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/marker.h>
  19 #include <linux/tracepoint.h>
  20
  21 #include <asm/local.h>
  22 #include <asm/module.h>
  23
  24 #include <trace/events/module.h>
  25
  26 /* Not Yet Implemented */
  27 #define MODULE_SUPPORTED_DEVICE(name)
  28
  29 /* some toolchains uses a `_' prefix for all user symbols */
  30 #ifndef MODULE_SYMBOL_PREFIX
  31 #define MODULE_SYMBOL_PREFIX ""
  32 #endif
  33
  34 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
  35
  36 struct kernel_symbol
  37 {
  38         unsigned long value;
  39         const char *name;
  40 };
  41
  42 struct modversion_info
  43 {
  44         unsigned long crc;
  45         char name[MODULE_NAME_LEN];
  46 };
  47
  48 struct module;
  49
  50 struct module_attribute {
  51         struct attribute attr;
  52         ssize_t (*show)(struct module_attribute *, struct module *, char *);
  53         ssize_t (*store)(struct module_attribute *, struct module *,
  54                          const char *, size_t count);
  55         void (*setup)(struct module *, const char *);
  56         int (*test)(struct module *);
  57         void (*free)(struct module *);
  58 };
  59
  60 struct module_kobject
  61 {
  62         struct kobject kobj;
  63         struct module *mod;
  64         struct kobject *drivers_dir;
  65         struct module_param_attrs *mp;
  66 };
  67
  68 /* These are either module local, or the kernel's dummy ones. */
  69 extern int init_module(void);
  70 extern void cleanup_module(void);
  71
  72 /* Archs provide a method of finding the correct exception table. */
  73 struct exception_table_entry;
  74
  75 const struct exception_table_entry *
  76 search_extable(const struct exception_table_entry *first,
  77                const struct exception_table_entry *last,
  78                unsigned long value);
  79 void sort_extable(struct exception_table_entry *start,
  80                   struct exception_table_entry *finish);
  81 void sort_main_extable(void);
  82 void trim_init_extable(struct module *m);
  83
  84 #ifdef MODULE
  85 #define MODULE_GENERIC_TABLE(gtype,name)                        \
  86 extern const struct gtype##_id __mod_##gtype##_table            \
  87   __attribute__ ((unused, alias(__stringify(name))))
  88
  89 extern struct module __this_module;
  90 #define THIS_MODULE (&__this_module)
  91 #else  /* !MODULE */
  92 #define MODULE_GENERIC_TABLE(gtype,name)
  93 #define THIS_MODULE ((struct module *)0)
  94 #endif
  95
  96 /* Generic info of form tag = "info" */
  97 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
  98
  99 /* For userspace: you can also call me... */
 100 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
 101
 102 /*
 103  * The following license idents are currently accepted as indicating free
 104  * software modules
 105  *
 106  *      "GPL"                           [GNU Public License v2 or later]
 107  *      "GPL v2"                        [GNU Public License v2]
 108  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 109  *      "Dual BSD/GPL"                  [GNU Public License v2
 110  *                                       or BSD license choice]
 111  *      "Dual MIT/GPL"                  [GNU Public License v2
 112  *                                       or MIT license choice]
 113  *      "Dual MPL/GPL"                  [GNU Public License v2
 114  *                                       or Mozilla license choice]
 115  *
 116  * The following other idents are available
 117  *
 118  *      "Proprietary"                   [Non free products]
 119  *
 120  * There are dual licensed components, but when running with Linux it is the
 121  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 122  * is a GPL combined work.
 123  *
 124  * This exists for several reasons
 125  * 1.   So modinfo can show license info for users wanting to vet their setup
 126  *      is free
 127  * 2.   So the community can ignore bug reports including proprietary modules
 128  * 3.   So vendors can do likewise based on their own policies
 129  */
 130 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 131
 132 /* Author, ideally of form NAME[, NAME]*[ and NAME] */
 133 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
 134
 135 /* What your module does. */
 136 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 137
 138 /* One for each parameter, describing how to use it.  Some files do
 139    multiple of these per line, so can't just use MODULE_INFO. */
 140 #define MODULE_PARM_DESC(_parm, desc) \
 141         __MODULE_INFO(parm, _parm, #_parm ":" desc)
 142
 143 #define MODULE_DEVICE_TABLE(type,name)          \
 144   MODULE_GENERIC_TABLE(type##_device,name)
 145
 146 /* Version of form [<epoch>:]<version>[-<extra-version>].
