Use zero_user_page() instead of open-coding it.
Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
         * XXX sys_readahead() seems to get that wrong?
         */
        if (start >= i_size_read(inode)) {
-               char *addr = kmap(page);
-               memset(addr, 0, PAGE_SIZE);
-               flush_dcache_page(page);
-               kunmap(page);
+               zero_user_page(page, 0, PAGE_SIZE, KM_USER0);
                SetPageUptodate(page);
                ret = 0;
                goto out_alloc;