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-rw-r--r--mm/rmap.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 7e975ca24c7..450f5241b5a 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -445,16 +445,12 @@ void page_add_anon_rmap(struct page *page,
if (atomic_inc_and_test(&page->_mapcount)) {
struct anon_vma *anon_vma = vma->anon_vma;
- pgoff_t index;
BUG_ON(!anon_vma);
anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
page->mapping = (struct address_space *) anon_vma;
- index = (address - vma->vm_start) >> PAGE_SHIFT;
- index += vma->vm_pgoff;
- index >>= PAGE_CACHE_SHIFT - PAGE_SHIFT;
- page->index = index;
+ page->index = linear_page_index(vma, address);
inc_page_state(nr_mapped);
}