linux-kernel - Re: [PATCH] erofs: fold in z_erofs_reload

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Message-ID: <YzKGpUJsVh/T1nVO@B-P7TQMD6M-0146.local>
Date:   Tue, 27 Sep 2022 13:14:14 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     Yue Hu <zbestahu@...il.com>
Cc:     xiang@...nel.org, chao@...nel.org, linux-erofs@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, zhangwen@...lpad.com,
        Yue Hu <huyue2@...lpad.com>
Subject: Re: [PATCH] erofs: fold in z_erofs_reload_indexes()

On Tue, Sep 27, 2022 at 11:25:18AM +0800, Yue Hu wrote:
> From: Yue Hu <huyue2@...lpad.com>
> 
> The name of this function looks not very accurate compared to it's
> implementation and it's only a wrapper to erofs_read_metabuf(). So,
> let's fold it directly instead.
> 
> Signed-off-by: Yue Hu <huyue2@...lpad.com>

Reviewed-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

Thanks,
Gao Xiang

> ---
>  fs/erofs/zmap.c | 28 ++++++++--------------------
>  1 file changed, 8 insertions(+), 20 deletions(-)
> 
> diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
> index ccdddb755be8..4cecd32b87c6 100644
> --- a/fs/erofs/zmap.c
> +++ b/fs/erofs/zmap.c
> @@ -166,18 +166,6 @@ struct z_erofs_maprecorder {
>  	bool partialref;
>  };
>  
> -static int z_erofs_reload_indexes(struct z_erofs_maprecorder *m,
> -				  erofs_blk_t eblk)
> -{
> -	struct super_block *const sb = m->inode->i_sb;
> -
> -	m->kaddr = erofs_read_metabuf(&m->map->buf, sb, eblk,
> -				      EROFS_KMAP_ATOMIC);
> -	if (IS_ERR(m->kaddr))
> -		return PTR_ERR(m->kaddr);
> -	return 0;
> -}
> -
>  static int legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
>  					 unsigned long lcn)
>  {
> @@ -190,11 +178,11 @@ static int legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
>  		lcn * sizeof(struct z_erofs_vle_decompressed_index);
>  	struct z_erofs_vle_decompressed_index *di;
>  	unsigned int advise, type;
> -	int err;
>  
> -	err = z_erofs_reload_indexes(m, erofs_blknr(pos));
> -	if (err)
> -		return err;
> +	m->kaddr = erofs_read_metabuf(&m->map->buf, inode->i_sb,
> +				      erofs_blknr(pos), EROFS_KMAP_ATOMIC);
> +	if (IS_ERR(m->kaddr))
> +		return PTR_ERR(m->kaddr);
>  
>  	m->nextpackoff = pos + sizeof(struct z_erofs_vle_decompressed_index);
>  	m->lcn = lcn;
> @@ -393,7 +381,6 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
>  	unsigned int compacted_4b_initial, compacted_2b;
>  	unsigned int amortizedshift;
>  	erofs_off_t pos;
> -	int err;
>  
>  	if (lclusterbits != 12)
>  		return -EOPNOTSUPP;
> @@ -430,9 +417,10 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
>  	amortizedshift = 2;
>  out:
>  	pos += lcn * (1 << amortizedshift);
> -	err = z_erofs_reload_indexes(m, erofs_blknr(pos));
> -	if (err)
> -		return err;
> +	m->kaddr = erofs_read_metabuf(&m->map->buf, inode->i_sb,
> +				      erofs_blknr(pos), EROFS_KMAP_ATOMIC);
> +	if (IS_ERR(m->kaddr))
> +		return PTR_ERR(m->kaddr);
>  	return unpack_compacted_index(m, amortizedshift, pos, lookahead);
>  }
>  
> -- 
> 2.17.1