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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>
18#include <asm/local.h>
19
20#include <asm/module.h>
21
22/* Not Yet Implemented */
23#define MODULE_SUPPORTED_DEVICE(name)
24
25/* v850 toolchain uses a `_' prefix for all user symbols */
26#ifndef MODULE_SYMBOL_PREFIX
27#define MODULE_SYMBOL_PREFIX ""
28#endif
29
30#define MODULE_NAME_LEN (64 - sizeof(unsigned long))
31
32struct kernel_symbol
33{
34 unsigned long value;
35 const char *name;
36};
37
38struct modversion_info
39{
40 unsigned long crc;
41 char name[MODULE_NAME_LEN];
42};
43
44struct module;
45
46struct module_attribute {
47 struct attribute attr;
48 ssize_t (*show)(struct module_attribute *, struct module *, char *);
49 ssize_t (*store)(struct module_attribute *, struct module *,
50 const char *, size_t count);
Matt Domschc988d2b2005-06-23 22:05:15 -070051 void (*setup)(struct module *, const char *);
52 int (*test)(struct module *);
53 void (*free)(struct module *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054};
55
56struct module_kobject
57{
58 struct kobject kobj;
59 struct module *mod;
Kay Sieversf30c53a2007-01-15 20:22:02 +010060 struct kobject *drivers_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061};
62
63/* These are either module local, or the kernel's dummy ones. */
64extern int init_module(void);
65extern void cleanup_module(void);
66
67/* Archs provide a method of finding the correct exception table. */
68struct exception_table_entry;
69
70const struct exception_table_entry *
71search_extable(const struct exception_table_entry *first,
72 const struct exception_table_entry *last,
73 unsigned long value);
74void sort_extable(struct exception_table_entry *start,
75 struct exception_table_entry *finish);
76void sort_main_extable(void);
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#ifdef MODULE
79#define MODULE_GENERIC_TABLE(gtype,name) \
80extern const struct gtype##_id __mod_##gtype##_table \
81 __attribute__ ((unused, alias(__stringify(name))))
82
83extern struct module __this_module;
84#define THIS_MODULE (&__this_module)
85#else /* !MODULE */
86#define MODULE_GENERIC_TABLE(gtype,name)
87#define THIS_MODULE ((struct module *)0)
88#endif
89
90/* Generic info of form tag = "info" */
91#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
92
93/* For userspace: you can also call me... */
94#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
95
96/*
97 * The following license idents are currently accepted as indicating free
98 * software modules
99 *
100 * "GPL" [GNU Public License v2 or later]
101 * "GPL v2" [GNU Public License v2]
102 * "GPL and additional rights" [GNU Public License v2 rights and more]
103 * "Dual BSD/GPL" [GNU Public License v2
104 * or BSD license choice]
Xose Vazquez Perez8d27e902006-06-23 02:05:13 -0700105 * "Dual MIT/GPL" [GNU Public License v2
106 * or MIT license choice]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 * "Dual MPL/GPL" [GNU Public License v2
108 * or Mozilla license choice]
109 *
110 * The following other idents are available
111 *
112 * "Proprietary" [Non free products]
113 *
114 * There are dual licensed components, but when running with Linux it is the
115 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
116 * is a GPL combined work.
117 *
118 * This exists for several reasons
119 * 1. So modinfo can show license info for users wanting to vet their setup
120 * is free
121 * 2. So the community can ignore bug reports including proprietary modules
122 * 3. So vendors can do likewise based on their own policies
123 */
124#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
125
Rene Herman108f39a2007-05-10 22:22:50 -0700126/* Author, ideally of form NAME[, NAME]*[ and NAME] */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
128
129/* What your module does. */
130#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
131
132/* One for each parameter, describing how to use it. Some files do
133 multiple of these per line, so can't just use MODULE_INFO. */
134#define MODULE_PARM_DESC(_parm, desc) \
135 __MODULE_INFO(parm, _parm, #_parm ":" desc)
136
137#define MODULE_DEVICE_TABLE(type,name) \
138 MODULE_GENERIC_TABLE(type##_device,name)
139
140/* Version of form [<epoch>:]<version>[-<extra-version>].
141 Or for CVS/RCS ID version, everything but the number is stripped.
142 <epoch>: A (small) unsigned integer which allows you to start versions
143 anew. If not mentioned, it's zero. eg. "2:1.0" is after
144 "1:2.0".
145 <version>: The <version> may contain only alphanumerics and the
146 character `.'. Ordered by numeric sort for numeric parts,
147 ascii sort for ascii parts (as per RPM or DEB algorithm).
