linux-kernel - Re: [PATCH] ARM: b.L: fix unmet dependency for CPU

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Message-ID: <alpine.LFD.2.11.1411131231060.11690@knanqh.ubzr>
Date:	Thu, 13 Nov 2014 12:44:22 -0500 (EST)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Pankaj Dubey <pankaj.dubey@...sung.com>
cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: Re: [PATCH] ARM: b.L: fix unmet dependency for CPU_PM

On Thu, 13 Nov 2014, Pankaj Dubey wrote:

> If BL_SWITCHER is enabled but SUSPEND and CPU_IDLE is not enabled
> we are getting following config warning.
> 
> warning: (BL_SWITCHER) selects CPU_PM which has unmet direct
> dependencies (SUSPEND || CPU_IDLE)
> 
> So BL_SWITCHER should enable CPU_PM only if either of SUSPEND or
> CPU_IDLE is selected.
> 
> Signed-off-by: Pankaj Dubey <pankaj.dubey@...sung.com>
> ---
>  arch/arm/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 9d580d0..fe3d969 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1417,7 +1417,7 @@ config BL_SWITCHER
>  	bool "big.LITTLE switcher support"
>  	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
>  	select ARM_CPU_SUSPEND
> -	select CPU_PM
> +	select CPU_PM if (SUSPEND || CPU_IDLE)

NAK.  You just broke the code by doing this. CPU_PM is a requirement 
here.  The dependencies for CPU_PM is lacking.


Nicolas
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