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arm64: kernel: add CPU idle call 

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
parent 1f85008e74
commit b8824dfe1b
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/kallsyms.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/cpuidle.h>
#include <linux/elfcore.h> #include <linux/elfcore.h>
#include <linux/pm.h> #include <linux/pm.h>
#include <linux/tick.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 * This should do all the clock switching and wait for interrupt
* tricks * tricks
*/ */
cpu_do_idle(); if (cpuidle_idle_call()) {
local_irq_enable(); cpu_do_idle();
local_irq_enable();
}
} }
#ifdef CONFIG_HOTPLUG_CPU #ifdef CONFIG_HOTPLUG_CPU