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/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 <linux/percpu.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
  37struct kernel_symbol
  38{
  39        unsigned long value;
  40        const char *name;
  41};
  42
  43struct modversion_info
  44{
  45        unsigned long crc;
  46        char name[MODULE_NAME_LEN];
  47};
  48
  49struct module;
  50
  51struct 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
  61struct module_version_attribute {
  62        struct module_attribute mattr;
  63        const char *module_name;
  64        const char *version;
  65} __attribute__ ((__aligned__(sizeof(void *))));
  66
  67struct module_kobject
  68{
  69        struct kobject kobj;
  70        struct module *mod;
  71        struct kobject *drivers_dir;
  72        struct module_param_attrs *mp;
  73};
  74
  75/* These are either module local, or the kernel's dummy ones. */
  76extern int init_module(void);
  77extern void cleanup_module(void);
  78
  79/* Archs provide a method of finding the correct exception table. */
  80struct exception_table_entry;
  81
  82const struct exception_table_entry *
  83search_extable(const struct exception_table_entry *first,
  84               const struct exception_table_entry *last,
  85               unsigned long value);
  86void sort_extable(struct exception_table_entry *start,
  87                  struct exception_table_entry *finish);
  88void sort_main_extable(void);
  89void trim_init_extable(struct module *m);
  90
  91#ifdef MODULE
  92#define MODULE_GENERIC_TABLE(gtype,name)                        \
  93extern const struct gtype##_id __mod_##gtype##_table            \
  94  __attribute__ ((unused, alias(__stringify(name))))
  95
  96extern struct module __this_module;
  97#define THIS_MODULE (&__this_module)
  98#else  /* !MODULE */
  99#define MODULE_GENERIC_TABLE(gtype,name)
 100#define THIS_MODULE ((struct module *)0)
 101#endif
 102
 103/* Generic info of form tag = "info" */
 104#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
 105
 106/* For userspace: you can also call me... */
 107#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
 108
 109/*
 110 * The following license idents are currently accepted as indicating free
 111 * software modules
 112 *
 113 *      "GPL"                           [GNU Public License v2 or later]
 114 *      "GPL v2"                        [GNU Public License v2]
 115 *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 116 *      "Dual BSD/GPL"                  [GNU Public License v2
 117 *                                       or BSD license choice]
 118 *      "Dual MIT/GPL"                  [GNU Public License v2
 119 *                                       or MIT license choice]
 120 *      "Dual MPL/GPL"                  [GNU Public License v2
 121 *                                       or Mozilla license choice]
 122 *
 123 * The following other idents are available
 124 *
 125 *      "Proprietary"                   [Non free products]
 126 *
 127 * There are dual licensed components, but when running with Linux it is the
 128 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 129 * is a GPL combined work.
 130 *
 131 * This exists for several reasons
 132 * 1.   So modinfo can show license info for users wanting to vet their setup 
 133 *      is free
 134 * 2.   So the community can ignore bug reports including proprietary modules
 135 * 3.   So vendors can do likewise based on their own policies
 136 */
 137#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 138
 139/*
 140 * Author(s), use "Name <email>" or just "Name", for multiple
 141 * authors use multiple MODULE_AUTHOR() statements/lines.
 142 */
 143#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
 144  
 145/* What your module does. */
 146#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 147
 148/* One for each parameter, describing how to use it.  Some files do
 149   multiple of these per line, so can't just use MODULE_INFO. */
 150#define MODULE_PARM_DESC(_parm, desc) \
 151        __MODULE_INFO(parm, _parm, #_parm ":" desc)
 152
 153#define MODULE_DEVICE_TABLE(type,name)          \
 154  MODULE_GENERIC_TABLE(type##_device,name)
 155
 156/* Version of form [<epoch>:]<version>[-<extra-version>].
 157   Or for CVS/RCS ID version, everything but the number is stripped.
 158  <epoch>: A (small) unsigned integer which allows you to start versions
 159           anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 160           "1:2.0".
 161  <version>: The <version> may contain only alphanumerics and the
 162           character `.'.  Ordered by numeric sort for numeric parts,
 163           ascii sort for ascii parts (as per RPM or DEB algorithm).
 164  <extraversion>: Like <version>, but inserted for local
 165           customizations, eg "rh3" or "rusty1".
 166
 167  Using this automatically adds a checksum of the .c files and the
 168  local headers in "srcversion".
