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_kobject {
  52         struct kobject kobj;
  53         struct module *mod;
  54         struct kobject *drivers_dir;
  55         struct module_param_attrs *mp;
  56 };
  57
  58 struct module_attribute {
  59         struct attribute attr;
  60         ssize_t (*show)(struct module_attribute *, struct module_kobject *,
  61                         char *);
  62         ssize_t (*store)(struct module_attribute *, struct module_kobject *,
  63                          const char *, size_t count);
  64         void (*setup)(struct module *, const char *);
  65         int (*test)(struct module *);
  66         void (*free)(struct module *);
  67 };
  68
  69 struct module_version_attribute {
  70         struct module_attribute mattr;
  71         const char *module_name;
  72         const char *version;
  73 } __attribute__ ((__aligned__(sizeof(void *))));
  74
  75 extern ssize_t __modver_version_show(struct module_attribute *,
  76                                      struct module_kobject *, char *);
  77
  78 extern struct module_attribute module_uevent;
  79
  80 /* These are either module local, or the kernel's dummy ones. */
  81 extern int init_module(void);
  82 extern void cleanup_module(void);
  83
  84 /* Archs provide a method of finding the correct exception table. */
  85 struct exception_table_entry;
  86
  87 const struct exception_table_entry *
  88 search_extable(const struct exception_table_entry *first,
  89                const struct exception_table_entry *last,
  90                unsigned long value);
  91 void sort_extable(struct exception_table_entry *start,
  92                   struct exception_table_entry *finish);
  93 void sort_main_extable(void);
  94 void trim_init_extable(struct module *m);
  95
  96 #ifdef MODULE
  97 #define MODULE_GENERIC_TABLE(gtype,name)                        \
  98 extern const struct gtype##_id __mod_##gtype##_table            \
  99   __attribute__ ((unused, alias(__stringify(name))))
 100
 101 extern struct module __this_module;
 102 #define THIS_MODULE (&__this_module)
 103 #else  /* !MODULE */
 104 #define MODULE_GENERIC_TABLE(gtype,name)
 105 #define THIS_MODULE ((struct module *)0)
 106 #endif
 107
 108 /* Generic info of form tag = "info" */
 109 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
 110
 111 /* For userspace: you can also call me... */
 112 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
 113
 114 /*
 115  * The following license idents are currently accepted as indicating free
 116  * software modules
 117  *
 118  *      "GPL"                           [GNU Public License v2 or later]
 119  *      "GPL v2"                        [GNU Public License v2]
 120  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 121  *      "Dual BSD/GPL"                  [GNU Public License v2
 122  *                                       or BSD license choice]
 123  *      "Dual MIT/GPL"                  [GNU Public License v2
 124  *                                       or MIT license choice]
 125  *      "Dual MPL/GPL"                  [GNU Public License v2
 126  *                                       or Mozilla license choice]
 127  *
 128  * The following other idents are available
 129  *
 130  *      "Proprietary"                   [Non free products]
 131  *
 132  * There are dual licensed components, but when running with Linux it is the
 133  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 134  * is a GPL combined work.
 135  *
 136  * This exists for several reasons
 137  * 1.   So modinfo can show license info for users wanting to vet their setup
 138  *      is free
 139  * 2.   So the community can ignore bug reports including proprietary modules
 140  * 3.   So vendors can do likewise based on their own policies
 141  */
 142 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 143
 144 /*
 145  * Author(s), use "Name <email>" or just "Name", for multiple
 146  * authors use multiple MODULE_AUTHOR() statements/lines.
 147  */
 148 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
 149
 150 /* What your module does. */
 151 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 152
 153 /* One for each parameter, describing how to use it.  Some files do
 154    multiple of these per line, so can't just use MODULE_INFO. */
 155 #define MODULE_PARM_DESC(_parm, desc) \
 156         __MODULE_INFO(parm, _parm, #_parm ":" desc)
 157
 158 #define MODULE_DEVICE_TABLE(type,name)          \
 159   MODULE_GENERIC_TABLE(type##_device,name)
 160
 161 /* Version of form [<epoch>:]<version>[-<extra-version>].
 162    Or for CVS/RCS ID version, everything but the number is stripped.
 163   <epoch>: A (small) unsigned integer which allows you to start versions
 164            anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 165            "1:2.0".
 166   <version>: The <version> may contain only alphanumerics and the
 167            character `.'.  Ordered by numeric sort for numeric parts,
 168            ascii sort for ascii parts (as per RPM or DEB algorithm).
 169   <extraversion>: Like <version>, but inserted for local
 170            customizations, eg "rh3" or "rusty1".