 147    Or for CVS/RCS ID version, everything but the number is stripped.
 148   <epoch>: A (small) unsigned integer which allows you to start versions
 149            anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 150            "1:2.0".
 151   <version>: The <version> may contain only alphanumerics and the
 152            character `.'.  Ordered by numeric sort for numeric parts,
 153            ascii sort for ascii parts (as per RPM or DEB algorithm).
 154   <extraversion>: Like <version>, but inserted for local
 155            customizations, eg "rh3" or "rusty1".
 156
 157   Using this automatically adds a checksum of the .c files and the
 158   local headers in "srcversion".
 159 */
 160 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 161
 162 /* Optional firmware file (or files) needed by the module
 163  * format is simply firmware file name.  Multiple firmware
 164  * files require multiple MODULE_FIRMWARE() specifiers */
 165 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 166
 167 /* Given an address, look for it in the exception tables */
 168 const struct exception_table_entry *search_exception_tables(unsigned long add);
 169
 170 struct notifier_block;
 171
 172 #ifdef CONFIG_MODULES
 173
 174 /* Get/put a kernel symbol (calls must be symmetric) */
 175 void *__symbol_get(const char *symbol);
 176 void *__symbol_get_gpl(const char *symbol);
 177 #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
 178
 179 #ifndef __GENKSYMS__
 180 #ifdef CONFIG_MODVERSIONS
 181 /* Mark the CRC weak since genksyms apparently decides not to
 182  * generate a checksums for some symbols */
 183 #define __CRC_SYMBOL(sym, sec)                                  \
 184         extern void *__crc_##sym __attribute__((weak));         \
 185         static const unsigned long __kcrctab_##sym              \
 186         __used                                                  \
 187         __attribute__((section("__kcrctab" sec), unused))       \
 188         = (unsigned long) &__crc_##sym;
 189 #else
 190 #define __CRC_SYMBOL(sym, sec)
 191 #endif
 192
 193 /* For every exported symbol, place a struct in the __ksymtab section */
 194 #define __EXPORT_SYMBOL(sym, sec)                               \
 195         extern typeof(sym) sym;                                 \
 196         __CRC_SYMBOL(sym, sec)                                  \
 197         static const char __kstrtab_##sym[]                     \
 198         __attribute__((section("__ksymtab_strings"), aligned(1))) \
 199         = MODULE_SYMBOL_PREFIX #sym;                            \
 200         static const struct kernel_symbol __ksymtab_##sym       \
 201         __used                                                  \
 202         __attribute__((section("__ksymtab" sec), unused))       \
 203         = { (unsigned long)&sym, __kstrtab_##sym }
 204
 205 #define EXPORT_SYMBOL(sym)                                      \
 206         __EXPORT_SYMBOL(sym, "")
 207
 208 #define EXPORT_SYMBOL_GPL(sym)                                  \
 209         __EXPORT_SYMBOL(sym, "_gpl")
 210
 211 #define EXPORT_SYMBOL_GPL_FUTURE(sym)                           \
 212         __EXPORT_SYMBOL(sym, "_gpl_future")
 213
 214
 215 #ifdef CONFIG_UNUSED_SYMBOLS
 216 #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
 217 #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
 218 #else
 219 #define EXPORT_UNUSED_SYMBOL(sym)
 220 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 221 #endif
 222
 223 #endif
 224
 225 enum module_state
 226 {
 227         MODULE_STATE_LIVE,
 228         MODULE_STATE_COMING,
 229         MODULE_STATE_GOING,
 230 };
 231
 232 struct module
 233 {
 234         enum module_state state;
 235
 236         /* Member of list of modules */
 237         struct list_head list;
 238
 239         /* Unique handle for this module */
 240         char name[MODULE_NAME_LEN];
 241
 242         /* Sysfs stuff. */
 243         struct module_kobject mkobj;
 244         struct module_attribute *modinfo_attrs;
 245         const char *version;
 246         const char *srcversion;
 247         struct kobject *holders_dir;
 248
 249         /* Exported symbols */