 169*/
 170
 171#if defined(MODULE) || !defined(CONFIG_SYSFS)
 172#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 173#else
 174#define MODULE_VERSION(_version)                                        \
 175        extern ssize_t __modver_version_show(struct module_attribute *, \
 176                                             struct module *, char *);  \
 177        static struct module_version_attribute __modver_version_attr    \
 178        __used                                                          \
 179    __attribute__ ((__section__ ("__modver"),aligned(sizeof(void *)))) \
 180        = {                                                             \
 181                .mattr  = {                                             \
 182                        .attr   = {                                     \
 183                                .name   = "version",                    \
 184                                .mode   = S_IRUGO,                      \
 185                        },                                              \
 186                        .show   = __modver_version_show,                \
 187                },                                                      \
 188                .module_name    = KBUILD_MODNAME,                       \
 189                .version        = _version,                             \
 190        }
 191#endif
 192
 193/* Optional firmware file (or files) needed by the module
 194 * format is simply firmware file name.  Multiple firmware
 195 * files require multiple MODULE_FIRMWARE() specifiers */
 196#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 197
 198/* Given an address, look for it in the exception tables */
 199const struct exception_table_entry *search_exception_tables(unsigned long add);
 200
 201struct notifier_block;
 202
 203#ifdef CONFIG_MODULES
 204
 205extern int modules_disabled; /* for sysctl */
 206/* Get/put a kernel symbol (calls must be symmetric) */
 207void *__symbol_get(const char *symbol);
 208void *__symbol_get_gpl(const char *symbol);
 209#define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
 210
 211/* modules using other modules: kdb wants to see this. */
 212struct module_use {
 213        struct list_head source_list;
 214        struct list_head target_list;
 215        struct module *source, *target;
 216};
 217
 218#ifndef __GENKSYMS__
 219#ifdef CONFIG_MODVERSIONS
 220/* Mark the CRC weak since genksyms apparently decides not to
 221 * generate a checksums for some symbols */
 222#define __CRC_SYMBOL(sym, sec)                                  \
 223        extern void *__crc_##sym __attribute__((weak));         \
 224        static const unsigned long __kcrctab_##sym              \
 225        __used                                                  \
 226        __attribute__((section("__kcrctab" sec), unused))       \
 227        = (unsigned long) &__crc_##sym;
 228#else
 229#define __CRC_SYMBOL(sym, sec)
 230#endif
 231
 232/* For every exported symbol, place a struct in the __ksymtab section */
 233#define __EXPORT_SYMBOL(sym, sec)                               \
 234        extern typeof(sym) sym;                                 \
 235        __CRC_SYMBOL(sym, sec)                                  \
 236        static const char __kstrtab_##sym[]                     \
 237        __attribute__((section("__ksymtab_strings"), aligned(1))) \
 238        = MODULE_SYMBOL_PREFIX #sym;                            \
 239        static const struct kernel_symbol __ksymtab_##sym       \
 240        __used                                                  \
 241        __attribute__((section("__ksymtab" sec), unused))       \
 242        = { (unsigned long)&sym, __kstrtab_##sym }
 243
 244#define EXPORT_SYMBOL(sym)                                      \
 245        __EXPORT_SYMBOL(sym, "")
 246
 247#define EXPORT_SYMBOL_GPL(sym)                                  \
 248        __EXPORT_SYMBOL(sym, "_gpl")
 249
 250#define EXPORT_SYMBOL_GPL_FUTURE(sym)                           \
 251        __EXPORT_SYMBOL(sym, "_gpl_future")
 252
 253
 254#ifdef CONFIG_UNUSED_SYMBOLS
 255#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
 256#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
 257#else
 258#define EXPORT_UNUSED_SYMBOL(sym)
 259#define EXPORT_UNUSED_SYMBOL_GPL(sym)
 260#endif
 261
 262#endif
 263
 264enum module_state
 265{
 266        MODULE_STATE_LIVE,
 267        MODULE_STATE_COMING,
 268        MODULE_STATE_GOING,
 269};
 270
 271struct module
 272{
 273        enum module_state state;
 274
 275        /* Member of list of modules */
 276        struct list_head list;
 277
 278        /* Unique handle for this module */
 279        char name[MODULE_NAME_LEN];
 280
 281        /* Sysfs stuff. */
 282        struct module_kobject mkobj;
 283        struct module_attribute *modinfo_attrs;
 284        const char *version;
 285        const char *srcversion;
 286        struct kobject *holders_dir;
 287
 288        /* Exported symbols */
