linux-kernel - Re: [PATCH] arm: choose debug/uncompress.h include when uncompress debug is disabled

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Message-ID: <alpine.DEB.2.02.1307171420350.8258@kaball.uk.xensource.com>
Date:	Wed, 17 Jul 2013 14:25:38 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Julien Grall <julien.grall@...aro.org>
CC:	<linux@....linux.org.uk>, <stefano.stabellini@...citrix.com>,
	Ian Campbell <Ian.Campbell@...rix.com>, <patches@...aro.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH] arm: choose debug/uncompress.h include when uncompress
 debug is disabled

On Mon, 15 Jul 2013, Julien Grall wrote:
> Even if uncompress debug is disabled, some board will continue to print
> information during uncompress step.

Are you talking about DEBUG_UNCOMPRESS?
Should I read the sentence as "even if DEBUG_UNCOMPRESS is not selected,
some board will continue to print information during the uncompress step"?

Isn't this a bug in the platform specific code that should be fixed anyway?


> By using debug/uncompress.h include, all debug output will be disabled.

I am not sure if this is the right solution to the problem.
I think it might be better to add the appropriate ifdefs into the
platform specific code.

Arnd, what do you think?


> This is usefull in Xen environment for DOM0 because the UART is stolen by
> Xen.
> 
> Signed-off-by: Julien Grall <julien.grall@...aro.org>
>
>  arch/arm/Kconfig.debug |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 21cc8a7..86c023d 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -679,7 +679,7 @@ config DEBUG_UNCOMPRESS
>  
>  config UNCOMPRESS_INCLUDE
>  	string
> -	default "debug/uncompress.h" if ARCH_MULTIPLATFORM
> +	default "debug/uncompress.h" if ARCH_MULTIPLATFORM || !DEBUG_UNCOMPRESS
>  	default "mach/uncompress.h"
>  
>  config EARLY_PRINTK
> -- 
> 1.7.10.4
> 
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