linux-kernel - Re: [PATCH v1 1/5] fs/buffer: clean up block_commit

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Date:   Mon, 19 Jun 2023 11:52:30 +0200
From:   Jan Kara <jack@...e.cz>
To:     Bean Huo <beanhuo@...pp.de>
Cc:     viro@...iv.linux.org.uk, brauner@...nel.org,
        akpm@...ux-foundation.org, jack@...e.cz, jack@...e.com,
        tytso@....edu, adilger.kernel@...ger.ca, mark@...heh.com,
        jlbec@...lplan.org, joseph.qi@...ux.alibaba.com,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, ocfs2-devel@....oracle.com,
        beanhuo@...ron.com
Subject: Re: [PATCH v1 1/5] fs/buffer: clean up block_commit_write

On Sun 18-06-23 23:32:46, Bean Huo wrote:
> From: Bean Huo <beanhuo@...ron.com>
> 
> Originally inode is used to get blksize, after commit 45bce8f3e343
> ("fs/buffer.c: make block-size be per-page and protected by the page lock"),
> __block_commit_write no longer uses this parameter inode, this patch is to
> remove inode and clean up block_commit_write.
> 
> Signed-off-by: Bean Huo <beanhuo@...ron.com>

Nice! Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/buffer.c | 15 +++------------
>  1 file changed, 3 insertions(+), 12 deletions(-)
> 
> diff --git a/fs/buffer.c b/fs/buffer.c
> index a7fc561758b1..b88bb7ec38be 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -2116,8 +2116,7 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
>  }
>  EXPORT_SYMBOL(__block_write_begin);
>  
> -static int __block_commit_write(struct inode *inode, struct page *page,
> -		unsigned from, unsigned to)
> +int block_commit_write(struct page *page, unsigned int from, unsigned int to)
>  {
>  	unsigned block_start, block_end;
>  	int partial = 0;
> @@ -2154,6 +2153,7 @@ static int __block_commit_write(struct inode *inode, struct page *page,
>  		SetPageUptodate(page);
>  	return 0;
>  }
> +EXPORT_SYMBOL(block_commit_write);
>  
>  /*
>   * block_write_begin takes care of the basic task of block allocation and
> @@ -2188,7 +2188,6 @@ int block_write_end(struct file *file, struct address_space *mapping,
>  			loff_t pos, unsigned len, unsigned copied,
>  			struct page *page, void *fsdata)
>  {
> -	struct inode *inode = mapping->host;
>  	unsigned start;
>  
>  	start = pos & (PAGE_SIZE - 1);
> @@ -2214,7 +2213,7 @@ int block_write_end(struct file *file, struct address_space *mapping,
>  	flush_dcache_page(page);
>  
>  	/* This could be a short (even 0-length) commit */
> -	__block_commit_write(inode, page, start, start+copied);
> +	block_commit_write(page, start, start+copied);
>  
>  	return copied;
>  }
> @@ -2535,14 +2534,6 @@ int cont_write_begin(struct file *file, struct address_space *mapping,
>  }
>  EXPORT_SYMBOL(cont_write_begin);
>  
> -int block_commit_write(struct page *page, unsigned from, unsigned to)
> -{
> -	struct inode *inode = page->mapping->host;
> -	__block_commit_write(inode,page,from,to);
> -	return 0;
> -}
> -EXPORT_SYMBOL(block_commit_write);
> -
>  /*
>   * block_page_mkwrite() is not allowed to change the file size as it gets
>   * called from a page fault handler when a page is first dirtied. Hence we must
> -- 
> 2.34.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR