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/init.h>
15 #include <linux/elf.h>
16 #include <linux/stringify.h>
17 #include <linux/kobject.h>
18 #include <linux/moduleparam.h>
19 #include <linux/jump_label.h>
20 #include <linux/export.h>
21 #include <linux/rbtree_latch.h>
22
23 #include <linux/percpu.h>
24 #include <asm/module.h>
25
26 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
27 #define MODULE_SIG_STRING "~Module signature appended~\n"
28
29 /* Not Yet Implemented */
30 #define MODULE_SUPPORTED_DEVICE(name)
31
32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
33
34 struct modversion_info {
35 unsigned long crc;
36 char name[MODULE_NAME_LEN];
37 };
38
39 struct module;
40
41 struct module_kobject {
42 struct kobject kobj;
43 struct module *mod;
44 struct kobject *drivers_dir;
45 struct module_param_attrs *mp;
46 struct completion *kobj_completion;
47 };
48
49 struct module_attribute {
50 struct attribute attr;
51 ssize_t (*show)(struct module_attribute *, struct module_kobject *,
52 char *);
53 ssize_t (*store)(struct module_attribute *, struct module_kobject *,
54 const char *, size_t count);
55 void (*setup)(struct module *, const char *);
56 int (*test)(struct module *);
57 void (*free)(struct module *);
58 };
59
60 struct module_version_attribute {
61 struct module_attribute mattr;
62 const char *module_name;
63 const char *version;
64 } __attribute__ ((__aligned__(sizeof(void *))));
65
66 extern ssize_t __modver_version_show(struct module_attribute *,
67 struct module_kobject *, char *);
68
69 extern struct module_attribute module_uevent;
70
71 /* These are either module local, or the kernel's dummy ones. */
72 extern int init_module(void);
73 extern void cleanup_module(void);
74
75 #ifndef MODULE
76 /**
77 * module_init() - driver initialization entry point
78 * @x: function to be run at kernel boot time or module insertion
79 *
80 * module_init() will either be called during do_initcalls() (if
81 * builtin) or at module insertion time (if a module). There can only
82 * be one per module.
83 */
84 #define module_init(x) __initcall(x);
85
86 /**
87 * module_exit() - driver exit entry point
88 * @x: function to be run when driver is removed
89 *
90 * module_exit() will wrap the driver clean-up code
91 * with cleanup_module() when used with rmmod when
92 * the driver is a module. If the driver is statically
93 * compiled into the kernel, module_exit() has no effect.
94 * There can only be one per module.
95 */
96 #define module_exit(x) __exitcall(x);
97
98 #else /* MODULE */
99
100 /*
101 * In most cases loadable modules do not need custom
102 * initcall levels. There are still some valid cases where
103 * a driver may be needed early if built in, and does not
104 * matter when built as a loadable module. Like bus
105 * snooping debug drivers.
106 */
107 #define early_initcall(fn) module_init(fn)
108 #define core_initcall(fn) module_init(fn)
109 #define core_initcall_sync(fn) module_init(fn)
110 #define postcore_initcall(fn) module_init(fn)
111 #define postcore_initcall_sync(fn) module_init(fn)
112 #define arch_initcall(fn) module_init(fn)
113 #define subsys_initcall(fn) module_init(fn)
114 #define subsys_initcall_sync(fn) module_init(fn)
115 #define fs_initcall(fn) module_init(fn)
116 #define fs_initcall_sync(fn) module_init(fn)
117 #define rootfs_initcall(fn) module_init(fn)
118 #define device_initcall(fn) module_init(fn)
119 #define device_initcall_sync(fn) module_init(fn)
120 #define late_initcall(fn) module_init(fn)
121 #define late_initcall_sync(fn) module_init(fn)
122
123 #define console_initcall(fn) module_init(fn)
124 #define security_initcall(fn) module_init(fn)
125
126 /* Each module must use one module_init(). */
127 #define module_init(initfn) \
128 static inline initcall_t __inittest(void) \
129 { return initfn; } \
130 int init_module(void) __attribute__((alias(#initfn)));
131
132 /* This is only required if you want to be unloadable. */
133 #define module_exit(exitfn) \
134 static inline exitcall_t __exittest(void) \
135 { return exitfn; } \
