133 	 * consecutive sections. Remember for the last added PMD the last  in vmemmap_use_new_sub_pmd()
134 	 * unused range in the populated PMD.  in vmemmap_use_new_sub_pmd()
140 /* Returns true if the PMD is completely unused and can be freed. */
151 static int __ref modify_pte_table(pmd_t *pmd, unsigned long addr,  in modify_pte_table()  argument
162 	pte = pte_offset_kernel(pmd, addr);  in modify_pte_table()
192 static void try_free_pte_table(pmd_t *pmd, unsigned long start)  in try_free_pte_table()  argument
198 	pte = pte_offset_kernel(pmd, start);  in try_free_pte_table()
203 	vmem_pte_free(__va(pmd_deref(*pmd)));  in try_free_pte_table()
204 	pmd_clear(pmd);  in try_free_pte_table()
213 	pmd_t *pmd;  in modify_pmd_table()  local
220 	pmd = pmd_offset(pud, addr);  in modify_pmd_table()
221 	for (; addr < end; addr = next, pmd++) {  in modify_pmd_table()
224 			if (pmd_none(*pmd))  in modify_pmd_table()
226 			if (pmd_large(*pmd) && !add) {  in modify_pmd_table()
230 						vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE));  in modify_pmd_table()
231 					pmd_clear(pmd);  in modify_pmd_table()
234 					vmem_free_pages(pmd_deref(*pmd), get_order(PMD_SIZE));  in modify_pmd_table()
235 					pmd_clear(pmd);  in modify_pmd_table()
239 		} else if (pmd_none(*pmd)) {  in modify_pmd_table()
244 				pmd_val(*pmd) = addr | prot;  in modify_pmd_table()
259 					pmd_val(*pmd) = __pa(new_page) | prot;  in modify_pmd_table()
270 			pmd_populate(&init_mm, pmd, pte);  in modify_pmd_table()
271 		} else if (pmd_large(*pmd)) {  in modify_pmd_table()
276 		ret = modify_pte_table(pmd, addr, next, add, direct);  in modify_pmd_table()
280 			try_free_pte_table(pmd, addr & PMD_MASK);  in modify_pmd_table()
292 	pmd_t *pmd;  in try_free_pmd_table()  local
302 	pmd = pmd_offset(pud, start);  in try_free_pmd_table()
303 	for (i = 0; i < PTRS_PER_PMD; i++, pmd++)  in try_free_pmd_table()
304 		if (!pmd_none(*pmd))  in try_free_pmd_table()
316 	pmd_t *pmd;  in modify_pud_table()  local
344 			pmd = vmem_crst_alloc(_SEGMENT_ENTRY_EMPTY);  in modify_pud_table()
345 			if (!pmd)  in modify_pud_table()
347 			pud_populate(&init_mm, pud, pmd);  in modify_pud_table()