btrfs: get fs_info from trans in btrfs_run_dev_replace

We can read fs_info from the transaction and can drop it from the
parameters.
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/dev-replace.c

@@ -273,9 +273,9 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
  * called from commit_transaction. Writes changed device replace state to
  * disk.
  */
-int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info)
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int ret;
 	struct btrfs_root *dev_root = fs_info->dev_root;
 	struct btrfs_path *path;

fs/btrfs/dev-replace.h

@@ -9,8 +9,7 @@
 struct btrfs_ioctl_dev_replace_args;
 
 int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
-int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info);
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans);
 int btrfs_dev_replace_by_ioctl(struct btrfs_fs_info *fs_info,
 			    struct btrfs_ioctl_dev_replace_args *args);
 void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,

fs/btrfs/transaction.c

@@ -1097,7 +1097,7 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans)
 	ret = btrfs_run_dev_stats(trans);
 	if (ret)
 		return ret;
-	ret = btrfs_run_dev_replace(trans, fs_info);
+	ret = btrfs_run_dev_replace(trans);
 	if (ret)
 		return ret;
 	ret = btrfs_run_qgroups(trans);