[PATCH RFC v3 10/12] arm64: kernel: add CPU idle call
Lorenzo Pieralisi
lorenzo.pieralisi at arm.com
Thu Nov 21 06:24:17 EST 2013
When CPU idle is enabled, the architectural idle call should go through
the idle subsystem to allow CPUs to enter idle states defined
by the platform CPU idle back-end operations.
This patch, mirroring other archs behaviour, adds the CPU idle call to the
architectural arch_cpu_idle implementation for arm64.
Acked-by: Daniel Lezcano <daniel.lezcano at linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
---
arch/arm64/kernel/process.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index de17c89..50491ec 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -33,6 +33,7 @@
#include <linux/kallsyms.h>
#include <linux/init.h>
#include <linux/cpu.h>
+#include <linux/cpuidle.h>
#include <linux/elfcore.h>
#include <linux/pm.h>
#include <linux/tick.h>
@@ -98,8 +99,10 @@ void arch_cpu_idle(void)
* This should do all the clock switching and wait for interrupt
* tricks
*/
- cpu_do_idle();
- local_irq_enable();
+ if (cpuidle_idle_call()) {
+ cpu_do_idle();
+ local_irq_enable();
+ }
}
#ifdef CONFIG_HOTPLUG_CPU
--
1.8.4
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