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     * Note that TLB shootdown is not attempted as only new information is
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     * Note that TLB shootdown is not attempted as only new information is
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     * being inserted into page tables.
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     * being inserted into page tables.
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     */
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     */
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    page_mapping_insert(AS, addr, frame, as_area_get_flags(area));
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    page_mapping_insert(AS, addr, frame, as_area_get_flags(area));
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    if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
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    if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
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        panic("Could not insert used space.\n");
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        panic("Cannot insert used space.");
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    return AS_PF_OK;
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    return AS_PF_OK;
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}
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}
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/** Free a frame that is backed by the anonymous memory backend.
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/** Free a frame that is backed by the anonymous memory backend.