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 #include <asm/local.h>
  21
  22 #include <asm/module.h>
  23
  24 /* Not Yet Implemented */
  25 #define MODULE_SUPPORTED_DEVICE(name)
  26
  27 /* some toolchains uses a `_' prefix for all user symbols */
  28 #ifndef MODULE_SYMBOL_PREFIX
  29 #define MODULE_SYMBOL_PREFIX ""
  30 #endif
  31
  32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
  33
  34 struct kernel_symbol
  35 {
  36         unsigned long value;
  37         const char *name;
  38 };
  39
  40 struct modversion_info
  41 {
  42         unsigned long crc;
  43         char name[MODULE_NAME_LEN];
  44 };
  45
  46 struct module;
  47
  48 struct module_attribute {
  49         struct attribute attr;
  50         ssize_t (*show)(struct module_attribute *, struct module *, char *);
  51         ssize_t (*store)(struct module_attribute *, struct module *,
  52                          const char *, size_t count);
  53         void (*setup)(struct module *, const char *);
  54         int (*test)(struct module *);
  55         void (*free)(struct module *);
  56 };
  57
  58 struct module_kobject
  59 {
  60         struct kobject kobj;
  61         struct module *mod;
  62         struct kobject *drivers_dir;
  63         struct module_param_attrs *mp;
  64 };
  65
  66 /* These are either module local, or the kernel's dummy ones. */
  67 extern int init_module(void);
  68 extern void cleanup_module(void);
  69
  70 /* Archs provide a method of finding the correct exception table. */
  71 struct exception_table_entry;
  72
  73 const struct exception_table_entry *
  74 search_extable(const struct exception_table_entry *first,
  75                const struct exception_table_entry *last,
  76                unsigned long value);
  77 void sort_extable(struct exception_table_entry *start,
  78                   struct exception_table_entry *finish);
  79 void sort_main_extable(void);
  80 void trim_init_extable(struct module *m);
  81
  82 #ifdef MODULE
  83 #define MODULE_GENERIC_TABLE(gtype,name)                        \
  84 extern const struct gtype##_id __mod_##gtype##_table            \
  85   __attribute__ ((unused, alias(__stringify(name))))
  86
  87 extern struct module __this_module;
  88 #define THIS_MODULE (&__this_module)
  89 #else  /* !MODULE */
  90 #define MODULE_GENERIC_TABLE(gtype,name)
  91 #define THIS_MODULE ((struct module *)0)
  92 #endif
  93
  94 /* Generic info of form tag = "info" */
  95 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
  96
  97 /* For userspace: you can also call me... */
  98 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
  99
 100 /*
 101  * The following license idents are currently accepted as indicating free
 102  * software modules
 103  *
 104  *      "GPL"                           [GNU Public License v2 or later]
 105  *      "GPL v2"                        [GNU Public License v2]
 106  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 107  *      "Dual BSD/GPL"                  [GNU Public License v2
 108  *                                       or BSD license choice]
 109  *      "Dual MIT/GPL"                  [GNU Public License v2
 110  *                                       or MIT license choice]
 111  *      "Dual MPL/GPL"                  [GNU Public License v2
 112  *                                       or Mozilla license choice]
 113  *
 114  * The following other idents are available
 115  *
 116  *      "Proprietary"                   [Non free products]
 117  *
 118  * There are dual licensed components, but when running with Linux it is the
 119  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 120  * is a GPL combined work.
 121  *
 122  * This exists for several reasons
 123  * 1.   So modinfo can show license info for users wanting to vet their setup
 124  *      is free
 125  * 2.   So the community can ignore bug reports including proprietary modules
 126  * 3.   So vendors can do likewise based on their own policies
 127  */
 128 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 129
 130 /* Author, ideally of form NAME[, NAME]*[ and NAME] */
 131 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
 132
 133 /* What your module does. */
 134 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 135
 136 /* One for each parameter, describing how to use it.  Some files do
 137    multiple of these per line, so can't just use MODULE_INFO. */
 138 #define MODULE_PARM_DESC(_parm, desc) \
 139         __MODULE_INFO(parm, _parm, #_parm ":" desc)
 140
 141 #define MODULE_DEVICE_TABLE(type,name)          \
 142   MODULE_GENERIC_TABLE(type##_device,name)
 143
 144 /* Version of form [<epoch>:]<version>[-<extra-version>].
 145    Or for CVS/RCS ID version, everything but the number is stripped.
 146   <epoch>: A (small) unsigned integer which allows you to start versions
 147            anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 148            "1:2.0".
