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/jump_label.h>
  19 #include <linux/export.h>
  20 #include <linux/rbtree_latch.h>
  21
  22 #include <linux/percpu.h>
  23 #include <asm/module.h>
  24
  25 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
  26 #define MODULE_SIG_STRING "~Module signature appended~\n"
  27
  28 /* Not Yet Implemented */
  29 #define MODULE_SUPPORTED_DEVICE(name)
  30
  31 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
  32
  33 struct modversion_info {
  34         unsigned long crc;
  35         char name[MODULE_NAME_LEN];
  36 };
  37
  38 struct module;
  39
  40 struct module_kobject {
  41         struct kobject kobj;
  42         struct module *mod;
  43         struct kobject *drivers_dir;
  44         struct module_param_attrs *mp;
  45         struct completion *kobj_completion;
  46 };
  47
  48 struct module_attribute {
  49         struct attribute attr;
  50         ssize_t (*show)(struct module_attribute *, struct module_kobject *,
  51                         char *);
  52         ssize_t (*store)(struct module_attribute *, struct module_kobject *,
  53                          const char *, size_t count);
  54         void (*setup)(struct module *, const char *);
  55         int (*test)(struct module *);
  56         void (*free)(struct module *);
  57 };
  58
  59 struct module_version_attribute {
  60         struct module_attribute mattr;
  61         const char *module_name;
  62         const char *version;
  63 } __attribute__ ((__aligned__(sizeof(void *))));
  64
  65 extern ssize_t __modver_version_show(struct module_attribute *,
  66                                      struct module_kobject *, char *);
  67
  68 extern struct module_attribute module_uevent;
  69
  70 /* These are either module local, or the kernel's dummy ones. */
  71 extern int init_module(void);
  72 extern void cleanup_module(void);
  73
  74 /* Archs provide a method of finding the correct exception table. */
  75 struct exception_table_entry;
  76
  77 const struct exception_table_entry *
  78 search_extable(const struct exception_table_entry *first,
  79                const struct exception_table_entry *last,
  80                unsigned long value);
  81 void sort_extable(struct exception_table_entry *start,
  82                   struct exception_table_entry *finish);
  83 void sort_main_extable(void);
  84 void trim_init_extable(struct module *m);
  85
  86 /* Generic info of form tag = "info" */
  87 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
  88
  89 /* For userspace: you can also call me... */
  90 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
  91
  92 /* Soft module dependencies. See man modprobe.d for details.
  93  * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
  94  */
  95 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
  96
  97 /*
  98  * The following license idents are currently accepted as indicating free
  99  * software modules
 100  *
 101  *      "GPL"                           [GNU Public License v2 or later]
 102  *      "GPL v2"                        [GNU Public License v2]
 103  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
 104  *      "Dual BSD/GPL"                  [GNU Public License v2
 105  *                                       or BSD license choice]
 106  *      "Dual MIT/GPL"                  [GNU Public License v2
 107  *                                       or MIT license choice]
 108  *      "Dual MPL/GPL"                  [GNU Public License v2
 109  *                                       or Mozilla license choice]
 110  *
 111  * The following other idents are available
 112  *
 113  *      "Proprietary"                   [Non free products]
 114  *
 115  * There are dual licensed components, but when running with Linux it is the
 116  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
 117  * is a GPL combined work.
 118  *
 119  * This exists for several reasons
 120  * 1.   So modinfo can show license info for users wanting to vet their setup
 121  *      is free
 122  * 2.   So the community can ignore bug reports including proprietary modules
 123  * 3.   So vendors can do likewise based on their own policies
 124  */
 125 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 126
 127 /*
 128  * Author(s), use "Name <email>" or just "Name", for multiple
 129  * authors use multiple MODULE_AUTHOR() statements/lines.
 130  */
 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 #ifdef MODULE
 137 /* Creates an alias so file2alias.c can find device table. */
 138 #define MODULE_DEVICE_TABLE(type, name)                                 \
 139 extern const typeof(name) __mod_##type##__##name##_device_table         \
 140   __attribute__ ((unused, alias(__stringify(name))))
 141 #else  /* !MODULE */
 142 #define MODULE_DEVICE_TABLE(type, name)
 143 #endif
 144
 145 /* Version of form [<epoch>:]<version>[-<extra-version>].
 146  * Or for CVS/RCS ID version, everything but the number is stripped.
 147  * <epoch>: A (small) unsigned integer which allows you to start versions
 148  * anew. If not mentioned, it's zero.  eg. "2:1.0" is after
 149  * "1:2.0".
 150
 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
 155  * <extraversion>: Like <version>, but inserted for local
 156  * customizations, eg "rh3" or "rusty1".
 157
 158  * Using this automatically adds a checksum of the .c files and the
 159  * local headers in "srcversion".
