Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> --- drivers/cpuidle/cpuidle-psci.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -69,12 +69,12 @@ static int __psci_enter_domain_idle_stat return -1; /* Do runtime PM to manage a hierarchical CPU toplogy. */ - rcu_irq_enter_irqson(); if (s2idle) dev_pm_genpd_suspend(pd_dev); else pm_runtime_put_sync_suspend(pd_dev); - rcu_irq_exit_irqson(); + + rcu_idle_enter(); state = psci_get_domain_state(); if (!state) @@ -82,12 +82,12 @@ static int __psci_enter_domain_idle_stat ret = psci_cpu_suspend_enter(state) ? -1 : idx; - rcu_irq_enter_irqson(); + rcu_idle_exit(); + if (s2idle) dev_pm_genpd_resume(pd_dev); else pm_runtime_get_sync(pd_dev); - rcu_irq_exit_irqson(); cpu_pm_exit(); @@ -240,6 +240,7 @@ static int psci_dt_cpu_init_topology(str * of a shared state for the domain, assumes the domain states are all * deeper states. */ + drv->states[state_count - 1].flags |= CPUIDLE_FLAG_RCU_IDLE; drv->states[state_count - 1].enter = psci_enter_domain_idle_state; drv->states[state_count - 1].enter_s2idle = psci_enter_s2idle_domain_idle_state; psci_cpuidle_use_cpuhp = true;
