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SubjectRe: CTL_UNNUMBERED (Re: [PATCH] 9p: Don't use binary sysctl numbers.)
On Sun, 22 Jul 2007 00:57:09 +0400 Alexey Dobriyan <adobriyan@gmail.com> wrote:

> 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?

It might be too late for -rc1 but it isn't too late for 2.6.23.

This affects a userspace interface. Let's get it right please,
no rush.
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