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 <asm/local.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 uses a `_' prefix for all user symbols */
  29 #ifndef MODULE_SYMBOL_PREFIX
  30 #define MODULE_SYMBOL_PREFIX ""
  31 #endif
  32
  33 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
  34
  35 struct kernel_symbol
  36 {
  37         unsigned long value;
  38         const char *name;
  39 };
  40
  41 struct modversion_info
  42 {
  43         unsigned long crc;
  44         char name[MODULE_NAME_LEN];
  45 };
  46
  47 struct module;
  48
  49 struct module_attribute {
  50         struct attribute attr;
  51         ssize_t (*show)(struct module_attribute *, struct module *, char *);
  52         ssize_t (*store)(struct module_attribute *, struct module *,
  53                          const char *, size_t count);
  54         void (*setup)(struct module *, const char *);
  55         int (*test)(struct module *);
  56         void (*free)(struct module *);
  57 };
  58
  59 struct module_kobject
  60 {
  61         struct kobject kobj;
  62         struct module *mod;
  63         struct kobject *drivers_dir;
  64         struct module_param_attrs *mp;
  65 };
  66
  67 /* These are either module local, or the kernel's dummy ones. */
  68 extern int init_module(void);
  69 extern void cleanup_module(void);
  70
  71 /* Archs provide a method of finding the correct exception table. */
  72 struct exception_table_entry;
  73
  74 const struct exception_table_entry *
  75 search_extable(const struct exception_table_entry *first,
  76                const struct exception_table_entry *last,
  77                unsigned long value);
  78 void sort_extable(struct exception_table_entry *start,
  79                   struct exception_table_entry *finish);
  80 void sort_main_extable(void);
  81 void trim_init_extable(struct module *m);
  82
  83 #ifdef MODULE
  84 #define MODULE_GENERIC_TABLE(gtype,name)                        \
  85 extern const struct gtype##_id __mod_##gtype##_table            \
  86   __attribute__ ((unused, alias(__stringify(name))))
  87
  88 extern struct module __this_module;
  89 #define THIS_MODULE (&__this_module)
  90 #else  /* !MODULE */
  91 #define MODULE_GENERIC_TABLE(gtype,name)
  92 #define THIS_MODULE ((struct module *)0)
  93 #endif
  94
  95 /* Generic info of form tag = "info" */
  96 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
  97
  98 /* For userspace: you can also call me... */
  99 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
 100
 101 /*
 102  * The following license idents are currently accepted as indicating free
 103  * software modules
 104  *
 105  *      "GPL"                           [GNU Public License v2 or later]
 106  *      "GPL v2"                        [GNU Public License v2]
 107  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 108  *      "Dual BSD/GPL"                  [GNU Public License v2
 109  *                                       or BSD license choice]
 110  *      "Dual MIT/GPL"                  [GNU Public License v2
 111  *                                       or MIT license choice]
 112  *      "Dual MPL/GPL"                  [GNU Public License v2
 113  *                                       or Mozilla license choice]
 114  *
 115  * The following other idents are available
 116  *
 117  *      "Proprietary"                   [Non free products]
 118  *
 119  * There are dual licensed components, but when running with Linux it is the
 120  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 121  * is a GPL combined work.
 122  *
 123  * This exists for several reasons
 124  * 1.   So modinfo can show license info for users wanting to vet their setup
 125  *      is free
 126  * 2.   So the community can ignore bug reports including proprietary modules
 127  * 3.   So vendors can do likewise based on their own policies
 128  */
 129 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 130
 131 /*
 132  * Author(s), use "Name <email>" or just "Name", for multiple
 133  * authors use multiple MODULE_AUTHOR() statements/lines.
