linux-kernel - Re: [PATCHv2 3/3] simple_open: Automatically convert to simple

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Message-ID: <20120313102358.GB1516@elte.hu>
Date:	Tue, 13 Mar 2012 11:23:58 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Julia Lawall <Julia.Lawall@...6.fr>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCHv2 3/3] simple_open: Automatically convert to simple_open()


* Stephen Boyd <sboyd@...eaurora.org> wrote:

> Many users of debugfs copy the implementation of default_open()
> when they want to support a custom read/write function op. This
> leads to a proliferation of the default_open() implementation
> across the entire tree. Now that the common implementation has
> been consolidated into libfs we can replace all the users of this
> function with simple_open().
> 
> This replacement was done with the following semantic patch:
> 
> <smpl>
> @ open @
> identifier open_f != simple_open;
> identifier i, f;
> @@
> -int open_f(struct inode *i, struct file *f)
> -{
> (
> -if (i->i_private)
> -f->private_data = i->i_private;
> |
> -f->private_data = i->i_private;
> )
> -return 0;
> -}
> 
> @ has_open depends on open @
> identifier fops;
> identifier open.open_f;
> @@
> struct file_operations fops = {
> ...
> -.open = open_f,
> +.open = simple_open,
> ...
> };
> </smpl>
> 
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Julia Lawall <Julia.Lawall@...6.fr>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> ---
>  arch/arm/mach-msm/smd_debug.c                   |    8 +----
>  arch/arm/plat-mxc/audmux-v2.c                   |    8 +----
>  arch/x86/kernel/kdebugfs.c                      |    9 +----

Acked-by: Ingo Molnar <mingo@...e.hu>

Thanks,

	Ingo
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