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arm64: kernel: add CPU idle call

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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@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Lorenzo Pieralisi
2013-07-17 10:12:24 +01:00
committed by Alex Shi
parent b5db5222b5
commit 9bbf6e3e9c
1 changed files with 5 additions and 2 deletions
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7
arch/arm64/kernel/process.c
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@@ -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