 134  */
 135 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
 136
 137 /* What your module does. */
 138 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 139
 140 /* One for each parameter, describing how to use it.  Some files do
 141    multiple of these per line, so can't just use MODULE_INFO. */
 142 #define MODULE_PARM_DESC(_parm, desc) \
 143         __MODULE_INFO(parm, _parm, #_parm ":" desc)
 144
 145 #define MODULE_DEVICE_TABLE(type,name)          \
 146   MODULE_GENERIC_TABLE(type##_device,name)
 147
 148 /* Version of form [<epoch>:]<version>[-<extra-version>].
 149    Or for CVS/RCS ID version, everything but the number is stripped.
 150   <epoch>: A (small) unsigned integer which allows you to start versions
 151            anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 152            "1:2.0".
 153   <version>: The <version> may contain only alphanumerics and the
 154            character `.'.  Ordered by numeric sort for numeric parts,
 155            ascii sort for ascii parts (as per RPM or DEB algorithm).
 156   <extraversion>: Like <version>, but inserted for local
 157            customizations, eg "rh3" or "rusty1".
 158
 159   Using this automatically adds a checksum of the .c files and the
 160   local headers in "srcversion".
 161 */
 162 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 163
 164 /* Optional firmware file (or files) needed by the module
 165  * format is simply firmware file name.  Multiple firmware
 166  * files require multiple MODULE_FIRMWARE() specifiers */
 167 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 168
 169 /* Given an address, look for it in the exception tables */
 170 const struct exception_table_entry *search_exception_tables(unsigned long add);
 171
 172 struct notifier_block;
 173
 174 #ifdef CONFIG_MODULES
 175
 176 /* Get/put a kernel symbol (calls must be symmetric) */
 177 void *__symbol_get(const char *symbol);
 178 void *__symbol_get_gpl(const char *symbol);
 179 #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
 180
 181 #ifndef __GENKSYMS__
 182 #ifdef CONFIG_MODVERSIONS
 183 /* Mark the CRC weak since genksyms apparently decides not to
 184  * generate a checksums for some symbols */
 185 #define __CRC_SYMBOL(sym, sec)                                  \
 186         extern void *__crc_##sym __attribute__((weak));         \
 187         static const unsigned long __kcrctab_##sym              \
 188         __used                                                  \
 189         __attribute__((section("__kcrctab" sec), unused))       \
 190         = (unsigned long) &__crc_##sym;
 191 #else
 192 #define __CRC_SYMBOL(sym, sec)
 193 #endif
 194
 195 /* For every exported symbol, place a struct in the __ksymtab section */
 196 #define __EXPORT_SYMBOL(sym, sec)                               \
 197         extern typeof(sym) sym;                                 \
 198         __CRC_SYMBOL(sym, sec)                                  \
 199         static const char __kstrtab_##sym[]                     \
 200         __attribute__((section("__ksymtab_strings"), aligned(1))) \
 201         = MODULE_SYMBOL_PREFIX #sym;                            \
 202         static const struct kernel_symbol __ksymtab_##sym       \
 203         __used                                                  \
 204         __attribute__((section("__ksymtab" sec), unused))       \
 205         = { (unsigned long)&sym, __kstrtab_##sym }
 206
 207 #define EXPORT_SYMBOL(sym)                                      \
 208         __EXPORT_SYMBOL(sym, "")
 209