 250         const struct kernel_symbol *syms;
 251         const unsigned long *crcs;
 252         unsigned int num_syms;
 253
 254         /* Kernel parameters. */
 255         struct kernel_param *kp;
 256         unsigned int num_kp;
 257
 258         /* GPL-only exported symbols. */
 259         unsigned int num_gpl_syms;
 260         const struct kernel_symbol *gpl_syms;
 261         const unsigned long *gpl_crcs;
 262
 263 #ifdef CONFIG_UNUSED_SYMBOLS
 264         /* unused exported symbols. */
 265         const struct kernel_symbol *unused_syms;
 266         const unsigned long *unused_crcs;
 267         unsigned int num_unused_syms;
 268
 269         /* GPL-only, unused exported symbols. */
 270         unsigned int num_unused_gpl_syms;
 271         const struct kernel_symbol *unused_gpl_syms;
 272         const unsigned long *unused_gpl_crcs;
 273 #endif
 274
 275         /* symbols that will be GPL-only in the near future. */
 276         const struct kernel_symbol *gpl_future_syms;
 277         const unsigned long *gpl_future_crcs;
 278         unsigned int num_gpl_future_syms;
 279
 280         /* Exception table */
 281         unsigned int num_exentries;
 282         struct exception_table_entry *extable;
 283
 284         /* Startup function. */
 285         int (*init)(void);
 286
 287         /* If this is non-NULL, vfree after init() returns */
 288         void *module_init;
 289
 290         /* Here is the actual code + data, vfree'd on unload. */
 291         void *module_core;
 292
 293         /* Here are the sizes of the init and core sections */
 294         unsigned int init_size, core_size;
 295
 296         /* The size of the executable code in each section.  */
 297         unsigned int init_text_size, core_text_size;
 298
 299         /* Arch-specific module values */
 300         struct mod_arch_specific arch;
 301
 302         unsigned int taints;    /* same bits as kernel:tainted */
 303
 304 #ifdef CONFIG_GENERIC_BUG
 305         /* Support for BUG */
 306         unsigned num_bugs;
 307         struct list_head bug_list;
 308         struct bug_entry *bug_table;
 309 #endif
 310
 311 #ifdef CONFIG_KALLSYMS
 312         /* We keep the symbol and string tables for kallsyms. */
 313         Elf_Sym *symtab;
 314         unsigned int num_symtab;
 315         char *strtab;
 316
 317         /* Section attributes */
 318         struct module_sect_attrs *sect_attrs;
 319
 320         /* Notes attributes */
 321         struct module_notes_attrs *notes_attrs;
 322 #endif
 323
 324         /* Per-cpu data. */
 325         void *percpu;
 326
 327         /* The command line arguments (may be mangled).  People like
 328            keeping pointers to this stuff */
 329         char *args;
 330 #ifdef CONFIG_MARKERS
 331         struct marker *markers;
 332         unsigned int num_markers;
 333 #endif
 334 #ifdef CONFIG_TRACEPOINTS
 335         struct tracepoint *tracepoints;
 336         unsigned int num_tracepoints;
 337 #endif
 338
 339 #ifdef CONFIG_TRACING
 340         const char **trace_bprintk_fmt_start;
 341         unsigned int num_trace_bprintk_fmt;
 342 #endif
 343 #ifdef CONFIG_EVENT_TRACING
 344         struct ftrace_event_call *trace_events;
 345         unsigned int num_trace_events;
 346 #endif
 347 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 348         unsigned long *ftrace_callsites;
 349         unsigned int num_ftrace_callsites;
 350 #endif
 351
 352 #ifdef CONFIG_MODULE_UNLOAD
 353         /* What modules depend on me? */
 354         struct list_head modules_which_use_me;
 355
 356         /* Who is waiting for us to be unloaded */
 357         struct task_struct *waiter;
 358
 359         /* Destruction function. */
 360         void (*exit)(void);
 361
 362 #ifdef CONFIG_SMP
 363         char *refptr;
 364 #else
 365         local_t ref;
 366 #endif
 367 #endif
 368
 369 #ifdef CONFIG_CONSTRUCTORS
 370         /* Constructor functions. */
 371         ctor_fn_t *ctors;
 372         unsigned int num_ctors;
 373 #endif
 374 };
 375 #ifndef MODULE_ARCH_INIT
 376 #define MODULE_ARCH_INIT {}
 377 #endif
 378
 379 extern struct mutex module_mutex;
 380
 381 /* FIXME: It'd be nice to isolate modules during init, too, so they
