Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/include/linux/module.h

  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/extable.h>      /* only as arch move module.h -> extable.h */
 22 #include <linux/rbtree_latch.h>
 23 
 24 #include <linux/percpu.h>
 25 #include <asm/module.h>
 26 
 27 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
 28 #define MODULE_SIG_STRING "~Module signature appended~\n"
 29 
 30 /* Not Yet Implemented */
 31 #define MODULE_SUPPORTED_DEVICE(name)
 32 
 33 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
 34 
 35 struct modversion_info {
 36         unsigned long crc;
 37         char name[MODULE_NAME_LEN];
 38 };
 39 
 40 struct module;
 41 struct exception_table_entry;
 42 
 43 struct module_kobject {
 44         struct kobject kobj;
 45         struct module *mod;
 46         struct kobject *drivers_dir;
 47         struct module_param_attrs *mp;
 48         struct completion *kobj_completion;
 49 };
 50 
 51 struct module_attribute {
 52         struct attribute attr;
 53         ssize_t (*show)(struct module_attribute *, struct module_kobject *,
 54                         char *);
 55         ssize_t (*store)(struct module_attribute *, struct module_kobject *,
 56                          const char *, size_t count);
 57         void (*setup)(struct module *, const char *);
 58         int (*test)(struct module *);
 59         void (*free)(struct module *);
 60 };
 61 
 62 struct module_version_attribute {
 63         struct module_attribute mattr;
 64         const char *module_name;
 65         const char *version;
 66 } __attribute__ ((__aligned__(sizeof(void *))));
 67 
 68 extern ssize_t __modver_version_show(struct module_attribute *,
 69                                      struct module_kobject *, char *);
 70 
 71 extern struct module_attribute module_uevent;
 72 
 73 /* These are either module local, or the kernel's dummy ones. */
 74 extern int init_module(void);
 75 extern void cleanup_module(void);
 76 
 77 #ifndef MODULE
 78 /**
 79  * module_init() - driver initialization entry point
 80  * @x: function to be run at kernel boot time or module insertion
 81  *
 82  * module_init() will either be called during do_initcalls() (if
 83  * builtin) or at module insertion time (if a module).  There can only
 84  * be one per module.
 85  */
 86 #define module_init(x)  __initcall(x);
 87 
 88 /**
 89  * module_exit() - driver exit entry point
 90  * @x: function to be run when driver is removed
 91  *
 92  * module_exit() will wrap the driver clean-up code
 93  * with cleanup_module() when used with rmmod when
 94  * the driver is a module.  If the driver is statically
 95  * compiled into the kernel, module_exit() has no effect.
 96  * There can only be one per module.
 97  */
 98 #define module_exit(x)  __exitcall(x);
 99 
100 #else /* MODULE */
101 
102 /*
103  * In most cases loadable modules do not need custom
104  * initcall levels. There are still some valid cases where
105  * a driver may be needed early if built in, and does not
106  * matter when built as a loadable module. Like bus
107  * snooping debug drivers.
