linux-kernel - Re: [JANITOR PROPOSAL] Switch ioctl functions to ->unlocked

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Date:	Wed, 09 Jan 2008 02:00:21 -0800
From:	Junio C Hamano <junio@...ox.com>
To:	Andi Kleen <andi@...stfloor.org>
cc:	Arnd Bergmann <arnd@...db.de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	linux-kernel@...r.kernel.org, apw@...dowen.org
Subject: Re: [JANITOR PROPOSAL] Switch ioctl functions to ->unlocked_ioctl

Andi Kleen <andi@...stfloor.org> writes:

> I imagined it would check for 
>
> +struct file_operations ... = { 
> +      ...
> +	.ioctl = ...
>
> That wouldn't catch the case of someone adding only .ioctl to an 
> already existing file_operations which is not visible in the patch context, 
> but that should be hopefully rare. The more common case is adding
> completely new operations.

Because "diff -p" format used by the kernel mailing list takes
the most recent line that begins with an identifier letter and
put that on the hunk header line, even in such a case, you will
see:

	@@ -l,k +m,n @@ struct file_operations ... = {
		...
		...
	+	...
	+	.ioctl = ...
	+	...
		...

which would be a good enough cue that the new .ioctl member is
added to file_operations.
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