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Subject[PATCH v9 2/6] filemap: update offset check in filemap_fault()
Date
With THP, current check of offset:

VM_BUG_ON_PAGE(page->index != offset, page);

is no longer accurate. Update it to:

VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);

Acked-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
mm/filemap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index f5b79a43946d..5f072a113535 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2522,7 +2522,7 @@ vm_fault_t filemap_fault(struct vm_fault *vmf)
put_page(page);
goto retry_find;
}
- VM_BUG_ON_PAGE(page->index != offset, page);
+ VM_BUG_ON_PAGE(page_to_pgoff(page) != offset, page);

/*
* We have a locked page in the page cache, now we need to check
--
2.17.1
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