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fb1c8f93 IM |
1 | #ifndef __LINUX_SPINLOCK_API_SMP_H |
2 | #define __LINUX_SPINLOCK_API_SMP_H | |
3 | ||
4 | #ifndef __LINUX_SPINLOCK_H | |
5 | # error "please don't include this file directly" | |
6 | #endif | |
7 | ||
8 | /* | |
9 | * include/linux/spinlock_api_smp.h | |
10 | * | |
11 | * spinlock API declarations on SMP (and debug) | |
12 | * (implemented in kernel/spinlock.c) | |
13 | * | |
14 | * portions Copyright 2005, Red Hat, Inc., Ingo Molnar | |
15 | * Released under the General Public License (GPL). | |
16 | */ | |
17 | ||
18 | int in_lock_functions(unsigned long addr); | |
19 | ||
20 | #define assert_spin_locked(x) BUG_ON(!spin_is_locked(x)) | |
21 | ||
9f50b93f | 22 | void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock); |
8a25d5de | 23 | void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass) |
9f50b93f | 24 | __acquires(lock); |
b7d39aff PZ |
25 | void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map) |
26 | __acquires(lock); | |
9f50b93f JT |
27 | void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock); |
28 | void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock); | |
29 | void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock); | |
30 | void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(lock); | |
31 | void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(lock); | |
32 | void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(lock); | |
33 | void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock); | |
34 | void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock); | |
fb1c8f93 | 35 | unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) |
9f50b93f | 36 | __acquires(lock); |
cfd3ef23 AV |
37 | unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass) |
38 | __acquires(lock); | |
fb1c8f93 | 39 | unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) |
9f50b93f | 40 | __acquires(lock); |
fb1c8f93 | 41 | unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) |
9f50b93f | 42 | __acquires(lock); |
fb1c8f93 IM |
43 | int __lockfunc _spin_trylock(spinlock_t *lock); |
44 | int __lockfunc _read_trylock(rwlock_t *lock); | |
45 | int __lockfunc _write_trylock(rwlock_t *lock); | |
46 | int __lockfunc _spin_trylock_bh(spinlock_t *lock); | |
9f50b93f JT |
47 | void __lockfunc _spin_unlock(spinlock_t *lock) __releases(lock); |
48 | void __lockfunc _read_unlock(rwlock_t *lock) __releases(lock); | |
49 | void __lockfunc _write_unlock(rwlock_t *lock) __releases(lock); | |
50 | void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(lock); | |
51 | void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(lock); | |
52 | void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(lock); | |
53 | void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(lock); | |
54 | void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(lock); | |
55 | void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(lock); | |
fb1c8f93 | 56 | void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) |
9f50b93f | 57 | __releases(lock); |
fb1c8f93 | 58 | void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) |
9f50b93f | 59 | __releases(lock); |
fb1c8f93 | 60 | void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) |
9f50b93f | 61 | __releases(lock); |
fb1c8f93 | 62 | |
bb7bed08 HC |
63 | /* |
64 | * We inline the unlock functions in the nondebug case: | |
65 | */ | |
66 | #if !defined(CONFIG_DEBUG_SPINLOCK) && !defined(CONFIG_PREEMPT) | |
67 | #define __always_inline__spin_unlock | |
68 | #define __always_inline__read_unlock | |
69 | #define __always_inline__write_unlock | |
70 | #define __always_inline__spin_unlock_irq | |
71 | #define __always_inline__read_unlock_irq | |
72 | #define __always_inline__write_unlock_irq | |
73 | #endif | |
74 | ||
892a7c67 HC |
75 | #ifndef CONFIG_DEBUG_SPINLOCK |
76 | #ifndef CONFIG_GENERIC_LOCKBREAK | |
77 | ||
78 | #ifdef __always_inline__spin_lock | |
79 | #define _spin_lock(lock) __spin_lock(lock) | |
80 | #endif | |
81 | ||
82 | #ifdef __always_inline__read_lock | |
83 | #define _read_lock(lock) __read_lock(lock) | |
