diff options
| -rw-r--r-- | mm/rmap.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index f6f0d2dda2ea..2854857fd63b 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1564,13 +1564,14 @@ static void __hugepage_set_anon_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address, int exclusive) { struct anon_vma *anon_vma = vma->anon_vma; + BUG_ON(!anon_vma); - if (!exclusive) { - struct anon_vma_chain *avc; - avc = list_entry(vma->anon_vma_chain.prev, - struct anon_vma_chain, same_vma); - anon_vma = avc->anon_vma; - } + + if (PageAnon(page)) + return; + if (!exclusive) + anon_vma = anon_vma->root; + anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON; page->mapping = (struct address_space *) anon_vma; page->index = linear_page_index(vma, address); |