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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 | |
69d0ee73 HC |
63 | static inline int __spin_trylock(spinlock_t *lock) |
64 | { | |
65 | preempt_disable(); | |
66 | if (_raw_spin_trylock(lock)) { | |
67 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
68 | return 1; | |
69 | } | |
70 | preempt_enable(); | |
71 | return 0; | |
72 | } | |
73 | ||
74 | static inline int __read_trylock(rwlock_t *lock) | |
75 | { | |
76 | preempt_disable(); | |
77 | if (_raw_read_trylock(lock)) { | |
78 | rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_); | |
79 | return 1; | |
80 | } | |
81 | preempt_enable(); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static inline int __write_trylock(rwlock_t *lock) | |
86 | { | |
87 | preempt_disable(); | |
88 | if (_raw_write_trylock(lock)) { | |
89 | rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
90 | return 1; | |
91 | } | |
92 | preempt_enable(); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | /* | |
97 | * If lockdep is enabled then we use the non-preemption spin-ops | |
98 | * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are | |
99 | * not re-enabled during lock-acquire (which the preempt-spin-ops do): | |
100 | */ | |
101 | #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) | |
102 | ||
103 | static inline void __read_lock(rwlock_t *lock) | |
104 | { | |
105 | preempt_disable(); | |
106 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
107 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
108 | } | |
109 | ||
110 | static inline unsigned long __spin_lock_irqsave(spinlock_t *lock) | |
111 | { | |
112 | unsigned long flags; | |
113 | ||
114 | local_irq_save(flags); | |
115 | preempt_disable(); | |
116 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
117 | /* | |
118 | * On lockdep we dont want the hand-coded irq-enable of | |
119 | * _raw_spin_lock_flags() code, because lockdep assumes | |
120 | * that interrupts are not re-enabled during lock-acquire: | |
121 | */ | |
122 | #ifdef CONFIG_LOCKDEP | |
123 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
124 | #else | |
125 | _raw_spin_lock_flags(lock, &flags); | |
126 | #endif | |
127 | return flags; | |
128 | } | |
129 | ||
130 | static inline void __spin_lock_irq(spinlock_t *lock) | |
131 | { | |
132 | local_irq_disable(); | |
133 | preempt_disable(); | |
134 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
135 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
136 | } | |
137 | ||
138 | static inline void __spin_lock_bh(spinlock_t *lock) | |
139 | { | |
140 | local_bh_disable(); | |
141 | preempt_disable(); | |
142 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
143 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
144 | } | |
145 | ||
146 | static inline unsigned long __read_lock_irqsave(rwlock_t *lock) | |
147 | { | |
148 | unsigned long flags; | |
149 | ||
150 | local_irq_save(flags); | |
151 | preempt_disable(); | |
152 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
153 | LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock, | |
154 | _raw_read_lock_flags, &flags); | |
155 | return flags; | |
156 | } | |
157 | ||
158 | static inline void __read_lock_irq(rwlock_t *lock) | |
159 | { | |
160 | local_irq_disable(); | |
161 | preempt_disable(); | |
162 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
163 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
164 | } | |
165 | ||
166 | static inline void __read_lock_bh(rwlock_t *lock) | |
167 | { | |
168 | local_bh_disable(); | |
169 | preempt_disable(); | |
170 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | |
171 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | |
172 | } | |
173 | ||
174 | static inline unsigned long __write_lock_irqsave(rwlock_t *lock) | |
175 | { | |
176 | unsigned long flags; | |
177 | ||
178 | local_irq_save(flags); | |
179 | preempt_disable(); | |
180 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
181 | LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock, | |
182 | _raw_write_lock_flags, &flags); | |
183 | return flags; | |
184 | } | |
185 | ||
186 | static inline void __write_lock_irq(rwlock_t *lock) | |
187 | { | |
188 | local_irq_disable(); | |
189 | preempt_disable(); | |
190 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
191 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
