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

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Message-ID: <20061218102653.GA23947@flint.arm.linux.org.uk>
Date:	Mon, 18 Dec 2006 10:26:53 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
Cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Remove logically superfluous comparisons from Kconfig files.

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

Also, you create some constructs such as:

        depends on && PCI

which is obviously wrong.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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