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TOMOYO Linux Cross Reference
Linux/include/linux/module.h

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  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 {
306         enum module_state state;
307 
308         /* Member of list of modules */
309         struct list_head list;
310 
311         /* Unique handle for this module */
312         char name[MODULE_NAME_LEN];
313 
314         /* Sysfs stuff. */
315         struct module_kobject mkobj;
316         struct module_attribute *modinfo_attrs;
317         const char *version;
318         const char *srcversion;
319         struct kobject *holders_dir;
320 
321         /* Exported symbols */
322         const struct kernel_symbol *syms;
323         const unsigned long *crcs;
324         unsigned int num_syms;
325 
326         /* Kernel parameters. */
327 #ifdef CONFIG_SYSFS
328         struct mutex param_lock;
329 #endif
330         struct kernel_param *kp;
331         unsigned int num_kp;
332 
333         /* GPL-only exported symbols. */
334         unsigned int num_gpl_syms;
335         const struct kernel_symbol *gpl_syms;
336         const unsigned long *gpl_crcs;
337 
338 #ifdef CONFIG_UNUSED_SYMBOLS
339         /* unused exported symbols. */
340         const struct kernel_symbol *unused_syms;
341         const unsigned long *unused_crcs;
342         unsigned int num_unused_syms;
343 
344         /* GPL-only, unused exported symbols. */
345         unsigned int num_unused_gpl_syms;
346         const struct kernel_symbol *unused_gpl_syms;
347         const unsigned long *unused_gpl_crcs;
348 #endif
349 
350 #ifdef CONFIG_MODULE_SIG
351         /* Signature was verified. */
352         bool sig_ok;
353 #endif
354 
355         bool async_probe_requested;
356 
357         /* symbols that will be GPL-only in the near future. */
358         const struct kernel_symbol *gpl_future_syms;
359         const unsigned long *gpl_future_crcs;
360         unsigned int num_gpl_future_syms;
361 
362         /* Exception table */
363         unsigned int num_exentries;
364         struct exception_table_entry *extable;
365 
366         /* Startup function. */
367         int (*init)(void);
368 
369         /*
370          * If this is non-NULL, vfree() after init() returns.
371          *
372          * Cacheline align here, such that:
373          *   module_init, module_core, init_size, core_size,
374          *   init_text_size, core_text_size and mtn_core::{mod,node[0]}
375          * are on the same cacheline.
376          */
377         void *module_init       ____cacheline_aligned;
378 
379         /* Here is the actual code + data, vfree'd on unload. */
380         void *module_core;
381 
382         /* Here are the sizes of the init and core sections */
383         unsigned int init_size, core_size;
384 
385         /* The size of the executable code in each section.  */
386         unsigned int init_text_size, core_text_size;
387 
388 #ifdef CONFIG_MODULES_TREE_LOOKUP
389         /*
390          * We want mtn_core::{mod,node[0]} to be in the same cacheline as the
391          * above entries such that a regular lookup will only touch one
392          * cacheline.
393          */
394         struct mod_tree_node    mtn_core;
395         struct mod_tree_node    mtn_init;
396 #endif
397 
398         /* Size of RO sections of the module (text+rodata) */
399         unsigned int init_ro_size, core_ro_size;
400 
401         /* Arch-specific module values */
402         struct mod_arch_specific arch;
403 
404         unsigned int taints;    /* same bits as kernel:tainted */
405 
406 #ifdef CONFIG_GENERIC_BUG
407         /* Support for BUG */
408         unsigned num_bugs;
409         struct list_head bug_list;
410         struct bug_entry *bug_table;
411 #endif
412 
413 #ifdef CONFIG_KALLSYMS
414         /*
415          * We keep the symbol and string tables for kallsyms.
416          * The core_* fields below are temporary, loader-only (they
417          * could really be discarded after module init).
