */
27#ifndef MODULE_SYMBOL_PREFIX
28#define MODULE_SYMBOL_PREFIX ""
29#endif
30
31#define MODULE_NAME_LEN (64 - sizeof(unsigned long))
32
33struct kernel_symbol
34{
35 unsigned long value;
36 const char *name;
37};
38
39struct modversion_info
40{
41 unsigned long crc;
42 char name[MODULE_NAME_LEN];
43};
44
45struct module;
46
47struct module_attribute {
48 struct attribute attr;
49 ssize_t (*show)(struct module_attribute *, struct module *, char *);
50 ssize_t (*store)(struct module_attribute *, struct module *,
51 const char *, size_t count);
Matt Domschc988d2b2005-06-23 22:05:15 -070052 void (*setup)(struct module *, const char *);
53 int (*test)(struct module *);
54 void (*free)(struct module *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055};
56
57struct module_kobject
58{
59 struct kobject kobj;
60 struct module *mod;
Kay Sieversf30c53a2007-01-15 20:22:02 +010061 struct kobject *drivers_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062};
63
64/* These are either module local, or the kernel's dummy ones. */
65extern int init_module(void);
66extern void cleanup_module(void);
67
68/* Archs provide a method of finding the correct exception table. */
69struct exception_table_entry;
70
71const struct exception_table_entry *
72search_extable(const struct exception_table_entry *first,
73 const struct exception_table_entry *last,
74 unsigned long value);
75void sort_extable(struct exception_table_entry *start,
76 struct exception_table_entry *finish);
77void sort_main_extable(void);
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#ifdef MODULE
80#define MODULE_GENERIC_TABLE(gtype,name) \
81extern const struct gtype##_id __mod_##gtype##_table \
82 __attribute__ ((unused, alias(__stringify(name))))
83
84extern struct module __this_module;
85#define THIS_MODULE (&__this_module)
86#else /* !MODULE */
87#define MODULE_GENERIC_TABLE(gtype,name)
88#define THIS_MODULE ((struct module *)0)
89#endif
90
91/* Generic info of form tag = "info" */
92#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
93
94/* For userspace: you can also call me... */
95#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
96
97/*
98 * The following license idents are currently accepted as indicating free
99 * software modules
100 *
101 * "GPL" [GNU Public License v2 or later]
102 * "GPL v2" [GNU Public License v2]
103 * "GPL and additional rights" [GNU Public License v2 rights and more]
104 * "Dual BSD/GPL" [GNU Public License v2
105 * or BSD license choice]
Xose Vazquez Perez8d27e902006-06-23 02:05:13 -0700106 * "Dual MIT/GPL" [GNU Public License v2
107 * or MIT license choice]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 * "Dual MPL/GPL" [GNU Public License v2
109 * or Mozilla license choice]
110 *
111 * The following other idents are available
112 *
113 * "Proprietary" [Non free products]
114 *
115 * There are dual licensed components, but when running with Linux it is the
116 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
117 * is a GPL combined work.
118 *
119 * This exists for several reasons
120 * 1. So modinfo can show license info for users wanting to vet their setup
121 * is free
122 * 2. So the community can ignore bug reports including proprietary modules
123 * 3. So vendors can do likewise based on their own policies
124 */
125#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
126
Rene Herman108f39a2007-05-10 22:22:50 -0700127/* Author, ideally of form NAME[, NAME]*[ and NAME] */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
129
130/* What your module does. */
131#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
132
133/* One for each parameter, describing how to use it. Some files do
134 multiple of these per line, so can't just use MODULE_INFO. */
135#define MODULE_PARM_DESC(_parm, desc) \
136 __MODULE_INFO(parm, _parm, #_parm ":" desc)
137
138#define MODULE_DEVICE_TABLE(type,name) \
139 MODULE_GENERIC_TABLE(type##_device,name)
140
141/* Version of form [<epoch>:]<version>[-<extra-version>].
