linux-kernel - [PATCH] cpuidle: tegra: add ARCH_SUSPEND

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Date:   Wed, 13 Oct 2021 18:01:19 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <treding@...dia.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        He Ying <heying24@...wei.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] cpuidle: tegra: add ARCH_SUSPEND_POSSIBLE dependency

From: Arnd Bergmann <arnd@...db.de>

Some StrongARM processors don't support suspend, which leads
to a build failure with the tegra 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'

Add an explicit dependency to make randconfig builds avoid
this combination.

Fixes: faae6c9f2e68 ("cpuidle: tegra: Enable compile testing")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/cpuidle/Kconfig.arm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm
index 2cc3c208a180..af97992eaa82 100644
--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -100,6 +100,7 @@ config ARM_MVEBU_V7_CPUIDLE
 config ARM_TEGRA_CPUIDLE
 	bool "CPU Idle Driver for NVIDIA Tegra SoCs"
 	depends on (ARCH_TEGRA || COMPILE_TEST) && !ARM64 && MMU
+	depends on ARCH_SUSPEND_POSSIBLE
 	select ARCH_NEEDS_CPU_IDLE_COUPLED if SMP
 	select ARM_CPU_SUSPEND
 	help
-- 
2.29.2