Line data Source code
1 : #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 : */
9 : #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 <linux/tracepoint.h>
19 :
20 : #include <asm/local.h>
21 : #include <asm/module.h>
22 :
23 : #include <trace/events/module.h>
24 :
25 : /* Not Yet Implemented */
26 : #define MODULE_SUPPORTED_DEVICE(name)
27 :
28 : /* Some toolchains use a `_' prefix for all user symbols. */
29 : #ifdef CONFIG_SYMBOL_PREFIX
30 : #define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
31 : #else
32 : #define MODULE_SYMBOL_PREFIX ""
33 : #endif
34 :
35 : #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
36 :
37 : struct kernel_symbol
38 : {
39 : unsigned long value;
40 : const char *name;
41 : };
42 :
43 : struct modversion_info
44 : {
45 : unsigned long crc;
46 : char name[MODULE_NAME_LEN];
47 : };
48 :
49 : struct module;
50 :
51 : struct module_attribute {
52 : struct attribute attr;
53 : ssize_t (*show)(struct module_attribute *, struct module *, char *);
54 : ssize_t (*store)(struct module_attribute *, struct module *,
55 : const char *, size_t count);
56 : void (*setup)(struct module *, const char *);
57 : int (*test)(struct module *);
58 : void (*free)(struct module *);
59 : };
60 :
61 : struct module_kobject
62 : {
63 : struct kobject kobj;
64 : struct module *mod;
65 : struct kobject *drivers_dir;
66 : struct module_param_attrs *mp;
67 : };
68 :
69 : /* These are either module local, or the kernel's dummy ones. */
70 : extern int init_module(void);
71 : extern void cleanup_module(void);
72 :
73 : /* Archs provide a method of finding the correct exception table. */
74 : struct exception_table_entry;
75 :
76 : const struct exception_table_entry *
77 : search_extable(const struct exception_table_entry *first,
78 : const struct exception_table_entry *last,
79 : unsigned long value);
80 : void sort_extable(struct exception_table_entry *start,
81 : struct exception_table_entry *finish);
82 : void sort_main_extable(void);
83 : void trim_init_extable(struct module *m);
84 :
85 : #ifdef MODULE
86 : #define MODULE_GENERIC_TABLE(gtype,name) \
87 : extern const struct gtype##_id __mod_##gtype##_table \
88 : __attribute__ ((unused, alias(__stringify(name))))
89 :
90 : extern struct module __this_module;
91 : #define THIS_MODULE (&__this_module)
92 : #else /* !MODULE */
93 : #define MODULE_GENERIC_TABLE(gtype,name)
94 : #define THIS_MODULE ((struct module *)0)
95 : #endif
96 :
97 : /* Generic info of form tag = "info" */
98 : #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
99 :
100 : /* For userspace: you can also call me... */
101 : #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
102 :
103 : /*
104 : * The following license idents are currently accepted as indicating free
105 : * software modules
106 : *
107 : * "GPL" [GNU Public License v2 or later]
108 : * "GPL v2" [GNU Public License v2]
109 : * "GPL and additional rights" [GNU Public License v2 rights and more]
110 : * "Dual BSD/GPL" [GNU Public License v2
111 : * or BSD license choice]
112 : * "Dual MIT/GPL" [GNU Public License v2
113 : * or MIT license choice]
114 : * "Dual MPL/GPL" [GNU Public License v2
115 : * or Mozilla license choice]
116 : *
117 : * The following other idents are available
118 : *
119 : * "Proprietary" [Non free products]
120 : *
121 : * There are dual licensed components, but when running with Linux it is the
122 : * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
123 : * is a GPL combined work.
124 : *
125 : * This exists for several reasons
126 : * 1. So modinfo can show license info for users wanting to vet their setup
127 : * is free
128 : * 2. So the community can ignore bug reports including proprietary modules
129 : * 3. So vendors can do likewise based on their own policies
130 : */
131 : #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
132 :
133 : /*
134 : * Author(s), use "Name <email>" or just "Name", for multiple
135 : * authors use multiple MODULE_AUTHOR() statements/lines.
