linux-kernel - Re: [PATCH 3/4] minixfs: Use dir_put_page() in minix_unlink() and minix

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Date:   Thu, 14 Dec 2023 13:02:54 +0100
From:   "Fabio M. De Francesco" <fabio.maria.de.francesco@...ux.intel.com>
To:     linux-fsdevel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] minixfs: Use dir_put_page() in minix_unlink() and
 minix_rename()

On Wednesday, 13 December 2023 01:08:48 CET Al Viro wrote:
> ... rather than open-coding it there.  Counterpart of the
> corresponding fs/sysv commit from Fabio's series...

Yes, I can still remember this code ;)

> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
>  fs/minix/dir.c   |  6 ------
>  fs/minix/minix.h |  5 +++++
>  fs/minix/namei.c | 12 ++++--------
>  3 files changed, 9 insertions(+), 14 deletions(-)

Reviewed-by: Fabio M. De Francesco <fabio.maria.de.francesco@...ux.intel.com>

> diff --git a/fs/minix/dir.c b/fs/minix/dir.c
> index 4e5483adea40..ccb6c47fd7fe 100644
> --- a/fs/minix/dir.c
> +++ b/fs/minix/dir.c
> @@ -26,12 +26,6 @@ const struct file_operations minix_dir_operations = {
>  	.fsync		= generic_file_fsync,
>  };
> 
> -static inline void dir_put_page(struct page *page)
> -{
> -	kunmap(page);
> -	put_page(page);
> -}
> -
>  /*
>   * Return the offset into page `page_nr' of the last valid
>   * byte in that page, plus one.
> diff --git a/fs/minix/minix.h b/fs/minix/minix.h
> index d493507c064f..cb42b6cf7909 100644
> --- a/fs/minix/minix.h
> +++ b/fs/minix/minix.h
> @@ -64,6 +64,11 @@ extern int V2_minix_get_block(struct inode *, long,
> struct buffer_head *, int); extern unsigned V1_minix_blocks(loff_t, struct
> super_block *);
>  extern unsigned V2_minix_blocks(loff_t, struct super_block *);
> 
> +static inline void dir_put_page(struct page *page)
> +{
> +	kunmap(page);
> +	put_page(page);
> +}
>  extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct
> page**); extern int minix_add_link(struct dentry*, struct inode*);
>  extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
> diff --git a/fs/minix/namei.c b/fs/minix/namei.c
> index 114084d5636a..20923a15e30a 100644
> --- a/fs/minix/namei.c
> +++ b/fs/minix/namei.c
> @@ -149,8 +149,7 @@ static int minix_unlink(struct inode * dir, struct
> dentry *dentry) if (!de)
>  		return -ENOENT;
>  	err = minix_delete_entry(de, page);
> -	kunmap(page);
> -	put_page(page);
> +	dir_put_page(page);
> 
>  	if (err)
>  		return err;
> @@ -242,13 +241,10 @@ static int minix_rename(struct mnt_idmap *idmap,
>  			inode_dec_link_count(old_dir);
>  	}
>  out_dir:
> -	if (dir_de) {
> -		kunmap(dir_page);
> -		put_page(dir_page);
> -	}
> +	if (dir_de)
> +		dir_put_page(dir_page);
>  out_old:
> -	kunmap(old_page);
> -	put_page(old_page);
> +	dir_put_page(old_page);
>  out:
>  	return err;
>  }