136 void cleanup_module(void) __attribute__((alias(#exitfn)));
137
138 #endif
139
140 /* This means "can be init if no module support, otherwise module load
141 may call it." */
142 #ifdef CONFIG_MODULES
143 #define __init_or_module
144 #define __initdata_or_module
145 #define __initconst_or_module
146 #define __INIT_OR_MODULE .text
147 #define __INITDATA_OR_MODULE .data
148 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits
149 #else
150 #define __init_or_module __init
151 #define __initdata_or_module __initdata
152 #define __initconst_or_module __initconst
153 #define __INIT_OR_MODULE __INIT
154 #define __INITDATA_OR_MODULE __INITDATA
155 #define __INITRODATA_OR_MODULE __INITRODATA
156 #endif /*CONFIG_MODULES*/
157
158 /* Archs provide a method of finding the correct exception table. */
159 struct exception_table_entry;
160
161 const struct exception_table_entry *
162 search_extable(const struct exception_table_entry *first,
163 const struct exception_table_entry *last,
164 unsigned long value);
165 void sort_extable(struct exception_table_entry *start,
166 struct exception_table_entry *finish);
167 void sort_main_extable(void);
168 void trim_init_extable(struct module *m);
169
170 /* Generic info of form tag = "info" */
171 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
172
173 /* For userspace: you can also call me... */
174 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
175
176 /* Soft module dependencies. See man modprobe.d for details.
177 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
178 */
179 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
180
181 /*
182 * The following license idents are currently accepted as indicating free
183 * software modules
184 *
185 * "GPL" [GNU Public License v2 or later]
186 * "GPL v2" [GNU Public License v2]
187 * "GPL and additional rights" [GNU Public License v2 rights and more]
188 * "Dual BSD/GPL" [GNU Public License v2
189 * or BSD license choice]
190 * "Dual MIT/GPL" [GNU Public License v2
191 * or MIT license choice]
192 * "Dual MPL/GPL" [GNU Public License v2
193 * or Mozilla license choice]
194 *
195 * The following other idents are available
196 *
197 * "Proprietary" [Non free products]
198 *
199 * There are dual licensed components, but when running with Linux it is the
200 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
201 * is a GPL combined work.
202 *
203 * This exists for several reasons
204 * 1. So modinfo can show license info for users wanting to vet their setup
205 * is free
206 * 2. So the community can ignore bug reports including proprietary modules
207 * 3. So vendors can do likewise based on their own policies
208 */
209 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
210
211 /*
212 * Author(s), use "Name <email>" or just "Name", for multiple
213 * authors use multiple MODULE_AUTHOR() statements/lines.
214 */
215 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
216
217 /* What your module does. */
218 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
219
220 #ifdef MODULE
221 /* Creates an alias so file2alias.c can find device table. */
222 #define MODULE_DEVICE_TABLE(type, name) \
223 extern const typeof(name) __mod_##type##__##name##_device_table \
224 __attribute__ ((unused, alias(__stringify(name))))
225 #else /* !MODULE */
226 #define MODULE_DEVICE_TABLE(type, name)
227 #endif
228
229 /* Version of form [<epoch>:]<version>[-<extra-version>].
230 * Or for CVS/RCS ID version, everything but the number is stripped.
231 * <epoch>: A (small) unsigned integer which allows you to start versions
232 * anew. If not mentioned, it's zero. eg. "2:1.0" is after
233 * "1:2.0".
234
235 * <version>: The <version> may contain only alphanumerics and the
236 * character `.'. Ordered by numeric sort for numeric parts,
237 * ascii sort for ascii parts (as per RPM or DEB algorithm).
238
239 * <extraversion>: Like <version>, but inserted for local
240 * customizations, eg "rh3" or "rusty1".
241
242 * Using this automatically adds a checksum of the .c files and the
243 * local headers in "srcversion".