 289        const struct kernel_symbol *syms;
 290        const unsigned long *crcs;
 291        unsigned int num_syms;
 292
 293        /* Kernel parameters. */
 294        struct kernel_param *kp;
 295        unsigned int num_kp;
 296
 297        /* GPL-only exported symbols. */
 298        unsigned int num_gpl_syms;
 299        const struct kernel_symbol *gpl_syms;
 300        const unsigned long *gpl_crcs;
 301
 302#ifdef CONFIG_UNUSED_SYMBOLS
 303        /* unused exported symbols. */
 304        const struct kernel_symbol *unused_syms;
 305        const unsigned long *unused_crcs;
 306        unsigned int num_unused_syms;
 307
 308        /* GPL-only, unused exported symbols. */
 309        unsigned int num_unused_gpl_syms;
 310        const struct kernel_symbol *unused_gpl_syms;
 311        const unsigned long *unused_gpl_crcs;
 312#endif
 313
 314        /* symbols that will be GPL-only in the near future. */
 315        const struct kernel_symbol *gpl_future_syms;
 316        const unsigned long *gpl_future_crcs;
 317        unsigned int num_gpl_future_syms;
 318
 319        /* Exception table */
 320        unsigned int num_exentries;
 321        struct exception_table_entry *extable;
 322
 323        /* Startup function. */
 324        int (*init)(void);
 325
 326        /* If this is non-NULL, vfree after init() returns */
 327        void *module_init;
 328
 329        /* Here is the actual code + data, vfree'd on unload. */
 330        void *module_core;
 331
 332        /* Here are the sizes of the init and core sections */
 333        unsigned int init_size, core_size;
 334
 335        /* The size of the executable code in each section.  */
 336        unsigned int init_text_size, core_text_size;
 337
 338        /* Size of RO sections of the module (text+rodata) */
 339        unsigned int init_ro_size, core_ro_size;
 340
 341        /* Arch-specific module values */
 342        struct mod_arch_specific arch;
 343
 344        unsigned int taints;    /* same bits as kernel:tainted */
 345
 346#ifdef CONFIG_GENERIC_BUG
 347        /* Support for BUG */
 348        unsigned num_bugs;
 349        struct list_head bug_list;
 350        struct bug_entry *bug_table;
 351#endif
 352
 353#ifdef CONFIG_KALLSYMS
 354        /*
 355         * We keep the symbol and string tables for kallsyms.
 356         * The core_* fields below are temporary, loader-only (they
 357         * could really be discarded after module init).
 358         */
 359        Elf_Sym *symtab, *core_symtab;
 360        unsigned int num_symtab, core_num_syms;
 361        char *strtab, *core_strtab;
 362
 363        /* Section attributes */
 364        struct module_sect_attrs *sect_attrs;
 365
 366        /* Notes attributes */
 367        struct module_notes_attrs *notes_attrs;
 368#endif
 369
 370#ifdef CONFIG_SMP
 371        /* Per-cpu data. */
 372        void __percpu *percpu;
 373        unsigned int percpu_size;
 374#endif
 375
 376        /* The command line arguments (may be mangled).  People like
 377           keeping pointers to this stuff */
 378        char *args;
 379#ifdef CONFIG_TRACEPOINTS
 380        struct tracepoint * const *tracepoints_ptrs;
 381        unsigned int num_tracepoints;
 382#endif
 383#ifdef HAVE_JUMP_LABEL
 384        struct jump_entry *jump_entries;
 385        unsigned int num_jump_entries;
 386#endif
 387#ifdef CONFIG_TRACING
 388        const char **trace_bprintk_fmt_start;
 389        unsigned int num_trace_bprintk_fmt;
 390#endif
 391#ifdef CONFIG_EVENT_TRACING
 392        struct ftrace_event_call **trace_events;
 393        unsigned int num_trace_events;
 394#endif
 395#ifdef CONFIG_FTRACE_MCOUNT_RECORD
 396        unsigned long *ftrace_callsites;
 397        unsigned int num_ftrace_callsites;
 398#endif
 399
 400#ifdef CONFIG_MODULE_UNLOAD
 401        /* What modules depend on me? */
 402        struct list_head source_list;
 403        /* What modules do I depend on? */
 404        struct list_head target_list;
 405
 406        /* Who is waiting for us to be unloaded */
 407        struct task_struct *waiter;
 408
 409        /* Destruction function. */
 410        void (*exit)(void);
 411
 412        struct module_ref {
 413                unsigned int incs;
 414                unsigned int decs;
 415        } __percpu *refptr;
 416#endif
 417
 418#ifdef CONFIG_CONSTRUCTORS
 419        /* Constructor functions. */
 420        ctor_fn_t *ctors;
 421        unsigned int num_ctors;
 422#endif
 423};
 424#ifndef MODULE_ARCH_INIT
 425#define MODULE_ARCH_INIT {}
 426#endif
 427
 428extern struct mutex module_mutex;
 429
 430/* FIXME: It'd be nice to isolate modules during init, too, so they
 431   aren't used before they (may) fail.  But presently too much code
 432   (IDE & SCSI) require entry into the module during init.*/
 433static inline int module_is_live(struct module *mod)
 434{
 435        return mod->state != MODULE_STATE_GOING;
 436}
 437
 438struct module *__module_text_address(unsigned long addr);
 439struct module *__module_address(unsigned long addr);
