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/init.h>
15 #include <linux/elf.h>
16 #include <linux/stringify.h>
17 #include <linux/kobject.h>
18 #include <linux/moduleparam.h>
19 #include <linux/jump_label.h>
20 #include <linux/export.h>
21 #include <linux/rbtree_latch.h>
22
23 #include <linux/percpu.h>
24 #include <asm/module.h>
25
26 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
27 #define MODULE_SIG_STRING "~Module signature appended~\n"
28
29 /* Not Yet Implemented */
30 #define MODULE_SUPPORTED_DEVICE(name)
31
32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
33
34 struct modversion_info {
35 unsigned long crc;
36 char name[MODULE_NAME_LEN];
37 };
38
39 struct module;
40
41 struct module_kobject {
42 struct kobject kobj;
43 struct module *mod;
44 struct kobject *drivers_dir;
45 struct module_param_attrs *mp;
46 struct completion *kobj_completion;
47 };
48
49 struct module_attribute {
50 struct attribute attr;
51 ssize_t (*show)(struct module_attribute *, struct module_kobject *,
52 char *);
53 ssize_t (*store)(struct module_attribute *, struct module_kobject *,
54 const char *, size_t count);
55 void (*setup)(struct module *, const char *);
56 int (*test)(struct module *);
57 void (*free)(struct module *);
58 };
59
60 struct module_version_attribute {
61 struct module_attribute mattr;
62 const char *module_name;
63 const char *version;
64 } __attribute__ ((__aligned__(sizeof(void *))));
65
66 extern ssize_t __modver_version_show(struct module_attribute *,
67 struct module_kobject *, char *);
68
69 extern struct module_attribute module_uevent;
70
71 /* These are either module local, or the kernel's dummy ones. */
72 extern int init_module(void);
73 extern void cleanup_module(void);
74
75 #ifndef MODULE
76 /**
77 * module_init() - driver initialization entry point
78 * @x: function to be run at kernel boot time or module insertion
79 *
80 * module_init() will either be called during do_initcalls() (if
81 * builtin) or at module insertion time (if a module). There can only
82 * be one per module.
83 */
84 #define module_init(x) __initcall(x);
85
86 /**
87 * module_exit() - driver exit entry point
88 * @x: function to be run when driver is removed
89 *
90 * module_exit() will wrap the driver clean-up code
91 * with cleanup_module() when used with rmmod when
92 * the driver is a module. If the driver is statically
93 * compiled into the kernel, module_exit() has no effect.
94 * There can only be one per module.
95 */
96 #define module_exit(x) __exitcall(x);
97
98 #else /* MODULE */
99
100 /*
101 * In most cases loadable modules do not need custom
102 * initcall levels. There are still some valid cases where
103 * a driver may be needed early if built in, and does not
104 * matter when built as a loadable module. Like bus
105 * snooping debug drivers.
106 */
107 #define early_initcall(fn) module_init(fn)
108 #define core_initcall(fn) module_init(fn)
109 #define core_initcall_sync(fn) module_init(fn)
110 #define postcore_initcall(fn) module_init(fn)
111 #define postcore_initcall_sync(fn) module_init(fn)
112 #define arch_initcall(fn) module_init(fn)
113 #define subsys_initcall(fn) module_init(fn)
114 #define subsys_initcall_sync(fn) module_init(fn)
115 #define fs_initcall(fn) module_init(fn)
116 #define fs_initcall_sync(fn) module_init(fn)
117 #define rootfs_initcall(fn) module_init(fn)
118 #define device_initcall(fn) module_init(fn)
119 #define device_initcall_sync(fn) module_init(fn)
120 #define late_initcall(fn) module_init(fn)
121 #define late_initcall_sync(fn) module_init(fn)
122
123 #define console_initcall(fn) module_init(fn)
124 #define security_initcall(fn) module_init(fn)
125
126 /* Each module must use one module_init(). */
127 #define module_init(initfn) \
128 static inline initcall_t __maybe_unused __inittest(void) \
129 { return initfn; } \
130 int init_module(void) __copy(initfn) __attribute__((alias(#initfn)));
131
132 /* This is only required if you want to be unloadable. */
133 #define module_exit(exitfn) \
134 static inline exitcall_t __maybe_unused __exittest(void) \