 382    aren't used before they (may) fail.  But presently too much code
 383    (IDE & SCSI) require entry into the module during init.*/
 384 static inline int module_is_live(struct module *mod)
 385 {
 386         return mod->state != MODULE_STATE_GOING;
 387 }
 388
 389 struct module *__module_text_address(unsigned long addr);
 390 struct module *__module_address(unsigned long addr);
 391 bool is_module_address(unsigned long addr);
 392 bool is_module_text_address(unsigned long addr);
 393
 394 static inline int within_module_core(unsigned long addr, struct module *mod)
 395 {
 396         return (unsigned long)mod->module_core <= addr &&
 397                addr < (unsigned long)mod->module_core + mod->core_size;
 398 }
 399
 400 static inline int within_module_init(unsigned long addr, struct module *mod)
 401 {
 402         return (unsigned long)mod->module_init <= addr &&
 403                addr < (unsigned long)mod->module_init + mod->init_size;
 404 }
 405
 406 /* Search for module by name: must hold module_mutex. */
 407 struct module *find_module(const char *name);
 408
 409 struct symsearch {
 410         const struct kernel_symbol *start, *stop;
 411         const unsigned long *crcs;
 412         enum {
 413                 NOT_GPL_ONLY,
 414                 GPL_ONLY,
 415                 WILL_BE_GPL_ONLY,
 416         } licence;
 417         bool unused;
 418 };
 419
 420 /* Search for an exported symbol by name. */
 421 const struct kernel_symbol *find_symbol(const char *name,
 422                                         struct module **owner,
 423                                         const unsigned long **crc,
 424                                         bool gplok,
 425                                         bool warn);
 426
 427 /* Walk the exported symbol table */
 428 bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
 429                             unsigned int symnum, void *data), void *data);
 430
 431 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 432    symnum out of range. */
 433 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 434                         char *name, char *module_name, int *exported);
 435
 436 /* Look for this name: can be of form module:name. */
 437 unsigned long module_kallsyms_lookup_name(const char *name);
 438
 439 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 440                                              struct module *, unsigned long),
 441                                    void *data);
 442
 443 extern void __module_put_and_exit(struct module *mod, long code)
 444         __attribute__((noreturn));
 445 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 446
 447 #ifdef CONFIG_MODULE_UNLOAD
 448 unsigned int module_refcount(struct module *mod);
 449 void __symbol_put(const char *symbol);
 450 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 451 void symbol_put_addr(void *addr);
 452
 453 static inline local_t *__module_ref_addr(struct module *mod, int cpu)
 454 {
 455 #ifdef CONFIG_SMP
 456         return (local_t *) (mod->refptr + per_cpu_offset(cpu));
 457 #else
 458         return &mod->ref;
 459 #endif
 460 }
 461
 462 /* Sometimes we know we already have a refcount, and it's easier not
 463    to handle the error case (which only happens with rmmod --wait). */
 464 static inline void __module_get(struct module *module)
 465 {
 466         if (module) {
 467                 unsigned int cpu = get_cpu();
 468                 local_inc(__module_ref_addr(module, cpu));
 469                 trace_module_get(module, _THIS_IP_,
 470                                  local_read(__module_ref_addr(module, cpu)));
 471                 put_cpu();
 472         }
 473 }
 474
 475 static inline int try_module_get(struct module *module)
 476 {
 477         int ret = 1;
 478
 479         if (module) {
 480                 unsigned int cpu = get_cpu();
 481                 if (likely(module_is_live(module))) {
 482                         local_inc(__module_ref_addr(module, cpu));
 483                         trace_module_get(module, _THIS_IP_,
 484                                 local_read(__module_ref_addr(module, cpu)));