 160  */
 161
 162 #if defined(MODULE) || !defined(CONFIG_SYSFS)
 163 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 164 #else
 165 #define MODULE_VERSION(_version)                                        \
 166         static struct module_version_attribute ___modver_attr = {       \
 167                 .mattr  = {                                             \
 168                         .attr   = {                                     \
 169                                 .name   = "version",                    \
 170                                 .mode   = S_IRUGO,                      \
 171                         },                                              \
 172                         .show   = __modver_version_show,                \
 173                 },                                                      \
 174                 .module_name    = KBUILD_MODNAME,                       \
 175                 .version        = _version,                             \
 176         };                                                              \
 177         static const struct module_version_attribute                    \
 178         __used __attribute__ ((__section__ ("__modver")))               \
 179         * __moduleparam_const __modver_attr = &___modver_attr
 180 #endif
 181
 182 /* Optional firmware file (or files) needed by the module
 183  * format is simply firmware file name.  Multiple firmware
 184  * files require multiple MODULE_FIRMWARE() specifiers */
 185 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
 186
 187 /* Given an address, look for it in the exception tables */
 188 const struct exception_table_entry *search_exception_tables(unsigned long add);
 189
 190 struct notifier_block;
 191
 192 #ifdef CONFIG_MODULES
 193
 194 extern int modules_disabled; /* for sysctl */
 195 /* Get/put a kernel symbol (calls must be symmetric) */
 196 void *__symbol_get(const char *symbol);
 197 void *__symbol_get_gpl(const char *symbol);
 198 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
 199
 200 /* modules using other modules: kdb wants to see this. */
 201 struct module_use {
 202         struct list_head source_list;
 203         struct list_head target_list;
 204         struct module *source, *target;
 205 };
 206
 207 enum module_state {
 208         MODULE_STATE_LIVE,      /* Normal state. */
 209         MODULE_STATE_COMING,    /* Full formed, running module_init. */
 210         MODULE_STATE_GOING,     /* Going away. */
 211         MODULE_STATE_UNFORMED,  /* Still setting it up. */
 212 };
 213
 214 struct module;
 215
 216 struct mod_tree_node {
 217         struct module *mod;
 218         struct latch_tree_node node;
 219 };
 220
 221 struct module {
 222         enum module_state state;
 223
 224         /* Member of list of modules */
 225         struct list_head list;
 226
 227         /* Unique handle for this module */
 228         char name[MODULE_NAME_LEN];
 229
 230         /* Sysfs stuff. */
 231         struct module_kobject mkobj;
 232         struct module_attribute *modinfo_attrs;
 233         const char *version;
 234         const char *srcversion;
 235         struct kobject *holders_dir;
 236
 237         /* Exported symbols */
 238         const struct kernel_symbol *syms;
 239         const unsigned long *crcs;
 240         unsigned int num_syms;
 241
 242         /* Kernel parameters. */
 243         struct kernel_param *kp;
 244         unsigned int num_kp;
 245
 246         /* GPL-only exported symbols. */
 247         unsigned int num_gpl_syms;
 248         const struct kernel_symbol *gpl_syms;
 249         const unsigned long *gpl_crcs;
 250
 251 #ifdef CONFIG_UNUSED_SYMBOLS
 252         /* unused exported symbols. */
 253         const struct kernel_symbol *unused_syms;
 254         const unsigned long *unused_crcs;
 255         unsigned int num_unused_syms;
 256
 257         /* GPL-only, unused exported symbols. */
 258         unsigned int num_unused_gpl_syms;
 259         const struct kernel_symbol *unused_gpl_syms;
 260         const unsigned long *unused_gpl_crcs;
 261 #endif
 262
 263 #ifdef CONFIG_MODULE_SIG
 264         /* Signature was verified. */
 265         bool sig_ok;
 266 #endif
 267
 268         /* symbols that will be GPL-only in the near future. */
 269         const struct kernel_symbol *gpl_future_syms;
 270         const unsigned long *gpl_future_crcs;
 271         unsigned int num_gpl_future_syms;
 272
 273         /* Exception table */
 274         unsigned int num_exentries;
 275         struct exception_table_entry *extable;
 276
 277         /* Startup function. */
 278         int (*init)(void);
 279
 280         /*
 281          * If this is non-NULL, vfree() after init() returns.
 282          *
 283          * Cacheline align here, such that:
 284          *   module_init, module_core, init_size, core_size,
 285          *   init_text_size, core_text_size and mtn_core::{mod,node[0]}
 286          * are on the same cacheline.
 287          */
 288         void *module_init       ____cacheline_aligned;
 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 #ifdef CONFIG_MODULES_TREE_LOOKUP
 300         /*
 301          * We want mtn_core::{mod,node[0]} to be in the same cacheline as the
 302          * above entries such that a regular lookup will only touch one
 303          * cacheline.