148 <extraversion>: Like <version>, but inserted for local
149 customizations, eg "rh3" or "rusty1".
150
151 Using this automatically adds a checksum of the .c files and the
152 local headers in "srcversion".
153*/
154#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
155
Jon Masters187afbe2006-08-28 17:08:21 -0500156/* Optional firmware file (or files) needed by the module
157 * format is simply firmware file name. Multiple firmware
158 * files require multiple MODULE_FIRMWARE() specifiers */
159#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161/* Given an address, look for it in the exception tables */
162const struct exception_table_entry *search_exception_tables(unsigned long add);
163
164struct notifier_block;
165
166#ifdef CONFIG_MODULES
167
168/* Get/put a kernel symbol (calls must be symmetric) */
169void *__symbol_get(const char *symbol);
170void *__symbol_get_gpl(const char *symbol);
171#define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
172
173#ifndef __GENKSYMS__
174#ifdef CONFIG_MODVERSIONS
175/* Mark the CRC weak since genksyms apparently decides not to
176 * generate a checksums for some symbols */
177#define __CRC_SYMBOL(sym, sec) \
178 extern void *__crc_##sym __attribute__((weak)); \
179 static const unsigned long __kcrctab_##sym \
180 __attribute_used__ \
181 __attribute__((section("__kcrctab" sec), unused)) \
182 = (unsigned long) &__crc_##sym;
183#else
184#define __CRC_SYMBOL(sym, sec)
185#endif
186
187/* For every exported symbol, place a struct in the __ksymtab section */
188#define __EXPORT_SYMBOL(sym, sec) \
Patrick McHardya1a8fee2006-03-23 22:07:34 -0800189 extern typeof(sym) sym; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 __CRC_SYMBOL(sym, sec) \
191 static const char __kstrtab_##sym[] \
192 __attribute__((section("__ksymtab_strings"))) \
193 = MODULE_SYMBOL_PREFIX #sym; \
194 static const struct kernel_symbol __ksymtab_##sym \
195 __attribute_used__ \
196 __attribute__((section("__ksymtab" sec), unused)) \
197 = { (unsigned long)&sym, __kstrtab_##sym }
198
199#define EXPORT_SYMBOL(sym) \
200 __EXPORT_SYMBOL(sym, "")
201
202#define EXPORT_SYMBOL_GPL(sym) \
203 __EXPORT_SYMBOL(sym, "_gpl")
204
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800205#define EXPORT_SYMBOL_GPL_FUTURE(sym) \
206 __EXPORT_SYMBOL(sym, "_gpl_future")
207
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700208
209#ifdef CONFIG_UNUSED_SYMBOLS
210#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
211#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
212#else
213#define EXPORT_UNUSED_SYMBOL(sym)
214#define EXPORT_UNUSED_SYMBOL_GPL(sym)
215#endif
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217#endif
218
219struct module_ref
220{
221 local_t count;
222} ____cacheline_aligned;
223
224enum module_state
225{
226 MODULE_STATE_LIVE,
227 MODULE_STATE_COMING,
228 MODULE_STATE_GOING,
229};
230
231/* Similar stuff for section attributes. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232struct module_sect_attr
233{
234 struct module_attribute mattr;
Ian S. Nelson04b1db92006-09-29 02:01:31 -0700235 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 unsigned long address;
237};
238
239struct module_sect_attrs
240{
241 struct attribute_group grp;
Ian S. Nelson04b1db92006-09-29 02:01:31 -0700242 int nsections;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 struct module_sect_attr attrs[0];
244};
245
246struct module_param_attrs;
247
248struct module
249{
250 enum module_state state;
251
252 /* Member of list of modules */
253 struct list_head list;
254
255 /* Unique handle for this module */
256 char name[MODULE_NAME_LEN];
257
258 /* Sysfs stuff. */
259 struct module_kobject mkobj;
260 struct module_param_attrs *param_attrs;
Greg Kroah-Hartman03e88ae12006-02-16 13:50:23 -0800261 struct module_attribute *modinfo_attrs;
Matt Domschc988d2b2005-06-23 22:05:15 -0700262 const char *version;
263 const char *srcversion;
Kay Sievers270a6c42007-01-18 13:26:15 +0100264 struct kobject *holders_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 /* Exported symbols */
267 const struct kernel_symbol *syms;
268 unsigned int num_syms;
269 const unsigned long *crcs;
270
271 /* GPL-only exported symbols. */
272 const struct kernel_symbol *gpl_syms;
273 unsigned int num_gpl_syms;
274 const unsigned long *gpl_crcs;
275
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700276 /* unused exported symbols. */
277 const struct kernel_symbol *unused_syms;
278 unsigned int num_unused_syms;
279 const unsigned long *unused_crcs;
280 /* GPL-only, unused exported symbols. */
281 const struct kernel_symbol *unused_gpl_syms;
282 unsigned int num_unused_gpl_syms;
283 const unsigned long *unused_gpl_crcs;
284
