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 #ifdef CONFIG_SMP
 334         /* Per-cpu data. */
 335         void __percpu *percpu;
 336         unsigned int percpu_size;
 337 #endif
 338
 339         /* The command line arguments (may be mangled).  People like
 340            keeping pointers to this stuff */
 341         char *args;
 342 #ifdef CONFIG_TRACEPOINTS
 343         struct tracepoint *tracepoints;
 344         unsigned int num_tracepoints;
 345 #endif
 346
 347 #ifdef CONFIG_TRACING
 348         const char **trace_bprintk_fmt_start;
 349         unsigned int num_trace_bprintk_fmt;
 350 #endif
 351 #ifdef CONFIG_EVENT_TRACING
 352         struct ftrace_event_call *trace_events;
 353         unsigned int num_trace_events;
 354 #endif
 355 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 356         unsigned long *ftrace_callsites;
 357         unsigned int num_ftrace_callsites;
 358 #endif
 359
 360 #ifdef CONFIG_MODULE_UNLOAD
 361         /* What modules depend on me? */
 362         struct list_head modules_which_use_me;
 363
 364         /* Who is waiting for us to be unloaded */
 365         struct task_struct *waiter;
 366
 367         /* Destruction function. */
 368         void (*exit)(void);
 369
 370         struct module_ref {
 371                 unsigned int incs;
 372                 unsigned int decs;
 373         } __percpu *refptr;
 374 #endif
 375
 376 #ifdef CONFIG_CONSTRUCTORS
 377         /* Constructor functions. */
 378         ctor_fn_t *ctors;
 379         unsigned int num_ctors;
 380 #endif
 381 };
 382 #ifndef MODULE_ARCH_INIT
 383 #define MODULE_ARCH_INIT {}
 384 #endif
 385
 386 extern struct mutex module_mutex;
 387
 388 /* FIXME: It'd be nice to isolate modules during init, too, so they
 389    aren't used before they (may) fail.  But presently too much code
 390    (IDE & SCSI) require entry into the module during init.*/
 391 static inline int module_is_live(struct module *mod)
 392 {
 393         return mod->state != MODULE_STATE_GOING;
 394 }
 395
 396 struct module *__module_text_address(unsigned long addr);
 397 struct module *__module_address(unsigned long addr);
 398 bool is_module_address(unsigned long addr);
 399 bool is_module_percpu_address(unsigned long addr);
 400 bool is_module_text_address(unsigned long addr);
 401
 402 static inline int within_module_core(unsigned long addr, struct module *mod)
 403 {
 404         return (unsigned long)mod->module_core <= addr &&
 405                addr < (unsigned long)mod->module_core + mod->core_size;
 406 }
 407
 408 static inline int within_module_init(unsigned long addr, struct module *mod)
 409 {
 410         return (unsigned long)mod->module_init <= addr &&
 411                addr < (unsigned long)mod->module_init + mod->init_size;
 412 }
 413
 414 /* Search for module by name: must hold module_mutex. */
 415 struct module *find_module(const char *name);
 416
 417 struct symsearch {
 418         const struct kernel_symbol *start, *stop;
 419         const unsigned long *crcs;
 420         enum {
 421                 NOT_GPL_ONLY,
 422                 GPL_ONLY,
 423                 WILL_BE_GPL_ONLY,
 424         } licence;
 425         bool unused;
 426 };
 427
 428 /* Search for an exported symbol by name. */
 429 const struct kernel_symbol *find_symbol(const char *name,
 430                                         struct module **owner,
 431                                         const unsigned long **crc,
 432                                         bool gplok,
 433                                         bool warn);
 434
 435 /* Walk the exported symbol table */
 436 bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
 437                             unsigned int symnum, void *data), void *data);
 438
 439 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 440    symnum out of range. */
 441 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 442                         char *name, char *module_name, int *exported);
 443
 444 /* Look for this name: can be of form module:name. */
 445 unsigned long module_kallsyms_lookup_name(const char *name);
 446
 447 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 448                                              struct module *, unsigned long),
 449                                    void *data);
