linux-kernel - [PATCH v2] cpuidle: tegra: restrict to ARCH_SUSPEND

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Date:   Sun, 28 Aug 2022 17:51:37 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <treding@...dia.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, linux-pm@...r.kernel.org
Subject: [PATCH v2] cpuidle: tegra: restrict to ARCH_SUSPEND_POSSIBLE

Since 'select' does not follow any dependency chain (ARM_CPU_SUSPEND
in this case), make ARM_TEGRA_CPUIDLE depend on ARCH_SUSPEND_POSSIBLE,
just as ARM_CPU_SUSPEND does.

Fix this kconfig warning:

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]

and subsequent build errors:

arm-linux-gnueabi-ld: arch/arm/kernel/sleep.o: in function `__cpu_suspend':
(.text+0x68): undefined reference to `cpu_sa110_suspend_size'
arm-linux-gnueabi-ld: arch/arm/kernel/suspend.o: in function `__cpu_suspend_save':
suspend.c:(.text+0x478): undefined reference to `cpu_sa110_do_suspend'
arm-linux-gnueabi-ld: suspend.c:(.text+0x4e8): undefined reference to `cpu_sa110_do_resume'

Fixes: faae6c9f2e68 ("cpuidle: tegra: Enable compile testing")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: kernel test robot <lkp@...el.com>
Cc: Dmitry Osipenko <digetx@...il.com>
Cc: Thierry Reding <treding@...dia.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: linux-pm@...r.kernel.org
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
v2: add Arnd's Reviewed-by.

 drivers/cpuidle/Kconfig.arm |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/cpuidle/Kconfig.arm
+++ b/drivers/cpuidle/Kconfig.arm
@@ -102,6 +102,7 @@ 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