+ return addr != end;
+}
+
+static inline int check_pmd_range(struct mm_struct *mm, pud_t *pud,
+ unsigned long addr, unsigned long end, unsigned long *nodes)
+{
+ pmd_t *pmd;
+ unsigned long next;
+
+ pmd = pmd_offset(pud, addr);
+ do {
+ next = pmd_addr_end(addr, end);
+ if (pmd_none_or_clear_bad(pmd))
+ continue;
+ if (check_pte_range(mm, pmd, addr, next, nodes))
+ return -EIO;
+ } while (pmd++, addr = next, addr != end);
+ return 0;
+}
+
+static inline int check_pud_range(struct mm_struct *mm, pgd_t *pgd,
+ unsigned long addr, unsigned long end, unsigned long *nodes)
+{
+ pud_t *pud;
+ unsigned long next;
+
+ pud = pud_offset(pgd, addr);
+ do {
+ next = pud_addr_end(addr, end);
+ if (pud_none_or_clear_bad(pud))
+ continue;
+ if (check_pmd_range(mm, pud, addr, next, nodes))
+ return -EIO;
+ } while (pud++, addr = next, addr != end);
+ return 0;
+}
+
+static inline int check_pgd_range(struct mm_struct *mm,
+ unsigned long addr, unsigned long end, unsigned long *nodes)
+{
+ pgd_t *pgd;
+ unsigned long next;
+
+ pgd = pgd_offset(mm, addr);
+ do {
+ next = pgd_addr_end(addr, end);
+ if (pgd_none_or_clear_bad(pgd))
+ continue;
+ if (check_pud_range(mm, pgd, addr, next, nodes))
+ return -EIO;
+ } while (pgd++, addr = next, addr != end);
+ return 0;