1 #ifndef __LINUX_SPINLOCK_RT_H
2 #define __LINUX_SPINLOCK_RT_H
4 #ifndef __LINUX_SPINLOCK_H
5 #error Do not include directly. Use spinlock.h
11 __rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key);
13 #define spin_lock_init(slock) \
15 static struct lock_class_key __key; \
17 rt_mutex_init(&(slock)->lock); \
18 __rt_spin_lock_init(slock, #slock, &__key); \
21 void __lockfunc rt_spin_lock__no_mg(spinlock_t *lock);
22 void __lockfunc rt_spin_unlock__no_mg(spinlock_t *lock);
23 int __lockfunc rt_spin_trylock__no_mg(spinlock_t *lock);
25 extern void __lockfunc rt_spin_lock(spinlock_t *lock);
26 extern unsigned long __lockfunc rt_spin_lock_trace_flags(spinlock_t *lock);
27 extern void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass);
28 extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
29 extern void __lockfunc rt_spin_unlock_wait(spinlock_t *lock);
30 extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags);
31 extern int __lockfunc rt_spin_trylock_bh(spinlock_t *lock);
32 extern int __lockfunc rt_spin_trylock(spinlock_t *lock);
33 extern int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock);
36 * lockdep-less calls, for derived types like rwlock:
37 * (for trylock they can use rt_mutex_trylock() directly.
39 extern void __lockfunc __rt_spin_lock__no_mg(struct rt_mutex *lock);
40 extern void __lockfunc __rt_spin_lock(struct rt_mutex *lock);
41 extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
42 extern int __lockfunc __rt_spin_trylock(struct rt_mutex *lock);
44 #define spin_lock(lock) rt_spin_lock(lock)
46 #define spin_lock_bh(lock) \
52 #define spin_lock_irq(lock) spin_lock(lock)
54 #define spin_do_trylock(lock) __cond_lock(lock, rt_spin_trylock(lock))
56 #define spin_trylock(lock) \
59 __locked = spin_do_trylock(lock); \
64 # define spin_lock_nested(lock, subclass) \
66 rt_spin_lock_nested(lock, subclass); \
69 #define spin_lock_bh_nested(lock, subclass) \
72 rt_spin_lock_nested(lock, subclass); \
75 # define spin_lock_irqsave_nested(lock, flags, subclass) \
77 typecheck(unsigned long, flags); \
79 rt_spin_lock_nested(lock, subclass); \
82 # define spin_lock_nested(lock, subclass) spin_lock(lock)
83 # define spin_lock_bh_nested(lock, subclass) spin_lock_bh(lock)
85 # define spin_lock_irqsave_nested(lock, flags, subclass) \
87 typecheck(unsigned long, flags); \
93 #define spin_lock_irqsave(lock, flags) \
95 typecheck(unsigned long, flags); \
100 static inline unsigned long spin_lock_trace_flags(spinlock_t *lock)
102 unsigned long flags = 0;
103 #ifdef CONFIG_TRACE_IRQFLAGS
104 flags = rt_spin_lock_trace_flags(lock);
106 spin_lock(lock); /* lock_local */
111 /* FIXME: we need rt_spin_lock_nest_lock */
112 #define spin_lock_nest_lock(lock, nest_lock) spin_lock_nested(lock, 0)
114 #define spin_unlock(lock) rt_spin_unlock(lock)
116 #define spin_unlock_bh(lock) \
118 rt_spin_unlock(lock); \
122 #define spin_unlock_irq(lock) spin_unlock(lock)
124 #define spin_unlock_irqrestore(lock, flags) \
126 typecheck(unsigned long, flags); \
131 #define spin_trylock_bh(lock) __cond_lock(lock, rt_spin_trylock_bh(lock))
132 #define spin_trylock_irq(lock) spin_trylock(lock)
134 #define spin_trylock_irqsave(lock, flags) \
135 rt_spin_trylock_irqsave(lock, &(flags))
137 #define spin_unlock_wait(lock) rt_spin_unlock_wait(lock)
139 #ifdef CONFIG_GENERIC_LOCKBREAK
140 # define spin_is_contended(lock) ((lock)->break_lock)
142 # define spin_is_contended(lock) (((void)(lock), 0))
145 static inline int spin_can_lock(spinlock_t *lock)
147 return !rt_mutex_is_locked(&lock->lock);
150 static inline int spin_is_locked(spinlock_t *lock)
152 return rt_mutex_is_locked(&lock->lock);
155 static inline void assert_spin_locked(spinlock_t *lock)
157 BUG_ON(!spin_is_locked(lock));
160 #define atomic_dec_and_lock(atomic, lock) \
161 atomic_dec_and_spin_lock(atomic, lock)