linux-kernel - Re: [PATCH v2 2/2] erofs: support reading chunk-based uncompressed files

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Message-ID: <YR4ETD4sPl356Ci9@B-P7TQMD6M-0146.local>
Date:   Thu, 19 Aug 2021 15:12:12 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     Joseph Qi <joseph.qi@...ux.alibaba.com>
Cc:     linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>,
        Liu Bo <bo.liu@...ux.alibaba.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Peng Tao <tao.peng@...ux.alibaba.com>,
        Eryu Guan <eguan@...ux.alibaba.com>,
        Liu Jiang <gerry@...ux.alibaba.com>,
        Tao Ma <boyu.mt@...bao.com>
Subject: Re: [PATCH v2 2/2] erofs: support reading chunk-based uncompressed
 files

Hi Joseph,

On Thu, Aug 19, 2021 at 02:37:50PM +0800, Joseph Qi wrote:
> 
> 
> On 8/19/21 2:33 PM, Gao Xiang wrote:

...

> > diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
> > index d13e0709599c..4408929bd6f5 100644
> > --- a/fs/erofs/inode.c
> > +++ b/fs/erofs/inode.c
> > @@ -2,6 +2,7 @@
> >  /*
> >   * Copyright (C) 2017-2018 HUAWEI, Inc.
> >   *             https://www.huawei.com/
> > + * Copyright (C) 2021, Alibaba Cloud
> >   */
> >  #include "xattr.h"
> >  
> > @@ -122,7 +123,9 @@ static struct page *erofs_read_inode(struct inode *inode,
> >  		/* total blocks for compressed files */
> >  		if (erofs_inode_is_data_compressed(vi->datalayout))
> >  			nblks = le32_to_cpu(die->i_u.compressed_blocks);
> > -
> > +		else if (vi->datalayout == EROFS_INODE_CHUNK_BASED)
> > +			/* fill chunked inode summary info */
> > +			vi->chunkformat = le16_to_cpu(die->i_u.c.format);
> 
> Better to add braces for if/else.

Thanks for the kind suggestion. Here is single statement, I've checked
coding-style in Documentation. It's no necessary to use brace for this.
And checkpatch didn't report anything.

Also, I found some reference at
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/mm/vmscan.c?h=v5.13#n3066

But anyway, I could update it when applying, either looks good to me.

Thanks,
Gao Xiang