early_alloc_pgtable
void __init *early_alloc_pgtable(unsigned long size);
pud = early_alloc_pgtable(PAGE_SIZE, node, 0, 0);
ptep = early_alloc_pgtable(PAGE_SIZE, nid,
pmd = early_alloc_pgtable(PAGE_SIZE, node, 0, 0);
pte = early_alloc_pgtable(PAGE_SIZE, node, 0, 0);
process_tb = early_alloc_pgtable(1UL << PRTB_SIZE_SHIFT, -1, 0, 0);
pudp = early_alloc_pgtable(PAGE_SIZE, nid,
pmdp = early_alloc_pgtable(PAGE_SIZE, nid, region_start,
ptep = early_alloc_pgtable(PTE_FRAG_SIZE);
ptep = early_alloc_pgtable(PTE_FRAG_SIZE);
pmdp = early_alloc_pgtable(PMD_TABLE_SIZE);
ptep = early_alloc_pgtable(PTE_TABLE_SIZE);
pudp = early_alloc_pgtable(PUD_TABLE_SIZE);
pte_t *ptep = early_alloc_pgtable(PTE_FRAG_SIZE);