 210 #define EXPORT_SYMBOL_GPL(sym)                                  \
 211         __EXPORT_SYMBOL(sym, "_gpl")
 212
 213 #define EXPORT_SYMBOL_GPL_FUTURE(sym)                           \
 214         __EXPORT_SYMBOL(sym, "_gpl_future")
 215
 216
 217 #ifdef CONFIG_UNUSED_SYMBOLS
 218 #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
 219 #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
 220 #else
 221 #define EXPORT_UNUSED_SYMBOL(sym)
 222 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 223 #endif
 224
 225 #endif
 226
 227 enum module_state
 228 {
 229         MODULE_STATE_LIVE,
 230         MODULE_STATE_COMING,
 231         MODULE_STATE_GOING,
 232 };
 233
 234 struct module
 235 {
 236         enum module_state state;
 237
 238         /* Member of list of modules */
 239         struct list_head list;
 240
 241         /* Unique handle for this module */
 242         char name[MODULE_NAME_LEN];
 243
 244         /* Sysfs stuff. */
 245         struct module_kobject mkobj;
 246         struct module_attribute *modinfo_attrs;
 247         const char *version;
 248         const char *srcversion;
 249         struct kobject *holders_dir;
 250
 251         /* Exported symbols */
 252         const struct kernel_symbol *syms;
 253         const unsigned long *crcs;
 254         unsigned int num_syms;
 255
 256         /* Kernel parameters. */
 257         struct kernel_param *kp;
 258         unsigned int num_kp;
 259
 260         /* GPL-only exported symbols. */
 261         unsigned int num_gpl_syms;
 262         const struct kernel_symbol *gpl_syms;
 263         const unsigned long *gpl_crcs;
 264
 265 #ifdef CONFIG_UNUSED_SYMBOLS
 266         /* unused exported symbols. */
 267         const struct kernel_symbol *unused_syms;
 268         const unsigned long *unused_crcs;
 269         unsigned int num_unused_syms;
 270
 271         /* GPL-only, unused exported symbols. */
 272         unsigned int num_unused_gpl_syms;
 273         const struct kernel_symbol *unused_gpl_syms;
 274         const unsigned long *unused_gpl_crcs;
 275 #endif
 276
 277         /* symbols that will be GPL-only in the near future. */
 278         const struct kernel_symbol *gpl_future_syms;
 279         const unsigned long *gpl_future_crcs;
 280         unsigned int num_gpl_future_syms;
 281
 282         /* Exception table */
 283         unsigned int num_exentries;
 284         struct exception_table_entry *extable;
 285
 286         /* Startup function. */
 287         int (*init)(void);
 288
 289         /* If this is non-NULL, vfree after init() returns */
 290         void *module_init;
 291
 292         /* Here is the actual code + data, vfree'd on unload. */
 293         void *module_core;
 294
 295         /* Here are the sizes of the init and core sections */
 296         unsigned int init_size, core_size;
 297
 298         /* The size of the executable code in each section.  */
 299         unsigned int init_text_size, core_text_size;
 300
 301         /* Arch-specific module values */
 302         struct mod_arch_specific arch;
 303
 304         unsigned int taints;    /* same bits as kernel:tainted */
 305
 306 #ifdef CONFIG_GENERIC_BUG
 307         /* Support for BUG */
 308         unsigned num_bugs;
 309         struct list_head bug_list;
 310         struct bug_entry *bug_table;
 311 #endif
 312
 313 #ifdef CONFIG_KALLSYMS
 314         /*
 315          * We keep the symbol and string tables for kallsyms.
 316          * The core_* fields below are temporary, loader-only (they
 317          * could really be discarded after module init).
