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    /*
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    /*
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     * Do CPU usage accounting and find out whether to preempt THREAD.
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     * Do CPU usage accounting and find out whether to preempt THREAD.
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     */
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     */
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    if (THREAD) {
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    if (THREAD) {
- 
 
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        __u64 ticks;
- 
 
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        spinlock_lock(&CPU->lock);
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        spinlock_lock(&CPU->lock);
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        CPU->needs_relink++;
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        CPU->needs_relink++;
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        spinlock_unlock(&CPU->lock);   
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        spinlock_unlock(&CPU->lock);   
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        spinlock_lock(&THREAD->lock);
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        spinlock_lock(&THREAD->lock);
- 
 
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        if (ticks = THREAD->ticks)
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        if (!THREAD->ticks--) {
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            THREAD->ticks--;
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            spinlock_unlock(&THREAD->lock);
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        spinlock_unlock(&THREAD->lock);
- 
 
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- 
 
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        if (!ticks && !PREEMPTION_DISABLED) {
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            scheduler();
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            scheduler();
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        }
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        }
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        else {
 - 
 
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            spinlock_unlock(&THREAD->lock);
 - 
 
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        }
 - 
 
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    }
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    }
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}
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}