kernel-fxtec-pro1x/arch/blackfin/include/asm/spinlock.h
Mike Frysinger 3d15063093 Blackfin: convert locking primitives to asm-generic
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-18 21:41:22 -04:00

95 lines
2.3 KiB
C

#ifndef __BFIN_SPINLOCK_H
#define __BFIN_SPINLOCK_H
#ifndef CONFIG_SMP
# include <asm-generic/spinlock.h>
#else
#include <asm/atomic.h>
asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr);
asmlinkage void __raw_spin_lock_asm(volatile int *ptr);
asmlinkage int __raw_spin_trylock_asm(volatile int *ptr);
asmlinkage void __raw_spin_unlock_asm(volatile int *ptr);
asmlinkage void __raw_read_lock_asm(volatile int *ptr);
asmlinkage int __raw_read_trylock_asm(volatile int *ptr);
asmlinkage void __raw_read_unlock_asm(volatile int *ptr);
asmlinkage void __raw_write_lock_asm(volatile int *ptr);
asmlinkage int __raw_write_trylock_asm(volatile int *ptr);
asmlinkage void __raw_write_unlock_asm(volatile int *ptr);
static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
{
return __raw_spin_is_locked_asm(&lock->lock);
}
static inline void __raw_spin_lock(raw_spinlock_t *lock)
{
__raw_spin_lock_asm(&lock->lock);
}
#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
static inline int __raw_spin_trylock(raw_spinlock_t *lock)
{
return __raw_spin_trylock_asm(&lock->lock);
}
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
__raw_spin_unlock_asm(&lock->lock);
}
static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
{
while (__raw_spin_is_locked(lock))
cpu_relax();
}
static inline int __raw_read_can_lock(raw_rwlock_t *rw)
{
return __raw_uncached_fetch_asm(&rw->lock) > 0;
}
static inline int __raw_write_can_lock(raw_rwlock_t *rw)
{
return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS;
}
static inline void __raw_read_lock(raw_rwlock_t *rw)
{
__raw_read_lock_asm(&rw->lock);
}
static inline int __raw_read_trylock(raw_rwlock_t *rw)
{
return __raw_read_trylock_asm(&rw->lock);
}
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
__raw_read_unlock_asm(&rw->lock);
}
static inline void __raw_write_lock(raw_rwlock_t *rw)
{
__raw_write_lock_asm(&rw->lock);
}
static inline int __raw_write_trylock(raw_rwlock_t *rw)
{
return __raw_write_trylock_asm(&rw->lock);
}
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
__raw_write_unlock_asm(&rw->lock);
}
#define _raw_spin_relax(lock) cpu_relax()
#define _raw_read_relax(lock) cpu_relax()
#define _raw_write_relax(lock) cpu_relax()
#endif
#endif /* !__BFIN_SPINLOCK_H */