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#ifndef KERN_SPINLOCK_H_
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#ifndef KERN_SPINLOCK_H_
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#define KERN_SPINLOCK_H_
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#define KERN_SPINLOCK_H_
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#include <arch/types.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <preemption.h>
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#include <preemption.h>
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#include <atomic.h>
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#include <atomic.h>
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#include <debug.h>
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#include <debug.h>
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#ifdef CONFIG_SMP
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#ifdef CONFIG_SMP
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    /*
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    /*
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     * Prevent critical section code from bleeding out this way down.
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     * Prevent critical section code from bleeding out this way down.
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     */
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     */
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    CS_LEAVE_BARRIER();
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    CS_LEAVE_BARRIER();
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    atomic_set(&sl->val,0);
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    atomic_set(&sl->val, 0);
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    preemption_enable();
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    preemption_enable();
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}
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}
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#else
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#else
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/* On UP systems, spinlocks are effectively left out. */
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/* On UP systems, spinlocks are effectively left out. */
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#define SPINLOCK_DECLARE(name)
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#define SPINLOCK_DECLARE(name)
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#define SPINLOCK_INITIALIZE(name)
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#define SPINLOCK_INITIALIZE(name)
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#define spinlock_initialize(x,name)
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#define spinlock_initialize(x, name)
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#define spinlock_lock(x)        preemption_disable()
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#define spinlock_lock(x)        preemption_disable()
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#define spinlock_trylock(x)         (preemption_disable(), 1)
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#define spinlock_trylock(x)         (preemption_disable(), 1)
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#define spinlock_unlock(x)      preemption_enable()
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#define spinlock_unlock(x)      preemption_enable()
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#endif
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#endif