Merge branch 'akpm'(patches from Andrew)

[karo-tx-linux.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 8eb7bb40dc40b6e8e89d05fbb7e05f8c836e05da..f7cb3d4d9c2eb55d74738e374faa3bfa37251686 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -160,9 +160,11 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma,
                }
 
                if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) {
-                       if (next - addr != HPAGE_PMD_SIZE)
+                       if (next - addr != HPAGE_PMD_SIZE) {
                                split_huge_pmd(vma, pmd, addr);
-                       else {
+                               if (pmd_none(*pmd))
+                                       continue;
+                       } else {
                                int nr_ptes = change_huge_pmd(vma, pmd, addr,
                                                newprot, prot_numa);