 171
 172   Using this automatically adds a checksum of the .c files and the
 173   local headers in "srcversion".
 174 */
 175
 176 #if defined(MODULE) || !defined(CONFIG_SYSFS)
 177 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 178 #else
 179 #define MODULE_VERSION(_version)                                        \
 180         static struct module_version_attribute ___modver_attr = {       \
 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         static const struct module_version_attribute                    \
 192         __used __attribute__ ((__section__ ("__modver")))               \
 193         * __moduleparam_const __modver_attr = &___modver_attr
 194 #endif
 195
 196 /* Optional firmware file (or files) needed by the module
 197  * format is simply firmware file name.  Multiple firmware
 198  * files require multiple MODULE_FIRMWARE() specifiers */
 199 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 200
 201 /* Given an address, look for it in the exception tables */
 202 const struct exception_table_entry *search_exception_tables(unsigned long add);
 203
 204 struct notifier_block;
 205
 206 #ifdef CONFIG_MODULES
 207
 208 extern int modules_disabled; /* for sysctl */
 209 /* Get/put a kernel symbol (calls must be symmetric) */
 210 void *__symbol_get(const char *symbol);
 211 void *__symbol_get_gpl(const char *symbol);
 212 #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
 213
 214 /* modules using other modules: kdb wants to see this. */
 215 struct module_use {
 216         struct list_head source_list;
 217         struct list_head target_list;
 218         struct module *source, *target;
 219 };
 220
 221 #ifndef __GENKSYMS__
 222 #ifdef CONFIG_MODVERSIONS
 223 /* Mark the CRC weak since genksyms apparently decides not to
 224  * generate a checksums for some symbols */
 225 #define __CRC_SYMBOL(sym, sec)                                  \
 226         extern void *__crc_##sym __attribute__((weak));         \
 227         static const unsigned long __kcrctab_##sym              \
 228         __used                                                  \
 229         __attribute__((section("___kcrctab" sec "+" #sym), unused))     \
 230         = (unsigned long) &__crc_##sym;
 231 #else
 232 #define __CRC_SYMBOL(sym, sec)
 233 #endif
 234
 235 /* For every exported symbol, place a struct in the __ksymtab section */
 236 #define __EXPORT_SYMBOL(sym, sec)                               \
 237         extern typeof(sym) sym;                                 \
 238         __CRC_SYMBOL(sym, sec)                                  \
 239         static const char __kstrtab_##sym[]                     \
 240         __attribute__((section("__ksymtab_strings"), aligned(1))) \
 241         = MODULE_SYMBOL_PREFIX #sym;                            \
 242         static const struct kernel_symbol __ksymtab_##sym       \
 243         __used                                                  \
 244         __attribute__((section("___ksymtab" sec "+" #sym), unused))     \
 245         = { (unsigned long)&sym, __kstrtab_##sym }
 246
 247 #define EXPORT_SYMBOL(sym)                                      \
 248         __EXPORT_SYMBOL(sym, "")
 249
 250 #define EXPORT_SYMBOL_GPL(sym)                                  \
 251         __EXPORT_SYMBOL(sym, "_gpl")
 252
 253 #define EXPORT_SYMBOL_GPL_FUTURE(sym)                           \
 254         __EXPORT_SYMBOL(sym, "_gpl_future")
 255
 256
 257 #ifdef CONFIG_UNUSED_SYMBOLS
 258 #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
 259 #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
 260 #else
 261 #define EXPORT_UNUSED_SYMBOL(sym)
 262 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 263 #endif
 264
 265 #endif
 266
 267 enum module_state
 268 {
 269         MODULE_STATE_LIVE,
 270         MODULE_STATE_COMING,
 271         MODULE_STATE_GOING,
 272 };
 273
 274 struct module
 275 {
 276         enum module_state state;
 277
 278         /* Member of list of modules */
 279         struct list_head list;
 280
 281         /* Unique handle for this module */
 282         char name[MODULE_NAME_LEN];
 283
 284         /* Sysfs stuff. */
 285         struct module_kobject mkobj;
 286         struct module_attribute *modinfo_attrs;
 287         const char *version;
 288         const char *srcversion;
 289         struct kobject *holders_dir;
 290
 291         /* Exported symbols */
 292         const struct kernel_symbol *syms;
 293         const unsigned long *crcs;
 294         unsigned int num_syms;
 295
 296         /* Kernel parameters. */
 297         struct kernel_param *kp;
 298         unsigned int num_kp;
 299
 300         /* GPL-only exported symbols. */
 301         unsigned int num_gpl_syms;
 302         const struct kernel_symbol *gpl_syms;
 303         const unsigned long *gpl_crcs;
 304
 305 #ifdef CONFIG_UNUSED_SYMBOLS
 306         /* unused exported symbols. */
