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