btrfs: Don't pass fs_info arg to btrfs_start_dirty_block_groups

It can be referenced from the passed transaction so no point in passing
it as a function argument. No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -2675,8 +2675,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
 			 u64 bytenr, u64 num_bytes, u64 parent,
 			 u64 root_objectid, u64 owner, u64 offset);
 
-int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
-				   struct btrfs_fs_info *fs_info);
+int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
 				   struct btrfs_fs_info *fs_info);
 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,

fs/btrfs/extent-tree.c

@@ -3660,9 +3660,9 @@ int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
  * the commit latency by getting rid of the easy block groups while
  * we're still allowing others to join the commit.
  */
-int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
-				   struct btrfs_fs_info *fs_info)
+int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_block_group_cache *cache;
 	struct btrfs_transaction *cur_trans = trans->transaction;
 	int ret = 0;

fs/btrfs/transaction.c

@@ -2015,7 +2015,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 		mutex_unlock(&fs_info->ro_block_group_mutex);
 
 		if (run_it)
-			ret = btrfs_start_dirty_block_groups(trans, fs_info);
+			ret = btrfs_start_dirty_block_groups(trans);
 	}
 	if (ret) {
 		btrfs_end_transaction(trans);