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| author | Olof Johansson <olof@lixom.net> | 2014-05-29 22:39:43 +0200 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2014-05-29 22:39:43 +0200 |
| commit | 8320857b1d168fd17d7cee48bbfd04aaf6797be8 (patch) | |
| tree | 58b31d3d9514df93974216f190824d73f9816d9f /mm/mremap.c | |
| parent | ARM: multi_v7_defconfig: Enable Zynq peripheral drivers (diff) | |
| parent | Linux 3.15-rc6 (diff) | |
| download | linux-8320857b1d168fd17d7cee48bbfd04aaf6797be8.tar.xz linux-8320857b1d168fd17d7cee48bbfd04aaf6797be8.zip | |
Merge tag 'v3.15-rc6' into next/defconfig
Linux 3.15-rc6
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, break; if (pmd_trans_huge(*old_pmd)) { int err = 0; - if (extent == HPAGE_PMD_SIZE) + if (extent == HPAGE_PMD_SIZE) { + VM_BUG_ON(vma->vm_file || !vma->anon_vma); + /* See comment in move_ptes() */ + if (need_rmap_locks) + anon_vma_lock_write(vma->anon_vma); err = move_huge_pmd(vma, new_vma, old_addr, new_addr, old_end, old_pmd, new_pmd); + if (need_rmap_locks) + anon_vma_unlock_write(vma->anon_vma); + } if (err > 0) { need_flush = true; continue; |