142 Or for CVS/RCS ID version, everything but the number is stripped.
143 <epoch>: A (small) unsigned integer which allows you to start versions
144 anew. If not mentioned, it's zero. eg. "2:1.0" is after
145 "1:2.0".
146 <version>: The <version> may contain only alphanumerics and the
147 character `.'. Ordered by numeric sort for numeric parts,
148 ascii sort for ascii parts (as per RPM or DEB algorithm).
149 <extraversion>: Like <version>, but inserted for local
150 customizations, eg "rh3" or "rusty1".
151
152 Using this automatically adds a checksum of the .c files and the
153 local headers in "srcversion".
154*/
155#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
156
Jon Masters187afbe2006-08-28 17:08:21 -0500157/* Optional firmware file (or files) needed by the module
158 * format is simply firmware file name. Multiple firmware
159 * files require multiple MODULE_FIRMWARE() specifiers */
160#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162/* Given an address, look for it in the exception tables */
163const struct exception_table_entry *search_exception_tables(unsigned long add);
164
165struct notifier_block;
166
167#ifdef CONFIG_MODULES
168
169/* Get/put a kernel symbol (calls must be symmetric) */
170void *__symbol_get(const char *symbol);
171void *__symbol_get_gpl(const char *symbol);
172#define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
173
174#ifndef __GENKSYMS__
175#ifdef CONFIG_MODVERSIONS
176/* Mark the CRC weak since genksyms apparently decides not to
177 * generate a checksums for some symbols */
178#define __CRC_SYMBOL(sym, sec) \
179 extern void *__crc_##sym __attribute__((weak)); \
180 static const unsigned long __kcrctab_##sym \
181 __attribute_used__ \
182 __attribute__((section("__kcrctab" sec), unused)) \
183 = (unsigned long) &__crc_##sym;
184#else
185#define __CRC_SYMBOL(sym, sec)
186#endif
187
188/* For every exported symbol, place a struct in the __ksymtab section */
189#define __EXPORT_SYMBOL(sym, sec) \
Patrick McHardya1a8fee2006-03-23 22:07:34 -0800190 extern typeof(sym) sym; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 __CRC_SYMBOL(sym, sec) \
192 static const char __kstrtab_##sym[] \
193 __attribute__((section("__ksymtab_strings"))) \
194 = MODULE_SYMBOL_PREFIX #sym; \
195 static const struct kernel_symbol __ksymtab_##sym \
196 __attribute_used__ \
197 __attribute__((section("__ksymtab" sec), unused)) \
198 = { (unsigned long)&sym, __kstrtab_##sym }
199
200#define EXPORT_SYMBOL(sym) \
201 __EXPORT_SYMBOL(sym, "")
202
203#define EXPORT_SYMBOL_GPL(sym) \
204 __EXPORT_SYMBOL(sym, "_gpl")
205
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800206#define EXPORT_SYMBOL_GPL_FUTURE(sym) \
207 __EXPORT_SYMBOL(sym, "_gpl_future")
208
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700209
210#ifdef CONFIG_UNUSED_SYMBOLS
211#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
212#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
213#else
214#define EXPORT_UNUSED_SYMBOL(sym)
215#define EXPORT_UNUSED_SYMBOL_GPL(sym)
216#endif
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218#endif
219
220struct module_ref
221{
222 local_t count;
223} ____cacheline_aligned;
224
225enum module_state
226{
227 MODULE_STATE_LIVE,
228 MODULE_STATE_COMING,
229 MODULE_STATE_GOING,
230};
231
232/* Similar stuff for section attributes. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233struct module_sect_attr
234{
235 struct module_attribute mattr;
Ian S. Nelson04b1db92006-09-29 02:01:31 -0700236 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 unsigned long address;
238};
239
240struct module_sect_attrs
241{
242 struct attribute_group grp;
Ian S. Nelson04b1db92006-09-29 02:01:31 -0700243 int nsections;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 struct module_sect_attr attrs[0];
245};
246
247struct module_param_attrs;
248
249struct module
250{
251 enum module_state state;
252
253 /* Member of list of modules */
254 struct list_head list;
255
256 /* Unique handle for this module */
257 char name[MODULE_NAME_LEN];
258
259 /* Sysfs stuff. */
260 struct module_kobject mkobj;
261 struct module_param_attrs *param_attrs;
Greg Kroah-Hartman03e88ae2006-02-16 13:50:23 -0800262 struct module_attribute *modinfo_attrs;
Matt Domschc988d2b2005-06-23 22:05:15 -0700263 const char *version;
