linux-kernel - Re: How to force Kconfig tristate into range n..m?

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Date:	Tue, 15 May 2007 17:18:32 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-kernel@...r.kernel.org, ak@...e.de
Subject: Re: How to force Kconfig tristate into range n..m?

On Tue, May 15, 2007 at 04:41:30PM -0700, Randy Dunlap wrote:
> On Tue, 15 May 2007 16:30:02 -0700 Paul E. McKenney wrote:
> 
> > Hello!
> > 
> > It would be nice to constrain RCU_TORTURE_TEST to "n" or "m", excluding
> > "y", since "y" gives anti-social results that I have never seen a use
> > for.  So I tried adding a "range n m" to the Kconfig.debug entry for
> > RCU_TORTURE_TEST.  This gives me the following warning at "make xconfig"
> > time:
> > 
> >    lib/Kconfig.debug:386:warning: range is only allowed for int or hex symbols
> > 
> > and xconfig ignores the restriction.
> > 
> > A few clumsy hacks get rid of the error message, but fail to cause
> > xconfig to enforce the limit.
> > 
> > Is there some other way to prohibit modules from being compiled into
> > the main kernel?
> 
> I think that
> 	depends on m
> will do what you want.  That's what some ancient PCMCIA drivers
> do, as well as the crypto test module.

This indeed works!  Thank you!!!

						Thanx, Paul
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