 307         const struct kernel_symbol *unused_syms;
 308         const unsigned long *unused_crcs;
 309         unsigned int num_unused_syms;
 310
 311         /* GPL-only, unused exported symbols. */
 312         unsigned int num_unused_gpl_syms;
 313         const struct kernel_symbol *unused_gpl_syms;
 314         const unsigned long *unused_gpl_crcs;
 315 #endif
 316
 317         /* symbols that will be GPL-only in the near future. */
 318         const struct kernel_symbol *gpl_future_syms;
 319         const unsigned long *gpl_future_crcs;
 320         unsigned int num_gpl_future_syms;
 321
 322         /* Exception table */
 323         unsigned int num_exentries;
 324         struct exception_table_entry *extable;
 325
 326         /* Startup function. */
 327         int (*init)(void);
 328
 329         /* If this is non-NULL, vfree after init() returns */
 330         void *module_init;
 331
 332         /* Here is the actual code + data, vfree'd on unload. */
 333         void *module_core;
 334
 335         /* Here are the sizes of the init and core sections */
 336         unsigned int init_size, core_size;
 337
 338         /* The size of the executable code in each section.  */
 339         unsigned int init_text_size, core_text_size;
 340
 341         /* Size of RO sections of the module (text+rodata) */
 342         unsigned int init_ro_size, core_ro_size;
 343
 344         /* Arch-specific module values */
 345         struct mod_arch_specific arch;
 346
 347         unsigned int taints;    /* same bits as kernel:tainted */
 348
 349 #ifdef CONFIG_GENERIC_BUG
 350         /* Support for BUG */
 351         unsigned num_bugs;
 352         struct list_head bug_list;
 353         struct bug_entry *bug_table;
 354 #endif
 355
 356 #ifdef CONFIG_KALLSYMS
 357         /*
 358          * We keep the symbol and string tables for kallsyms.
 359          * The core_* fields below are temporary, loader-only (they
 360          * could really be discarded after module init).
 361          */
 362         Elf_Sym *symtab, *core_symtab;
 363         unsigned int num_symtab, core_num_syms;
 364         char *strtab, *core_strtab;
 365
 366         /* Section attributes */
 367         struct module_sect_attrs *sect_attrs;
 368
 369         /* Notes attributes */
 370         struct module_notes_attrs *notes_attrs;
 371 #endif
 372
 373         /* The command line arguments (may be mangled).  People like
 374            keeping pointers to this stuff */
 375         char *args;
 376
 377 #ifdef CONFIG_SMP
 378         /* Per-cpu data. */
 379         void __percpu *percpu;
 380         unsigned int percpu_size;
 381 #endif
 382
 383 #ifdef CONFIG_TRACEPOINTS
 384         unsigned int num_tracepoints;
 385         struct tracepoint * const *tracepoints_ptrs;
 386 #endif
 387 #ifdef HAVE_JUMP_LABEL
 388         struct jump_entry *jump_entries;
 389         unsigned int num_jump_entries;
 390 #endif
 391 #ifdef CONFIG_TRACING
 392         unsigned int num_trace_bprintk_fmt;
 393         const char **trace_bprintk_fmt_start;
 394 #endif
 395 #ifdef CONFIG_EVENT_TRACING
 396         struct ftrace_event_call **trace_events;
 397         unsigned int num_trace_events;
 398 #endif
 399 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 400         unsigned int num_ftrace_callsites;
 401         unsigned long *ftrace_callsites;
 402 #endif
 403
 404 #ifdef CONFIG_MODULE_UNLOAD
 405         /* What modules depend on me? */
 406         struct list_head source_list;
 407         /* What modules do I depend on? */
 408         struct list_head target_list;
 409
 410         /* Who is waiting for us to be unloaded */
 411         struct task_struct *waiter;
 412
 413         /* Destruction function. */
 414         void (*exit)(void);
 415
 416         struct module_ref {
 417                 unsigned int incs;
 418                 unsigned int decs;
 419         } __percpu *refptr;
 420 #endif
 421
 422 #ifdef CONFIG_CONSTRUCTORS
 423         /* Constructor functions. */
 424         ctor_fn_t *ctors;
 425         unsigned int num_ctors;
 426 #endif
 427 };
 428 #ifndef MODULE_ARCH_INIT
 429 #define MODULE_ARCH_INIT {}
 430 #endif
 431
 432 extern struct mutex module_mutex;
 433
 434 /* FIXME: It'd be nice to isolate modules during init, too, so they
 435    aren't used before they (may) fail.  But presently too much code
 436    (IDE & SCSI) require entry into the module during init.*/
 437 static inline int module_is_live(struct module *mod)
 438 {
 439         return mod->state != MODULE_STATE_GOING;
 440 }
 441
 442 struct module *__module_text_address(unsigned long addr);
 443 struct module *__module_address(unsigned long addr);
 444 bool is_module_address(unsigned long addr);
 445 bool is_module_percpu_address(unsigned long addr);
 446 bool is_module_text_address(unsigned long addr);
 447
