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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2013-07-17 10:12:24 +0100
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2013-12-16 17:17:35 +0000
commitb8824dfe1b3fe1d4ef3d7ee78a071b8290d3b153 (patch)
treee171e8bee9cc6b557329f376eeb60d5583a94d70 /arch/arm64
parentarm64: enable generic clockevent broadcast (diff)
downloadlinux-dev-b8824dfe1b3fe1d4ef3d7ee78a071b8290d3b153.tar.xz
linux-dev-b8824dfe1b3fe1d4ef3d7ee78a071b8290d3b153.zip
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>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/process.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index de17c89985db..50491ec4de34 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