 440bool is_module_address(unsigned long addr);
 441bool is_module_percpu_address(unsigned long addr);
 442bool is_module_text_address(unsigned long addr);
 443
 444static inline int within_module_core(unsigned long addr, struct module *mod)
 445{
 446        return (unsigned long)mod->module_core <= addr &&
 447               addr < (unsigned long)mod->module_core + mod->core_size;
 448}
 449
 450static inline int within_module_init(unsigned long addr, struct module *mod)
 451{
 452        return (unsigned long)mod->module_init <= addr &&
 453               addr < (unsigned long)mod->module_init + mod->init_size;
 454}
 455
 456/* Search for module by name: must hold module_mutex. */
 457struct module *find_module(const char *name);
 458
 459struct symsearch {
 460        const struct kernel_symbol *start, *stop;
 461        const unsigned long *crcs;
 462        enum {
 463                NOT_GPL_ONLY,
 464                GPL_ONLY,
 465                WILL_BE_GPL_ONLY,
 466        } licence;
 467        bool unused;
 468};
 469
 470/* Search for an exported symbol by name. */
 471const struct kernel_symbol *find_symbol(const char *name,
 472                                        struct module **owner,
 473                                        const unsigned long **crc,
 474                                        bool gplok,
 475                                        bool warn);
 476
 477/* Walk the exported symbol table */
 478bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
 479                            unsigned int symnum, void *data), void *data);
 480
 481/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 482   symnum out of range. */
 483int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 484                        char *name, char *module_name, int *exported);
 485
 486/* Look for this name: can be of form module:name. */
 487unsigned long module_kallsyms_lookup_name(const char *name);
 488
 489int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 490                                             struct module *, unsigned long),
 491                                   void *data);
 492
 493extern void __module_put_and_exit(struct module *mod, long code)
 494        __attribute__((noreturn));
 495#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 496
 497#ifdef CONFIG_MODULE_UNLOAD
 498unsigned int module_refcount(struct module *mod);
 499void __symbol_put(const char *symbol);
 500#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 501void symbol_put_addr(void *addr);
 502
 503/* Sometimes we know we already have a refcount, and it's easier not
 504   to handle the error case (which only happens with rmmod --wait). */
 505static inline void __module_get(struct module *module)
 506{
 507        if (module) {
 508                preempt_disable();
 509                __this_cpu_inc(module->refptr->incs);
 510                trace_module_get(module, _THIS_IP_);
 511                preempt_enable();
 512        }
 513}
 514
 515static inline int try_module_get(struct module *module)
 516{
 517        int ret = 1;
 518
 519        if (module) {
 520                preempt_disable();
 521
 522                if (likely(module_is_live(module))) {
 523                        __this_cpu_inc(module->refptr->incs);
 524                        trace_module_get(module, _THIS_IP_);
 525                } else
 526                        ret = 0;
 527
 528                preempt_enable();
 529        }
 530        return ret;
 531}
 532
 533extern void module_put(struct module *module);
 534
 535#else /*!CONFIG_MODULE_UNLOAD*/
 536static inline int try_module_get(struct module *module)
 537{
 538        return !module || module_is_live(module);
 539}
 540static inline void module_put(struct module *module)
 541{
 542}
 543static inline void __module_get(struct module *module)
 544{
 545}
 546#define symbol_put(x) do { } while(0)
 547#define symbol_put_addr(p) do { } while(0)
 548
 549#endif /* CONFIG_MODULE_UNLOAD */
 550int ref_module(struct module *a, struct module *b);
 551
 552/* This is a #define so the string doesn't get put in every .o file */
 553#define module_name(mod)                        \
 554({                                              \
 555        struct module *__mod = (mod);           \
 556        __mod ? __mod->name : "kernel";         \
 557})
 558
 559/* For kallsyms to ask for address resolution.  namebuf should be at
 560 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 561 * found, otherwise NULL. */
 562const char *module_address_lookup(unsigned long addr,
 563                            unsigned long *symbolsize,
 564                            unsigned long *offset,
 565                            char **modname,
 566                            char *namebuf);
 567int lookup_module_symbol_name(unsigned long addr, char *symname);
 568int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 569
 570/* For extable.c to search modules' exception tables. */
