ARM: EXYNOS: Fix build breakage cpuidle on !SMP

The Exynos cpuidle driver has coupled cpuidle built-in so it cannot be
built without SMP:

arch/arm/mach-exynos/pm.c: In function 'exynos_cpu0_enter_aftr':
arch/arm/mach-exynos/pm.c:246:4: error: implicit declaration of function 'arch_send_wakeup_ipi_mask' [-Werror=implicit-function-declaration]
arch/arm/mach-exynos/built-in.o: In function 'exynos_pre_enter_aftr':
../arch/arm/mach-exynos/pm.c:300: undefined reference to 'cpu_boot_reg_base'
arch/arm/mach-exynos/built-in.o: In function 'exynos_cpu1_powerdown':
../arch/arm/mach-exynos/pm.c:282: undefined reference to 'exynos_cpu_power_down'

Fix it by adding missing checks for SMP.

Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

3 files changed, 5 insertions, 2 deletions

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 9e9dfdfad9d7..4031a96c904b 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -211,7 +211,7 @@ static void __init exynos_dt_machine_init(void)
         if (!IS_ENABLED(CONFIG_SMP))
                 exynos_sysram_init();
 
-#ifdef CONFIG_ARM_EXYNOS_CPUIDLE
+#if defined(CONFIG_SMP) && defined(CONFIG_ARM_EXYNOS_CPUIDLE)
         if (of_machine_is_compatible("samsung,exynos4210"))
                 exynos_cpuidle.dev.platform_data = &cpuidle_coupled_exynos_data;
 #endif
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index e6209dadc00d..5685250693fd 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -181,6 +181,7 @@ void exynos_enter_aftr(void)
         cpu_pm_exit();
 }
 
+#if defined(CONFIG_SMP) && defined(CONFIG_ARM_EXYNOS_CPUIDLE)
 static atomic_t cpu1_wakeup = ATOMIC_INIT(0);
 
 static int exynos_cpu0_enter_aftr(void)
@@ -302,3 +303,4 @@ struct cpuidle_exynos_data cpuidle_coupled_exynos_data = {
         .pre_enter_aftr         = exynos_pre_enter_aftr,
         .post_enter_aftr                = exynos_post_enter_aftr,
 };
+#endif /* CONFIG_SMP && CONFIG_ARM_EXYNOS_CPUIDLE */
diff --git a/drivers/cpuidle/cpuidle-exynos.c b/drivers/cpuidle/cpuidle-exynos.c
index 26f5f29fdb03..9bb5348995a9 100644
--- a/drivers/cpuidle/cpuidle-exynos.c
+++ b/drivers/cpuidle/cpuidle-exynos.c
@@ -117,7 +117,8 @@ static int exynos_cpuidle_probe(struct platform_device *pdev)
 {
         int ret;
 
-        if (of_machine_is_compatible("samsung,exynos4210")) {
+        if (IS_ENABLED(CONFIG_SMP) &&
+            of_machine_is_compatible("samsung,exynos4210")) {
                 exynos_cpuidle_pdata = pdev->dev.platform_data;
 
                 ret = cpuidle_register(&exynos_coupled_idle_driver,