diff options
Diffstat (limited to 'mm/mremap.c')
| -rw-r--r-- | mm/mremap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index fc45dc9a617b..a32fed454bd7 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -141,6 +141,10 @@ move_one_page(struct vm_area_struct *vma, unsigned long old_addr, if (dst) { pte_t pte; pte = ptep_clear_flush(vma, old_addr, src); + /* ZERO_PAGE can be dependant on virtual addr */ + if (pfn_valid(pte_pfn(pte)) && + pte_page(pte) == ZERO_PAGE(old_addr)) + pte = pte_wrprotect(mk_pte(ZERO_PAGE(new_addr), new_vma->vm_page_prot)); set_pte_at(mm, new_addr, dst, pte); } else error = -ENOMEM; |