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[PATCH] psci: add CPU_IDLE dependency

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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")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/firmware/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 6e4ed5a9c6fd..1983e6e0106f 100644
--- 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.
-- 
2.9.0

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[PATCH] psci: add CPU_IDLE dependency Arnd Bergmann <arnd@arndb.de> - 2017-07-31 11:00 +0200
  Re: [PATCH] psci: add CPU_IDLE dependency Kevin Brodsky <kevin.brodsky@arm.com> - 2017-07-31 12:20 +0200
    Re: [PATCH] psci: add CPU_IDLE dependency Jean Delvare <jdelvare@suse.de> - 2017-07-31 16:20 +0200
      Re: [PATCH] psci: add CPU_IDLE dependency Kevin Brodsky <kevin.brodsky@arm.com> - 2017-07-31 18:30 +0200
  Re: [PATCH] psci: add CPU_IDLE dependency Nishanth Menon <nm@ti.com> - 2017-07-31 14:40 +0200

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