Btrfs: Take the csum mutex while reading checksums

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 38c75a0256c..0f756e0175c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -382,6 +382,9 @@ static noinline int add_dirty_roots(struct btrfs_trans_handle *trans,
                         memcpy(dirty->root, root, sizeof(*root));
                         dirty->root->node = root->commit_root;
                         dirty->latest_root = root;
+                        spin_lock_init(&dirty->root->node_lock);
+                        mutex_init(&dirty->root->objectid_mutex);
+
                         root->commit_root = NULL;
 
                         root->root_key.offset = root->fs_info->generation;