135 { return exitfn; } \
136 void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn)));
137
138 #endif
139
140 /* This means "can be init if no module support, otherwise module load
141 may call it." */
142 #ifdef CONFIG_MODULES
143 #define __init_or_module
144 #define __initdata_or_module
145 #define __initconst_or_module
146 #define __INIT_OR_MODULE .text
147 #define __INITDATA_OR_MODULE .data
148 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits
149 #else
150 #define __init_or_module __init
151 #define __initdata_or_module __initdata
152 #define __initconst_or_module __initconst
153 #define __INIT_OR_MODULE __INIT
154 #define __INITDATA_OR_MODULE __INITDATA
155 #define __INITRODATA_OR_MODULE __INITRODATA
156 #endif /*CONFIG_MODULES*/
157
158 /* Archs provide a method of finding the correct exception table. */
159 struct exception_table_entry;
160
161 const struct exception_table_entry *
162 search_extable(const struct exception_table_entry *first,
163 const struct exception_table_entry *last,
164 unsigned long value);
165 void sort_extable(struct exception_table_entry *start,
166 struct exception_table_entry *finish);
167 void sort_main_extable(void);
168 void trim_init_extable(struct module *m);
169
170 /* Generic info of form tag = "info" */
171 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
172
173 /* For userspace: you can also call me... */
174 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
175
176 /* Soft module dependencies. See man modprobe.d for details.
177 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
178 */
179 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
180
181 /*
182 * The following license idents are currently accepted as indicating free
183 * software modules
184 *
185 * "GPL" [GNU Public License v2 or later]
186 * "GPL v2" [GNU Public License v2]
187 * "GPL and additional rights" [GNU Public License v2 rights and more]
188 * "Dual BSD/GPL" [GNU Public License v2
189 * or BSD license choice]
190 * "Dual MIT/GPL" [GNU Public License v2
191 * or MIT license choice]
192 * "Dual MPL/GPL" [GNU Public License v2
193 * or Mozilla license choice]
194 *
195 * The following other idents are available
196 *
197 * "Proprietary" [Non free products]
198 *
199 * There are dual licensed components, but when running with Linux it is the
200 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
201 * is a GPL combined work.
202 *
203 * This exists for several reasons
204 * 1. So modinfo can show license info for users wanting to vet their setup
205 * is free
206 * 2. So the community can ignore bug reports including proprietary modules
207 * 3. So vendors can do likewise based on their own policies
208 */
209 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
210
211 /*
212 * Author(s), use "Name <email>" or just "Name", for multiple
213 * authors use multiple MODULE_AUTHOR() statements/lines.
214 */
215 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
216
217 /* What your module does. */
218 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
219
220 #ifdef MODULE
221 /* Creates an alias so file2alias.c can find device table. */
222 #define MODULE_DEVICE_TABLE(type, name) \
223 extern const typeof(name) __mod_##type##__##name##_device_table \
224 __attribute__ ((unused, alias(__stringify(name))))
225 #else /* !MODULE */
226 #define MODULE_DEVICE_TABLE(type, name)
227 #endif
228
229 /* Version of form [<epoch>:]<version>[-<extra-version>].
230 * Or for CVS/RCS ID version, everything but the number is stripped.
231 * <epoch>: A (small) unsigned integer which allows you to start versions
232 * anew. If not mentioned, it's zero. eg. "2:1.0" is after
233 * "1:2.0".
234
235 * <version>: The <version> may contain only alphanumerics and the
236 * character `.'. Ordered by numeric sort for numeric parts,
237 * ascii sort for ascii parts (as per RPM or DEB algorithm).
238
239 * <extraversion>: Like <version>, but inserted for local
240 * customizations, eg "rh3" or "rusty1".
241
242 * Using this automatically adds a checksum of the .c files and the
243 * local headers in "srcversion".