244 */
245
246 #if defined(MODULE) || !defined(CONFIG_SYSFS)
247 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
248 #else
249 #define MODULE_VERSION(_version) \
250 static struct module_version_attribute ___modver_attr = { \
251 .mattr = { \
252 .attr = { \
253 .name = "version", \
254 .mode = S_IRUGO, \
255 }, \
256 .show = __modver_version_show, \
257 }, \
258 .module_name = KBUILD_MODNAME, \
259 .version = _version, \
260 }; \
261 static const struct module_version_attribute \
262 __used __attribute__ ((__section__ ("__modver"))) \
263 * __moduleparam_const __modver_attr = &___modver_attr
264 #endif
265
266 /* Optional firmware file (or files) needed by the module
267 * format is simply firmware file name. Multiple firmware
268 * files require multiple MODULE_FIRMWARE() specifiers */
269 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
270
271 /* Given an address, look for it in the exception tables */
272 const struct exception_table_entry *search_exception_tables(unsigned long add);
273
274 struct notifier_block;
275
276 #ifdef CONFIG_MODULES
277
278 extern int modules_disabled; /* for sysctl */
279 /* Get/put a kernel symbol (calls must be symmetric) */
280 void *__symbol_get(const char *symbol);
281 void *__symbol_get_gpl(const char *symbol);
282 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
283
284 /* modules using other modules: kdb wants to see this. */
285 struct module_use {
286 struct list_head source_list;
287 struct list_head target_list;
288 struct module *source, *target;
289 };
290
291 enum module_state {
292 MODULE_STATE_LIVE, /* Normal state. */
293 MODULE_STATE_COMING, /* Full formed, running module_init. */
294 MODULE_STATE_GOING, /* Going away. */
295 MODULE_STATE_UNFORMED, /* Still setting it up. */
296 };
297
298 struct module;
299
300 struct mod_tree_node {
301 struct module *mod;
302 struct latch_tree_node node;
303 };
304
305 struct module_layout {
306 /* The actual code + data. */
307 void *base;
308 /* Total size. */
309 unsigned int size;
310 /* The size of the executable code. */
311 unsigned int text_size;
312 /* Size of RO section of the module (text+rodata) */
313 unsigned int ro_size;
314
315 #ifdef CONFIG_MODULES_TREE_LOOKUP
316 struct mod_tree_node mtn;
317 #endif
318 };
319
320 #ifdef CONFIG_MODULES_TREE_LOOKUP
321 /* Only touch one cacheline for common rbtree-for-core-layout case. */
322 #define __module_layout_align ____cacheline_aligned
323 #else
324 #define __module_layout_align
325 #endif
326
327 struct mod_kallsyms {
328 Elf_Sym *symtab;
329 unsigned int num_symtab;
330 char *strtab;
331 };
332
333 #ifdef CONFIG_LIVEPATCH
334 struct klp_modinfo {
335 Elf_Ehdr hdr;
336 Elf_Shdr *sechdrs;
337 char *secstrings;
338 unsigned int symndx;
339 };
340 #endif
341
342 struct module {
343 enum module_state state;
344
345 /* Member of list of modules */
346 struct list_head list;
347
348 /* Unique handle for this module */
349 char name[MODULE_NAME_LEN];
350
351 /* Sysfs stuff. */
352 struct module_kobject mkobj;
353 struct module_attribute *modinfo_attrs;
354 const char *version;
355 const char *srcversion;
356 struct kobject *holders_dir;
357
358 /* Exported symbols */
359 const struct kernel_symbol *syms;
360 const unsigned long *crcs;
361 unsigned int num_syms;
362
363 /* Kernel parameters. */
364 #ifdef CONFIG_SYSFS
365 struct mutex param_lock;
366 #endif
367 struct kernel_param *kp;
368 unsigned int num_kp;
369
370 /* GPL-only exported symbols. */
371 unsigned int num_gpl_syms;
372 const struct kernel_symbol *gpl_syms;
373 const unsigned long *gpl_crcs;
374
375 #ifdef CONFIG_UNUSED_SYMBOLS
376 /* unused exported symbols. */
377 const struct kernel_symbol *unused_syms;
378 const unsigned long *unused_crcs;
379 unsigned int num_unused_syms;
380
381 /* GPL-only, unused exported symbols. */
382 unsigned int num_unused_gpl_syms;
383 const struct kernel_symbol *unused_gpl_syms;
384 const unsigned long *unused_gpl_crcs;
385 #endif
386
387 #ifdef CONFIG_MODULE_SIG
388 /* Signature was verified. */
389 bool sig_ok;
390 #endif
391
392 bool async_probe_requested;
393
394 /* symbols that will be GPL-only in the near future. */
395 const struct kernel_symbol *gpl_future_syms;
396 const unsigned long *gpl_future_crcs;