264 const char *srcversion;
Kay Sievers270a6c42007-01-18 13:26:15 +0100265 struct kobject *holders_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 /* Exported symbols */
268 const struct kernel_symbol *syms;
269 unsigned int num_syms;
270 const unsigned long *crcs;
271
272 /* GPL-only exported symbols. */
273 const struct kernel_symbol *gpl_syms;
274 unsigned int num_gpl_syms;
275 const unsigned long *gpl_crcs;
276
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700277 /* unused exported symbols. */
278 const struct kernel_symbol *unused_syms;
279 unsigned int num_unused_syms;
280 const unsigned long *unused_crcs;
281 /* GPL-only, unused exported symbols. */
282 const struct kernel_symbol *unused_gpl_syms;
283 unsigned int num_unused_gpl_syms;
284 const unsigned long *unused_gpl_crcs;
285
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800286 /* symbols that will be GPL-only in the near future. */
287 const struct kernel_symbol *gpl_future_syms;
288 unsigned int num_gpl_future_syms;
289 const unsigned long *gpl_future_crcs;
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 /* Exception table */
292 unsigned int num_exentries;
293 const struct exception_table_entry *extable;
294
295 /* Startup function. */
296 int (*init)(void);
297
298 /* If this is non-NULL, vfree after init() returns */
299 void *module_init;
300
301 /* Here is the actual code + data, vfree'd on unload. */
302 void *module_core;
303
304 /* Here are the sizes of the init and core sections */
305 unsigned long init_size, core_size;
306
307 /* The size of the executable code in each section. */
308 unsigned long init_text_size, core_text_size;
309
Jan Beulich4552d5d2006-06-26 13:57:28 +0200310 /* The handle returned from unwind_add_table. */
311 void *unwind_info;
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 /* Arch-specific module values */
314 struct mod_arch_specific arch;
315
Randy Dunlap2bc2d612006-10-02 02:17:02 -0700316 unsigned int taints; /* same bits as kernel:tainted */
317
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800318#ifdef CONFIG_GENERIC_BUG
319 /* Support for BUG */
320 struct list_head bug_list;
321 struct bug_entry *bug_table;
322 unsigned num_bugs;
323#endif
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325#ifdef CONFIG_MODULE_UNLOAD
326 /* Reference counts */
327 struct module_ref ref[NR_CPUS];
328
329 /* What modules depend on me? */
330 struct list_head modules_which_use_me;
331
332 /* Who is waiting for us to be unloaded */
333 struct task_struct *waiter;
334
335 /* Destruction function. */
336 void (*exit)(void);
337#endif
338
339#ifdef CONFIG_KALLSYMS
340 /* We keep the symbol and string tables for kallsyms. */
341 Elf_Sym *symtab;
342 unsigned long num_symtab;
343 char *strtab;
344
345 /* Section attributes */
346 struct module_sect_attrs *sect_attrs;
Roland McGrath6d760132007-10-16 23:26:40 -0700347
348 /* Notes attributes */
349 struct module_notes_attrs *notes_attrs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350#endif
351
352 /* Per-cpu data. */
353 void *percpu;
354
355 /* The command line arguments (may be mangled). People like
356 keeping pointers to this stuff */
357 char *args;
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700358#ifdef CONFIG_MARKERS
359 struct marker *markers;
360 unsigned int num_markers;
361#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362};
Roman Zippele61a1c12007-05-09 02:35:15 -0700363#ifndef MODULE_ARCH_INIT
364#define MODULE_ARCH_INIT {}
365#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367/* FIXME: It'd be nice to isolate modules during init, too, so they
368 aren't used before they (may) fail. But presently too much code
369 (IDE & SCSI) require entry into the module during init.*/
370static inline int module_is_live(struct module *mod)
371{
372 return mod->state != MODULE_STATE_GOING;
373}
374
375/* Is this address in a module? (second is with no locks, for oops) */
376struct module *module_text_address(unsigned long addr);
377struct module *__module_text_address(unsigned long addr);
Ingo Molnar4d435f92006-07-03 00:24:24 -0700378int is_module_address(unsigned long addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Alexey Dobriyanea078902007-05-08 00:28:39 -0700380/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 symnum out of range. */
