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#ifndef __LINUX_SPINLOCK_UP_H

#define __LINUX_SPINLOCK_UP_H

#ifndef __LINUX_SPINLOCK_H

# error "please don't include this file directly"

#endif

/*

 * include/linux/spinlock_up.h - UP-debug version of spinlocks.

 *

 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar

 * Released under the General Public License (GPL).

 *

 * In the debug case, 1 means unlocked, 0 means locked. (the values

 * are inverted, to catch initialization bugs)

 *

 * No atomicity anywhere, we are on UP.

 */

#ifdef CONFIG_DEBUG_SPINLOCK

#define __raw_spin_is_locked(x)         ((x)->slock == 0)

static inline void __raw_spin_lock(raw_spinlock_t *lock)

{

        lock->slock = 0;

}

static inline void

__raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)

{

        local_irq_save(flags);

        lock->slock = 0;

}

static inline int __raw_spin_trylock(raw_spinlock_t *lock)

{

        char oldval = lock->slock;

        lock->slock = 0;

        return oldval > 0;

}

static inline void __raw_spin_unlock(raw_spinlock_t *lock)

{

        lock->slock = 1;

}

/*

 * Read-write spinlocks. No debug version.

 */

#define __raw_read_lock(lock)           do { (void)(lock); } while (0)

#define __raw_write_lock(lock)          do { (void)(lock); } while (0)

#define __raw_read_trylock(lock)        ({ (void)(lock); 1; })

#define __raw_write_trylock(lock)       ({ (void)(lock); 1; })

#define __raw_read_unlock(lock)         do { (void)(lock); } while (0)

#define __raw_write_unlock(lock)        do { (void)(lock); } while (0)

#else /* DEBUG_SPINLOCK */

#define __raw_spin_is_locked(lock)      ((void)(lock), 0)

/* for sched.c and kernel_lock.c: */

# define __raw_spin_lock(lock)          do { (void)(lock); } while (0)

# define __raw_spin_unlock(lock)        do { (void)(lock); } while (0)

# define __raw_spin_trylock(lock)       ({ (void)(lock); 1; })

#endif /* DEBUG_SPINLOCK */

#define __raw_read_can_lock(lock)       (((void)(lock), 1))

#define __raw_write_can_lock(lock)      (((void)(lock), 1))

#define __raw_spin_unlock_wait(lock) \

                do { cpu_relax(); } while (__raw_spin_is_locked(lock))

#endif /* __LINUX_SPINLOCK_UP_H */