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| author | Ingo Molnar <mingo@elte.hu> | 2010-10-20 04:38:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-20 04:38:59 +0200 |
| commit | 14d4962dc863ab42e898d66d4837aa6c3afedc3b (patch) | |
| tree | 780cb53645b781dfd33b6d0ad21e0596f2ad1a1a /mm/rmap.c | |
| parent | 9717967c4b704ce344c954afb5bb160aa9c01c34 (diff) | |
| parent | 2b666ca4a68cbc22483b0f2e1ba3c0e59b01ae9e (diff) | |
Merge branch 'linus' into irq/core
Merge reason: update to almost-final-.36
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 || |