192 | } | |
193 | ||
194 | static inline void __write_lock_bh(rwlock_t *lock) | |
195 | { | |
196 | local_bh_disable(); | |
197 | preempt_disable(); | |
198 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
199 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
200 | } | |
201 | ||
202 | static inline void __spin_lock(spinlock_t *lock) | |
203 | { | |
204 | preempt_disable(); | |
205 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
206 | LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock); | |
207 | } | |
208 | ||
209 | static inline void __write_lock(rwlock_t *lock) | |
210 | { | |
211 | preempt_disable(); | |
212 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
213 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | |
214 | } | |
215 | ||
216 | #endif /* CONFIG_PREEMPT */ | |
217 | ||
218 | static inline void __spin_unlock(spinlock_t *lock) | |
219 | { | |
220 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
221 | _raw_spin_unlock(lock); | |
222 | preempt_enable(); | |
223 | } | |
224 | ||
225 | static inline void __write_unlock(rwlock_t *lock) | |
226 | { | |
227 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
228 | _raw_write_unlock(lock); | |
229 | preempt_enable(); | |
230 | } | |
231 | ||
232 | static inline void __read_unlock(rwlock_t *lock) | |
233 | { | |
234 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
235 | _raw_read_unlock(lock); | |
236 | preempt_enable(); | |
237 | } | |
238 | ||
239 | static inline void __spin_unlock_irqrestore(spinlock_t *lock, | |
240 | unsigned long flags) | |
241 | { | |
242 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
243 | _raw_spin_unlock(lock); | |
244 | local_irq_restore(flags); | |
245 | preempt_enable(); | |
246 | } | |
247 | ||
248 | static inline void __spin_unlock_irq(spinlock_t *lock) | |
249 | { | |
250 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
251 | _raw_spin_unlock(lock); | |
252 | local_irq_enable(); | |
253 | preempt_enable(); | |
254 | } | |
255 | ||
256 | static inline void __spin_unlock_bh(spinlock_t *lock) | |
257 | { | |
258 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
259 | _raw_spin_unlock(lock); | |
260 | preempt_enable_no_resched(); | |
261 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
262 | } | |
263 | ||
264 | static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) | |
265 | { | |
266 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
267 | _raw_read_unlock(lock); | |
268 | local_irq_restore(flags); | |
269 | preempt_enable(); | |
270 | } | |
271 | ||
272 | static inline void __read_unlock_irq(rwlock_t *lock) | |
273 | { | |
274 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
275 | _raw_read_unlock(lock); | |
276 | local_irq_enable(); | |
277 | preempt_enable(); | |
278 | } | |
279 | ||
280 | static inline void __read_unlock_bh(rwlock_t *lock) | |
281 | { | |
282 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
283 | _raw_read_unlock(lock); | |
284 | preempt_enable_no_resched(); | |
285 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
286 | } | |
287 | ||
288 | static inline void __write_unlock_irqrestore(rwlock_t *lock, | |
289 | unsigned long flags) | |
290 | { | |
291 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
292 | _raw_write_unlock(lock); | |
293 | local_irq_restore(flags); | |
294 | preempt_enable(); | |
295 | } | |
296 | ||
297 | static inline void __write_unlock_irq(rwlock_t *lock) | |
298 | { | |
299 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
300 | _raw_write_unlock(lock); | |
301 | local_irq_enable(); | |
302 | preempt_enable(); | |
303 | } | |
304 | ||
305 | static inline void __write_unlock_bh(rwlock_t *lock) | |
306 | { | |
307 | rwlock_release(&lock->dep_map, 1, _RET_IP_); | |
308 | _raw_write_unlock(lock); | |
309 | preempt_enable_no_resched(); | |
310 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
311 | } | |
312 | ||
313 | static inline int __spin_trylock_bh(spinlock_t *lock) | |
314 | { | |
315 | local_bh_disable(); | |
316 | preempt_disable(); | |
317 | if (_raw_spin_trylock(lock)) { | |
318 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); | |
319 | return 1; | |
320 | } | |
321 | preempt_enable_no_resched(); | |
322 | local_bh_enable_ip((unsigned long)__builtin_return_address(0)); | |
323 | return 0; | |
324 | } | |
325 | ||
fb1c8f93 | 326 | #endif /* __LINUX_SPINLOCK_API_SMP_H */ |