BBT_BLOCK_RESERVED
bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
if ((oldval != BBT_BLOCK_RESERVED) &&
bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
if (oldval != BBT_BLOCK_RESERVED)
return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED;
case BBT_BLOCK_RESERVED:
BBT_BLOCK_RESERVED);