linux-kernel - Re: [PATCH] Remove logically superfluous comparisons from Kconfig files.

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Message-ID: <Pine.LNX.4.64.0612180527440.22930@localhost.localdomain>
Date:	Mon, 18 Dec 2006 05:28:07 -0500 (EST)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Russell King <rmk+lkml@....linux.org.uk>
cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Remove logically superfluous comparisons from Kconfig
 files.

On Mon, 18 Dec 2006, Russell King wrote:

> On Mon, Dec 18, 2006 at 05:14:01AM -0500, Robert P. J. Day wrote:
> >   Remove Kconfig comparisons of the form FUBAR || FUBAR=n, since they
> > appear to be superfluous.
>
> config FOO
> 	tristate 'foo'
> 	depends on BAR || BAR=n
>
> is not superfluous.  The allowed states for FOO with the above construct
> are (assuming modules are enabled):
>
> 	BAR	FOO
> 	Y	Y,M,N
> 	M	M,N
> 	N	Y,M,N

ah, ok, i get it now.

> Also, you create some constructs such as:
>
>         depends on && PCI
>
> which is obviously wrong.

whoops, sorry, i didn't even notice that.

rday
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