136 : */
137 : #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
138 :
139 : /* What your module does. */
140 : #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
141 :
142 : /* One for each parameter, describing how to use it. Some files do
143 : multiple of these per line, so can't just use MODULE_INFO. */
144 : #define MODULE_PARM_DESC(_parm, desc) \
145 : __MODULE_INFO(parm, _parm, #_parm ":" desc)
146 :
147 : #define MODULE_DEVICE_TABLE(type,name) \
148 : MODULE_GENERIC_TABLE(type##_device,name)
149 :
150 : /* Version of form [<epoch>:]<version>[-<extra-version>].
151 : Or for CVS/RCS ID version, everything but the number is stripped.
152 : <epoch>: A (small) unsigned integer which allows you to start versions
153 : anew. If not mentioned, it's zero. eg. "2:1.0" is after
154 : "1:2.0".
155 : <version>: The <version> may contain only alphanumerics and the
156 : character `.'. Ordered by numeric sort for numeric parts,
157 : ascii sort for ascii parts (as per RPM or DEB algorithm).
158 : <extraversion>: Like <version>, but inserted for local
159 : customizations, eg "rh3" or "rusty1".
160 :
161 : Using this automatically adds a checksum of the .c files and the
162 : local headers in "srcversion".
163 : */
164 : #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
165 :
166 : /* Optional firmware file (or files) needed by the module
167 : * format is simply firmware file name. Multiple firmware
168 : * files require multiple MODULE_FIRMWARE() specifiers */
169 : #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
170 :
171 : /* Given an address, look for it in the exception tables */
172 : const struct exception_table_entry *search_exception_tables(unsigned long add);
173 :
174 : struct notifier_block;
175 :
176 : #ifdef CONFIG_MODULES
177 :
178 : /* Get/put a kernel symbol (calls must be symmetric) */
179 : void *__symbol_get(const char *symbol);
180 : void *__symbol_get_gpl(const char *symbol);
181 : #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
182 :
183 : #ifndef __GENKSYMS__
184 : #ifdef CONFIG_MODVERSIONS
185 : /* Mark the CRC weak since genksyms apparently decides not to
186 : * generate a checksums for some symbols */
187 : #define __CRC_SYMBOL(sym, sec) \
188 : extern void *__crc_##sym __attribute__((weak)); \
189 : static const unsigned long __kcrctab_##sym \
190 : __used \
191 : __attribute__((section("__kcrctab" sec), unused)) \
192 : = (unsigned long) &__crc_##sym;
193 : #else
194 : #define __CRC_SYMBOL(sym, sec)
195 : #endif
196 :
197 : /* For every exported symbol, place a struct in the __ksymtab section */
198 : #define __EXPORT_SYMBOL(sym, sec) \
199 : extern typeof(sym) sym; \
200 : __CRC_SYMBOL(sym, sec) \
201 : static const char __kstrtab_##sym[] \
202 : __attribute__((section("__ksymtab_strings"), aligned(1))) \
203 : = MODULE_SYMBOL_PREFIX #sym; \
204 : static const struct kernel_symbol __ksymtab_##sym \
205 : __used \
206 : __attribute__((section("__ksymtab" sec), unused)) \
207 : = { (unsigned long)&sym, __kstrtab_##sym }
208 :
209 : #define EXPORT_SYMBOL(sym) \
210 : __EXPORT_SYMBOL(sym, "")
211 :
