CHROMIUM: verity: remove dead code in dm_bht_verify_path

drivers/md/dm-bht.c

  /*
  * Copyright (C) 2010 The Chromium OS Authors <chromium-os-dev@chromium.org>
  *
  * Device-Mapper block hash tree interface.
  * See Documentation/device-mapper/dm-bht.txt for details.
  *
  * This file is released under the GPL.
  */
 
 #include <asm/atomic.h>
@@ skipping 719 matching lines @@
                         DMCRIT("entry(d=%u,b=%u) is in an error state: %d",
                                depth, block_index, state);
                         DMCRIT("verification is not possible");
                         goto mismatch;
                 } else if (state <= DM_BHT_ENTRY_PENDING) {
                         DMERR("entry not ready for verify: d=%u,b=%u",
                               depth, block_index);
                         goto mismatch;
                 }
 
-                /* At depth 0, we're at the page underneath the root node and
-                 * leave its validation to a separate path.
-                 */
-                if (depth == 0)
-                        break;
-
                 /* We need to check that this entry matches the expected
                  * hash in the parent->nodes.
                  */
                 parent = dm_bht_get_entry(bht, depth - 1, block_index);
                 /* This call is only safe if all nodes along the path
                  * are already populated (i.e. READY) via dm_bht_populate.
                  */
                 BUG_ON(atomic_read(&parent->state) < DM_BHT_ENTRY_READY);
                 node = dm_bht_get_node(bht, parent, depth, block_index);
                 page = virt_to_page(entry->nodes);
@@ skipping 538 matching lines @@
                 DMERR("no root digest exists to export");
                 if (available > 0)
                         *hexdigest = 0;
                 return -1;
         }
         dm_bht_bin_to_hex(bht->root_digest, hexdigest, bht->digest_size);
         return 0;
 }
 EXPORT_SYMBOL(dm_bht_root_hexdigest);