108  */
109 #define early_initcall(fn)              module_init(fn)
110 #define core_initcall(fn)               module_init(fn)
111 #define core_initcall_sync(fn)          module_init(fn)
112 #define postcore_initcall(fn)           module_init(fn)
113 #define postcore_initcall_sync(fn)      module_init(fn)
114 #define arch_initcall(fn)               module_init(fn)
115 #define subsys_initcall(fn)             module_init(fn)
116 #define subsys_initcall_sync(fn)        module_init(fn)
117 #define fs_initcall(fn)                 module_init(fn)
118 #define fs_initcall_sync(fn)            module_init(fn)
119 #define rootfs_initcall(fn)             module_init(fn)
120 #define device_initcall(fn)             module_init(fn)
121 #define device_initcall_sync(fn)        module_init(fn)
122 #define late_initcall(fn)               module_init(fn)
123 #define late_initcall_sync(fn)          module_init(fn)
124 
125 #define console_initcall(fn)            module_init(fn)
126 #define security_initcall(fn)           module_init(fn)
127 
128 /* Each module must use one module_init(). */
129 #define module_init(initfn)                                     \
130         static inline initcall_t __inittest(void)               \
131         { return initfn; }                                      \
132         int init_module(void) __attribute__((alias(#initfn)));
133 
134 /* This is only required if you want to be unloadable. */
135 #define module_exit(exitfn)                                     \
136         static inline exitcall_t __exittest(void)               \
137         { return exitfn; }                                      \
138         void cleanup_module(void) __attribute__((alias(#exitfn)));
139 
140 #endif
141 
142 /* This means "can be init if no module support, otherwise module load
143    may call it." */
144 #ifdef CONFIG_MODULES
145 #define __init_or_module
146 #define __initdata_or_module
147 #define __initconst_or_module
148 #define __INIT_OR_MODULE        .text
149 #define __INITDATA_OR_MODULE    .data
150 #define __INITRODATA_OR_MODULE  .section ".rodata","a",%progbits
151 #else
152 #define __init_or_module __init
153 #define __initdata_or_module __initdata
154 #define __initconst_or_module __initconst
155 #define __INIT_OR_MODULE __INIT
156 #define __INITDATA_OR_MODULE __INITDATA
157 #define __INITRODATA_OR_MODULE __INITRODATA
158 #endif /*CONFIG_MODULES*/
159 
160 /* Generic info of form tag = "info" */
161 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
162 
163 /* For userspace: you can also call me... */
164 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
165 
166 /* Soft module dependencies. See man modprobe.d for details.
167  * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
168  */
169 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
170 
171 /*
172  * The following license idents are currently accepted as indicating free
173  * software modules
174  *
175  *      "GPL"                           [GNU Public License v2 or later]
176  *      "GPL v2"                        [GNU Public License v2]
177  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
178  *      "Dual BSD/GPL"                  [GNU Public License v2
179  *                                       or BSD license choice]
180  *      "Dual MIT/GPL"                  [GNU Public License v2
181  *                                       or MIT license choice]
182  *      "Dual MPL/GPL"                  [GNU Public License v2
183  *                                       or Mozilla license choice]
184  *
185  * The following other idents are available
186  *
187  *      "Proprietary"                   [Non free products]
188  *
189  * There are dual licensed components, but when running with Linux it is the
190  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
191  * is a GPL combined work.
192  *
193  * This exists for several reasons
194  * 1.   So modinfo can show license info for users wanting to vet their setup
195  *      is free
196  * 2.   So the community can ignore bug reports including proprietary modules
197  * 3.   So vendors can do likewise based on their own policies
198  */
199 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
200 
201 /*
202  * Author(s), use "Name <email>" or just "Name", for multiple
203  * authors use multiple MODULE_AUTHOR() statements/lines.
204  */
205 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
206 
207 /* What your module does. */
208 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
209 
210 #ifdef MODULE
211 /* Creates an alias so file2alias.c can find device table. */
212 #define MODULE_DEVICE_TABLE(type, name)                                 \
213 extern const typeof(name) __mod_##type##__##name##_device_table         \
214   __attribute__ ((unused, alias(__stringify(name))))
215 #else  /* !MODULE */
216 #define MODULE_DEVICE_TABLE(type, name)
217 #endif
218 
219 /* Version of form [<epoch>:]<version>[-<extra-version>].
220  * Or for CVS/RCS ID version, everything but the number is stripped.
221  * <epoch>: A (small) unsigned integer which allows you to start versions
222  * anew. If not mentioned, it's zero.  eg. "2:1.0" is after
223  * "1:2.0".
224 
225  * <version>: The <version> may contain only alphanumerics and the
226  * character `.'.  Ordered by numeric sort for numeric parts,
227  * ascii sort for ascii parts (as per RPM or DEB algorithm).
228 
229  * <extraversion>: Like <version>, but inserted for local
230  * customizations, eg "rh3" or "rusty1".
231 
232  * Using this automatically adds a checksum of the .c files and the
233  * local headers in "srcversion".
