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     * attempts to create an illegal address alias.
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     * attempts to create an illegal address alias.
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     */
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     */
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    spinlock_lock(&parea_lock);
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    spinlock_lock(&parea_lock);
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    parea_t *parea;
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    parea_t *parea;
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    btree_node_t *nodep;
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    btree_node_t *nodep;
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    parea = btree_search(&parea_btree, (btree_key_t) pf, &nodep);
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    parea = (parea_t *) btree_search(&parea_btree, (btree_key_t) pf, &nodep);
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    if (!parea || parea->frames < pages || ((flags & AS_AREA_CACHEABLE) &&
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    if (!parea || parea->frames < pages || ((flags & AS_AREA_CACHEABLE) &&
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        !parea->cacheable) || (!(flags & AS_AREA_CACHEABLE) &&
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        !parea->cacheable) || (!(flags & AS_AREA_CACHEABLE) &&
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        parea->cacheable)) {
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        parea->cacheable)) {
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        /*
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        /*
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         * This physical memory area cannot be mapped.
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         * This physical memory area cannot be mapped.