 318          */
 319         Elf_Sym *symtab, *core_symtab;
 320         unsigned int num_symtab, core_num_syms;
 321         char *strtab, *core_strtab;
 322
 323         /* Section attributes */
 324         struct module_sect_attrs *sect_attrs;
 325
 326         /* Notes attributes */
 327         struct module_notes_attrs *notes_attrs;
 328 #endif
 329
 330         /* Per-cpu data. */
 331         void *percpu;
 332
 333         /* The command line arguments (may be mangled).  People like
 334            keeping pointers to this stuff */
 335         char *args;
 336 #ifdef CONFIG_TRACEPOINTS
 337         struct tracepoint *tracepoints;
 338         unsigned int num_tracepoints;
 339 #endif
 340
 341 #ifdef CONFIG_TRACING
 342         const char **trace_bprintk_fmt_start;
 343         unsigned int num_trace_bprintk_fmt;
 344 #endif
 345 #ifdef CONFIG_EVENT_TRACING
 346         struct ftrace_event_call *trace_events;
 347         unsigned int num_trace_events;
 348 #endif
 349 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 350         unsigned long *ftrace_callsites;
 351         unsigned int num_ftrace_callsites;
 352 #endif
 353
 354 #ifdef CONFIG_MODULE_UNLOAD
 355         /* What modules depend on me? */
 356         struct list_head modules_which_use_me;
 357
 358         /* Who is waiting for us to be unloaded */
 359         struct task_struct *waiter;
 360
 361         /* Destruction function. */
 362         void (*exit)(void);
 363
 364 #ifdef CONFIG_SMP
 365         char *refptr;
 366 #else
 367         local_t ref;
 368 #endif
 369 #endif
 370
 371 #ifdef CONFIG_CONSTRUCTORS
 372         /* Constructor functions. */
 373         ctor_fn_t *ctors;
 374         unsigned int num_ctors;
 375 #endif
 376 };
 377 #ifndef MODULE_ARCH_INIT
 378 #define MODULE_ARCH_INIT {}
 379 #endif
 380
 381 extern struct mutex module_mutex;
 382
 383 /* FIXME: It'd be nice to isolate modules during init, too, so they
 384    aren't used before they (may) fail.  But presently too much code
 385    (IDE & SCSI) require entry into the module during init.*/
 386 static inline int module_is_live(struct module *mod)
 387 {
 388         return mod->state != MODULE_STATE_GOING;
 389 }
 390
 391 struct module *__module_text_address(unsigned long addr);
 392 struct module *__module_address(unsigned long addr);
 393 bool is_module_address(unsigned long addr);
 394 bool is_module_text_address(unsigned long addr);
 395
 396 static inline int within_module_core(unsigned long addr, struct module *mod)
 397 {
 398         return (unsigned long)mod->module_core <= addr &&
 399                addr < (unsigned long)mod->module_core + mod->core_size;
 400 }
 401
 402 static inline int within_module_init(unsigned long addr, struct module *mod)
 403 {
 404         return (unsigned long)mod->module_init <= addr &&
 405                addr < (unsigned long)mod->module_init + mod->init_size;
 406 }
 407
 408 /* Search for module by name: must hold module_mutex. */
 409 struct module *find_module(const char *name);
 410
 411 struct symsearch {
 412         const struct kernel_symbol *start, *stop;
 413         const unsigned long *crcs;
 414         enum {
 415                 NOT_GPL_ONLY,
 416                 GPL_ONLY,
 417                 WILL_BE_GPL_ONLY,
 418         } licence;
 419         bool unused;
 420 };
 421
 422 /* Search for an exported symbol by name. */
 423 const struct kernel_symbol *find_symbol(const char *name,
 424                                         struct module **owner,
 425                                         const unsigned long **crc,
 426                                         bool gplok,
 427                                         bool warn);
 428
 429 /* Walk the exported symbol table */
 430 bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
 431                             unsigned int symnum, void *data), void *data);
 432
 433 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 434    symnum out of range. */
 435 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 436                         char *name, char *module_name, int *exported);
 437
 438 /* Look for this name: can be of form module:name. */
 439 unsigned long module_kallsyms_lookup_name(const char *name);
 440
 441 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 442                                              struct module *, unsigned long),
 443                                    void *data);
 444
 445 extern void __module_put_and_exit(struct module *mod, long code)
