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