 304          */
 305         struct mod_tree_node    mtn_core;
 306         struct mod_tree_node    mtn_init;
 307 #endif
 308
 309         /* Size of RO sections of the module (text+rodata) */
 310         unsigned int init_ro_size, core_ro_size;
 311
 312         /* Arch-specific module values */
 313         struct mod_arch_specific arch;
 314
 315         unsigned int taints;    /* same bits as kernel:tainted */
 316
 317 #ifdef CONFIG_GENERIC_BUG
 318         /* Support for BUG */
 319         unsigned num_bugs;
 320         struct list_head bug_list;
 321         struct bug_entry *bug_table;
 322 #endif
 323
 324 #ifdef CONFIG_KALLSYMS
 325         /*
 326          * We keep the symbol and string tables for kallsyms.
 327          * The core_* fields below are temporary, loader-only (they
 328          * could really be discarded after module init).
 329          */
 330         Elf_Sym *symtab, *core_symtab;
 331         unsigned int num_symtab, core_num_syms;
 332         char *strtab, *core_strtab;
 333
 334         /* Section attributes */
 335         struct module_sect_attrs *sect_attrs;
 336
 337         /* Notes attributes */
 338         struct module_notes_attrs *notes_attrs;
 339 #endif
 340
 341         /* The command line arguments (may be mangled).  People like
 342            keeping pointers to this stuff */
 343         char *args;
 344
 345 #ifdef CONFIG_SMP
 346         /* Per-cpu data. */
 347         void __percpu *percpu;
 348         unsigned int percpu_size;
 349 #endif
 350
 351 #ifdef CONFIG_TRACEPOINTS
 352         unsigned int num_tracepoints;
 353         struct tracepoint * const *tracepoints_ptrs;
 354 #endif
 355 #ifdef HAVE_JUMP_LABEL
 356         struct jump_entry *jump_entries;
 357         unsigned int num_jump_entries;
 358 #endif
 359 #ifdef CONFIG_TRACING
 360         unsigned int num_trace_bprintk_fmt;
 361         const char **trace_bprintk_fmt_start;
 362 #endif
 363 #ifdef CONFIG_EVENT_TRACING
 364         struct ftrace_event_call **trace_events;
 365         unsigned int num_trace_events;
 366         struct trace_enum_map **trace_enums;
 367         unsigned int num_trace_enums;
 368 #endif
 369 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 370         unsigned int num_ftrace_callsites;
 371         unsigned long *ftrace_callsites;
 372 #endif
 373
 374 #ifdef CONFIG_LIVEPATCH
 375         bool klp_alive;
 376 #endif
 377
 378 #ifdef CONFIG_MODULE_UNLOAD
 379         /* What modules depend on me? */
 380         struct list_head source_list;
 381         /* What modules do I depend on? */
 382         struct list_head target_list;
 383
 384         /* Destruction function. */
 385         void (*exit)(void);
 386
 387         atomic_t refcnt;
 388 #endif
 389
 390 #ifdef CONFIG_CONSTRUCTORS
 391         /* Constructor functions. */
 392         ctor_fn_t *ctors;
 393         unsigned int num_ctors;
 394 #endif
 395 } ____cacheline_aligned;
 396 #ifndef MODULE_ARCH_INIT
 397 #define MODULE_ARCH_INIT {}
 398 #endif
 399
 400 extern struct mutex module_mutex;
 401
 402 /* FIXME: It'd be nice to isolate modules during init, too, so they
 403    aren't used before they (may) fail.  But presently too much code
 404    (IDE & SCSI) require entry into the module during init.*/
 405 static inline int module_is_live(struct module *mod)
 406 {
 407         return mod->state != MODULE_STATE_GOING;
 408 }
 409
 410 struct module *__module_text_address(unsigned long addr);
 411 struct module *__module_address(unsigned long addr);
 412 bool is_module_address(unsigned long addr);
 413 bool is_module_percpu_address(unsigned long addr);
 414 bool is_module_text_address(unsigned long addr);
 415
 416 static inline bool within_module_core(unsigned long addr,
 417                                       const struct module *mod)
 418 {
 419         return (unsigned long)mod->module_core <= addr &&
 420                addr < (unsigned long)mod->module_core + mod->core_size;
 421 }
 422
 423 static inline bool within_module_init(unsigned long addr,
 424                                       const struct module *mod)
 425 {
 426         return (unsigned long)mod->module_init <= addr &&
 427                addr < (unsigned long)mod->module_init + mod->init_size;
 428 }
 429
 430 static inline bool within_module(unsigned long addr, const struct module *mod)
 431 {
 432         return within_module_init(addr, mod) || within_module_core(addr, mod);
 433 }
 434
 435 /* Search for module by name: must hold module_mutex. */
 436 struct module *find_module(const char *name);
 437
 438 struct symsearch {
 439         const struct kernel_symbol *start, *stop;
 440         const unsigned long *crcs;
 441         enum {
 442                 NOT_GPL_ONLY,
 443                 GPL_ONLY,
 444                 WILL_BE_GPL_ONLY,
 445         } licence;
 446         bool unused;
 447 };
 448
 449 /*
 450  * Search for an exported symbol by name.