244 */
245
246 #if defined(MODULE) || !defined(CONFIG_SYSFS)
247 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
248 #else
249 #define MODULE_VERSION(_version) \
250 static struct module_version_attribute ___modver_attr = { \
251 .mattr = { \
252 .attr = { \
253 .name = "version", \
254 .mode = S_IRUGO, \
255 }, \
256 .show = __modver_version_show, \
257 }, \
258 .module_name = KBUILD_MODNAME, \
259 .version = _version, \
260 }; \
261 static const struct module_version_attribute \
262 __used __attribute__ ((__section__ ("__modver"))) \
263 * __moduleparam_const __modver_attr = &___modver_attr
264 #endif
265
266 /* Optional firmware file (or files) needed by the module
267 * format is simply firmware file name. Multiple firmware
268 * files require multiple MODULE_FIRMWARE() specifiers */
269 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
270
271 /* Given an address, look for it in the exception tables */
272 const struct exception_table_entry *search_exception_tables(unsigned long add);
273
274 struct notifier_block;
275
276 #ifdef CONFIG_MODULES
277
278 extern int modules_disabled; /* for sysctl */
279 /* Get/put a kernel symbol (calls must be symmetric) */
280 void *__symbol_get(const char *symbol);
281 void *__symbol_get_gpl(const char *symbol);
282 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
283
284 /* modules using other modules: kdb wants to see this. */
285 struct module_use {
286 struct list_head source_list;
287 struct list_head target_list;
288 struct module *source, *target;
289 };
290
291 enum module_state {
292 MODULE_STATE_LIVE, /* Normal state. */
293 MODULE_STATE_COMING, /* Full formed, running module_init. */
294 MODULE_STATE_GOING, /* Going away. */
295 MODULE_STATE_UNFORMED, /* Still setting it up. */
296 };
297
298 struct module;
299
300 struct mod_tree_node {
301 struct module *mod;
302 struct latch_tree_node node;
303 };
304
305 struct mod_kallsyms {
306 Elf_Sym *symtab;
307 unsigned int num_symtab;
308 char *strtab;
309 };
310
311 struct module {
312 enum module_state state;
313
314 /* Member of list of modules */
315 struct list_head list;
316
317 /* Unique handle for this module */
318 char name[MODULE_NAME_LEN];
319
320 /* Sysfs stuff. */
321 struct module_kobject mkobj;
322 struct module_attribute *modinfo_attrs;
323 const char *version;
324 const char *srcversion;
325 struct kobject *holders_dir;
326
327 /* Exported symbols */
328 const struct kernel_symbol *syms;
329 const unsigned long *crcs;
330 unsigned int num_syms;
331
332 /* Kernel parameters. */
333 #ifdef CONFIG_SYSFS
334 struct mutex param_lock;
335 #endif
336 struct kernel_param *kp;
337 unsigned int num_kp;
338
339 /* GPL-only exported symbols. */
340 unsigned int num_gpl_syms;
341 const struct kernel_symbol *gpl_syms;
342 const unsigned long *gpl_crcs;
343
344 #ifdef CONFIG_UNUSED_SYMBOLS
345 /* unused exported symbols. */
346 const struct kernel_symbol *unused_syms;
347 const unsigned long *unused_crcs;
348 unsigned int num_unused_syms;
349
350 /* GPL-only, unused exported symbols. */
351 unsigned int num_unused_gpl_syms;
352 const struct kernel_symbol *unused_gpl_syms;
353 const unsigned long *unused_gpl_crcs;
354 #endif
355
356 #ifdef CONFIG_MODULE_SIG
357 /* Signature was verified. */
358 bool sig_ok;
359 #endif
360
361 bool async_probe_requested;
362
363 /* symbols that will be GPL-only in the near future. */
364 const struct kernel_symbol *gpl_future_syms;
365 const unsigned long *gpl_future_crcs;
366 unsigned int num_gpl_future_syms;
367
368 /* Exception table */
369 unsigned int num_exentries;
370 struct exception_table_entry *extable;
371
372 /* Startup function. */
373 int (*init)(void);
374
375 /*
376 * If this is non-NULL, vfree() after init() returns.
377 *
378 * Cacheline align here, such that:
379 * module_init, module_core, init_size, core_size,
380 * init_text_size, core_text_size and mtn_core::{mod,node[0]}
381 * are on the same cacheline.
