linux-kernel - Re: [PATCH 4/4] mqueue namespace: adapt sysctl

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Message-Id: <20090224144800.4c7e3fcb.akpm@linux-foundation.org>
Date:	Tue, 24 Feb 2009 14:48:00 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	serue@...ibm.com, clg@...ibm.com, linux-kernel@...r.kernel.org,
	containers@...ts.osdl.org
Subject: Re: [PATCH 4/4] mqueue namespace: adapt sysctl

On Wed, 25 Feb 2009 01:32:45 +0300
Alexey Dobriyan <adobriyan@...il.com> wrote:

> > > +proc_handler *proc_mq_dointvec = NULL;
> > > +proc_handler *proc_mq_dointvec_minmax = NULL;
> > > +#endif
> > 
> > looks odd.  Was this
> > 
> > --- a/ipc/mq_sysctl.c~mqueue-namespace-adapt-sysctl-update-fix
> > +++ a/ipc/mq_sysctl.c
> > @@ -52,8 +52,8 @@ static int proc_mq_dointvec_minmax(ctl_t
> >  					lenp, ppos);
> >  }
> >  #else
> > -proc_handler *proc_mq_dointvec = NULL;
> > -proc_handler *proc_mq_dointvec_minmax = NULL;
> > +#define proc_mq_dointvec NULL
> > +#define proc_mq_dointvec_minmax NULL
> >  #endif
> 
> I hope, not.
> 
> "#define foo NULL" is the least intrusive thing.

well the original code would have spat a warning at compile time
then tried to execute code from BSS at runtime, methinks.

But I can't be assed working out how to disable CONFIG_SYSCTL to
test that.  Gawd I hate `select'.
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