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    return !sum;
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    return !sum;
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}
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}
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void map_sdt(struct acpi_sdt_header *sdt)
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void map_sdt(struct acpi_sdt_header *sdt)
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{
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{
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    int i, cnt, length;
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    map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
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    map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
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    length = sdt->length + ((__address) sdt) - ((__address) sdt)&0xfffff000;
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    map_structure((__address) sdt, sdt->length);
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    cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0);
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    for (i = 1; i < cnt; i++)
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        map_page_to_frame(((__address) sdt) + i*PAGE_SIZE, ((__address) sdt) + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0);
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}
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}
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void acpi_init(void)
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void acpi_init(void)
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{
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{
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        __u8 *addr[2] = { NULL, (__u8 *) 0xe0000 };
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        __u8 *addr[2] = { NULL, (__u8 *) 0xe0000 };