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800285 /* symbols that will be GPL-only in the near future. */
286 const struct kernel_symbol *gpl_future_syms;
287 unsigned int num_gpl_future_syms;
288 const unsigned long *gpl_future_crcs;
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /* Exception table */
291 unsigned int num_exentries;
292 const struct exception_table_entry *extable;
293
294 /* Startup function. */
295 int (*init)(void);
296
297 /* If this is non-NULL, vfree after init() returns */
298 void *module_init;
299
300 /* Here is the actual code + data, vfree'd on unload. */
301 void *module_core;
302
303 /* Here are the sizes of the init and core sections */
304 unsigned long init_size, core_size;
305
306 /* The size of the executable code in each section. */
307 unsigned long init_text_size, core_text_size;
308
Jan Beulich4552d5d2006-06-26 13:57:28 +0200309 /* The handle returned from unwind_add_table. */
310 void *unwind_info;
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 /* Arch-specific module values */
313 struct mod_arch_specific arch;
314
315 /* Am I unsafe to unload? */
316 int unsafe;
317
Randy Dunlap2bc2d612006-10-02 02:17:02 -0700318 unsigned int taints; /* same bits as kernel:tainted */
319
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800320#ifdef CONFIG_GENERIC_BUG
321 /* Support for BUG */
322 struct list_head bug_list;
323 struct bug_entry *bug_table;
324 unsigned num_bugs;
325#endif
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327#ifdef CONFIG_MODULE_UNLOAD
328 /* Reference counts */
329 struct module_ref ref[NR_CPUS];
330
331 /* What modules depend on me? */
332 struct list_head modules_which_use_me;
333
334 /* Who is waiting for us to be unloaded */
335 struct task_struct *waiter;
336
337 /* Destruction function. */
338 void (*exit)(void);
339#endif
340
341#ifdef CONFIG_KALLSYMS
342 /* We keep the symbol and string tables for kallsyms. */
343 Elf_Sym *symtab;
344 unsigned long num_symtab;
345 char *strtab;
346
347 /* Section attributes */
348 struct module_sect_attrs *sect_attrs;
349#endif
350
351 /* Per-cpu data. */
352 void *percpu;
353
354 /* The command line arguments (may be mangled). People like
355 keeping pointers to this stuff */
356 char *args;
357};
Roman Zippele61a1c12007-05-09 02:35:15 -0700358#ifndef MODULE_ARCH_INIT
359#define MODULE_ARCH_INIT {}
360#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362/* FIXME: It'd be nice to isolate modules during init, too, so they
363 aren't used before they (may) fail. But presently too much code
364 (IDE & SCSI) require entry into the module during init.*/
365static inline int module_is_live(struct module *mod)
366{
367 return mod->state != MODULE_STATE_GOING;
368}
369
370/* Is this address in a module? (second is with no locks, for oops) */
371struct module *module_text_address(unsigned long addr);
372struct module *__module_text_address(unsigned long addr);
Ingo Molnar4d435f92006-07-03 00:24:24 -0700373int is_module_address(unsigned long addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Alexey Dobriyanea078902007-05-08 00:28:39 -0700375/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 symnum out of range. */
Alexey Dobriyanea078902007-05-08 00:28:39 -0700377int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
378 char *name, char *module_name, int *exported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380/* Look for this name: can be of form module:name. */
381unsigned long module_kallsyms_lookup_name(const char *name);
382
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383extern void __module_put_and_exit(struct module *mod, long code)
384 __attribute__((noreturn));
385#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
386
387#ifdef CONFIG_MODULE_UNLOAD
388unsigned int module_refcount(struct module *mod);
389void __symbol_put(const char *symbol);
390#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
391void symbol_put_addr(void *addr);
392
393/* Sometimes we know we already have a refcount, and it's easier not
394 to handle the error case (which only happens with rmmod --wait). */
395static inline void __module_get(struct module *module)
396{
397 if (module) {
398 BUG_ON(module_refcount(module) == 0);
399 local_inc(&module->ref[get_cpu()].count);
400 put_cpu();
401 }
402}
403
404static inline int try_module_get(struct module *module)
405{
406 int ret = 1;
407
408 if (module) {
409 unsigned int cpu = get_cpu();
410 if (likely(module_is_live(module)))
411 local_inc(&module->ref[cpu].count);
412 else
413 ret = 0;
414 put_cpu();
415 }
416 return ret;
417}
418
Al Virof6a57032006-10-18 01:47:25 -0400419extern void module_put(struct module *module);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