418          */
419         Elf_Sym *symtab, *core_symtab;
420         unsigned int num_symtab, core_num_syms;
421         char *strtab, *core_strtab;
422 
423         /* Section attributes */
424         struct module_sect_attrs *sect_attrs;
425 
426         /* Notes attributes */
427         struct module_notes_attrs *notes_attrs;
428 #endif
429 
430         /* The command line arguments (may be mangled).  People like
431            keeping pointers to this stuff */
432         char *args;
433 
434 #ifdef CONFIG_SMP
435         /* Per-cpu data. */
436         void __percpu *percpu;
437         unsigned int percpu_size;
438 #endif
439 
440 #ifdef CONFIG_TRACEPOINTS
441         unsigned int num_tracepoints;
442         struct tracepoint * const *tracepoints_ptrs;
443 #endif
444 #ifdef HAVE_JUMP_LABEL
445         struct jump_entry *jump_entries;
446         unsigned int num_jump_entries;
447 #endif
448 #ifdef CONFIG_TRACING
449         unsigned int num_trace_bprintk_fmt;
450         const char **trace_bprintk_fmt_start;
451 #endif
452 #ifdef CONFIG_EVENT_TRACING
453         struct trace_event_call **trace_events;
454         unsigned int num_trace_events;
455         struct trace_enum_map **trace_enums;
456         unsigned int num_trace_enums;
457 #endif
458 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
459         unsigned int num_ftrace_callsites;
460         unsigned long *ftrace_callsites;
461 #endif
462 
463 #ifdef CONFIG_LIVEPATCH
464         bool klp_alive;
465 #endif
466 
467 #ifdef CONFIG_MODULE_UNLOAD
468         /* What modules depend on me? */
469         struct list_head source_list;
470         /* What modules do I depend on? */
471         struct list_head target_list;
472 
473         /* Destruction function. */
474         void (*exit)(void);
475 
476         atomic_t refcnt;
477 #endif
478 
479 #ifdef CONFIG_CONSTRUCTORS
480         /* Constructor functions. */
481         ctor_fn_t *ctors;
482         unsigned int num_ctors;
483 #endif
484 } ____cacheline_aligned;
485 #ifndef MODULE_ARCH_INIT
486 #define MODULE_ARCH_INIT {}
487 #endif
488 
489 extern struct mutex module_mutex;
490 
491 /* FIXME: It'd be nice to isolate modules during init, too, so they
492    aren't used before they (may) fail.  But presently too much code
493    (IDE & SCSI) require entry into the module during init.*/
494 static inline int module_is_live(struct module *mod)
495 {
496         return mod->state != MODULE_STATE_GOING;
497 }
498 
499 struct module *__module_text_address(unsigned long addr);
500 struct module *__module_address(unsigned long addr);
501 bool is_module_address(unsigned long addr);
502 bool is_module_percpu_address(unsigned long addr);
503 bool is_module_text_address(unsigned long addr);
504 
505 static inline bool within_module_core(unsigned long addr,
506                                       const struct module *mod)
507 {
508         return (unsigned long)mod->module_core <= addr &&
509                addr < (unsigned long)mod->module_core + mod->core_size;
510 }
511 
512 static inline bool within_module_init(unsigned long addr,
513                                       const struct module *mod)
514 {
515         return (unsigned long)mod->module_init <= addr &&
516                addr < (unsigned long)mod->module_init + mod->init_size;
517 }
518 
519 static inline bool within_module(unsigned long addr, const struct module *mod)
520 {
521         return within_module_init(addr, mod) || within_module_core(addr, mod);
522 }
523 
524 /* Search for module by name: must hold module_mutex. */
525 struct module *find_module(const char *name);
526 
527 struct symsearch {
528         const struct kernel_symbol *start, *stop;
529         const unsigned long *crcs;
530         enum {
531                 NOT_GPL_ONLY,
532                 GPL_ONLY,
533                 WILL_BE_GPL_ONLY,
534         } licence;
535         bool unused;
536 };
537 
538 /*
539  * Search for an exported symbol by name.
540  *
541  * Must be called with module_mutex held or preemption disabled.
542  */
543 const struct kernel_symbol *find_symbol(const char *name,
544                                         struct module **owner,
545                                         const unsigned long **crc,
546                                         bool gplok,
547                                         bool warn);
548 
549 /*
550  * Walk the exported symbol table
551  *
552  * Must be called with module_mutex held or preemption disabled.
553  */
554 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
555                                     struct module *owner,
556                                     void *data), void *data);
557 
558 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
559    symnum out of range. */
560 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
561                         char *name, char *module_name, int *exported);
562 
563 /* Look for this name: can be of form module:name. */
564 unsigned long module_kallsyms_lookup_name(const char *name);
565 
566 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
567                                              struct module *, unsigned long),
568                                    void *data);
569 
570 extern void __module_put_and_exit(struct module *mod, long code)
571         __attribute__((noreturn));
572 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
573 
574 #ifdef CONFIG_MODULE_UNLOAD
575 int module_refcount(struct module *mod);
576 void __symbol_put(const char *symbol);
577 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
578 void symbol_put_addr(void *addr);
579 
580 /* Sometimes we know we already have a refcount, and it's easier not
581    to handle the error case (which only happens with rmmod --wait). */
582 extern void __module_get(struct module *module);
583 
584 /* This is the Right Way to get a module: if it fails, it's being removed,
585  * so pretend it's not there. */
586 extern bool try_module_get(struct module *module);
587 
588 extern void module_put(struct module *module);
589 
590 #else /*!CONFIG_MODULE_UNLOAD*/
591 static inline int try_module_get(struct module *module)
592 {
593         return !module || module_is_live(module);
594 }
595 static inline void module_put(struct module *module)
596 {
597 }
598 static inline void __module_get(struct module *module)
