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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-19 22:06:36 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-19 22:06:36 +0100 |
| commit | 809b4e00baf006a990a73329ba381d536c6fa277 (patch) | |
| tree | e949e0efd019d6f932537aba762792b07a84351c /mm/rmap.c | |
| parent | a0a55682b83fd5f012afadcf415b030d7424ae68 (diff) | |
| parent | 79a94c3538bda6869d7bb150b5e02dd3a72314dd (diff) | |
Merge branch 'devel-stable' into devel
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 9d2ba01bd4f9..92e6757f196e 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -381,7 +381,13 @@ vma_address(struct page *page, struct vm_area_struct *vma) unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma) { if (PageAnon(page)) { - if (vma->anon_vma->root != page_anon_vma(page)->root) + struct anon_vma *page__anon_vma = page_anon_vma(page); + /* + * Note: swapoff's unuse_vma() is more efficient with this + * check, and needs it to match anon_vma when KSM is active. + */ + if (!vma->anon_vma || !page__anon_vma || + vma->anon_vma->root != page__anon_vma->root) return -EFAULT; } else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) { if (!vma->vm_file || |