linux-kernel - Re: [PATCH] Fix corruption of CONFIG_X86

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Date:	Mon, 30 May 2011 23:04:46 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Arnaud Lacombe <lacombar@...il.com>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	David Woodhouse <dwmw2@...radead.org>,
	John Stultz <john.stultz@...aro.org>,
	Ingo Molnar <mingo@...e.hu>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix corruption of CONFIG_X86_32 in 'make oldconfig'

On Monday 30 May 2011 22:30:14 Arnaud Lacombe wrote:
> % KCONFIG_ALLCONFIG=arch/arm/configs/omap2plus_defconfig make ARCH=arm
> allnoconfig
> scripts/kconfig/conf --allnoconfig Kconfig
> arch/arm/configs/omap2plus_defconfig:92:warning: symbol value 'm'
> invalid for BT_L2CAP
> arch/arm/configs/omap2plus_defconfig:93:warning: symbol value 'm'
> invalid for BT_SCO
> warning: (ARCH_STMP3XXX && ARCH_OMAP3 && ARCH_OMAP4) selects
> USB_ARCH_HAS_EHCI which has unmet direct dependencies (USB_SUPPORT)
> warning: (ARCH_OMAP4) selects PL310_ERRATA_588369 which has unmet
> direct dependencies (CACHE_L2X0)
> warning: (ARCH_OMAP4) selects PL310_ERRATA_727915 which has unmet
> direct dependencies (CACHE_L2X0)
> #
> # configuration written to .config
> #
> 
> % grep CONFIG_ARCH_OMAP .config
> CONFIG_ARCH_OMAP=y
> # CONFIG_ARCH_OMAP1 is not set
> CONFIG_ARCH_OMAP2PLUS=y
> # CONFIG_ARCH_OMAP2PLUS_TYPICAL is not set
> CONFIG_ARCH_OMAP2=y
> CONFIG_ARCH_OMAP3=y
> CONFIG_ARCH_OMAP4=y
> 
> did I missed something ?

I figured it out now. I was using a separate object directory, which
caused the relative file name arch/arm/configs/omap2plus_defconfig
not to be found and the KCONFIG_ALLCONFIG option to be silently
dropped. I misinterpreted the resulting .config file as one that only
got the choice statements wrong, when in fact it had not taken any
default values that I passed.

In short, everything's fine except for a missing warning message
when the allconfig snippet is not found, and me making a fool of
myself.

It did solve one of my problems in the end, so I'm happy.

	Arnd
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