106 		pgd_t *pgd = pgd_page + pgd_index(addr) + off;  in kernel_ident_mapping_init()  local
113 		if (pgd_present(*pgd)) {  in kernel_ident_mapping_init()
114 			pud = pud_offset(pgd, 0);  in kernel_ident_mapping_init()
127 		set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));  in kernel_ident_mapping_init()
184 			pgd_t *pgd;  in sync_global_pgds()  local
187 			pgd = (pgd_t *)page_address(page) + pgd_index(address);  in sync_global_pgds()
192 			if (!pgd_none(*pgd_ref) && !pgd_none(*pgd))  in sync_global_pgds()
193 				BUG_ON(pgd_page_vaddr(*pgd)  in sync_global_pgds()
197 				if (pgd_none(*pgd_ref) && !pgd_none(*pgd))  in sync_global_pgds()
198 					pgd_clear(pgd);  in sync_global_pgds()
200 				if (pgd_none(*pgd))  in sync_global_pgds()
201 					set_pgd(pgd, *pgd_ref);  in sync_global_pgds()
233 static pud_t *fill_pud(pgd_t *pgd, unsigned long vaddr)  in fill_pud()  argument
235 	if (pgd_none(*pgd)) {  in fill_pud()
237 		pgd_populate(&init_mm, pgd, pud);  in fill_pud()
238 		if (pud != pud_offset(pgd, 0))  in fill_pud()
240 			       pud, pud_offset(pgd, 0));  in fill_pud()
242 	return pud_offset(pgd, vaddr);  in fill_pud()
289 	pgd_t *pgd;  in set_pte_vaddr()  local
294 	pgd = pgd_offset_k(vaddr);  in set_pte_vaddr()
295 	if (pgd_none(*pgd)) {  in set_pte_vaddr()
300 	pud_page = (pud_t*)pgd_page_vaddr(*pgd);  in set_pte_vaddr()
306 	pgd_t *pgd;  in populate_extra_pmd()  local
309 	pgd = pgd_offset_k(vaddr);  in populate_extra_pmd()
310 	pud = fill_pud(pgd, vaddr);  in populate_extra_pmd()
328 	pgd_t *pgd;  in __init_extra_mapping()  local
337 		pgd = pgd_offset_k((unsigned long)__va(phys));  in __init_extra_mapping()
338 		if (pgd_none(*pgd)) {  in __init_extra_mapping()
340 			set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE |  in __init_extra_mapping()
343 		pud = pud_offset(pgd, (unsigned long)__va(phys));  in __init_extra_mapping()
612 		pgd_t *pgd = pgd_offset_k(start);  in kernel_physical_mapping_init()  local
617 		if (pgd_val(*pgd)) {  in kernel_physical_mapping_init()
618 			pud = (pud_t *)pgd_page_vaddr(*pgd);  in kernel_physical_mapping_init()
629 		pgd_populate(&init_mm, pgd, pud);  in kernel_physical_mapping_init()
770 static bool __meminit free_pud_table(pud_t *pud_start, pgd_t *pgd)  in free_pud_table()  argument
782 	free_pagetable(pgd_page(*pgd), 0);  in free_pud_table()
784 	pgd_clear(pgd);  in free_pud_table()
979 	pgd_t *pgd;  in remove_pagetable()  local
986 		pgd = pgd_offset_k(addr);  in remove_pagetable()
987 		if (!pgd_present(*pgd))  in remove_pagetable()
990 		pud = (pud_t *)pgd_page_vaddr(*pgd);  in remove_pagetable()
992 		if (free_pud_table(pud, pgd))  in remove_pagetable()
1162 	pgd_t *pgd;  in kern_addr_valid()  local
1170 	pgd = pgd_offset_k(addr);  in kern_addr_valid()
1171 	if (pgd_none(*pgd))  in kern_addr_valid()
1174 	pud = pud_offset(pgd, addr);  in kern_addr_valid()
1243 	pgd_t *pgd;  in vmemmap_populate_hugepages()  local
1250 		pgd = vmemmap_pgd_populate(addr, node);  in vmemmap_populate_hugepages()
1251 		if (!pgd)  in vmemmap_populate_hugepages()
1254 		pud = vmemmap_pud_populate(pgd, addr, node);  in vmemmap_populate_hugepages()
1315 	pgd_t *pgd;  in register_page_bootmem_memmap()  local
1324 		pgd = pgd_offset_k(addr);  in register_page_bootmem_memmap()
1325 		if (pgd_none(*pgd)) {  in register_page_bootmem_memmap()
1329 		get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO);  in register_page_bootmem_memmap()
1331 		pud = pud_offset(pgd, addr);  in register_page_bootmem_memmap()