 149   <version>: The <version> may contain only alphanumerics and the
 150            character `.'.  Ordered by numeric sort for numeric parts,
 151            ascii sort for ascii parts (as per RPM or DEB algorithm).
 152   <extraversion>: Like <version>, but inserted for local
 153            customizations, eg "rh3" or "rusty1".
 154
 155   Using this automatically adds a checksum of the .c files and the
 156   local headers in "srcversion".
 157 */
 158 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 159
 160 /* Optional firmware file (or files) needed by the module
 161  * format is simply firmware file name.  Multiple firmware
 162  * files require multiple MODULE_FIRMWARE() specifiers */
 163 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 164
 165 /* Given an address, look for it in the exception tables */
 166 const struct exception_table_entry *search_exception_tables(unsigned long add);
 167
 168 struct notifier_block;
 169
 170 #ifdef CONFIG_MODULES
 171
 172 /* Get/put a kernel symbol (calls must be symmetric) */
 173 void *__symbol_get(const char *symbol);
 174 void *__symbol_get_gpl(const char *symbol);
 175 #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
 176
 177 #ifndef __GENKSYMS__
 178 #ifdef CONFIG_MODVERSIONS
 179 /* Mark the CRC weak since genksyms apparently decides not to
 180  * generate a checksums for some symbols */
 181 #define __CRC_SYMBOL(sym, sec)                                  \
 182         extern void *__crc_##sym __attribute__((weak));         \
 183         static const unsigned long __kcrctab_##sym              \
 184         __used                                                  \
 185         __attribute__((section("__kcrctab" sec), unused))       \
 186         = (unsigned long) &__crc_##sym;
 187 #else
 188 #define __CRC_SYMBOL(sym, sec)
 189 #endif
 190
 191 /* For every exported symbol, place a struct in the __ksymtab section */
 192 #define __EXPORT_SYMBOL(sym, sec)                               \
 193         extern typeof(sym) sym;                                 \
 194         __CRC_SYMBOL(sym, sec)                                  \
 195         static const char __kstrtab_##sym[]                     \
 196         __attribute__((section("__ksymtab_strings"), aligned(1))) \
 197         = MODULE_SYMBOL_PREFIX #sym;                            \
 198         static const struct kernel_symbol __ksymtab_##sym       \
 199         __used                                                  \
 200         __attribute__((section("__ksymtab" sec), unused))       \
 201         = { (unsigned long)&sym, __kstrtab_##sym }
 202
 203 #define EXPORT_SYMBOL(sym)                                      \
 204         __EXPORT_SYMBOL(sym, "")
 205
 206 #define EXPORT_SYMBOL_GPL(sym)                                  \
 207         __EXPORT_SYMBOL(sym, "_gpl")
 208
 209 #define EXPORT_SYMBOL_GPL_FUTURE(sym)                           \
 210         __EXPORT_SYMBOL(sym, "_gpl_future")
 211
 212
 213 #ifdef CONFIG_UNUSED_SYMBOLS
 214 #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
 215 #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
 216 #else
 217 #define EXPORT_UNUSED_SYMBOL(sym)
 218 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 219 #endif
 220
 221 #endif
 222
 223 enum module_state
 224 {
 225         MODULE_STATE_LIVE,
 226         MODULE_STATE_COMING,
 227         MODULE_STATE_GOING,
 228 };
 229
 230 struct module
 231 {
 232         enum module_state state;
 233
 234         /* Member of list of modules */
 235         struct list_head list;
 236
 237         /* Unique handle for this module */
 238         char name[MODULE_NAME_LEN];
 239
 240         /* Sysfs stuff. */
 241         struct module_kobject mkobj;
 242         struct module_attribute *modinfo_attrs;
 243         const char *version;
 244         const char *srcversion;
 245         struct kobject *holders_dir;
 246
 247         /* Exported symbols */
 248         const struct kernel_symbol *syms;
 249         const unsigned long *crcs;
 250         unsigned int num_syms;
 251
 252         /* Kernel parameters. */
 253         struct kernel_param *kp;
 254         unsigned int num_kp;
 255
 256         /* GPL-only exported symbols. */
 257         unsigned int num_gpl_syms;
 258         const struct kernel_symbol *gpl_syms;
 259         const unsigned long *gpl_crcs;
 260
 261 #ifdef CONFIG_UNUSED_SYMBOLS
 262         /* unused exported symbols. */
 263         const struct kernel_symbol *unused_syms;
 264         const unsigned long *unused_crcs;
 265         unsigned int num_unused_syms;
 266
 267         /* GPL-only, unused exported symbols. */
 268         unsigned int num_unused_gpl_syms;
