linux-kernel - Re: [PATCH 01 of 23] VFS: change struct file to use struct path

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Message-Id: <20061021002200.4731cdeb.akpm@osdl.org>
Date:	Sat, 21 Oct 2006 00:22:00 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Josef "Jeff" Sipek <jsipek@...sunysb.edu>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	torvalds@...l.org, viro@....linux.org.uk, hch@...radead.org,
	jack@...e.cz
Subject: Re: [PATCH 01 of 23] VFS: change struct file to use struct path

On Sat, 21 Oct 2006 02:17:26 -0400
Josef "Jeff" Sipek <jsipek@...sunysb.edu> wrote:

> From: Josef "Jeff" Sipek <jsipek@...sunysb.edu>
> 
> This patch changes struct file to use struct path instead of having
> independent pointers to struct dentry and struct vfsmount, and converts all
> users of f_{dentry,vfsmnt} in fs/ to use f_path.{dentry,mnt}.
> 

why?

> @@ -723,8 +724,9 @@ struct file {
>  		struct list_head	fu_list;
>  		struct rcu_head 	fu_rcuhead;
>  	} f_u;
> -	struct dentry		*f_dentry;
> -	struct vfsmount         *f_vfsmnt;
> +	struct path		f_path;
> +#define f_dentry	f_path.dentry
> +#define f_vfsmnt	f_path.mnt
>  	const struct file_operations	*f_op;
>  	atomic_t		f_count;
>  	unsigned int 		f_flags;
-
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