linux-kernel - Re: [PATCH] psci: add CPU

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Date:   Mon, 31 Jul 2017 07:34:43 -0500
From:   Nishanth Menon <nm@...com>
To:     Arnd Bergmann <arnd@...db.de>,
        Kevin Brodsky <kevin.brodsky@....com>
CC:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Olof Johansson <olof@...om.net>, Tero Kristo <t-kristo@...com>,
        Thierry Reding <treding@...dia.com>,
        Carlo Caione <carlo@...lessm.com>,
        Jean Delvare <jdelvare@...e.de>,
        <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] psci: add CPU_IDLE dependency

On 07/31/2017 03:55 AM, Arnd Bergmann wrote:
> I ran into a build error for the psci_checker:
> 
> drivers/firmware/psci_checker.o: In function `psci_checker':
> psci_checker.c:(.init.text+0x528): undefined reference to `cpuidle_devices'
> 
> As far as I can tell, this is simply a very rare combination of options,
> but the problem has existed since the code was initially added.
> Adding a Kconfig dependency makes it build properly.
> 
> Fixes: ea8b1c4a6019 ("drivers: psci: PSCI checker module")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/firmware/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
> index 6e4ed5a9c6fd..1983e6e0106f 100644
> --- a/drivers/firmware/Kconfig
> +++ b/drivers/firmware/Kconfig
> @@ -10,7 +10,7 @@ config ARM_PSCI_FW
>   
>   config ARM_PSCI_CHECKER
>   	bool "ARM PSCI checker"
> -	depends on ARM_PSCI_FW && HOTPLUG_CPU && !TORTURE_TEST
> +	depends on ARM_PSCI_FW && HOTPLUG_CPU && CPU_IDLE && !TORTURE_TEST
>   	help
>   	  Run the PSCI checker during startup. This checks that hotplug and
>   	  suspend operations work correctly when using PSCI.
> 
Ccying linux-arm and linux-pm

Reviewed-by: Nishanth Menon <nm@...com>

-- 
Regards,
Nishanth Menon