linux-kernel - Re: [PATCH] ARM: mutually exclude ZBOOT_ROM and AUTO

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Date:	Fri, 14 Oct 2011 18:29:48 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Olof Johansson <olof@...om.net>
Cc:	"Russell King - ARM Linux" <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, ccross@...roid.com,
	swarren@...dia.com, pdeschrijver@...dia.com
Subject: Re: [PATCH] ARM: mutually exclude ZBOOT_ROM and AUTO_ZRELADDR

On Friday 14 October 2011, Olof Johansson wrote:
> This way platforms that want it can select AUTO_ZRELADDR without issues caused by
> someone manually also enabling ZBOOT_ROM.
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 82973b2..2ad58e8 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1814,6 +1814,7 @@ config ZBOOT_ROM_BSS
>  config ZBOOT_ROM
>  	bool "Compressed boot loader in ROM/flash"
>  	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
> +	depends on !AUTO_ZRELADDR
>  	help
>  	  Say Y here if you intend to execute your compressed kernel image
>  	  (zImage) directly from ROM or flash.  If unsure, say N.

Unfortunately, you cannot have it both ways:

arnd@...c-kvm:~/linux-arm$ make O=obj-tmp CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm  -sj20  menuconfig
arch/arm/Kconfig:1761:error: recursive dependency detected!
arch/arm/Kconfig:1761:  symbol ZBOOT_ROM depends on AUTO_ZRELADDR
arch/arm/Kconfig:1899:  symbol AUTO_ZRELADDR depends on ZBOOT_ROM

	Arnd
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