 446         __attribute__((noreturn));
 447 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 448
 449 #ifdef CONFIG_MODULE_UNLOAD
 450 unsigned int module_refcount(struct module *mod);
 451 void __symbol_put(const char *symbol);
 452 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 453 void symbol_put_addr(void *addr);
 454
 455 static inline local_t *__module_ref_addr(struct module *mod, int cpu)
 456 {
 457 #ifdef CONFIG_SMP
 458         return (local_t *) (mod->refptr + per_cpu_offset(cpu));
 459 #else
 460         return &mod->ref;
 461 #endif
 462 }
 463
 464 /* Sometimes we know we already have a refcount, and it's easier not
 465    to handle the error case (which only happens with rmmod --wait). */
 466 static inline void __module_get(struct module *module)
 467 {
 468         if (module) {
 469                 unsigned int cpu = get_cpu();
 470                 local_inc(__module_ref_addr(module, cpu));
 471                 trace_module_get(module, _THIS_IP_,
 472                                  local_read(__module_ref_addr(module, cpu)));
 473                 put_cpu();
 474         }
 475 }
 476
 477 static inline int try_module_get(struct module *module)
 478 {
 479         int ret = 1;
 480
 481         if (module) {
 482                 unsigned int cpu = get_cpu();
 483                 if (likely(module_is_live(module))) {
 484                         local_inc(__module_ref_addr(module, cpu));
 485                         trace_module_get(module, _THIS_IP_,
 486                                 local_read(__module_ref_addr(module, cpu)));
 487                 }
 488                 else
 489                         ret = 0;
 490                 put_cpu();
 491         }
 492         return ret;
 493 }
 494
 495 extern void module_put(struct module *module);
 496
 497 #else /*!CONFIG_MODULE_UNLOAD*/
 498 static inline int try_module_get(struct module *module)
 499 {
 500         return !module || module_is_live(module);
 501 }
 502 static inline void module_put(struct module *module)
 503 {
 504 }
 505 static inline void __module_get(struct module *module)
 506 {
 507 }
 508 #define symbol_put(x) do { } while(0)
 509 #define symbol_put_addr(p) do { } while(0)
 510
 511 #endif /* CONFIG_MODULE_UNLOAD */
 512 int use_module(struct module *a, struct module *b);
 513
 514 /* This is a #define so the string doesn't get put in every .o file */
 515 #define module_name(mod)                        \
 516 ({                                              \
 517         struct module *__mod = (mod);           \
 518         __mod ? __mod->name : "kernel";         \
 519 })
 520
 521 /* For kallsyms to ask for address resolution.  namebuf should be at
 522  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 523  * found, otherwise NULL. */
 524 const char *module_address_lookup(unsigned long addr,
 525                             unsigned long *symbolsize,
 526                             unsigned long *offset,
 527                             char **modname,
 528                             char *namebuf);
 529 int lookup_module_symbol_name(unsigned long addr, char *symname);
 530 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 531
 532 /* For extable.c to search modules' exception tables. */
 533 const struct exception_table_entry *search_module_extables(unsigned long addr);
 534
 535 int register_module_notifier(struct notifier_block * nb);
 536 int unregister_module_notifier(struct notifier_block * nb);
 537
 538 extern void print_modules(void);
 539
 540 extern void module_update_tracepoints(void);
 541 extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
 542
 543 #else /* !CONFIG_MODULES... */
 544 #define EXPORT_SYMBOL(sym)
 545 #define EXPORT_SYMBOL_GPL(sym)
 546 #define EXPORT_SYMBOL_GPL_FUTURE(sym)
 547 #define EXPORT_UNUSED_SYMBOL(sym)
 548 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 549
 550 /* Given an address, look for it in the exception tables. */
 551 static inline const struct exception_table_entry *
 552 search_module_extables(unsigned long addr)
 553 {
 554         return NULL;
 555 }
 556
 557 static inline struct module *__module_address(unsigned long addr)
 558 {
 559         return NULL;
 560 }
 561
 562 static inline struct module *__module_text_address(unsigned long addr)
 563 {
 564         return NULL;
 565 }
 566
 567 static inline bool is_module_address(unsigned long addr)
 568 {
 569         return false;
 570 }
 571
 572 static inline bool is_module_text_address(unsigned long addr)
