linux-ext4 - Re: [PATCH] ext4: remove useless ext4_pin

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Date:   Mon, 4 Mar 2019 17:41:22 -0700
From:   Andreas Dilger <adilger@...ger.ca>
To:     Jason Yan <yanaijie@...wei.com>
Cc:     tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: remove useless ext4_pin_inode()

This was originally added during early ext4 development to pin open directories, but it was never really used. I don't mind to remove it. 

Cheers, Andreas

> On Mar 3, 2019, at 18:31, Jason Yan <yanaijie@...wei.com> wrote:
> 
> Friendly ping...
> 
> Anyone can help to review this patch?
> 
>> On 2019/2/27 10:20, Jason Yan wrote:
>> This function is never used from the beginning. Let's remove it.
>> Signed-off-by: Jason Yan <yanaijie@...wei.com>
>> ---
>>  fs/ext4/inode.c | 30 ------------------------------
>>  1 file changed, 30 deletions(-)
>> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
>> index 34d7e0703cc6..0060d08edd92 100644
>> --- a/fs/ext4/inode.c
>> +++ b/fs/ext4/inode.c
>> @@ -6089,36 +6089,6 @@ void ext4_dirty_inode(struct inode *inode, int flags)
>>      return;
>>  }
>>  -#if 0
>> -/*
>> - * Bind an inode's backing buffer_head into this transaction, to prevent
>> - * it from being flushed to disk early.  Unlike
>> - * ext4_reserve_inode_write, this leaves behind no bh reference and
>> - * returns no iloc structure, so the caller needs to repeat the iloc
>> - * lookup to mark the inode dirty later.
>> - */
>> -static int ext4_pin_inode(handle_t *handle, struct inode *inode)
>> -{
>> -    struct ext4_iloc iloc;
>> -
>> -    int err = 0;
>> -    if (handle) {
>> -        err = ext4_get_inode_loc(inode, &iloc);
>> -        if (!err) {
>> -            BUFFER_TRACE(iloc.bh, "get_write_access");
>> -            err = jbd2_journal_get_write_access(handle, iloc.bh);
>> -            if (!err)
>> -                err = ext4_handle_dirty_metadata(handle,
>> -                                 NULL,
>> -                                 iloc.bh);
>> -            brelse(iloc.bh);
>> -        }
>> -    }
>> -    ext4_std_error(inode->i_sb, err);
>> -    return err;
>> -}
>> -#endif
>> -
>>  int ext4_change_inode_journal_flag(struct inode *inode, int val)
>>  {
>>      journal_t *journal;
>