 269         const struct kernel_symbol *unused_gpl_syms;
 270         const unsigned long *unused_gpl_crcs;
 271 #endif
 272
 273         /* symbols that will be GPL-only in the near future. */
 274         const struct kernel_symbol *gpl_future_syms;
 275         const unsigned long *gpl_future_crcs;
 276         unsigned int num_gpl_future_syms;
 277
 278         /* Exception table */
 279         unsigned int num_exentries;
 280         struct exception_table_entry *extable;
 281
 282         /* Startup function. */
 283         int (*init)(void);
 284
 285         /* If this is non-NULL, vfree after init() returns */
 286         void *module_init;
 287
 288         /* Here is the actual code + data, vfree'd on unload. */
 289         void *module_core;
 290
 291         /* Here are the sizes of the init and core sections */
 292         unsigned int init_size, core_size;
 293
 294         /* The size of the executable code in each section.  */
 295         unsigned int init_text_size, core_text_size;
 296
 297         /* Arch-specific module values */
 298         struct mod_arch_specific arch;
 299
 300         unsigned int taints;    /* same bits as kernel:tainted */
 301
 302 #ifdef CONFIG_GENERIC_BUG
 303         /* Support for BUG */
 304         unsigned num_bugs;
 305         struct list_head bug_list;
 306         struct bug_entry *bug_table;
 307 #endif
 308
 309 #ifdef CONFIG_KALLSYMS
 310         /* We keep the symbol and string tables for kallsyms. */
 311         Elf_Sym *symtab;
 312         unsigned int num_symtab;
 313         char *strtab;
 314
 315         /* Section attributes */
 316         struct module_sect_attrs *sect_attrs;
 317
 318         /* Notes attributes */
 319         struct module_notes_attrs *notes_attrs;
 320 #endif
 321
 322         /* Per-cpu data. */
 323         void *percpu;
 324
 325         /* The command line arguments (may be mangled).  People like
 326            keeping pointers to this stuff */
 327         char *args;
 328 #ifdef CONFIG_MARKERS
 329         struct marker *markers;
 330         unsigned int num_markers;
 331 #endif
 332 #ifdef CONFIG_TRACEPOINTS
 333         struct tracepoint *tracepoints;
 334         unsigned int num_tracepoints;
 335 #endif
 336
 337 #ifdef CONFIG_TRACING
 338         const char **trace_bprintk_fmt_start;
 339         unsigned int num_trace_bprintk_fmt;
 340 #endif
 341 #ifdef CONFIG_EVENT_TRACING
 342         struct ftrace_event_call *trace_events;
 343         unsigned int num_trace_events;
 344 #endif
 345 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 346         unsigned long *ftrace_callsites;
 347         unsigned int num_ftrace_callsites;
 348 #endif
 349
 350 #ifdef CONFIG_MODULE_UNLOAD
 351         /* What modules depend on me? */
 352         struct list_head modules_which_use_me;
 353
 354         /* Who is waiting for us to be unloaded */
 355         struct task_struct *waiter;
 356
 357         /* Destruction function. */
 358         void (*exit)(void);
 359
 360 #ifdef CONFIG_SMP
 361         char *refptr;
 362 #else
 363         local_t ref;
 364 #endif
 365 #endif
 366 };
 367 #ifndef MODULE_ARCH_INIT
 368 #define MODULE_ARCH_INIT {}
 369 #endif
 370
 371 extern struct mutex module_mutex;
 372
 373 /* FIXME: It'd be nice to isolate modules during init, too, so they
 374    aren't used before they (may) fail.  But presently too much code
 375    (IDE & SCSI) require entry into the module during init.*/
 376 static inline int module_is_live(struct module *mod)
 377 {
 378         return mod->state != MODULE_STATE_GOING;
 379 }
 380
 381 struct module *__module_text_address(unsigned long addr);
 382 struct module *__module_address(unsigned long addr);
 383 bool is_module_address(unsigned long addr);
 384 bool is_module_text_address(unsigned long addr);
 385
 386 static inline int within_module_core(unsigned long addr, struct module *mod)
 387 {
 388         return (unsigned long)mod->module_core <= addr &&
 389                addr < (unsigned long)mod->module_core + mod->core_size;
 390 }
 391
 392 static inline int within_module_init(unsigned long addr, struct module *mod)
 393 {
 394         return (unsigned long)mod->module_init <= addr &&
 395                addr < (unsigned long)mod->module_init + mod->init_size;
 396 }
 397
 398 /* Search for module by name: must hold module_mutex. */
 399 struct module *find_module(const char *name);
 400
 401 struct symsearch {
 402         const struct kernel_symbol *start, *stop;
 403         const unsigned long *crcs;
 404         enum {
 405                 NOT_GPL_ONLY,
 406                 GPL_ONLY,
 407                 WILL_BE_GPL_ONLY,
 408         } licence;
