psci: add CPU_IDLE dependency

I ran into a build error for the psci_checker:

drivers/firmware/psci_checker.o: In function `psci_checker':
psci_checker.c:(.init.text+0x528): undefined reference to `cpuidle_devices'

As far as I can tell, this is simply a very rare combination of options,
but the problem has existed since the code was initially added.
Adding a Kconfig dependency makes it build properly.

Fixes: ea8b1c4a6019 ("drivers: psci: PSCI checker module")
Acked-by: Kevin Brodsky <kevin.brodsky@arm.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index fa87a055905ea61071b3b52bcd5c91c924351e8b..7db73c833d28d2e945ba9c9bfffa85eb5696ba89 100644 (file)
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -10,7 +10,7 @@ config ARM_PSCI_FW
 
 config ARM_PSCI_CHECKER
        bool "ARM PSCI checker"
-       depends on ARM_PSCI_FW && HOTPLUG_CPU && !TORTURE_TEST
+       depends on ARM_PSCI_FW && HOTPLUG_CPU && CPU_IDLE && !TORTURE_TEST
        help
          Run the PSCI checker during startup. This checks that hotplug and
          suspend operations work correctly when using PSCI.