Re: [PATCH 1/2] btrfs: Factor out read portion of btrfs_get_blocks_direct

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On Wed, Apr 11, 2018 at 10:22:58AM +0300, Nikolay Borisov wrote:
> >> +			free_extent_map(em);
> >> +			goto unlock_err;
> >> +		}
> >> +		/*
> >> +		 * We need to unlock only the end area that we aren't using
> >> +		 * if there is any leftover space
> >> +		 */
> >> +		free_extent_state(cached_state);
> >>  		free_extent_map(em);
> >> -		goto unlock_err;
> >> +		return 0;
> > 
> > Please add a separate label for that, the funcion uses the single exit
> > block style (labels and one-or-two returns).
> 
> So I think this is unnecessary because in 2/2 I factor out common code
> i.e. the free_extent_map(em); return 0; outside of the 'if' branch and
> so this return disappears. The 3rd hunk in 2/2 begins with:
> 
> @@ -7780,106 +7882,8 @@ static int btrfs_get_blocks_direct(struct inode
> *inode, sector_t iblock,
>  		 * if there is any leftover space
>  		 */
>  		free_extent_state(cached_state);
> -		free_extent_map(em);
> -		return 0;
> -	}

Ok.
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