421#else /*!CONFIG_MODULE_UNLOAD*/
422static inline int try_module_get(struct module *module)
423{
424 return !module || module_is_live(module);
425}
426static inline void module_put(struct module *module)
427{
428}
429static inline void __module_get(struct module *module)
430{
431}
432#define symbol_put(x) do { } while(0)
433#define symbol_put_addr(p) do { } while(0)
434
435#endif /* CONFIG_MODULE_UNLOAD */
436
437/* This is a #define so the string doesn't get put in every .o file */
438#define module_name(mod) \
439({ \
440 struct module *__mod = (mod); \
441 __mod ? __mod->name : "kernel"; \
442})
443
444#define __unsafe(mod) \
445do { \
446 if (mod && !(mod)->unsafe) { \
447 printk(KERN_WARNING \
448 "Module %s cannot be unloaded due to unsafe usage in" \
449 " %s:%u\n", (mod)->name, __FILE__, __LINE__); \
450 (mod)->unsafe = 1; \
451 } \
452} while(0)
453
454/* For kallsyms to ask for address resolution. NULL means not found. */
455const char *module_address_lookup(unsigned long addr,
456 unsigned long *symbolsize,
457 unsigned long *offset,
458 char **modname);
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700459int lookup_module_symbol_name(unsigned long addr, char *symname);
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700460int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
462/* For extable.c to search modules' exception tables. */
463const struct exception_table_entry *search_module_extables(unsigned long addr);
464
465int register_module_notifier(struct notifier_block * nb);
466int unregister_module_notifier(struct notifier_block * nb);
467
468extern void print_modules(void);
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470#else /* !CONFIG_MODULES... */
471#define EXPORT_SYMBOL(sym)
472#define EXPORT_SYMBOL_GPL(sym)
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800473#define EXPORT_SYMBOL_GPL_FUTURE(sym)
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700474#define EXPORT_UNUSED_SYMBOL(sym)
475#define EXPORT_UNUSED_SYMBOL_GPL(sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477/* Given an address, look for it in the exception tables. */
478static inline const struct exception_table_entry *
479search_module_extables(unsigned long addr)
480{
481 return NULL;
482}
483
484/* Is this address in a module? */
485static inline struct module *module_text_address(unsigned long addr)
486{
487 return NULL;
488}
489
490/* Is this address in a module? (don't take a lock, we're oopsing) */
491static inline struct module *__module_text_address(unsigned long addr)
492{
493 return NULL;
494}
495
Ingo Molnar4d435f92006-07-03 00:24:24 -0700496static inline int is_module_address(unsigned long addr)
497{
498 return 0;
499}
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501/* Get/put a kernel symbol (calls should be symmetric) */
502#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
503#define symbol_put(x) do { } while(0)
504#define symbol_put_addr(x) do { } while(0)
505
506static inline void __module_get(struct module *module)
507{
508}
509
510static inline int try_module_get(struct module *module)
511{
512 return 1;
513}
514
515static inline void module_put(struct module *module)
516{
517}
518
519#define module_name(mod) "kernel"
520
521#define __unsafe(mod)
522
523/* For kallsyms to ask for address resolution. NULL means not found. */
524static inline const char *module_address_lookup(unsigned long addr,
525 unsigned long *symbolsize,
526 unsigned long *offset,
527 char **modname)
528{
529 return NULL;
530}
531
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700532static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
533{
534 return -ERANGE;
535}
536
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700537static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
538{
539 return -ERANGE;
540}
541
Alexey Dobriyanea078902007-05-08 00:28:39 -0700542static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
543 char *type, char *name,
544 char *module_name, int *exported)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Alexey Dobriyanea078902007-05-08 00:28:39 -0700546 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547}
548
549static inline unsigned long module_kallsyms_lookup_name(const char *name)
550{
551 return 0;
552}
553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554static inline int register_module_notifier(struct notifier_block * nb)
555{
556 /* no events will happen anyway, so this can always succeed */
557 return 0;
558}
559
560static inline int unregister_module_notifier(struct notifier_block * nb)
561{
562 return 0;
563}
564
565#define module_put_and_exit(code) do_exit(code)
566
567static inline void print_modules(void)
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 */