 571const struct exception_table_entry *search_module_extables(unsigned long addr);
 572
 573int register_module_notifier(struct notifier_block * nb);
 574int unregister_module_notifier(struct notifier_block * nb);
 575
 576extern void print_modules(void);
 577
 578extern void module_update_tracepoints(void);
 579extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
 580
 581#else /* !CONFIG_MODULES... */
 582#define EXPORT_SYMBOL(sym)
 583#define EXPORT_SYMBOL_GPL(sym)
 584#define EXPORT_SYMBOL_GPL_FUTURE(sym)
 585#define EXPORT_UNUSED_SYMBOL(sym)
 586#define EXPORT_UNUSED_SYMBOL_GPL(sym)
 587
 588/* Given an address, look for it in the exception tables. */
 589static inline const struct exception_table_entry *
 590search_module_extables(unsigned long addr)
 591{
 592        return NULL;
 593}
 594
 595static inline struct module *__module_address(unsigned long addr)
 596{
 597        return NULL;
 598}
 599
 600static inline struct module *__module_text_address(unsigned long addr)
 601{
 602        return NULL;
 603}
 604
 605static inline bool is_module_address(unsigned long addr)
 606{
 607        return false;
 608}
 609
 610static inline bool is_module_percpu_address(unsigned long addr)
 611{
 612        return false;
 613}
 614
 615static inline bool is_module_text_address(unsigned long addr)
 616{
 617        return false;
 618}
 619
 620/* Get/put a kernel symbol (calls should be symmetric) */
 621#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 622#define symbol_put(x) do { } while(0)
 623#define symbol_put_addr(x) do { } while(0)
 624
 625static inline void __module_get(struct module *module)
 626{
 627}
 628
 629static inline int try_module_get(struct module *module)
 630{
 631        return 1;
 632}
 633
 634static inline void module_put(struct module *module)
 635{
 636}
 637
 638#define module_name(mod) "kernel"
 639
 640/* For kallsyms to ask for address resolution.  NULL means not found. */
 641static inline const char *module_address_lookup(unsigned long addr,
 642                                          unsigned long *symbolsize,
 643                                          unsigned long *offset,
 644                                          char **modname,
 645                                          char *namebuf)
 646{
 647        return NULL;
 648}
 649
 650static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
 651{
 652        return -ERANGE;
 653}
 654
 655static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
 656{
 657        return -ERANGE;
 658}
 659
 660static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
 661                                        char *type, char *name,
 662                                        char *module_name, int *exported)
 663{
 664        return -ERANGE;
 665}
 666
 667static inline unsigned long module_kallsyms_lookup_name(const char *name)
 668{
 669        return 0;
 670}
 671
 672static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 673                                                           struct module *,
 674                                                           unsigned long),
 675                                                 void *data)
 676{
 677        return 0;
 678}
 679
 680static inline int register_module_notifier(struct notifier_block * nb)
 681{
 682        /* no events will happen anyway, so this can always succeed */
 683        return 0;
 684}
 685
 686static inline int unregister_module_notifier(struct notifier_block * nb)
 687{
 688        return 0;
 689}
 690
 691#define module_put_and_exit(code) do_exit(code)
 692
 693static inline void print_modules(void)
 694{
 695}
 696
 697static inline void module_update_tracepoints(void)
 698{
 699}
 700
 701static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
 702{
 703        return 0;
 704}
 705#endif /* CONFIG_MODULES */
 706
 707#ifdef CONFIG_SYSFS
 708extern struct kset *module_kset;
 709extern struct kobj_type module_ktype;
 710extern int module_sysfs_initialized;
 711#endif /* CONFIG_SYSFS */
 712
 713#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 714
 715/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 716
 717#define __MODULE_STRING(x) __stringify(x)
 718
 719#ifdef CONFIG_DEBUG_SET_MODULE_RONX
 720extern void set_all_modules_text_rw(void);
 721extern void set_all_modules_text_ro(void);
 722#else
 723static inline void set_all_modules_text_rw(void) { }
 724static inline void set_all_modules_text_ro(void) { }
 725#endif
 726
 727#ifdef CONFIG_GENERIC_BUG
 728void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 729                         struct module *);
 730void module_bug_cleanup(struct module *);
 731
 732#else   /* !CONFIG_GENERIC_BUG */
 733
 734static inline void module_bug_finalize(const Elf_Ehdr *hdr,
 735                                        const Elf_Shdr *sechdrs,
 736                                        struct module *mod)
 737{
 738}
 739static inline void module_bug_cleanup(struct module *mod) {}
 740#endif  /* CONFIG_GENERIC_BUG */
 741
 742#endif /* _LINUX_MODULE_H */
 743