1 #ifndef __LINUX_SPINLOCK_API_SMP_H
2 #define __LINUX_SPINLOCK_API_SMP_H
4 #ifndef __LINUX_SPINLOCK_H
5 # error "please don't include this file directly"
9 * include/linux/spinlock_api_smp.h
11 * spinlock API declarations on SMP (and debug)
12 * (implemented in kernel/spinlock.c)
14 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
15 * Released under the General Public License (GPL).
18 int in_lock_functions(unsigned long addr);
20 #define assert_spin_locked(x) BUG_ON(!spin_is_locked(x))
22 void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock);
23 void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
25 void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
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);
35 unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
37 unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
39 unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
41 unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
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);
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);
56 void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
58 void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
60 void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
63 #ifndef CONFIG_DEBUG_SPINLOCK
64 #ifndef CONFIG_GENERIC_LOCKBREAK
66 #ifdef __always_inline__spin_lock
67 #define _spin_lock(lock) __spin_lock(lock)
70 #ifdef __always_inline__read_lock
71 #define _read_lock(lock) __read_lock(lock)
74 #ifdef __always_inline__write_lock
75 #define _write_lock(lock) __write_lock(lock)
78 #ifdef __always_inline__spin_lock_bh
79 #define _spin_lock_bh(lock) __spin_lock_bh(lock)
82 #ifdef __always_inline__read_lock_bh
83 #define _read_lock_bh(lock) __read_lock_bh(lock)
86 #ifdef __always_inline__write_lock_bh
87 #define _write_lock_bh(lock) __write_lock_bh(lock)
90 #ifdef __always_inline__spin_lock_irq
91 #define _spin_lock_irq(lock) __spin_lock_irq(lock)
94 #ifdef __always_inline__read_lock_irq
95 #define _read_lock_irq(lock) __read_lock_irq(lock)
98 #ifdef __always_inline__write_lock_irq
99 #define _write_lock_irq(lock) __write_lock_irq(lock)
102 #ifdef __always_inline__spin_lock_irqsave
103 #define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock)
106 #ifdef __always_inline__read_lock_irqsave
107 #define _read_lock_irqsave(lock) __read_lock_irqsave(lock)
110 #ifdef __always_inline__write_lock_irqsave
111 #define _write_lock_irqsave(lock) __write_lock_irqsave(lock)
114 #endif /* !CONFIG_GENERIC_LOCKBREAK */
116 #ifdef __always_inline__spin_trylock
117 #define _spin_trylock(lock) __spin_trylock(lock)
120 #ifdef __always_inline__read_trylock
121 #define _read_trylock(lock) __read_trylock(lock)
124 #ifdef __always_inline__write_trylock
125 #define _write_trylock(lock) __write_trylock(lock)
128 #ifdef __always_inline__spin_trylock_bh
129 #define _spin_trylock_bh(lock) __spin_trylock_bh(lock)
132 #ifdef __always_inline__spin_unlock
133 #define _spin_unlock(lock) __spin_unlock(lock)
136 #ifdef __always_inline__read_unlock
137 #define _read_unlock(lock) __read_unlock(lock)
140 #ifdef __always_inline__write_unlock
141 #define _write_unlock(lock) __write_unlock(lock)
144 #ifdef __always_inline__spin_unlock_bh
145 #define _spin_unlock_bh(lock) __spin_unlock_bh(lock)
148 #ifdef __always_inline__read_unlock_bh
149 #define _read_unlock_bh(lock) __read_unlock_bh(lock)
152 #ifdef __always_inline__write_unlock_bh
153 #define _write_unlock_bh(lock) __write_unlock_bh(lock)
156 #ifdef __always_inline__spin_unlock_irq
157 #define _spin_unlock_irq(lock) __spin_unlock_irq(lock)
160 #ifdef __always_inline__read_unlock_irq
161 #define _read_unlock_irq(lock) __read_unlock_irq(lock)
164 #ifdef __always_inline__write_unlock_irq
165 #define _write_unlock_irq(lock) __write_unlock_irq(lock)
168 #ifdef __always_inline__spin_unlock_irqrestore
169 #define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags)
172 #ifdef __always_inline__read_unlock_irqrestore
173 #define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags)
176 #ifdef __always_inline__write_unlock_irqrestore
177 #define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags)
180 #endif /* CONFIG_DEBUG_SPINLOCK */
182 static inline int __spin_trylock(spinlock_t *lock)
185 if (_raw_spin_trylock(lock)) {
186 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
193 static inline int __read_trylock(rwlock_t *lock)
196 if (_raw_read_trylock(lock)) {
197 rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
204 static inline int __write_trylock(rwlock_t *lock)
207 if (_raw_write_trylock(lock)) {
208 rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_);
216 * If lockdep is enabled then we use the non-preemption spin-ops
217 * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
218 * not re-enabled during lock-acquire (which the preempt-spin-ops do):
