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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/spinlock.h>
10#include <linux/list.h>
11#include <linux/stat.h>
12#include <linux/compiler.h>
13#include <linux/cache.h>
14#include <linux/kmod.h>
15#include <linux/elf.h>
16#include <linux/stringify.h>
17#include <linux/kobject.h>
18#include <linux/moduleparam.h>
19#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-Hartman03e88ae12006-02-16 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
316 /* Am I unsafe to unload? */
317 int unsafe;
318
Randy Dunlap2bc2d612006-10-02 02:17:02 -0700319 unsigned int taints; /* same bits as kernel:tainted */
320
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800321#ifdef CONFIG_GENERIC_BUG
322 /* Support for BUG */
323 struct list_head bug_list;
324 struct bug_entry *bug_table;
325 unsigned num_bugs;
326#endif
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328#ifdef CONFIG_MODULE_UNLOAD
329 /* Reference counts */
330 struct module_ref ref[NR_CPUS];
331
332 /* What modules depend on me? */
333 struct list_head modules_which_use_me;
334
335 /* Who is waiting for us to be unloaded */
336 struct task_struct *waiter;
337
338 /* Destruction function. */
339 void (*exit)(void);
340#endif
341
342#ifdef CONFIG_KALLSYMS
343 /* We keep the symbol and string tables for kallsyms. */
344 Elf_Sym *symtab;
345 unsigned long num_symtab;
346 char *strtab;
347
348 /* Section attributes */
349 struct module_sect_attrs *sect_attrs;
350#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;
358};
Roman Zippele61a1c12007-05-09 02:35:15 -0700359#ifndef MODULE_ARCH_INIT
360#define MODULE_ARCH_INIT {}
361#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363/* FIXME: It'd be nice to isolate modules during init, too, so they
364 aren't used before they (may) fail. But presently too much code
365 (IDE & SCSI) require entry into the module during init.*/
366static inline int module_is_live(struct module *mod)
367{
368 return mod->state != MODULE_STATE_GOING;
369}
370
371/* Is this address in a module? (second is with no locks, for oops) */
372struct module *module_text_address(unsigned long addr);
373struct module *__module_text_address(unsigned long addr);
Ingo Molnar4d435f92006-07-03 00:24:24 -0700374int is_module_address(unsigned long addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Alexey Dobriyanea078902007-05-08 00:28:39 -0700376/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 symnum out of range. */
Alexey Dobriyanea078902007-05-08 00:28:39 -0700378int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
379 char *name, char *module_name, int *exported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381/* Look for this name: can be of form module:name. */
382unsigned long module_kallsyms_lookup_name(const char *name);
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384extern void __module_put_and_exit(struct module *mod, long code)
385 __attribute__((noreturn));
386#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
387
388#ifdef CONFIG_MODULE_UNLOAD
389unsigned int module_refcount(struct module *mod);
390void __symbol_put(const char *symbol);
391#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
392void symbol_put_addr(void *addr);
393
394/* Sometimes we know we already have a refcount, and it's easier not
395 to handle the error case (which only happens with rmmod --wait). */
396static inline void __module_get(struct module *module)
397{
398 if (module) {
399 BUG_ON(module_refcount(module) == 0);
400 local_inc(&module->ref[get_cpu()].count);
401 put_cpu();
402 }
403}
404
405static inline int try_module_get(struct module *module)
406{
407 int ret = 1;
408
409 if (module) {
410 unsigned int cpu = get_cpu();
411 if (likely(module_is_live(module)))
412 local_inc(&module->ref[cpu].count);
413 else
414 ret = 0;
415 put_cpu();
416 }
417 return ret;
418}
419
Al Virof6a57032006-10-18 01:47:25 -0400420extern void module_put(struct module *module);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422#else /*!CONFIG_MODULE_UNLOAD*/
423static inline int try_module_get(struct module *module)
424{
425 return !module || module_is_live(module);
426}
427static inline void module_put(struct module *module)
428{
429}
430static inline void __module_get(struct module *module)
431{
432}
433#define symbol_put(x) do { } while(0)
434#define symbol_put_addr(p) do { } while(0)
435
436#endif /* CONFIG_MODULE_UNLOAD */
437
438/* This is a #define so the string doesn't get put in every .o file */
439#define module_name(mod) \
440({ \
441 struct module *__mod = (mod); \
442 __mod ? __mod->name : "kernel"; \
443})
444
445#define __unsafe(mod) \
446do { \
447 if (mod && !(mod)->unsafe) { \
448 printk(KERN_WARNING \
449 "Module %s cannot be unloaded due to unsafe usage in" \
450 " %s:%u\n", (mod)->name, __FILE__, __LINE__); \
451 (mod)->unsafe = 1; \
452 } \
453} while(0)
454
455/* For kallsyms to ask for address resolution. NULL means not found. */
456const char *module_address_lookup(unsigned long addr,
457 unsigned long *symbolsize,
458 unsigned long *offset,
459 char **modname);
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700460int lookup_module_symbol_name(unsigned long addr, char *symname);
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700461int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463/* For extable.c to search modules' exception tables. */
464const struct exception_table_entry *search_module_extables(unsigned long addr);