397 unsigned int num_gpl_future_syms;
398
399 /* Exception table */
400 unsigned int num_exentries;
401 struct exception_table_entry *extable;
402
403 /* Startup function. */
404 int (*init)(void);
405
406 /* Core layout: rbtree is accessed frequently, so keep together. */
407 struct module_layout core_layout __module_layout_align;
408 struct module_layout init_layout;
409
410 /* Arch-specific module values */
411 struct mod_arch_specific arch;
412
413 unsigned int taints; /* same bits as kernel:tainted */
414
415 #ifdef CONFIG_GENERIC_BUG
416 /* Support for BUG */
417 unsigned num_bugs;
418 struct list_head bug_list;
419 struct bug_entry *bug_table;
420 #endif
421
422 #ifdef CONFIG_KALLSYMS
423 /* Protected by RCU and/or module_mutex: use rcu_dereference() */
424 struct mod_kallsyms *kallsyms;
425 struct mod_kallsyms core_kallsyms;
426
427 /* Section attributes */
428 struct module_sect_attrs *sect_attrs;
429
430 /* Notes attributes */
431 struct module_notes_attrs *notes_attrs;
432 #endif
433
434 /* The command line arguments (may be mangled). People like
435 keeping pointers to this stuff */
436 char *args;
437
438 #ifdef CONFIG_SMP
439 /* Per-cpu data. */
440 void __percpu *percpu;
441 unsigned int percpu_size;
442 #endif
443
444 #ifdef CONFIG_TRACEPOINTS
445 unsigned int num_tracepoints;
446 struct tracepoint * const *tracepoints_ptrs;
447 #endif
448 #ifdef HAVE_JUMP_LABEL
449 struct jump_entry *jump_entries;
450 unsigned int num_jump_entries;
451 #endif
452 #ifdef CONFIG_TRACING
453 unsigned int num_trace_bprintk_fmt;
454 const char **trace_bprintk_fmt_start;
455 #endif
456 #ifdef CONFIG_EVENT_TRACING
457 struct trace_event_call **trace_events;
458 unsigned int num_trace_events;
459 struct trace_enum_map **trace_enums;
460 unsigned int num_trace_enums;
461 #endif
462 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
463 unsigned int num_ftrace_callsites;
464 unsigned long *ftrace_callsites;
465 #endif
466
467 #ifdef CONFIG_LIVEPATCH
468 bool klp; /* Is this a livepatch module? */
469 bool klp_alive;
470
471 /* Elf information */
472 struct klp_modinfo *klp_info;
473 #endif
474
475 #ifdef CONFIG_MODULE_UNLOAD
476 /* What modules depend on me? */
477 struct list_head source_list;
478 /* What modules do I depend on? */
479 struct list_head target_list;
480
481 /* Destruction function. */
482 void (*exit)(void);
483
484 atomic_t refcnt;
485 #endif
486
487 #ifdef CONFIG_CONSTRUCTORS
488 /* Constructor functions. */
489 ctor_fn_t *ctors;
490 unsigned int num_ctors;
491 #endif
492 } ____cacheline_aligned;
493 #ifndef MODULE_ARCH_INIT
494 #define MODULE_ARCH_INIT {}
495 #endif
496
497 extern struct mutex module_mutex;
498
499 /* FIXME: It'd be nice to isolate modules during init, too, so they
500 aren't used before they (may) fail. But presently too much code
501 (IDE & SCSI) require entry into the module during init.*/
502 static inline int module_is_live(struct module *mod)
503 {
504 return mod->state != MODULE_STATE_GOING;
505 }
506
507 struct module *__module_text_address(unsigned long addr);
508 struct module *__module_address(unsigned long addr);
509 bool is_module_address(unsigned long addr);
510 bool is_module_percpu_address(unsigned long addr);
511 bool is_module_text_address(unsigned long addr);
512
513 static inline bool within_module_core(unsigned long addr,
514 const struct module *mod)
515 {
516 return (unsigned long)mod->core_layout.base <= addr &&
517 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
518 }
519
520 static inline bool within_module_init(unsigned long addr,
521 const struct module *mod)
522 {
523 return (unsigned long)mod->init_layout.base <= addr &&
524 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
525 }
526
527 static inline bool within_module(unsigned long addr, const struct module *mod)
528 {
529 return within_module_init(addr, mod) || within_module_core(addr, mod);
530 }
531
532 /* Search for module by name: must hold module_mutex. */
533 struct module *find_module(const char *name);
534
535 struct symsearch {
536 const struct kernel_symbol *start, *stop;
537 const unsigned long *crcs;
538 enum {
539 NOT_GPL_ONLY,
540 GPL_ONLY,
541 WILL_BE_GPL_ONLY,
542 } licence;
543 bool unused;
544 };
545
546 /*
547 * Search for an exported symbol by name.