 573 {
 574         return false;
 575 }
 576
 577 /* Get/put a kernel symbol (calls should be symmetric) */
 578 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 579 #define symbol_put(x) do { } while(0)
 580 #define symbol_put_addr(x) do { } while(0)
 581
 582 static inline void __module_get(struct module *module)
 583 {
 584 }
 585
 586 static inline int try_module_get(struct module *module)
 587 {
 588         return 1;
 589 }
 590
 591 static inline void module_put(struct module *module)
 592 {
 593 }
 594
 595 #define module_name(mod) "kernel"
 596
 597 /* For kallsyms to ask for address resolution.  NULL means not found. */
 598 static inline const char *module_address_lookup(unsigned long addr,
 599                                           unsigned long *symbolsize,
 600                                           unsigned long *offset,
 601                                           char **modname,
 602                                           char *namebuf)
 603 {
 604         return NULL;
 605 }
 606
 607 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
 608 {
 609         return -ERANGE;
 610 }
 611
 612 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
 613 {
 614         return -ERANGE;
 615 }
 616
 617 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
 618                                         char *type, char *name,
 619                                         char *module_name, int *exported)
 620 {
 621         return -ERANGE;
 622 }
 623
 624 static inline unsigned long module_kallsyms_lookup_name(const char *name)
 625 {
 626         return 0;
 627 }
 628
 629 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 630                                                            struct module *,
 631                                                            unsigned long),
 632                                                  void *data)
 633 {
 634         return 0;
 635 }
 636
 637 static inline int register_module_notifier(struct notifier_block * nb)
 638 {
 639         /* no events will happen anyway, so this can always succeed */
 640         return 0;
 641 }
 642
 643 static inline int unregister_module_notifier(struct notifier_block * nb)
 644 {
 645         return 0;
 646 }
 647
 648 #define module_put_and_exit(code) do_exit(code)
 649
 650 static inline void print_modules(void)
 651 {
 652 }
 653
 654 static inline void module_update_tracepoints(void)
 655 {
 656 }
 657
 658 static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
 659 {
 660         return 0;
 661 }
 662
 663 #endif /* CONFIG_MODULES */
 664
 665 struct device_driver;
 666 #ifdef CONFIG_SYSFS
 667 struct module;
 668
 669 extern struct kset *module_kset;
 670 extern struct kobj_type module_ktype;
 671 extern int module_sysfs_initialized;
 672
 673 int mod_sysfs_init(struct module *mod);
 674 int mod_sysfs_setup(struct module *mod,
 675                            struct kernel_param *kparam,
 676                            unsigned int num_params);
 677 int module_add_modinfo_attrs(struct module *mod);
 678 void module_remove_modinfo_attrs(struct module *mod);
 679
 680 #else /* !CONFIG_SYSFS */
 681
 682 static inline int mod_sysfs_init(struct module *mod)
 683 {
 684         return 0;
 685 }
 686
 687 static inline int mod_sysfs_setup(struct module *mod,
 688                            struct kernel_param *kparam,
 689                            unsigned int num_params)
 690 {
 691         return 0;
 692 }
 693
 694 static inline int module_add_modinfo_attrs(struct module *mod)
 695 {
 696         return 0;
 697 }
 698
 699 static inline void module_remove_modinfo_attrs(struct module *mod)
 700 { }
 701
 702 #endif /* CONFIG_SYSFS */
 703
 704 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 705
 706 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 707
 708 #define __MODULE_STRING(x) __stringify(x)
 709
 710
 711 #ifdef CONFIG_GENERIC_BUG
 712 int  module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 713                          struct module *);
 714 void module_bug_cleanup(struct module *);
 715
 716 #else   /* !CONFIG_GENERIC_BUG */
 717
 718 static inline int  module_bug_finalize(const Elf_Ehdr *hdr,
 719                                         const Elf_Shdr *sechdrs,
 720                                         struct module *mod)
 721 {
 722         return 0;
 723 }
 724 static inline void module_bug_cleanup(struct module *mod) {}
 725 #endif  /* CONFIG_GENERIC_BUG */
 726
 727 #endif /* _LINUX_MODULE_H */