234  */
235 
236 #if defined(MODULE) || !defined(CONFIG_SYSFS)
237 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
238 #else
239 #define MODULE_VERSION(_version)                                        \
240         static struct module_version_attribute ___modver_attr = {       \
241                 .mattr  = {                                             \
242                         .attr   = {                                     \
243                                 .name   = "version",                    \
244                                 .mode   = S_IRUGO,                      \
245                         },                                              \
246                         .show   = __modver_version_show,                \
247                 },                                                      \
248                 .module_name    = KBUILD_MODNAME,                       \
249                 .version        = _version,                             \
250         };                                                              \
251         static const struct module_version_attribute                    \
252         __used __attribute__ ((__section__ ("__modver")))               \
253         * __moduleparam_const __modver_attr = &___modver_attr
254 #endif
255 
256 /* Optional firmware file (or files) needed by the module
257  * format is simply firmware file name.  Multiple firmware
258  * files require multiple MODULE_FIRMWARE() specifiers */
259 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
260 
261 struct notifier_block;
262 
263 #ifdef CONFIG_MODULES
264 
265 extern int modules_disabled; /* for sysctl */
266 /* Get/put a kernel symbol (calls must be symmetric) */
267 void *__symbol_get(const char *symbol);
268 void *__symbol_get_gpl(const char *symbol);
269 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
270 
271 /* modules using other modules: kdb wants to see this. */
272 struct module_use {
273         struct list_head source_list;
274         struct list_head target_list;
275         struct module *source, *target;
276 };
277 
278 enum module_state {
279         MODULE_STATE_LIVE,      /* Normal state. */
280         MODULE_STATE_COMING,    /* Full formed, running module_init. */
281         MODULE_STATE_GOING,     /* Going away. */
282         MODULE_STATE_UNFORMED,  /* Still setting it up. */
283 };
284 
285 struct module;
286 
287 struct mod_tree_node {
288         struct module *mod;
289         struct latch_tree_node node;
290 };
291 
292 struct module_layout {
293         /* The actual code + data. */
294         void *base;
295         /* Total size. */
296         unsigned int size;
297         /* The size of the executable code.  */
298         unsigned int text_size;
299         /* Size of RO section of the module (text+rodata) */
300         unsigned int ro_size;
301         /* Size of RO after init section */
302         unsigned int ro_after_init_size;
303 
304 #ifdef CONFIG_MODULES_TREE_LOOKUP
305         struct mod_tree_node mtn;
306 #endif
307 };
308 
309 #ifdef CONFIG_MODULES_TREE_LOOKUP
310 /* Only touch one cacheline for common rbtree-for-core-layout case. */
311 #define __module_layout_align ____cacheline_aligned
312 #else
313 #define __module_layout_align
314 #endif
315 
316 struct mod_kallsyms {
317         Elf_Sym *symtab;
318         unsigned int num_symtab;
319         char *strtab;
320 };
321 
322 #ifdef CONFIG_LIVEPATCH
323 struct klp_modinfo {
324         Elf_Ehdr hdr;
325         Elf_Shdr *sechdrs;
326         char *secstrings;
327         unsigned int symndx;
328 };
329 #endif
330 
331 struct module {
332         enum module_state state;
333 
334         /* Member of list of modules */
335         struct list_head list;
336 
337         /* Unique handle for this module */
338         char name[MODULE_NAME_LEN];
339 
340         /* Sysfs stuff. */
341         struct module_kobject mkobj;
342         struct module_attribute *modinfo_attrs;
343         const char *version;
344         const char *srcversion;
345         struct kobject *holders_dir;
346 
347         /* Exported symbols */
348         const struct kernel_symbol *syms;
349         const s32 *crcs;
350         unsigned int num_syms;
351 
352         /* Kernel parameters. */
353 #ifdef CONFIG_SYSFS
354         struct mutex param_lock;
355 #endif
356         struct kernel_param *kp;
357         unsigned int num_kp;
358 
359         /* GPL-only exported symbols. */
360         unsigned int num_gpl_syms;
361         const struct kernel_symbol *gpl_syms;
362         const s32 *gpl_crcs;
363 
364 #ifdef CONFIG_UNUSED_SYMBOLS
365         /* unused exported symbols. */
366         const struct kernel_symbol *unused_syms;
367         const s32 *unused_crcs;
368         unsigned int num_unused_syms;
369 
370         /* GPL-only, unused exported symbols. */
371         unsigned int num_unused_gpl_syms;
372         const struct kernel_symbol *unused_gpl_syms;
373         const s32 *unused_gpl_crcs;
374 #endif
375 
376 #ifdef CONFIG_MODULE_SIG
377         /* Signature was verified. */
378         bool sig_ok;
379 #endif
380 
381         bool async_probe_requested;