 448 static inline int within_module_core(unsigned long addr, struct module *mod)
 449 {
 450         return (unsigned long)mod->module_core <= addr &&
 451                addr < (unsigned long)mod->module_core + mod->core_size;
 452 }
 453
 454 static inline int within_module_init(unsigned long addr, struct module *mod)
 455 {
 456         return (unsigned long)mod->module_init <= addr &&
 457                addr < (unsigned long)mod->module_init + mod->init_size;
 458 }
 459
 460 /* Search for module by name: must hold module_mutex. */
 461 struct module *find_module(const char *name);
 462
 463 struct symsearch {
 464         const struct kernel_symbol *start, *stop;
 465         const unsigned long *crcs;
 466         enum {
 467                 NOT_GPL_ONLY,
 468                 GPL_ONLY,
 469                 WILL_BE_GPL_ONLY,
 470         } licence;
 471         bool unused;
 472 };
 473
 474 /* Search for an exported symbol by name. */
 475 const struct kernel_symbol *find_symbol(const char *name,
 476                                         struct module **owner,
 477                                         const unsigned long **crc,
 478                                         bool gplok,
 479                                         bool warn);
 480
 481 /* Walk the exported symbol table */
 482 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
 483                                     struct module *owner,
 484                                     void *data), void *data);
 485
 486 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 487    symnum out of range. */
 488 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 489                         char *name, char *module_name, int *exported);
 490
 491 /* Look for this name: can be of form module:name. */
 492 unsigned long module_kallsyms_lookup_name(const char *name);
 493
 494 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 495                                              struct module *, unsigned long),
 496                                    void *data);
 497
 498 extern void __module_put_and_exit(struct module *mod, long code)
 499         __attribute__((noreturn));
 500 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 501
 502 #ifdef CONFIG_MODULE_UNLOAD
 503 unsigned int module_refcount(struct module *mod);
 504 void __symbol_put(const char *symbol);
 505 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 506 void symbol_put_addr(void *addr);
 507
 508 /* Sometimes we know we already have a refcount, and it's easier not
 509    to handle the error case (which only happens with rmmod --wait). */
 510 static inline void __module_get(struct module *module)
 511 {
 512         if (module) {
 513                 preempt_disable();
 514                 __this_cpu_inc(module->refptr->incs);
 515                 trace_module_get(module, _THIS_IP_);
 516                 preempt_enable();
 517         }
 518 }
 519
 520 static inline int try_module_get(struct module *module)
 521 {
 522         int ret = 1;
 523
 524         if (module) {
 525                 preempt_disable();
 526
 527                 if (likely(module_is_live(module))) {
 528                         __this_cpu_inc(module->refptr->incs);
 529                         trace_module_get(module, _THIS_IP_);
 530                 } else
 531                         ret = 0;
 532
 533                 preempt_enable();
 534         }
 535         return ret;
 536 }
 537
 538 extern void module_put(struct module *module);
 539
 540 #else /*!CONFIG_MODULE_UNLOAD*/
 541 static inline int try_module_get(struct module *module)
 542 {
 543         return !module || module_is_live(module);
 544 }
 545 static inline void module_put(struct module *module)
 546 {
 547 }
 548 static inline void __module_get(struct module *module)
 549 {
 550 }
 551 #define symbol_put(x) do { } while(0)
 552 #define symbol_put_addr(p) do { } while(0)
 553
 554 #endif /* CONFIG_MODULE_UNLOAD */
 555 int ref_module(struct module *a, struct module *b);
 556
 557 /* This is a #define so the string doesn't get put in every .o file */
 558 #define module_name(mod)                        \
 559 ({                                              \
 560         struct module *__mod = (mod);           \
 561         __mod ? __mod->name : "kernel";         \
 562 })
 563
 564 /* For kallsyms to ask for address resolution.  namebuf should be at
 565  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 566  * found, otherwise NULL. */
 567 const char *module_address_lookup(unsigned long addr,
 568                             unsigned long *symbolsize,
 569                             unsigned long *offset,
 570                             char **modname,
 571                             char *namebuf);
 572 int lookup_module_symbol_name(unsigned long addr, char *symname);
 573 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 574
 575 /* For extable.c to search modules' exception tables. */