84 | #endif | |
85 | ||
86 | #ifdef __always_inline__write_lock | |
87 | #define _write_lock(lock) __write_lock(lock) | |
88 | #endif | |
89 | ||
90 | #ifdef __always_inline__spin_lock_bh | |
91 | #define _spin_lock_bh(lock) __spin_lock_bh(lock) | |
92 | #endif | |
93 | ||
94 | #ifdef __always_inline__read_lock_bh | |
95 | #define _read_lock_bh(lock) __read_lock_bh(lock) | |
96 | #endif | |
97 | ||
98 | #ifdef __always_inline__write_lock_bh | |
99 | #define _write_lock_bh(lock) __write_lock_bh(lock) | |
100 | #endif | |
101 | ||
102 | #ifdef __always_inline__spin_lock_irq | |
103 | #define _spin_lock_irq(lock) __spin_lock_irq(lock) | |
104 | #endif | |
105 | ||
106 | #ifdef __always_inline__read_lock_irq | |
107 | #define _read_lock_irq(lock) __read_lock_irq(lock) | |
108 | #endif | |
109 | ||
110 | #ifdef __always_inline__write_lock_irq | |
111 | #define _write_lock_irq(lock) __write_lock_irq(lock) | |
112 | #endif | |
113 | ||
114 | #ifdef __always_inline__spin_lock_irqsave | |
115 | #define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock) | |
116 | #endif | |
117 | ||
118 | #ifdef __always_inline__read_lock_irqsave | |
119 | #define _read_lock_irqsave(lock) __read_lock_irqsave(lock) | |
120 | #endif | |
121 | ||
122 | #ifdef __always_inline__write_lock_irqsave | |
123 | #define _write_lock_irqsave(lock) __write_lock_irqsave(lock) | |
124 | #endif | |
125 | ||
126 | #endif /* !CONFIG_GENERIC_LOCKBREAK */ | |
127 | ||
128 | #ifdef __always_inline__spin_trylock | |
129 | #define _spin_trylock(lock) __spin_trylock(lock) | |
130 | #endif | |
131 | ||
132 | #ifdef __always_inline__read_trylock | |
133 | #define _read_trylock(lock) __read_trylock(lock) | |
134 | #endif | |
135 | ||
136 | #ifdef __always_inline__write_trylock | |
137 | #define _write_trylock(lock) __write_trylock(lock) | |
138 | #endif | |
139 | ||
140 | #ifdef __always_inline__spin_trylock_bh | |
141 | #define _spin_trylock_bh(lock) __spin_trylock_bh(lock) | |
142 | #endif | |
143 | ||
144 | #ifdef __always_inline__spin_unlock | |
145 | #define _spin_unlock(lock) __spin_unlock(lock) | |
146 | #endif | |
147 | ||
148 | #ifdef __always_inline__read_unlock | |
149 | #define _read_unlock(lock) __read_unlock(lock) | |
150 | #endif | |
151 | ||
152 | #ifdef __always_inline__write_unlock | |
153 | #define _write_unlock(lock) __write_unlock(lock) | |
154 | #endif | |
155 | ||
156 | #ifdef __always_inline__spin_unlock_bh | |
157 | #define _spin_unlock_bh(lock) __spin_unlock_bh(lock) | |
158 | #endif | |
159 | ||
160 | #ifdef __always_inline__read_unlock_bh | |
161 | #define _read_unlock_bh(lock) __read_unlock_bh(lock) | |
162 | #endif | |
163 | ||
164 | #ifdef __always_inline__write_unlock_bh | |
165 | #define _write_unlock_bh(lock) __write_unlock_bh(lock) | |
166 | #endif | |
167 | ||
168 | #ifdef __always_inline__spin_unlock_irq | |
169 | #define _spin_unlock_irq(lock) __spin_unlock_irq(lock) | |
170 | #endif | |
171 | ||
172 | #ifdef __always_inline__read_unlock_irq | |
173 | #define _read_unlock_irq(lock) __read_unlock_irq(lock) | |
174 | #endif | |
175 | ||
176 | #ifdef __always_inline__write_unlock_irq | |
177 | #define _write_unlock_irq(lock) __write_unlock_irq(lock) | |
178 | #endif | |
179 | ||
180 | #ifdef __always_inline__spin_unlock_irqrestore | |
181 | #define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags) | |
182 | #endif | |
183 | ||
184 | #ifdef __always_inline__read_unlock_irqrestore | |
185 | #define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags) | |
186 | #endif | |
187 | ||
188 | #ifdef __always_inline__write_unlock_irqrestore | |
189 | #define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags) | |
190 | #endif | |
191 | ||
192 | #endif /* CONFIG_DEBUG_SPINLOCK */ | |
193 | ||
69d0ee73 HC |
194 | static inline int __spin_trylock(spinlock_t *lock) |
195 | { | |
196 | preempt_disable(); | |
197 | if (_raw_spin_trylock(lock)) { | |
198 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
199 | return 1; | |
200 | } | |
201 | preempt_enable(); | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static inline int __read_trylock(rwlock_t *lock) | |
206 | { | |
