Btrfs: get forced transaction commits via workqueue

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 74e6aad..e93ba1a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -283,6 +283,7 @@
 struct crypto_hash;
 
 struct btrfs_fs_info {
+	spinlock_t hash_lock;
 	struct btrfs_root *extent_root;
 	struct btrfs_root *tree_root;
 	struct btrfs_root *dev_root;
@@ -308,10 +309,11 @@
 	struct mutex trans_mutex;
 	struct mutex fs_mutex;
 	struct list_head trans_list;
+	struct list_head dead_roots;
 	struct crypto_hash *hash_tfm;
 	struct delayed_work trans_work;
-	spinlock_t hash_lock;
 	int do_barriers;
+	int closing;
 };
 
 /*