212 : #define EXPORT_SYMBOL_GPL(sym) \
213 : __EXPORT_SYMBOL(sym, "_gpl")
214 :
215 : #define EXPORT_SYMBOL_GPL_FUTURE(sym) \
216 : __EXPORT_SYMBOL(sym, "_gpl_future")
217 :
218 :
219 : #ifdef CONFIG_UNUSED_SYMBOLS
220 : #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
221 : #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
222 : #else
223 : #define EXPORT_UNUSED_SYMBOL(sym)
224 : #define EXPORT_UNUSED_SYMBOL_GPL(sym)
225 : #endif
226 :
227 : #endif
228 :
229 : enum module_state
230 : {
231 : MODULE_STATE_LIVE,
232 : MODULE_STATE_COMING,
233 : MODULE_STATE_GOING,
234 : };
235 :
236 : struct module
237 : {
238 : enum module_state state;
239 :
240 : /* Member of list of modules */
241 : struct list_head list;
242 :
243 : /* Unique handle for this module */
244 : char name[MODULE_NAME_LEN];
245 :
246 : /* Sysfs stuff. */
247 : struct module_kobject mkobj;
248 : struct module_attribute *modinfo_attrs;
249 : const char *version;
250 : const char *srcversion;
251 : struct kobject *holders_dir;
252 :
253 : /* Exported symbols */
254 : const struct kernel_symbol *syms;
255 : const unsigned long *crcs;
256 : unsigned int num_syms;
257 :
258 : /* Kernel parameters. */
259 : struct kernel_param *kp;
260 : unsigned int num_kp;
261 :
262 : /* GPL-only exported symbols. */
263 : unsigned int num_gpl_syms;
264 : const struct kernel_symbol *gpl_syms;
265 : const unsigned long *gpl_crcs;
266 :
267 : #ifdef CONFIG_UNUSED_SYMBOLS
268 : /* unused exported symbols. */
269 : const struct kernel_symbol *unused_syms;
270 : const unsigned long *unused_crcs;
271 : unsigned int num_unused_syms;
272 :
273 : /* GPL-only, unused exported symbols. */
274 : unsigned int num_unused_gpl_syms;
275 : const struct kernel_symbol *unused_gpl_syms;
276 : const unsigned long *unused_gpl_crcs;
277 : #endif
278 :
279 : /* symbols that will be GPL-only in the near future. */
280 : const struct kernel_symbol *gpl_future_syms;
281 : const unsigned long *gpl_future_crcs;
282 : unsigned int num_gpl_future_syms;
283 :
284 : /* Exception table */
285 : unsigned int num_exentries;
286 : struct exception_table_entry *extable;
287 :
288 : /* Startup function. */
289 : int (*init)(void);
290 :
291 : /* If this is non-NULL, vfree after init() returns */
292 : void *module_init;
293 :
294 : /* Here is the actual code + data, vfree'd on unload. */
295 : void *module_core;
296 :
297 : /* Here are the sizes of the init and core sections */
298 : unsigned int init_size, core_size;
299 :
300 : /* The size of the executable code in each section. */
301 : unsigned int init_text_size, core_text_size;
302 :
303 : /* Arch-specific module values */
304 : struct mod_arch_specific arch;
305 :
306 : unsigned int taints; /* same bits as kernel:tainted */
307 :
308 : #ifdef CONFIG_GENERIC_BUG
309 : /* Support for BUG */
310 : unsigned num_bugs;
311 : struct list_head bug_list;
312 : struct bug_entry *bug_table;
313 : #endif
314 :
315 : #ifdef CONFIG_KALLSYMS
316 : /*
317 : * We keep the symbol and string tables for kallsyms.
318 : * The core_* fields below are temporary, loader-only (they
319 : * could really be discarded after module init).
