linux-kernel - [PATCH] psci: add CPU

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Date:   Mon, 31 Jul 2017 10:55:00 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Kevin Brodsky <kevin.brodsky@....com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Olof Johansson <olof@...om.net>, Tero Kristo <t-kristo@...com>,
        Thierry Reding <treding@...dia.com>,
        Carlo Caione <carlo@...lessm.com>, Nishanth Menon <nm@...com>,
        Jean Delvare <jdelvare@...e.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] 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")
Signed-off-by: Arnd Bergmann <arnd@...db.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