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#else
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#else
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struct spinlock {
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struct spinlock {
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};
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};
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#define spinlock_initialize(x)
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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