320 : */
321 : Elf_Sym *symtab, *core_symtab;
322 : unsigned int num_symtab, core_num_syms;
323 : char *strtab, *core_strtab;
324 :
325 : /* Section attributes */
326 : struct module_sect_attrs *sect_attrs;
327 :
328 : /* Notes attributes */
329 : struct module_notes_attrs *notes_attrs;
330 : #endif
331 :
332 : /* Per-cpu data. */
333 : void *percpu;
334 :
335 : /* The command line arguments (may be mangled). People like
336 : keeping pointers to this stuff */
337 : char *args;
338 : #ifdef CONFIG_TRACEPOINTS
339 : struct tracepoint *tracepoints;
340 : unsigned int num_tracepoints;
341 : #endif
342 :
343 : #ifdef CONFIG_TRACING
344 : const char **trace_bprintk_fmt_start;
345 : unsigned int num_trace_bprintk_fmt;
346 : #endif
347 : #ifdef CONFIG_EVENT_TRACING
348 : struct ftrace_event_call *trace_events;
349 : unsigned int num_trace_events;
350 : #endif
351 : #ifdef CONFIG_FTRACE_MCOUNT_RECORD
352 : unsigned long *ftrace_callsites;
353 : unsigned int num_ftrace_callsites;
354 : #endif
355 :
356 : #ifdef CONFIG_MODULE_UNLOAD
357 : /* What modules depend on me? */
358 : struct list_head modules_which_use_me;
359 :
360 : /* Who is waiting for us to be unloaded */
361 : struct task_struct *waiter;
362 :
363 : /* Destruction function. */
364 : void (*exit)(void);
365 :
366 : #ifdef CONFIG_SMP
367 : char *refptr;
368 : #else
369 : local_t ref;
370 : #endif
371 : #endif
372 :
373 : #ifdef CONFIG_CONSTRUCTORS
374 : /* Constructor functions. */
375 : ctor_fn_t *ctors;
376 : unsigned int num_ctors;
377 : #endif
378 : };
379 : #ifndef MODULE_ARCH_INIT
380 : #define MODULE_ARCH_INIT {}
381 : #endif
382 :
383 : extern struct mutex module_mutex;
384 :
385 : /* FIXME: It'd be nice to isolate modules during init, too, so they
386 : aren't used before they (may) fail. But presently too much code
387 : (IDE & SCSI) require entry into the module during init.*/
388 : static inline int module_is_live(struct module *mod)
389 : {
390 : return mod->state != MODULE_STATE_GOING;
391 : }
392 :
393 : struct module *__module_text_address(unsigned long addr);
394 : struct module *__module_address(unsigned long addr);
395 : bool is_module_address(unsigned long addr);
396 : bool is_module_text_address(unsigned long addr);
397 :
398 : static inline int within_module_core(unsigned long addr, struct module *mod)
399 : {
400 : return (unsigned long)mod->module_core <= addr &&
401 : addr < (unsigned long)mod->module_core + mod->core_size;
402 : }
403 :
404 : static inline int within_module_init(unsigned long addr, struct module *mod)
405 : {
406 : return (unsigned long)mod->module_init <= addr &&
407 : addr < (unsigned long)mod->module_init + mod->init_size;
408 : }
409 :
410 : /* Search for module by name: must hold module_mutex. */
411 : struct module *find_module(const char *name);
412 :
413 : struct symsearch {
414 : const struct kernel_symbol *start, *stop;
415 : const unsigned long *crcs;
416 : enum {
417 : NOT_GPL_ONLY,
418 : GPL_ONLY,
419 : WILL_BE_GPL_ONLY,
420 : } licence;
421 : bool unused;
422 : };
423 :
424 : /* Search for an exported symbol by name. */
425 : const struct kernel_symbol *find_symbol(const char *name,
426 : struct module **owner,
427 : const unsigned long **crc,
428 : bool gplok,
429 : bool warn);
430 :
431 : /* Walk the exported symbol table */
432 : bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
433 : unsigned int symnum, void *data), void *data);
434 :
435 : /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
436 : symnum out of range. */
437 : int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
438 : char *name, char *module_name, int *exported);
439 :
440 : /* Look for this name: can be of form module:name. */
441 : unsigned long module_kallsyms_lookup_name(const char *name);
442 :
443 : int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
444 : struct module *, unsigned long),
445 : void *data);
446 :
447 : extern void __module_put_and_exit(struct module *mod, long code)
448 : __attribute__((noreturn));
