Messages in this thread Patch in this message | | | From | Nicolas Pitre <> | Subject | [PATCH v2 1/6] idle: move the cpuidle entry point to the generic idle loop | Date | Wed, 29 Jan 2014 12:45:08 -0500 |
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In order to integrate cpuidle with the scheduler, we must have a better proximity in the core code with what cpuidle is doing and not delegate such interaction to arch code.
Architectures implementing arch_cpu_idle() should simply enter a cheap idle mode in the absence of a proper cpuidle driver.
Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> --- kernel/cpu/idle.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/cpu/idle.c b/kernel/cpu/idle.c index 988573a9a3..ffcd3ee9af 100644 --- a/kernel/cpu/idle.c +++ b/kernel/cpu/idle.c @@ -3,6 +3,7 @@ */ #include <linux/sched.h> #include <linux/cpu.h> +#include <linux/cpuidle.h> #include <linux/tick.h> #include <linux/mm.h> #include <linux/stackprotector.h> @@ -95,7 +96,8 @@ static void cpu_idle_loop(void) if (!current_clr_polling_and_test()) { stop_critical_timings(); rcu_idle_enter(); - arch_cpu_idle(); + if (cpuidle_idle_call()) + arch_cpu_idle(); WARN_ON_ONCE(irqs_disabled()); rcu_idle_exit(); start_critical_timings(); -- 1.8.4.108.g55ea5f6
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