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Date:   Tue, 14 Feb 2023 01:17:18 +0530
From:   Ojaswin Mujoo <ojaswin@...ux.ibm.com>
To:     Kemeng Shi <shikemeng@...weicloud.com>
Cc:     tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/21] ext4: remove unused return value of
 ext4_mb_try_best_found and ext4_mb_free_metadata

On Fri, Feb 10, 2023 at 03:48:13AM +0800, Kemeng Shi wrote:
> Return value static function ext4_mb_try_best_found and
> ext4_mb_free_metadata is not used. Just remove unused return value.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
> ---
>  fs/ext4/mballoc.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 17ac98c501ed..ad9e3b7d3198 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2124,7 +2124,7 @@ static void ext4_mb_measure_extent(struct ext4_allocation_context *ac,
>  }
>  
>  static noinline_for_stack
> -int ext4_mb_try_best_found(struct ext4_allocation_context *ac,
> +void ext4_mb_try_best_found(struct ext4_allocation_context *ac,
>  					struct ext4_buddy *e4b)
>  {
>  	struct ext4_free_extent ex = ac->ac_b_ex;
> @@ -2135,7 +2135,7 @@ int ext4_mb_try_best_found(struct ext4_allocation_context *ac,
>  	BUG_ON(ex.fe_len <= 0);
>  	err = ext4_mb_load_buddy(ac->ac_sb, group, e4b);
>  	if (err)
> -		return err;
> +		return;
>  
>  	ext4_lock_group(ac->ac_sb, group);
>  	max = mb_find_extent(e4b, ex.fe_start, ex.fe_len, &ex);
> @@ -2147,8 +2147,6 @@ int ext4_mb_try_best_found(struct ext4_allocation_context *ac,
>  
>  	ext4_unlock_group(ac->ac_sb, group);
>  	ext4_mb_unload_buddy(e4b);
> -
> -	return 0;
>  }
>  
>  static noinline_for_stack
> @@ -5699,7 +5697,7 @@ static void ext4_try_merge_freed_extent(struct ext4_sb_info *sbi,
>  	kmem_cache_free(ext4_free_data_cachep, entry);
>  }
>  
> -static noinline_for_stack int
> +static noinline_for_stack void
>  ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
>  		      struct ext4_free_data *new_entry)
>  {
> @@ -5742,7 +5740,7 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
>  				EXT4_C2B(sbi, cluster),
>  				"Block already on to-be-freed list");
>  			kmem_cache_free(ext4_free_data_cachep, new_entry);
> -			return 0;
> +			return;
>  		}
>  	}
>  
> @@ -5768,7 +5766,6 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
>  	list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list);
>  	sbi->s_mb_free_pending += clusters;
>  	spin_unlock(&sbi->s_md_lock);
> -	return 0;
>  }
>  
>  /*
> -- 
> 2.30.0
> 
Feel free to add:

Reviewed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com> 

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