linux-kernel - Re: [PATCH 2/3] erofs: remove obsoluted comments

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Message-ID: <20220507134041.000060da.zbestahu@gmail.com>
Date:   Sat, 7 May 2022 13:40:41 +0800
From:   Yue Hu <zbestahu@...il.com>
To:     Gao Xiang <hsiangkao@...ux.alibaba.com>
Cc:     linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, zhangwen@...lpad.com
Subject: Re: [PATCH 2/3] erofs: remove obsoluted comments

On Sat,  7 May 2022 03:46:11 +0800
Gao Xiang <hsiangkao@...ux.alibaba.com> wrote:

> Some comments haven't been useful anymore since the code updated.
> Let's drop them instead.
> 
> Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
> ---
>  fs/erofs/inode.c    |  5 -----
>  fs/erofs/internal.h | 25 -------------------------
>  2 files changed, 30 deletions(-)
> 
> diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
> index 8d3f56c6469b..8b18d57ec18f 100644
> --- a/fs/erofs/inode.c
> +++ b/fs/erofs/inode.c
> @@ -8,11 +8,6 @@
>  
>  #include <trace/events/erofs.h>
>  
> -/*
> - * if inode is successfully read, return its inode page (or sometimes
> - * the inode payload page if it's an extended inode) in order to fill
> - * inline data if possible.
> - */
>  static void *erofs_read_inode(struct erofs_buf *buf,
>  			      struct inode *inode, unsigned int *ofs)
>  {
> diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
> index ce2a04836cd2..cfee49d33b95 100644
> --- a/fs/erofs/internal.h
> +++ b/fs/erofs/internal.h
> @@ -397,31 +397,6 @@ extern const struct super_operations erofs_sops;
>  extern const struct address_space_operations erofs_raw_access_aops;
>  extern const struct address_space_operations z_erofs_aops;
>  
> -/*
> - * Logical to physical block mapping
> - *
> - * Different with other file systems, it is used for 2 access modes:
> - *
> - * 1) RAW access mode:
> - *
> - * Users pass a valid (m_lblk, m_lofs -- usually 0) pair,
> - * and get the valid m_pblk, m_pofs and the longest m_len(in bytes).
> - *
> - * Note that m_lblk in the RAW access mode refers to the number of
> - * the compressed ondisk block rather than the uncompressed
> - * in-memory block for the compressed file.
> - *
> - * m_pofs equals to m_lofs except for the inline data page.
> - *
> - * 2) Normal access mode:
> - *
> - * If the inode is not compressed, it has no difference with
> - * the RAW access mode. However, if the inode is compressed,
> - * users should pass a valid (m_lblk, m_lofs) pair, and get
> - * the needed m_pblk, m_pofs, m_len to get the compressed data
> - * and the updated m_lblk, m_lofs which indicates the start
> - * of the corresponding uncompressed data in the file.
> - */
>  enum {
>  	BH_Encoded = BH_PrivateStart,
>  	BH_FullMapped,

Reviewed-by: Yue Hu <huyue2@...lpad.com>