pud = pud_offset(pgd, addr);
do {
+ again:
next = pud_addr_end(addr, end);
- if (pud_none_or_clear_bad(pud)) {
+ if (pud_none(*pud) || !walk->vma) {
if (walk->pte_hole)
err = walk->pte_hole(addr, next, walk);
if (err)
break;
continue;
}
+
+ if (walk->pud_entry) {
+ spinlock_t *ptl = pud_trans_huge_lock(pud, walk->vma);
+
+ if (ptl) {
+ err = walk->pud_entry(pud, addr, next, walk);
+ spin_unlock(ptl);
+ if (err)
+ break;
+ continue;
+ }
+ }
+
+ split_huge_pud(walk->vma, pud, addr);
+ if (pud_none(*pud))
+ goto again;
+
if (walk->pmd_entry || walk->pte_entry)
err = walk_pmd_range(pud, addr, next, walk);
if (err)