Commit b3f46658 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

cpuidle, ARM/imx6: Push RCU-idle into driver 



Doing RCU-idle outside the driver, only to then temporarily enable it
again, at least twice, before going idle is suboptimal.

Notably both cpu_pm_enter() and cpu_cluster_pm_enter() implicity
re-enable RCU.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Tested-by: default avatarTony Lindgren <tony@atomide.com>
Tested-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230112195539.821714572@infradead.org
parent e038f7b8

arch/arm/mach-imx/cpuidle-imx6sx.c

+4 −1
Original line number Diff line number Diff line
@@ -47,7 +47,9 @@ static int imx6sx_enter_wait(struct cpuidle_device *dev, 
		cpu_pm_enter();

		cpu_cluster_pm_enter();



		ct_idle_enter();

		cpu_suspend(0, imx6sx_idle_finish);

		ct_idle_exit();



		cpu_cluster_pm_exit();

		cpu_pm_exit();
@@ -87,7 +89,8 @@ static struct cpuidle_driver imx6sx_cpuidle_driver = { 
			 */

			.exit_latency = 300,

			.target_residency = 500,

			.flags = CPUIDLE_FLAG_TIMER_STOP,

			.flags = CPUIDLE_FLAG_TIMER_STOP |

				 CPUIDLE_FLAG_RCU_IDLE,

			.enter = imx6sx_enter_wait,

			.name = "LOW-POWER-IDLE",

			.desc = "ARM power off",