207 | preempt_disable(); | |
208 | if (_raw_read_trylock(lock)) { | |
209 | rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_); | |
210 | return 1; | |
211 | } | |
212 | preempt_enable(); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static inline int __write_trylock(rwlock_t *lock) | |
217 | { | |
218 | preempt_disable(); | |
219 | if (_raw_write_trylock(lock)) { | |
220 | rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
221 | return 1; | |
222 | } | |
223 | preempt_enable(); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | /* | |
228 | * If lockdep is enabled then we use the non-preemption spin-ops | |
229 | * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are | |
230 | * not re-enabled during lock-acquire (which the preempt-spin-ops do): | |
231 | */ | |
232 | #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) | |
233 | ||
234 | static inline void __read_lock(rwlock_t *lock) | |
235 | { | |
236 | preempt_disable(); | |
237 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
238 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
239 | } | |
240 | ||
241 | static inline unsigned long __spin_lock_irqsave(spinlock_t *lock) | |
242 | { | |
243 | unsigned long flags; | |
244 | ||
245 | local_irq_save(flags); | |
246 | preempt_disable(); | |
247 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
248 | /* | |
249 | * On lockdep we dont want the hand-coded irq-enable of | |
250 | * _raw_spin_lock_flags() code, because lockdep assumes | |
251 | * that interrupts are not re-enabled during lock-acquire: | |
252 | */ | |
253 | #ifdef CONFIG_LOCKDEP | |
254 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
255 | #else | |
256 | _raw_spin_lock_flags(lock, &flags); | |
257 | #endif | |
258 | return flags; | |
259 | } | |
260 | ||
261 | static inline void __spin_lock_irq(spinlock_t *lock) | |
262 | { | |
263 | local_irq_disable(); | |
264 | preempt_disable(); | |
265 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
266 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
267 | } | |
268 | ||
269 | static inline void __spin_lock_bh(spinlock_t *lock) | |
270 | { | |
271 | local_bh_disable(); | |
272 | preempt_disable(); | |
273 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
274 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
275 | } | |
276 | ||
277 | static inline unsigned long __read_lock_irqsave(rwlock_t *lock) | |
278 | { | |
279 | unsigned long flags; | |
280 | ||
281 | local_irq_save(flags); | |
282 | preempt_disable(); | |
283 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
284 | LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock, | |
285 | _raw_read_lock_flags, &flags); | |
286 | return flags; | |
287 | } | |
288 | ||
289 | static inline void __read_lock_irq(rwlock_t *lock) | |
290 | { | |
291 | local_irq_disable(); | |
292 | preempt_disable(); | |
293 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
294 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
295 | } | |
296 | ||
297 | static inline void __read_lock_bh(rwlock_t *lock) | |
298 | { | |
299 | local_bh_disable(); | |
300 | preempt_disable(); | |
301 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
302 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
303 | } | |
304 | ||
305 | static inline unsigned long __write_lock_irqsave(rwlock_t *lock) | |
306 | { | |
307 | unsigned long flags; | |
308 | ||
309 | local_irq_save(flags); | |
310 | preempt_disable(); | |
311 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
312 | LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock, | |
313 | _raw_write_lock_flags, &flags); | |
314 | return flags; | |
315 | } | |
316 | ||
317 | static inline void __write_lock_irq(rwlock_t *lock) | |
318 | { | |
319 | local_irq_disable(); | |
320 | preempt_disable(); | |
321 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
322 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
323 | } | |
324 | ||
325 | static inline void __write_lock_bh(rwlock_t *lock) | |
326 | { | |
327 | local_bh_disable(); | |
328 | preempt_disable(); | |
329 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
