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Rev 3150 Rev 3153
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    t = (thread_t *) slab_alloc(thread_slab, 0);
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    t = (thread_t *) slab_alloc(thread_slab, 0);
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    if (!t)
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    if (!t)
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        return NULL;
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        return NULL;
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    /* Not needed, but good for debugging */
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    /* Not needed, but good for debugging */
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    memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES,
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    memsetb(t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, 0);
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        0);
 - 
 
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    ipl = interrupts_disable();
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    ipl = interrupts_disable();
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    spinlock_lock(&tidlock);
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    spinlock_lock(&tidlock);
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    t->tid = ++last_tid;
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    t->tid = ++last_tid;
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    spinlock_unlock(&tidlock);
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    spinlock_unlock(&tidlock);