linux-kernel - Re: [PATCH] [v2] cpuidle: add ARCH_SUSPEND

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Date:   Tue, 7 Feb 2023 11:14:38 +0100
From:   Thierry Reding <treding@...dia.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Dmitry Osipenko <digetx@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Randy Dunlap <rdunlap@...radead.org>, stable@...r.kernel.org,
        Anup Patel <anup@...infault.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Michael Walle <michael@...le.cc>,
        Bjorn Andersson <andersson@...nel.org>,
        Lina Iyer <ilina@...eaurora.org>,
        Stephan Gerhold <stephan@...hold.net>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] cpuidle: add ARCH_SUSPEND_POSSIBLE dependencies

On Mon, Feb 06, 2023 at 08:33:06PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Some ARMv4 processors don't support suspend, which leads
> to a build failure with the tegra and qualcomm cpuidle driver:
> 
> WARNING: unmet direct dependencies detected for ARM_CPU_SUSPEND
>   Depends on [n]: ARCH_SUSPEND_POSSIBLE [=n]
>   Selected by [y]:
>   - ARM_TEGRA_CPUIDLE [=y] && CPU_IDLE [=y] && (ARM [=y] || ARM64) && (ARCH_TEGRA [=n] || COMPILE_TEST [=y]) && !ARM64 && MMU [=y]
> 
> arch/arm/kernel/sleep.o: in function `__cpu_suspend':
> (.text+0x68): undefined reference to `cpu_sa110_suspend_size'
> (.text+0x68): undefined reference to `cpu_fa526_suspend_size'
> 
> Add an explicit dependency to make randconfig builds avoid
> this combination.
> 
> Fixes: faae6c9f2e68 ("cpuidle: tegra: Enable compile testing")
> Fixes: a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic CPUidle driver")
> Link: https://lore.kernel.org/all/20211013160125.772873-1-arnd@kernel.org/
> Cc: Randy Dunlap <rdunlap@...radead.org>
> Cc: stable@...r.kernel.org
> Reviewed-by: Dmitry Osipenko <digetx@...il.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> I found this in my backlog of patches that never made it upstream,
> testing shows this is still needed. Please apply.
> ---
>  drivers/cpuidle/Kconfig.arm | 2 ++
>  1 file changed, 2 insertions(+)

Acked-by: Thierry Reding <treding@...dia.com>

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