1 #ifndef __LINUX_RWLOCK_API_SMP_H
2 #define __LINUX_RWLOCK_API_SMP_H
4 #ifndef __LINUX_SPINLOCK_API_SMP_H
5 # error "please don't include this file directly"
9 * include/linux/rwlock_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 void __lockfunc
_raw_read_lock(rwlock_t
*lock
) __acquires(lock
);
19 void __lockfunc
_raw_write_lock(rwlock_t
*lock
) __acquires(lock
);
20 void __lockfunc
_raw_read_lock_bh(rwlock_t
*lock
) __acquires(lock
);
21 void __lockfunc
_raw_write_lock_bh(rwlock_t
*lock
) __acquires(lock
);
22 void __lockfunc
_raw_read_lock_irq(rwlock_t
*lock
) __acquires(lock
);
23 void __lockfunc
_raw_write_lock_irq(rwlock_t
*lock
) __acquires(lock
);
24 unsigned long __lockfunc
_raw_read_lock_irqsave(rwlock_t
*lock
)
26 unsigned long __lockfunc
_raw_write_lock_irqsave(rwlock_t
*lock
)
28 int __lockfunc
_raw_read_trylock(rwlock_t
*lock
);
29 int __lockfunc
_raw_write_trylock(rwlock_t
*lock
);
30 void __lockfunc
_raw_read_unlock(rwlock_t
*lock
) __releases(lock
);
31 void __lockfunc
_raw_write_unlock(rwlock_t
*lock
) __releases(lock
);
32 void __lockfunc
_raw_read_unlock_bh(rwlock_t
*lock
) __releases(lock
);
33 void __lockfunc
_raw_write_unlock_bh(rwlock_t
*lock
) __releases(lock
);
34 void __lockfunc
_raw_read_unlock_irq(rwlock_t
*lock
) __releases(lock
);
35 void __lockfunc
_raw_write_unlock_irq(rwlock_t
*lock
) __releases(lock
);
37 _raw_read_unlock_irqrestore(rwlock_t
*lock
, unsigned long flags
)
40 _raw_write_unlock_irqrestore(rwlock_t
*lock
, unsigned long flags
)
43 #ifdef CONFIG_INLINE_READ_LOCK
44 #define _raw_read_lock(lock) __raw_read_lock(lock)
47 #ifdef CONFIG_INLINE_WRITE_LOCK
48 #define _raw_write_lock(lock) __raw_write_lock(lock)
51 #ifdef CONFIG_INLINE_READ_LOCK_BH
52 #define _raw_read_lock_bh(lock) __raw_read_lock_bh(lock)
55 #ifdef CONFIG_INLINE_WRITE_LOCK_BH
56 #define _raw_write_lock_bh(lock) __raw_write_lock_bh(lock)
59 #ifdef CONFIG_INLINE_READ_LOCK_IRQ
60 #define _raw_read_lock_irq(lock) __raw_read_lock_irq(lock)
63 #ifdef CONFIG_INLINE_WRITE_LOCK_IRQ
64 #define _raw_write_lock_irq(lock) __raw_write_lock_irq(lock)
67 #ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE
68 #define _raw_read_lock_irqsave(lock) __raw_read_lock_irqsave(lock)
71 #ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
72 #define _raw_write_lock_irqsave(lock) __raw_write_lock_irqsave(lock)
75 #ifdef CONFIG_INLINE_READ_TRYLOCK
76 #define _raw_read_trylock(lock) __raw_read_trylock(lock)
79 #ifdef CONFIG_INLINE_WRITE_TRYLOCK
80 #define _raw_write_trylock(lock) __raw_write_trylock(lock)
83 #ifdef CONFIG_INLINE_READ_UNLOCK
84 #define _raw_read_unlock(lock) __raw_read_unlock(lock)
87 #ifdef CONFIG_INLINE_WRITE_UNLOCK
88 #define _raw_write_unlock(lock) __raw_write_unlock(lock)
91 #ifdef CONFIG_INLINE_READ_UNLOCK_BH
92 #define _raw_read_unlock_bh(lock) __raw_read_unlock_bh(lock)
95 #ifdef CONFIG_INLINE_WRITE_UNLOCK_BH
96 #define _raw_write_unlock_bh(lock) __raw_write_unlock_bh(lock)
99 #ifdef CONFIG_INLINE_READ_UNLOCK_IRQ
100 #define _raw_read_unlock_irq(lock) __raw_read_unlock_irq(lock)
103 #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ
104 #define _raw_write_unlock_irq(lock) __raw_write_unlock_irq(lock)
107 #ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
108 #define _raw_read_unlock_irqrestore(lock, flags) \
109 __raw_read_unlock_irqrestore(lock, flags)
112 #ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
113 #define _raw_write_unlock_irqrestore(lock, flags) \
114 __raw_write_unlock_irqrestore(lock, flags)
117 static inline int __raw_read_trylock(rwlock_t
*lock
)
120 if (do_raw_read_trylock(lock
)) {
121 rwlock_acquire_read(&lock
->dep_map
, 0, 1, _RET_IP_
);