599 {
600 }
601 #define symbol_put(x) do { } while (0)
602 #define symbol_put_addr(p) do { } while (0)
603 
604 #endif /* CONFIG_MODULE_UNLOAD */
605 int ref_module(struct module *a, struct module *b);
606 
607 /* This is a #define so the string doesn't get put in every .o file */
608 #define module_name(mod)                        \
609 ({                                              \
610         struct module *__mod = (mod);           \
611         __mod ? __mod->name : "kernel";         \
612 })
613 
614 /* For kallsyms to ask for address resolution.  namebuf should be at
615  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
616  * found, otherwise NULL. */
617 const char *module_address_lookup(unsigned long addr,
618                             unsigned long *symbolsize,
619                             unsigned long *offset,
620                             char **modname,
621                             char *namebuf);
622 int lookup_module_symbol_name(unsigned long addr, char *symname);
623 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
624 
625 /* For extable.c to search modules' exception tables. */
626 const struct exception_table_entry *search_module_extables(unsigned long addr);
627 
628 int register_module_notifier(struct notifier_block *nb);
629 int unregister_module_notifier(struct notifier_block *nb);
630 
631 extern void print_modules(void);
632 
633 static inline bool module_requested_async_probing(struct module *module)
634 {
635         return module && module->async_probe_requested;
636 }
637 
638 #else /* !CONFIG_MODULES... */
639 
640 /* Given an address, look for it in the exception tables. */
641 static inline const struct exception_table_entry *
642 search_module_extables(unsigned long addr)
643 {
644         return NULL;
645 }
646 
647 static inline struct module *__module_address(unsigned long addr)
648 {
649         return NULL;
650 }
651 
652 static inline struct module *__module_text_address(unsigned long addr)
653 {
654         return NULL;
655 }
656 
657 static inline bool is_module_address(unsigned long addr)
658 {
659         return false;
660 }
661 
662 static inline bool is_module_percpu_address(unsigned long addr)
663 {
664         return false;
665 }
666 
667 static inline bool is_module_text_address(unsigned long addr)
668 {
669         return false;
670 }
671 
672 /* Get/put a kernel symbol (calls should be symmetric) */
673 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
674 #define symbol_put(x) do { } while (0)
675 #define symbol_put_addr(x) do { } while (0)
676 
677 static inline void __module_get(struct module *module)
678 {
679 }
680 
681 static inline int try_module_get(struct module *module)
682 {
683         return 1;
684 }
685 
686 static inline void module_put(struct module *module)
687 {
688 }
689 
690 #define module_name(mod) "kernel"
691 
692 /* For kallsyms to ask for address resolution.  NULL means not found. */
693 static inline const char *module_address_lookup(unsigned long addr,
694                                           unsigned long *symbolsize,
695                                           unsigned long *offset,
696                                           char **modname,
697                                           char *namebuf)
698 {
699         return NULL;
700 }
701 
702 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
703 {
704         return -ERANGE;
705 }
706 
707 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
708 {
709         return -ERANGE;
710 }
711 
712 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
713                                         char *type, char *name,
714                                         char *module_name, int *exported)
715 {
716         return -ERANGE;
717 }
718 
719 static inline unsigned long module_kallsyms_lookup_name(const char *name)
720 {
721         return 0;
722 }
723 
724 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
725                                                            struct module *,
726                                                            unsigned long),
727                                                  void *data)
728 {
729         return 0;
730 }
731 
732 static inline int register_module_notifier(struct notifier_block *nb)
733 {
734         /* no events will happen anyway, so this can always succeed */
735         return 0;
736 }
737 
738 static inline int unregister_module_notifier(struct notifier_block *nb)
739 {
740         return 0;
741 }
742 
743 #define module_put_and_exit(code) do_exit(code)
744 
745 static inline void print_modules(void)
746 {
747 }
748 
749 static inline bool module_requested_async_probing(struct module *module)
750 {
751         return false;
752 }
753 
754 #endif /* CONFIG_MODULES */
755 
756 #ifdef CONFIG_SYSFS
757 extern struct kset *module_kset;
758 extern struct kobj_type module_ktype;
759 extern int module_sysfs_initialized;
760 #endif /* CONFIG_SYSFS */
761 
762 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
763 
764 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
765 
766 #define __MODULE_STRING(x) __stringify(x)
767 
768 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
769 extern void set_all_modules_text_rw(void);
770 extern void set_all_modules_text_ro(void);
771 #else
772 static inline void set_all_modules_text_rw(void) { }
773 static inline void set_all_modules_text_ro(void) { }
774 #endif
775 
776 #ifdef CONFIG_GENERIC_BUG
777 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
778                          struct module *);
779 void module_bug_cleanup(struct module *);
780 
781 #else   /* !CONFIG_GENERIC_BUG */
782 
783 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
784                                         const Elf_Shdr *sechdrs,
785                                         struct module *mod)
786 {
787 }
788 static inline void module_bug_cleanup(struct module *mod) {}
789 #endif  /* CONFIG_GENERIC_BUG */
790 
791 #ifdef CONFIG_MODULE_SIG
792 static inline bool module_sig_ok(struct module *module)
793 {
794         return module->sig_ok;
795 }
796 #else   /* !CONFIG_MODULE_SIG */
797 static inline bool module_sig_ok(struct module *module)
798 {
799         return true;
800 }
801 #endif  /* CONFIG_MODULE_SIG */
802 
803 #endif /* _LINUX_MODULE_H */
804 

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