449 : #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
450 :
451 : #ifdef CONFIG_MODULE_UNLOAD
452 : unsigned int module_refcount(struct module *mod);
453 : void __symbol_put(const char *symbol);
454 : #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
455 : void symbol_put_addr(void *addr);
456 :
457 : static inline local_t *__module_ref_addr(struct module *mod, int cpu)
458 : {
459 : #ifdef CONFIG_SMP
460 : return (local_t *) per_cpu_ptr(mod->refptr, cpu);
461 : #else
462 : return &mod->ref;
463 : #endif
464 : }
465 :
466 : /* Sometimes we know we already have a refcount, and it's easier not
467 : to handle the error case (which only happens with rmmod --wait). */
468 : static inline void __module_get(struct module *module)
469 : {
470 : if (module) {
471 : unsigned int cpu = get_cpu();
472 : local_inc(__module_ref_addr(module, cpu));
473 : trace_module_get(module, _THIS_IP_,
474 : local_read(__module_ref_addr(module, cpu)));
475 : put_cpu();
476 : }
477 : }
478 :
479 : static inline int try_module_get(struct module *module)
480 : {
481 : int ret = 1;
482 :
483 : if (module) {
484 : unsigned int cpu = get_cpu();
485 : if (likely(module_is_live(module))) {
486 : local_inc(__module_ref_addr(module, cpu));
487 : trace_module_get(module, _THIS_IP_,
488 : local_read(__module_ref_addr(module, cpu)));
489 : }
490 : else
491 : ret = 0;
492 : put_cpu();
493 : }
494 : return ret;
495 : }
496 :
497 : extern void module_put(struct module *module);
498 :
499 : #else /*!CONFIG_MODULE_UNLOAD*/
500 : static inline int try_module_get(struct module *module)
501 : {
502 : return !module || module_is_live(module);
503 : }
504 : static inline void module_put(struct module *module)
505 : {
506 : }
507 : static inline void __module_get(struct module *module)
508 : {
509 : }
510 : #define symbol_put(x) do { } while(0)
511 : #define symbol_put_addr(p) do { } while(0)
512 :
513 : #endif /* CONFIG_MODULE_UNLOAD */
514 : int use_module(struct module *a, struct module *b);
515 :
516 : /* This is a #define so the string doesn't get put in every .o file */
517 : #define module_name(mod) \
518 : ({ \
519 : struct module *__mod = (mod); \
520 : __mod ? __mod->name : "kernel"; \
521 : })
522 :
523 : /* For kallsyms to ask for address resolution. namebuf should be at
524 : * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
525 : * found, otherwise NULL. */
526 : const char *module_address_lookup(unsigned long addr,
527 : unsigned long *symbolsize,
528 : unsigned long *offset,
529 : char **modname,
530 : char *namebuf);
531 : int lookup_module_symbol_name(unsigned long addr, char *symname);
532 : int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
533 :
534 : /* For extable.c to search modules' exception tables. */
535 : const struct exception_table_entry *search_module_extables(unsigned long addr);
536 :
537 : int register_module_notifier(struct notifier_block * nb);
538 : int unregister_module_notifier(struct notifier_block * nb);
539 :
540 : extern void print_modules(void);
541 :
542 : extern void module_update_tracepoints(void);
543 : extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
544 :
545 : #else /* !CONFIG_MODULES... */
546 : #define EXPORT_SYMBOL(sym)
547 : #define EXPORT_SYMBOL_GPL(sym)
548 : #define EXPORT_SYMBOL_GPL_FUTURE(sym)
549 : #define EXPORT_UNUSED_SYMBOL(sym)
550 : #define EXPORT_UNUSED_SYMBOL_GPL(sym)
551 :
552 : /* Given an address, look for it in the exception tables. */
553 : static inline const struct exception_table_entry *
554 : search_module_extables(unsigned long addr)
555 : {
556 : return NULL;
557 : }
558 :
559 : static inline struct module *__module_address(unsigned long addr)
560 : {
561 : return NULL;
562 : }
563 :
564 : static inline struct module *__module_text_address(unsigned long addr)
565 : {
566 : return NULL;
567 : }
568 :
569 : static inline bool is_module_address(unsigned long addr)
570 : {
571 : return false;
572 : }
573 :
574 : static inline bool is_module_text_address(unsigned long addr)
575 : {