 450
 451 extern void __module_put_and_exit(struct module *mod, long code)
 452         __attribute__((noreturn));
 453 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 454
 455 #ifdef CONFIG_MODULE_UNLOAD
 456 unsigned int module_refcount(struct module *mod);
 457 void __symbol_put(const char *symbol);
 458 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 459 void symbol_put_addr(void *addr);
 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                 preempt_disable();
 467                 __this_cpu_inc(module->refptr->incs);
 468                 trace_module_get(module, _THIS_IP_);
 469                 preempt_enable();
 470         }
 471 }
 472
 473 static inline int try_module_get(struct module *module)
 474 {
 475         int ret = 1;
 476
 477         if (module) {
 478                 preempt_disable();
 479
 480                 if (likely(module_is_live(module))) {
 481                         __this_cpu_inc(module->refptr->incs);
 482                         trace_module_get(module, _THIS_IP_);
 483                 } else
 484                         ret = 0;
 485
 486                 preempt_enable();
 487         }
 488         return ret;
 489 }
 490
 491 extern void module_put(struct module *module);
 492
 493 #else /*!CONFIG_MODULE_UNLOAD*/
 494 static inline int try_module_get(struct module *module)
 495 {
 496         return !module || module_is_live(module);
 497 }
 498 static inline void module_put(struct module *module)
 499 {
 500 }
 501 static inline void __module_get(struct module *module)
 502 {
 503 }
 504 #define symbol_put(x) do { } while(0)
 505 #define symbol_put_addr(p) do { } while(0)
 506
 507 #endif /* CONFIG_MODULE_UNLOAD */
 508 int use_module(struct module *a, struct module *b);
 509
 510 /* This is a #define so the string doesn't get put in every .o file */
 511 #define module_name(mod)                        \
 512 ({                                              \
 513         struct module *__mod = (mod);           \
 514         __mod ? __mod->name : "kernel";         \
 515 })
 516
 517 /* For kallsyms to ask for address resolution.  namebuf should be at
 518  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 519  * found, otherwise NULL. */
 520 const char *module_address_lookup(unsigned long addr,
 521                             unsigned long *symbolsize,
 522                             unsigned long *offset,
 523                             char **modname,
 524                             char *namebuf);
 525 int lookup_module_symbol_name(unsigned long addr, char *symname);
 526 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 527
 528 /* For extable.c to search modules' exception tables. */
 529 const struct exception_table_entry *search_module_extables(unsigned long addr);
 530
 531 int register_module_notifier(struct notifier_block * nb);
 532 int unregister_module_notifier(struct notifier_block * nb);
 533
 534 extern void print_modules(void);
 535
 536 extern void module_update_tracepoints(void);
 537 extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
 538
 539 #else /* !CONFIG_MODULES... */
 540 #define EXPORT_SYMBOL(sym)
 541 #define EXPORT_SYMBOL_GPL(sym)
 542 #define EXPORT_SYMBOL_GPL_FUTURE(sym)
 543 #define EXPORT_UNUSED_SYMBOL(sym)
 544 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 545
 546 /* Given an address, look for it in the exception tables. */
 547 static inline const struct exception_table_entry *
 548 search_module_extables(unsigned long addr)
 549 {
 550         return NULL;
 551 }
 552
 553 static inline struct module *__module_address(unsigned long addr)
 554 {
 555         return NULL;
 556 }
 557
 558 static inline struct module *__module_text_address(unsigned long addr)
 559 {
 560         return NULL;
 561 }
 562
 563 static inline bool is_module_address(unsigned long addr)
 564 {
 565         return false;
 566 }
 567
 568 static inline bool is_module_percpu_address(unsigned long addr)
 569 {
 570         return false;
 571 }
 572
 573 static inline bool is_module_text_address(unsigned long addr)
 574 {
 575         return false;
 576 }
 577
 578 /* Get/put a kernel symbol (calls should be symmetric) */
 579 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 580 #define symbol_put(x) do { } while(0)