 451  *
 452  * Must be called with module_mutex held or preemption disabled.
 453  */
 454 const struct kernel_symbol *find_symbol(const char *name,
 455                                         struct module **owner,
 456                                         const unsigned long **crc,
 457                                         bool gplok,
 458                                         bool warn);
 459
 460 /*
 461  * Walk the exported symbol table
 462  *
 463  * Must be called with module_mutex held or preemption disabled.
 464  */
 465 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
 466                                     struct module *owner,
 467                                     void *data), void *data);
 468
 469 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
 470    symnum out of range. */
 471 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 472                         char *name, char *module_name, int *exported);
 473
 474 /* Look for this name: can be of form module:name. */
 475 unsigned long module_kallsyms_lookup_name(const char *name);
 476
 477 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
 478                                              struct module *, unsigned long),
 479                                    void *data);
 480
 481 extern void __module_put_and_exit(struct module *mod, long code)
 482         __attribute__((noreturn));
 483 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
 484
 485 #ifdef CONFIG_MODULE_UNLOAD
 486 int module_refcount(struct module *mod);
 487 void __symbol_put(const char *symbol);
 488 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
 489 void symbol_put_addr(void *addr);
 490
 491 /* Sometimes we know we already have a refcount, and it's easier not
 492    to handle the error case (which only happens with rmmod --wait). */
 493 extern void __module_get(struct module *module);
 494
 495 /* This is the Right Way to get a module: if it fails, it's being removed,
 496  * so pretend it's not there. */
 497 extern bool try_module_get(struct module *module);
 498
 499 extern void module_put(struct module *module);
 500
 501 #else /*!CONFIG_MODULE_UNLOAD*/
 502 static inline int try_module_get(struct module *module)
 503 {
 504         return !module || module_is_live(module);
 505 }
 506 static inline void module_put(struct module *module)
 507 {
 508 }
 509 static inline void __module_get(struct module *module)
 510 {
 511 }
 512 #define symbol_put(x) do { } while (0)
 513 #define symbol_put_addr(p) do { } while (0)
 514
 515 #endif /* CONFIG_MODULE_UNLOAD */
 516 int ref_module(struct module *a, struct module *b);
 517
 518 /* This is a #define so the string doesn't get put in every .o file */
 519 #define module_name(mod)                        \
 520 ({                                              \
 521         struct module *__mod = (mod);           \
 522         __mod ? __mod->name : "kernel";         \
 523 })
 524
 525 /* For kallsyms to ask for address resolution.  namebuf should be at
 526  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
 527  * found, otherwise NULL. */
 528 const char *module_address_lookup(unsigned long addr,
 529                             unsigned long *symbolsize,
 530                             unsigned long *offset,
 531                             char **modname,
 532                             char *namebuf);
 533 int lookup_module_symbol_name(unsigned long addr, char *symname);
 534 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
 535
 536 /* For extable.c to search modules' exception tables. */
 537 const struct exception_table_entry *search_module_extables(unsigned long addr);
 538
 539 int register_module_notifier(struct notifier_block *nb);
 540 int unregister_module_notifier(struct notifier_block *nb);
 541
 542 extern void print_modules(void);
 543
 544 #else /* !CONFIG_MODULES... */
 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 #endif /* CONFIG_MODULES */
 655
 656 #ifdef CONFIG_SYSFS
 657 extern struct kset *module_kset;
 658 extern struct kobj_type module_ktype;
 659 extern int module_sysfs_initialized;
 660 #endif /* CONFIG_SYSFS */
 661
 662 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
 663
 664 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
 665
 666 #define __MODULE_STRING(x) __stringify(x)
 667
 668 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
 669 extern void set_all_modules_text_rw(void);
 670 extern void set_all_modules_text_ro(void);
 671 #else
 672 static inline void set_all_modules_text_rw(void) { }
 673 static inline void set_all_modules_text_ro(void) { }
 674 #endif
 675
 676 #ifdef CONFIG_GENERIC_BUG
 677 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 678                          struct module *);
 679 void module_bug_cleanup(struct module *);
 680
 681 #else   /* !CONFIG_GENERIC_BUG */
 682
 683 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
 684                                         const Elf_Shdr *sechdrs,
 685                                         struct module *mod)
 686 {
 687 }
 688 static inline void module_bug_cleanup(struct module *mod) {}
 689 #endif  /* CONFIG_GENERIC_BUG */
 690
 691 #endif /* _LINUX_MODULE_H */