linux-kernel - Re: [PATCH] cpuidle: ARM_QCOM_SPM_CPUIDLE should depend on HAVE_ARM

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Date:   Mon, 7 Jun 2021 13:53:23 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, He Ying <heying24@...wei.com>,
        Arnd Bergmann <arnd@...nel.org>
Subject: Re: [PATCH] cpuidle: ARM_QCOM_SPM_CPUIDLE should depend on
 HAVE_ARM_SMCCC

Hi!

On Sun, Jun 06, 2021 at 12:00:48PM -0700, Randy Dunlap wrote:
> QCOM_SCM depends on HAVE_ARM_SMCCC, so ARM_QCOM_SPM_CPUIDLE should
> also depend on HAVE_ARM_SMCCC since 'select' does not follow any
> dependency chains.
> 
> This fixes a kconfig warning and subsequent build errors:
> 
> WARNING: unmet direct dependencies detected for QCOM_SCM
>   Depends on [n]: (ARM [=y] || ARM64) && HAVE_ARM_SMCCC [=n]
>   Selected by [y]:
>   - ARM_QCOM_SPM_CPUIDLE [=y] && CPU_IDLE [=y] && (ARM [=y] || ARM64) && (ARCH_QCOM [=n] || COMPILE_TEST [=y]) && !ARM64 && MMU [=y]
> 
> arm-linux-gnueabi-ld: drivers/firmware/qcom_scm-smc.o: in function `__scm_smc_do_quirk':
> qcom_scm-smc.c:(.text+0x5c): undefined reference to `__arm_smccc_smc'
> arm-linux-gnueabi-ld: drivers/firmware/qcom_scm-legacy.o: in function `scm_legacy_call':
> qcom_scm-legacy.c:(.text+0x140): undefined reference to `__arm_smccc_smc'
> arm-linux-gnueabi-ld: drivers/firmware/qcom_scm-legacy.o: in function `scm_legacy_call_atomic':
> qcom_scm-legacy.c:(.text+0x364): undefined reference to `__arm_smccc_smc'
> 
> Fixes: a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic CPUidle driver")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Stephan Gerhold <stephan@...hold.net>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Cc: Andy Gross <agross@...nel.org>
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: linux-arm-msm@...r.kernel.org
> Cc: He Ying <heying24@...wei.com>

There was a similar patch from Arnd a while ago (which fixes another
warning for ARM_CPU_SUSPEND?):

https://lore.kernel.org/linux-pm/20210421135723.3601743-1-arnd@kernel.org/

I'm not sure who is supposed to pick it up. :)

Thanks!
Stephan

> ---
>  drivers/cpuidle/Kconfig.arm |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- linux-next-20210604.orig/drivers/cpuidle/Kconfig.arm
> +++ linux-next-20210604/drivers/cpuidle/Kconfig.arm
> @@ -108,6 +108,7 @@ config ARM_TEGRA_CPUIDLE
>  config ARM_QCOM_SPM_CPUIDLE
>  	bool "CPU Idle Driver for Qualcomm Subsystem Power Manager (SPM)"
>  	depends on (ARCH_QCOM || COMPILE_TEST) && !ARM64 && MMU
> +	depends on HAVE_ARM_SMCCC
>  	select ARM_CPU_SUSPEND
>  	select CPU_IDLE_MULTIPLE_DRIVERS
>  	select DT_IDLE_STATES