382 */
383 void *module_init ____cacheline_aligned;
384
385 /* Here is the actual code + data, vfree'd on unload. */
386 void *module_core;
387
388 /* Here are the sizes of the init and core sections */
389 unsigned int init_size, core_size;
390
391 /* The size of the executable code in each section. */
392 unsigned int init_text_size, core_text_size;
393
394 #ifdef CONFIG_MODULES_TREE_LOOKUP
395 /*
396 * We want mtn_core::{mod,node[0]} to be in the same cacheline as the
397 * above entries such that a regular lookup will only touch one
398 * cacheline.
399 */
400 struct mod_tree_node mtn_core;
401 struct mod_tree_node mtn_init;
402 #endif
403
404 /* Size of RO sections of the module (text+rodata) */
405 unsigned int init_ro_size, core_ro_size;
406
407 /* Arch-specific module values */
408 struct mod_arch_specific arch;
409
410 unsigned int taints; /* same bits as kernel:tainted */
411
412 #ifdef CONFIG_GENERIC_BUG
413 /* Support for BUG */
414 unsigned num_bugs;
415 struct list_head bug_list;
416 struct bug_entry *bug_table;
417 #endif
418
419 #ifdef CONFIG_KALLSYMS
420 /* Protected by RCU and/or module_mutex: use rcu_dereference() */
421 struct mod_kallsyms *kallsyms;
422 struct mod_kallsyms core_kallsyms;
423
424 /* Section attributes */
425 struct module_sect_attrs *sect_attrs;
426
427 /* Notes attributes */
428 struct module_notes_attrs *notes_attrs;
429 #endif
430
431 /* The command line arguments (may be mangled). People like
432 keeping pointers to this stuff */
433 char *args;
434
435 #ifdef CONFIG_SMP
436 /* Per-cpu data. */
437 void __percpu *percpu;
438 unsigned int percpu_size;
439 #endif
440
441 #ifdef CONFIG_TRACEPOINTS
442 unsigned int num_tracepoints;
443 struct tracepoint * const *tracepoints_ptrs;
444 #endif
445 #ifdef HAVE_JUMP_LABEL
446 struct jump_entry *jump_entries;
447 unsigned int num_jump_entries;
448 #endif
449 #ifdef CONFIG_TRACING
450 unsigned int num_trace_bprintk_fmt;
451 const char **trace_bprintk_fmt_start;
452 #endif
453 #ifdef CONFIG_EVENT_TRACING
454 struct trace_event_call **trace_events;
455 unsigned int num_trace_events;
456 struct trace_enum_map **trace_enums;
457 unsigned int num_trace_enums;
458 #endif
459 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
460 unsigned int num_ftrace_callsites;
461 unsigned long *ftrace_callsites;
462 #endif
463
464 #ifdef CONFIG_LIVEPATCH
465 bool klp_alive;
466 #endif
467
468 #ifdef CONFIG_MODULE_UNLOAD
469 /* What modules depend on me? */
470 struct list_head source_list;
471 /* What modules do I depend on? */
472 struct list_head target_list;
473
474 /* Destruction function. */
475 void (*exit)(void);
476
477 atomic_t refcnt;
478 #endif
479
480 #ifdef CONFIG_CONSTRUCTORS
481 /* Constructor functions. */
482 ctor_fn_t *ctors;
483 unsigned int num_ctors;
484 #endif
485 } ____cacheline_aligned;
486 #ifndef MODULE_ARCH_INIT
487 #define MODULE_ARCH_INIT {}
488 #endif
489
490 extern struct mutex module_mutex;
491
492 /* FIXME: It'd be nice to isolate modules during init, too, so they
493 aren't used before they (may) fail. But presently too much code
494 (IDE & SCSI) require entry into the module during init.*/
495 static inline int module_is_live(struct module *mod)
496 {
497 return mod->state != MODULE_STATE_GOING;
498 }
499
500 struct module *__module_text_address(unsigned long addr);
501 struct module *__module_address(unsigned long addr);
502 bool is_module_address(unsigned long addr);
503 bool is_module_percpu_address(unsigned long addr);
504 bool is_module_text_address(unsigned long addr);
505
506 static inline bool within_module_core(unsigned long addr,
507 const struct module *mod)
508 {
509 return (unsigned long)mod->module_core <= addr &&
510 addr < (unsigned long)mod->module_core + mod->core_size;
511 }
512
513 static inline bool within_module_init(unsigned long addr,
514 const struct module *mod)
515 {
516 return (unsigned long)mod->module_init <= addr &&
517 addr < (unsigned long)mod->module_init + mod->init_size;
518 }
519
520 static inline bool within_module(unsigned long addr, const struct module *mod)
521 {
522 return within_module_init(addr, mod) || within_module_core(addr, mod);
523 }
524
525 /* Search for module by name: must hold module_mutex. */
526 struct module *find_module(const char *name);
527
528 struct symsearch {
529 const struct kernel_symbol *start, *stop;
530 const unsigned long *crcs;
531 enum {
532 NOT_GPL_ONLY,
533 GPL_ONLY,
534 WILL_BE_GPL_ONLY,
535 } licence;
536 bool unused;
537 };
538
539 /*
540 * Search for an exported symbol by name.
