linux-kernel - Re: [PATCH 1/3] fs/btrfs/disk-io: Remove unneeded variable "err"

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Message-ID: <5B67B5B0.7040006@huawei.com>
Date:   Mon, 6 Aug 2018 10:42:56 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Nikolay Borisov <nborisov@...e.com>
CC:     <clm@...com>, <jbacik@...com>, <dsterba@...e.com>,
        <linux-btrfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] fs/btrfs/disk-io: Remove unneeded variable "err"

On 2018/8/6 3:13, Nikolay Borisov wrote:
>
> On  5.08.2018 18:02, zhong jiang wrote:
>> The err is not used after initalization, So remove it and make
>> the function to be void function.
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> The ret value of this function is not checked by the sole caller
> (btrfs_cleanup_one_transaction), however, this does not give you the
> right to use a bulk commit message. If you want your future
> contributions to be taken seriously please put actual effort in properly
> describing your changes.
 I am sorry for that. I will merge the series into a patch. I will repost.

 Thanks,
 zhong jiang
>
>> ---
>>  fs/btrfs/disk-io.c | 12 ++++--------
>>  1 file changed, 4 insertions(+), 8 deletions(-)
>>
>> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
>> index 468365d..34e4926 100644
>> --- a/fs/btrfs/disk-io.c
>> +++ b/fs/btrfs/disk-io.c
>> @@ -53,8 +53,8 @@
>>  static const struct extent_io_ops btree_extent_io_ops;
>>  static void end_workqueue_fn(struct btrfs_work *work);
>>  static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
>> -static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>> -				      struct btrfs_fs_info *fs_info);
>> +static void btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>> +				       struct btrfs_fs_info *fs_info);
>>  static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
>>  static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
>>  					struct extent_io_tree *dirty_pages,
>> @@ -4179,13 +4179,12 @@ static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info)
>>  	spin_unlock(&fs_info->ordered_root_lock);
>>  }
>>  
>> -static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>> -				      struct btrfs_fs_info *fs_info)
>> +static void btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>> +				       struct btrfs_fs_info *fs_info)
>>  {
>>  	struct rb_node *node;
>>  	struct btrfs_delayed_ref_root *delayed_refs;
>>  	struct btrfs_delayed_ref_node *ref;
>> -	int ret = 0;
>>  
>>  	delayed_refs = &trans->delayed_refs;
>>  
>> @@ -4193,7 +4192,6 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>>  	if (atomic_read(&delayed_refs->num_entries) == 0) {
>>  		spin_unlock(&delayed_refs->lock);
>>  		btrfs_info(fs_info, "delayed_refs has NO entry");
>> -		return ret;
>>  	}
>>  
>>  	while ((node = rb_first(&delayed_refs->href_root)) != NULL) {
>> @@ -4247,8 +4245,6 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
>>  	}
>>  
>>  	spin_unlock(&delayed_refs->lock);
>> -
>> -	return ret;
>>  }
>>  
>>  static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
>>
>