382 
383         /* symbols that will be GPL-only in the near future. */
384         const struct kernel_symbol *gpl_future_syms;
385         const s32 *gpl_future_crcs;
386         unsigned int num_gpl_future_syms;
387 
388         /* Exception table */
389         unsigned int num_exentries;
390         struct exception_table_entry *extable;
391 
392         /* Startup function. */
393         int (*init)(void);
394 
395         /* Core layout: rbtree is accessed frequently, so keep together. */
396         struct module_layout core_layout __module_layout_align;
397         struct module_layout init_layout;
398 
399         /* Arch-specific module values */
400         struct mod_arch_specific arch;
401 
402         unsigned long taints;   /* same bits as kernel:taint_flags */
403 
404 #ifdef CONFIG_GENERIC_BUG
405         /* Support for BUG */
406         unsigned num_bugs;
407         struct list_head bug_list;
408         struct bug_entry *bug_table;
409 #endif
410 
411 #ifdef CONFIG_KALLSYMS
412         /* Protected by RCU and/or module_mutex: use rcu_dereference() */
413         struct mod_kallsyms *kallsyms;
414         struct mod_kallsyms core_kallsyms;
415 
416         /* Section attributes */
417         struct module_sect_attrs *sect_attrs;
418 
419         /* Notes attributes */
420         struct module_notes_attrs *notes_attrs;
421 #endif
422 
423         /* The command line arguments (may be mangled).  People like
424            keeping pointers to this stuff */
425         char *args;
426 
427 #ifdef CONFIG_SMP
428         /* Per-cpu data. */
429         void __percpu *percpu;
430         unsigned int percpu_size;
431 #endif
432 
433 #ifdef CONFIG_TRACEPOINTS
434         unsigned int num_tracepoints;
435         struct tracepoint * const *tracepoints_ptrs;
436 #endif
437 #ifdef HAVE_JUMP_LABEL
438         struct jump_entry *jump_entries;
439         unsigned int num_jump_entries;
440 #endif
441 #ifdef CONFIG_TRACING
442         unsigned int num_trace_bprintk_fmt;
443         const char **trace_bprintk_fmt_start;
444 #endif
445 #ifdef CONFIG_EVENT_TRACING
446         struct trace_event_call **trace_events;
447         unsigned int num_trace_events;
448         struct trace_enum_map **trace_enums;
449         unsigned int num_trace_enums;
450 #endif
451 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
452         unsigned int num_ftrace_callsites;
453         unsigned long *ftrace_callsites;
454 #endif
455 
456 #ifdef CONFIG_LIVEPATCH
457         bool klp; /* Is this a livepatch module? */
458         bool klp_alive;
459 
460         /* Elf information */
461         struct klp_modinfo *klp_info;
462 #endif
463 
464 #ifdef CONFIG_MODULE_UNLOAD
465         /* What modules depend on me? */
466         struct list_head source_list;
467         /* What modules do I depend on? */
468         struct list_head target_list;
469 
470         /* Destruction function. */
471         void (*exit)(void);
472 
473         atomic_t refcnt;
474 #endif
475 
476 #ifdef CONFIG_CONSTRUCTORS
477         /* Constructor functions. */
478         ctor_fn_t *ctors;
479         unsigned int num_ctors;
480 #endif
481 } ____cacheline_aligned;
482 #ifndef MODULE_ARCH_INIT
483 #define MODULE_ARCH_INIT {}
484 #endif
485 
486 extern struct mutex module_mutex;
487 
488 /* FIXME: It'd be nice to isolate modules during init, too, so they
489    aren't used before they (may) fail.  But presently too much code
490    (IDE & SCSI) require entry into the module during init.*/
491 static inline int module_is_live(struct module *mod)
492 {
493         return mod->state != MODULE_STATE_GOING;
494 }
495 
496 struct module *__module_text_address(unsigned long addr);
497 struct module *__module_address(unsigned long addr);
498 bool is_module_address(unsigned long addr);
499 bool is_module_percpu_address(unsigned long addr);
500 bool is_module_text_address(unsigned long addr);
501 
502 static inline bool within_module_core(unsigned long addr,
503                                       const struct module *mod)
504 {
505         return (unsigned long)mod->core_layout.base <= addr &&
506                addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
507 }
508 
509 static inline bool within_module_init(unsigned long addr,
510                                       const struct module *mod)
511 {
512         return (unsigned long)mod->init_layout.base <= addr &&
513                addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
514 }
515 
516 static inline bool within_module(unsigned long addr, const struct module *mod)
517 {
518         return within_module_init(addr, mod) || within_module_core(addr, mod);
519 }
520 
521 /* Search for module by name: must hold module_mutex. */
522 struct module *find_module(const char *name);
523 
524 struct symsearch {
525         const struct kernel_symbol *start, *stop;
526         const s32 *crcs;
527         enum {
528                 NOT_GPL_ONLY,
529                 GPL_ONLY,
530                 WILL_BE_GPL_ONLY,
531         } licence;
532         bool unused;
533 };
534 
535 /*
536  * Search for an exported symbol by name.
