CHROMIUM: verity: don't call page_address on unmapped highmem pages

drivers/md/dm-verity.c

 /*
  * Originally based on dm-crypt.c,
  * Copyright (C) 2003 Christophe Saout <christophe@saout.de>
  * Copyright (C) 2004 Clemens Fruhwirth <clemens@endorphin.org>
  * Copyright (C) 2006-2008 Red Hat, Inc. All rights reserved.
  * Copyright (C) 2010 The Chromium OS Authors <chromium-os-dev@chromium.org>
  *                    All Rights Reserved.
  *
  * This file is released under the GPL.
  *
@@ skipping 660 matching lines @@
         for (idx = bio->bi_idx; idx < bio->bi_vcnt; idx++) {
                 struct bio_vec *bv = bio_iovec_idx(bio, idx);
 
                 VERITY_BUG_ON(bv->bv_offset % VERITY_BLOCK_SIZE);
                 VERITY_BUG_ON(bv->bv_len % VERITY_BLOCK_SIZE);
 
                 DMDEBUG("Updating hash for block %u", block);
 
                 /* TODO(msb) handle case where multiple blocks fit in a page */
                 r = dm_bht_verify_block(&vc->bht, block,
-                                        page_address(bv->bv_page));
+                                        bv->bv_page, bv->bv_offset);
                 /* dm_bht functions aren't expected to return errno friendly
                  * values.  They are converted here for uniformity.
                  */
                 if (r > 0) {
                         DMERR("Pending data for block %u seen at verify",
                               block);
                         r = -EBUSY;
                         goto bad_state;
                 }
                 if (r < 0) {
@@ skipping 682 matching lines @@
         dm_unregister_target(&verity_target);
         kmem_cache_destroy(_verity_io_pool);
 }
 
 module_init(dm_verity_init);
 module_exit(dm_verity_exit);
 
 MODULE_AUTHOR("The Chromium OS Authors <chromium-os-dev@chromium.org>");
 MODULE_DESCRIPTION(DM_NAME " target for transparent disk integrity checking");
 MODULE_LICENSE("GPL");