tree 6c20e098a3be7aad77419dc273bfd670dc470f3a
parent 1bf85046e493c88be1c1bad9084428373089f618
author WuBo <wu.bo@cn.fujitsu.com> 1311651011 +0000
committer Chris Mason <chris.mason@oracle.com> 1312223443 -0400

Btrfs: Protect the readonly flag of block group

The access for ro in btrfs_block_group_cache should be protected
because of the racy lock in relocation.

Signed-off-by: Wu Bo <wu.bo@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>