537  *
538  * Must be called with module_mutex held or preemption disabled.
539  */
540 const struct kernel_symbol *find_symbol(const char *name,
541                                         struct module **owner,
542                                         const s32 **crc,
543                                         bool gplok,
544                                         bool warn);
545 
546 /*
547  * Walk the exported symbol table
548  *
549  * Must be called with module_mutex held or preemption disabled.
550  */
551 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
552                                     struct module *owner,
553                                     void *data), void *data);
554 
555 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
556    symnum out of range. */
557 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
558                         char *name, char *module_name, int *exported);
559 
560 /* Look for this name: can be of form module:name. */
561 unsigned long module_kallsyms_lookup_name(const char *name);
562 
563 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
564                                              struct module *, unsigned long),
565                                    void *data);
566 
567 extern void __noreturn __module_put_and_exit(struct module *mod,
568                         long code);
569 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
570 
571 #ifdef CONFIG_MODULE_UNLOAD
572 int module_refcount(struct module *mod);
573 void __symbol_put(const char *symbol);
574 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
575 void symbol_put_addr(void *addr);
576 
577 /* Sometimes we know we already have a refcount, and it's easier not
578    to handle the error case (which only happens with rmmod --wait). */
579 extern void __module_get(struct module *module);
580 
581 /* This is the Right Way to get a module: if it fails, it's being removed,
582  * so pretend it's not there. */
583 extern bool try_module_get(struct module *module);
584 
585 extern void module_put(struct module *module);
586 
587 #else /*!CONFIG_MODULE_UNLOAD*/
588 static inline int try_module_get(struct module *module)
589 {
590         return !module || module_is_live(module);
591 }
592 static inline void module_put(struct module *module)
593 {
594 }
595 static inline void __module_get(struct module *module)
596 {
597 }
598 #define symbol_put(x) do { } while (0)
599 #define symbol_put_addr(p) do { } while (0)
600 
601 #endif /* CONFIG_MODULE_UNLOAD */
602 int ref_module(struct module *a, struct module *b);
603 
604 /* This is a #define so the string doesn't get put in every .o file */
605 #define module_name(mod)                        \
606 ({                                              \
607         struct module *__mod = (mod);           \
608         __mod ? __mod->name : "kernel";         \
609 })
610 
611 /* For kallsyms to ask for address resolution.  namebuf should be at
612  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
613  * found, otherwise NULL. */
614 const char *module_address_lookup(unsigned long addr,
615                             unsigned long *symbolsize,
616                             unsigned long *offset,
617                             char **modname,
618                             char *namebuf);
619 int lookup_module_symbol_name(unsigned long addr, char *symname);
620 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
621 
622 int register_module_notifier(struct notifier_block *nb);
623 int unregister_module_notifier(struct notifier_block *nb);
624 
625 extern void print_modules(void);
626 
627 static inline bool module_requested_async_probing(struct module *module)
628 {
629         return module && module->async_probe_requested;
630 }
631 
632 #ifdef CONFIG_LIVEPATCH
633 static inline bool is_livepatch_module(struct module *mod)
634 {
635         return mod->klp;
636 }
637 #else /* !CONFIG_LIVEPATCH */
638 static inline bool is_livepatch_module(struct module *mod)
639 {
640         return false;
641 }
642 #endif /* CONFIG_LIVEPATCH */
643 
644 #else /* !CONFIG_MODULES... */
645 
646 static inline struct module *__module_address(unsigned long addr)
647 {
648         return NULL;
649 }
650 
651 static inline struct module *__module_text_address(unsigned long addr)
652 {
653         return NULL;
654 }
655 
656 static inline bool is_module_address(unsigned long addr)
657 {
658         return false;
659 }
660 
661 static inline bool is_module_percpu_address(unsigned long addr)