 581 #define symbol_put_addr(x) do { } while(0)
 582
 583 static inline void __module_get(struct module *module)
 584 {
 585 }
 586
 587 static inline int try_module_get(struct module *module)
 588 {
 589         return 1;
 590 }
 591
 592 static inline void module_put(struct module *module)
 593 {
 594 }
 595
 596 #define module_name(mod) "kernel"
 597
 598 /* For kallsyms to ask for address resolution.  NULL means not found. */
 599 static inline const char *module_address_lookup(unsigned long addr,
 600                                           unsigned long *symbolsize,
 601                                           unsigned long *offset,
 602                                           char **modname,
 603                                           char *namebuf)
 604 {
 605         return NULL;
 606 }
 607
 608 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
 609 {
 610         return -ERANGE;
 611 }
 612
 613 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
 614 {
 615         return -ERANGE;
 616 }
 617
 618 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
 619                                         char *type, char *name,
 620                                         char *module_name, int *exported)
 621 {
 622         return -ERANGE;
 623 }
 624
 625 static inline unsigned long module_kallsyms_lookup_name(const char *name)
 626 {
 627         return 0;
 628 }
 629
 630 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 631                                                            struct module *,
 632                                                            unsigned long),
 633                                                  void *data)
 634 {
 635         return 0;
 636 }
 637
 638 static inline int register_module_notifier(struct notifier_block * nb)
 639 {
 640         /* no events will happen anyway, so this can always succeed */
 641         return 0;
 642 }
 643
 644 static inline int unregister_module_notifier(struct notifier_block * nb)
 645 {
 646         return 0;
 647 }
 648
 649 #define module_put_and_exit(code) do_exit(code)
 650
 651 static inline void print_modules(void)
 652 {
 653 }
 654
 655 static inline void module_update_tracepoints(void)
 656 {
 657 }
 658
 659 static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
 660 {
 661         return 0;
 662 }
 663
 664 #endif /* CONFIG_MODULES */
 665
 666 struct device_driver;
 667 #ifdef CONFIG_SYSFS
 668 struct module;
 669
 670 extern struct kset *module_kset;
 671 extern struct kobj_type module_ktype;
 672 extern int module_sysfs_initialized;
 673
 674 int mod_sysfs_init(struct module *mod);
 675 int mod_sysfs_setup(struct module *mod,
 676                            struct kernel_param *kparam,
 677                            unsigned int num_params);
 678 int module_add_modinfo_attrs(struct module *mod);
 679 void module_remove_modinfo_attrs(struct module *mod);
 680
 681 #else /* !CONFIG_SYSFS */
 682
 683 static inline int mod_sysfs_init(struct module *mod)
 684 {
 685         return 0;
 686 }
 687
 688 static inline int mod_sysfs_setup(struct module *mod,
 689                            struct kernel_param *kparam,
 690                            unsigned int num_params)
 691 {
 692         return 0;
 693 }
 694
 695 static inline int module_add_modinfo_attrs(struct module *mod)
 696 {
 697         return 0;
 698 }
 699
 700 static inline void module_remove_modinfo_attrs(struct module *mod)
 701 { }
 702
 703 #endif /* CONFIG_SYSFS */
 704
 705 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 706
 707 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 708
 709 #define __MODULE_STRING(x) __stringify(x)
 710
 711
 712 #ifdef CONFIG_GENERIC_BUG
 713 int  module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 714                          struct module *);
 715 void module_bug_cleanup(struct module *);
 716
 717 #else   /* !CONFIG_GENERIC_BUG */
 718
 719 static inline int  module_bug_finalize(const Elf_Ehdr *hdr,
 720                                         const Elf_Shdr *sechdrs,
 721                                         struct module *mod)
 722 {
 723         return 0;
 724 }
 725 static inline void module_bug_cleanup(struct module *mod) {}
 726 #endif  /* CONFIG_GENERIC_BUG */
 727
 728 #endif /* _LINUX_MODULE_H */