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Subject: [tip: sched/core] cpuidle, ARM/imx6: Push RCU-idle into driver
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Tony Lindgren <tony@atomide.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Frederic Weisbecker <frederic@kernel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>, x86@kernel.org,
linux-kernel@vger.kernel.org
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References: <20230112195539.821714572@infradead.org>
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[tip:,sched/core] cpuidle, ARM/imx6: Push RCU-idle into driver
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Commit Message
tip-bot2 for Thomas Gleixner
Jan. 13, 2023, 12:31 p.m. UTC
The following commit has been merged into the sched/core branch of tip: Commit-ID: b3f46658ce40a3467cda82f920dd9d5325ab0eaf Gitweb: https://git.kernel.org/tip/b3f46658ce40a3467cda82f920dd9d5325ab0eaf Author: Peter Zijlstra <peterz@infradead.org> AuthorDate: Thu, 12 Jan 2023 20:43:22 +01:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Fri, 13 Jan 2023 11:46:40 +01:00 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: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/20230112195539.821714572@infradead.org --- arch/arm/mach-imx/cpuidle-imx6sx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c index 74ea172..1dc01f6 100644 --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -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",