576 : return false;
577 : }
578 :
579 : /* Get/put a kernel symbol (calls should be symmetric) */
580 : #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
581 : #define symbol_put(x) do { } while(0)
582 : #define symbol_put_addr(x) do { } while(0)
583 :
584 : static inline void __module_get(struct module *module)
585 : {
586 9 : }
587 :
588 : static inline int try_module_get(struct module *module)
589 : {
590 4 : return 1;
591 : }
592 :
593 : static inline void module_put(struct module *module)
594 : {
595 : }
596 :
597 : #define module_name(mod) "kernel"
598 :
599 : /* For kallsyms to ask for address resolution. NULL means not found. */
600 : static inline const char *module_address_lookup(unsigned long addr,
601 : unsigned long *symbolsize,
602 : unsigned long *offset,
603 : char **modname,
604 : char *namebuf)
605 : {
606 : return NULL;
607 : }
608 :
609 : static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
610 : {
611 : return -ERANGE;
612 : }
613 :
614 : static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
615 : {
616 : return -ERANGE;
617 : }
618 :
619 : static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
620 : char *type, char *name,
621 : char *module_name, int *exported)
622 : {
623 : return -ERANGE;
624 : }
625 :
626 : static inline unsigned long module_kallsyms_lookup_name(const char *name)
627 : {
628 : return 0;
629 : }
630 :
631 : static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
632 : struct module *,
633 : unsigned long),
634 : void *data)
635 : {
636 : return 0;
637 : }
638 :
639 : static inline int register_module_notifier(struct notifier_block * nb)
640 : {
641 : /* no events will happen anyway, so this can always succeed */
642 : return 0;
643 : }
644 :
645 : static inline int unregister_module_notifier(struct notifier_block * nb)
646 : {
647 : return 0;
648 : }
649 :
650 : #define module_put_and_exit(code) do_exit(code)
651 :
652 : static inline void print_modules(void)
653 : {
654 : }
655 :
656 : static inline void module_update_tracepoints(void)
657 : {
658 : }
659 :
660 : static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
661 : {
662 : return 0;
663 : }
664 1 :
665 : #endif /* CONFIG_MODULES */
666 :
667 : struct device_driver;
668 : #ifdef CONFIG_SYSFS
669 : struct module;
670 :
671 : extern struct kset *module_kset;
672 : extern struct kobj_type module_ktype;
673 : extern int module_sysfs_initialized;
674 :
675 : int mod_sysfs_init(struct module *mod);
676 : int mod_sysfs_setup(struct module *mod,
677 : struct kernel_param *kparam,
678 : unsigned int num_params);
679 : int module_add_modinfo_attrs(struct module *mod);
680 : void module_remove_modinfo_attrs(struct module *mod);
681 :
682 : #else /* !CONFIG_SYSFS */
683 :
684 : static inline int mod_sysfs_init(struct module *mod)
685 : {
686 : return 0;
687 : }
688 :
689 : static inline int mod_sysfs_setup(struct module *mod,
690 : struct kernel_param *kparam,
691 : unsigned int num_params)
692 : {
693 : return 0;
694 : }
695 :
696 : static inline int module_add_modinfo_attrs(struct module *mod)
697 : {
698 : return 0;
699 : }
700 :
701 : static inline void module_remove_modinfo_attrs(struct module *mod)
702 : { }
703 :
704 : #endif /* CONFIG_SYSFS */
705 :
706 : #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
707 :
708 : /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
709 :
710 : #define __MODULE_STRING(x) __stringify(x)
711 :
712 :
713 : #ifdef CONFIG_GENERIC_BUG
714 : int module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
715 : struct module *);
716 : void module_bug_cleanup(struct module *);
717 :
718 : #else /* !CONFIG_GENERIC_BUG */
719 :
720 : static inline int module_bug_finalize(const Elf_Ehdr *hdr,
721 : const Elf_Shdr *sechdrs,
722 : struct module *mod)
723 : {
724 : return 0;
725 : }
726 : static inline void module_bug_cleanup(struct module *mod) {}
727 : #endif /* CONFIG_GENERIC_BUG */
728 :
729 : #endif /* _LINUX_MODULE_H */
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