548 *
549 * Must be called with module_mutex held or preemption disabled.
550 */
551 const struct kernel_symbol *find_symbol(const char *name,
552 struct module **owner,
553 const unsigned long **crc,
554 bool gplok,
555 bool warn);
556
557 /*
558 * Walk the exported symbol table
559 *
560 * Must be called with module_mutex held or preemption disabled.
561 */
562 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
563 struct module *owner,
564 void *data), void *data);
565
566 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
567 symnum out of range. */
568 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
569 char *name, char *module_name, int *exported);
570
571 /* Look for this name: can be of form module:name. */
572 unsigned long module_kallsyms_lookup_name(const char *name);
573
574 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
575 struct module *, unsigned long),
576 void *data);
577
578 extern void __module_put_and_exit(struct module *mod, long code)
579 __attribute__((noreturn));
580 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
581
582 #ifdef CONFIG_MODULE_UNLOAD
583 int module_refcount(struct module *mod);
584 void __symbol_put(const char *symbol);
585 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
586 void symbol_put_addr(void *addr);
587
588 /* Sometimes we know we already have a refcount, and it's easier not
589 to handle the error case (which only happens with rmmod --wait). */
590 extern void __module_get(struct module *module);
591
592 /* This is the Right Way to get a module: if it fails, it's being removed,
593 * so pretend it's not there. */
594 extern bool try_module_get(struct module *module);
595
596 extern void module_put(struct module *module);
597
598 #else /*!CONFIG_MODULE_UNLOAD*/
599 static inline int try_module_get(struct module *module)
600 {
601 return !module || module_is_live(module);
602 }
603 static inline void module_put(struct module *module)
604 {
605 }
606 static inline void __module_get(struct module *module)
607 {
608 }
609 #define symbol_put(x) do { } while (0)
610 #define symbol_put_addr(p) do { } while (0)
611
612 #endif /* CONFIG_MODULE_UNLOAD */
613 int ref_module(struct module *a, struct module *b);
614
615 /* This is a #define so the string doesn't get put in every .o file */
616 #define module_name(mod) \
617 ({ \
618 struct module *__mod = (mod); \
619 __mod ? __mod->name : "kernel"; \
620 })
621
622 /* For kallsyms to ask for address resolution. namebuf should be at
623 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
624 * found, otherwise NULL. */
625 const char *module_address_lookup(unsigned long addr,
626 unsigned long *symbolsize,
627 unsigned long *offset,
628 char **modname,
629 char *namebuf);
630 int lookup_module_symbol_name(unsigned long addr, char *symname);
631 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
632
633 /* For extable.c to search modules' exception tables. */
634 const struct exception_table_entry *search_module_extables(unsigned long addr);
635
636 int register_module_notifier(struct notifier_block *nb);
637 int unregister_module_notifier(struct notifier_block *nb);
638
639 extern void print_modules(void);
640
641 static inline bool module_requested_async_probing(struct module *module)
642 {
643 return module && module->async_probe_requested;
644 }
645
646 #ifdef CONFIG_LIVEPATCH
647 static inline bool is_livepatch_module(struct module *mod)
648 {
649 return mod->klp;
650 }
651 #else /* !CONFIG_LIVEPATCH */
652 static inline bool is_livepatch_module(struct module *mod)
653 {
654 return false;
655 }
656 #endif /* CONFIG_LIVEPATCH */
657
658 #else /* !CONFIG_MODULES... */
659
660 /* Given an address, look for it in the exception tables. */
661 static inline const struct exception_table_entry *
662 search_module_extables(unsigned long addr)
663 {
664 return NULL;
665 }
666
667 static inline struct module *__module_address(unsigned long addr)
668 {
669 return NULL;
670 }
671
