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