hugetlb_add_hstate
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(CONT_PMD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(CONT_PTE_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(shift - PAGE_SHIFT);
hugetlb_add_hstate(order);
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(HPAGE_64K_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(HPAGE_256MB_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(HPAGE_2GB_SHIFT - PAGE_SHIFT);
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
void __init hugetlb_add_hstate(unsigned order);
hugetlb_add_hstate(HUGETLB_PAGE_ORDER);
hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);
hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);