 409         bool unused;
 410 };
 411
 412 /* Search for an exported symbol by name. */
 413 const struct kernel_symbol *find_symbol(const char *name,
 414                                         struct module **owner,
 415                                         const unsigned long **crc,
 416                                         bool gplok,
 417                                         bool warn);
 418
 419 /* Walk the exported symbol table */
 420 bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
 421                             unsigned int symnum, void *data), void *data);
 422
 423 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 424    symnum out of range. */
 425 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 426                         char *name, char *module_name, int *exported);
 427
 428 /* Look for this name: can be of form module:name. */
 429 unsigned long module_kallsyms_lookup_name(const char *name);
 430
 431 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 432                                              struct module *, unsigned long),
 433                                    void *data);
 434
 435 extern void __module_put_and_exit(struct module *mod, long code)
 436         __attribute__((noreturn));
 437 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 438
 439 #ifdef CONFIG_MODULE_UNLOAD
 440 unsigned int module_refcount(struct module *mod);
 441 void __symbol_put(const char *symbol);
 442 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 443 void symbol_put_addr(void *addr);
 444
 445 static inline local_t *__module_ref_addr(struct module *mod, int cpu)
 446 {
 447 #ifdef CONFIG_SMP
 448         return (local_t *) (mod->refptr + per_cpu_offset(cpu));
 449 #else
 450         return &mod->ref;
 451 #endif
 452 }
 453
 454 /* Sometimes we know we already have a refcount, and it's easier not
 455    to handle the error case (which only happens with rmmod --wait). */
 456 static inline void __module_get(struct module *module)
 457 {
 458         if (module) {
 459                 local_inc(__module_ref_addr(module, get_cpu()));
 460                 put_cpu();
 461         }
 462 }
 463
 464 static inline int try_module_get(struct module *module)
 465 {
 466         int ret = 1;
 467
 468         if (module) {
 469                 unsigned int cpu = get_cpu();
 470                 if (likely(module_is_live(module)))
 471                         local_inc(__module_ref_addr(module, cpu));
 472                 else
 473                         ret = 0;
 474                 put_cpu();
 475         }
 476         return ret;
 477 }
 478
 479 extern void module_put(struct module *module);
 480
 481 #else /*!CONFIG_MODULE_UNLOAD*/
 482 static inline int try_module_get(struct module *module)
 483 {
 484         return !module || module_is_live(module);
 485 }
 486 static inline void module_put(struct module *module)
 487 {
 488 }
 489 static inline void __module_get(struct module *module)
 490 {
 491 }
 492 #define symbol_put(x) do { } while(0)
 493 #define symbol_put_addr(p) do { } while(0)
 494
 495 #endif /* CONFIG_MODULE_UNLOAD */
 496 int use_module(struct module *a, struct module *b);
 497
 498 /* This is a #define so the string doesn't get put in every .o file */
 499 #define module_name(mod)                        \
 500 ({                                              \
 501         struct module *__mod = (mod);           \
 502         __mod ? __mod->name : "kernel";         \
 503 })
 504
 505 /* For kallsyms to ask for address resolution.  namebuf should be at
 506  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 507  * found, otherwise NULL. */
 508 const char *module_address_lookup(unsigned long addr,
 509                             unsigned long *symbolsize,
 510                             unsigned long *offset,
 511                             char **modname,
 512                             char *namebuf);
 513 int lookup_module_symbol_name(unsigned long addr, char *symname);
 514 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 515
 516 /* For extable.c to search modules' exception tables. */
 517 const struct exception_table_entry *search_module_extables(unsigned long addr);
 518
 519 int register_module_notifier(struct notifier_block * nb);
 520 int unregister_module_notifier(struct notifier_block * nb);
 521
 522 extern void print_modules(void);
 523
 524 extern void module_update_markers(void);
 525
 526 extern void module_update_tracepoints(void);
 527 extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
 528
 529 #else /* !CONFIG_MODULES... */
 530 #define EXPORT_SYMBOL(sym)
 531 #define EXPORT_SYMBOL_GPL(sym)
 532 #define EXPORT_SYMBOL_GPL_FUTURE(sym)