662 {
663         return false;
664 }
665 
666 static inline bool is_module_text_address(unsigned long addr)
667 {
668         return false;
669 }
670 
671 /* Get/put a kernel symbol (calls should be symmetric) */
672 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
673 #define symbol_put(x) do { } while (0)
674 #define symbol_put_addr(x) do { } while (0)
675 
676 static inline void __module_get(struct module *module)
677 {
678 }
679 
680 static inline int try_module_get(struct module *module)
681 {
682         return 1;
683 }
684 
685 static inline void module_put(struct module *module)
686 {
687 }
688 
689 #define module_name(mod) "kernel"
690 
691 /* For kallsyms to ask for address resolution.  NULL means not found. */
692 static inline const char *module_address_lookup(unsigned long addr,
693                                           unsigned long *symbolsize,
694                                           unsigned long *offset,
695                                           char **modname,
696                                           char *namebuf)
697 {
698         return NULL;
699 }
700 
701 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
702 {
703         return -ERANGE;
704 }
705 
706 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
707 {
708         return -ERANGE;
709 }
710 
711 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
712                                         char *type, char *name,
713                                         char *module_name, int *exported)
714 {
715         return -ERANGE;
716 }
717 
718 static inline unsigned long module_kallsyms_lookup_name(const char *name)
719 {
720         return 0;
721 }
722 
723 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
724                                                            struct module *,
725                                                            unsigned long),
726                                                  void *data)
727 {
728         return 0;
729 }
730 
731 static inline int register_module_notifier(struct notifier_block *nb)
732 {
733         /* no events will happen anyway, so this can always succeed */
734         return 0;
735 }
736 
737 static inline int unregister_module_notifier(struct notifier_block *nb)
738 {
739         return 0;
740 }
741 
742 #define module_put_and_exit(code) do_exit(code)
743 
744 static inline void print_modules(void)
745 {
746 }
747 
748 static inline bool module_requested_async_probing(struct module *module)
749 {
750         return false;
751 }
752 
753 #endif /* CONFIG_MODULES */
754 
755 #ifdef CONFIG_SYSFS
756 extern struct kset *module_kset;
757 extern struct kobj_type module_ktype;
758 extern int module_sysfs_initialized;
759 #endif /* CONFIG_SYSFS */
760 
761 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
762 
763 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
764 
765 #define __MODULE_STRING(x) __stringify(x)
766 
767 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
768 extern void set_all_modules_text_rw(void);
769 extern void set_all_modules_text_ro(void);
770 extern void module_enable_ro(const struct module *mod, bool after_init);
771 extern void module_disable_ro(const struct module *mod);
772 #else
773 static inline void set_all_modules_text_rw(void) { }
774 static inline void set_all_modules_text_ro(void) { }
775 static inline void module_enable_ro(const struct module *mod, bool after_init) { }
776 static inline void module_disable_ro(const struct module *mod) { }
777 #endif
778 
779 #ifdef CONFIG_GENERIC_BUG
780 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
781                          struct module *);
782 void module_bug_cleanup(struct module *);
783 
784 #else   /* !CONFIG_GENERIC_BUG */
785 
786 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
787                                         const Elf_Shdr *sechdrs,
788                                         struct module *mod)
789 {
790 }
791 static inline void module_bug_cleanup(struct module *mod) {}
792 #endif  /* CONFIG_GENERIC_BUG */
793 
794 #ifdef CONFIG_MODULE_SIG
795 static inline bool module_sig_ok(struct module *module)
796 {
797         return module->sig_ok;
798 }
799 #else   /* !CONFIG_MODULE_SIG */
800 static inline bool module_sig_ok(struct module *module)
801 {
802         return true;
803 }
804 #endif  /* CONFIG_MODULE_SIG */
805 
806 #endif /* _LINUX_MODULE_H */
807 

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