linux-kernel - CTL_UNNUMBERED (Re: [PATCH] 9p: Don't use binary sysctl numbers.)

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Date:	Sun, 22 Jul 2007 00:57:09 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Eric Van Hensbergen <ericvh@...il.com>,
	Latchesar Ionkov <lucho@...kov.net>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: CTL_UNNUMBERED (Re: [PATCH] 9p: Don't use binary sysctl numbers.)

On Sat, Jul 21, 2007 at 12:53:19PM -0600, Eric W. Biederman wrote:
> The recent 9p commit: bd238fb431f31989898423c8b6496bc8c4204a86
> that supposedly only moved files also introduced a new 9p sysctl
> interface that did not properly register it's sysctl binary numbers,
> and since it was only for debugging clearly did not need a binary fast
> path in any case.  So this patch just remove the binary numbers.
>
> See Documentation/sysctl/ctl_unnumbered.txt for more details.
>
> While I was at it I cleaned up the sysctl initializers a little as
> well so there is less to read.

> --- a/net/9p/sysctl.c
> +++ b/net/9p/sysctl.c
> @@ -28,15 +28,10 @@

> -enum {
> -	P9_SYSCTL_NET = 487,
> -	P9_SYSCTL_DEBUG = 1,
> -};
> -
> -static ctl_table p9_table[] = {
> +static struct ctl_table p9_table[] = {
>  #ifdef CONFIG_NET_9P_DEBUG
>  	{
> -		.ctl_name       = P9_SYSCTL_DEBUG,
> +		.ctl_name       = CTL_UNNUMBERED,

That's separate patch but CTL_UNNUMBERED must die, because it's totally
unneeded. If you don't want sysctl(2) interface just SKIP ->ctl_name
initialization and save one line for something useful.

	{
		.procname       = "prove_locking",
		.data		= &prove_locking,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},

Or too late for -rc1?

-
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