220 #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
222 static inline void __read_lock(rwlock_t *lock)
225 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
226 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
229 static inline unsigned long __spin_lock_irqsave(spinlock_t *lock)
233 local_irq_save(flags);
235 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
237 * On lockdep we dont want the hand-coded irq-enable of
238 * _raw_spin_lock_flags() code, because lockdep assumes
239 * that interrupts are not re-enabled during lock-acquire:
241 #ifdef CONFIG_LOCKDEP
242 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
244 _raw_spin_lock_flags(lock, &flags);
249 static inline void __spin_lock_irq(spinlock_t *lock)
253 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
254 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
257 static inline void __spin_lock_bh(spinlock_t *lock)
261 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
262 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
265 static inline unsigned long __read_lock_irqsave(rwlock_t *lock)
269 local_irq_save(flags);
271 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
272 LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
273 _raw_read_lock_flags, &flags);
277 static inline void __read_lock_irq(rwlock_t *lock)
281 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
282 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
285 static inline void __read_lock_bh(rwlock_t *lock)
289 rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
290 LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
293 static inline unsigned long __write_lock_irqsave(rwlock_t *lock)
297 local_irq_save(flags);
299 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
300 LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
301 _raw_write_lock_flags, &flags);
305 static inline void __write_lock_irq(rwlock_t *lock)
309 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
310 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
313 static inline void __write_lock_bh(rwlock_t *lock)
317 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
318 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
321 static inline void __spin_lock(spinlock_t *lock)
324 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
325 LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
328 static inline void __write_lock(rwlock_t *lock)
331 rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
332 LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
335 #endif /* CONFIG_PREEMPT */
337 static inline void __spin_unlock(spinlock_t *lock)
339 spin_release(&lock->dep_map, 1, _RET_IP_);
340 _raw_spin_unlock(lock);
344 static inline void __write_unlock(rwlock_t *lock)
346 rwlock_release(&lock->dep_map, 1, _RET_IP_);
347 _raw_write_unlock(lock);
351 static inline void __read_unlock(rwlock_t *lock)
353 rwlock_release(&lock->dep_map, 1, _RET_IP_);
354 _raw_read_unlock(lock);
358 static inline void __spin_unlock_irqrestore(spinlock_t *lock,
361 spin_release(&lock->dep_map, 1, _RET_IP_);
362 _raw_spin_unlock(lock);
363 local_irq_restore(flags);
367 static inline void __spin_unlock_irq(spinlock_t *lock)
369 spin_release(&lock->dep_map, 1, _RET_IP_);
370 _raw_spin_unlock(lock);
375 static inline void __spin_unlock_bh(spinlock_t *lock)
377 spin_release(&lock->dep_map, 1, _RET_IP_);
378 _raw_spin_unlock(lock);
379 preempt_enable_no_resched();
380 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
383 static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
385 rwlock_release(&lock->dep_map, 1, _RET_IP_);
386 _raw_read_unlock(lock);
387 local_irq_restore(flags);
391 static inline void __read_unlock_irq(rwlock_t *lock)
393 rwlock_release(&lock->dep_map, 1, _RET_IP_);
394 _raw_read_unlock(lock);
399 static inline void __read_unlock_bh(rwlock_t *lock)
401 rwlock_release(&lock->dep_map, 1, _RET_IP_);
402 _raw_read_unlock(lock);
403 preempt_enable_no_resched();
404 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
407 static inline void __write_unlock_irqrestore(rwlock_t *lock,
410 rwlock_release(&lock->dep_map, 1, _RET_IP_);
411 _raw_write_unlock(lock);
412 local_irq_restore(flags);
416 static inline void __write_unlock_irq(rwlock_t *lock)
418 rwlock_release(&lock->dep_map, 1, _RET_IP_);
419 _raw_write_unlock(lock);
424 static inline void __write_unlock_bh(rwlock_t *lock)
426 rwlock_release(&lock->dep_map, 1, _RET_IP_);
427 _raw_write_unlock(lock);
428 preempt_enable_no_resched();
429 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
432 static inline int __spin_trylock_bh(spinlock_t *lock)
436 if (_raw_spin_trylock(lock)) {
437 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
440 preempt_enable_no_resched();
441 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
445 #endif /* __LINUX_SPINLOCK_API_SMP_H */