672 static inline struct module *__module_text_address(unsigned long addr)
673 {
674 return NULL;
675 }
676
677 static inline bool is_module_address(unsigned long addr)
678 {
679 return false;
680 }
681
682 static inline bool is_module_percpu_address(unsigned long addr)
683 {
684 return false;
685 }
686
687 static inline bool is_module_text_address(unsigned long addr)
688 {
689 return false;
690 }
691
692 /* Get/put a kernel symbol (calls should be symmetric) */
693 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
694 #define symbol_put(x) do { } while (0)
695 #define symbol_put_addr(x) do { } while (0)
696
697 static inline void __module_get(struct module *module)
698 {
699 }
700
701 static inline int try_module_get(struct module *module)
702 {
703 return 1;
704 }
705
706 static inline void module_put(struct module *module)
707 {
708 }
709
710 #define module_name(mod) "kernel"
711
712 /* For kallsyms to ask for address resolution. NULL means not found. */
713 static inline const char *module_address_lookup(unsigned long addr,
714 unsigned long *symbolsize,
715 unsigned long *offset,
716 char **modname,
717 char *namebuf)
718 {
719 return NULL;
720 }
721
722 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
723 {
724 return -ERANGE;
725 }
726
727 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
728 {
729 return -ERANGE;
730 }
731
732 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
733 char *type, char *name,
734 char *module_name, int *exported)
735 {
736 return -ERANGE;
737 }
738
739 static inline unsigned long module_kallsyms_lookup_name(const char *name)
740 {
741 return 0;
742 }
743
744 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
745 struct module *,
746 unsigned long),
747 void *data)
748 {
749 return 0;
750 }
751
752 static inline int register_module_notifier(struct notifier_block *nb)
753 {
754 /* no events will happen anyway, so this can always succeed */
755 return 0;
756 }
757
758 static inline int unregister_module_notifier(struct notifier_block *nb)
759 {
760 return 0;
761 }
762
763 #define module_put_and_exit(code) do_exit(code)
764
765 static inline void print_modules(void)
766 {
767 }
768
769 static inline bool module_requested_async_probing(struct module *module)
770 {
771 return false;
772 }
773
774 #endif /* CONFIG_MODULES */
775
776 #ifdef CONFIG_SYSFS
777 extern struct kset *module_kset;
778 extern struct kobj_type module_ktype;
779 extern int module_sysfs_initialized;
780 #endif /* CONFIG_SYSFS */
781
782 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
783
784 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
785
786 #define __MODULE_STRING(x) __stringify(x)
787
788 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
789 extern void set_all_modules_text_rw(void);
790 extern void set_all_modules_text_ro(void);
791 extern void module_enable_ro(const struct module *mod);
792 extern void module_disable_ro(const struct module *mod);
793 #else
794 static inline void set_all_modules_text_rw(void) { }
795 static inline void set_all_modules_text_ro(void) { }
796 static inline void module_enable_ro(const struct module *mod) { }
797 static inline void module_disable_ro(const struct module *mod) { }
798 #endif
799
800 #ifdef CONFIG_GENERIC_BUG
801 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
802 struct module *);
803 void module_bug_cleanup(struct module *);
804
805 #else /* !CONFIG_GENERIC_BUG */
806
807 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
808 const Elf_Shdr *sechdrs,
809 struct module *mod)
810 {
811 }
812 static inline void module_bug_cleanup(struct module *mod) {}
813 #endif /* CONFIG_GENERIC_BUG */
814
815 #ifdef CONFIG_MODULE_SIG
816 static inline bool module_sig_ok(struct module *module)
817 {
818 return module->sig_ok;
819 }
820 #else /* !CONFIG_MODULE_SIG */
821 static inline bool module_sig_ok(struct module *module)
822 {
823 return true;
824 }
825 #endif /* CONFIG_MODULE_SIG */
826
827 #endif /* _LINUX_MODULE_H */
828
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