330 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
331 | } | |
332 | ||
333 | static inline void __spin_lock(spinlock_t *lock) | |
334 | { | |
335 | preempt_disable(); | |
336 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
337 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
338 | } | |
339 | ||
340 | static inline void __write_lock(rwlock_t *lock) | |
341 | { | |
342 | preempt_disable(); | |
343 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
344 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
345 | } | |
346 | ||
347 | #endif /* CONFIG_PREEMPT */ | |
348 | ||
349 | static inline void __spin_unlock(spinlock_t *lock) | |
350 | { | |
351 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
352 | _raw_spin_unlock(lock); | |
353 | preempt_enable(); | |
354 | } | |
355 | ||
356 | static inline void __write_unlock(rwlock_t *lock) | |
357 | { | |
358 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
359 | _raw_write_unlock(lock); | |
360 | preempt_enable(); | |
361 | } | |
362 | ||
363 | static inline void __read_unlock(rwlock_t *lock) | |
364 | { | |
365 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
366 | _raw_read_unlock(lock); | |
367 | preempt_enable(); | |
368 | } | |
369 | ||
370 | static inline void __spin_unlock_irqrestore(spinlock_t *lock, | |
371 | unsigned long flags) | |
372 | { | |
373 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
374 | _raw_spin_unlock(lock); | |
375 | local_irq_restore(flags); | |
376 | preempt_enable(); | |
377 | } | |
378 | ||
379 | static inline void __spin_unlock_irq(spinlock_t *lock) | |
380 | { | |
381 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
382 | _raw_spin_unlock(lock); | |
383 | local_irq_enable(); | |
384 | preempt_enable(); | |
385 | } | |
386 | ||
387 | static inline void __spin_unlock_bh(spinlock_t *lock) | |
388 | { | |
389 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
390 | _raw_spin_unlock(lock); | |
391 | preempt_enable_no_resched(); | |
392 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
393 | } | |
394 | ||
395 | static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) | |
396 | { | |
397 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
398 | _raw_read_unlock(lock); | |
399 | local_irq_restore(flags); | |
400 | preempt_enable(); | |
401 | } | |
402 | ||
403 | static inline void __read_unlock_irq(rwlock_t *lock) | |
404 | { | |
405 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
406 | _raw_read_unlock(lock); | |
407 | local_irq_enable(); | |
408 | preempt_enable(); | |
409 | } | |
410 | ||
411 | static inline void __read_unlock_bh(rwlock_t *lock) | |
412 | { | |
413 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
414 | _raw_read_unlock(lock); | |
415 | preempt_enable_no_resched(); | |
416 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
417 | } | |
418 | ||
419 | static inline void __write_unlock_irqrestore(rwlock_t *lock, | |
420 | unsigned long flags) | |
421 | { | |
422 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
423 | _raw_write_unlock(lock); | |
424 | local_irq_restore(flags); | |
425 | preempt_enable(); | |
426 | } | |
427 | ||
428 | static inline void __write_unlock_irq(rwlock_t *lock) | |
429 | { | |
430 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
431 | _raw_write_unlock(lock); | |
432 | local_irq_enable(); | |
433 | preempt_enable(); | |
434 | } | |
435 | ||
436 | static inline void __write_unlock_bh(rwlock_t *lock) | |
437 | { | |
438 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
439 | _raw_write_unlock(lock); | |
440 | preempt_enable_no_resched(); | |
441 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
442 | } | |
443 | ||
444 | static inline int __spin_trylock_bh(spinlock_t *lock) | |
445 | { | |
446 | local_bh_disable(); | |
447 | preempt_disable(); | |
448 | if (_raw_spin_trylock(lock)) { | |
449 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
450 | return 1; | |
451 | } | |
452 | preempt_enable_no_resched(); | |
453 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
454 | return 0; | |
455 | } | |
456 | ||
fb1c8f93 | 457 | #endif /* __LINUX_SPINLOCK_API_SMP_H */ |