 485                 }
 486                 else
 487                         ret = 0;
 488                 put_cpu();
 489         }
 490         return ret;
 491 }
 492
 493 extern void module_put(struct module *module);
 494
 495 #else /*!CONFIG_MODULE_UNLOAD*/
 496 static inline int try_module_get(struct module *module)
 497 {
 498         return !module || module_is_live(module);
 499 }
 500 static inline void module_put(struct module *module)
 501 {
 502 }
 503 static inline void __module_get(struct module *module)
 504 {
 505 }
 506 #define symbol_put(x) do { } while(0)
 507 #define symbol_put_addr(p) do { } while(0)
 508
 509 #endif /* CONFIG_MODULE_UNLOAD */
 510 int use_module(struct module *a, struct module *b);
 511
 512 /* This is a #define so the string doesn't get put in every .o file */
 513 #define module_name(mod)                        \
 514 ({                                              \
 515         struct module *__mod = (mod);           \
 516         __mod ? __mod->name : "kernel";         \
 517 })
 518
 519 /* For kallsyms to ask for address resolution.  namebuf should be at
 520  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 521  * found, otherwise NULL. */
 522 const char *module_address_lookup(unsigned long addr,
 523                             unsigned long *symbolsize,
 524                             unsigned long *offset,
 525                             char **modname,
 526                             char *namebuf);
 527 int lookup_module_symbol_name(unsigned long addr, char *symname);
 528 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 529
 530 /* For extable.c to search modules' exception tables. */
 531 const struct exception_table_entry *search_module_extables(unsigned long addr);
 532
 533 int register_module_notifier(struct notifier_block * nb);
 534 int unregister_module_notifier(struct notifier_block * nb);
 535
 536 extern void print_modules(void);
 537
 538 extern void module_update_markers(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_markers(void)
 655 {
 656 }
 657
 658 static inline void module_update_tracepoints(void)
 659 {
 660 }
 661
 662 static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
 663 {
 664         return 0;
 665 }
 666
 667 #endif /* CONFIG_MODULES */
 668
 669 struct device_driver;
 670 #ifdef CONFIG_SYSFS
 671 struct module;
 672
 673 extern struct kset *module_kset;
 674 extern struct kobj_type module_ktype;
 675 extern int module_sysfs_initialized;
 676
 677 int mod_sysfs_init(struct module *mod);
 678 int mod_sysfs_setup(struct module *mod,
 679                            struct kernel_param *kparam,
 680                            unsigned int num_params);
 681 int module_add_modinfo_attrs(struct module *mod);
 682 void module_remove_modinfo_attrs(struct module *mod);
 683
 684 #else /* !CONFIG_SYSFS */
 685
 686 static inline int mod_sysfs_init(struct module *mod)
 687 {
 688         return 0;
 689 }
 690
 691 static inline int mod_sysfs_setup(struct module *mod,
 692                            struct kernel_param *kparam,
 693                            unsigned int num_params)
 694 {
 695         return 0;
 696 }
 697
 698 static inline int module_add_modinfo_attrs(struct module *mod)
 699 {
 700         return 0;
 701 }
 702
 703 static inline void module_remove_modinfo_attrs(struct module *mod)
 704 { }
 705
 706 #endif /* CONFIG_SYSFS */
 707
 708 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 709
 710 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 711
 712 #define __MODULE_STRING(x) __stringify(x)
 713
 714
 715 #ifdef CONFIG_GENERIC_BUG
 716 int  module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 717                          struct module *);
 718 void module_bug_cleanup(struct module *);
 719
 720 #else   /* !CONFIG_GENERIC_BUG */
 721
 722 static inline int  module_bug_finalize(const Elf_Ehdr *hdr,
 723                                         const Elf_Shdr *sechdrs,
 724                                         struct module *mod)
 725 {
 726         return 0;
 727 }
 728 static inline void module_bug_cleanup(struct module *mod) {}
 729 #endif  /* CONFIG_GENERIC_BUG */
 730
 731 #endif /* _LINUX_MODULE_H */