465
466int register_module_notifier(struct notifier_block * nb);
467int unregister_module_notifier(struct notifier_block * nb);
468
469extern void print_modules(void);
470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471#else /* !CONFIG_MODULES... */
472#define EXPORT_SYMBOL(sym)
473#define EXPORT_SYMBOL_GPL(sym)
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800474#define EXPORT_SYMBOL_GPL_FUTURE(sym)
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700475#define EXPORT_UNUSED_SYMBOL(sym)
476#define EXPORT_UNUSED_SYMBOL_GPL(sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478/* Given an address, look for it in the exception tables. */
479static inline const struct exception_table_entry *
480search_module_extables(unsigned long addr)
481{
482 return NULL;
483}
484
485/* Is this address in a module? */
486static inline struct module *module_text_address(unsigned long addr)
487{
488 return NULL;
489}
490
491/* Is this address in a module? (don't take a lock, we're oopsing) */
492static inline struct module *__module_text_address(unsigned long addr)
493{
494 return NULL;
495}
496
Ingo Molnar4d435f92006-07-03 00:24:24 -0700497static inline int is_module_address(unsigned long addr)
498{
499 return 0;
500}
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502/* Get/put a kernel symbol (calls should be symmetric) */
503#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
504#define symbol_put(x) do { } while(0)
505#define symbol_put_addr(x) do { } while(0)
506
507static inline void __module_get(struct module *module)
508{
509}
510
511static inline int try_module_get(struct module *module)
512{
513 return 1;
514}
515
516static inline void module_put(struct module *module)
517{
518}
519
520#define module_name(mod) "kernel"
521
522#define __unsafe(mod)
523
524/* For kallsyms to ask for address resolution. NULL means not found. */
525static inline const char *module_address_lookup(unsigned long addr,
526 unsigned long *symbolsize,
527 unsigned long *offset,
528 char **modname)
529{
530 return NULL;
531}
532
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700533static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
534{
535 return -ERANGE;
536}
537
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700538static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
539{
540 return -ERANGE;
541}
542
Alexey Dobriyanea078902007-05-08 00:28:39 -0700543static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
544 char *type, char *name,
545 char *module_name, int *exported)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546{
Alexey Dobriyanea078902007-05-08 00:28:39 -0700547 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548}
549
550static inline unsigned long module_kallsyms_lookup_name(const char *name)
551{
552 return 0;
553}
554
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555static inline int register_module_notifier(struct notifier_block * nb)
556{
557 /* no events will happen anyway, so this can always succeed */
558 return 0;
559}
560
561static inline int unregister_module_notifier(struct notifier_block * nb)
562{
563 return 0;
564}
565
566#define module_put_and_exit(code) do_exit(code)
567
568static inline void print_modules(void)
569{
570}
571
Randy Dunlapef665c12007-02-13 15:19:06 -0800572#endif /* CONFIG_MODULES */
573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574struct device_driver;
Randy Dunlapef665c12007-02-13 15:19:06 -0800575#ifdef CONFIG_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576struct module;
577
Greg Kroah-Hartman823bccf2007-04-13 13:15:19 -0700578extern struct kset module_subsys;
Randy Dunlapef665c12007-02-13 15:19:06 -0800579
580int mod_sysfs_init(struct module *mod);
581int mod_sysfs_setup(struct module *mod,
582 struct kernel_param *kparam,
583 unsigned int num_params);
584int module_add_modinfo_attrs(struct module *mod);
585void module_remove_modinfo_attrs(struct module *mod);
586
587#else /* !CONFIG_SYSFS */
588
589static inline int mod_sysfs_init(struct module *mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Randy Dunlapef665c12007-02-13 15:19:06 -0800591 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592}
593
Randy Dunlapef665c12007-02-13 15:19:06 -0800594static inline int mod_sysfs_setup(struct module *mod,
595 struct kernel_param *kparam,
596 unsigned int num_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597{
Randy Dunlapef665c12007-02-13 15:19:06 -0800598 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599}
600
Randy Dunlapef665c12007-02-13 15:19:06 -0800601static inline int module_add_modinfo_attrs(struct module *mod)
602{
603 return 0;
604}
605
606static inline void module_remove_modinfo_attrs(struct module *mod)
607{ }
608
609#endif /* CONFIG_SYSFS */
610
611#if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
612
613void module_add_driver(struct module *mod, struct device_driver *drv);
614void module_remove_driver(struct device_driver *drv);
615
616#else /* not both CONFIG_SYSFS && CONFIG_MODULES */
617
618static inline void module_add_driver(struct module *mod, struct device_driver *drv)
619{ }
620
621static inline void module_remove_driver(struct device_driver *drv)
622{ }
623
624#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
627
628/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630#define __MODULE_STRING(x) __stringify(x)
631
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632#endif /* _LINUX_MODULE_H */