linux-kernel - Re: [PATCH v5 3/4] fs/ufs: Use ufs_put_page() in ufs

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Date:   Thu, 29 Dec 2022 16:50:07 -0800
From:   Ira Weiny <ira.weiny@...el.com>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>
CC:     Evgeniy Dushistov <dushistov@...l.ru>,
        Al Viro <viro@...iv.linux.org.uk>,
        <linux-kernel@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v5 3/4] fs/ufs: Use ufs_put_page() in ufs_rename()

On Thu, Dec 29, 2022 at 11:50:59PM +0100, Fabio M. De Francesco wrote:
> Use the ufs_put_page() helper in ufs_rename() instead of open-coding three
> kunmap() + put_page().
> 
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Suggested-by: Ira Weiny <ira.weiny@...el.com>

Reviewed-by: Ira Weiny <ira.weiny@...el.com>

> Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>
> ---
>  fs/ufs/dir.c   | 2 +-
>  fs/ufs/namei.c | 9 +++------
>  fs/ufs/ufs.h   | 1 +
>  3 files changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
> index ae3b20354a28..0bfd563ab0c2 100644
> --- a/fs/ufs/dir.c
> +++ b/fs/ufs/dir.c
> @@ -61,7 +61,7 @@ static int ufs_commit_chunk(struct page *page, loff_t pos, unsigned len)
>  	return err;
>  }
>  
> -static inline void ufs_put_page(struct page *page)
> +inline void ufs_put_page(struct page *page)
>  {
>  	kunmap(page);
>  	put_page(page);
> diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
> index 29d5a0e0c8f0..486b0f2e8b7a 100644
> --- a/fs/ufs/namei.c
> +++ b/fs/ufs/namei.c
> @@ -307,8 +307,7 @@ static int ufs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
>  		if (old_dir != new_dir)
>  			ufs_set_link(old_inode, dir_de, dir_page, new_dir, 0);
>  		else {
> -			kunmap(dir_page);
> -			put_page(dir_page);
> +			ufs_put_page(dir_page);
>  		}
>  		inode_dec_link_count(old_dir);
>  	}
> @@ -317,12 +316,10 @@ static int ufs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
>  
>  out_dir:
>  	if (dir_de) {
> -		kunmap(dir_page);
> -		put_page(dir_page);
> +		ufs_put_page(dir_page);
>  	}
>  out_old:
> -	kunmap(old_page);
> -	put_page(old_page);
> +	ufs_put_page(old_page);
>  out:
>  	return err;
>  }
> diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
> index 550f7c5a3636..f7ba8df25d03 100644
> --- a/fs/ufs/ufs.h
> +++ b/fs/ufs/ufs.h
> @@ -98,6 +98,7 @@ extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, uns
>  extern void ufs_put_cylinder (struct super_block *, unsigned);
>  
>  /* dir.c */
> +extern void ufs_put_page(struct page *page);
>  extern const struct inode_operations ufs_dir_inode_operations;
>  extern int ufs_add_link (struct dentry *, struct inode *);
>  extern ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
> -- 
> 2.39.0
>