 533 #define EXPORT_UNUSED_SYMBOL(sym)
 534 #define EXPORT_UNUSED_SYMBOL_GPL(sym)
 535
 536 /* Given an address, look for it in the exception tables. */
 537 static inline const struct exception_table_entry *
 538 search_module_extables(unsigned long addr)
 539 {
 540         return NULL;
 541 }
 542
 543 static inline struct module *__module_address(unsigned long addr)
 544 {
 545         return NULL;
 546 }
 547
 548 static inline struct module *__module_text_address(unsigned long addr)
 549 {
 550         return NULL;
 551 }
 552
 553 static inline bool is_module_address(unsigned long addr)
 554 {
 555         return false;
 556 }
 557
 558 static inline bool is_module_text_address(unsigned long addr)
 559 {
 560         return false;
 561 }
 562
 563 /* Get/put a kernel symbol (calls should be symmetric) */
 564 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 565 #define symbol_put(x) do { } while(0)
 566 #define symbol_put_addr(x) do { } while(0)
 567
 568 static inline void __module_get(struct module *module)
 569 {
 570 }
 571
 572 static inline int try_module_get(struct module *module)
 573 {
 574         return 1;
 575 }
 576
 577 static inline void module_put(struct module *module)
 578 {
 579 }
 580
 581 #define module_name(mod) "kernel"
 582
 583 /* For kallsyms to ask for address resolution.  NULL means not found. */
 584 static inline const char *module_address_lookup(unsigned long addr,
 585                                           unsigned long *symbolsize,
 586                                           unsigned long *offset,
 587                                           char **modname,
 588                                           char *namebuf)
 589 {
 590         return NULL;
 591 }
 592
 593 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
 594 {
 595         return -ERANGE;
 596 }
 597
 598 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
 599 {
 600         return -ERANGE;
 601 }
 602
 603 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
 604                                         char *type, char *name,
 605                                         char *module_name, int *exported)
 606 {
 607         return -ERANGE;
 608 }
 609
 610 static inline unsigned long module_kallsyms_lookup_name(const char *name)
 611 {
 612         return 0;
 613 }
 614
 615 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 616                                                            struct module *,
 617                                                            unsigned long),
 618                                                  void *data)
 619 {
 620         return 0;
 621 }
 622
 623 static inline int register_module_notifier(struct notifier_block * nb)
 624 {
 625         /* no events will happen anyway, so this can always succeed */
 626         return 0;
 627 }
 628
 629 static inline int unregister_module_notifier(struct notifier_block * nb)
 630 {
 631         return 0;
 632 }
 633
 634 #define module_put_and_exit(code) do_exit(code)
 635
 636 static inline void print_modules(void)
 637 {
 638 }
 639
 640 static inline void module_update_markers(void)
 641 {
 642 }
 643
 644 static inline void module_update_tracepoints(void)
 645 {
 646 }
 647
 648 static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
 649 {
 650         return 0;
 651 }
 652
 653 #endif /* CONFIG_MODULES */
 654
 655 struct device_driver;
 656 #ifdef CONFIG_SYSFS
 657 struct module;
 658
 659 extern struct kset *module_kset;
 660 extern struct kobj_type module_ktype;
 661 extern int module_sysfs_initialized;
 662
 663 int mod_sysfs_init(struct module *mod);
 664 int mod_sysfs_setup(struct module *mod,
 665                            struct kernel_param *kparam,
 666                            unsigned int num_params);
 667 int module_add_modinfo_attrs(struct module *mod);
 668 void module_remove_modinfo_attrs(struct module *mod);
 669
 670 #else /* !CONFIG_SYSFS */
 671
 672 static inline int mod_sysfs_init(struct module *mod)
 673 {
 674         return 0;
 675 }
 676
 677 static inline int mod_sysfs_setup(struct module *mod,
 678                            struct kernel_param *kparam,
 679                            unsigned int num_params)
 680 {
 681         return 0;
 682 }
 683
 684 static inline int module_add_modinfo_attrs(struct module *mod)
 685 {
 686         return 0;
 687 }
 688
 689 static inline void module_remove_modinfo_attrs(struct module *mod)
 690 { }
 691
 692 #endif /* CONFIG_SYSFS */
 693
 694 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 695
 696 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 697
 698 #define __MODULE_STRING(x) __stringify(x)
 699
 700 #endif /* _LINUX_MODULE_H */