541 *
542 * Must be called with module_mutex held or preemption disabled.
543 */
544 const struct kernel_symbol *find_symbol(const char *name,
545 struct module **owner,
546 const unsigned long **crc,
547 bool gplok,
548 bool warn);
549
550 /*
551 * Walk the exported symbol table
552 *
553 * Must be called with module_mutex held or preemption disabled.
554 */
555 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
556 struct module *owner,
557 void *data), void *data);
558
559 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
560 symnum out of range. */
561 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
562 char *name, char *module_name, int *exported);
563
564 /* Look for this name: can be of form module:name. */
565 unsigned long module_kallsyms_lookup_name(const char *name);
566
567 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
568 struct module *, unsigned long),
569 void *data);
570
571 extern void __module_put_and_exit(struct module *mod, long code)
572 __attribute__((noreturn));
573 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
574
575 #ifdef CONFIG_MODULE_UNLOAD
576 int module_refcount(struct module *mod);
577 void __symbol_put(const char *symbol);
578 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
579 void symbol_put_addr(void *addr);
580
581 /* Sometimes we know we already have a refcount, and it's easier not
582 to handle the error case (which only happens with rmmod --wait). */
583 extern void __module_get(struct module *module);
584
585 /* This is the Right Way to get a module: if it fails, it's being removed,
586 * so pretend it's not there. */
587 extern bool try_module_get(struct module *module);
588
589 extern void module_put(struct module *module);
590
591 #else /*!CONFIG_MODULE_UNLOAD*/
592 static inline int try_module_get(struct module *module)
593 {
594 return !module || module_is_live(module);
595 }
596 static inline void module_put(struct module *module)
597 {
598 }
599 static inline void __module_get(struct module *module)
600 {
601 }
602 #define symbol_put(x) do { } while (0)
603 #define symbol_put_addr(p) do { } while (0)
604
605 #endif /* CONFIG_MODULE_UNLOAD */
606 int ref_module(struct module *a, struct module *b);
607
608 /* This is a #define so the string doesn't get put in every .o file */
609 #define module_name(mod) \
610 ({ \
611 struct module *__mod = (mod); \
612 __mod ? __mod->name : "kernel"; \
613 })
614
615 /* For kallsyms to ask for address resolution. namebuf should be at
616 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
617 * found, otherwise NULL. */
618 const char *module_address_lookup(unsigned long addr,
619 unsigned long *symbolsize,
620 unsigned long *offset,
621 char **modname,
622 char *namebuf);
623 int lookup_module_symbol_name(unsigned long addr, char *symname);
624 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
625
626 /* For extable.c to search modules' exception tables. */
627 const struct exception_table_entry *search_module_extables(unsigned long addr);
628
629 int register_module_notifier(struct notifier_block *nb);
630 int unregister_module_notifier(struct notifier_block *nb);
631
632 extern void print_modules(void);
633
634 static inline bool module_requested_async_probing(struct module *module)
635 {
636 return module && module->async_probe_requested;
637 }
638
639 #else /* !CONFIG_MODULES... */
640
641 /* Given an address, look for it in the exception tables. */
642 static inline const struct exception_table_entry *
643 search_module_extables(unsigned long addr)
644 {
645 return NULL;
646 }
647
648 static inline struct module *__module_address(unsigned long addr)
649 {
650 return NULL;
651 }
652
653 static inline struct module *__module_text_address(unsigned long addr)
654 {
655 return NULL;
656 }
657
658 static inline bool is_module_address(unsigned long addr)