Alexey Dobriyanea078902007-05-08 00:28:39 -0700382int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
383 char *name, char *module_name, int *exported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385/* Look for this name: can be of form module:name. */
386unsigned long module_kallsyms_lookup_name(const char *name);
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388extern void __module_put_and_exit(struct module *mod, long code)
389 __attribute__((noreturn));
390#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
391
392#ifdef CONFIG_MODULE_UNLOAD
393unsigned int module_refcount(struct module *mod);
394void __symbol_put(const char *symbol);
395#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
396void symbol_put_addr(void *addr);
397
398/* Sometimes we know we already have a refcount, and it's easier not
399 to handle the error case (which only happens with rmmod --wait). */
400static inline void __module_get(struct module *module)
401{
402 if (module) {
403 BUG_ON(module_refcount(module) == 0);
404 local_inc(&module->ref[get_cpu()].count);
405 put_cpu();
406 }
407}
408
409static inline int try_module_get(struct module *module)
410{
411 int ret = 1;
412
413 if (module) {
414 unsigned int cpu = get_cpu();
415 if (likely(module_is_live(module)))
416 local_inc(&module->ref[cpu].count);
417 else
418 ret = 0;
419 put_cpu();
420 }
421 return ret;
422}
423
Al Virof6a57032006-10-18 01:47:25 -0400424extern void module_put(struct module *module);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426#else /*!CONFIG_MODULE_UNLOAD*/
427static inline int try_module_get(struct module *module)
428{
429 return !module || module_is_live(module);
430}
431static inline void module_put(struct module *module)
432{
433}
434static inline void __module_get(struct module *module)
435{
436}
437#define symbol_put(x) do { } while(0)
438#define symbol_put_addr(p) do { } while(0)
439
440#endif /* CONFIG_MODULE_UNLOAD */
441
442/* This is a #define so the string doesn't get put in every .o file */
443#define module_name(mod) \
444({ \
445 struct module *__mod = (mod); \
446 __mod ? __mod->name : "kernel"; \
447})
448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449/* For kallsyms to ask for address resolution. NULL means not found. */
450const char *module_address_lookup(unsigned long addr,
451 unsigned long *symbolsize,
452 unsigned long *offset,
453 char **modname);
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700454int lookup_module_symbol_name(unsigned long addr, char *symname);
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700455int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457/* For extable.c to search modules' exception tables. */
458const struct exception_table_entry *search_module_extables(unsigned long addr);
459
460int register_module_notifier(struct notifier_block * nb);
461int unregister_module_notifier(struct notifier_block * nb);
462
463extern void print_modules(void);
464
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700465extern void module_update_markers(struct module *probe_module, int *refcount);
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467#else /* !CONFIG_MODULES... */
468#define EXPORT_SYMBOL(sym)
469#define EXPORT_SYMBOL_GPL(sym)
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800470#define EXPORT_SYMBOL_GPL_FUTURE(sym)
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700471#define EXPORT_UNUSED_SYMBOL(sym)
472#define EXPORT_UNUSED_SYMBOL_GPL(sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474/* Given an address, look for it in the exception tables. */
475static inline const struct exception_table_entry *
476search_module_extables(unsigned long addr)
477{
478 return NULL;
479}
480
481/* Is this address in a module? */
482static inline struct module *module_text_address(unsigned long addr)
483{
484 return NULL;
485}
486
487/* Is this address in a module? (don't take a lock, we're oopsing) */
488static inline struct module *__module_text_address(unsigned long addr)
489{
490 return NULL;
491}
492
Ingo Molnar4d435f92006-07-03 00:24:24 -0700493static inline int is_module_address(unsigned long addr)
494{
495 return 0;
496}
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498/* Get/put a kernel symbol (calls should be symmetric) */
