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