diff options
Diffstat (limited to 'mm/mremap.c')
| -rw-r--r-- | mm/mremap.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index 0843feb66f3d..05f1180e9f21 100644 --- a/mm/mremap.c +++ b/mm/mremap.c | |||
| @@ -194,10 +194,17 @@ unsigned long move_page_tables(struct vm_area_struct *vma, | |||
| 194 | break; | 194 | break; |
| 195 | if (pmd_trans_huge(*old_pmd)) { | 195 | if (pmd_trans_huge(*old_pmd)) { |
| 196 | int err = 0; | 196 | int err = 0; |
| 197 | if (extent == HPAGE_PMD_SIZE) | 197 | if (extent == HPAGE_PMD_SIZE) { |
| 198 | VM_BUG_ON(vma->vm_file || !vma->anon_vma); | ||
| 199 | /* See comment in move_ptes() */ | ||
| 200 | if (need_rmap_locks) | ||
| 201 | anon_vma_lock_write(vma->anon_vma); | ||
| 198 | err = move_huge_pmd(vma, new_vma, old_addr, | 202 | err = move_huge_pmd(vma, new_vma, old_addr, |
| 199 | new_addr, old_end, | 203 | new_addr, old_end, |
| 200 | old_pmd, new_pmd); | 204 | old_pmd, new_pmd); |
| 205 | if (need_rmap_locks) | ||
| 206 | anon_vma_unlock_write(vma->anon_vma); | ||
| 207 | } | ||
| 201 | if (err > 0) { | 208 | if (err > 0) { |
| 202 | need_flush = true; | 209 | need_flush = true; |
| 203 | continue; | 210 | continue; |