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#ifndef __LINUX_SPINLOCK_RT_H
#define __LINUX_SPINLOCK_RT_H
#ifndef __LINUX_SPINLOCK_H
#error Do not include directly. Use spinlock.h
#endif
extern void
__rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key);
#define spin_lock_init(slock) \
do { \
static struct lock_class_key __key; \
\
rt_mutex_init(&(slock)->lock); \
__rt_spin_lock_init(slock, #slock, &__key); \
} while (0)
extern void __lockfunc rt_spin_lock(spinlock_t *lock);
extern unsigned long __lockfunc rt_spin_lock_trace_flags(spinlock_t *lock);
extern void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass);
extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
extern void __lockfunc rt_spin_unlock_wait(spinlock_t *lock);
extern int __lockfunc rt_spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags);
extern int __lockfunc rt_spin_trylock_bh(spinlock_t *lock);
extern int __lockfunc rt_spin_trylock(spinlock_t *lock);
extern int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock);
/*
* lockdep-less calls, for derived types like rwlock:
* (for trylock they can use rt_mutex_trylock() directly.
*/
extern void __lockfunc __rt_spin_lock(struct rt_mutex *lock);
extern void __lockfunc __rt_spin_unlock(struct rt_mutex *lock);
#define spin_lock_local(lock) rt_spin_lock(lock)
#define spin_unlock_local(lock) rt_spin_unlock(lock)
#define spin_lock(lock) \
do { \
migrate_disable(); \
rt_spin_lock(lock); \
} while (0)
#define spin_lock_bh(lock) \
do { \
local_bh_disable(); \
migrate_disable(); \
rt_spin_lock(lock); \
} while (0)
#define spin_lock_irq(lock) spin_lock(lock)
#define spin_do_trylock(lock) __cond_lock(lock, rt_spin_trylock(lock))
#define spin_trylock(lock) \
({ \
int __locked; \
migrate_disable(); \
__locked = spin_do_trylock(lock); \
if (!__locked) \
migrate_enable(); \
__locked; \
})
#ifdef CONFIG_LOCKDEP
# define spin_lock_nested(lock, subclass) \
do { \
migrate_disable(); \
rt_spin_lock_nested(lock, subclass); \
} while (0)
# define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
typecheck(unsigned long, flags); \
flags = 0; \
migrate_disable(); \
rt_spin_lock_nested(lock, subclass); \
} while (0)
#else
# define spin_lock_nested(lock, subclass) spin_lock(lock)
# define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
typecheck(unsigned long, flags); \
flags = 0; \
spin_lock(lock); \
} while (0)
#endif
#define spin_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = 0; \
spin_lock(lock); \
} while (0)
static inline unsigned long spin_lock_trace_flags(spinlock_t *lock)
{
unsigned long flags = 0;
#ifdef CONFIG_TRACE_IRQFLAGS
flags = rt_spin_lock_trace_flags(lock);
#else
spin_lock(lock); /* lock_local */
#endif
return flags;
}
/* FIXME: we need rt_spin_lock_nest_lock */
#define spin_lock_nest_lock(lock, nest_lock) spin_lock_nested(lock, 0)
#define spin_unlock(lock) \
do { \
rt_spin_unlock(lock); \
migrate_enable(); \
} while (0)
#define spin_unlock_bh(lock) \
do { \
rt_spin_unlock(lock); \
migrate_enable(); \
local_bh_enable(); \
} while (0)
#define spin_unlock_irq(lock) spin_unlock(lock)
#define spin_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
(void) flags; \
spin_unlock(lock); \
} while (0)
#define spin_trylock_bh(lock) __cond_lock(lock, rt_spin_trylock_bh(lock))
#define spin_trylock_irq(lock) spin_trylock(lock)
#define spin_trylock_irqsave(lock, flags) \
rt_spin_trylock_irqsave(lock, &(flags))
#define spin_unlock_wait(lock) rt_spin_unlock_wait(lock)
#ifdef CONFIG_GENERIC_LOCKBREAK
# define spin_is_contended(lock) ((lock)->break_lock)
#else
# define spin_is_contended(lock) (((void)(lock), 0))
#endif
static inline int spin_can_lock(spinlock_t *lock)
{
return !rt_mutex_is_locked(&lock->lock);
}
static inline int spin_is_locked(spinlock_t *lock)
{
return rt_mutex_is_locked(&lock->lock);
}
static inline void assert_spin_locked(spinlock_t *lock)
{
BUG_ON(!spin_is_locked(lock));
}
#define atomic_dec_and_lock(atomic, lock) \
atomic_dec_and_spin_lock(atomic, lock)
#endif
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