fix some conversion overflows

[mirror_ubuntu-artful-kernel.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index 02ebb1f1d3b0e2fa70298d21dbb1b88d4471a65d..0e5ec371ce727e8fcccd79d33108b9aca1f051ca 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2221,7 +2221,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct page *page,
        lock_page(page);
        size = i_size_read(inode);
        if ((page->mapping != inode->i_mapping) ||
-           ((page->index << PAGE_CACHE_SHIFT) > size)) {
+           (page_offset(page) > size)) {
                /* page got truncated out from underneath us */
                goto out_unlock;
        }