 576 const struct exception_table_entry *search_module_extables(unsigned long addr);
 577
 578 int register_module_notifier(struct notifier_block * nb);
 579 int unregister_module_notifier(struct notifier_block * nb);
 580
 581 extern void print_modules(void);
 582
 583 #else /* !CONFIG_MODULES... */
 584 #define EXPORT_SYMBOL(sym)
 585 #define EXPORT_SYMBOL_GPL(sym)
 586 #define EXPORT_SYMBOL_GPL_FUTURE(sym)
 587 #define EXPORT_UNUSED_SYMBOL(sym)
 588 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 589
 590 /* Given an address, look for it in the exception tables. */
 591 static inline const struct exception_table_entry *
 592 search_module_extables(unsigned long addr)
 593 {
 594         return NULL;
 595 }
 596
 597 static inline struct module *__module_address(unsigned long addr)
 598 {
 599         return NULL;
 600 }
 601
 602 static inline struct module *__module_text_address(unsigned long addr)
 603 {
 604         return NULL;
 605 }
 606
 607 static inline bool is_module_address(unsigned long addr)
 608 {
 609         return false;
 610 }
 611
 612 static inline bool is_module_percpu_address(unsigned long addr)
 613 {
 614         return false;
 615 }
 616
 617 static inline bool is_module_text_address(unsigned long addr)
 618 {
 619         return false;
 620 }
 621
 622 /* Get/put a kernel symbol (calls should be symmetric) */
 623 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 624 #define symbol_put(x) do { } while(0)
 625 #define symbol_put_addr(x) do { } while(0)
 626
 627 static inline void __module_get(struct module *module)
 628 {
 629 }
 630
 631 static inline int try_module_get(struct module *module)
 632 {
 633         return 1;
 634 }
 635
 636 static inline void module_put(struct module *module)
 637 {
 638 }
 639
 640 #define module_name(mod) "kernel"
 641
 642 /* For kallsyms to ask for address resolution.  NULL means not found. */
 643 static inline const char *module_address_lookup(unsigned long addr,
 644                                           unsigned long *symbolsize,
 645                                           unsigned long *offset,
 646                                           char **modname,
 647                                           char *namebuf)
 648 {
 649         return NULL;
 650 }
 651
 652 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
 653 {
 654         return -ERANGE;
 655 }
 656
 657 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
 658 {
 659         return -ERANGE;
 660 }
 661
 662 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
 663                                         char *type, char *name,
 664                                         char *module_name, int *exported)
 665 {
 666         return -ERANGE;
 667 }
 668
 669 static inline unsigned long module_kallsyms_lookup_name(const char *name)
 670 {
 671         return 0;
 672 }
 673
 674 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 675                                                            struct module *,
 676                                                            unsigned long),
 677                                                  void *data)
 678 {
 679         return 0;
 680 }
 681
 682 static inline int register_module_notifier(struct notifier_block * nb)
 683 {
 684         /* no events will happen anyway, so this can always succeed */
 685         return 0;
 686 }
 687
 688 static inline int unregister_module_notifier(struct notifier_block * nb)
 689 {
 690         return 0;
 691 }
 692
 693 #define module_put_and_exit(code) do_exit(code)
 694
 695 static inline void print_modules(void)
 696 {
 697 }
 698 #endif /* CONFIG_MODULES */
 699
 700 #ifdef CONFIG_SYSFS
 701 extern struct kset *module_kset;
 702 extern struct kobj_type module_ktype;
 703 extern int module_sysfs_initialized;
 704 #endif /* CONFIG_SYSFS */
 705
 706 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 707
 708 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 709
 710 #define __MODULE_STRING(x) __stringify(x)
 711
 712 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
 713 extern void set_all_modules_text_rw(void);
 714 extern void set_all_modules_text_ro(void);
 715 #else
 716 static inline void set_all_modules_text_rw(void) { }
 717 static inline void set_all_modules_text_ro(void) { }
 718 #endif
 719
 720 #ifdef CONFIG_GENERIC_BUG
 721 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 722                          struct module *);
 723 void module_bug_cleanup(struct module *);
 724
 725 #else   /* !CONFIG_GENERIC_BUG */
 726
 727 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
 728                                         const Elf_Shdr *sechdrs,
 729                                         struct module *mod)
 730 {
 731 }
 732 static inline void module_bug_cleanup(struct module *mod) {}
 733 #endif  /* CONFIG_GENERIC_BUG */
 734
 735 #endif /* _LINUX_MODULE_H */