659 {
660 return false;
661 }
662
663 static inline bool is_module_percpu_address(unsigned long addr)
664 {
665 return false;
666 }
667
668 static inline bool is_module_text_address(unsigned long addr)
669 {
670 return false;
671 }
672
673 /* Get/put a kernel symbol (calls should be symmetric) */
674 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
675 #define symbol_put(x) do { } while (0)
676 #define symbol_put_addr(x) do { } while (0)
677
678 static inline void __module_get(struct module *module)
679 {
680 }
681
682 static inline int try_module_get(struct module *module)
683 {
684 return 1;
685 }
686
687 static inline void module_put(struct module *module)
688 {
689 }
690
691 #define module_name(mod) "kernel"
692
693 /* For kallsyms to ask for address resolution. NULL means not found. */
694 static inline const char *module_address_lookup(unsigned long addr,
695 unsigned long *symbolsize,
696 unsigned long *offset,
697 char **modname,
698 char *namebuf)
699 {
700 return NULL;
701 }
702
703 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
704 {
705 return -ERANGE;
706 }
707
708 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
709 {
710 return -ERANGE;
711 }
712
713 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
714 char *type, char *name,
715 char *module_name, int *exported)
716 {
717 return -ERANGE;
718 }
719
720 static inline unsigned long module_kallsyms_lookup_name(const char *name)
721 {
722 return 0;
723 }
724
725 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
726 struct module *,
727 unsigned long),
728 void *data)
729 {
730 return 0;
731 }
732
733 static inline int register_module_notifier(struct notifier_block *nb)
734 {
735 /* no events will happen anyway, so this can always succeed */
736 return 0;
737 }
738
739 static inline int unregister_module_notifier(struct notifier_block *nb)
740 {
741 return 0;
742 }
743
744 #define module_put_and_exit(code) do_exit(code)
745
746 static inline void print_modules(void)
747 {
748 }
749
750 static inline bool module_requested_async_probing(struct module *module)
751 {
752 return false;
753 }
754
755 #endif /* CONFIG_MODULES */
756
757 #ifdef CONFIG_SYSFS
758 extern struct kset *module_kset;
759 extern struct kobj_type module_ktype;
760 extern int module_sysfs_initialized;
761 #endif /* CONFIG_SYSFS */
762
763 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
764
765 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
766
767 #define __MODULE_STRING(x) __stringify(x)
768
769 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
770 extern void set_all_modules_text_rw(void);
771 extern void set_all_modules_text_ro(void);
772 #else
773 static inline void set_all_modules_text_rw(void) { }
774 static inline void set_all_modules_text_ro(void) { }
775 #endif
776
777 #ifdef CONFIG_GENERIC_BUG
778 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
779 struct module *);
780 void module_bug_cleanup(struct module *);
781
782 #else /* !CONFIG_GENERIC_BUG */
783
784 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
785 const Elf_Shdr *sechdrs,
786 struct module *mod)
787 {
788 }
789 static inline void module_bug_cleanup(struct module *mod) {}
790 #endif /* CONFIG_GENERIC_BUG */
791
792 #ifdef RETPOLINE
793 extern bool retpoline_module_ok(bool has_retpoline);
794 #else
795 static inline bool retpoline_module_ok(bool has_retpoline)
796 {
797 return true;
798 }
799 #endif
800
801 #ifdef CONFIG_MODULE_SIG
802 static inline bool module_sig_ok(struct module *module)
803 {
804 return module->sig_ok;
805 }
806 #else /* !CONFIG_MODULE_SIG */
807 static inline bool module_sig_ok(struct module *module)
808 {
809 return true;
810 }
811 #endif /* CONFIG_MODULE_SIG */
812
813 #endif /* _LINUX_MODULE_H */
814
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.