499#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
500#define symbol_put(x) do { } while(0)
501#define symbol_put_addr(x) do { } while(0)
502
503static inline void __module_get(struct module *module)
504{
505}
506
507static inline int try_module_get(struct module *module)
508{
509 return 1;
510}
511
512static inline void module_put(struct module *module)
513{
514}
515
516#define module_name(mod) "kernel"
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518/* For kallsyms to ask for address resolution. NULL means not found. */
519static inline const char *module_address_lookup(unsigned long addr,
520 unsigned long *symbolsize,
521 unsigned long *offset,
522 char **modname)
523{
524 return NULL;
525}
526
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700527static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
528{
529 return -ERANGE;
530}
531
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700532static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
533{
534 return -ERANGE;
535}
536
Alexey Dobriyanea078902007-05-08 00:28:39 -0700537static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
538 char *type, char *name,
539 char *module_name, int *exported)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540{
Alexey Dobriyanea078902007-05-08 00:28:39 -0700541 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
544static inline unsigned long module_kallsyms_lookup_name(const char *name)
545{
546 return 0;
547}
548
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549static inline int register_module_notifier(struct notifier_block * nb)
550{
551 /* no events will happen anyway, so this can always succeed */
552 return 0;
553}
554
555static inline int unregister_module_notifier(struct notifier_block * nb)
556{
557 return 0;
558}
559
560#define module_put_and_exit(code) do_exit(code)
561
562static inline void print_modules(void)
563{
564}
565
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700566static inline void module_update_markers(struct module *probe_module,
567 int *refcount)
568{
569}
570
Randy Dunlapef665c12007-02-13 15:19:06 -0800571#endif /* CONFIG_MODULES */
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573struct device_driver;
Randy Dunlapef665c12007-02-13 15:19:06 -0800574#ifdef CONFIG_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575struct module;
576
Greg Kroah-Hartman823bccf2007-04-13 13:15:19 -0700577extern struct kset module_subsys;
Randy Dunlapef665c12007-02-13 15:19:06 -0800578
579int mod_sysfs_init(struct module *mod);
580int mod_sysfs_setup(struct module *mod,
581 struct kernel_param *kparam,
582 unsigned int num_params);
583int module_add_modinfo_attrs(struct module *mod);
584void module_remove_modinfo_attrs(struct module *mod);
585
586#else /* !CONFIG_SYSFS */
587
588static inline int mod_sysfs_init(struct module *mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{
Randy Dunlapef665c12007-02-13 15:19:06 -0800590 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591}
592
Randy Dunlapef665c12007-02-13 15:19:06 -0800593static inline int mod_sysfs_setup(struct module *mod,
594 struct kernel_param *kparam,
595 unsigned int num_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596{
Randy Dunlapef665c12007-02-13 15:19:06 -0800597 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
599
Randy Dunlapef665c12007-02-13 15:19:06 -0800600static inline int module_add_modinfo_attrs(struct module *mod)
601{
602 return 0;
603}
604
605static inline void module_remove_modinfo_attrs(struct module *mod)
606{ }
607
608#endif /* CONFIG_SYSFS */
609
610#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
611
612void module_add_driver(struct module *mod, struct device_driver *drv);
613void module_remove_driver(struct device_driver *drv);
614
615#else /* not both CONFIG_SYSFS && CONFIG_MODULES */
616
617static inline void module_add_driver(struct module *mod, struct device_driver *drv)
618{ }
619
620static inline void module_remove_driver(struct device_driver *drv)
621{ }
622
623#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
625#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
626
627/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629#define __MODULE_STRING(x) __stringify(x)
630
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631#endif /* _LINUX_MODULE_H */