128 static inline int __raw_write_trylock(rwlock_t
*lock
)
131 if (do_raw_write_trylock(lock
)) {
132 rwlock_acquire(&lock
->dep_map
, 0, 1, _RET_IP_
);
140 * If lockdep is enabled then we use the non-preemption spin-ops
141 * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
142 * not re-enabled during lock-acquire (which the preempt-spin-ops do):
144 #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
146 static inline void __raw_read_lock(rwlock_t
*lock
)
149 rwlock_acquire_read(&lock
->dep_map
, 0, 0, _RET_IP_
);
150 LOCK_CONTENDED(lock
, do_raw_read_trylock
, do_raw_read_lock
);
153 static inline unsigned long __raw_read_lock_irqsave(rwlock_t
*lock
)
157 local_irq_save(flags
);
159 rwlock_acquire_read(&lock
->dep_map
, 0, 0, _RET_IP_
);
160 LOCK_CONTENDED_FLAGS(lock
, do_raw_read_trylock
, do_raw_read_lock
,
161 do_raw_read_lock_flags
, &flags
);
165 static inline void __raw_read_lock_irq(rwlock_t
*lock
)
169 rwlock_acquire_read(&lock
->dep_map
, 0, 0, _RET_IP_
);
170 LOCK_CONTENDED(lock
, do_raw_read_trylock
, do_raw_read_lock
);
173 static inline void __raw_read_lock_bh(rwlock_t
*lock
)
177 rwlock_acquire_read(&lock
->dep_map
, 0, 0, _RET_IP_
);
178 LOCK_CONTENDED(lock
, do_raw_read_trylock
, do_raw_read_lock
);
181 static inline unsigned long __raw_write_lock_irqsave(rwlock_t
*lock
)
185 local_irq_save(flags
);
187 rwlock_acquire(&lock
->dep_map
, 0, 0, _RET_IP_
);
188 LOCK_CONTENDED_FLAGS(lock
, do_raw_write_trylock
, do_raw_write_lock
,
189 do_raw_write_lock_flags
, &flags
);
193 static inline void __raw_write_lock_irq(rwlock_t
*lock
)
197 rwlock_acquire(&lock
->dep_map
, 0, 0, _RET_IP_
);
198 LOCK_CONTENDED(lock
, do_raw_write_trylock
, do_raw_write_lock
);
201 static inline void __raw_write_lock_bh(rwlock_t
*lock
)
205 rwlock_acquire(&lock
->dep_map
, 0, 0, _RET_IP_
);
206 LOCK_CONTENDED(lock
, do_raw_write_trylock
, do_raw_write_lock
);
209 static inline void __raw_write_lock(rwlock_t
*lock
)
212 rwlock_acquire(&lock
->dep_map
, 0, 0, _RET_IP_
);
213 LOCK_CONTENDED(lock
, do_raw_write_trylock
, do_raw_write_lock
);
216 #endif /* CONFIG_PREEMPT */
218 static inline void __raw_write_unlock(rwlock_t
*lock
)
220 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
221 do_raw_write_unlock(lock
);
225 static inline void __raw_read_unlock(rwlock_t
*lock
)
227 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
228 do_raw_read_unlock(lock
);
233 __raw_read_unlock_irqrestore(rwlock_t
*lock
, unsigned long flags
)
235 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
236 do_raw_read_unlock(lock
);
237 local_irq_restore(flags
);
241 static inline void __raw_read_unlock_irq(rwlock_t
*lock
)
243 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
244 do_raw_read_unlock(lock
);
249 static inline void __raw_read_unlock_bh(rwlock_t
*lock
)
251 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
252 do_raw_read_unlock(lock
);
253 preempt_enable_no_resched();
254 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
257 static inline void __raw_write_unlock_irqrestore(rwlock_t
*lock
,
260 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
261 do_raw_write_unlock(lock
);
262 local_irq_restore(flags
);
266 static inline void __raw_write_unlock_irq(rwlock_t
*lock
)
268 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
269 do_raw_write_unlock(lock
);
274 static inline void __raw_write_unlock_bh(rwlock_t
*lock
)
276 rwlock_release(&lock
->dep_map
, 1, _RET_IP_
);
277 do_raw_write_unlock(lock
);
278 preempt_enable_no_resched();
279 local_bh_enable_ip((unsigned long)__builtin_return_address(0));
282 #endif /* __LINUX_RWLOCK_API_SMP_H */
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