From: Arnd Bergmann arnd@arndb.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@infradead.org Cc: stable@vger.kernel.org Reviewed-by: Dmitry Osipenko digetx@gmail.com Signed-off-by: Arnd Bergmann arnd@arndb.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(+)

diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 747aa537389b..f0714a32921e 100644 --- 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 @@ -110,6 +111,7 @@ 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 ARCH_SUSPEND_POSSIBLE select ARM_CPU_SUSPEND select CPU_IDLE_MULTIPLE_DRIVERS select DT_IDLE_STATES